Auxiliary device suitable for withdrawal and press fitting of subway train traction rod node

Abstract

The utility model belongs to the technical field of withdrawal and press fitting of traction rod nodes, and discloses an auxiliary device suitable for withdrawal and press fitting of subway train traction rod nodes, which is used for being matched with press fitting equipment to withdraw and press fitting the traction rod nodes installed at the two ends of a traction rod. The positioning device is used for positioning one end of the traction rod; the positioning sleeve is used for supporting the other end of the traction rod; the primary press-fitting sleeve is used for carrying out primary press-fitting on the traction rod node above the positioning sleeve; and the withdrawing press-fitting sleeve is used for carrying out secondary press-fitting and withdrawing on the traction rod node above the positioning sleeve. The press-fitting device is used for pressing down the primary press-fitting sleeve, partial installation and positioning of the traction rod node are achieved, then secondary press-fitting is completed by withdrawing the press-fitting sleeve, the press-fitting accuracy can be guaranteed, errors are reduced, and the percent of pass is improved. And in the withdrawing process, the withdrawing press-fitting sleeve is used for withdrawing, so that the equipment cost is also saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of the removal and press-fitting of traction rod joints, and particularly relates to an auxiliary device applicable to the removal and press-fitting of traction rod joints of subway trains. Background Art

[0002] During the operation of the subway, bogies are equipped, and the bogies are bolsterless welded structures. In practice, each bogie is provided with a set of traction devices. The traction device undertakes the traction force and braking force of the train, and also undertakes the lateral force (through the lateral damper), and restricts the vertical displacement of the car body and the bogie through the lifting baffle. Each set of traction devices uses two traction rods arranged in a "Z" shape. Node holes are arranged at both ends of the traction rod. The extending directions of the two node holes are perpendicular to each other, and elastic rubber nodes are installed in both node holes (also known as traction rod joints. The traction rod joint includes a node core shaft. A rubber distributed in a ring shape is arranged in the middle of the node core shaft. An outer sleeve is arranged outside the rubber, so that the middle part of the node core shaft, the rubber and the outer sleeve are jointly combined into a rod installation part. The traction rod joint is installed in the node hole of the traction rod through the rod installation part). When in use, the elastic rubber joint at one end of the traction rod is connected to the frame, and the elastic rubber joint at the other end is connected to the traction beam (bolt connection holes are arranged at both ends of the node core shaft to facilitate connection with the traction beam through the bolt connection holes), and the traction force and braking force are transmitted to the car body to realize the movement and stop of the train.

[0003] According to the requirements of the subway operation maintenance manual, during the daily inspection of the traction rod joint, it is necessary to check whether there are damages, cracks or degumming phenomena in the elastic rubber joints at both ends of the traction connecting rod. When the crack depth or detachment between the metal and the rubber of the elastic rubber joint exceeds 5 mm, and its length is greater than half of the circumference of the rubber joint, and the rubber joint becomes soft, sticky, brittle or harder, the traction rod rubber joint should be replaced during the frame repair after running for 5 years or 600,000 kilometers.

[0004] Since one end of the traction rod is connected and installed to the frame, and the other end is connected and installed to the traction beam. To facilitate the subsequent installation of the traction rod assembly after press-fitting, and to avoid excessive deflection of the core shaft during node installation, resulting in cracks in the rubber inside the node, there are certain requirements for the radial position of the core shaft on the installation surfaces of the node and the frame and the traction beam. In the prior art, generally, the traction rod and the node are manually marked respectively, and then when press-fitting on a single-column calibration hydraulic press, the marked marks on the traction rod and the node are aligned before press-fitting to ensure the radial position of the core shaft. However, through actual operation verification, the press-fitting time is long, the error is large, and the qualified rate is low after manual marking. Therefore, it is necessary to improve the removal and press-fitting technology of the elastic rubber joint. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide an auxiliary device applicable to the disassembly and press-fitting of the traction rod nodes of subway trains, so as to solve the above problems existing in the prior art.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0007] An auxiliary device applicable to the disassembly and press-fitting of the traction rod nodes of subway trains, which is used to cooperate with the press-fitting equipment to disassemble and press-fit the traction rod nodes installed at both ends of the traction rod. The auxiliary device includes:

[0008] A positioning seat for positioning one end of the traction rod;

