Drum brake for bike
Everybody knows the foot brake of a bicycle. this is the most popular brake on bicycles of the Soviet era. Even today it is the most popular single speed bike brake. The drum brake is located in the rear hub, the body of such a hub acts as a drum, and the pads are located inside. When the brake is applied, the pads are pressed against the inner surface of the hub and provide braking.
The brake drive can be manual, cable, or foot, pedaling in the opposite direction. The manual drive is practically not used.
Drum brakes have significant advantages and no less noticeable design disadvantages.
Drum brakes advantages:
- Powerful brakes with stepless deceleration control.
- Virtually sealed, requiring a minimum of maintenance.
- Do not wear out or place special requirements on the wheel rim.
Disadvantages of drum brakes:
- The main disadvantage is incompatibility with rear derailleur gearshift systems. Therefore, they are used on single-speed or bicycles with a planetary hub.
- Poorly cooled and even on small long descents lose efficiency.
- The braking force depends on the position of the pedal cranks in relation to the road. If the connecting rods are perpendicular to the road, the braking force tends to 0.
- Significantly load the hub and wheel spokes.
- If your bike’s chain has fallen off, then you lose the brakes. This is very dangerous and the drum brake must be duplicated with a rim brake.
- It is very difficult to actively pedal and still use the brake.
Bicycle jog and roller brakes
Stiff brakes are reminiscent of train brakes: the brake shoe is pressed directly against the wheel tread. There is no need to talk a lot about the features of this system, since such a design has not been found on new bicycles for a long time. The speed brake is still used on bicycles in India and China. Fortunately, these models do not enter our market.
Roller brakes emerged as a result of the desire of one large manufacturer of bicycle components to make the perfect brake by removing the disadvantages of drum brakes (we’ll talk about them below). The brake hub was replaced with rollers, and the brake drum was fitted with a radiator for better cooling and removed from the wheel hub. The roller system does not require frequent maintenance and provides effective braking during normal driving. With a leisurely ride, these brakes serve for years without any adjustments. At the same time, in harsh operating conditions, roller brakes have no advantage.
Disadvantages of roller brakes:
- The largest weight of all braking systems.
- The complexity of the design and a considerable price.
- Most suspension forks do not support this type of brake.
- The brake does not block the rotation of the wheel in the opposite direction.
- The exclusive design makes it difficult to find spare parts, and there are no cheap consumables.
Roller brakes advantages:
- The rim geometry does not affect brake performance. “Eights” and “eggs” do not reduce the braking efficiency
- Excellent protection against dirt, dust and good water resistance.
- They require a minimum of adjustments and, with proper maintenance, are eternal.
- Almost the most efficient brakes.
Braking is provided by pressing the brake pads against a special track on the wheel rim. The most popular type of brakes today. Sufficiently effective brakes with excellent maintainability.
They differ in the way the brake pads are brought to the rim, but the principle of operation of different options for rim brakes is the same. Ideal for beginners: easy to set up, easy to adjust and very easy to repair in the field.
There are four types of rim brakes: caliper, cantilever, hydraulic and V-brakes. about each type:
- V. brake. When fully closed, the brake levers form a V. Best performance of any rim brake. The most demanded type and even overtake disc ones in popularity.
- Cantilevers are the prototype of V-brake brakes. Have been popular in the past. difficult to set up, with the advent of V-brake, have lost their relevance.
- Tick-borne. so called because of the levers, which resemble ticks in appearance. Today they are used only on road models due to the smallest mass. Less durable than other types due to only one attachment point to the fork.
- Hydraulic. the force from the brake lever to the brake pads is transmitted by a hydraulic line filled with a special fluid.
WHAT MAKES IT WORK? #13 The Bicycle Coaster Brake tubalcain
The advantages and disadvantages of all types of rim brakes are the same.
Disadvantages of rim brakes:
- Any particles or liquid trapped between the surface of the rim and the brake pads will reduce the braking efficiency, accelerate the wear of the pads, and in severe cases, remove the chips and wipe the rim.
