Rack rail wheel compression spring assembling clamp

Abstract

The invention discloses a rack rail wheel compression spring assembling clamp, and belongs to the technical field of rack rail wheel part 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 of the spring and fixedly connected with the clamping blocks, and a guide column connected with the two clamping blocks in a sliding mode; 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 can be compressed through the clamping blocks so that the spring can be installed in a U-shaped opening of the toothed rail wheel, the toothed rail wheel spring can be installed economically and safely, the structure is simple, use is convenient, the assembling efficiency is high, and the quality is good.

Description

Technical Field

[0001] The invention relates to the technical field of rack wheel component assembly tooling, and in particular to a rack wheel compression spring assembly fixture. Background Art

[0002] A rack railway is a mountain railway with strong climbing ability. A "rack" (toothed track) is laid in the middle of an ordinary railway track. The bogie of the rack railway vehicle is equipped with rack wheels. When the train climbs a mountain, traction and braking force are transmitted through the meshing of the rack wheels and the rack.

[0003] In the rack-and-rail wheel device of the rack-and-rail bogie, the torque is transmitted between the wheel hub and the rack-and-rail wheel through the tangential spring, such as Figure 1 As shown, a plurality of springs are installed in the inner ring of the rack wheel, and stops are assembled at both ends of the springs. The stops match the arc surface of the rack wheel slot, and the distance between the end face of the stop and the end face of the slot needs to meet the technical requirements. When assembling the spring and the rack wheel, it is necessary to compress the spring to the specified size before assembly. After assembly, it is necessary to loosen the spring and locate the assembly position to ensure that the spring is still in a compressed state in the rack wheel and the installation position is correct. Since the spring has elastic force and the compression elastic force is large, it is easy to fly and accidentally injure the operator during assembly if the operation is improper, which poses a safety hazard. Moreover, if the position is improper after assembly, it is easy to rework, resulting in low assembly efficiency.

[0004] Therefore, based on the above problems, how to provide a rack wheel compression spring assembly fixture has become an important technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a rack wheel compression spring assembly fixture, which solves the problem of rack wheel compression spring assembly by utilizing an economical and safe process method.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention discloses a rack wheel compression spring assembly fixture, comprising:

[0008] A clamp body, which includes clamp blocks arranged at both ends of the spring, a pin capable of penetrating the end stops of the spring and fixedly connected to the clamp blocks, and a guide column slidably connecting the two clamp blocks;

[0009] The clamping block is provided with a positioning groove matched with the stopper;

[0010] A safety plate, which is installed at the end of the stopper away from the clamping block, and the safety plate is provided with a connecting hole that cooperates with the pin shaft; and

[0011] A pull rod for providing clamping force connects the two clamping blocks so as to compress the spring through the clamping blocks so that the spring is installed in the U-shaped opening of the rack wheel.

[0012] Furthermore, it also includes a tensioning mechanism for stabilizing the pin shaft, and the tensioning mechanism is installed 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 installed on the pin shaft;

[0014] The auxiliary tensioning rod passes through the two tensioning blocks and is used for providing tensioning force.

[0015] Furthermore, the clamping block is located at the side of the positioning groove and has a matching surface with an arc structure that fits with the outer wall of the stopper.

[0016] Furthermore, a positioning surface A is formed at the end of the clamping block and abuts against the side surface of the rack wheel, and a positioning surface B is formed at the bottom of the positioning groove and abuts against the bottom surface of the stopper.

[0017] Furthermore, the clamping block is provided with an avoidance groove on one side of the positioning surface A for avoiding the circular arc segment of the rack wheel.

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

[0019] Furthermore, the connection hole formed in the safety plate is an oblong hole, and a positioning piece for preventing the safety plate from being separated from the pin is installed at the end of the pin shaft.

[0020] Furthermore, the clamp body also includes a locking member for locking the pin shaft;

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

[0022] Furthermore, the guide pillars include a plurality of guide pillars, and the plurality of guide pillars are distributed along the circumference of the pull rod.

