Excircle diameter testing device for axle brake shoe assembly

Abstract

The utility model relates to the technical field of axle brake shoe assembly excircle diameter inspection, and particularly discloses an axle brake shoe assembly excircle diameter inspection device, which comprises a bottom frame, a positioning inspection assembly is arranged above the bottom frame, and the positioning inspection assembly comprises a supporting disc rotationally connected to the upper end of the bottom frame. The outer wall of the supporting disc is fixedly connected with three evenly-distributed supporting blocks, the other ends of the multiple supporting blocks are provided with first electric push rods, the output ends of the first electric push rods are fixedly connected with supporting rods, the other ends of the supporting rods are fixedly connected with spherical abutting heads, and a clamping mechanism is arranged above the bottom frame. The upper end of the supporting disc is fixedly connected with a U-shaped column which is coaxially distributed with the supporting disc, the first motor drives the supporting disc to rotate at a constant rotating speed and drives the brake shoe to rotate around the axis of the U-shaped column, the rotating roller rolls along the outer circle along with the supporting disc, and if the outer circle has local protrusions or recesses, the overall uniformity of the outer circle is detected.

Description

Technical Field

[0001] This utility model relates to the field of inspection technology for the outer diameter of axle brake shoe assemblies, and specifically discloses a device for inspecting the outer diameter of axle brake shoe assemblies. Background Technology

[0002] Out-of-tolerance outer diameter of the brake shoe assembly may cause assembly interference with other axle components (such as wheel hubs and bearings), which may affect the flexibility of rotation. Therefore, a brake shoe assembly outer diameter inspection device is required.

[0003] Traditional testing methods mainly rely on manual measurement using calipers or micrometers at multiple points, which has the following drawbacks:

[0004] (1) Multiple measurements are required, manual operation is time-consuming, manual reading is prone to errors, and it is difficult to detect the overall uniformity of the outer circle.

[0005] (2) Fixed fixtures cannot be adapted to brake shoes of different specifications. Therefore, a device for inspecting the outer diameter of the axle brake shoe assembly is needed to solve this problem. Utility Model Content

[0006] This utility model proposes a device for inspecting the outer diameter of axle brake shoe assembly. Through the positioning inspection component, the diameter of brake shoes of different sizes can be detected, and the overall uniformity of the outer circle can also be detected.

[0007] This utility model is implemented as follows: a device for inspecting the outer diameter of a vehicle axle brake shoe assembly, including a base frame, with a positioning inspection component disposed on the top of the base frame;

[0008] The positioning and inspection assembly includes a support plate rotatably connected to the upper end of a base frame. Three evenly distributed support blocks are fixedly connected to the outer wall of the support plate. A first electric actuator is mounted on the other end of each support block. A support rod is fixedly connected to the output end of the first electric actuator, and a spherical contact head is fixedly connected to the other end of the support rod. A clamping mechanism is provided above the base frame. A U-shaped column, coaxially distributed with the support plate, is fixedly connected to the upper end of the support plate. A mounting base is fixedly connected to the upper end of the U-shaped column. A second electric actuator is mounted on the outer wall of the mounting base. An L-shaped frame is fixedly connected to the output end of the second electric actuator. A pressure sensor is mounted on the inner wall of the L-shaped frame. A U-shaped frame is mounted on the outer wall of the pressure sensor. A rotating roller is rotatably connected inside the U-shaped frame. A laser rangefinder is mounted on the upper end of the U-shaped frame. A reference block corresponding to the laser rangefinder is mounted inside the U-shaped column.

[0009] As a preferred embodiment of the present invention, the axle brake shoe assembly outer diameter inspection device includes a clamping mechanism comprising a drive frame disposed on the upper end of the base frame, a bidirectional lead screw rotatably connected inside the drive frame, two symmetrically distributed clamping plates threaded to the outer wall of the bidirectional lead screw, and a second motor whose output end is fixedly connected to the bidirectional lead screw at the rear end of the drive frame.

[0010] As a preferred embodiment of the present invention, a device for inspecting the outer diameter of axle brake shoe assembly is provided, wherein a first motor with its output end fixedly connected to a support plate is installed at the lower end of the base frame.