- May bend or spread the bike fork stays.
- Brake pads wear out pretty quickly. Fortunately, they are inexpensive.
- A bent rim greatly reduces brake performance and causes uneven pad wear.
Advantages of rim brakes:
- Light stress on the spokes and rim of the bike.
- Low price compared to disc brakes.
- Allows extended use of the brake, although may overheat the rim.
- Very light when compared to disc brakes.
- Easy maintenance and setup.
Like any other high-speed vehicle, a bicycle needs brakes. The safety of the cyclist depends on the quality of the brakes. It should be mentioned that track and some other models do without a mechanical brake system. The pedals are rigidly connected through a chain to the rear wheel hub, and braking is performed by slowing down the rotation of the pedals or by suddenly transferring the cyclist’s weight to one pedal, followed by blocking the drive wheel.
Anyone can understand that blocking has a negative effect on the condition of the tire, and the skidding movement of the wheel complicates the handling of the bike. For a sports bike, the absence of a brake is a way to reduce weight and increase the reliability of the structure, but riding such bicycles requires special equipment and will not add comfort to an ordinary person.
In general, the topic of choosing brakes is one of the most confusing and scandalous topics regarding the choice of bicycle components. Brakes differ in braking efficiency, maintainability, and durability. Many people with different experiences and needs are supporters of one design or another.
In the article we will give an idea about the design of braking systems and mentioning the advantages and disadvantages of each, we will start the review with the least common. Even if you do not plan to service the bike yourself, you will need the knowledge to choose the brakes to replace the worn out ones or if the old brakes cease to suit you.
Bicycle disc brakes
Disc brakes are the most modern brakes, rapidly replacing all other types. They consist of a brake lever, brake cable or hydraulic line, brake disc (rotor) and brake machine (caliper).
The force from the brake lever is transmitted through a cable or hydraulic line to the brake machine. a caliper attached to the fork near the wheel axis. The caliper transmits force to the brake pads and compresses the rotor mounted on the wheel hub.
The advantages of disc brakes:
- Rotor and pads are high off the road and slightly dirty.
- Disc brake allows precise adjustment of the braking force.
- Wheel rim geometry does not affect braking performance.
- The rim does not wear out, with proper adjustment, the long service life of the mechanism.
Disadvantages of disc brakes:
- Brake pads from different brands are not compatible with each other.
- Overloading the wheel hub and spokes during braking.
- Repair requires qualifications and special tools and is almost impossible in the field.
- weight than rim systems.
- Good disc brakes are expensive. And cheap discs are inferior in efficiency to equal in price or cheaper rims.
- The caliper may interfere with the installation of a rear rack on a bike.
With all the variety of braking systems, the main competition today is between V-brakes and disc brakes. V-brakes occupy the lower price point, as well as the sports segment with stringent bike weight requirements. Although disc brakes are considered the future, rim brakes are still very good for normal non-aggressive driving.
You can buy bicycle brakes in Kiev with delivery in Ukraine from VeloGO.
In front of you, the parachute brake reduces the speed and kinetic energy in order for the ejected pilot to land safely on the ground.
If you are moving you have energy. kinetic energy to be precise. Kinetic energy is simply the energy that an object possesses as it has mass and velocity (velocity in a specific direction). The more mass you have (the heavier) and the faster you move, the more kinetic energy you have.
All this is of course good. But what if you suddenly need to stop? How to go from fast movement to not moving at all. To do this, you need to get rid of your kinetic energy.
For example, if you are jumping from a height from a flying plane, then the best way to lose energy is with a parachute. Thanks to the giant cloth bag that flies behind you, it slows you down, reducing your speed and therefore the parachute helps to get rid of your kinetic energy.
As a result, the parachute allows you to safely land on the ground safe and sound.