[0009] A positioning sleeve for supporting the other end of the traction rod, and an avoidance hole that does not affect the downward movement of the traction rod node is provided in the middle of the positioning sleeve;

[0010] A primary press-fitting sleeve for performing primary press-fitting on the traction rod node above the positioning sleeve. When performing primary press-fitting on the traction rod node, the lower positioning sleeve of the primary press-fitting sleeve is sleeved on the end of the rod installation part of the traction rod node, so as to press-fit the lower part of the rod installation part into the node hole at the other end of the traction rod through the downward pressure of the press-fitting equipment; and a disassembly and press-fitting sleeve for performing secondary press-fitting and disassembly on the traction rod node above the positioning sleeve. When performing secondary press-fitting on the traction rod node, one end of the disassembly and press-fitting sleeve supports on the end of the rod installation part of the traction rod node, so as to press-fit the rod installation part into the node hole at the other end of the traction rod through the downward pressure of the press-fitting equipment; when disassembling the traction rod node, the other end of the disassembly and press-fitting sleeve supports on the end of the rod installation part of the traction rod node, so as to press the lower part of the disassembly and press-fitting sleeve against the node hole at the other end of the traction rod through the downward pressure of the press-fitting equipment, and press out the traction rod node from the node hole into the avoidance hole of the positioning sleeve through the disassembly and press-fitting sleeve.

[0011] As a preferred technical solution in the present utility model, a socket hole matching and sleeving with the end of the rod installation part is provided at the lower end of the primary press-fitting sleeve, and a positioning hole for the end of the first node core shaft is provided in the primary press-fitting sleeve above the socket hole, and the positioning hole for the end of the first node core shaft is cooperatively inserted with the end of the node core shaft.

[0012] As a preferred technical solution in the present utility model, a positioning rod is connected to one side of the primary press-fitting sleeve, a limiting plate extending upward is provided at the end of the positioning seat far from the positioning sleeve, a vertical limiting groove is provided on the limiting plate, and the end of the positioning rod far from the primary press-fitting sleeve slides vertically in the vertical limiting groove.

[0013] As a preferred technical solution in the present utility model, a limiting ring is provided on the outer wall at one end of the draw-off and press-fitting sleeve, and the diameter of the limiting ring is greater than the inner diameter of the node hole; the distance between the other end of the draw-off and press-fitting sleeve and the limiting ring is not less than the length of the node hole.

[0014] As a preferred technical solution in the present utility model, the inner diameter of the draw-off and press-fitting sleeve is smaller than the diameter of the pull rod installation part, and a second node core shaft end positioning hole is provided in the draw-off and press-fitting sleeve. When disassembling and secondarily press-fitting the pull rod node, the ends of the node core shaft of the pull rod node can be respectively and matingly inserted into the second node core shaft end positioning holes.

[0015] As a preferred technical solution in the present utility model, a central positioning groove is provided in the middle of the upper end of the positioning seat, and the node hole at one end of the pull rod is matingly clamped in the central positioning groove.

[0016] As a preferred technical solution in the present utility model, side positioning grooves are respectively provided on the positioning seats at both ends of the central positioning groove, and both ends of the node core shaft at one end of the pull rod are respectively clamped in the two side positioning grooves.

[0017] As a preferred technical solution in the present utility model, the auxiliary device further includes a jacking and flipping device, and the jacking and flipping device is installed at the lower end of the pull rod between the positioning seat and the positioning sleeve.

[0018] Beneficial effects: When press-fitting and disassembling the pull rod node of the present utility model, the positioning seat can be used to perform basic positioning on the pull rod, thereby ensuring the stability of the pull rod node at the other end of the pull rod during press-fitting and disassembling. Then, by using the press-fitting device to press down the primary press-fitting sleeve once, partial installation and positioning of the pull rod node can be achieved, which is convenient for secondary press-fitting. Then, the secondary press-fitting is completed by using the draw-off and press-fitting sleeve, which can ensure the accuracy of press-fitting, reduce errors, and improve the qualification rate. During disassembly, the draw-off and press-fitting sleeve is still used for disassembly, which also saves equipment costs. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the present utility model during primary press-fitting;

[0020] Figure 2 It is a sectional view of the present utility model during primary press-fitting;

[0021] Figure 3 It is a schematic diagram of the present utility model during disassembly;

[0022] Figure 4 It is a sectional view of the present utility model during disassembly;

[0023] Figure 5 It is a schematic diagram of the present utility model when the jacking and flipping device is provided.