[0011] As a preferred embodiment of the axle brake shoe assembly outer diameter inspection device of this utility model, a vertical plate is fixedly connected to the upper end of the base frame, a third electric push rod is installed on the outer wall of the vertical plate, and the output end of the third electric push rod passes through the vertical plate and is fixedly connected to the drive frame.

[0012] As a preferred embodiment of the present invention, an alarm is installed on the upper end of the L-shaped frame for inspecting the outer diameter of the axle brake shoe assembly.

[0013] In a preferred embodiment of the present invention, the outer diameter inspection device for axle brake shoe assembly, wherein the distances from the plurality of spherical contact heads to the center of the support disc are equal.

[0014] As a preferred embodiment of the present invention, a controller is installed on the outer wall of the vertical plate for inspecting the outer diameter of the axle brake shoe assembly.

[0015] The beneficial effects of this utility model are:

[0016] (1) The support rod is driven to move radially by three first electric push rods, so that the spherical contact head synchronously abuts against the inner wall of the brake shoe to form a three-point adaptive positioning. The clamping mechanism is activated to clamp and fix the two ends of the brake shoe. The second electric push rod pushes the L-shaped frame to move radially, so that the rotating roller contacts the outer surface of the brake shoe with a preset pressure. The pressure sensor monitors the contact pressure in real time. The laser rangefinder emits a laser to the reference block. By measuring the change in the length of the reflected light path, the real-time distance between the rotating roller and the axis of the U-shaped column, i.e. the outer radius, is calculated. The diameter of the brake shoe can be calculated from the radius.

[0017] (2) The first motor drives the support plate to rotate at a constant speed, which drives the brake shoe to rotate around the axis of the U-shaped column. The roller rolls along the outer circle. If there are local protrusions or depressions on the outer circle, the overall uniformity of the outer circle is detected.

[0018] (3) By using the clamping mechanism in conjunction with three spherical contact heads, brake shoes of different sizes can be positioned. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is an overall structural diagram of a device for inspecting the outer diameter of a vehicle axle brake shoe assembly according to this utility model.

[0021] Figure 2 This is a top view of the structure of this utility model.

[0022] Figure 3 This is the main view of the present invention.

[0023] Figure 4 This is a partial structural diagram of the present invention.

[0024] The markings in the diagram are: 1. Base frame; 2. Vertical plate; 3. Third electric actuator; 4. Drive frame; 5. Bidirectional lead screw; 6. Second motor; 7. Clamping plate; 8. Support plate; 9. U-shaped column; 10. Mounting base; 11. Second electric actuator; 12. L-shaped frame; 13. Alarm; 14. First motor; 15. Pressure sensor; 16. U-shaped frame; 17. Laser rangefinder; 18. Reference block; 19. Support block; 20. First electric actuator; 21. Support rod; 22. Spherical contact head; 23. Rotating roller. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0026] Please see Figure 1-4 A device for inspecting the outer diameter of axle brake shoe assembly includes a base frame 1, and a positioning inspection component is provided above the base frame 1.

[0027] The positioning and inspection assembly includes a support plate 8 rotatably connected to the upper end of the base frame 1. Three evenly distributed support blocks 19 are fixedly connected to the outer wall of the support plate 8. A first electric push rod 20 is installed at the other end of the multiple support blocks 19. A support rod 21 is fixedly connected to the output end of the first electric push rod 20. A spherical contact head 22 is fixedly connected to the other end of the support rod 21. A clamping mechanism is provided above the base frame 1. A U-shaped column 9 coaxially distributed with the support plate 8 is fixedly connected to the upper end of the support plate 8. A mounting base 10 is fixedly connected to the upper end of the U-shaped column 9. A second electric push rod 11 is installed on the outer wall of the mounting base 10. An L-shaped frame 12 is fixedly connected to the output end of the second electric push rod 11. A pressure sensor 15 is installed on the inner wall of the L-shaped frame 12. A U-shaped frame 16 is installed on the outer wall of the pressure sensor 15. A rotating roller 23 is rotatably connected inside the U-shaped frame 16. A laser rangefinder 17 is installed at the upper end of the U-shaped frame 16. A reference block 18 corresponding to the laser rangefinder 17 is installed inside the U-shaped column 9.

