Gearbox bearing outer ring withdrawing device

Abstract

The utility model discloses a gear box bearing outer ring retreats and draws device, including frock main part, rectangle nut, rotation buckle, valve flap, screw rod, bottom plate and two movable dog, the vertical connection hole of frock main part center is equipped with, and rectangle nut is embedded in the connection hole and length is greater than the width of connection hole, the lower end of screw rod passes through rotation buckle, rectangle nut and valve flap upper end rotatable fixed connection in proper order, and screw rod is connected with rectangle nut screw thread, and rotation buckle is connected with frock main part and restricts rectangle nut to move upward, two movable dogs are located respectively in the both sides of rectangle nut in connection hole, and two movable dogs all are in the form of and open opposite, and frock main part and bearing outer ring can be clamped into the opening of two movable dogs, and bottom plate is connected with frock main part and is located below rectangle nut, and bottom plate can be crossed with valve flap and be used for restricting rectangle nut to move downward. The screwing screw rod can pull out gear box bearing outer ring successfully upward, and will not cause bearing damage.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing outer ring disassembly, specifically relating to a gearbox bearing outer ring unloading device. Background Technology

[0002] Currently, the gearbox is a crucial component of the subway vehicle's running gear, integrated with the train wheelset. The traction motor generates transmission torque, which is transmitted to the pinion gear in the gearbox via a spiral gear coupling. The pinion gear then drives the wheelset through meshing with the large gear. The gearbox is a critical component for the safe operation of subway vehicles; therefore, its inspection and maintenance are extremely important and require utmost care. For example, the A2 type gearbox of Guangzhou Metro Line 2 is a single-stage transmission gearbox. The inner and outer rings of the bearing on its small shaft are separable. The outer ring is integrated with the cage and rollers. During disassembly, the outer ring must be removed along with the cage and rollers. The distance between the end face of the outer ring and the inner boss surface of the gearbox bearing support body is only 3mm, but the radial distance is 20mm. The outer ring is fitted into the recess of the gearbox bearing support body, resulting in a transition fit. Using a standard puller, the clamping jaws cannot be inserted into the end face of the outer ring for tightening. Special machining to lengthen the puller's jaws would compromise its strength. The tip of a regular puller can cause scratches and wear on the mating surfaces of the gearbox during the pulling process of the bearing outer ring. Regular pullers cannot replicate the bearing inner ring fixing mechanism where the bearing rollers, cage, and outer ring are integrated. During the pulling process, the rollers are prone to fall out, causing damage to the bearing.

[0003] Therefore, a new technology is needed to solve the problem of the difficulty in disassembling the outer ring of gearbox bearings in existing technologies. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides a gearbox bearing outer ring unloading device that can serve as an inner ring to fix the bearing rollers, cage, and outer ring of the bearing as a whole. During the pulling process, the rollers will not fall out and cause bearing damage, thus facilitating the disassembly of the gearbox bearing outer ring.

[0005] The present invention adopts the following technical solution:

[0006] A gearbox bearing outer ring unloading device includes a tooling body, a rectangular nut, a rotating buckle, a valve disc, a lead screw, a base plate, and two movable jaws;

[0007] The tooling body has a vertically oriented connecting hole at its center. The width of the horizontal cross-section of the connecting hole is smaller than the length of the rectangular nut. The rectangular nut can be inserted into the connecting hole and detachably fixedly connected to the tooling body. The lower end of the lead screw passes vertically through the rotating buckle and is threadedly connected to the rectangular nut. The valve disc is located below the rectangular nut, and the bottom of the lead screw is rotatably fixedly connected to the upper end of the valve disc. The rotating buckle can be connected to the tooling body and is used to restrict the upward movement of the rectangular nut.

[0008] The two movable claws are located on both sides of the rectangular nut in the length direction inside the connecting hole. Both movable claws are C-shaped and have opposite openings. The tooling body and the outer ring of the bearing can be inserted into the openings of the two movable claws. The bottom end of each movable claw is provided with a lower claw part that connects to the lower end face of the outer ring of the bearing.

[0009] The base plate is located below the rectangular nut and connected to the main body of the tooling. The base plate allows the valve disc to pass through and restricts the downward movement of the rectangular nut.

[0010] As a further improvement to the technical solution of this utility model, the upper end of the valve disc is provided with a groove, the lower end of the screw can be inserted into the groove, a plurality of balls are provided in the groove, and the plurality of balls are located between the screw and the inner wall of the groove, and the screw and the valve disc can rotate relative to each other.

