Rack rail wheel compression spring assembling clamp

Abstract

The utility model discloses a rack rail wheel compression spring assembling clamp, and belongs to the technical field of rack rail wheel component assembling tools. The clamp body comprises clamping blocks arranged at the two ends of a spring, a pin shaft capable of penetrating through a backstop at the end part of the spring and fixedly connected with the clamping blocks, and a guide column connected with the two clamping blocks in a sliding manner; the clamping block is provided with a positioning groove matched with the backstop; the safety plate is arranged at the end, away from the clamping block, of the stopping block, and a connecting hole matched with the pin shaft is formed in the safety plate; and the pull rod is used for providing clamping force and is connected with the two clamping blocks, so that the spring is compressed through the clamping blocks so as to be mounted in the U-shaped opening of the toothed rail wheel, the toothed rail wheel spring can be mounted economically and safely, the structure is simple, the use is convenient, the assembly efficiency is high, and the quality is good.

Description

Technical Field

[0001] This utility model relates to the field of tooling technology for assembling gear components, and in particular to a gear compression spring assembly fixture. Background Technology

[0002] A rack railway is a type of mountain railway with strong climbing ability. It consists of racks (tooth-shaped rails) laid in the middle of ordinary railway tracks. The bogies of rack railway vehicles are equipped with rack wheels. When the train is climbing, traction and braking force are transmitted through the meshing of the rack wheels and racks.

[0003] In the rack and pinion assembly of a rack and pinion bogie, torque is transmitted between the hub and the rack and pinion via tangential springs, such as... Figure 1 As shown, multiple springs are installed on the inner ring of the gear wheel. Stops are assembled at both ends of the springs. The stops mate with the arc surface of the gear wheel's groove. The distance between the end face of the stop and the end face of the groove must meet the technical requirements. When assembling the springs and gear wheel, the springs need to be compressed to the specified size before assembly. After assembly, the springs need to be released and the assembly position needs to be repositioned to ensure that the springs are still compressed in the gear wheel and that the installation position is correct. Because the springs have elasticity and the compression elasticity is large, improper operation during assembly can easily cause them to fly off and injure the operators, posing a safety hazard. Moreover, improper positioning after assembly can easily lead to rework, resulting in low assembly efficiency.

[0004] Therefore, based on the above problems, how to provide a gear wheel compression spring assembly fixture has become an important technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide a gear wheel compression spring assembly fixture that solves the assembly problem of gear wheel compression springs using an economical and safe process.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a gear wheel compression spring assembly fixture, comprising:

[0008] The clamping body includes clamping blocks disposed at both ends of the spring, a pin that can pass through the end stop of the spring and be fixedly connected to the clamping blocks, and a guide post that slidably connects the two clamping blocks.

[0009] The clamping block has a positioning groove that mates with the stop;

[0010] A safety plate, which is installed at the end of the stop away from the clamping block, has a connecting hole that mates with the pin; and

[0011] A pull rod for providing clamping force connects two of the clamping blocks to compress a spring via the clamping blocks, so that the spring is inserted into the U-shaped opening of the gear wheel.

[0012] Furthermore, it also includes a tensioning mechanism for stabilizing the pin, wherein the tensioning mechanism is mounted on the side of the safety plate away from the spring.

[0013] Furthermore, the tensioning mechanism includes an auxiliary tensioning rod and two tensioning blocks distributed on both sides of the clamp body and mounted on the pin.

[0014] The auxiliary tensioning rod passes through the two tensioning blocks and is used to provide tension force.

[0015] Furthermore, the clamping block has a mating surface with an arc-shaped structure that fits against the outer wall of the stop on the side of the positioning groove.

[0016] Furthermore, the end of the clamping block has a positioning surface A that abuts against the side of the toothed wheel, and the bottom of the positioning groove has a positioning surface B that abuts against the bottom surface of the stop.

[0017] Furthermore, the clamping block has an avoidance groove on one side of the positioning surface A to avoid the arc segment of the gear wheel.

[0018] Furthermore, the tie rod is a bolt or a threaded rod with positive and negative external threads at both ends.

[0019] Furthermore, the connecting hole in the safety plate is an elongated hole, and a positioning element is installed at the end of the pin to prevent the safety plate from disengaging from the pin.

[0020] Furthermore, the clamping device also includes a locking element for locking the pin.

[0021] One end of the clamping block has a mounting hole for inserting the pin, and the side of the clamping block is fitted with a locking member through a locking hole. The locking member can penetrate into the mounting hole and abut against the outer wall of the pin.

[0022] Furthermore, the guide post includes a plurality of guide posts, and the plurality of guide posts are distributed circumferentially along the tie rod.

