Gearbox disassembling device

Abstract

The utility model relates to a gearbox disassembling device, which comprises a connecting piece, a connecting piece, a connecting piece and a connecting piece, the withdrawing part is installed on the connecting part and movably connected with the first side face of the gear shaft, the central axis of the withdrawing part coincides with the central axis of the gear shaft, the withdrawing part drives the gear shaft to move relative to the gearbox body in the preset direction in the moving process, and the preset direction is the direction deviating from a bearing assembly on the second side of the gear shaft. The second side of the gear shaft is withdrawn from the bearing assembly. According to the utility model, an effective supporting point can be provided for withdrawal of the pinion shaft in the disassembly process, so that the operation difficulty is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing equipment, and particularly relates to a gear box disassembly device. Background Art

[0002] During the fourth-level repair of the EMU gearbox, the pinion shaft needs to be removed from the gearbox and disassembled to inspect and repair the various components. Figure 1 As shown, the assembly structure of the gearbox pinion shaft includes a pinion shaft 1 and a gearbox housing 2. The side of the pinion shaft 1 close to the wheel is the PW side, and the side close to the motor is the PM side. Figure 1 As shown in the figure, the top of the pinion shaft 1 is the PW side, and the bottom is the PM side. The PW side and PM side of the pinion shaft 1 are respectively installed in the gearbox housing 2 through a set of bearing assemblies, the bearing assembly on the PW side includes a ball bearing 3, a cylindrical bearing 4 and a bearing seat 5, and the bearing assembly on the PM side includes a cylindrical bearing 6 and a bearing seat 7. A bearing cover 8 and a sealing cover 9 are sequentially installed outside the PM side bearing seat 7 by bolts, and a pinion pressure cover 10 and a sealing cover 11 are sequentially installed outside the PW side bearing seat 5 by bolts.

[0003] When disassembling the gearbox, it is necessary to first remove the bearing cover 8 and sealing cover 9 on the PM side of the pinion shaft and the pinion pressure cover 10 and sealing cover 11 on the PW side, and then remove the ball bearing 3, cylindrical bearing 4 on the PW side and the outer ring of the PM side cylindrical bearing 6 before the pinion shaft 1 can be completely removed from the gearbox housing 2.

[0004] However, in actual operation, the outer rings of the ball bearing 3, cylindrical bearing 4, and cylindrical bearing 6 on the PW side of the pinion shaft 1 and the corresponding bearing seat 5 on the PW side and bearing seat 7 on the PM side are in conflict, so they cannot be removed further. With the traditional pulling and unloading method, the space on both sides of the pinion shaft 1 is limited, and there is no fixed gripping point for unloading, so the bearings or bearing outer rings outside the pinion shaft 1 cannot be unloaded. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a gear box disassembly device, which can provide an effective support point for the withdrawal of the pinion shaft during the disassembly process, thereby reducing the difficulty of operation and improving the operation efficiency.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] A gearbox disassembly device, comprising:

[0008] A connecting piece, fixedly connected to the gear box body;

[0009] A withdrawal piece is installed on the connecting piece and is movably connected to the first side surface of the gear shaft. The central axis of the withdrawal piece and the gear shaft coincide. During the movement of the withdrawal piece, the gear shaft is driven to move along a preset direction relative to the gear box body. The preset direction is the direction away from the bearing assembly on the second side of the gear shaft, so that the second side of the gear shaft can be withdrawn from the bearing assembly.

[0010] Furthermore, when the withdrawing member moves, the relative position between the withdrawing member and the connecting member remains unchanged.

[0011] Furthermore, the connecting member includes a fixed chassis, a fixed plate and two connecting beams. The fixed chassis is detachably connected to the side of the gear box body. The two connecting beams are installed on the fixed chassis. The fixed plate is installed between the two connecting beams. After installation, the fixed plate is placed on the outer side of the first side of the gear shaft, and the removal member is installed on the fixed plate.