By the way, powerful dragster cars, which are champions in acceleration from a standstill, as well as sports cars that can accelerate to record speeds, are also used to stop parachutes. But most conventional cars, as you know, use the traditional hydraulic braking system to stop and slow down, which was invented back in the early 20th century.
Imagine how much strength you need to stop a fast car. Simply pressing the brake pedal would not generate enough force to activate all four brakes in a way that would quickly bring your vehicle to a stop. This is why the brakes use hydraulics: a system of pipes filled with brake fluid to increase your braking power. Also, thanks to hydraulics, braking forces can be transferred easily from one place to another in a short time.
When you press the brake pedal, your foot essentially moves a lever, which forces the piston in the long narrow brake cylinder (brake master cylinder) to move, which in turn starts to move the hydraulic fluid (brake fluid) towards the narrow tube at the end brake cylinder.
This tube is usually connected to the same diameter of the tube going to each brake of the car. Further, the brake fluid through narrow tubes enters the larger cylinders located on the wheels.
Since the brake cylinders located on each wheel are much larger than the cylinder located in the brake system immediately after the brake pedal, the force you initially applied to the brake pedal is greatly increased. As a result, this force compresses the brake pads in each wheel brake.
- 1. Your foot presses the brake pedal.
- 2. When the pedal moves down, it pushes the lever, which is connected to the piston of the master brake cylinder.
- 3. The lever pushes the piston (blue in the picture) into a narrow cylinder that is filled with hydraulic brake fluid (indicated in red). As the piston moves in the cylinder, it compresses the brake fluid and pushes it into a narrow hole located at the end of the cylinder to which the tube is connected. This happens in much the same way as a hand pump squeezes air from a cylinder into a thin hose.
- 4. As a result of the generated pressure, the brake fluid enters a long brake line, consisting of brake pipes that fit each wheel. As a result of the built-up pressure from the master cylinder, the brake fluid eventually reaches each wheel.
- 5. Further, the fluid under pressure enters the brake cylinders located in the wheels, which are larger than the main brake cylinder (the cylinder in the wheel is marked in blue).
- 6. When fluid enters the brake cylinder, which has a larger volume compared to the main brake cylinder, the braking force is greatly increased due to the difference in the volume of the cylinders in the brake system.
- 7. As a result of the increased fluid pressure, the piston in the wheel brake cylinder clamps the brake pad, pressing it against the brake disc / drum.
- 8. As a result of friction between the brake pad and the brake disc, the wheel disc decelerates, which ultimately stops the car.
Our simple example shows the basic principle of a hydraulic braking system; in practice, everything is a little more complicated.
In fact, the brake pedal actually controls four separate hydraulic brake lines to all four wheels. In our example, we show the principle of operation of brakes on one wheel of a car.
For safety, as a rule, all vehicles use two separate hydraulic brake circuits. This is necessary in case one brake circuit is suddenly out of order due to some malfunction. In this case, the second circuit of the entire braking system will continue to function.
What is the braking system in the car.
Probably, many drivers are familiar with the situation when, for example, a dog, cat or any other animal unexpectedly runs out onto the road. Agree a very unpleasant moment. After all, we have only a split second to react to the situation. At this point, most of us will probably step on the brake pedal, and we will be confident that the car will instantly start to stop. But why are we confident about the brakes? How does the braking system work in a car? Let’s find out how brakes use science to stop a heavy car.
Aircraft have brakes inside their wheels. This helps to stop the plane on the runway. Also in aircraft, air brakes can be used, which increase air resistance, which ultimately slows down the aircraft during flight. Including the aircraft can also slow down due to the reverse thrust of the engines, if the pilot turns on the reverse.
How Brakes Work in a Car: An Explanation
Different brakes for different types of transport
In cars, trucks, airplanes and trains, brakes generally work in the same way. There are also many other modes of transport in the world that also have a similar braking principle. Wind turbines even have brakes. Here is a quick comparison of some common braking systems.
