Gear withdrawing device

Abstract

The utility model relates to a gear withdrawal device, which comprises a hydraulic oil input device, a hydraulic oil output device, a hydraulic oil output device and a hydraulic oil output device, wherein the hydraulic oil input device is used for injecting high-pressure oil into a matching surface between a gear shaft and a gear; one end of the withdrawal part abuts against the end face of the gear shaft, the other end of the withdrawal part is connected with the power mechanism, and the power mechanism applies axial force to the gear shaft through the withdrawal part; the withdrawal puller is fixedly connected with the gear and is fixedly connected with the withdrawal seat through a rigid connecting rod, and the power mechanism is fixedly mounted on the withdrawal seat; the connecting rod is sleeved with the power mechanism, the withdrawing seat and the withdrawing piece, the power mechanism, the withdrawing seat and the withdrawing piece are in sliding fit with the connecting rod, one end of the connecting rod is fixedly connected with the gear shaft, and the central axis of the connecting rod coincides with the central axis of the gear shaft. The shaft coupling pinion withdrawing device is simple in overall structure and convenient to operate, not only can guarantee that high-pressure oil is used for providing radial expansion force needed by the pinion, but also can assist in withdrawing by axial tension, can quickly and stably finish withdrawing operation of the shaft coupling pinion, and is high in operation efficiency and stable in operation quality.

Description

Technical Field

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

[0002] The coupling pinion and the motor (gearbox) small shaft are connected with a 1:50 taper interference fit. In order to ensure sufficient torque transmission, the interference is large, and the required pressure force is large when unloading. When unloading the coupling pinion, the traditional method is to inject high-pressure oil into the mating surface to produce radial expansion to complete the unloading. Occasionally, during the unloading process, hydraulic oil leaks from the large end of the mating surface during the expansion process, resulting in insufficient oil injection pressure. The radial expansion force cannot meet the unloading requirements, resulting in unloading failure, and auxiliary force is required to complete the unloading together.

[0003] In the unloading operation, if the unloading is not successful in one go, problems such as damage to the small shaft surface or scratches on the inner cavity of the small gear may occur, resulting in the scrapping of the material. The traditional unloading method has problems such as poor unloading quality and low unloading efficiency. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a gear unloading device which can quickly and stably complete the gear unloading operation and ensure the unloading quality.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A gear unloading device, comprising:

[0007] A hydraulic oil input device, used to inject high-pressure oil into the mating surface between the gear shaft and the gear;

[0008] A withdrawal piece, one end of which abuts against the end surface of the gear shaft, and the other end is connected to the power mechanism, and the power mechanism applies an axial force to the gear shaft through the withdrawal piece;

[0009] The withdrawal puller is fixedly connected to the gear and is fixedly connected to the withdrawal seat through a rigid connecting rod, and the power mechanism is fixedly installed on the withdrawal seat;

[0010] The connecting rod, the power mechanism, the withdrawal seat and the withdrawal piece are sleeved on the connecting rod and slidably matched with the connecting rod. One end of the connecting rod is fixedly connected to the gear shaft, and the central axis of the connecting rod coincides with the central axis of the gear shaft.

[0011] Furthermore, the withdrawing piece is cylindrical and has a central through hole, the connecting rod passes through the central through hole, and one end face of the withdrawing piece is in contact with the end face of the gear shaft.

[0012] Furthermore, the withdrawing member is provided with a U-shaped groove, the U-shaped groove is open toward one end of the gear shaft, and the oil filling pipe of the hydraulic oil input device is placed in the U-shaped groove.

[0013] Furthermore, the end of the withdrawing piece is in a stepped structure, with a small diameter section protruding toward the gear shaft, the diameter of the small diameter section is smaller than the diameter of the inner ring of the gear and the end face is in contact with the end face of the gear shaft.

[0014] Furthermore, a withdrawal gap is provided between the end surface of the large diameter section of the withdrawal piece and the end surface of the gear in the initial position.