[0012] Furthermore, the fixed plate is parallel to the fixed chassis, the fixed plate and the two connecting beams form a door-shaped structure, and the withdrawal member is installed at the center point of the fixed plate.

[0013] Furthermore, the fixed chassis is a circular plate-shaped structure.

[0014] Furthermore, the fixed chassis is provided with a plurality of first bolt holes, which are fixedly connected to the process holes on the side surface of the gear box body by bolts.

[0015] Furthermore, the plurality of first bolt holes are evenly and discontinuously arranged along the circumference of the fixed chassis.

[0016] Furthermore, the connecting piece is a height-adjustable structure, and the height of the connecting piece is adjusted according to the height difference between the first side surface of the gear shaft and the side surface of the gear box body.

[0017] Furthermore, the withdrawing piece is a bolt, and a second bolt hole is opened on the connecting piece. The withdrawing piece is inserted into the second bolt hole and extends in the direction of the gear shaft. The other end of the withdrawing piece is threadedly connected with the central threaded hole on the first side surface of the gear shaft. When the withdrawing piece rotates, it drives the gear shaft to move along a preset direction.

[0018] Further, the first side is the PM side of the pinion shaft, the second side is the PW side of the pinion shaft, and the bearing assembly includes a ball bearing, a cylindrical bearing and a bearing seat installed on the PW side of the pinion shaft.

[0019] In summary, the gearbox disassembly device provided by the present invention has the following advantages compared with the prior art:

[0020] (1) The disassembly device is mainly used for disassembling the gearbox of rail transit vehicles. The pinion shaft 1 can only be taken out after the outer ring of the ball bearing 3 and the cylindrical bearing 4 on the PW side are removed. However, the space on both sides of the pinion shaft 1 is limited, there is no fixed gripping point for removal, and the existing removal device cannot be used for removal. The disassembly device uses a connector from the PM side to fix the connection with the gearbox housing, providing an effective support point for the removal of the pinion shaft, and removing the pinion shaft from the PM side.

[0021] (2) The disassembly device can provide an effective support point during the removal process of the pinion shaft, reduce the difficulty of operation, improve the work efficiency, ensure the disassembly quality of the gearbox and the removal quality of the pinion shaft, avoid scratches on the product after violent removal and make it unusable, reduce costs, and reduce the impact on the production cycle and cost of the current vehicle.

[0022] (3) The disassembly device has a simple structure and is reliable and stable to use. It can meet the maintenance requirements of the gearbox and ensure the reliability of the maintenance of the pinion shaft components of the rail vehicle gearbox.

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] In the attached picture:

[0026] Figure 1 It is a schematic diagram of the assembly structure of a pinion shaft in the prior art;

[0027] Figure 2 It is a structural schematic diagram of the connecting piece of the utility model;

[0028] Figure 3 It is a schematic diagram of the installation structure of the decomposition device of the utility model.

[0029] In the figure:

[0030] Pinion shaft 1, threaded hole 101, gear box body 2, ball bearing 3, cylindrical bearing 4, bearing seat 5, cylindrical bearing 6, bearing seat 7, bearing cover 8, sealing cover 9, pinion pressure cover 10, sealing cover 11;

[0031] Connecting piece 12 , fixed chassis 121 , fixed plate 122 , connecting beam 123 , first bolt hole 124 , bolt 125 , second bolt hole 126 , withdrawing piece 13 , bolt 131 .

[0032] It should be noted that the drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] like Figures 1 to 3 As shown, the utility model provides a gearbox disassembly device, which is used to disassemble the gearbox, and more specifically, to remove and separate the pinion shaft 1 from the gearbox housing 2 during the disassembly process. The PW side and the PM side of the pinion shaft 1 are respectively installed in the gearbox housing 2 through a group of bearing assemblies, the bearing assembly on the PW side includes a ball bearing 3, a cylindrical bearing 4 and a bearing seat 5, the bearing assembly on the PM side includes a cylindrical bearing 6 and a bearing seat 7, a bearing cover 8 and a sealing cover 9 are sequentially installed outside the PM side bearing seat 7 by bolts, and a pinion pressure cover 10 and a sealing cover 11 are sequentially installed outside the PW side bearing seat 5 by bolts.