[0024] In the figure: 1 - traction drawbar; 11 - node hole; 2 - traction drawbar node; 21 - drawbar mounting part; 22 - node mandrel; 3 - positioning seat; 4 - positioning sleeve; 5 - primary press - fitting sleeve; 51 - positioning rod; 6 - withdrawal press - fitting sleeve; 7 - jacking and flipping device. Specific implementation mode

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0026] Embodiment:

[0027] As Figures 1 - 5 shown, this embodiment provides an auxiliary device for the withdrawal and press - fitting of the traction drawbar nodes of subway trains, which is used to cooperate with the press - fitting equipment to perform the withdrawal and press - fitting of the traction drawbar nodes 2 installed at both ends of the traction drawbar 1. The auxiliary device includes:

[0028] A positioning seat 3, which is used to position one end of the traction drawbar 1; to ensure the stability of the traction drawbar 1, and thus ensure the stability of the traction drawbar node 2 that needs to be press - fitted or withdrawn;

[0029] A positioning sleeve 4, which is used to support the other end of the traction drawbar 1, and an avoidance hole that does not affect the downward movement of the traction drawbar node 2 is provided in the middle of the positioning sleeve 4, so as not to affect the press - fitting and withdrawal of the traction drawbar node 2;

[0030] The primary press - fitting sleeve 5 is used to perform the primary press - fitting of the traction rod joint 2 above the positioning sleeve 4. When performing the primary press - fitting of the traction rod joint 2, the lower positioning sleeve of the primary press - fitting sleeve 5 is sleeved on the end of the rod - mounting part 21 of the traction rod joint 2, and is used to press - fit the lower part of the rod - mounting part 21 into the joint hole 11 at the other end of the traction rod 1 by pressing down the primary press - fitting sleeve 5 through a press - fitting device, so as to realize the positioning and partial installation of the traction rod joint 2; and the withdrawal press - fitting sleeve 6 is used to perform the secondary press - fitting and withdrawal of the traction rod joint 2 above the positioning sleeve 4. When performing the secondary press - fitting of the traction rod joint 2, one end of the withdrawal press - fitting sleeve 6 supports on the end of the rod - mounting part 21 of the traction rod joint 2, and is used to press - fit the rod - mounting part 21 into the joint hole 11 at the other end of the traction rod 1 by pressing down the withdrawal press - fitting sleeve 6 through a press - fitting device, so as to realize the final installation of the traction rod joint 2; when withdrawing the traction rod joint 2, the other end of the withdrawal press - fitting sleeve 6 supports on the end of the rod - mounting part 21 of the traction rod joint 2, and is used to press down the withdrawal press - fitting sleeve 6 through a press - fitting device to make the lower part of the withdrawal press - fitting sleeve 6 abut against the joint hole 11 at the other end of the traction rod 1, and press out the traction rod joint 2 from the joint hole 11 into the avoidance hole of the positioning sleeve 4 through the withdrawal press - fitting sleeve 6, thereby realizing the withdrawal of the traction rod joint 2.

[0031] When the present utility model performs the press - fitting and withdrawal of the traction rod joint 2, the positioning seat 3 can be used to perform basic positioning on the traction rod 1, thereby ensuring the stability of the traction rod joint 2 at the other end of the traction rod 1 during press - fitting and withdrawal. Then, by pressing down the primary press - fitting sleeve 5 with a press - fitting device, partial installation and positioning of the traction rod joint 2 can be realized, which is convenient for secondary press - fitting. Then, the secondary press - fitting is completed by using the withdrawal press - fitting sleeve 6, which can ensure the accuracy of press - fitting, reduce errors, and improve the qualification rate. During withdrawal, the withdrawal press - fitting sleeve 6 is still used for withdrawal, which also saves equipment costs.

[0032] As a preferred implementation in this embodiment, it should be further noted that a socket hole matching and sleeving the end of the rod - mounting part 21 is opened at the lower end of the primary press - fitting sleeve 5. In this way, there is a certain distance between the primary press - fitting sleeve 5 and the joint hole 11 as the downward movement space of the primary press - fitting sleeve 5. Thus, when pressing down the primary press - fitting sleeve 5, the lower part of the rod - mounting part 21 can be driven into the joint hole 11 to realize the primary press - fitting of the traction rod joint 2. A first node core - shaft end positioning hole is opened in the primary press - fitting sleeve 5 above the socket hole, and the first node core - shaft end positioning hole is inserted and matched with the node core - shaft 22 of the traction rod joint 2 to ensure the coaxiality between the traction rod joint 2 and the primary press - fitting sleeve 5, thereby ensuring that the traction rod joint 2 can be accurately pressed down through the primary press - fitting sleeve 5.

