Brake shoe equalizing support

FIELD: automotive industry; vehicle disk brakes.

SUBSTANCE: one or more brake shoes of disk brake are arranged on fastening plates or on other supports for shoes and/or caliper or like device. Caliper or like device and support for shoes are made for taking up resultant counteracting forces at braking in plane perpendicular to surface of contact between caliper or like device and each support for shoes. Calculated point of action of resultant counteracting forces is within the limits of said surface of contact to provide balancing of brake shoes, thus excluding tendency of turning of shoe supports from caliper or to center of brake. Said calculated point of action of counter acting forces is found from following equation where Heq is perpendicular distance from plane through center of brake disk in which point of action of counteracting forces is found; Ry and Ri are radii from center of brake disk to outer and inner sides of brake shoe; α is angle between line passing through center of brake shoe and center of brake disk and corresponding end of brake shoe.

EFFECT: optimization of position of point of action of counteracting force and taking up of counteracting force in one plane.

10 cl, 4 dwg

 

The technical field

The invention relates to a disc brake and, in particular, to the means of ensuring balanced support for the brake pads. The principles of the present invention can be used regardless of the number of brake discs and cooperating brake pads.

Prior art

The present invention is directed, but not limited to, the creation of brakes with fixed calipers.

Brake pads are usually located on the mounting plates or other supports for brake pads, which are located in the caliper or another tool that performs the same function. During braking, the friction force caused by the clamping force of the brake between the brake pads and the brake disc (disk), is transmitted to the caliper or the like, the frictional Force is perceived as a counteracting force on the contact surfaces between the support (supports) pads and a caliper or the like, creating a braking torque on the drive (s).

Usually the friction force has both horizontal and vertical components, which can collectively be represented as a force with a certain direction and a certain amount. The direction and magnitude are the sum of the different components of the friction force.

The ideal situation when braking occurs, if you brake what omentum resulting countervailing power is perceived in the same plane, perpendicular to the contact area between the supports pads and caliper or other type of holder. Moreover, the resulting countervailing power must be fully balanced in the sense that the resulting countervailing power is the height of the contact area between the support pads and the caliper. This means that countervailing power is transmitted from the support pads directly to the caliper, while not giving any rotation of the support pads. If the brake pad is not fully balanced, it will have a tendency to turn while braking. This rotation can occur in both directions, depending on the actual point of impact of opposing forces. The position of the point of impact of the result of opposing forces varies depending on the distribution of wear of the braking force, temperature, etc.

The opposing forces and the point of impact will depend, inter alia, on the dimensions and design of brake pads, support pads and/or caliper, respectively, and the method and location of bearings brake pads in the caliper.

The invention

The aim of the present invention is to provide brake pads balanced support. This goal is achieved by the fact that the brake design optimizes the position of the point environmenta what I am opposing forces and the that countervailing power is perceived in the same plane. Because, in fact, creating an optimal situation conditions vary significantly, it is also necessary to provide a means of considering the components of the forces acting not only specified in one plane and the point of impact.

The present invention relates to a disk brake having a caliper that surrounds one or more brake discs and one or more brake pads. In addition, the housing Executive brake mechanism attached to the support plate, and one or more brake pads are located on the mounting plates or other supports pads and/or caliper. The aforementioned objective is achieved due to the fact that the caliper and the support pads are made with the ability to perceive the total reaction forces during braking in the plane perpendicular to the contact area between the support plate and each support pad.

Another object of the invention is to minimize the pressure of contact between the support pads and the caliper. By lowering the pressure of contact reduces the risk of damage and, accordingly, the risk of failure.

Other objectives and advantages of the present invention will be obvious to a person skilled in the art upon studying the following detailed about what isane its preferred embodiments.

Brief description of drawings

The invention is described in more detail below by means of examples with reference to the accompanying drawings, on which:

figure 1 is a perspective view of a brake disc according to the present invention;

figure 2 is a perspective view of the first example of the arrangement of the fixing plate and the brake pads according to the present invention;

figure 3 is a perspective view of the second example of the fixing plate and the brake pads according to the present invention;

4 is a General top view of the brake pads, indicating different values.