[0028] In this embodiment: Three first electric actuators 20 are activated, causing their three output ends to move the same distance, driving the support rod 21 to move radially, so that the spherical contact head 22 simultaneously abuts against the inner wall of the brake shoe, forming a three-point adaptive positioning. The clamping mechanism is activated to clamp and fix both ends of the brake shoe. The second electric actuator 11 pushes the L-shaped frame 12 to move radially, causing the rotating roller 23 to contact the outer surface of the brake shoe with a preset pressure. The pressure sensor 15 monitors the contact pressure in real time. The laser rangefinder 17 emits a laser to the reference block 18, and by measuring the change in the length of the reflected light path, the pressure is calculated. The real-time distance between the rotating roller 23 and the axis of the U-shaped column 9 is calculated, which is the outer radius. The diameter of the brake shoe can be calculated from the radius. Then, the first motor 14 drives the support plate 8 to rotate at a constant speed, which drives the brake shoe to rotate around the axis of the U-shaped column 9. The rotating roller 23 rolls along the outer circle. If there is a local bulge or depression on the outer circle, the radial displacement of the rotating roller 23 will cause the reading of the pressure sensor 15 to fluctuate. When the fluctuation amplitude exceeds ±5%, the alarm 13 is triggered. The laser rangefinder 17 records the full circumference radius data at the same time. Combined with the rotation angle of the support plate 8, the outer circle diameter is calculated.

[0029] As a technical optimization of this utility model, the clamping mechanism includes a drive frame 4 set on the upper end of the base frame 1. A bidirectional lead screw 5 is rotatably connected inside the drive frame 4. Two symmetrically distributed clamping plates 7 are threadedly connected to the outer wall of the bidirectional lead screw 5. A second motor 6 with its output end fixedly connected to the bidirectional lead screw 5 is installed at the rear end of the drive frame 4.

[0030] In this embodiment: the second motor 6 can drive the bidirectional lead screw 5 to rotate, and when the bidirectional lead screw 5 rotates, it can drive the two clamping plates 7 to move relative to each other.

[0031] As a technical optimization of this utility model, a first motor 14 with its output end fixedly connected to the support plate 8 is installed at the lower end of the base frame 1.

[0032] In this embodiment, the support disk 8 can be driven to rotate by the first motor 14.

[0033] As a technical optimization of this utility model, a vertical plate 2 is fixedly connected to the upper end of the base frame 1, and a third electric push rod 3 is installed on the outer wall of the vertical plate 2. The output end of the third electric push rod 3 passes through the vertical plate 2 and is fixedly connected to the drive frame 4.

[0034] In this embodiment: the third electric actuator 3 can drive the drive frame 4 to move, thereby adjusting the position of the two clamping plates 7.

[0035] As a technical optimization of this utility model, an alarm 13 is installed on the upper end of the L-shaped frame 12.

[0036] In this embodiment: when the pressure sensor 15 detects that the pressure fluctuation exceeds the preset threshold, or the laser rangefinder 17 measures that the diameter is out of tolerance, the controller immediately drives the alarm 13 to issue an audible and visual alarm, prompting the operator that the current brake shoe outer diameter or shape is unqualified.

[0037] As a technical optimization of this utility model, the distances from the multiple spherical contact heads 22 to the center of the support disk 8 are equal.

[0038] In this embodiment: the distances from the multiple spherical contact heads 22 to the center of the support disk 8 are equal.

[0039] As a technical optimization of this utility model, a controller is installed on the outer wall of the vertical plate 2.

[0040] In this embodiment, the first motor 14, the second motor 6, the first electric actuator 20, the second electric actuator 11, the third electric actuator 3, the pressure sensor 15, the alarm 13, and the laser rangefinder 17 are electrically connected. The operation of the first motor 14, the second motor 6, the first electric actuator 20, the second electric actuator 11, the third electric actuator 3, the pressure sensor 15, and the alarm 13 can be controlled by the controller.