[0015] Furthermore, the withdrawal part consists of a separate withdrawal pad and a withdrawal gasket. Both the withdrawal pad and the withdrawal gasket are provided with a central through hole for passing the connecting rod, and are mounted side by side on the connecting rod. The withdrawal pad is cylindrical, and the withdrawal gasket is a stepped structure. The end face of the small diameter section is in contact with the end face of the gear shaft, and the end face of the large diameter section is in contact with the withdrawal pad. The power mechanism transmits the axial force to the gear shaft through the withdrawal pad and the withdrawal gasket in turn.

[0016] Furthermore, the removal puller is composed of two semicircular first pullers and a second puller, and the first puller and the second puller are fixedly connected together by bolts on both sides and fixed on the outer peripheral surface of the gear.

[0017] Furthermore, the connecting rod is a screw, one end of which is threadedly connected to the central threaded hole of the end face of the gear shaft, and the other end passes through the power mechanism and is locked and fixed by a stop washer and a front end nut.

[0018] Furthermore, the withdrawal seat is a flange, the rigid connecting rod is a double-headed screw, a plurality of first threaded holes are arranged on the flange, a plurality of second threaded holes are correspondingly arranged on the withdrawal puller, and the double-headed screw is threadedly connected to the first threaded holes and the second threaded holes respectively.

[0019] Furthermore, the power mechanism is a hydraulic jack, which has a central through hole, through which a connecting rod passes, and the hydraulic jack is fixedly connected to a withdrawal seat via threads, and a piston of the hydraulic jack is fixedly connected to a withdrawal piece.

[0020] In summary, the coupling gear unloading device provided by the utility model has the following advantages compared with the prior art:

[0021] (1) The overall structure of the device is simple and easy to operate. It can not only ensure that the radial expansion force required by the pinion is provided by high-pressure oil, but also assist in the removal by axial tension. Compared with the traditional removal method, the removal operation of the coupling pinion can be completed quickly and stably, with high operation efficiency and stable operation quality.

[0022] (2) The overall structure of the device is reliable and stable, which can improve the success rate of one-time unloading and reduce the loss and impact on product quality to zero, solving the problems of difficult unloading, laborious and material damage in traditional unloading methods.

[0023] (3) The device is suitable for various vehicle models that use couplings. It has strong versatility and a wide range of applications, which is conducive to reducing the cost of production tooling.

[0024] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] In the attached picture:

[0027] Figure 1 It is a structural schematic diagram of the unloading device of the utility model;

[0028] Figure 2 It is a structural sectional view of the unloading device of the utility model;

[0029] Figure 3 It is a structural exploded diagram of the unloading device of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the utility model of the withdrawal gasket;

[0031] Figure 5 This is a structural cross-sectional view of the utility model's withdrawal gasket;

[0032] Figure 6 It is a structural schematic diagram of the utility model of the unloading cushion block;

[0033] Figure 7 yes Figure 6 Side view of .

[0034] In the figure:

[0035] Gear 1, gear shaft 2;

[0036] Hydraulic oil input device 3, oil filling pipe 31;

[0037] Withdrawal part 4, withdrawal pad 41, central through hole 411, U-shaped groove 412, withdrawal gasket 42, central through hole 421, small diameter section 422, large diameter section 423, U-shaped groove 424;

[0038] Removal puller 5, first puller 51, second puller 52, bolt 53, retaining ring 54, groove 55, second threaded hole 56;

[0039] Withdrawal seat 6, flange 61, first threaded hole 62, nut 63;

[0040] Power mechanism 7, hydraulic jack 71, oil inlet 72;

[0041] Connecting rod 8, lead screw 81, rigid connecting rod 9, anti-rotation washer 10, front end nut 11.

[0042] 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

[0043] 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.

[0044] 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.

[0045] 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.

[0046] like Figures 1 to 3 As shown, the utility model provides a gear unloading device, which is mainly used to unload and separate the pinion 1 on the coupling from the gear shaft 2.