Detailed description of preferred implementations

Figure 1 presents an example of the disk brake. Disc brake has a caliper 6, the actuator 7 of the brake housing 8 of the actuator of the brake mounting plate 1, 12 and two brake disk 10. In the shown embodiment, the housing 8 of the actuator brake is an integral unit with the carriage 6. The actuator 7 brakes attached to the housing 8 of the actuator brake. At the farthest, with respect to the housing 8 of the actuator of the brake-side end thrust plate 9 is attached to the support plate 6. Brake discs 10 are located on the hub 11 so that the disks 10 can freely exercise their sliding translational movement in the axis of the second direction on the hub 11. Specialist in the art will understand that the brake disk 10 is referred to its moving progressively move on it can be placed on the hub 11 different ways. In the shown example, there are two brake disk 10, but the principle of the present invention is applicable also to the brakes, and having a different number of brake discs 10.

Because of this invention, the specific design of the actuator 7 brakes and the chassis 8 of the actuator brake doesn't matter, its detailed description is not given here.

The mounting plate 1, 12 have the brake pads 2 located on the side intended to come into contact with the brake disk 10. Located in the middle of the mounting plate 1 has the brake pads 2 on both sides for their interaction with the brake discs 10 on both sides. One mounting plate 12 with the brake pads 2 located on the side of the mechanism to interact with one of the brake disk 10. This end thrust plate has recesses (not shown), which includes the brake pads 2, interacting with one of the brake disk 10. According to other implementations (not shown) the mounting plate is also close to the end bearing plate, and in this case, the brake pads is ahadada not in the recesses of the end bearing plate, as mentioned on the mounting plate.

To simplify the brake pads 2 shows the anchoring plates 1, 12. However, the specialist in the art it will be clear that the pads 2 can be located on other types of supports for shoes and/or pads themselves can be made with the possibility of their installation directly in the caliper or similar device. In some cases in this specification, the terms "plate", "bearing pads", "brake pad", etc. are used interchangeably. Also, the term "caliper" is used in a broad sense and, again, includes other tools that perform similar functions.

The mounting plate 1, 12 due to translational sliding movement into the hole of the support plate 6. The ends of the mounting plates 1, 12 in contact with the support plate 6, and therefore the contact surface or contact area is formed between each mounting plate 1, 12 and the support plate 6. Depending on the direction of rotation of the brake discs 10 generated by braking countervailing power is transmitted from one end of each mounting plate to the support plate 6.

Located in the middle of the mounting plate 1 has an upper part 3, passing over the position of the brake pads 2. The ends of the mentioned top 3 are extended in comparison with the Central part of the plot wasselonne areas designed for contact with the support plate 6. The mounting plate 1 is placed in the support plate 6 so that the end part adjacent to the edges of the opening in the support plate 6. Part of the opposing forces will be transmitted through the contact area between the mounting plate 1 and the support plate 6. According to the shown variant implementation, about half of the effort during braking is transmitted through located in the middle of the mounting plate 1. So who is in the middle of the mounting plate 1 must be able to perceive some of the work is more significant than the mounting plate 12, located on the mechanism and the end bearing plate 9 of the support 6. Closest to the body of the mechanism mounting plate 12 also has an upper portion and extended sections 14 for contact with the support plate 6. Mentioned the extended sections 14 is directed from the housing 8 of the mechanism, i.e. toward the center of the caliper 6.

Due to the presence of extended sections 4, 14 for the contact surfaces between the mounting plates 1, 12 and the support plate 6, the pressure of contact is reduced in comparison with mounting brackets without the extended areas. Extended sections 4, 14, if you look at them from above, take the form of curvature; this is the widest part of the curvature is located at the ends of the fixing plates 1, 12. Mentioned a wide range of part 4 of 14 attachment plates 1, 12 also have the shape of a curvature in the radial direction. In Asni and inner radii extended sections 4, 14 change, and the widest part is at the ends of the fixing plates 1, 12. Although according to the shown examples of extended areas have the shape of curvature, specialists in the art it will be clear that they may have other shapes that provide enhanced contact area.

