Pre-assembling tool for axle box locking mechanism

Abstract

The utility model relates to the technical field of tools, and provides a pre-assembling tool for an axle box locking mechanism, the axle box locking mechanism comprises a locking pin, a locking spring and a cover plate, the locking pin and the locking spring are located in a mounting hole of an axle box body, the cover plate abuts against the locking spring, the cover plate is fixedly connected with the axle box body, and the cover plate is fixedly connected with the axle box body. The pre-assembling tool for the axle box locking mechanism comprises a supporting frame, a pressing block and a driving mechanism, the supporting frame is provided with a first overhanging arm and a second overhanging arm, an avoiding space is formed between the first overhanging arm and the second overhanging arm so as to avoid an axle box body, and the first overhanging arm abuts against a locking pin; the pressing block is arranged on the second overhanging arm, the pressing block can be close to or away from the first overhanging arm, and the pressing block abuts against the cover plate; the driving mechanism is arranged on the second overhanging arm and drives the pressing block to be close to or away from the first overhanging arm. Therefore, when the locking mechanism is assembled on the axle box body, the pre-assembling tool for the axle box locking mechanism can compress the locking spring, and the assembling difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology, and provides a pre-assembled tooling for axle box locking mechanism. Background Technology

[0002] The axle box is an important component of the bogie in rail vehicles. Its primary function is to support the wheel axles, ensuring their smooth rotation and transferring the vehicle's weight to the wheels via the bogie. The design and function of the axle box directly impact the safety, comfort, and efficiency of the rail vehicle.

[0003] Some rail vehicles have locking mechanisms on their axle boxes. These mechanisms include a locking pin and a locking spring. The axle box has mounting holes into which the locking pin is placed. One end of the locking pin passes through one end of the mounting hole, and the other end abuts against one end of the locking spring. A spring cap is located at the other end of the mounting hole to press the locking spring down. The locking spring is compressed to provide locking force to the locking pin. Pre-compression is required during assembly of the locking mechanism. Due to the significant pre-compression of the locking spring, assembly is not easy.

[0004] Therefore, how to solve the problem of high preload of locking springs and difficulty in assembly when assembling locking mechanisms on axle boxes in related technologies has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] This utility model provides a pre-assembly fixture for axle box locking mechanism to solve the defects in related technologies where the locking spring preload is large and difficult to assemble when assembling the locking mechanism on the axle box. The fixture can preload the locking spring when assembling the locking mechanism on the axle box to reduce assembly difficulty.

[0006] This utility model provides a pre-assembly fixture for a shaft box locking mechanism. The shaft box locking mechanism includes a locking pin, a locking spring, and a cover plate. The locking pin and the locking spring are located in mounting holes in the shaft box body. The cover plate is adapted to abut against the locking spring and is fixedly connected to the shaft box body. The pre-assembly fixture for the shaft box locking mechanism includes:

[0007] The support frame has a first cantilever arm and a second cantilever arm, with a clearance space between the first cantilever arm and the second cantilever arm to avoid the axle box body, and the first cantilever arm is adapted to abut against the locking pin;

[0008] A clamping block is disposed on the second cantilever arm, the clamping block can be close to or far from the first cantilever arm, and the clamping block is adapted to abut against the cover plate;

[0009] A drive mechanism is provided on the second cantilever arm, the drive mechanism being adapted to drive the clamping block closer to or away from the first cantilever arm.

[0010] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein a first positioning groove is provided on the side of the first cantilever arm facing the second cantilever arm, the first positioning groove is adapted to allow the locking pin to extend into it, and the shape and size of the first positioning groove are adapted to the shape and size of the end of the locking pin.

[0011] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the first positioning groove is a V-shaped groove.

[0012] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the shaft box locking mechanism further includes a guide post and a locking nut, one end of the guide post is adapted to extend into the locking spring, the other end of the guide post passes through the cover plate, the locking nut is located on the side of the cover plate away from the locking pin, and the locking nut is threadedly connected to the guide post;

[0013] The clamping block is provided with a second positioning groove, which is adapted for the locking nut to extend into, and the shape and size of the second positioning groove are adapted to the shape and size of the locking nut.

[0014] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the driving mechanism includes either a hydraulic jack or a mechanical jack.