[0047] The gear unloading device provided by the utility model comprises a hydraulic oil input device 3, an unloading member 4, an unloading puller 5, an unloading seat 6, a power mechanism 7 and a connecting rod 8.

[0048] Among them, the hydraulic oil input device 3 is used to inject high-pressure oil into the mating surface between the gear shaft 2 and the gear 1, providing the radial expansion force required for the gear 1 to be withdrawn. One end of the withdrawal member 4 abuts against the end face of the gear shaft 2, and the other end is connected to the power mechanism 7. The power mechanism 7 applies an axial force to the gear shaft 2 through the withdrawal member 4. The withdrawal puller 5 is fixedly connected to the gear 1, and the withdrawal puller 5 is rigidly fixedly connected to the withdrawal seat 6 through a plurality of rigid connecting rods 9 to form an overall rigid structure. The power mechanism 7 is fixedly mounted on the withdrawal seat 6. When the power mechanism 7 applies an axial force to the gear shaft 2 (to the right in the figure), the rigid structure formed by the withdrawal puller 5, the rigid connecting rod 9 and the withdrawal seat 6 applies a reverse axial pulling force to the gear 1, so that the gear 1 is withdrawn from the gear shaft 2. The connecting rod 8 runs through the entire device, and the power mechanism 7, the withdrawal member 4 and the withdrawal seat 6 are all mounted on the connecting rod 8. The power mechanism 7, the withdrawal member 4 and the withdrawal seat 6 are slidably matched with the connecting rod 8 and can slide left and right relative to the connecting rod 8. One end of the connecting rod 8 is fixedly connected to the end face of the gear shaft 2, and the central axis of the connecting rod 8 coincides with the central axis of the gear shaft.

[0049] With the above structure, when the coupling pinion is unloaded, the unloading puller 5 is fixed and locked with the gear 1, and the hydraulic oil input device 3 continuously injects high-pressure oil into the matching surface of the gear shaft 2 and the coupling pinion 1 to provide the required radial expansion force for the gear 1. The device is started to assist in unloading, and the power mechanism 7 applies axial thrust to the gear shaft 2 through the unloading member 4. Since the position of the gear shaft 2 does not move, the rigid structure formed by the unloading puller 5, the rigid connecting rod 9 and the unloading seat 6 generates a reverse axial pulling force on the gear 1, so that the gear 1 is unloaded from the gear shaft 2. The overall structure of the device is simple and easy to operate. It can quickly and stably complete the unloading operation of the coupling pinion and improve the working efficiency.

[0050] By adopting the above structure, a stable structure is formed by utilizing the rigid connection structure between the unloading puller 5, the rigid connecting rod 9 and the unloading seat 6, thereby improving the stability of the entire device, ensuring that the gear 1 and the gear shaft 2 will not be damaged during the unloading process, ensuring the unloading quality, and ensuring the one-time unloading success rate, thereby solving the problems of unloading difficulties and material damage in traditional unloading methods.

[0051] By adopting the above structure, the power mechanism 7, the withdrawal member 4 and the withdrawal seat 6 are all mounted on the connecting rod 8, and the central axis of the connecting rod 8 coincides with the central axis of the gear shaft, thereby ensuring that the central axes of the power mechanism 7, the withdrawal member 4 and the withdrawal seat 6 coincide with the central axis of the gear shaft, so that the force applied to the gear shaft 2 and the gear 1 can be balanced, which is beneficial to ensuring the withdrawal quality.

[0052] In this embodiment, the hydraulic oil input device 3 includes an oil injection pump (not shown in the figure), one end of which is connected to the oil tank, and the other end is connected to the oil injection pipe 31, and the high-pressure oil is injected into the matching surface between the gear shaft 2 and the gear 1 through the oil injection pipe 31. The matching surface between the gear shaft 2 and the gear 1 is expanded by the high pressure of the oil, and a thin oil film is formed between the matching surfaces, so that when the gear 1 is removed, the friction state between the gear 1 and the gear shaft 2 is converted from dry friction to fluid friction, thereby reducing the clamping force between the two and reducing the pressing force required for removal.

