Brake backplate support fixture

Abstract

The present invention discloses a brake backplate support fixture, which includes a bracket, a support seat for supporting a bridge housing and installed on the bracket, a driving unit installed on the support seat, a push-pull rod and a wedge rod; the push-pull rod is connected to the inner cavity of the support seat in a relatively sliding manner along the axial direction of the bridge housing, the push-pull rod has a support end for supporting the brake backplate on the bridge housing, the support end extends out of the inner cavity of the support seat, and the push-pull rod is further provided with a pushing member; the wedge rod is located on one side of the pushing member and is connected to the inner cavity of the support seat in a relatively sliding manner along the radial direction of the bridge housing, the connecting end of the wedge rod is connected to the driving unit, and the pushing end of the wedge rod extends inward obliquely close to the outer side wall of the pushing member to form a pushing inclined surface for abutting against the pushing member. When viewed in the radial direction of the bridge housing, the projection of the pushing inclined surface intersects with the projection of the pushing member. By providing the pushing member and the wedge rod, a wedge-type force-increasing structure is formed to ensure the stable positioning of the brake backplate, thereby reducing the deformation amount of the brake backplate during drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of brake backing plate drilling, and particularly to a support fixture for a brake backing plate. Background Art

[0002] Brake backing plates on heavy vehicle axle housings usually need to be drilled. When drilling the brake backing plate, the axle housing needs to be clamped by a support fixture. The support fixture includes a base, two support seats oppositely arranged and fixed on the base, and a support assembly for supporting the brake backing plate. The two support seats are respectively used to support both ends of the axle housing. The support assembly includes a bracket fixed on the base and a positioning pin fixed on the bracket. The positioning pin is used to insert into the camshaft hole of the brake backing plate for axial positioning of the brake backing plate. However, the positioning of the brake backing plate by the support assembly of the existing support fixture is unstable, and after drilling the brake backing plate, its elastic deformation is too large, which easily causes frequent breakage of the cutting tool, not only affecting the working efficiency but also increasing the manufacturing cost. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a support fixture for a brake backing plate that can reduce the deformation amount generated when drilling the brake backing plate.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A support fixture for a brake backing plate includes a bracket, a support for supporting the axle housing and installed on the bracket, a driving unit installed on the support, a push rod and a wedge rod;

[0006] The push rod is connected to the inner cavity of the support in a relatively sliding manner along the axial direction of the axle housing. The push rod has a support end for supporting the brake backing plate on the axle housing. The support end extends out of the inner cavity of the support. The push rod is also provided with a pushing member;

[0007] The wedge rod is located on one side of the pushing member and is connected to the inner cavity of the support in a relatively sliding manner along the radial direction of the axle housing. The connecting end of the wedge rod is connected to the driving unit. The pushing end of the wedge rod extends inward obliquely near the outer side wall of the pushing member to form a pushing inclined surface for abutting against the pushing member. Looking in the radial direction of the axle housing, the projection of the pushing inclined surface intersects with the projection of the pushing member.

[0008] Further, the pushing inclined surface includes a transition inclined surface and a contact inclined surface connected to the transition inclined surface. The contact inclined surface is closer to the connecting end relative to the transition inclined surface. When the wedge rod slides towards the pushing member, the transition inclined surface and the contact inclined surface abut against the pushing member in sequence.

[0009] Further, the wedge rod is away from the support end relative to the pushing member.

[0010] Furthermore, the push rod is provided with a receiving hole penetrating the push rod in the radial direction of the axle housing. The receiving hole corresponds to the wedge rod. The pushing member is arranged in the receiving hole, and the abutting end extends into the receiving hole and abuts against the abutting inclined surface.

[0011] Furthermore, the pushing member is a roller, and the roller is rotatably connected to the receiving hole through a wheel axle.

[0012] Furthermore, the inner cavity of the support includes a first chamber and a second chamber. The first chamber communicates with the second chamber and penetrates the support along the axial direction and the radial direction of the axle housing respectively. The push rod and the wedge rod are respectively slidably fitted in the first chamber and the second chamber.