[0037] When the gearbox needs to be disassembled and the pinion shaft needs to be removed, the ball bearing 3 and the outer ring of the cylindrical bearing 4 on the PW side need to be removed before the pinion shaft 1 can be taken out. However, there is no fixed point on the PW side of the pinion shaft 1, and the traditional removal device cannot be used for removal.

[0038] In this embodiment, the disassembly device includes a connecting member 12 and a withdrawing member 13 .

[0039] The connecting member 12 is fixedly connected to the PM side of the gear box housing 2 , and the function of the connecting member 12 is to provide a supporting point for the withdrawing member 13 .

[0040] The withdrawing piece 13 is installed on the connecting piece 12 and is movably connected to the first side surface of the pinion shaft 1, which refers to the PM side surface of the pinion shaft 1. The withdrawing piece 13 coincides with the central axis of the pinion shaft 1. During the movement of the withdrawing piece 13, the pinion shaft 1 is driven to move relative to the gearbox housing 2 along a preset direction, which is the direction away from the bearing assembly on the second side of the pinion shaft 1 (the second side refers to the PW side), so that the PW side of the pinion shaft 1 can be withdrawn from the bearing assembly on the PW side, and the pinion shaft 1 can be separated from the gearbox housing 2, thereby completing the disassembly of all components of the gearbox.

[0041] In this embodiment, when the unloading member 13 moves, the relative position between the unloading member 13 and the connecting member 12 remains unchanged, and only the pinion shaft 1 is driven to move axially, thereby changing the relative position relationship between the pinion shaft 1 and the gear box housing 2. This is conducive to simplifying the structure of the device and ensuring the unloading quality.

[0042] In this embodiment, the connecting member 12 includes a fixed chassis 121, a fixed plate 122 and two connecting beams 123. The fixed chassis 121 is detachably connected to the PM side of the gear box housing 2. The two connecting beams 123 are installed on the fixed chassis 121. The fixed plate 122 is installed between the two connecting beams 123. After installation, the fixed plate 122 is placed on the outer side of the PM side of the pinion shaft 1, and the removal member 13 is installed on the fixed plate 122.

[0043] In this embodiment, further, the fixed plate 122 is parallel to the fixed chassis 121, and the fixed plate 122 and the two connecting beams 123 form a gate-shaped structure after installation. The two connecting beams 123 are preferably installed vertically on the fixed chassis 121, and the removal piece 13 is installed at the center point of the fixed plate 122 to ensure that the center axis of the removal piece 13 and the pinion shaft 1 coincide.

[0044] The height of the gate-shaped structure is used to adapt to the length of the pinion shaft 1 protruding from the gearbox housing 2. The lengths of the pinion shaft 1 protruding from the gearbox housing 2 are different for gearboxes of different models and specifications, and different connectors 12 are suitable for gearboxes of different specifications and models.

[0045] In this embodiment, another implementation method is provided for the connecting member 12. The connecting member 12 adopts a height-adjustable structure, that is, the connecting beam 123 is designed to be a height-adjustable structure, such as a telescopic structure of a sleeve type, and a locking member is provided on the telescopic structure to firmly lock the connecting beam 123 at a required height. The height of the connecting beam 123 is adjusted according to the height difference between the PM side of the pinion shaft 1 and the PM side of the gear box housing 2, ensuring that the fixing plate 122 is located outside the PM side of the pinion shaft 1 after installation, so as to provide space for installation and movement of the removal member 13.

[0046] In order to cooperate with the side of the gearbox housing 2, the fixed chassis 121 preferably adopts a circular plate structure, the inner diameter of the fixed chassis 121 matches the inner ring diameter of the first side of the gearbox housing 2, and is completely fitted with the side of the gearbox housing 2. There are multiple first bolt holes 124 on the fixed chassis 121, which are fixedly connected to the process holes on the gearbox housing 2 by bolts 125.