[0023] In the above technical solution, the gear wheel compression spring assembly fixture provided by this utility model has the following advantages:

[0024] 1. The clamping body designed in this utility model includes a clamping block, a pin that can pass through the spring end stop and be fixedly connected to the clamping block, a guide post that slidably connects the two clamping blocks, and a clamping block positioning groove that positions the stop, thereby stably clamping the spring. Furthermore, the depth of the positioning groove combined with the positioning surface A can effectively ensure the accuracy of the stop assembly position.

[0025] 2. The safety plate designed in this utility model is installed at the end of the stop away from the clamping block. The safety plate has a connecting hole that cooperates with the pin. By preventing the stops at both ends of the spring from slipping off the pin, the spring is prevented from falling out and injuring people, thus improving the safety of the device.

[0026] 3. The pull rod designed in this utility model is used to provide clamping force. The pull rod connects two clamping blocks, thereby realizing the compression of the spring through the clamping blocks so that the spring can be smoothly installed into the U-shaped opening of the gear wheel.

[0027] This gear wheel compression spring assembly fixture not only meets the assembly requirements of compression springs, but also achieves the goals of being economical, practical, safe, and reliable. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1 This is a schematic diagram of a geared wheel structure in the prior art;

[0030] Figure 2 This is an isometric drawing of the overall structure of the gear wheel compression spring assembly fixture disclosed in this utility model;

[0031] Figure 3 This is an isometric view of the gear wheel compression spring assembly fixture after removing the spring, as disclosed in this utility model.

[0032] Figure 4 This is a schematic diagram of the clamping block structure of the gear wheel compression spring assembly fixture disclosed in this utility model;

[0033] Figure 5 This is a schematic diagram of the safety plate structure of the gear wheel compression spring assembly fixture disclosed in this utility model;

[0034] Figure 6 This is an isometric view of the gear wheel compression spring assembly fixture in use, as disclosed in this utility model.

[0035] Figure 7 This is an isometric view of the gear wheel compression spring assembly fixture disclosed in this utility model, taken from another perspective, in its usage state.

[0036] Explanation of reference numerals in the attached figures:

[0037] 10. Clamping body; 11. Clamping block; 111. Positioning groove; 112. Clearance groove; 12. Guide post A; 13. Guide post B; 14. Pin; 141. Positioning component; 15. Locking component;

[0038] 20. Tie rod; 21. Nut;

[0039] 30. Safety plate; 31. Connection hole;

[0040] 40. Tensioning block; 41. Auxiliary tensioning rod;

[0041] 100. Spring;

[0042] 200, Stop. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0044] Figure 2 Axonometric drawing of the overall structure of the gear wheel compression spring assembly fixture;

[0045] Figure 3 Axonometric view of the gear wheel compression spring assembly fixture after removing the spring;

[0046] A utility model discloses a geared wheel compression spring assembly fixture, comprising: a fixture body 10, a pull rod 20, and a safety plate 30;

[0047] The clamping body 10 includes clamping blocks 11 disposed at both ends of the spring 100, a pin 14 that can pass through the end stop 200 of the spring 100 and be fixedly connected to the clamping blocks 11, and a guide post that slidably connects the two clamping blocks 11. The clamping blocks 11 are provided with positioning grooves 111 that cooperate with the stop 200. The stop 200 is clamped and positioned by the two clamping blocks 11, and the pin 14 is used to fix the stop 200.

[0048] The safety plate 30 is installed at the end of the stop 200 away from the clamping block 11. The safety plate 30 prevents the stops 200 at both ends of the spring 100 from slipping off the pin, avoids the spring 100 from falling out and injuring people, and improves the safety of the device. The safety plate 30 has a connection hole 31 that mates with the pin 14.

[0049] The pull rod 20 is used to provide clamping force and acts as a driving component to apply the compression force of the spring 100. When the effective working length of the pull rod 20 is retracted, the clamping blocks 11 at both ends of the pull rod 20 move and compress the spring 100 so that the spring 100 can be smoothly installed into the U-shaped opening of the gear wheel. Preferably, the pull rod 20 is a bolt or a screw with positive and negative external threads at both ends. When the pull rod 20 is a bolt, the clamping blocks 11 have through holes through which the pull rod 20 can pass. The pull rod 20 retracts its effective working length with the nut, and one of the clamping blocks 11 can be locked by the positioning nut. That is, the pull rod 20 can be fixed to one clamping block 11 by the positioning nut. When the pull rod 20 is a screw with positive and negative external threads, the clamping blocks 11 have threaded holes that cooperate with the pull rod 20. The pull rod 20 is driven to rotate, and the two clamping blocks 11 are synchronously displaced to compress the spring 100.

