Anti-overshoot backstop disassembly and assembly auxiliary device of subway bogie and operation method of anti-overshoot backstop disassembly and assembly auxiliary device

Abstract

The invention discloses an anti-overshoot backstop dismounting auxiliary device of a subway bogie, the bogie comprises a hoisting pad and a traction pin seat, a gap is formed between the hoisting pad and the traction pin seat, the anti-overshoot backstop dismounting auxiliary device is characterized by comprising a clamping piece, the clamping piece comprises a clamping piece blocking rod, a clamping piece clamping block, a clamping piece clamping block and a clamping piece clamping block, and the clamping piece clamping block is connected with the clamping piece clamping block. The length of the blocking rod of the clamping piece is matched with the size of the hoisting pad; the clamping piece extension arm is connected with the clamping piece blocking rod; the clamping piece clamping jaw is connected with the clamping piece extension arm, the clamping piece clamping jaw and the hoisting pad form a contact surface, and the clamping piece clamping jaw suspends the anti-overshoot backstop dismounting auxiliary device on the gap through the contact surface; the stopping piece is connected with the clamping piece through a shaft, the stopping piece rotates on the clamping piece through the shaft, and the angle of the adjusting pad is adjusted through the stopping piece.

Description

Technical Field

[0001] This application relates to the field of rail transit, and specifically to the field of maintenance of urban rail transit vehicles. Background Art

[0002] To ensure the driving safety and performance stability of rail transit, trains will regularly travel to various maintenance bases for inspection. In particular, it is necessary to inspect the bogies of the trains. A center pin is provided on each bogie. As an important part of the bogie, the main functions of the center pin include: traction function, the axle traction force generated by the bogie is transmitted to the car body through the center pin, thus playing the role of a traction pin; slewing function, the center pin can slewing flexibly relative to the bogie frame. When the vehicle passes through a curve, relying on the slewing of the center pin, the car body and the bogie rotate relative to each other, so as to pass through the curve smoothly; load-bearing function, the center pin bears the weight transmitted from the car body and is transmitted to the bogie through a spherical plain bearing. An overrun stop is provided at the lower end of the center pin, and the overrun stop can prevent the over-inflation of the air spring and the abnormal rise of the car body caused by the failure of the height valve. Therefore, when inspecting the bogie of the train, it is necessary to specifically inspect the center pin and the clearance of the overrun stop. If the bolts of the center pin and the overrun stop are loose or fall off, it will cause deformation or displacement of the connected parts at least, and may even cause serious damage to the subway system and seriously affect the operation safety. However, in order to carry out the inspection smoothly, when the dimensions of the fastening bolts of the center pin and the clearance of the overrun stop exceed the standard and cannot be adjusted, it is necessary to disassemble the overrun stop.

[0003] In the prior art, if it is necessary to disassemble the overrun stop, it is necessary to first remove the fixing bolts of the overrun stop. However, due to the action of gravity, the operator needs to hold it up with both hands and slowly remove the overrun stop and the adjustment pad of the overrun stop. After the inspection is completed and it is cleaned, then hold up the overrun stop and the adjustment pad with both hands to the installation position and tighten the bolts and apply anti-loosening marks. The content of this operation requires at least multiple operators to complete together. And because the overrun stop has a certain weight, there are certain requirements for the physical fitness of the maintenance personnel. And the operator is in a single working state for a long time, and the physical strength is consumed too much, which will also affect the decline of work efficiency. Due to the heavy weight and long-term fatigue state, if it accidentally falls, it will cause certain harm to the personal safety of the operator, and there are risk factors. Summary of the Invention

[0004] To solve the above problems, the purpose of this application is to provide an auxiliary device and operation method for disassembling and assembling the overrun stop of a subway bogie, which can shorten the working hours required for disassembling and assembling the overrun stop and improve the work efficiency of maintenance personnel.

[0005] The embodiment of the present application provides an auxiliary device for disassembling and assembling an anti-overrun stop of a subway bogie. The bogie includes a lifting pad and a traction pin seat, and a gap is formed between the lifting pad and the traction pin seat. The auxiliary device for disassembling and assembling the anti-overrun stop includes:

[0006] A clamping member, which includes:

[0007] A clamping member lever, the length of which is matched with the size of the lifting pad;

[0008] A clamping member extension arm, which is connected to the clamping member lever;

[0009] A clamping member claw, which is connected to the clamping member extension arm. The clamping member claw forms a contact surface with the lifting pad, and the anti-overrun stop disassembly and assembly auxiliary device is suspended on the gap through the contact surface;

[0010] A stop member, which is connected to the clamping member through a shaft. The stop member rotates on the clamping member through the shaft, and the stop member adjusts the angle of the adjusting pad.