In the ideal case, the braking force, perceived support disks 1, 12, must be taken in the direction perpendicular to the contact area between the mounting plates 1, 12 and the support plate 6. In addition, the position of the components mentioned forces must be within the contact area. With these conditions, the fixing plate 1, 12 will not have a tendency to rotate in either direction. If there is any component of the force is not acting perpendicular to the contact area, or if the point of impact of the opposing forces is outside the contact area, the fixing plate 1, 12 will tend to rotate. The mounting plates 1, 12 can be attached to the tendency of rotation of the support plate 6 or to the center of the brake.

As mentioned above ideal conditions cannot be ever provided partly for the reason that conditions change over time depending on the distribution of wear, the magnitude of the braking force, temperature, etc., there must be provided means what about the accounting of braking forces, not acting in such a way. According to the shown variant of the implementation of these forces are perceived using the clip 13. The clip 13 is attached to the support plate 6 on the side of the engine and passes through the two holes 5, 15 in each mounting plate 1, 12, and one part is based on an end thrust plate 9 of the support 6 and, possibly attached to it. According to the illustrated variant of implementation, the clip 13 is inserted into the holes of the support plate 6 on the side of the mechanism. Specialist in the art will understand that you can use any means of attachment. According to another variant implementation instead of a clamp used rod. The said rod is also attached to the support plate 6 and passes through the holes of the fixing plate 1 and the end bearing plate 9, respectively. Alternatively, the mounting plate 12 on the side of the mechanism is the upper part in the middle, and the rod placed on top of the mounting plate 12. Trends rotation of the fixing plates 1, 12 will counteract the clamp 13, the rod or other appropriate means of counteracting the tendency of the rotation.

Due to the design of the brakes is provided to control the mounting plates 1, 12 or support the brake pads of a different type, so that they, in the absence of perfect condition, had a tendency to regards the GTC in one direction only. Therefore, this technical solution would be only in the perception of the applied force in one direction only. This is done by placing the point of impact of the opposing forces in this situation, in which any normal deviation from the ideal position will give the same trend of turn.

The dimensions of the extended sections of the fixing plates 1, 12 is limited by the size of the opening of the support plate 6, which comprises a mounting plate 1, 12. Moreover, as wear of the brake pads 3, the space between the mounting plates 1, 12 during braking is reduced. This also applies to the distance between the end thrust plate 9 and the mounting plate 1 in the middle. Therefore, the maximum size of the extended sections should not exceed the size at which there is a risk affect the performance of the brakes. When the mounting plate 1, 12 are positioned in the recesses of the end bearing plate 9, on this side of any plate is not needed. Because the mounting plate is missing, the size of the opening of the caliper can be reduced by reducing the overall size of the brake. The main goal of all manufacturers is to reduce the size of the brakes, so you can set them in their own space in different cars.

Typically, the wear of the brake pads 2 proportion the flax moving the brake pads 2 during braking and proportional force implementation braking.

To perform a caliper or the like and mounting brackets or other support pads so that the opposing forces during braking was passed in the same plane, it is important to know the location of the point of impact of the resultant of opposing forces. On the basis of the following dependencies, you can determine the point of impact for a symmetric configuration, pads and uniform distribution of the friction force.

where Heq is the perpendicular distance from the plane through the center of the brake disc, which should be the point of impact of the opposing forces to balance support for the indicator;

Ry and Ri is the radius from the center of the brake disc to the outer and inner sides respectively of the brake pads 2; and

α - the angle between the line passing through the center of the brake pads 2 and through the center of the brake disc, and the corresponding end of the brake pads 2.

As mentioned above the values indicated in figure 4.