[0041] The working principle and usage process of this utility model are as follows: During use, the controller activates three first electric actuators 20, causing their three output ends to move the same distance, driving the support rod 21 to move radially. This causes the spherical contact head 22 to simultaneously abut against the inner wall of the brake shoe, forming a three-point adaptive positioning. The second motor 6 drives the bidirectional lead screw 5 to rotate. When the bidirectional lead screw 5 rotates, it drives the two clamping plates 7 to move relative to each other, clamping and fixing both ends of the brake shoe. The second electric actuator 11 pushes the L-shaped frame 12 to move radially, causing the rotating roller 23 to contact the outer surface of the brake shoe with a preset pressure. The pressure sensor 15 monitors the contact pressure in real time. The laser rangefinder 1... 7. A laser is emitted to the reference block 18. By measuring the change in the length of the reflected light path, the real-time distance between the rotating roller 23 and the axis of the U-shaped column 9, i.e., the outer radius, is calculated. The diameter of the brake shoe can be calculated from the radius. Then, the first motor 14 drives the support plate 8 to rotate at a constant speed, causing the brake shoe to rotate around the axis of the U-shaped column 9. The rotating roller 23 rolls along the outer circle. If there is a local bulge or depression on the outer circle, the radial displacement of the rotating roller 23 will cause the reading of the pressure sensor 15 to fluctuate. When the fluctuation amplitude exceeds ±5%, the alarm 13 is triggered. The laser rangefinder 17 records the full circumference radius data simultaneously. Combined with the rotation angle of the support plate 8, the outer circle diameter is calculated.

[0042] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A device for inspecting the outer diameter of axle brake shoe assembly, comprising a base frame (1), characterized in that: A positioning inspection component is provided above the base frame (1); The positioning and inspection assembly includes a support plate (8) rotatably connected to the upper end of the base frame (1). Three evenly distributed support blocks (19) are fixedly connected to the outer wall of the support plate (8). A first electric actuator (20) is installed at the other end of each support block (19). A support rod (21) is fixedly connected to the output end of the first electric actuator (20). A spherical contact head (22) is fixedly connected to the other end of the support rod (21). A clamping mechanism is provided above the base frame (1). U-shaped columns (9) coaxially distributed with the support plate (8) are fixedly connected to the upper end of the support plate (8). A mounting base (10) is fixedly connected to the upper end of the U-shaped column (9). A second electric push rod (11) is installed on the outer wall of the mounting base (10). An L-shaped frame (12) is fixedly connected to the output end of the second electric push rod (11). A pressure sensor (15) is installed on the inner wall of the L-shaped frame (12). A U-shaped frame (16) is installed on the outer wall of the pressure sensor (15). A rotating roller (23) is rotatably connected inside the U-shaped frame (16). A laser rangefinder (17) is installed at the upper end of the U-shaped frame (16). A reference block (18) corresponding to the laser rangefinder (17) is installed inside the U-shaped column (9).

2. The outer diameter inspection device for a vehicle axle brake shoe assembly according to claim 1, characterized in that: The clamping mechanism includes a drive frame (4) disposed on the upper end of the base frame (1). A bidirectional lead screw (5) is rotatably connected inside the drive frame (4). Two symmetrically distributed clamping plates (7) are threadedly connected to the outer wall of the bidirectional lead screw (5). A second motor (6) with its output end fixedly connected to the bidirectional lead screw (5) is installed at the rear end of the drive frame (4).

3. The outer diameter inspection device for a vehicle axle brake shoe assembly of claim 1, wherein: The lower end of the base frame (1) is equipped with a first motor (14) whose output end is fixedly connected to the support plate (8).

4. The outer diameter inspection device for a vehicle axle brake shoe assembly of claim 2, wherein: A vertical plate (2) is fixedly connected to the upper end of the base frame (1). A third electric push rod (3) is installed on the outer wall of the vertical plate (2). The output end of the third electric push rod (3) passes through the vertical plate (2) and is fixedly connected to the drive frame (4).

5. The outer diameter inspection device for a vehicle axle brake shoe assembly of claim 1, wherein: An alarm (13) is installed at the upper end of the L-shaped frame (12).

6. The outer diameter inspection device for a vehicle axle brake shoe assembly of claim 1, wherein: The distances from the multiple spherical contact heads (22) to the center of the support disk (8) are equal.

7. The outer diameter inspection device for a vehicle axle brake shoe assembly of claim 4, wherein: A controller is installed on the outer wall of the vertical plate (2).

Images