[0015] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the driving mechanism includes a hydraulic jack, and the hydraulic jack includes:

[0016] A manual hydraulic pump is located on the side of the second cantilever arm away from the first cantilever arm;

[0017] A hydraulic jack is disposed on the side of the second cantilever arm close to the first cantilever arm. The hydraulic jack and the manual hydraulic pump are connected through a hydraulic hose. The axis of the hydraulic jack is parallel to the distribution direction of the first and second cantilever arms. The fixed part of the hydraulic jack is fixedly connected to the second cantilever arm, and the clamping block is fixed to the movable part of the hydraulic jack.

[0018] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the support frame includes:

[0019] A pair of beams, parallel to each other and spaced apart;

[0020] A column is disposed between a pair of crossbeams, with each end of the column connected to one end of the pair of crossbeams. The other ends of the pair of crossbeams are suspended relative to the column to form the first cantilever arm and the second cantilever arm.

[0021] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein at least two columns are provided, each column is parallel to the other, each column is distributed along the axial direction of the crossbeam, and each column is fixedly connected to a pair of crossbeams.

[0022] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the crossbeam and the column are both tubular components, and the cross-sectional shape of the crossbeam and the column is rectangular.

[0023] According to the present invention, a pre-assembly fixture for a shaft box locking mechanism is provided, wherein the support frame is provided with a handle.

[0024] This utility model provides a pre-assembly fixture for an axle box locking mechanism, comprising a support frame, a clamping block, and a drive mechanism. The axle box locking mechanism includes a locking pin, a locking spring, and a cover plate. A mounting hole is provided on the axle box body, and the locking pin and locking spring are located within the mounting hole. The cover plate abuts against the locking spring and is fixedly connected to the axle box body. The support frame has a first cantilever arm and a second cantilever arm, forming a clearance space between them to allow clearance from the axle box body. One end of the axle box body for mounting the locking mechanism can be located between the first and second cantilever arms. The first cantilever arm abuts against the locking pin, and the clamping block is disposed on the second cantilever arm. The clamping block can move closer to or further away from the first cantilever arm and abuts against the cover plate. The drive mechanism is disposed on the second cantilever arm and drives the clamping block closer to or further away from the first cantilever arm. When assembling the locking mechanism on the axle box, the locking pin and locking spring are installed in the mounting holes on the axle box, so that the locking spring abuts against the locking pin. Then, the support frame is moved so that the axle box end with the locking pin and locking spring is located between the first and second cantilever arms, so that the end of the locking pin abuts against the first cantilever arm. After placing the cover plate on the end of the spring, the driving mechanism drives the clamping block closer to the cover plate and applies pressure to the cover plate to pre-compress the locking spring. Then, the operator fixes the cover plate to the axle box. After fixing the cover plate to the axle box, the driving mechanism drives the clamping block away from the cover plate and axle box, increasing the distance between the first and second cantilever arms, so as to move the support frame and separate the axle box equipped with the locking mechanism from the pre-assembled tooling provided by this utility model for the axle box locking mechanism. With this configuration, when assembling the locking mechanism on the axle box, the pre-assembly tooling provided by this invention can compress the locking spring, reducing assembly difficulty and solving the problem of high preload of the locking spring and difficulty in assembly when assembling the locking mechanism on the axle box in related technologies. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the pre-assembled tooling structure for the axle box locking mechanism provided by this utility model.

[0027] Figure 2 This is a schematic diagram of the pre-assembled structure of the axle box locking mechanism provided by this utility model during use.

[0028] Figure label:

[0029] 1. Locking pin; 2. Locking spring; 3. Cover plate; 4. Shaft box body; 5. Guide post; 6. Locking nut; 7. Pressing block; 8. First positioning groove; 9. Second positioning groove; 10. Manual hydraulic pump; 11. Hydraulic jack; 12. Crossbeam; 13. Column; 14. Operating handle; 15. Hydraulic hose. Detailed Implementation

[0030] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0031] The following is combined with Figures 1 to 2 This invention describes a pre-assembly tooling for axle box locking mechanism.

[0032] like Figures 1 to 2 As shown, the pre-assembly fixture for the axle box locking mechanism provided in this embodiment of the present invention includes a support frame, a clamping block 7, and a drive mechanism.

[0033] Specifically, the axle box locking mechanism includes a locking pin 1, a locking spring 2, and a cover plate 3. A mounting hole is provided on the axle box body 4, and the locking pin 1 and locking spring 2 are located within the mounting hole. One end of the locking pin 1 extends into the mounting hole, and a limiting step is provided between the inner wall of the mounting hole and the locking pin 1, preventing the locking pin 1 from disengaging entirely from the mounting hole. One end of the locking spring 2 abuts against the locking pin 1; specifically, a limiting groove is provided at the end of the locking pin 1, and the end of the locking spring 2 is located within the limiting groove. The cover plate 3 abuts against the other end of the locking spring 2, and the cover plate 3 is fixedly connected to the axle box body 4. After the locking mechanism is assembled on the axle box body 4, the locking spring 2 is compressed under the action of the locking pin 1 and the cover plate 3.