[0023] In the above technical solution, the present invention provides a rack wheel compression spring assembly fixture, which has the following beneficial effects:

[0024] 1. The clamp body designed in the present invention comprises a clamp block, a pin shaft that can penetrate the end stop of the spring and is fixedly connected to the clamp block, a guide column that slidably connects the two clamp blocks, and a clamp block positioning groove that positions the stop, so that the spring can be stably clamped, and the depth of the positioning groove is matched with the positioning surface A to effectively ensure the accuracy of the stop assembly position;

[0025] 2. The safety plate designed in the present invention is installed at the end of the stopper away from the clamping block. The safety plate is provided with a connection hole that cooperates with the pin shaft, which prevents the stops at both ends of the spring from slipping off the pin shaft, thereby preventing the spring from falling out and injuring people, thereby improving the safety of the device;

[0026] 3. The pull rod designed in the present invention is used to provide clamping force. The pull rod connects two clamping blocks, thereby compressing the spring through the clamping blocks so that the spring can be smoothly installed in the U-shaped opening of the rack wheel.

[0027] The rack wheel compression spring assembly fixture not only meets the assembly requirements of the compression spring, but also achieves the goals of being economical, practical, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

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

[0030] Figure 2 It is an axonometric view of the overall structure of the rack wheel compression spring assembly fixture disclosed in the present invention;

[0031] Figure 3 It is an axonometric view of the rack wheel compression spring assembly fixture disclosed in the present invention after the spring is removed;

[0032] Figure 4 It is a schematic diagram of the structure of the clamp block of the rack wheel compression spring assembly fixture disclosed in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the safety plate of the rack wheel compression spring assembly fixture disclosed in the present invention;

[0034] Figure 6 It is an axonometric view of the rack wheel compression spring assembly fixture disclosed in the present invention in the use state;

[0035] Figure 7 It is an axonometric view from another perspective of the use state of the rack wheel compression spring assembly fixture disclosed by the present invention.

[0036] Description of reference numerals:

[0037] 10. Clamp body; 11. Clamp block; 111. Positioning groove; 112. Avoidance groove; 12. Guide column A; 13. Guide column B; 14. Pin shaft; 141. Positioning piece; 15. Locking piece;

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

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

[0040] 40. tension block; 41. auxiliary tension rod;

[0041] 100. Spring;

[0042] 200. Stop. DETAILED DESCRIPTION

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

[0044] Figure 2 This is the overall structure axonometric drawing of the rack wheel compression spring assembly fixture;

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

[0046] A rack wheel compression spring assembly fixture is invented, comprising: a fixture body 10, a pull rod 20, and a safety plate 30;

[0047] The clamp body 10 includes a clamp block 11 disposed at both ends of the spring 100, a pin shaft 14 that can penetrate the end stopper 200 of the spring 100 and is fixedly connected to the clamp block 11, and a guide column that slidably connects the two clamp blocks 11, wherein the clamp block 11 is provided with a positioning groove 111 that cooperates with the stopper 200, the stopper 200 is clamped and positioned by the two clamp blocks 11, and the pin shaft 14 is used to fix the stopper 200;

[0048] The safety plate 30 is installed at the end of the stopper 200 away from the clamping block 11. The safety plate 30 prevents the stoppers 200 at both ends of the spring 100 from slipping off the pin shaft, thereby preventing the spring 100 from falling off and injuring people, thereby improving the safety of the device. The safety plate 30 is provided with a connecting hole 31 that cooperates with the pin shaft 14;

[0049] The pull rod 20 is used to provide a clamping force and serves as a driving member for applying a compressive force to the spring 100. When the effective working length of the pull rod 20 is reduced, 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 in the U-shaped opening of the rack wheel. Preferably, the pull rod 20 is a bolt in the prior art or a screw with positive and negative external threads at both ends. When the pull rod 20 is a bolt, a through hole is provided on the clamping block 11 through which the pull rod 20 can pass. The pull rod 20 cooperates with the nut to reduce the effective working length of the pull rod 20, and one of the clamping blocks 11 can be locked by the positioning nut. That is to say, one clamping block 11 can be fixedly connected to the pull rod 20 by the positioning nut. When the pull rod 20 is a screw with positive and negative external threads, a threaded hole matching the pull rod 20 is provided on the clamping block 11, driving the pull rod 20 to rotate, and the two clamping blocks 11 are synchronously displaced to compress the spring 100.