[0053] In this embodiment, the withdrawal puller 5 matches the outer circumferential shape of the gear 1, and is in an annular shape as a whole. It is preferably a split structure, consisting of two semicircular first pullers 51 and second pullers 52 fixedly connected by bolts 53 on both sides. The first puller 51 and the second puller 52 are fastened together and grasped on the outer circumferential surface of the gear 1, and the gear 1 is firmly fixed inside the withdrawal puller 5. This not only facilitates the disassembly and assembly between the withdrawal puller 5 and the gear 1, but also ensures that the withdrawal puller 5 will not fall off the gear 1 during the withdrawal process, thereby affecting the work efficiency and work quality.

[0054] The outer end faces of the first puller 51 and the second puller 52 have retaining rings 54 extending toward the center, and the retaining rings 54 and the end faces of the gear 1 form a contact surface for applying force. When the unloading puller 5 moves toward the left direction in the figure (i.e., toward the direction of the power mechanism 7) driven by the power mechanism 7, the retaining rings 54 are used to apply axial tension to the gear 1, pulling the gear 1 to move toward the left together and unloading from the gear shaft 2. In this way, it can ensure that the force on the gear 1 is balanced, improve the success rate of unloading in one time, and will not damage the gear 1 and the gear shaft 2, thereby improving the unloading quality.

[0055] The present embodiment is further preferred that the inner ring surface of the withdrawal puller 5 has a groove 55, and the groove 55 is specifically arranged on the retaining ring 54, and is arranged in a ring shape along the retaining ring 54, and cooperates with the structure on the end face of the gear 1. This can ensure that the gear 1 can be firmly fixed in the withdrawal puller 5 after installation and will not fall out during the withdrawal process, thereby ensuring the withdrawal efficiency and withdrawal quality.

[0056] In this embodiment, the withdrawal seat 6 preferably adopts a flange 61, the center hole of the flange 51 has an internal thread, and the center hole is used to fix the power mechanism 7. A plurality of first threaded holes 62 are evenly arranged on the circumference of the flange 61 for fixing and connecting the rigid connecting rod 9.

[0057] In this embodiment, the rigid connecting rod 9 adopts a double-headed screw, and a plurality of second threaded holes 56 are evenly arranged along the circumference on the withdrawal puller 5, and the first threaded hole 62 and the second threaded hole 56 are arranged one by one. One end of the rigid connecting rod 9 is fixedly connected to the first threaded hole 62 on the flange 61, and the other end of the rigid connecting rod 9 is fixedly connected to the second threaded hole 56 on the withdrawal puller 5. After the connection, the nut 63 is used to lock and fix one end of the flange 61, and the distance between the withdrawal puller 5 and the withdrawal seat 6 remains unchanged after the connection.

[0058] In this embodiment, preferably, four rigid connecting rods 9 are provided between the withdrawal puller 5 and the withdrawal seat 6 to form balanced pulling force at four corners, thereby ensuring that no deflection occurs during the pulling process, and the gear 1 and the gear shaft 2 are not damaged, thereby ensuring the withdrawal quality.

[0059] In this embodiment, the power mechanism 7 includes a hydraulic jack 71, one end of which is fixedly connected to the center hole of the flange 61 by a thread, and the relative position between the hydraulic jack 71 and the flange 61 remains unchanged. The hydraulic jack 71 has a central through hole, and the connecting rod 8 passes through the central through hole, and the hydraulic jack 71 and the connecting rod 8 are slidably matched.

[0060] The oil inlet 72 of the hydraulic jack 71 is connected to the oil injection pump through an oil inlet pipeline (not shown in the figure), and the other end of the oil injection pump is connected to the oil tank. One oil tank and one oil injection pump can simultaneously provide high-pressure oil to the hydraulic jack 71 and the mating surfaces of the gear 1 and the gear shaft 2. The hydraulic jack 71 is connected to the hydraulic controller, and the operator controls the action of the hydraulic jack 71 through the hydraulic controller.