Features of Hydraulic Bicycle Brakes
The vector of action of the brakes, both mechanical and hydraulic, is one. stop. machine. But there are a lot of nuances and questions to both one and the other brake drive circuit. Today we will try to wash the bones with hydraulic brakes.
Their main difference from mechanics is that a hydraulic line is used to drive the brake pads, and not cables. The hydraulics connect the brake levers directly to the brake mechanism. In the role of which can be both disc hydraulic brakes and conventional rim.
Advantages and disadvantages of hydraulics
Dosing accuracy and the speed of response of the mechanism to pressing the handle are the two main qualities that have led to the widespread use of hydraulic brakes. These are not the only advantages, but they are the ones that made the downhill athletes turn to hydraulics.
The excellent endurance of the hydraulic brakes also played a role in the migration of hydraulics to the bike. As well as the accuracy of actuation, this was a very important quality for downhill.
The reliability of the system has been proven over the years of its use on cars. With proper care, hydraulic brakes on bicycles are many times more reliable than mechanics. A heightened sense of the strength of the dosage allows you to manipulate the brakes with jewelry precision. In extreme sports, this is a must.
The disadvantages of hydraulic brakes include the following:
The cost of a hydraulic system is much higher than a mechanical one, therefore a bicycle with hydraulic brakes will be more expensive.
Complexity of service. The hydraulic system is a rather complex and technologically advanced unit that requires maintenance skills and a clear knowledge of the design and its features. Not every biker is able to independently sort out the system and carry out its high-quality repair. Also, field repairs in the absence of experience can be difficult. Brake pipes and hoses require careful handling. They are quite vulnerable and the quality of the entire system depends on their condition. Also, brakes can be picky about the quality of the brake fluid or oil, so you should make a deliberate choice when pumping.
Most often, hydraulic brakes are used in tandem with disc brakes. Literally a few words should be said about them.
Types of hydraulic disc brakes
The main difference between a disc brake and a conventional rim brake is that braking occurs by clamping the brake disc, rigidly fixed to the hub, with brake pads, which are fixed at the rear on the frame and at the front on the fork stays.
The design of the main brake cylinder can be different, and depending on this, hydraulic brakes are divided into the following types:
- Single piston;
- Twin-piston with opposed pistons;
- Two-piston with floating pistons;
Mostly used two-piston with opposed pistons. There are also single-piston ones, but due to shortcomings, they were almost completely replaced by two-piston ones. Complex multi-piston systems are used mainly for downhill, where power plays a decisive role, rather than simplicity of design.
Due to the type of fluid used in hydraulic systems, brakes can operate on brake fluids and oil. Each of them has its own advantages and disadvantages, but there is no unequivocal opinion on this matter. The caliper can be monolithic, which makes the structure stiffer and lighter, and composite. cheaper in price, but more difficult to maintain.
The hydraulic disc brake is very reliable, but it is not easy to repair and adjust in the field. True, to bring the hydraulic brake to a coma state, you need to try very hard.
There are some problems associated with the fact that disc hydraulics have a very small gap between the pads and in the presence of heavy dirt, the pads are subject to increased wear. But the mechanics have no advantages in this case, since worn out pads cannot be adjusted on the fly, while hydraulics are supplied automatically in the course of wear.
They are more expensive than rim ones, slightly increase the load on the hub during braking, although this is a controversial issue. We will not delve into the details of the drive in detail, since this is a separate topic for conversation, but for now, let’s start considering what the manufacturers have prepared for those who want to put hydraulic brakes on the bike.
Principle of operation
The brake line is filled with a special oil or brake fluid under low pressure. When the brake lever is depressed, the bicycle brake cylinder displaces fluid from the hydraulic system and it applies pressure to the slave cylinder, which is mounted on the fork or bike frame. In turn, the slave cylinder drives the piston and brake pads, which block the wheel by means of the brake disc. Very simple. Here is a diagram for clarity.