[0034] In this embodiment, the support frame has a first cantilever arm and a second cantilever arm, with a clearance space between the first and second cantilever arms to allow clearance from the axle housing 4. One end of the axle housing 4 for mounting the locking mechanism can be located between the first and second cantilever arms, with the first cantilever arm abutting against the locking pin 1.

[0035] A clamping block 7 is disposed on the second cantilever arm. The clamping block 7 can move closer to or further away from the first cantilever arm. The clamping block 7 is used to abut against the cover plate 3. A drive mechanism is disposed on the second cantilever arm. The drive mechanism is used to drive the clamping block 7 to move closer to or further away from the first cantilever arm.

[0036] When assembling the locking mechanism on the axle box 4, the locking pin 1 and locking spring 2 are installed in the mounting holes on the axle box 4, so that the locking spring 2 abuts against the locking pin 1. Then, the support frame is moved so that the axle box end with the locking pin 1 and locking spring 2 is located between the first cantilever arm and the second cantilever arm, so that the end of the locking pin 1 abuts against the first cantilever arm. After placing the cover plate 3 on the end of the spring, the driving mechanism drives the clamping block 7 to approach the cover plate 3 and applies pressure to the cover plate 3 to pre-compress the locking spring 2. Then, the operator can fix the cover plate 3 to the axle box 4 together.

[0037] After fixing the cover plate 3 to the axle box 4, the clamping block 7 is driven away from the cover plate 3 and the axle box 4 by the drive mechanism, increasing the distance between the first cantilever arm and the second cantilever arm, so as to facilitate the movement of the support frame and separate the axle box 4 equipped with the locking mechanism from the pre-assembled tooling for the axle box locking mechanism provided in this utility model embodiment.

[0038] With this configuration, when assembling the locking mechanism on the axle box body 4, the pre-assembled tooling provided in this embodiment of the invention can compress the locking spring 2, reducing the assembly difficulty and solving the problem in related technologies where the locking spring 2 has a large preload and is difficult to assemble when assembling the locking mechanism on the axle box.

[0039] In this embodiment of the invention, a first positioning groove 8 is provided on the first cantilever arm, and the first positioning groove 8 is located on the side of the first cantilever arm facing the second cantilever arm. The first positioning groove 8 is used for the locking pin 1 to extend into. When the locking mechanism is assembled on the axle box 4, the end of the locking pin 1 abuts against the bottom wall of the first positioning groove 8, and the first cantilever arm and the first positioning groove 8 can support the locking pin 1.

[0040] The shape and dimensions of the first positioning groove 8 are adapted to the shape and dimensions of the end of the locking pin 1. After the end of the locking pin 1 extends into the first positioning groove 8, the interaction between the locking pin 1 and the inner wall of the first positioning groove 8 can limit the sliding of the locking pin 1 relative to the first positioning groove 8. When the locking spring 2 is compressed, the relative stability of the axle box 4, the locking mechanism, and the pre-assembled tooling for the axle box locking mechanism can be ensured.

[0041] It should be noted that when the first positioning groove 8 is set on the first cantilever arm, it is necessary to ensure that the first positioning groove 8 corresponds with the clamping block 7 so that when the locking pin 1 is located in the first positioning groove 8, the clamping block 7 can be aligned with the cover plate 3 so that the clamping block 7 can abut against the cover plate 3.

[0042] In some embodiments, the end of the locking pin 1 away from the locking spring 2 has two beveled surfaces, which intersect to form an edge perpendicular to the axis of the locking pin 1.

[0043] In this embodiment, the first positioning groove 8 is configured as a V-shaped groove, and the included angle between the two sidewalls of the V-shaped groove is consistent with the included angle between the two beveled surfaces of the locking pin 1. When the locking pin 1 extends into the first positioning groove 8, the two beveled surfaces of the locking pin 1 abut against the two sidewalls of the V-shaped groove, respectively.

[0044] Furthermore, even if the end of the locking pin 1 does not have a chamfered surface, and the end of the locking pin 1 is cylindrical, the first positioning groove 8 can still accommodate locking pins 1 of different diameters.

[0045] In addition, the included angle between the two oblique surfaces is related to the V-groove.