[0061] The piston of the hydraulic jack 71 extends toward the direction of the gear 1, and the piston is fixedly connected to the unloading member 4. The piston and the unloading member 4 can be connected by threads or keys. When the hydraulic jack 71 is actuated, the piston extends forward (i.e., toward the direction of the gear shaft 2), and the piston transmits the axial thrust to the gear shaft 2 through the unloading member 4.

[0062] like Figures 1 to 3 As shown, in this embodiment, the withdrawal piece 4 is cylindrical and has a central through hole. The connecting rod 8 passes through its central through hole. The withdrawal piece 4 and the connecting rod 8 are slidably matched. The withdrawal piece 4 can slide left and right relative to the connecting rod 8. One end face of the withdrawal piece 4 is in contact with the end face of the gear shaft 2.

[0063] In this embodiment, preferably, the withdrawal part 4 is composed of two parts, including a withdrawal pad 41 and a withdrawal gasket 42, which are mounted side by side on the connecting rod 8. In this way, it is beneficial to use the pressed parts in the gear pressing device as the withdrawal pad 41, without the need for additional processing, which is beneficial to reducing the cost of the device.

[0064] like Figure 6 and Figure 7 As shown, the withdrawal pad 41 is cylindrical and has a central through hole 411, through which the connecting rod 8 passes, and the withdrawal pad 4 is slidably matched with the connecting rod 8, and the withdrawal pad 4 can slide left and right relative to the connecting rod 8. The piston of the hydraulic jack 71 is connected to the left end of the withdrawal pad 41, and the right end face of the withdrawal pad 41 is in contact with the withdrawal gasket 42.

[0065] A U-shaped groove 412 is provided on the withdrawal pad 41. The U-shaped groove 412 is open at one end toward the gear shaft 2 and is closed at the opposite end. The oil filling pipe 31 in the hydraulic oil input device 3 is placed in the U-shaped groove 412 to facilitate the injection of high-pressure oil into the mating surfaces of the gear 1 and the gear shaft 2.

[0066] like Figure 4 and Figure 5 As shown, the withdrawal gasket 42 is a disc-shaped structure as a whole, having a central through hole 421 , through which the connecting rod 8 passes. The withdrawal gasket 42 is slidably matched with the connecting rod 8 , and the withdrawal gasket 42 can slide left and right relative to the connecting rod 8 .

[0067] Since the gear shaft 2 and the gear 1 are tapered, a large axial impact will be generated when the withdrawal pressure is reached and the gear 1 is automatically disengaged. Therefore, in this embodiment, it is preferred that the withdrawal gasket 42 adopts a stepped structure, including a small diameter section 422 and a large diameter section 423, wherein the diameter of the small diameter section 422 is smaller than the inner ring diameter of the gear 1, and the end face of the small diameter section 422 fits with the end face of the gear shaft 2, and the diameter of the large diameter section 423 is larger than the inner ring diameter of the gear 1, and the end face of the large diameter section 423 fits with the end face of the withdrawal pad 41, and the power mechanism 7 transmits the axial force to the gear shaft 2 through the withdrawal pad 41 and the withdrawal gasket 42 in turn.

[0068] Utilizing the end face of the small diameter section 422 to fit with the end face of the gear shaft 2 not only helps to increase the fitting area and stably transmit the axial force to the gear shaft 2 without damaging the gear shaft 2, but also the small diameter section 422 of the withdrawal gasket 42 also serves as a limit for the gear 2, ensuring that after the withdrawal is completed, the gear 2 can be supported on the small diameter section 422 of the withdrawal gasket 42 to prevent the gear 1 from falling unprotected after withdrawal, protect the gear 1 from damage, ensure process reliability, and improve operation safety.