[0013] Furthermore, the driving unit is a cylinder. The cylinder is fixed on the outer side wall of the support away from the axle housing and corresponds to the wedge rod. The telescopic rod of the cylinder extends into the inner cavity of the support and is connected to the connecting end.

[0014] Furthermore, it includes a bottom plate. The bracket is installed on the top surface of the bottom plate. A chute is provided on the plate surface of the bracket corresponding to the support. The chute extends in the up and down direction. The support is slidably fitted with the chute through a sliding member; a support screw is connected to the end surface of the supporting end, a pull nail is provided at the reset end of the push rod, a spring is sleeved on the pull nail, and the spring is connected to the support and the pull nail.

[0015] By arranging the pushing member and the wedge rod on the push rod of the brake backing plate support fixture of the present invention, the pushing member is used to abut against the abutting inclined surface of the wedge rod, that is, the pushing member and the wedge rod form a wedge-type force-increasing structure, so that the brake backing plate support fixture has good self-locking property, rigidity and safety, ensures stable positioning of the brake backing plate, and can reduce the deformation amount of the brake backing plate during drilling. The brake backing plate support fixture of the present invention also has the characteristics of simple structure and low cost. Description of the Drawings

[0016] Figure 1 is the front view of the brake backing plate support fixture of the present invention;

[0017] Figure 2 Figure 1 is the sectional view taken along the A-A direction of;

[0018] Figure 3 is the enlarged view of the partial B of 2;

[0019] Figure 4 is Figure 1 the three-view drawing of the support of;

[0020] Figure 5 is Figure 1Three-view drawings of the push rod

[0021] Figure 6 For Figure 1 Three-view drawings of the wedge rod Specific implementation manners

[0022] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described:

[0023] As Figures 1 to 6 shown, the present invention provides a brake backing plate support fixture, which is installed on a machine tool (not shown) and is used to position the brake backing plate 101 during drilling of the brake backing plate 101 of a heavy vehicle (truck or trailer) axle housing 100. In this embodiment, there are two groups of brake backing plate support fixtures, and the two groups of brake backing plate 101 fixtures are respectively located on opposite sides of the axle housing 100. The brake backing plate support fixture includes a bottom plate 5, a bracket 1 installed on the top surface of the bottom plate 5, a support 2 for supporting the axle housing 100 and installed on the bracket 1, a drive unit 3 installed on the support 2, a push rod 4 and a wedge rod 5, and the push rod 4 and the wedge rod 5 are installed on the support 2.

[0024] As Figure 1 、 Figure 3 shown, the plate surface of the bracket 1 corresponding to the support 2 is provided with a chute 11 and a relief groove 12 for the push rod 4 to pass through corresponding to the push rod 4, and the chute 11 and the relief groove 12 extend in the up and down direction. The support 2 is slidably matched with the chute 11 through a sliding member 25 to adjust the position of the push rod 4 relative to the brake backing plate 101, which can expand its usage range. The relief groove 12 is in clearance fit with the push rod 4. Among them, the sliding member 25 is a T-shaped screw. As Figure 4 shown, the inner cavity of the support 2 includes a first chamber 21 and a second chamber 22. The first chamber 21 communicates with the second chamber 22 and respectively penetrates through the support 2 along the axial direction and the radial direction of the axle housing 100. As Figure 2 、 Figure 3 shown, in order to improve the positioning accuracy, in this embodiment, the first chamber 21 and the second chamber 22 are respectively tightly fitted with a first bushing 23 and a second bushing 24. The first bushing 23 and the second bushing 24 respectively cover the first chamber 21 and the second chamber 22. The part where the second bushing 24 passes through the first bushing 23 and intersects with the first bushing 23 forms an intersection space (not labeled), and the intersection space communicates with the first bushing 23 and the second bushing 24.