[0033] As a preferred implementation in this embodiment, it should be further noted that a positioning rod 51 is connected to one side of the primary press-fitting sleeve 5. At the end of the positioning seat 3 away from the positioning sleeve 4, a limiting plate extending upward is provided. A vertical limiting groove is formed on the limiting plate. The end of the positioning rod 51 away from the primary press-fitting sleeve 5 slides vertically in the vertical limiting groove. Thus, by limiting the positioning rod 51 in the vertical limiting groove, the installation angle of the primary press-fitting sleeve 5 is directly locked, enabling the primary press-fitting sleeve 5 to quickly cooperate with the traction rod joint 2 and eliminating the alignment process.

[0034] As a preferred implementation in this embodiment, it should be further noted that one end of the withdrawal press-fitting sleeve 6 can be referred to as the secondary press-fitting end, and the outer wall of the other end, which can be called the withdrawal end, is provided with a limiting ring. The diameter of the limiting ring is larger than the inner diameter of the joint hole 11, which can prevent the secondary press-fitting end of the withdrawal press-fitting sleeve 6 from entering the joint hole 11. In this way, when the secondary press-fitting end of the withdrawal press-fitting sleeve 6 abuts against the joint hole 11, the joint mandrel can just be pressed down into the joint hole 11 in a matching manner; the distance between the other end of the withdrawal press-fitting sleeve 6 and the limiting ring is not less than the length of the joint hole 11, that is to say, the length of the withdrawal end is not less than the length of the joint hole 11. In this way, when withdrawing the traction rod joint 2, the joint mandrel can be completely pushed out of the joint hole 11 by the withdrawal end of the withdrawal press-fitting sleeve 6.

[0035] As a preferred implementation in this embodiment, it should be further noted that the inner diameter of the withdrawal press-fitting sleeve 6 is smaller than the diameter of the rod installation part 21. In this way, when performing withdrawal and secondary press-fitting, the rod installation part 21 can be prevented from entering the withdrawal press-fitting sleeve 6, and thus the withdrawal and secondary press-fitting of the traction rod joint 2 can be accurately realized. A second joint mandrel end positioning hole is provided in the withdrawal press-fitting sleeve 6. When performing withdrawal and secondary press-fitting on the traction rod joint 2, the ends of the joint mandrel 22 of the traction rod joint 2 can be respectively inserted into the second joint mandrel end positioning hole in a matching manner, thereby realizing the accurate positioning of the traction rod joint 2 and the withdrawal press-fitting sleeve 6 and ensuring the accuracy during withdrawal and secondary press-fitting.

[0036] As a preferred implementation in this embodiment, it should be further noted that a central positioning groove is formed in the middle of the upper end of the positioning seat 3. The joint hole 11 at one end of the traction rod 1 is engaged with the central positioning groove in a matching manner to ensure the stability of the traction rod 1.

[0037] As a preferred implementation in this embodiment, it should be further noted that side positioning grooves are formed on the positioning seat 3 at both ends of the central positioning groove. The two ends of the joint mandrel 22 at one end of the traction rod 1 are respectively engaged with the two side positioning grooves, further improving the stability of one end of the traction rod 1.