[0069] In this embodiment, there is a withdrawal gap between the end face of the large diameter section 423 of the withdrawal gasket 42 and the end face of the gear 1 in the initial position, that is, in the initial position, there is a certain distance between the end face of the large diameter section 423 of the withdrawal gasket 42 and the end face of the gear 1, and the distance is used to absorb the stroke required for withdrawal. The stroke is the shortest distance required for withdrawal. Only when the gear 1 moves to the left by this distance can the withdrawal between the gear 1 and the gear shaft 2 be realized, and at this time, the gear 1 can be easily removed from the gear shaft 2.

[0070] A U-shaped groove 424 is also formed on the withdrawal gasket 42, and the oil filling pipe 31 in the hydraulic oil input device 3 is also placed in the U-shaped groove 424, so as to facilitate the injection of high-pressure oil into the matching surface.

[0071] With respect to the withdrawal part 4, this embodiment also provides another implementation mode, in which the withdrawal part 4 adopts an integrated structure, that is, the above-mentioned withdrawal pad block 41 and withdrawal gasket 42 are an integrated structure, and the withdrawal part 4 is a cylinder as a whole, which is mounted on the connecting rod 8, and a stepped structure is arranged at one end of the cylinder, and the end face of the small diameter section thereof is fitted with the end face of the gear shaft 2 to transmit the axial force.

[0072] In this embodiment, the connecting rod 8 preferably adopts a screw 81, and the hydraulic jack 71, the flange 61, the withdrawal pad 41, and the withdrawal gasket 42 are all mounted on the screw 81. One end of the screw 81 is fixedly connected to the threaded hole in the center of the end face of the gear shaft 2 by a thread, and the other end of the screw 81 passes through the hydraulic jack 71 and is locked and fixed by the anti-rotation gasket 10 and the front end nut 11.

[0073] The following describes in detail the steps for using the unloading device:

[0074] 1. Use bolts 53 to assemble the first puller 51 and the second puller 52, and fasten them to the gear 1, and hold the coupling pinion therein.

[0075] 2. Assemble the lead screw 81, the withdrawal gasket 42, the withdrawal pad 41, the four rigid connecting rods 9 and the flange 61 in sequence, and fix one end of the lead screw 81 to the threaded hole in the center of the end face of the gear shaft 2 to ensure that balanced tension can be formed at the four corners.

[0076] 3. The hydraulic jack 71 is mounted on the lead screw 81 and fixedly connected to the center hole of the flange 61 through threads, and the piston of the hydraulic jack 7 is fixedly connected to the withdrawal pad 41.

[0077] 4. Start the oil injection pump and inject high-pressure oil into the mating surface between the gear shaft 2 and the coupling pinion 1.

[0078] 5. Inject high-pressure oil into the hydraulic jack 71. The piston of the hydraulic jack 71 applies an axial thrust to the gear shaft 2 through the withdrawal pad 41 and the withdrawal gasket 42. At this time, the withdrawal puller 5 will cause the gear 1 locked with it to move axially relative to the gear shaft 2 through the reaction pulling force. The movement direction of the gear 1 is opposite to the direction in which the hydraulic jack 71 applies force to the gear shaft 2, and the gear 1 can be withdrawn from the gear shaft 2. In this process, the withdrawn gear 1 is supported on the small diameter section 422 of the withdrawal gasket 42, which plays a limiting role and prevents the gear 1 from falling.

[0079] The unloading device has the following advantages:

[0080] 1. The overall structure of the device is simple and easy to operate. It can not only ensure that the high-pressure oil provides radial expansion pressure for the pinion, but also assist in unloading with axial tension. Compared with the traditional unloading method, it can quickly and stably complete the unloading operation of the coupling pinion, with high operating efficiency and stable operating quality.

[0081] 2. The overall structure of the device is reliable and stable, which can improve the success rate of one-time unloading, reduce the loss and impact on product quality to zero, and solve the problems of difficult unloading, laborious and material damage in traditional unloading methods.