[0011] As a further improvement to the technical solution of this utility model, arc-shaped grooves are horizontally provided on the opposite side walls of the connecting hole, and two protrusions are provided at intervals on the outer side of the rotating buckle, with the two protrusions corresponding to and fitting the two arc-shaped grooves respectively.

[0012] As a further improvement to the technical solution of this utility model, the rectangular nut has a threaded hole at its center that is threaded to the lead screw, and the upper end face of the rectangular nut has an annular groove, the minimum diameter of which is greater than the diameter of the threaded hole; the lower end face of the rotating buckle has an annular protrusion that is adapted to the annular groove, and the annular protrusion can be embedded in the annular groove.

[0013] As a further improvement to the technical solution of this utility model, the lower part of the rectangular nut is provided with a through hole that is coaxial with and interconnected with the threaded hole. The diameter of the through hole is larger than the diameter of the threaded hole, and the diameter of the valve disc is larger than the diameter of the threaded hole. The valve disc can be inserted into the through hole.

[0014] As a further improvement to the technical solution of this utility model, the movable claw includes a first body, a second body, and a third body connected in a C-shape from top to bottom, the third body forming the lower claw portion; the width of the second body is adapted to the width of the cross-section of the connecting hole, the length of the horizontal cross-section of the connecting hole is not less than the horizontal length of the first body and / or the third body, and the vertical height of the tooling body is not greater than the distance between the second bodies.

[0015] As a further improvement to the technical solution of this utility model, the tooling body includes an end plate and a cylinder that are fixedly connected to each other from bottom to top. The end plate is annular and its inner side is fixedly connected to the upper end of the cylinder. The first body is located above the end plate and is detachably fixedly connected to the end plate. The lower end of the cylinder is provided with two notches at intervals. Each notch allows the corresponding third body to pass through horizontally. The vertical depth of the notch is adapted to the vertical thickness of the third body.

[0016] Two positioning blocks are provided at intervals on the upper surface of the end plate. The two positioning blocks are located on both sides of the connecting hole, and the two positioning blocks correspond to the two arc-shaped grooves in the vertical direction.

[0017] As a further improvement to the technical solution of this utility model, two ball screws are installed opposite each other on the top of the tooling body, and the outer side of the rotating buckle is provided with a first positioning groove that matches the two ball screws, and the inner wall of each first positioning groove is arc-shaped.

[0018] As a further improvement to the technical solution of this utility model, the bottom surface of the third main body is flush with the bottom surface of the tooling main body, the bottom plate is located below the two third main bodies, and the upper end of the bottom plate is detachably fixed to the bottom end of the cylinder; the bottom plate is annular, and the center of the bottom plate can be used for the valve disc to pass through.

[0019] As a further improvement to the technical solution of this utility model, it also includes a handle, which is horizontally arranged and detachably fixedly connected to the upper end of the lead screw.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] The gearbox bearing outer ring unloading device using this solution features two movable jaws that fit tightly against the integrated structure formed by the bearing rollers, cage, and outer ring. The rectangular nut, movable jaws, and fixture body are connected to the outer ring as a single unit. Rotating the lead screw allows it to move downwards until the lower end face of the valve disc fits tightly against the mating surface of the gearbox bearing support. Continuing to rotate the transmission rod prevents further downward movement of the lead screw. The rectangular nut, two movable jaws, fixture body, and outer ring then move upwards relative to the lead screw, allowing the outer ring to be slowly pulled out. This design ensures the bearing inner ring is integrated with the bearing rollers, cage, and outer ring, preventing rollers from falling out and causing bearing damage during the pull-out process. It facilitates the disassembly of the gearbox bearing outer ring. The movable jaws can accommodate extremely specific dimensions of the gearbox bearing outer ring, such as when the bearing rollers, cage, and outer ring are integrated, allowing for disassembly without damaging the bearing structure. Attached Figure Description

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model and the connection structure of the gearbox bearing and its support.

[0024] Figure 2 This is a perspective view of the structural portion of the two unconnected movable claws of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure of this utility model and the connection structure of the gearbox bearing;

[0026] Figure 4 This is a schematic diagram of the structure of the gearbox bearing support;

[0027] Figure 5 This is an isometric view of the overall structure of this utility model and the connection structure of the gearbox bearing at one angle.