If the point of impact of the opposing forces is inside the contact area between the mounting plates 1, 12 and a direction opposing the force perpendicular to the contact area, the fixing plate 1, 12 balanced. Here, the term "balanced" means that the mounting plates 1, 12 is not attached to Atisa tendency to rotate relative to the support plate 6. Thus, on the basis of this relationship, you can perform the support plate 6 so that the contact surface between the mounting plates 1, 12 and the caliper will be located on the optimized height.

If the above-mentioned dependence is satisfied, then the mounting plate 1, 12 will be balanced. If this dependence is not observed, then the mounting plate 1, 12 will have a tendency to wriggle out of the caliper 6 because of too little pressure contact. This trend of reversing the mounting plates 1, 12 of the caliper 6 is lowered with increasing Heq. Thus, the mounting plate 1, 12 must have their Foundation in the higher position, in order to minimize the moment, turning the mounting plate 1, 12 of the caliper 6. It should be noted that the maximum height, i.e. the maximum Heq, may be insufficient, and therefore, the clamp 13 or similar tool may be required in order not to give the mounting plates 1, 12 wriggle out of the caliper 6. And the point of impact will move as pad wear - due to temperature changes, etc. This creates additional risk that the impact point is in some cases may go beyond the area of contact, thereby attaching the mounting plates 1, 12 the tendency to turn.

The above dependence is possible FPIC is BOM optimization point of impact forces braking. The obvious option is to use the same formula that takes into account, for example, the asymmetric configuration of the pads and/or non-uniform distribution of the friction force. Other methods of optimization can be developed experimentally.

1. Disc brake, contains a caliper or similar means, executed around one or more brake discs and one or more brake pads, and the housing of the actuator brake attached to the caliper or similar means, characterized in that one or more brake pads are located on the mounting plates or other supports for brake pads and/or caliper or similar tool while caliper or similar tool and the seat pads are made with the possibility of perception of the result of opposing forces when braking in a plane perpendicular to the surface of contact between the caliper or similar means and each support pad moreover, the calculated impact point is the result of opposing forces is within the aforementioned contact surface in order to ensure the balance of the brake pads to avoid the tendency of rotation of the supports for the pads or caliper, or to the center of the brake, with the specified computed impact point protivodeystvuyushee the forces is determined using the following dependency:

where Heq is the perpendicular distance from the plane through the center of the brake disc, which is the point of impact of the opposing forces;

R and Ri is the radius from the center of the brake disc to the outer and inner sides, respectively, of the brake pads; and

α - the angle between the line passing through the center of the brake pads and through the center of the brake disc, and the corresponding end of the brake pads.

2. Disc brake according to claim 1, characterized in that the bearing (support) to pads (pads) placed (placed) in the opening of the caliper or a similar tool, with support (support) to pads (pads) has (have) extended areas for contact with the caliper or similar tool.

3. Disc brake according to claim 2, characterized in that the extended sections are in the shape of the curve in the upper plane, and in the radial direction, and referred to the shape of the curvature forms the widest part at the ends of the supports for shoes.

4. Disc brake according to claim 2, characterized in that the extended areas of support (supports) to pads (pads) located above the brake pads.

5. Disc brake according to claim 2, characterized in that the extended areas of the foot pads on the ends of the opening of the caliper or similar tools are only the "center" supportare similar tool.

6. Disc brake according to claim 1, characterized in that it has means for the perception of the horizontal components of the reaction forces.

7. Disc brake according to claim 6, characterized in that the means for the perception of the horizontal components has the form of a rod located in the hole (holes) supports (poles) to pads (pads), and the fact that each end of the rod attached to the caliper or similar tool.

8. Disc brake according to claim 7, characterized in that one end of the rod is located in the opening of the caliper or similar means, while the other end of the rod attached to the caliper or similar tool by means of the fastening means.

9. Disc brake according to claim 6, characterized in that the means for the perception of the horizontal components is made in the form of a clamp passing through holes in the support (s) to pads (pads), and attached to the caliper or similar tool.

10. Disc brake according to claim 1, characterized in that one or more brake pads are located in the recesses of the support plate or the like in part of the caliper or similar tools, the most remote from the housing of the actuator brake.



 

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