[0082] 3. In this device, the central axes of the power mechanism, the unloading member and the unloading seat can be ensured to coincide with the central axis of the gear shaft, so that the force applied to the gear shaft and the gear can be balanced, which is beneficial to ensure the unloading quality.

[0083] 4. The unloading part in the device can not only transmit the axial force, but also prevent the small gear from falling off after unloading, so as to ensure that the gear is not damaged, ensure the process reliability and improve the safety of operation.

[0084] 5. The device is suitable for various types of vehicles using couplings. It has strong versatility and a wide range of applications, which is beneficial to reducing the cost of production tooling.

[0085] 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 gear unloading device, characterized in that: include: A hydraulic oil input device, used to inject high-pressure oil into the mating surface between the gear shaft and the gear; A withdrawal piece, one end of which abuts against the end surface of the gear shaft, and the other end is connected to the power mechanism, and the power mechanism applies an axial force to the gear shaft through the withdrawal piece; The withdrawal puller is fixedly connected to the gear and is fixedly connected to the withdrawal seat through a rigid connecting rod, and the power mechanism is fixedly installed on the withdrawal seat; The connecting rod, the power mechanism, the withdrawal seat and the withdrawal piece are sleeved on the connecting rod and slidably matched with the connecting rod. One end of the connecting rod is fixedly connected to the gear shaft, and the central axis of the connecting rod coincides with the central axis of the gear shaft.

2. The gear unloading device according to claim 1, characterized in that: The withdrawing piece is cylindrical and has a central through hole. The connecting rod passes through the central through hole. One end face of the withdrawing piece is in contact with the end face of the gear shaft.

3. The gear unloading device according to claim 2, characterized in that: The withdrawing piece is provided with a U-shaped groove, the U-shaped groove is open toward one end of the gear shaft, and the oil filling pipe of the hydraulic oil input device is placed in the U-shaped groove.

4. The gear unloading device according to claim 2, characterized in that: The end of the withdrawing piece is in a stepped structure, and has a small diameter section protruding toward the gear shaft. The diameter of the small diameter section is smaller than the diameter of the inner ring of the gear, and the end face is in contact with the end face of the gear shaft.

5. The gear unloading device according to claim 4, characterized in that: There is a withdrawal clearance between the end surface of the large diameter section of the withdrawal piece and the end surface of the gear in the initial position.

6. The gear unloading device according to claim 4, characterized in that: The withdrawal part consists of a separate withdrawal pad and a withdrawal gasket. Both the withdrawal pad and the withdrawal gasket are provided with a central through hole for passing the connecting rod, and are mounted side by side on the connecting rod. The withdrawal pad is cylindrical, and the withdrawal gasket is a stepped structure. The end face of the small diameter section is in contact with the end face of the gear shaft, and the end face of the large diameter section is in contact with the withdrawal pad. The power mechanism transmits axial force to the gear shaft through the withdrawal pad and the withdrawal gasket in turn.

7. The gear unloading device according to claim 1, characterized in that: The unloading puller is composed of two semicircular first pullers and a second puller. The first puller and the second puller are fixedly connected together by bolts on both sides and fixed on the outer peripheral surface of the gear.

8. The gear unloading device according to claim 1, characterized in that: The connecting rod is a lead screw, one end of which is threadedly connected to the central threaded hole on the end face of the gear shaft, and the other end passes through the power mechanism and is locked and fixed by a stop washer and a front end nut.

9. The gear unloading device according to claim 1, characterized in that: The withdrawal seat is a flange, the rigid connecting rod is a double-headed screw, a plurality of first threaded holes are arranged on the flange, a plurality of second threaded holes are correspondingly arranged on the withdrawal puller, and the double-headed screw is threadedly connected with the first threaded holes and the second threaded holes respectively.

10. The gear unloading device according to any one of claims 1 to 9, characterized in that: The power mechanism is a hydraulic jack, which has a central through hole, through which a connecting rod passes, and the hydraulic jack is fixedly connected to a withdrawal seat via threads, and a piston of the hydraulic jack is fixedly connected to a withdrawal piece.

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