Disk brake with shorter lining

FIELD: transport.

SUBSTANCE: proposed brake comprises housing and actuator assembly. Housing comprises pad with pad arm. Actuator assembly comprises actuator and element with brake block arranged to translate along motion axis. Said block is fitted on said element to move on support with pressure spring. Pressure spring serves to generate pressure force FR between brake block and surface of fit in housing pad. Pressure spring fit surface is located antiparallel with motion axis. Note here that angle α between fit surface and motion axis exceeds 0°.

EFFECT: better ventilation of brake blocks.

9 cl, 3 dwg

 

The invention relates to a disk brake with short lining, in particular automotive brake housing comprising a fork (the bridge), the first shoulder of the housing, support, drive, and second, the external shoulder of the housing. On the inner sides of each of the shoulders of the casing is fixed on one brake Shoe consisting of a skeleton and the friction acting on the brake disc. Housing and brake pads fixed relative to the vehicle bracket can be moved along the axis of action of the actuator. Drive side between the brake pad and the surface it fit in the bridge of the body are provided clamping spring clamping pad between the bracket and the contact surface, to avoid knocking pads on the surface of the vibration.

In German patent DE 2558141 A1 describes a corresponding disc brake with partial coverage, the drive of which is the cylinder with the piston. When pressing on the brake pedal the piston out of the cylinder and pushes the brake pad from the piston to the brake disk, while the pad is in contact with the disk. Then the cylinder with the piston or the shoulder of the body of the piston removed from the drive and pull the opposite shoulder of the housing in the direction of the corresponding side of the drive. Thus, the disk is pressed and W heaven brake pad, and both pads affect the disk with a force that is oriented perpendicular to it. When the brake pedal is released, pressure in the cylinder with the piston disappears, and pads over to the disk are not crushed. However, they are still fit to drive and due to friction form the so-called residual braking torque. In addition, the friction linings are subjected to considerable thermal load, because between the pads and the disc does not include current of air, and the pads are not fragmented disk thermally.

Based on the foregoing, the object of the invention is to provide disc brakes with short lining and a clamping spring, which has the best ventilation parameters of brake pads, i.e. with decreasing residual torque, as well as with thermal separation pads and disk.

According to the invention the task is solved with the surfaces of the presser springs in the bridge housing antiparallel to the axis of movement, along which moves the movable element of the actuator. Thus there is not only radially directed force which presses the brake pad to the bracket, but also perpendicular to it component of the force. It helps reverse the movement of the brake pads and the movable part of the actuator away from the brake disk, which improves ventilation as between the block and the disk occurs n is a large gap.

Appropriate execution of the invention, in which between the contact surface and the axis of movement provided the angle α greater than 0°, and this angle is in the plane defined by the axis of motion and the vector resultant of the elastic force FF. As a result, the spring, in addition to the radial pressing force FRcreates an axial component of force FXparallel to the axis of movement, returns the piston and located on the side of the piston brake pad to its original position, which improves ventilation.

It turned out that component of FXparallel to the axis of motion, is particularly effective in terms of ventilation, when the angle α exceeds about 1.5°.

In a particularly favorable form of the invention the angle α limit interval between 1.5° and 11°. If the angle α exceeds 11°, radial force FRpressing the brake pads so strongly decreases due to the increasing part of FXparallel to the axis of motion that the operating mode becomes unfavorable.

Due to the combination of materials presser spring and bridge housing and environmental conditions, the contact area between the pressure spring and the contact surface exposed to significant corrosion. So it makes sense that between the pressure spring and the contact surface was provided, at least one is red, scatter plot of contact to keep the corrosive element to the possible minimum and the corresponding reduction of corrosion.

For convenience of manufacture described brake disc contact surface and the bridge body perform whole. Due to the fact that the contact surface and the bridge body is made in one casting operation, it is possible to avoid additional costs in production.

In another suitable implementation of the invention the contact surface and the bridge housing made of several parts. Such a performance in the selection of appropriate materials ensures slow wear and/or corrosion of the contact surfaces and springs, which reaches either very hard or corrosion resistant materials.

Also advantageous in terms of cost of production to be used as a compression spring wire or leaf spring, because due to the simplicity of their design can be obtained in large quantities.