[0025] As Figure 1 、 Figure 2 shown, the drive unit 3 is a cylinder. The cylinder is fixed to the outer wall of the support 2 away from the axle housing 100 by screws and corresponds to the wedge rod 5. The telescopic rod 31 of the cylinder extends into the inner cavity of the support 2 and is connected to the connection end 51 by screws.

[0026] As Figure 3, Figure 5 As shown, the push rod 4 is connected to the inner cavity of the support 2 in a relatively sliding manner along the axial direction of the axle housing 100. Specifically, the push rod 4 is slidably fitted in the first chamber 21. More specifically, the push rod 4 is slidably fitted with the inner wall of the first bushing 23. The push rod 4 has a support end 41 for supporting the brake backing plate 101 on the axle housing 100 and a reset end 45 opposite to the support end 41. The support end 41 extends out of the inner cavity of the support 2. The push rod 4 is further provided with a pushing member 42. In this embodiment, the push rod 4 is provided with a receiving hole 40 penetrating through the push rod 4 in the radial direction of the axle housing 100. The receiving hole 40 corresponds to the wedge rod 5. The pushing member 42 is arranged in the receiving hole 40, and the pushing end 52 extends into the receiving hole 40 and abuts against the abutting inclined surface 521. The pushing member 42 is a roller, and the roller is rotatably connected to the receiving hole 40 through a wheel shaft 43 to form a rolling contact with the abutting inclined surface 521, which can reduce the frictional force. The end face of the support end 41 is connected with a support screw 44. The setting of the screw facilitates adjusting the length of its extension out of the inner cavity of the support 2 in the axial direction of the axle housing 100 to adapt to the positioning of the brake backing plates 101 of axle housings 100 of different sizes and specifications. The reset end 45 is provided with a pull stud 46, and a spring 47 is sleeved on the pull stud 46. The spring 47 is connected to the support 2 and the pull stud 46. The settings of the spring 47 and the pull stud 46 realize the reset of the push rod 4.

[0027] As Figure 3 , Figure 4 shown, the wedge rod 5 is connected to the inner cavity of the support 2 in a relatively sliding manner along the radial direction of the axle housing 100. The wedge rod 5 is away from the support end 41 relative to the pushing member 42 and is located on one side of the pushing member 42. Specifically, the wedge rod 5 is slidably fitted in the second chamber 22. More specifically, the wedge rod 5 is slidably fitted in the second bushing 24. The connecting end 51 of the wedge rod 5 is connected to the driving unit 3 through a screw. The pushing end 52 of the wedge rod 5 extends inwardly and obliquely near the outer wall of the pushing member 42 to form an abutting inclined surface 521 for abutting against the pushing member 42. Looking at the axle housing 100 in the radial direction, the projection of the abutting inclined surface 521 intersects with the projection of the pushing member 42. Specifically, the abutting inclined surface 521 includes a transition inclined surface 5211 and a contact inclined surface 5212 connected to the transition inclined surface 5211. The contact inclined surface 5212 is closer to the connecting end 51 than the transition inclined surface 5211.

[0028] When the support end 41 supports the brake backing plate 101, the telescopic rod 31 of the air cylinder drives the wedge rod 5 to slide towards the roller. When the wedge rod 5 moves from the initial position (such as Figure 3When the push-pull rod 4 is slid to the position where the abutting inclined surface 521 shown by the dashed line abuts against the roller, the push-pull rod 4 is driven to move outward by the roller, so that the supporting end 41 is positioned and supports the brake bottom plate 101 in the axial direction to offset the external force acting on the brake bottom plate 101 by the drilling tool. That is, the pushing member 42 and the wedge rod 5 form a wedge-type force-increasing structure, so that the brake bottom plate support fixture has good self-locking property, rigidity and safety and a simple structure, ensuring stable positioning of the brake bottom plate 101, reducing the deformation amount of the brake bottom plate 101 during drilling. Since the bracket 1 has sufficient rigidity, the deformation is less than 0.1 mm under a force of 1 ton. In addition, the service life of the drilling tool can be improved. Among them, the supporting end 41 and the drilling tool are respectively located on opposite sides of the part to be drilled on the brake bottom plate 101 in the axial direction of the axle housing 100, and the supporting end 41 and the drilling tool are arranged in a staggered manner. During the contact process between the wedge rod 5 and the abutting inclined surface 521, the roller first contacts the transition inclined surface 5211, and then the roller gradually transitions from the transition inclined surface 5211 to the contact inclined surface 5212 to ensure smooth movement, and the abutting end 52 can pass through the push-pull rod 4 from the intersection space.