[0011] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the stop member further includes an anti-disengagement elbow, and the anti-disengagement elbow forms an angle with the end of the stop member.

[0012] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the included angle between the anti-disengagement elbow and the end of the stop member is 120° to 150°.

[0013] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the anti-disengagement elbow and the stop member are integrally formed.

[0014] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the shaft is a threaded screw.

[0015] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the length of the clamping member claw is 10 mm and the thickness is 2 mm.

[0016] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the length of the contact surface is 9.5 mm and the width is 10 mm.

[0017] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the length of the clamping member extension arm is 110 mm.

[0018] Further, for the auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie, the length of the clamping member lever is 181 mm.

[0019] The present application also discloses an operation method of an auxiliary device for disassembling and assembling an overshoot stop of a subway bogie. Using the auxiliary device for disassembling and assembling an overshoot stop of a subway bogie as described above, the method includes the following steps:

[0020] S1) Embedding the clamping jaws of the clamping member of the auxiliary device for disassembling and assembling the overshoot stop into the gap formed between the lifting pad and the traction pin seat;

[0021] S2) Removing the fixing bolts of the overshoot stop, and supporting the removed overshoot stop and the adjusting pad with the auxiliary device for disassembling and assembling the overshoot stop;

[0022] S3) Inspecting the center pin bolts and the clearance of the overcharge stop;

[0023] S4) Rotating the stop member through a shaft and adjusting the clearance size of the overcharge stop;

[0024] S5) Installing the fixing bolts of the overshoot stop and removing the auxiliary device for disassembling and assembling the overshoot stop to complete the inspection and repair.

[0025] The technical solution provided by the embodiment of the present application has the following advantages:

[0026] 1. Due to the use of the clamping jaws of the clamping member, it can be conveniently embedded into the semi-circular gap between the lifting pad and the traction pin seat;

[0027] 2. Due to the use of the stop member with a size matching that of the lifting pad, it is ensured that the stop member will not fall off the lifting pad;

[0028] 3. Due to the use of the anti-disconnection elbow, it can effectively prevent potential safety hazards caused by the overcharge stop and the adjusting pad falling due to instability;

[0029] 4. Due to the use of the shaft connection between the clamping member and the stop member, it is not only convenient to carry, but also can adjust the adjusting pad on the device, thereby realizing rapid adjustment of the clearance size of the overcharge stop and facilitating installation;

[0030] 5. Since the clamping member and the stop member are connected by a threaded screw rod, it is convenient for disassembly and carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A 、 1B and 1C are schematic diagrams of a bogie preferably used in an embodiment of the present invention;

[0032] Figure 2A 、 2B are schematic diagrams of an auxiliary device for disassembling and assembling an overshoot stop of a subway bogie preferably used in an embodiment of the present invention;

[0033] Figure 3Schematic diagram of the installation of the anti-overrun stop disassembly and assembly auxiliary device and the lifting pad, which is preferred in the embodiments of the present invention;

[0034] Figure 4 Schematic diagram of the size of the clamping part in the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device, which is preferred in the embodiments of the present invention;

[0035] Figure 5 Schematic diagram of the size of the stop part in the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device, which is preferred in the embodiments of the present invention;

[0036] Figure 6 Schematic diagram of the force on the clamping part in the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device, which is preferred in the embodiments of the present invention;

[0037] Figure 7 Flowchart of the operation method of the anti-overrun stop disassembly and assembly auxiliary device for the subway bogie, which is preferred in the embodiments of the present invention.

[0038] Reference signs:

[0039] Lifting pad A;

[0040] Traction pin seat B;

[0041] Center pin bolt C;

[0042] Clearance D;

[0043] Anti-overrun stop E;

[0044] Adjusting pad F;

[0045] Anti-overrun stop fixing bolt G;

[0046] Clamping part 1;

[0047] Clamping part lever 11;

[0048] Clamping part extension arm 12;

[0049] Clamping part claw 13;

[0050] Contact surface 131;

[0051] Stop part 2;

[0052] Anti-disengagement elbow 21. Detailed implementation manners

[0053] To make the objectives, technical solutions, and advantages of the present application more clear, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0054] In addition, it should be noted that, unless otherwise clearly specified and limited, the similar terms such as "installation", "connection", and "coupling" used in the description of the present application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two elements. Those skilled in the art can understand its specific meaning in the present application according to the specific situation.