Particularly illustrative of the advantages of the invention in the case of hydraulic or Electromechanical actuators. Because hydraulic often allow a lot of movement in only one direction, the force that tells the return movement of the piston and brake pad, there is no as such, through the I which the axial component of F Xelastic efforts FFaimed at the return, plays a crucial role in the functionality of the brakes. When using Electromechanical actuator component FXthere is a special need, if the drive fails and is unable to pull the block to its original position.

Other details of the invention are readily available from the accompanying description of the drawing.

The drawing shows:

figure 1 - the first form of execution of the invention in section through a disc brake with short lining along the line II-II,

figure 2 is another view of the above form in cross section along the line I-I, and

figure 3 is a view in perspective [axonometric projection] disc brakes with short lining according to another form of execution in which the contact surfaces are performed separately.

In figures 1 and 2 show a first form of performance disc brakes with short plates 1 in two sections. Disc brake with short lining 1 includes a housing 2 consisting of a first shoulder of the housing 6, bridge (plug) housing 3 and the second located closer to the outer side of the vehicle on the shoulder of the housing 7. In this form of execution in the first shoulder of the housing 6 includes a unit of a piston and cylinder 4, 5 and the piston 4 is attached and secured on the frame 8 of the brake pads 21 of friction the th plate 9. On the external shoulder of the housing 7 is provided another brake pad 22 to the frame 10 and the lining 11. The brake pads 21, 22 act on the part not shown in the drawing the brake disc. The case 2 and the brake pads 21, 22, or their frames 8, 10 are mounted on the shoulders 27, 28 of the bracket 12 parallel to the axis of movement 13 of the block, the piston and cylinder 4, 5 with the possibility of a shift, the housing 2 with the shoulder 6 on the side of the piston by two bolts 20, 25, threaded into the bracket 12. Spring 26 pulls the outer shoulder of the housing 7 to the shoulders 27, 28 of the bracket (figure 3), allowing the brake pad 22 is clamped between the shoulders 27, 28 of the bracket 12 and the bridge of the housing 3. Similarly, the brake pad 21 is also supported by the frame 8 on the shoulders 27, 28 of the holder 12 with the ability to shift. Avoid knocking the pads with vibration and damage to the pads 21 between the shoulders 27, 28 and bridge housing 3 lay on the pressure spring 14. In this example, the execution of it is fixed in the clamping device 29 on the frame 8 of the brake pads 21 and presses the two spring shoulders 30, 31 on the two support surfaces 15, 16. Between spring shoulders 30, 31 and the surfaces 15, 16 there is only point contact 17, 32, in order to minimize the resulting corrosion of the element. The contact surfaces 15, 16 are located relative to the axis of movement 13 of the cylinder b is a CMOS 4, 5 at an angle α, and the angle α lies in the plane defined by the axis movement and the resultant vector on the clamping device of the elastic force FF. Due to this elastic force FFprovides radial pressure component of FRperpendicular affecting the shoulders 27, 28 of the bracket 12. In addition, there is parallel to the axis of movement 13 of the axial component of the force is FXacting on the piston 4 and the brake Shoe 21. It should be noted that the bracket 12 is provided directly to the suspension or wheel on the front suspension of the car and is one piece with it.

Possible forms of execution, in which on the bridge of the housing 3 is provided as only one or several surfaces. Accordingly, the presser spring should also be made so that in cooperation with one or more surfaces to form parallel to the axis of movement 13 of the block, the piston and cylinder 4, 5 axial component of FXthe elastic force FF. When creating one or more surfaces of the decisive factor is only their tilt at a certain angle α to the axis of movement 13, so that they work as axial bevels, and the angle α lies in the plane defined by the axis of motion (13) and the vector resultant of the elastic force FF.

In figure 3 depict the of Allen perspective view of the disk brake with short lining 1 according to another form of execution, in which the contact surfaces 15, 16 are made as parts 18, 19. In addition to the frame 8 from the side of the piston, the brake pads do not display to improve visibility. You can see how the housing 2 with the shoulder of the housing 6 is fixed with the ability to shift on the bracket 12 by means of bolts 20 and 25, and the brake pads are squeezed between the surfaces 15, 16 of the bridge of the housing 2 and the shoulders 27, 28 of the bracket 12. On figure 3 the whole brake pad 21 is only the frame 8 adjacent to the shoulders 27, 28. In the clamping device 29 of the frame 8 is fixed to the spring 14, which two spring shoulders 30, 31 creates the frame 8 is supported on two support surfaces 15, 16, or on the parts 18, 19 and presses it against the shoulders 27, 28 of the bracket 12. Items 18, 19 screwed to the bridge housing by screws 23, 24. There are, however, other methods of fixation, such as a connection circuit form, friction, material or other, while they do not change the invention. It is only important that the contact surfaces are formed as separate parts, in cooperation with the presser spring 14 forming the axial component of the force FX.

