Wrench for brake-shoe lash adjuster

Abstract

The utility model provides a brake-shoe lash adjuster wrench which comprises a shell, and the shell is provided with a shaft sleeve arranged at one end of the shell and provided with a clamping block extending in the axial direction and a clamping groove used for being connected with the side wall of an adjusting nut in a clamping mode; the gear motor is arranged at the other end of the shell and drives the shaft sleeve to rotate through a transmission assembly. The device has the advantages that the speed reduction motor drives the shaft sleeve to rotate so as to drive the adjusting nut to rotate, operation is easy, and labor is saved; and 2, by replacing the shaft sleeve, the brake shoe gap adjusting device can meet the gap adjusting requirements of brake shoes of different models.

Description

Technical Field

[0001] This utility model relates to the technical field of brake shoe clearance adjusters, specifically a brake shoe clearance adjuster wrench. Background Technology

[0002] Brake shoe clearance adjusters are used to adjust the clearance between the brake shoes and wheels of railway vehicles, ensuring proper brake shoe operation and improving braking performance. The clearance between the brake shoes and wheels is adjusted by turning the adjusting nut in the brake shoe clearance adjuster.

[0003] Manually turning the adjusting nut directly not only requires little operating space but also involves a large torque, making it quite laborious. Therefore, a wrench is generally used for this purpose. A traditional wrench consists of a hinged locking part and a handle. The locking part is first engaged with the adjusting nut, and then the nut is rotated by pushing or pulling the handle along its length. While this method is less strenuous than purely manual adjustment, the distance between the adjusting nut's axis and the hinge point of the handle is relatively small, making it still quite difficult to apply force. Increasing the distance between the adjusting nut's axis and the hinge point of the handle would result in a handle that is too high, making it difficult for the worker to apply force.

[0004] Therefore, how to achieve convenient operation and reduce the pushing and pulling force applied by the worker when driving the adjusting nut to rotate has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To address the technical problems in the background art, this utility model discloses a brake shoe gap adjuster wrench.

[0006] This utility model provides a brake shoe clearance adjuster wrench, including a housing, on which the following are mounted:

[0007] A bushing, located at one end of the housing, is provided with an axially extending locking block for engaging the groove on the side wall of the adjusting nut;

[0008] A geared motor is located at the other end of the housing and drives the bushing to rotate via a transmission assembly.

[0009] The beneficial effects of the above settings are: 1. The shaft sleeve is driven to rotate by the geared motor, which in turn drives the adjusting nut to rotate, which is not only simple to operate but also saves effort; 2. By replacing the shaft sleeve, this utility model can be applied to the adjustment needs of different models of brake shoe gaps.

[0010] The transmission assembly specifically includes a meshing driving gear and a driven gear; the drive end of the geared motor is fixedly connected to the driving gear; and the bushing is coaxially fixedly connected to the driven gear.

[0011] Direct meshing of the driving and driven gears can cause the geared motor to be too close to the adjusting nut, resulting in a collision. Therefore, a further improvement involves using two symmetrically arranged intermediate gears to mesh between the driving and driven gears. These two symmetrically arranged intermediate gears also limit the rotation of the driven gear, making its rotation more stable.

[0012] The geared motor is directly connected to the drive gear, and the axis of the geared motor coincides with the axis of the drive gear. As a result, the geared motor protrudes from one end of the housing, which increases the size of the housing, increases the cost, and occupies more space. Based on this, a further improvement is made by connecting the drive end of the geared motor to a drive bevel gear; the drive bevel gear meshes perpendicularly with a driven bevel gear; and the driven bevel gear is coaxially and fixedly connected to the drive gear.

[0013] Using a mechanical structure to fix the housing is not only costly but also structurally complex. Therefore, a further improvement is made: a handle is installed at the other end of the housing; the handle extends away from the geared motor. With this design, when the geared motor starts, only the handle needs to be held by hand, simplifying the housing structure and making operation more convenient.

[0014] The handle is usually welded to the housing, which is quite cumbersome to disassemble and assemble. Based on this, a further improvement is made: a U-shaped clamp is set at one end of the handle; the clamp is clamped to the housing, and the bolt passes through the clamp and is threaded to the housing.

[0015] Because the adjusting nut has fixed pull rods at both ends, when the bushing engages the adjusting nut, the pull rods need to be removed first, and after installing the bushing, the pull rods need to be reinstalled. This process of removing and reinstalling the pull rods after adjustment is cumbersome. Therefore, a further improvement is made: the bushing has a U-shaped first groove; the drive gear has a U-shaped second groove; the first and second grooves are identical in shape and have the same opening direction, used to engage the pull rod on one side of the adjusting nut. With this design, simply moving the housing radially along the bushing engages the pull rod in the first and second grooves, and then moving the housing axially along the bushing engages the adjusting nut, making the operation simple and convenient.