[0055] Figure 1A 、 1B and 1C is a schematic diagram of a bogie preferably used in the embodiment of the present invention. As Figures 1A to 1C shown, the existing bogie includes a lifting pad A and a drawbar pin seat B, and a center pin bolt C is used to fasten the lifting pad A. A gap D is formed between the lifting pad A and the drawbar pin seat B, and an anti-overrun stop E and an adjusting pad F are arranged below the center pin bolt C through an anti-overrun stop fixing bolt G. In this embodiment, it is preferred to set four anti-overrun stop fixing bolts G.

[0056] Figure 2A and Figure 2B is a schematic diagram of an auxiliary device for disassembling and assembling the anti-overrun stop of a subway bogie preferably used in the embodiment of the present invention. Figure 3 is a schematic diagram of the installation of the auxiliary device for disassembling and assembling the anti-overrun stop and the lifting pad preferably used in the embodiment of the present invention. As Figure 2A 、 2B and Figure 3As shown in the figure, the anti-overrun stop disassembly and assembly auxiliary device includes: a clamping member 1, and the clamping member 1 includes: a clamping member lever 11, and the length of the clamping member lever 11 matches the size of the lifting pad A; a clamping member extension arm 12, and the clamping member extension arm 12 is connected to the clamping member lever 11. A clamping member claw 13, the clamping member claw 13 is connected to the clamping member extension arm 12, the clamping member claw 13 forms a contact surface 131 with the lifting pad A, and the clamping member claw 13 suspends the anti-overrun stop disassembly and assembly auxiliary device on the gap D through the contact surface 131. A stop member 2, and the stop member 2 is connected to the clamping member 1 through a shaft, the stop member 2 rotates on the clamping member 1 through the shaft, and the stop member 2 adjusts the angle of the adjusting pad. In this embodiment, preferably, the shaft can be installed at the central opening H of the clamping member 1 and the stop member 2. Preferably, the shaft can be a threaded screw. The connection through the threaded screw is convenient for disassembly and easy to carry.

[0057] The stop member further includes an anti-disengagement elbow 21, and the anti-disengagement elbow 21 forms an angle with the end of the stop member 2. To ensure the safety hazard caused by the overcharge stop E and the adjusting pad F falling due to instability, the included angle between the anti-disengagement elbow 21 and the end of the stop member 2 is 120° to 150°, and a preferred embodiment is 120°. Among them, the anti-disengagement elbow 21 can be an additional component provided on the stop member 2 or integrally formed with the stop member 2. In this embodiment, preferably, the anti-disengagement elbow 21 is integrally formed with the stop member 2.

[0058] Figure 4 It is a schematic diagram of the clamping member size of the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device preferably in the embodiment of the present invention. Figure 5 It is a schematic diagram of the stop member size of the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device preferably in the embodiment of the present invention. Figure 6 It is a schematic diagram of the force on the clamping member of the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device preferably in the embodiment of the present invention. The following is an elaboration on the application embodiment of the anti-overrun stop disassembly and assembly auxiliary device preferably in the embodiment of the present invention with reference to the drawings. The anti-overrun stop disassembly and assembly auxiliary device is mainly designed according to the actual on-site operation requirements. Therefore, the main material of the device is selected as ordinary hard stainless steel, and the total mass is only 0.27 kg. The device is respectively composed of two independent parts fixed and connected by bolts and has a 360° rotatable function, which is convenient for carrying and flexible to operate.

[0059] After measurement, the weight of the anti-overrun stop E is 9.1 Kg, and the weight of the adjusting pad F is 0.52 Kg, a total of 4 pieces. Therefore, the resultant force F on the lower bottom surface of the device is:

[0060] F = (9.1 + 0.52 * 4) × 9.8 = 109.57 N;

[0061] In this embodiment, preferably, the diameter of the lifting pad A is 180 mm, the length of the clamping part lever 11 is 181 mm, and the height of the inner wall is 106 mm, and the component forces F1 and F2 can be obtained.