[0028] Figure 6 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 7 This is an axonometric view of the overall structure of this utility model from one angle;

[0030] Figure 8 This is a cross-sectional view of the overall structure of this utility model;

[0031] Figure 9 This is a schematic diagram of the lead screw structure;

[0032] Figure 10 This is the main view of the tooling body;

[0033] Figure 11 This is a side view of the main body of the tooling;

[0034] Figure 12 This is a top view of the main body of the tooling;

[0035] Figure 13 This is the front view of the rotating buckle;

[0036] Figure 14 This is a side view of the rotating buckle;

[0037] Figure 15 This is a top view of the rotating buckle;

[0038] Figure 16 This is the front view of the two movable claws;

[0039] Figure 17 This is a side view of the two movable jaws;

[0040] Figure 18 This is a top view of the two movable jaws;

[0041] Figure 19 This is the front view of a rectangular nut;

[0042] Figure 20 This is a side view of a rectangular nut;

[0043] Figure 21 This is a top view of a rectangular nut;

[0044] Figure 22 This is a schematic diagram of the valve disc structure;

[0045] Figure 23 This is the front view of the base plate;

[0046] Figure 24 This is a side view of the base plate;

[0047] Figure 25 This is the main view of the handle;

[0048] Figure 26 This is a side view of the handle;

[0049] Figure 27 This is a schematic diagram of the structure when viewed from one end of the transmission rod.

[0050] Figure label:

[0051] 1-Transmission rod; 11-Spherical limiting block;

[0052] 2-Lead screw; 21-Through hole; 22-Connecting post; 23-First annular groove;

[0053] 3-Rotating buckle; 31-First center hole; 32-Protrusion; 33-Annular protrusion; 34-Knob part; 35-First positioning groove;

[0054] 4-Rectangular nut; 41-Threaded hole; 42-Annular groove; 43-Through hole; 44-Second positioning groove;

[0055] 5-Valve disc; 51-Sinking groove; 52-Second annular groove; 53-Ball bearing;

[0056] 6-Modible claw; 61-First main body; 62-Second main body; 63-Third main body; 64-Arched concave part;

[0057] 7-Main body of tooling; 71-Connecting hole; 72-Arc groove; 73-End plate; 74-Cylinder; 741-Notch; 75-Positioning block; 751-Threaded mounting hole;

[0058] 8-Base plate; 81-Second center hole;

[0059] 9-Handle; 91-Connecting part;

[0060] 10-Gearbox bearing; 101-Bearing roller; 102-Cage; 103-Bearing outer ring; 104-Gearbox bearing support. Detailed Implementation

[0061] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0062] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0063] Reference Figures 1 to 27A gearbox bearing outer ring unloading device includes a tooling body 7, a rotating buckle 3, a rectangular nut 4, a valve disc 5, a lead screw 2, a base plate 8, and two movable jaws 6. The rotating buckle 3 is located above the rectangular nut 4, and the lead screw 2 can pass through the rotating buckle 3, allowing the lead screw 2 to rotate within the rotating buckle 3. The base plate 8 is located below the rectangular nut 4 and connected to the tooling body 7. The base plate 8 allows the valve disc to pass through and restricts the downward movement of the rectangular nut 4.

[0064] The tooling body 7 has a vertically oriented connecting hole 71 at its center. Both the connecting hole 71 and the rectangular nut 4 have rectangular horizontal cross-sections. The width of the connecting hole 71 matches the width of the rectangular nut 4's horizontal cross-section, which is less than the length of the rectangular nut. The rectangular nut 4 can be inserted into the connecting hole 71 and detachably fixedly connected to the tooling body 7. The lower end of the lead screw 2 vertically passes through the rectangular nut 4 and is threadedly connected to it. The valve disc 5 is located below the rectangular nut 4, and the bottom of the lead screw 2 is rotatably fixedly connected to the upper end of the valve disc 5. The rotating buckle 3 can be connected to the tooling body 7 and is used to restrict the upward movement of the rectangular nut 4.

[0065] Both movable jaws 6 are located within the connecting hole 71, and are respectively located on both sides of the rectangular nut 4 along its length. That is, the rectangular nut 4 is located between the two movable jaws 6, and the two movable jaws 6 can abut against the sides of the rectangular nut 4. Both movable jaws 6 are C-shaped with opposite openings. The tooling body 7 and the bearing outer ring 103 can be inserted into the openings of the two movable jaws 6. The bottom end of each movable jaw 6 is provided with a lower jaw portion that abuts against the lower end face of the integral structure formed by the bearing roller 101, the cage, and the bearing outer ring 103. The lower jaw portion is used to hold the integral structure formed by the bearing roller 101, the cage, and the bearing outer ring 103. The upper surface of the two lower jaw portions matches the shape and size of the contact portion with the bottom surface of the bearing outer ring 103. The upper surface of the two lower jaw portions fits against the bottom surface of the bearing outer ring 103, which can ensure the overall rigidity of the disassembly device during the pulling process.