[0016] If the bushing and driven gear are located on the outside of the housing, the overall structure of this utility model will be longer, and the driven gear will be more prone to corrosion and rust. Based on this, a further improvement is made in that the driven gear is located inside the housing; a U-shaped third slot is provided at one end of the housing, and the slot width is greater than that of the first slot.

[0017] The radial clearance generated when the bushing rotates directly affects the accuracy of the bushing rotation and the stability of the drive adjusting nut rotation. Based on this, a further improvement is made by installing multiple evenly distributed rollers on the housing, which are rotatably connected to the outer wall of the bushing.

[0018] The roller is rotatably connected by a bearing. If the roller is located outside the housing, dust and moisture can easily enter the bearing, affecting its normal use and shortening its service life. Therefore, a further improvement is made: the roller is installed inside the housing; a coaxial connecting shaft is fixedly connected between the bushing and the driven gear; the connecting shaft is provided with a U-shaped fourth slot, which has the same shape as the first slot and the same opening direction as the first slot.

[0019] The advantages of this utility model are: 1. The shaft sleeve is driven to rotate by the geared motor, which in turn drives the adjusting nut to rotate. This not only makes the operation simple but also saves effort; 2. By replacing the shaft sleeve, this utility model can be applied to the adjustment needs of different models of brake shoe gaps. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a structural schematic diagram from another perspective of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the hidden bottom shell of this utility model;

[0025] In the diagram: 1. Housing; 2. Bushing; 3. Gear motor; 4. Driven gear; 5. Intermediate gear; 6. Driven bevel gear; 7. Handle; 8. Clamping plate; 9. Roller; 10. Connecting shaft; 11. Third slot; 20. Drive gear; 21. First slot; 22. Clamping block; 30. Drive bevel gear; 101. Fourth slot; 41. Second slot. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] like Figure 1-4 As shown, this utility model discloses a brake shoe gap adjuster wrench, including a housing 1. The housing 1 includes a bottom shell with an opening at one end and a cover plate covering the opening end of the bottom shell, which is locked and fixed by bolts.

[0028] A driven gear 4 and a connecting shaft 10 are provided at one end inside the housing 1, and a bushing 2 is provided on the outer side of the bottom housing. The bushing 2, the connecting shaft 10, and the driven gear 4 are coaxially fixedly connected in sequence by bolts. Three rotationally symmetrical locking blocks 22 extend radially from the outer end face of the bushing 2 for engaging the locking grooves on the outer side wall of the adjusting nut.

[0029] A geared motor 3 is installed at the other end of the housing 1, and its drive end is connected to a drive bevel gear 30. The drive bevel gear 30 is perpendicularly meshed with a driven bevel gear 6. Inside the housing 1, there is also a drive gear 20 that is coaxially and fixedly connected to the driven bevel gear 6.

[0030] Two intermediate gears 5 mesh between the driving gear 20 and the driven gear 4. The intermediate gears 5 are symmetrical with respect to the line connecting the centers of the driving gear 20 and the driven gear 4. The intermediate gears 5 not only increase the distance between the driven gear 4 and the driving bevel gear 30 to prevent the driving bevel gear 30 from colliding with the bushing 2 when the adjusting bolt is engaged, but also limit the rotation of the driven gear 4, making the rotation of the driven gear 4 more stable.

[0031] The arrangement of the driving bevel gear 30 and the driven bevel gear 6 makes the geared motor 3 parallel to the housing 1, thereby reducing the volume of the housing 1, lowering the cost, and reducing the space occupied by this utility model.

[0032] The radial clearance generated when the bushing 2 rotates directly affects the accuracy of the bushing 2 rotation and the stability of the drive adjusting nut rotation. Therefore, multiple evenly distributed rollers 9 are also installed inside the housing 1, which are rotatably connected to the outer wall of the bushing 2.

[0033] In this embodiment, the driving gear 20, driven gear 4, and intermediate gear 5 are housed within the housing 1 to prevent corrosion. The roller 9 rotates via bearings; housing the roller 9 within the housing 1 prevents dust and moisture from entering the bearings, affecting their normal operation and reducing their lifespan. A cover is also installed on the housing 1 to cover the geared motor 3, driving bevel gear 30, and driven bevel gear 6, similarly preventing dust and moisture from affecting them.

[0034] A support plate is also installed on the housing 1 to house the battery and power the geared motor 3, thus preventing the geared motor 3 from being connected to the circuit board on the wall via a cable, which would affect the operation of the wrench.