[0046] In some embodiments, the axle box locking mechanism further includes a guide post 5 and a locking nut 6. One end of the guide post 5 is used to extend into the locking spring 2 to guide the locking spring 2, so as to prevent the locking spring 2 from lateral deflection or bending deformation when it is compressed, and to ensure the stability of the locking spring 2.

[0047] The other end of the guide post 5 passes through the cover plate 3, and the locking nut 6 is located on the side of the cover plate 3 away from the locking pin 1. The locking nut 6 is threadedly connected to the guide post 5, thereby achieving a fixed connection between the guide post 5 and the cover plate 3. Specifically, a stepped structure is provided at the other end of the guide post 5 to limit the guide post 5 and the cover plate 3, ensuring the relative stability of the guide post 5 and the cover plate 3.

[0048] In this embodiment, a second positioning groove 9 is provided on the clamping block 7. The second positioning groove 9 is used for the locking nut 6 to extend into, and the shape and size of the second positioning groove 9 are adapted to the shape and size of the locking nut 6. When the clamping block 7 abuts against the cover plate 3, the locking nut 6 is positioned in the second positioning groove 9. The interaction between the locking nut 6 and the inner wall of the second positioning groove 9 can limit the sliding of the cover plate 3 relative to the clamping block 7, ensuring the stability of the position of the cover plate 3.

[0049] In this embodiment, the driving mechanism includes either a hydraulic jack or a mechanical jack.

[0050] Hydraulic jacks have a large lifting capacity, are easy to operate, and have excellent stability, which can reduce the impact on the axial locking mechanism.

[0051] Mechanical jacks have a simple structure, are easy to maintain, have a low failure rate, are sturdy and durable, and can work stably for a long time.

[0052] Specifically, in this embodiment, a hydraulic jack is selected as the driving mechanism.

[0053] The hydraulic jack includes a manual hydraulic pump 10 and a hydraulic jack rod 11. The manual hydraulic pump 10 is located on the side of the second cantilever arm away from the first cantilever arm, and the hydraulic jack rod 11 is located on the side of the second cantilever arm close to the first cantilever arm. The hydraulic jack rod 11 and the manual hydraulic pump 10 are connected by a hydraulic hose 15.

[0054] The manual hydraulic pump 10 has an operating handle 14. By pressing the operating handle 14, hydraulic oil can be delivered to the hydraulic jack 11, causing the hydraulic jack 11 to extend.

[0055] The axis of the hydraulic jack 11 is parallel to the distribution direction of the first and second cantilever arms. The fixed part of the hydraulic jack 11 is fixedly connected to the second cantilever arm, and the clamping block 7 is fixed to the moving part of the hydraulic jack 11. When the hydraulic jack 11 extends, the moving part of the hydraulic jack 11 drives the clamping block 7 to approach the first cantilever arm.

[0056] It should be noted that the manual hydraulic pump 10 or the hydraulic jack 11 has a release valve to release the pressure of the hydraulic jack 11, causing the hydraulic jack 11 to retract. When the hydraulic jack 11 retracts, the moving part of the hydraulic jack 11 drives the clamping block 7 away from the first cantilever arm.

[0057] In this embodiment of the utility model, the support frame includes a column 13 and a pair of crossbeams 12.

[0058] A pair of horizontal beams 12 are parallel to each other and spaced apart. A column 13 is positioned between the two horizontal beams 12. Each end of the column 13 is connected to one end of a pair of horizontal beams 12. The other ends of both horizontal beams 12 are suspended relative to the column 13, making the support frame C-shaped. The suspended portion of one horizontal beam 12 relative to the column 13 forms a first cantilever arm, and the suspended portion of the other horizontal beam 12 relative to the column 13 forms a second cantilever arm.

[0059] In this embodiment, at least two columns 13 are provided, each column 13 is parallel to each other, each column 13 is distributed along the axis of the crossbeam 12, and each column 13 is fixedly connected to a pair of crossbeams 12.

[0060] This configuration, by increasing the number of columns 13, can improve the structural strength and load-bearing capacity of the support frame, and enhance its resistance to deformation.

[0061] In this embodiment, both the crossbeam 12 and the column 13 are pipe fittings, and the cross-sectional shape of the crossbeam 12 and the column 13 is rectangular.

[0062] Specifically, square hollow steel pipes can be used to process the crossbeams 12 and columns 13.

[0063] In this embodiment, a handle is provided on the support frame, allowing the operator to apply force to the support frame. When assembling the locking mechanism on the axle box 4, the operator can easily hold the support frame to ensure the stability of the pre-assembled tooling used for the axle box locking mechanism. Furthermore, it facilitates the handling of the pre-assembled tooling used for the axle box locking mechanism.