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

[0051] The pin shaft 14 is located on the side of the safety plate 30 away from the spring 100 and is provided with a tensioning mechanism.

[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 installed on the pin shaft 14. The auxiliary tensioning rod 41 runs through the two tensioning blocks 40 to provide tensioning force. That is, the pin shaft 14 fixes the stopper 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 tension rod 41 is a screw with positive and negative external threads at both ends. The auxiliary tension rod 41 is provided with external threads with opposite rotation directions at both ends, and is threadedly connected with the tension block 40 through the threads. When in use, the auxiliary tension rod 41 is driven to rotate, and the clamping block is driven to drive the pin 14 to compress the spring 100, so that the pin 14 stably compresses the spring 100. Of course, the auxiliary tension rod 41 can also be a bolt, and the clamping block is provided with a through hole, and the bolt cooperates with the nut to provide tensioning force;

[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. The middle position of the auxiliary tensioning rod 41 is screwed to move the tensioning blocks 40 at both ends inward to further tighten the pin 14, thereby preventing the pin 14 from tilting due to elastic deformation caused by the high pressure of the spring 100.

[0055] Figure 4 This is a schematic diagram of the structure of the clamp block of the rack wheel compression spring assembly fixture;

[0056] Preferably, the clamp block 11 is formed with a matching surface of an arc structure that fits with the outer wall of the stopper 200 at the side of the positioning groove 111, and a positioning surface A that abuts against the side of the rack wheel is formed at the end of the clamp block 11, and a positioning surface B that abuts against the bottom surface of the stopper 200 is formed at the bottom of the positioning groove 111. The exposed height L of the stopper 200 after assembly with the rack wheel can be effectively controlled by the cooperation of the positioning surface A and the positioning surface B, so as to ensure that the spring 100 and the stopper 200 are assembled successfully at one time, and the installation size requirements of the spring 100 are met;

[0057] See also Figure 4 As shown:

[0058] Preferably, a side of the clamping block 11 located on the positioning surface A is provided with an avoidance groove 112 for avoiding the arc segment of the rack wheel to avoid mechanical interference between the clamping block 11 and the rack wheel, so that the spring 100 can be smoothly positioned.

[0059] Figure 5 It is a schematic diagram of the structure of the safety plate of the assembly fixture of the rack wheel compression spring 100;

[0060] Preferably, the connecting hole 31 provided in the safety plate 30 is an oblong hole, which is convenient for adjusting the position of the tightening block 40 of the tightening mechanism and tightening the pins 14 at both ends of the auxiliary tightening rod 41. The pin 14 is installed with a positioning piece 141, which is a hexagon head bolt. The positioning piece 141 contacts the safety plate 30 through a gasket, thereby preventing the safety plate 30 from detaching from the pin 14. A screw hole threadedly connected to the positioning piece 141 is provided at the end of the pin 14.

[0061] See also Figure 2 As shown:

[0062] In order to facilitate replacement of the pin shaft 14, the clamp body 10 further includes a locking member 15 for locking the pin shaft 14;

[0063] A mounting hole for inserting the pin shaft 14 is opened at one end of the clamping block 11, and a locking piece 15 is installed on the side of the clamping block 11 through the lock hole. A limited groove is opened on the outer wall of the pin shaft 14 corresponding to the position of the locking piece 15. The locking piece 15 enters the inner cavity of the mounting hole through the lock hole and the end thereof abuts against the outer wall of the groove of the pin shaft 14. The locking piece 15 can be a top screw or a bolt in the prior art, and the lock hole is a threaded hole.

[0064] See also Figure 3 As shown:

[0065] Preferably, the guide pillars include a plurality of guide pillars, and the plurality of guide pillars are distributed circumferentially along the pull rod 20. In this embodiment, the guide pillars include one guide pillar B and two guide pillars A. The diameter of guide pillar B is larger than the diameter of guide pillar A. Guide pillar A is distributed on both sides of the pull rod 20, and guide pillar B is distributed on the side of the pull rod 20 away from the spring 100. Guide pillar A and guide pillar B jointly provide guiding and supporting functions for the clamping block 11, so that the clamping body can withstand the bending force in the process of compressing the spring 100 without deformation and can ensure smooth sliding of the clamping block 11.