When working with hydraulic brakes, Honor says that brake fluid is very toxic and can cause severe poisoning. It also has a detrimental effect on paintwork and plastic parts.
Review of the best
Out of a million types of braking systems, hydraulics are increasingly found on mid to very mid-range bikes. As their popularity grows, the price falls accordingly. Therefore, it makes sense to consider converting your bike to a hydraulic braking system. There are many examples, but we will give only two. For contrast.
Shimano unveiled a new collection earlier this year, revamping the Deore line. Nice grips, stable operation of the main brake cylinder gives real pleasure from precise actuation and obedience of the entire system as a whole. A slight rattling of the handle itself darkens the picture a little.
The new range offers a choice of splined or bolted rotor mounting. Shimano Deore comes with two types of pads. rubberized and metallized. The former wear out very quickly. The hydraulics in general are of excellent quality and their 50 is definitely worth.
CLIM 8 CLARK`S. The advantage of these brakes is that for the price of a single cylinder you get a full multi-cylinder hydraulic brake. But miracles do not happen, and you have to pay for everything. The design of the handles is a bit alarming, but it’s not for everybody. But the hydraulic hoses are reinforced with Kevlar and metal.
The caliper has an interesting six-cylinder design that promises to be reliable. The disadvantages of this system are the slightly increased weight. In installation, they are also not as easy as they seem. during installation, they require careful adjustment of the pads to the discs.
Bleeding the brake hydraulic system
Reasons why you should do brake bleeding:
- when you press the brake lever, it goes to the grip itself, i.e. has too long a stroke, but at the same time the pads do not move, or do not reach the brake disc;
- the brake lever falls through when pressed or has too little movement;
- when the handle is pressed sharply, after the brake is activated, the handle continues to fall smoothly.
All clear. The reason for the failure of the brake system was the air that got inside. The first step is to find the place where the system grabbed the air. This can be damaged hydraulic fittings, boiling of the liquid due to overheating, a weakened pumping union on the cylinder. After checking the entire system for fluid leaks, you can start pumping.
We always pump the hydraulics on a flat and horizontal surface. The pads should be spread apart so that they do not reach the disc. Next, we unscrew the master cylinder and fix it strictly horizontally. Each system has its own characteristics of pumping, so it is better to do it according to the instructions. The pumping fluid must correspond to the brand indicated in the passport.
Now you should put the cambric on the bleed bolt and immerse it in a container to collect the remaining fluid. We unscrew the cover of the expansion tank, fill in the liquid to the maximum level. Several times smoothly and slowly press the brake lever. Press until it becomes tight. Now holding the handle, unscrew the bleed bolt with a cambric, without releasing the handle. Add liquid to the expansion tank. We carry out the procedure until the handle becomes stiff. We twist the expansion tank and remove the tool. Done, brakes pumped.
So the rumors about the difficulty in servicing hydraulic brakes are greatly exaggerated. Along with some disadvantages, such a system has more advantages. And in principle, the principle of operation of this or that mechanism is not so important to a real biker as the very fact of free movement in space.
DIY bike brake repair
How to tighten the rim brake on a bicycle?
No matter how cool your bike is, it’s almost impossible to completely avoid the problems associated with it. This should be understood and taken into account, because the flawless operation of the rotor and the entire system of rim brakes, rotation of the wheels and switches largely depends on how carefully the bicycle owner treats his vehicle. The pads and cables connecting all their components must be in proper condition, otherwise, a major overhaul of the entire system is simply inevitable.
Coaster Brake Hub. What’s Inside? How Does It Work? Cutaway View!
It is impossible to avoid all problems. However, you can protect yourself from most of them. To do this, you need to know what the operation of the entire system is like, what the rotor, caliper, each lever and all available handles are. You should also understand what all the bolts that are on the bike are responsible for, and understand what, in general, the brakes are.