[0050] See Figure 2 , 3 As shown, the assembly fixture also includes a tensioning mechanism for stabilizing the pin 14;

[0051] Among them, the tensioning mechanism is installed on the side of the safety plate 30 away from the spring 100, where the pin 14 is located.

[0052] The tensioning mechanism includes an auxiliary tensioning rod 41 and two tensioning blocks 40 distributed on both sides of the clamp body 10 and mounted on the pin 14. The auxiliary tensioning rod 41 passes through the two tensioning blocks 40 and is used to provide tension force. That is, the pin 14 fixes the stop 200 and works together with the auxiliary tensioning rod 41 at the end to bear part of the force of the compression spring 100.

[0053] Specifically, the auxiliary tensioning rod 41 is a screw with opposite external threads at both ends. The two ends of the auxiliary tensioning rod 41 are provided with external threads in opposite directions, and are threadedly connected to the tensioning block 40. In use, by driving the auxiliary tensioning rod 41 to rotate, the clamping block drives the pin 14 to compress the spring 100, thereby stably compressing the spring 100. Alternatively, the auxiliary tensioning rod 41 can also be a bolt. The clamping block has a through hole, and the bolt and nut cooperate to provide tension.

[0054] In this structure, the tensioning block 40 and the auxiliary tensioning rod 41 of the tensioning mechanism are used to further stabilize the position of the pin 14. The two ends of the auxiliary tensioning rod 41 are reverse threads. Tightening the middle position of the auxiliary tensioning rod 41 will move the tensioning blocks 40 at both ends inward to further tighten the pin 14 and prevent the pin 14 from tilting due to the elastic deformation caused by the large pressure of the spring 100.

[0055] Figure 4 Schematic diagram of the clamping block structure for assembling a compression spring for a geared wheel;

[0056] Preferably, the clamping block 11 has a mating surface with an arc-shaped structure that fits against the outer wall of the stop 200 on the side of the positioning groove 111. The end of the clamping block 11 has a positioning surface A that abuts against the side of the gear wheel. The bottom of the positioning groove 111 has a positioning surface B that abuts against the bottom surface of the stop 200. The positioning surface A and the positioning surface B can effectively control the exposed height L of the stop 200 after it is assembled with the gear wheel, thereby ensuring that the spring 100 and the stop 200 are successfully assembled in one go and meet the installation size requirements of the spring 100.

[0057] See Figure 4 As shown:

[0058] Preferably, the clamping block 11 has a relief groove 112 on one side of the positioning surface A to avoid the arc segment of the toothed wheel, so as to avoid mechanical interference between the clamping block 11 and the toothed wheel, and so that the spring 100 can be smoothly inserted into the position.

[0059] Figure 5 Schematic diagram of the safety plate structure of the assembly fixture for the gear wheel compression spring 100;

[0060] Preferably, the connecting hole 31 of the safety plate 30 is an elongated hole, which facilitates the adjustment of the position of the tensioning block 40 of the tensioning mechanism and the tightening of the pins 14 at both ends of the auxiliary tensioning rod 41. The pins 14 are equipped with positioning parts 141, which are hexagonal head bolts. The positioning parts 141 contact the safety plate 30 through a washer, thereby preventing the safety plate 30 from disengaging from the pins 14. The end of the pins 14 is provided with a threaded hole that is threaded to the positioning parts 141.

[0061] See Figure 2 As shown:

[0062] To facilitate the replacement of the pin 14, the clamp body 10 also includes a locking element 15 for locking the pin 14;

[0063] One end of the clamping block 11 has an installation hole for inserting the pin 14. A locking member 15 is installed on the side of the clamping block 11 through a locking hole. A limiting groove is opened on the outer wall of the pin 14 corresponding to the position of the locking member 15. The locking member 15 enters the installation hole cavity through the locking hole and its end abuts against the outer wall of the groove of the pin 14. The locking member 15 can be a set screw or bolt in the prior art, and the locking hole is a threaded hole.

[0064] See Figure 3 As shown:

[0065] Preferably, the guide posts include multiple guide posts, which are distributed circumferentially along the pull rod 20. In this embodiment, the guide posts include one guide post B and two guide posts A. The diameter of guide post B is larger than the diameter of guide post A. Guide posts A are distributed on both sides of the pull rod 20, and guide posts B are distributed on the side of the pull rod 20 away from the spring 100. Guide posts A and B together provide guidance and support for the clamping block 11, so that the clamping block can withstand the bending force during the compression of the spring 100 without deformation and can ensure that the clamping block 11 slides smoothly.