[0066] In the above technical solution, the present invention provides a rack wheel compression spring assembly fixture, the working principle of which is:

[0067] Figure 6 Axonometric drawing of the use status of the rack wheel compression spring assembly fixture;

[0068] Figure 7 Another perspective axonometric drawing of the rack wheel compression spring assembly fixture in use;

[0069] 1) First, put the spring 100 together with the stops 200 at both ends into the clamp body 10, the stop 200 is against 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, and the nut is twisted to shorten the effective working length of the pull rod 20 to compress the spring 100, and install the safety plate 30;

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

[0071] 3) Install the compressed spring 100 together with the stopper 200 on the rack wheel;

[0072] Pick up the clamp, insert the spring 100 together with the stop 200 into the U-shaped opening of the rack wheel from one side of the rack wheel, after the positioning surface A of the clamp block 11 is against the side of the rack wheel, loosen the pull rod 20, the effective working length of the pull rod 20 is extended, and after the compressed spring 100 is released, the stop 200 is pressed against the appropriate position of the notch in the rack wheel, remove the safety plate 30, and then take out the clamp.

[0073] 4) Finally, the installation position of the installed stopper 200 is inspected using the depth dimension to confirm that the length of the stopper 200 extending from both sides of the rack wheel meets the requirements.

[0074] The rack wheel compression spring assembly fixture is economical and practical, realizes safe and reliable installation after the spring is compressed, has good assembly position accuracy, and improves assembly quality.

[0075] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that 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 rack wheel compression spring assembly fixture, characterized in that: include: A clamp body (10) comprising clamp blocks (11) arranged at both ends of a spring (100), a pin shaft (14) capable of penetrating a stopper (200) at the end of the spring (100) and fixedly connected to the clamp block (11), and a guide column slidably connecting the two clamp blocks (11); The clamping block (11) is provided with a positioning groove (111) that cooperates with the stopper (200); A safety plate (30) is mounted on the end of the stopper (200) away from the clamping block (11), and the safety plate (30) is provided with a connecting hole (31) that cooperates with the pin shaft (14); and A pull rod (20) for providing clamping force connects the two clamping blocks (11) so as to compress the spring (100) through the clamping blocks (11) so that the spring (100) is installed in the U-shaped opening of the rack wheel.

2. The rack wheel compression spring assembly fixture according to claim 1, characterized in that ； It also includes a tensioning mechanism for stabilizing the pin shaft (14), and the tensioning mechanism is installed on the side of the pin shaft (14) away from the spring (100).

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

4. The rack wheel compression spring assembly fixture according to claim 1, characterized in that; The clamping block (11) is located at the side of the positioning groove (111) and has a matching surface with an arc structure that fits with the outer wall of the stopper (200).

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

6. A rack wheel compression spring assembly fixture according to claim 5, characterized in that; The clamping block (11) is provided with an avoidance groove (112) on one side of the positioning surface A, for avoiding the circular arc section of the rack wheel.

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

8. The rack wheel compression spring assembly fixture according to claim 1, It is characterized by: The connection hole (31) formed in the safety plate (30) is an oblong hole, and a positioning piece (141) is installed at the end of the pin shaft (14) to prevent the safety plate (30) from being separated from the pin shaft (14).

9. The rack wheel compression spring assembly fixture according to claim 1, characterized in that: The clamp body (10) further comprises a locking member (15) for locking the pin shaft (14); One end of the clamp block (11) is provided with a mounting hole for inserting the pin shaft (14); the side of the clamp block (11) is provided with the locking member (15) through the locking hole; the locking member (15) can penetrate into the mounting hole and abut against the outer wall of the pin shaft (14).

10. The rack wheel compression spring assembly fixture according to claim 1, characterized in that ； The guide pillars include a plurality of guide pillars, and the plurality of guide pillars are distributed along the circumference of the pull rod (20).

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