Some of them work properly and do not need any adjustment at all. However, such luck is rare, and often you have to answer the question of how to adjust the brakes on a bicycle, in an accelerated manner. Not everyone is accustomed to monitoring the condition of both rim brakes and disc brakes, therefore, most often, problems “appear” suddenly, and require immediate attention.
In order to avoid such unforeseen problems, and postpone the repair of your wheels and disks, it is better to check them again and make sure that everything is in order. If this was not done in a timely manner, it is important to remember what adjustment of the brakes on a bicycle is and how to do it correctly.
Checking and adjusting: where to start?
Answering this question, it should be noted, first of all, that not all parts need adjustment. If the brakes react quickly and are triggered immediately after the handle is clamped, abruptly and without delay, then most likely such parts do not need repairs, and it will not be difficult to set them up correctly on the bike with your own hands. This process will take several minutes and does not require any special approach or skills.
The situation is much more complicated with those systems in which some failures have occurred. Examples include increased chain-to-core disc brake clearance, loose bolts, sticky handles, or a defective rotor. Most often, the problem is that the lever responsible for tightening the cable is working slowly due to the fact that the brakes are not adjusted correctly. This type of breakdown is the most common and easiest to repair.
Often, in order to adjust the brakes with such a breakdown, it is enough to simply tighten the cables and thus “make” them work correctly. Sometimes it is necessary to tighten the bolts, lubricate the rotor or brake pads. In some cases, this is not enough and it is necessary to completely replace one or several components of the system at once.
Simply put, sometimes it’s enough to just spin the wheels one at a time and make sure that the braking systems are working properly. But it also happens that the cables or the rotor need to be tuned. Such problems should not be treated negligently, because both the comfort and safety of the cyclist depend on how correctly all the parts of the bike work.
How to set up the brakes?
In order to set them up correctly and avoid common mistakes, it is important to understand what they are and how they differ. Repairing disc brakes is somewhat different from working on adjusting rim brakes, and you shouldn’t forget about it.
Determining the type of brakes is not the only part of setting them up. It includes a number of steps to help get even the most frustrated brake pads back to normal. Below you can see the sequence of the setup process:
- The first step is to check the correct type of brakes. As already mentioned above, it also depends on what actions will need to be taken next;
- The next step is scrolling the wheels and sequentially squeezing the right and left handles. This will help detect the problem of both disc and rim brakes, if any at all;
- Next, you need to check the condition of each cable, and find out how quickly they respond to braking signals;
- The bolts that are located on each of the handles will help you to tighten the cable so that it responds in a timely manner to the signals given;
- In cases where it is not possible to adjust the cable with your hands, you can use the caliper. With its help, you can easily pull up the desired cable, and adjust it to the desired state. The bolt at the end of the cable, as a rule, is tightened to the stop;
- The next thing to check is the brake pads. Repairing this part of the system is difficult, so you should not start it. As a rule, regular lubrication of the pads helps to increase their life, and greatly simplifies the adjustment and repair of the entire rim or disc brake system;
- When there is not enough lubricant to keep the pads running, it is worth checking the condition of the bicycle wheels. Adjusting them may help to avoid costly disc brake replacement. When it comes to adjusting rim brakes, this problem does not arise. the pads in them can be easily replaced with new ones or tightened.
Overall, these tips should be enough to get you started with what brakes are and how they work. However, rim and disc brakes have their own fundamental differences, which would be unreasonable to ignore.
The first thing to note is that rim systems are much more common than disc systems. The latter have recently entered the market, and therefore are not yet in such wide demand among buyers.
There are significantly fewer problems with disc systems than with rim systems. with the right attitude to the bike and careful use of each handle, lever and wheels, there will be no problems at all. With proper attitude to your bike, it will not need repairs, and a simple setup will not cause any difficulties.
how to adjust disc brakes on a bicycle
How the parking brake works
The mechanism is activated by moving the lever to the vertical position until the latch clicks. As a result, the cables that press the rear wheel brake pads against the drums become stretched. Rear wheels are blocked, braking occurs.