[0038] As a preferred implementation in this embodiment, it should be further noted that the auxiliary device further includes a jacking and flipping device. After the disassembly or press-fitting of the right traction rod node 2 is completed, the traction rod 1 is jacked up by the jacking and flipping device 7, and then the left and right sides of the traction rod 1 are flipped to the conversion end, and then the disassembly or press-fitting of the traction rod node 2 is carried out. Further, when the disassembly and press-fitting of the traction rod nodes 2 at both ends of the traction rod 1 are carried out, manpower can be saved and the efficiency can be improved at the same time. The jacking and flipping device can adopt the existing technology, and this application does not make specific restrictions.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An auxiliary device suitable for removing and pressing the nodes of a traction rod of a subway train, used for cooperating with a pressing device to remove and press the traction rod nodes (2) installed at both ends of the traction rod (1), characterized in that: The auxiliary device comprises: A positioning seat (3) for positioning one end of the traction rod (1); A positioning sleeve (4) is used to support the other end of the traction rod (1), and a middle portion of the positioning sleeve (4) is provided with an avoidance hole that does not affect the downward movement of the traction rod node (2); A primary press-fitting sleeve (5) is used to perform a primary press-fitting on the traction rod node (2) above the positioning sleeve (4); when the traction rod node (2) is press-fitted once, the lower positioning sleeve of the primary press-fitting sleeve (5) is connected to the end of the rod mounting portion (21) of the traction rod node (2), and the primary press-fitting sleeve (5) is pressed downward by a press-fitting device to press the lower portion of the rod mounting portion (21) into the node hole (11) at the other end of the traction rod (1); and a withdrawal press-fitting sleeve (6) is used to perform a secondary press-fitting and withdrawal on the traction rod node (2) above the positioning sleeve (4); when the traction rod node (2) is press-fitted twice, one end of the withdrawal press-fitting sleeve (6) is supported on the traction rod. The end of the rod mounting portion (21) of the rod node (2) is used to press the withdrawn press-fitting sleeve (6) downwardly by a press-fitting device so that the rod mounting portion (21) is matched and press-fitted into the node hole (11) at the other end of the traction rod (1); when the traction rod node (2) is withdrawn, the other end of the withdrawn press-fitting sleeve (6) is supported on the end of the rod mounting portion (21) of the traction rod node (2) so that the lower part of the withdrawn press-fitting sleeve (6) is abutted against the node hole (11) at the other end of the traction rod (1) by a press-fitting device to press the withdrawn press-fitting sleeve (6) downwardly, and the traction rod node (2) is pressed out of the node hole (11) into the avoidance hole of the positioning sleeve (4) by the withdrawn press-fitting sleeve (6).

2. The auxiliary device for removing and pressing the traction rod node of a subway train according to claim 1 is characterized in that: The lower end of the one-time press-fitting sleeve (5) is provided with a socket hole that matches and sockets with the end of the pull rod mounting portion (21), and a first node core shaft end positioning hole is provided in the one-time press-fitting sleeve (5) above the socket hole, and the first node core shaft end positioning hole is matched and plugged with the end of the node core shaft (22).

3. An auxiliary device for removing and pressing a traction rod node of a subway train according to claim 1 or 2, characterized in that: A positioning rod (51) is connected to one side of the primary press-fitting sleeve (5); an end of the positioning seat (3) away from the positioning sleeve (4) is provided with a limiting plate extending upward, a vertical limiting groove is provided on the limiting plate, and an end of the positioning rod (51) away from the primary press-fitting sleeve (5) slides in the vertical limiting groove along the vertical direction.

4. The auxiliary device for removing and pressing the traction rod node of a subway train according to claim 1 is characterized in that: A limiting ring is provided on the outer wall of one end of the pressure-removing sleeve (6), the diameter of the limiting ring being larger than the inner diameter of the node hole (11); and the distance between the other end of the pressure-removing sleeve (6) and the limiting ring is not less than the length of the node hole (11).

5. An auxiliary device for removing and pressing a traction rod node of a subway train according to claim 1 or 4, characterized in that: The inner diameter of the withdrawn and pressed sleeve (6) is smaller than the diameter of the rod mounting portion (21), and a second node core shaft end positioning hole is provided in the withdrawn and pressed sleeve (6). When the traction rod node (2) is withdrawn and pressed for a second time, the end of the node core shaft (22) of the traction rod node (2) can be matched and inserted into the second node core shaft end positioning hole.

6. The auxiliary device for removing and pressing the traction rod node of a subway train according to claim 1 is characterized in that: A central positioning groove is provided in the middle of the upper end of the positioning seat (3), and a node hole (11) at one end of the traction rod (1) is matched and clamped in the central positioning groove.

7. The auxiliary device for removing and pressing the traction rod node of a subway train according to claim 6 is characterized in that: The positioning seats (3) at both ends of the central positioning groove are provided with side positioning grooves, and both ends of the node core shaft (22) located at one end of the traction rod (1) are respectively clamped in the two side positioning grooves.

8. The auxiliary device for removing and pressing the traction rod node of a subway train according to claim 1 is characterized in that: The auxiliary device also includes a lifting and flipping device, which is installed at the lower end of the traction rod (1) between the positioning seat (3) and the positioning sleeve (4).

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