[0062]

[0063] The length of the contact surface 131 is 9.5 mm, and the width is 10 mm. The contact area S between the clamping part claw 13 and the lifting pad A:

[0064] S = 0.0095×0.01 = 9.5×10 -6 m 2 ;

[0065] Thus, the theoretical contact pressure P1 between the clamping part claw 13 and the lifting pad A can be obtained:

[0066]

[0067] Referring to the "Mechanical Design Handbook", it can be known that the shear strength K of the hard stainless steel material S = 56 kg / mm 2 , that is, σ s = 548.8 MPa, while the theoretical contact pressure P1 between the auxiliary device claw and the lifting pad is 7.98 MPa, P1 << σ s , so the strength of the anti-overrun stop disassembly and assembly auxiliary device meets the design requirements and can be used.

[0068] Since the lifting pad A is fastened by the center pin bolt C, and when using the anti-overrun stop disassembly and assembly auxiliary device, the clamping part claw 13 of the clamping part 1 will contact the upper surface of the lifting pad A to form the contact surface 131, so the center pin bolt C needs to bear additional weight. To ensure that the use of the anti-overrun stop disassembly and assembly auxiliary device does not exceed the yield limit of the center pin bolt C, the strength of the center pin bolt C needs to be checked.

[0069] Referring to the "Mechanical Design Handbook", it can be known that the tensile strength σ of the M36×110 stainless steel hexagon bolt with a strength of 10.9 grade b = 1000 MPa. Given that the weight of the lifting pad A is 4.12 Kg, the tension P2 on the center pin bolt after using the auxiliary device can be calculated as follows:

[0070]

[0071] P2 << σ b , so the tension on the center pin bolt after using the auxiliary device still meets the strength requirements.

[0072] After comparing many schemes, this design is finally adopted. The specific reasons can be seen in the following table:

[0073] Comparison table of solutions for disassembly and assembly auxiliary devices for anti-overshoot stops of subway bogies

[0074]

[0075] When in use, this embodiment is preferred, and the gap D is a semi-arc opening between the lifting pad A and the traction pin seat B, with a left-right gap of 7 mm and a top-bottom gap of 4 mm. The clamping claw 13 of the anti-overshoot stopper disassembly and assembly auxiliary device is first rotated from a single-sided opening to fit into the gap, and then the claw on the other side is turned into the gap on the other side. At this point, the installation is completed, and the anti-overshoot stopper disassembly and assembly auxiliary device is successfully suspended on the lifting pad.

[0076] Figure 7 The present invention also discloses an operating method of the anti-overshoot stopper disassembly and assembly auxiliary device for a subway bogie, using the anti-overshoot stopper disassembly and assembly auxiliary device for a subway bogie as described above, comprising the steps of:

[0077] S1) inserting the clamping claw of the anti-overshoot stopper disassembly and assembly auxiliary device into a gap between the lifting pad and the traction pin seat;

[0078] S2) removing the fixing bolts of the anti-overshoot stopper, and supporting the removed anti-overshoot stopper and the adjustment pad using an anti-overshoot stopper disassembly and assembly auxiliary device;

[0079] S3) Check the center pin bolt and the overcharge prevention stop gap;

[0080] S4) rotating the stopper through the shaft and adjusting the gap size of the overcharge prevention stopper;

[0081] S5) Install the fixing bolts of the anti-overshoot stopper and remove the anti-overshoot stopper disassembly and assembly auxiliary device to complete the inspection.

[0082] Specifically, after on-site field operation test operation steps:

[0083] 1) The clamping claw 13 of the anti-overshoot stop disassembly and assembly auxiliary device has a length of 10 mm and a thickness of 2 mm, and can be smoothly embedded in the semi-arc gap between the lifting pad and the traction pin seat;

[0084] 2) The inner width of the clamping part 1 is 181 mm, which matches the size of the lifting pad A with a diameter of 180 mm, and also ensures that the anti-overshoot stopper disassembly and assembly auxiliary device will not fall off the lifting pad;

[0085] 3) The length of the extension arm 12 of the clamp is 110 mm. This design can also ensure that the overcharge prevention stopper can be supported during the disassembly process, and the center pin bolt and adjustment gasket operation can be observed after complete disassembly;

[0086] 4) During on-site use, the actual pulling force measured by a spring dynamometer is 160 N, and the device has no deformation, which is equivalent to the weight of a 16.3 kg load. It is already close to 150% of the weight of the anti-overcharge stop E plus four adjusting pads F (11.2 kg), which is consistent with the theoretical calculation;

[0087] 5) The anti-detachment design of the 120° elbow of the stop member 2 can effectively prevent potential safety hazards caused by the unstable falling of the anti-overcharge stop E and the adjusting pad F;

[0088] 6) The clamping member 1 and the stop member 2 are connected by a shaft and can rotate 360°. It is not only convenient to carry, but the main purpose is to be able to adjust the adjusting pad F on the device, so as to quickly adjust the clearance size of the anti-overcharge stop E and facilitate installation;

[0089] 7) Through the calculation of a round of actual disassembly and assembly process, the goal of basically shortening the disassembly and assembly man-hour of a single anti-overcharge stop from the original 14 minutes per piece to 10 minutes per piece, and the overall man-hour is shortened by nearly 30% has been basically achieved.