[0047] Furthermore, a plurality of first bolt holes 124 are evenly and discontinuously arranged along the circumference of the fixed chassis 121 to ensure that the gearbox housing 2 is firmly fixed during the removal process, and to provide a support point with sufficient strength for the force required for removal. In this embodiment, it is preferred to set four first bolt holes 124 on the fixed chassis 121, and to use four bolts 125 to fix it to the gearbox housing 2.

[0048] Regarding the fixed chassis 121, this embodiment also provides another implementation method, the inner diameter of the fixed chassis 121 can match the inner diameter of the first side of the smallest gearbox housing 2, and only needs to be larger than the diameter of the largest gear shaft 1, and the outer diameter of the fixed chassis 121 can be larger than the outer diameter of the first side of the gearbox housing 2. After installation, the fixed chassis 121 can partially fit with the first side of the gearbox housing 2. In this way, multiple circles of first bolt holes 124 can be set on the fixed chassis 121 for connection with gearbox housings 2 of different specifications, suitable for gearboxes of different specifications and sizes, and increase the versatility of the connector 12.

[0049] In this embodiment, the removal member 13 is a bolt 131, and a second bolt hole 126 is opened at the center point of the fixing plate 122 of the connecting member 12. The removal member 12 is inserted into the second bolt hole 126 and extends in the direction of the pinion shaft 1. The bolt head of the bolt 131 is placed on the outside of the fixing plate 122, and the other end of the bolt 131 is threadedly connected to the threaded hole 101 on the PM side of the pinion shaft 1. Since the relative position of the bolt 131 and the connecting member 12 remains unchanged, when the bolt 131 rotates, it will only drive the pinion shaft 1 to move, and move along a preset direction, which is the direction away from the PW side bearing assembly of the pinion shaft 1, so that the PW side of the pinion shaft 1 can be removed from the PW side bearing assembly, thereby realizing the separation of the pinion shaft 1 from the gear box housing 2.

[0050] The bolt 131 drives the pinion shaft 1 to move away from the PW side bearing assembly, which can overcome the problem that the PW side bearing assembly cannot be removed from the PW side, and the pinion shaft 1 can be pulled out from the PW side bearing assembly. The threaded section of the bolt 131 has a sufficient length to ensure the removal distance of the pinion shaft 1.

[0051] like Figure 3 As shown, the operation steps of the gearbox disassembly device are described in detail below:

[0052] 1. First, remove the small and medium shaft glands 10 and sealing caps 11 on the PW side.

[0053] 2. Remove the bearing seat 7, bearing cover 8 and sealing cover 9 on the PM side.

[0054] 3. The circular fixed chassis 121 in the connecting member 12 is fixedly connected to the PM side of the gear box housing 2 by using a plurality of bolts 125 .

[0055] 4. Put the bolt 131 into the second bolt hole 126 on the fixing plate 122 of the connecting member 12 , and the other end of the bolt 131 is fixedly connected to the threaded hole 101 at the center of the PM side surface of the pinion shaft 1 .

[0056] 5. Use the equipment to rotate the bolt 131. During the rotation of the bolt 131, the pinion shaft 1 is driven to move relative to the gearbox housing 2 along a preset direction, which is the direction away from the PW side bearing assembly of the pinion shaft 1. Finally, the PW side of the pinion shaft 1 is removed from the PW side bearing assembly, thereby separating the pinion shaft 1 from the gearbox housing 2.

[0057] 6. After the pinion shaft 1 is removed, install a guide column (not shown in the figure) on the bearing seat 5 on the PW side of the gear box body 2, and use the process bolts to remove the PW side bearing seat 5. When the PW side bearing seat 5 is axially displaced, the ball bearing 3 and the cylindrical bearing 4 are axially displaced together until they are removed.