Disc brake with short lining 1 operates as follows. Between the housing 2 and the bracket 12 posted by brake pads 21, 22, and the pressing spring 14 presses the brake pad 21 from the surfaces 15, 16 and avoid is brazii presses it to the shoulders 27, 28 of the bracket 12. Due to the angle α of the contact surfaces 15, 16 of the elastic efforts FFcompression spring 14 in addition to the radial clamping force FRis formed by the axial component of the force is FXparallel to the axis of movement 13. When pressing on the brake pedal in the block, the piston and cylinder 4, 5 occurs excessive hydraulic pressure which pushes the piston 4 of the cylinder 5. Consequently, the brake pad 21 is moved to the brake disk, while its plate 9 will not kiss him. In the result, already the cylinder with the piston 4, 5 or shoulder of the body of the piston 6 to move away from the disk and pull through the bridge of the housing 3 opposite the shoulder of the housing 7 in the direction of the corresponding side of the brake disc. Thus the disk is pressed and the second brake pad 22 and the two pads 21, 22 act on the part of the disk surface with a force that is oriented perpendicularly. When the brake pedal is released, pressure in the cylinder with the piston 4, 5 disappears, and parallel to the axis of movement 13 of the axial component of FXthe elastic force FFpushes the piston 4 and the brake pad 21 of the brake disc to its original position. Thus, the reach of the termination of friction of the brake pads 21 of the brake disc at the end of braking and avoid unwanted residual braking torque. Uh what about decisively improves the ventilation of the brakes.

The list of designations

1 Disc brake with short lining

2 Case

3 Bridge (plug) housing

4 Piston

5 Cylinder

6 First, the internal shoulder of the body

7 Second, the external shoulder of the body

8 Frame

9 Friction pad

10 Frame

11 Friction pad

12 Bracket

13 the Axis of motion

14, the presser spring

15 the contact Surface

16, the contact Surface

17 Point contact surface

18 Hinged item

19 Hinged item

20 Bolt

21 Brake pad

22 Brake pad

23 Screw

24 Screw

25 Bolt

26 Spring

27 Shoulder bracket 12

28 the Shoulder of the bracket 12

29 Clamping device

30 Shoulder spring

31 Shoulder spring

32-Point contact surface

α Angle

FFThe resultant elastic force on the clamping device 29

FRRadial clamping force

FXAxial component of the elastic force FF

1. Disc brake with short plates (1) with a housing (2), bridge housing (3), with at least one shoulder of the housing (6), the actuating element (4, 5), which includes the actuator (5) and mounted for movement along the axis of motion (13) item (4), at least one brake Shoe (21)placed on the element (4) and movably mounted on at mereoni support (27, 28), with the presser spring (14)that generates between the brake pad (21) and at least one contact surface (15, 16) in the bridge housing (3) clamping force FRand compresses thus brake pad (21) with a support (27, 28), characterized in that the contact surface (15, 16) compression spring (14) is antiparallel to the axis of motion (13), and the angle α between the contact surface (15, 16) and a pivot (13) is greater than 0°.

2. Disc brake with short lining according to claim 1, characterized in that the angle α is in the plane defined by the axis of motion (13) and the vector rezultirase elastic force FF.

3. Disc brake with short lining according to claim 1, characterized in that the angle α of approximately 1.5°.

4. Disc brake with short lining according to any one of claims 1 to 3, characterized in that the angle α is approximately 1.5 to 11°.

5. Disc brake with short lining according to claim 1, characterized in that at least one contact surface (17, 32) between the pressure spring (14) and contact surface (15, 16) in the bridge housing (3) has the form of a point.

6. Disc brake with short lining according to claim 1, characterized in that the contact surface (15, 16) and the bridge body (3) made as a single item.

7. Disc brake with short lining according to claim 1, characterized in that the contact surface (15, 16) is formed of at least one attached detail (18, 19).

8. Disc brake with short lining according to claim 1, characterized in that the pressure spring (14) is designed as a wire or leaf spring.

9. Disc brake with short lining according to claim 1, characterized in that the actuating unit (4, 5) are mainly based on hydraulic or Electromechanical principle.



 

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