[0090] The anti-overcharge stop disassembly and assembly auxiliary device and operation method for subway bogies disclosed in this application can complete production tasks more efficiently, timely and safely. Through the comparison of the operations before and after, the use of the auxiliary device has optimized the disassembly and assembly operation process of the anti-overcharge stop, omitted the intermediate handling process, reduced the operation intensity of maintenance personnel, and improved the safety protection. Moreover, the working efficiency of checking the center pin bolt and the clearance of the anti-overcharge stop has also been significantly improved, providing reliable logistical support for the normal operation of the train.

[0091] The above embodiments are provided for those skilled in the art to implement or use this application. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the application idea of this application. Therefore, the protection scope of this application is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. An auxiliary device for disassembling and assembling the anti-overrun stop of a subway bogie. The bogie includes a lifting pad and a traction pin seat, and a gap is formed between the lifting pad and the traction pin seat. It is characterized in that, The anti-overrun stop disassembly and assembly auxiliary device includes: A clamping member, and the clamping member includes: A clamping member lever, and the length of the clamping member lever matches the size of the lifting pad; A clamping member extension arm, and the clamping member extension arm is connected to the clamping member lever; A clamping member claw, and the clamping member claw is connected to the clamping member extension arm. The clamping member claw forms a contact surface with the lifting pad, and the anti-overrun stop disassembly and assembly auxiliary device is suspended on the gap through the contact surface by the clamping member claw; A stop member, and the stop member is connected to the clamping member by a shaft. The stop member rotates on the clamping member through the shaft, and the stop member adjusts the angle of the adjusting pad.

2. The disassembly and assembly auxiliary device for the overshoot prevention stopper of the subway bogie according to claim 1, characterized in that, The stop member further includes an anti-disengagement elbow, and the anti-disengagement elbow forms an angle with the end of the stop member.

3. The auxiliary device for disassembling and assembling the overshoot prevention stopper of the subway bogie according to claim 1, wherein, The included angle between the anti-disengagement elbow and the end of the stop member is 120° to 150°.

4. The auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie according to claim 1, characterized in that, The anti-disengagement elbow and the stop member are integrally formed.

5. The auxiliary device for disassembling and assembling the overshoot prevention stop of the subway bogie according to claim 1, characterized in that, The shaft is a threaded screw.

6. The disassembly and assembly auxiliary device for the overshoot prevention stopper of the subway bogie according to claim 1, characterized in that, The length of the clamping member claw is 10 mm and the thickness is 2 mm.

7. The auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie according to claim 1, wherein, The length of the contact surface is 9.5 mm and the width is 10 mm.

8. The disassembly and assembly auxiliary device for the overshoot prevention stopper of the subway bogie according to claim 1, characterized in that, The length of the clamping member extension arm is 110 mm.

9. The auxiliary device for disassembling and assembling the anti-overrun stop of the subway bogie according to claim 1, characterized in that, The length of the clamping member lever is 181 mm.

10. An operating method of an auxiliary device for disassembling and assembling an anti-overrun stop of a subway bogie, using the auxiliary device for disassembling and assembling an anti-overrun stop of a subway bogie according to any one of claims 1-9, characterized in that, It includes steps: S1) Insert the clamping member claw of the anti-overrun stop disassembly and assembly auxiliary device into the gap formed between the lifting pad and the traction pin seat; S2) Disassemble the anti-overrun stop fixing bolt, and support the disassembled anti-overrun stop and the adjusting pad with the anti-overrun stop disassembly and assembly auxiliary device; S3) Repair the center pin bolt and the anti-overcharge stop gap; S4) Rotate the stop member through the shaft and adjust the gap size of the anti-overcharge stop; S5) Install the fixing bolt of the anti-overrun stop and remove the anti-overrun stop disassembly and assembly auxiliary device to complete the repair.

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