To remove the car from the handbrake, you need to hold down the locking button and lower the lever down to its original position.
The device and principle of operation of the parking brake
The parking brake (also known as the handbrake, or in everyday life “handbrake”) is an integral part of the vehicle’s braking control. Unlike the main braking system used by the driver while driving, the parking brake system is primarily used to hold the vehicle in place on sloping surfaces, and can also be used as an emergency emergency braking system when the main brake system fails. From the article we learn about the device and the principle of operation of the parking brake.
Parking brake types
By the type of drive, the handbrake is divided into:
- electromechanical parking brake (EPB).
Parking brake cable drive
The first option is most common due to its simplicity of design and reliability. To activate the parking brake, just pull the handle towards you. Tightened cables will block the wheels and reduce speed. The vehicle will brake. The hydraulic handbrake is used much less often.
According to the method of engaging the parking brake, there are:
- pedal (foot);
- with lever.
Foot parking brake
The pedal operated handbrake is used on vehicles with automatic transmissions. The handbrake pedal in such a mechanism is located at the place of the clutch pedal.
There are also the following types of parking brake drive in brakes:
- central or transmission.
Drum brakes use a lever that, when the cable is pulled, acts on the brake pads. The latter are pressed against the drum, and braking occurs.
When the central parking brake is activated, it is not the wheels that are locked, but the propeller shaft.
There is also an electric handbrake drive, where the disc brake mechanism interacts with the electric motor.
Parking brake device
- a mechanism that actuates the brake (pedal or lever);
- cables, each of which acts on the main braking system, resulting in braking.
In the design of the brake drive of the handbrake, from one to three cables are used. The three-wire scheme is the most popular. It includes two rear cables and one front cable. The former are connected to the brakes, the latter to the lever.
The cables are connected to the elements of the parking brake by means of adjustable lugs. At the ends of the cables, there are adjusting nuts that allow you to change the length of the drive. Removal from the brake or return of the mechanism to its original position occurs due to the return spring located on the front cable, equalizer or directly on the brake mechanism.
Parking brake in disc brake
As for cars with disc brakes, the following types of parking brakes are used:
The screw is used in disc brakes with one piston. The latter is controlled by a screw screwed into it. The screw rotates due to the lever connected on the other side with the cable. The threaded piston moves in and presses the brake pads against the disc.
In the cam mechanism, the piston is moved by a cam-driven pusher. The latter is rigidly connected to the lever with a cable. The movement of the pusher with the piston occurs when the cam rotates.
Drum brakes are used in multi-piston disc brakes.
Functions and purpose of the hand brake
The main purpose of the parking brake (or handbrake) is to keep the car in place during long-term parking. It is also used in case of failure of the main braking system during emergency or emergency braking. In the latter case, the handbrake is used as a braking device.
Also, the handbrake is used when making sharp turns on sports cars.
The parking brake consists of a brake drive (usually mechanical) and brakes.
Hand brake operation
In conclusion, we will give a couple of tips for operating the parking brake.
Always check the position of the parking brake before driving. It is not recommended to ride on the handbrake, this can lead to increased wear and overheating of brake pads and discs.
Is it possible to put the car on the handbrake in winter? This is also not recommended. In winter, mud with snow sticks to the wheels and in severe frost, even a short stop can freeze brake discs with pads. Vehicle movement will become impossible, and the use of force can lead to serious damage.
In vehicles with an automatic transmission, despite the “parking” mode, it is recommended to use the handbrake as well. First, it will extend the service life of the parking mechanism. And secondly, it will save the driver from a sudden rollback of the car in a confined space, which, in turn, can lead to undesirable consequences in the form of a collision with a neighboring car.
The parking brake is an important element in a car’s design. Its serviceability increases the safety of vehicle operation and reduces the risk of accidents. Therefore, it is necessary to regularly diagnose and maintain this mechanism.