[0064] In summary, the pre-assembly fixture for the axle box locking mechanism provided by this utility model embodiment has a simple structure, does not damage the axle box body 4, locking mechanism and other assembly components, and the pre-compression process of the locking spring 2 is simple and fast, which is conducive to improving the assembly efficiency of the axle box locking mechanism.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pre-assembly tooling for an axle box locking mechanism, characterized in that, The axle box locking mechanism includes a locking pin (1), a locking spring (2), and a cover plate (3). The locking pin (1) and the locking spring (2) are located in the mounting holes of the axle box body (4). The cover plate (3) is adapted to abut against the locking spring (2). The cover plate (3) is fixedly connected to the axle box body (4). The pre-assembly fixture for the axle box locking mechanism includes: The support frame has a first cantilever arm and a second cantilever arm, and a clearance space is formed between the first cantilever arm and the second cantilever arm to avoid the axle box body (4). The first cantilever arm is adapted to abut against the locking pin (1). A clamping block (7) is disposed on the second cantilever arm. The clamping block (7) can be close to or away from the first cantilever arm. The clamping block (7) is adapted to abut against the cover plate (3). A drive mechanism is provided on the second cantilever arm, the drive mechanism being adapted to drive the clamping block (7) to move closer to or away from the first cantilever arm.

2. The pre-assembly tooling for the axle box locking mechanism according to claim 1, characterized in that, The first cantilever arm has a first positioning groove (8) on the side facing the second cantilever arm. The first positioning groove (8) is adapted to allow the locking pin (1) to extend into it. The shape and size of the first positioning groove (8) are adapted to the shape and size of the end of the locking pin (1).

3. The pre-assembly tooling for the axle box locking mechanism according to claim 2, characterized in that, The first positioning groove (8) is a V-shaped groove.

4. The pre-assembly tooling for the axle box locking mechanism according to claim 1, characterized in that, The axle box locking mechanism also includes a guide post (5) and a locking nut (6). One end of the guide post (5) is adapted to extend into the locking spring (2), and the other end of the guide post (5) passes through the cover plate (3). The locking nut (6) is located on the side of the cover plate (3) away from the locking pin (1), and the locking nut (6) is threadedly connected to the guide post (5). The clamping block (7) is provided with a second positioning groove (9), which is suitable for the locking nut (6) to extend into. The shape and size of the second positioning groove (9) are adapted to the shape and size of the locking nut (6).

5. The pre-assembly fixture for the axle box locking mechanism according to claim 1, characterized in that, The drive mechanism includes either a hydraulic jack or a mechanical jack.

6. The pre-assembly tooling for the axle box locking mechanism according to claim 5, characterized in that, The driving mechanism includes a hydraulic jack, and the hydraulic jack includes: A manual hydraulic pump (10) is located on the side of the second cantilever arm away from the first cantilever arm; A hydraulic jack (11) is disposed on the side of the second cantilever arm close to the first cantilever arm. The hydraulic jack (11) and the manual hydraulic pump (10) are connected through a hydraulic hose (15). The axis of the hydraulic jack (11) is parallel to the distribution direction of the first cantilever arm and the second cantilever arm. The fixed part of the hydraulic jack (11) is fixedly connected to the second cantilever arm. The clamping block (7) is fixed to the moving part of the hydraulic jack (11).

7. The pre-assembly tooling for the axle box locking mechanism according to any one of claims 1-6, characterized in that, The support frame includes: A pair of crossbeams (12) are parallel to each other and spaced apart; A column (13) is disposed between a pair of beams (12). The two ends of the column (13) are respectively connected to one end of a pair of beams (12). The other ends of the pair of beams (12) are suspended relative to the column (13) to form the first cantilever arm and the second cantilever arm.

8. The pre-assembly tooling for the axle box locking mechanism according to claim 7, characterized in that, At least two columns (13) are provided, each column (13) is parallel to each other, each column (13) is distributed along the axis of the crossbeam (12), and each column (13) is fixedly connected to a pair of crossbeams (12).

9. The pre-assembly tooling for the axle box locking mechanism according to claim 7, characterized in that, Both the crossbeam (12) and the column (13) are pipe fittings, and the cross-sectional shape of the crossbeam (12) and the column (13) is rectangular.

10. The pre-assembly tooling for the axle box locking mechanism according to any one of claims 1-6, characterized in that, The support frame is equipped with a handle.

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