[0029] In the brake bottom plate support fixture of the present invention, the push-pull rod is provided with a pushing member and a wedge rod. The pushing member is used to abut against the abutting inclined surface of the wedge rod. That is, the pushing member and the wedge rod form a wedge-type force-increasing structure, so that the brake bottom plate support fixture has good self-locking property, rigidity and safety, ensuring stable positioning of the brake bottom plate and reducing the deformation amount of the brake bottom plate during drilling. The brake bottom plate support fixture of the present invention also has the characteristics of simple structure and low cost.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Brake backing plate support fixture, characterized in that, It includes a bottom plate, a bracket, a support for supporting the axle housing and mounted on the bracket, a drive unit mounted on the support, a push rod and a wedge rod; The bracket is mounted on the top surface of the bottom plate. A chute is provided on the plate surface of the bracket corresponding to the support, and a relief groove for the push rod to pass through is provided corresponding to the push rod. The chute and the relief groove extend in the vertical direction. The relief groove is in clearance fit with the push rod, and the support is slidably fitted with the chute through a sliding member; The push rod is slidably connected in the inner cavity of the support along the axial direction of the axle housing. The push rod has a support end for supporting the brake bottom plate on the axle housing. The support end extends out of the inner cavity of the support. A support screw is connected to the end face of the support end. A pull pin is provided at the reset end of the push rod. A spring is sleeved on the pull pin. The spring is connected to the support and the pull pin. The push rod is also provided with a pushing member; The wedge rod is located on one side of the pushing member and is slidably connected in the inner cavity of the support along the radial direction of the axle housing. The connecting end of the wedge rod is connected to the drive unit. The pushing end of the wedge rod extends inward obliquely near the outer side wall of the pushing member to form a pushing inclined surface for abutting against the pushing member. Looking in the radial direction of the axle housing, the projection of the pushing inclined surface intersects with the projection of the pushing member.

2. The brake backplate support fixture according to claim 1, wherein The pushing inclined surface includes a transition inclined surface and a contact inclined surface connected to the transition inclined surface. The contact inclined surface is closer to the connecting end than the transition inclined surface. When the wedge rod slides towards the pushing member, the transition inclined surface and the contact inclined surface abut against the pushing member in sequence.

3. The brake backplate support fixture according to claim 1, wherein The wedge rod is farther from the support end relative to the pushing member.

4. The brake backplate support fixture according to claim 1, wherein, The push rod is provided with a receiving hole penetrating the push rod in the radial direction of the axle housing. The receiving hole corresponds to the wedge rod. The pushing member is arranged in the receiving hole. The pushing end extends into the receiving hole and abuts against the pushing inclined surface.

5. The brake backplate support fixture according to claim 4, characterized in that, The pushing member is a roller. The roller is rotatably connected in the receiving hole through a wheel axle.

6. The brake backplate support fixture according to claim 1, characterized in that, The inner cavity of the support includes a first chamber and a second chamber. The first chamber is communicated with the second chamber and penetrates the support along the axial direction and the radial direction of the axle housing respectively. The push rod and the wedge rod are slidably fitted in the first chamber and the second chamber respectively.

7. The brake backplate support fixture according to claim 1, wherein The drive unit is a cylinder. The cylinder is fixed on the outer side wall of the support away from the axle housing and corresponds to the wedge rod. The telescopic rod of the cylinder extends into the inner cavity of the support and is connected to the connecting end.

Images