[0035] Because the adjusting nut has fixed tie rods at both ends, when the bushing 2 engages with the adjusting nut, the tie rods need to be removed first. After installing the bushing 2, the tie rods need to be reinstalled. The process of removing and reinstalling the tie rods is repeated after adjustment, making the operation quite cumbersome. Therefore, if... Figure 2As shown, the bushing 2 is provided with a U-shaped first groove 21; the drive gear 20 is provided with a U-shaped second groove 41; and the connecting shaft 10 is provided with a U-shaped fourth groove 101. The first groove 21, the second groove 41, and the fourth groove 101 have the same shape and the same opening direction, and are used to engage the pull rod on one side of the adjusting nut. With this configuration, it is only necessary to first move the housing 1 radially in the bushing 2 to engage the pull rod with the first groove 21, the second groove 41, and the fourth groove 101, and then move the housing 1 axially in the bushing 2 to engage the bushing 2 with the adjusting nut. The operation is simple and convenient.

[0036] If the bushing 2 and the driven gear 4 are set on the outside of the housing 1, not only will the overall structure of this utility model be longer, but the driven gear 4 will also be more prone to corrosion and rust. Therefore, the driven gear 4 is set inside the housing 1. A U-shaped third slot 11 is provided at one end of the housing 1, and its slot width is greater than that of the first slot 21.

[0037] Using a mechanical structure to fix the housing 1 is not only costly but also structurally complex. Therefore, a cylindrical handle 7 is installed at the other end of the housing 1; the handle 7 extends away from the geared motor 3. With this configuration, when the geared motor 3 is started, only the handle 7 needs to be held by hand, which not only simplifies the structure of the housing 1 but also makes operation more convenient. Radially pushing the handle 7 can also increase the rotation speed of the adjusting nut.

[0038] The specific installation structure of the handle 7 is as follows: a U-shaped retaining plate 8 is provided at one end of the handle 7; the retaining plate 8 is engaged with the housing 1, and bolts pass through the retaining plate 8 and are threadedly connected to the housing 1. This facilitates the assembly and disassembly of the handle 7.

[0039] Compared with the prior art, the beneficial effects of this embodiment are: 1. The shaft sleeve 2 is driven to rotate by the geared motor 3, thereby driving the adjusting nut to rotate, which is not only simple to operate, but also saves effort; 2. By replacing the shaft sleeve 2, this utility model can be applied to the adjustment needs of different models of brake shoe gaps.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A brake shoe gap adjuster wrench characterized by, Includes a housing (1), on which are mounted: A bushing (2) is provided at one end of the housing (1) and is provided with an axially extending locking block (22) for engaging the locking groove of the side wall of the adjusting nut; A geared motor (3) is located at the other end of the housing (1) and drives the bushing (2) to rotate through a transmission assembly.

2. The brake shoe gap adjuster wrench of claim 1, wherein: The transmission assembly includes a meshing drive gear (20) and a driven gear (4). The drive end of the geared motor (3) is fixedly connected to the drive gear (20); The bushing (2) is coaxially and fixedly connected to the driven gear (4).

3. The brake shoe gap adjuster wrench of claim 2, wherein: Two symmetrically arranged intermediate gears (5) mesh between the driving gear (20) and the driven gear (4).

4. The brake shoe gap adjuster wrench of claim 3, wherein: The drive end of the geared motor (3) is connected to an active bevel gear (30). The driving bevel gear (30) is perpendicularly meshed with the driven bevel gear (6). The driven bevel gear (6) is coaxially and fixedly connected to the driving gear (20).

5. The brake shoe clearance adjuster wrench according to claim 4, characterized in that: A handle (7) is also installed at the other end of the housing (1); the handle (7) extends away from the geared motor (3).

6. The brake shoe clearance adjuster wrench according to claim 5, characterized in that: A U-shaped card plate (8) is provided at one end of the handle (7); The clamping plate (8) clamps onto the housing (1), and the bolt passes through the clamping plate (8) and is threadedly connected to the housing (1).

7. The brake shoe clearance adjuster wrench according to claim 2, characterized in that: The bushing (2) is provided with a U-shaped first groove (21); The driven gear (4) is provided with a U-shaped second slot (41); The first slot (21) and the second slot (41) have the same shape and the same opening direction, and are used to engage the pull rod on one side of the adjusting nut.

8. The brake shoe clearance adjuster wrench according to claim 7, characterized in that: The driven gear (4) is disposed inside the housing (1); One end of the housing (1) is provided with a U-shaped third slot (11), the width of which is greater than that of the first slot (21).

9. The brake shoe clearance adjuster wrench according to claim 1, characterized in that: The housing (1) is also equipped with a number of evenly distributed rollers (9), which are rotatably connected to the outer wall of the bushing (2).

10. The brake shoe clearance adjuster wrench according to claim 9, characterized in that: The roller (9) is installed inside the housing (1); A coaxially arranged connecting shaft (10) is fixedly connected between the bushing (2) and the driven gear (4). The connecting shaft (10) is provided with a U-shaped fourth slot (101), which has the same shape as the first slot (21) and the opening direction is the same as the first slot (21).

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