[0066] In the above technical solution, the working principle of the gear wheel compression spring assembly fixture provided by this utility model is as follows:

[0067] Figure 6 Isometric view of the gear wheel compression spring assembly fixture in use;

[0068] Figure 7 Another perspective is the isometric view of the gear wheel compression spring assembly fixture in use.

[0069] 1) First, put the spring 100 together with the two end stops 200 into the clamp body 10. The stop 200 is attached to the positioning groove 111 of the clamp block 11, and the end is against the positioning surface B. The pin 14 is inserted into the two holes of the stop 200. Twist the nut to shorten the effective working length of the pull rod 20, thereby compressing the spring 100. Install the safety plate 30.

[0070] 2) Compressing spring 100 from its free state by about 4.5mm to 5mm can meet the installation requirements; at this time, the compression force is not less than 5.5kN.

[0071] 3) Install the compressed spring 100 together with the stop 200 onto the gear wheel;

[0072] Pick up the clamp and insert the spring 100 and the stop 200 into the U-shaped opening of the gear wheel from one side. After the positioning surface A of the clamping block 11 is against the side of the gear wheel, loosen the pull rod 20. The effective working length of the pull rod 20 will extend. After the compressed spring 100 is released, the stop 200 will press against the appropriate position of the notch inside the gear wheel. Remove the safety plate 30 and you can take out the clamp.

[0073] 4) Finally, the depth dimension is used to check the installation position of the stop 200 after installation to confirm that the length of the stop 200 extending from both sides of the gear wheel meets the requirements.

[0074] This gear wheel compression spring assembly fixture is economical and practical, enabling safe and reliable installation of the spring after compression, with good assembly position accuracy, thus improving assembly quality.

[0075] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A toothed wheel compression spring assembly fixture, characterized in that, include: The clamping body (10) includes clamping blocks (11) disposed at both ends of the spring (100), a pin (14) that can pass through the end stop (200) of the spring (100) and is fixedly connected to the clamping blocks (11), and a guide post that slidably connects the two clamping blocks (11). The clamping block (11) is provided with a positioning groove (111) that cooperates with the stop (200); A safety plate (30) is installed at the end of the stop (200) away from the clamping block (11), and the safety plate (30) has a connecting hole (31) that mates with the pin (14); and A pull rod (20) for providing clamping force connects two of the clamping blocks (11) so that the clamping blocks (11) compress the spring (100) so that the spring (100) is inserted into the U-shaped opening of the gear wheel.

2. The toothed wheel compression spring assembly fixture according to claim 1, characterized in that... ； It also includes a tensioning mechanism for stabilizing the pin (14), wherein the pin (14) is mounted on the side of the safety plate (30) away from the spring (100).

3. The toothed wheel compression spring assembly fixture according to claim 2, characterized in that; The tensioning mechanism includes an auxiliary tensioning rod (41) and two tensioning blocks (40) distributed on both sides of the clamp body (10) and mounted on the pin (14); The auxiliary tensioning rod (41) passes through the two tensioning blocks (40) to provide tension force.

4. The toothed wheel compression spring assembly fixture according to claim 1, characterized in that; The clamping block (11) has a mating surface with an arc-shaped structure that fits against the outer wall of the stop (200) on the side of the positioning groove (111).

5. The toothed wheel compression spring assembly fixture according to claim 4, characterized in that; The end of the clamping block (11) has a positioning surface A that abuts against the side of the gear wheel, and the bottom of the positioning groove (111) has a positioning surface B that abuts against the bottom surface of the stop (200).

6. The toothed wheel compression spring assembly fixture according to claim 5, characterized in that; The clamping block (11) has an avoidance groove (112) on one side of the positioning surface A to avoid the arc segment of the toothed wheel.

7. A toothed wheel compression spring assembly fixture according to claim 1, characterized in that... ； The tie rod (20) is a bolt or a screw with positive and negative external threads at both ends.

8. A toothed wheel compression spring assembly fixture according to claim 1, Its characteristics are: The connecting hole (31) of the safety plate (30) is an elongated hole, and a positioning element (141) is installed at the end of the pin (14) to prevent the safety plate (30) from disengaging from the pin (14).

9. A toothed wheel compression spring assembly fixture according to claim 1, characterized in that; The clamping body (10) also includes a locking member (15) for locking the pin (14); The clamping block (11) has an installation hole at one end for inserting the pin (14), and the locking member (15) is installed on the side of the clamping block (11) through a lock hole. The locking member (15) can penetrate into the installation hole and abut against the outer wall of the pin (14).

10. A toothed wheel compression spring assembly fixture according to claim 1, characterized in that... ； The guide post includes a plurality of guide posts, and the plurality of guide posts are distributed circumferentially along the tie rod (20).

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