[0058] 7. Complete the disassembly of the gearbox.

[0059] The decomposition device has the following advantages:

[0060] 1. This disassembly device is mainly used for disassembling the gearbox of rail transit vehicles. The pinion shaft 1 can only be taken out after the outer ring of the ball bearing 3 and the cylindrical bearing 4 on the PW side are removed. However, the space on both sides of the pinion shaft 1 is limited, there is no fixed gripping point for removal, and the existing removal device cannot be used for removal. This disassembly device uses a connector from the PM side to fix the connection with the gearbox housing, providing an effective support point for the removal of the pinion shaft, and removing the pinion shaft from the PM side.

[0061] 2. The disassembly device can provide an effective support point during the removal process of the pinion shaft, reduce the difficulty of operation, improve the working efficiency, ensure the disassembly quality of the gearbox and the removal quality of the pinion shaft, avoid scratches on the product after violent removal and make it unusable, reduce costs, and reduce the impact on the production cycle and cost of the current vehicle.

[0062] 3. The disassembly device has a simple structure and is reliable and stable to use. It can meet the maintenance requirements of the gearbox and ensure the reliability of the maintenance of the pinion shaft components of the rail vehicle gearbox.

[0063] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A gearbox disassembly device, characterized in that: include: A connecting piece, fixedly connected to the gear box body; A withdrawal piece is installed on the connecting piece and is movably connected to the first side surface of the gear shaft. The central axis of the withdrawal piece and the gear shaft coincide. During the movement of the withdrawal piece, the gear shaft is driven to move along a preset direction relative to the gear box body. The preset direction is the direction away from the bearing assembly on the second side of the gear shaft, so that the second side of the gear shaft can be withdrawn from the bearing assembly.

2. The gearbox disassembly device according to claim 1, characterized in that: When the withdrawing member moves, the relative position between the withdrawing member and the connecting member remains unchanged.

3. The gearbox disassembly device according to claim 1, characterized in that: The connecting member includes a fixed chassis, a fixed plate and two connecting beams. The fixed chassis is detachably connected to the side of the gear box body. The two connecting beams are installed on the fixed chassis. The fixed plate is installed between the two connecting beams. After installation, the fixed plate is placed on the outer side of the first side of the gear shaft, and the withdrawal member is installed on the fixed plate.

4. The gearbox disassembly device according to claim 3, characterized in that: The fixed plate is parallel to the fixed chassis, the fixed plate and two connecting beams form a door-shaped structure, and the withdrawal piece is installed at the center point of the fixed plate.

5. The gearbox disassembly device according to claim 3, characterized in that: The fixed chassis is a circular plate-shaped structure.

6. The gearbox disassembly device according to claim 3, characterized in that: The fixed chassis is provided with a plurality of first bolt holes, which are fixedly connected with the process holes on the side surface of the gear box housing by bolts.

7. The gearbox disassembly device according to claim 6, characterized in that: The plurality of first bolt holes are evenly and discontinuously arranged along the circumference of the fixed chassis.

8. The gearbox disassembly device according to claim 1, characterized in that: The connecting piece is a height-adjustable structure, and the height of the connecting piece is adjusted according to the height difference between the first side surface of the gear shaft and the side surface of the gear box body.

9. The gearbox disassembly device according to claim 1, characterized in that: The withdrawing piece is a bolt, and a second bolt hole is provided on the connecting piece. The withdrawing piece is inserted into the second bolt hole and extends in the direction of the gear shaft. The other end of the withdrawing piece is threadedly connected to the central threaded hole on the first side surface of the gear shaft. When the withdrawing piece rotates, it drives the gear shaft to move along a preset direction.

10. The gearbox disassembly device according to any one of claims 1 to 9, characterized in that: The first side is the PM side of the pinion shaft, the second side is the PW side of the pinion shaft, and the bearing assembly includes a ball bearing, a cylindrical bearing and a bearing seat installed on the PW side of the pinion shaft.

Images