[0066] The base plate 8 is located below the two movable jaws 6. The base plate 8 also restricts the downward movement of the two movable jaws 6. The rotating buckle 3 restricts the rectangular nut 4 in the connecting hole 71 from moving upward relative to the tooling body 7. When the screw 2 is turned, since the rectangular nut 4 cannot rotate in the connecting hole 71, the screw 2 rotates relative to the rectangular nut 4 and moves downward. When the valve disc 5 abuts against the upper end of the gearbox bearing support 104, if the screw is turned further, the screw 2 rotates relative to the rectangular nut 4 but cannot move downward. Thus, the two movable jaws 6, the tooling body 7, the base plate 8, the rectangular nut 4, the rotating buckle 3, and the overall structure formed by the bearing roller 101, the cage, and the bearing outer ring 103 move upward synchronously relative to the screw 2.

[0067] The gearbox bearing outer ring unloading device using this solution operates as follows: During use, the bottoms of the two movable jaws 6 are tightly fitted with the bearing outer ring 103. The rectangular nut 4, movable jaws 6, and tooling body 7 are connected to the bearing outer ring 103 as a single unit. Rotating the lead screw 2 causes it to move downwards until the lower end face of the valve disc 5 is tightly fitted with the mating surface of the gearbox bearing support. Continuing to rotate the transmission rod 1 prevents the lead screw 2 from moving downwards further. The rectangular nut 4, the two movable jaws 6, the tooling body 7, and the bearing outer ring 103 then move upwards relative to the lead screw 2, allowing the bearing outer ring 103 to be slowly pulled out. The bearing roller 101 is integrated with the cage and the bearing outer ring 103, with the lower jaw of the movable jaw 6 located below it. This prevents the roller from falling out and causing bearing damage during the pulling process, thus facilitating the disassembly of the gearbox bearing 10 outer ring. The movable pawl 6 is designed to accommodate the extremely special shape and position dimensions of the outer ring of the gearbox bearing 10. For example, when the bearing roller 101 is integrated with the cage and the outer ring 103, the outer ring 103 can be disassembled without damaging the bearing structure.

[0068] Specifically, refer to Figure 2 , 9 22. The upper end of the valve disc 5 is provided with a recess 51, and the lower end of the lead screw 2 can be inserted into the recess 51. The recess 51 is provided with a plurality of balls 53, which are located between the lead screw 2 and the inner wall of the recess 51. The lead screw 2 and the valve disc 5 can rotate relative to each other. The arrangement of the balls 53 can reduce the friction between the valve disc 5 and the bottom end of the lead screw 2.

[0069] Specifically, refer to Figure 2 , 922. A first annular groove 23 is provided on the side of the lower end of the lead screw 2, and a plurality of the balls 53 are located in the first annular groove 23. A second annular groove 52 is provided on the side wall of the recess 51, and a plurality of the balls 53 are located in the second annular groove 52. The openings of the first annular groove 23 and the second annular groove 52 are both horizontal and opposite to each other. The horizontal depth of the first annular groove 23 and the second annular groove 52 is less than the diameter of the balls 53. A plurality of the balls 53 are located between the first annular groove 23 and the second annular groove 52.

[0070] Specifically, refer to Figure 9 A connecting post 22 is protruding from the lower end face of the lead screw 2. The diameter of the connecting post 22 is smaller than the diameter of the lead screw 2. The first annular groove 23 is located on the connecting post 22.

[0071] Specifically, refer to Figure 2 , 10 11, 12, 13, 14, 15. Horizontal arc-shaped grooves 72 are provided on opposite side walls within the connecting hole 71. Two protrusions 32 are spaced apart on the outer side of the rotating buckle 3, each protrusion corresponding to and fitting with one of the arc-shaped grooves 72. The outer side of the tooling body 7 is adjacent to or in contact with the inner ring of the bearing. The rotating buckle 3 has a first central hole 31 at its center, through which the lead screw 2 can pass. The diameter of the first central hole 31 is slightly larger than the diameter of the lead screw 2 to facilitate its smooth passage and rotation. An annular boss forming a knob portion 34 is provided on the outer side of the upper end of the rotating buckle 3. The outer surface of the knob portion 34 can be frosted or other surfaces with high frictional resistance. The knob portion 34 facilitates the rotation of the rotating buckle 3. Four screws or bolts can also be installed at intervals on the upper part of the rotating buckle 3. The four nut structures protrude from the side of the rotating buckle 3. The four screws surround the outside of the rotating buckle 3 and are located on the same plane in the radial direction of the first central hole 31. At this time, the four screws or bolts protrude from the side of the rotating buckle 3 to form a knob part 34.

[0072] Specifically, refer to Figure 2 , 19 20, 21. The rectangular nut 4 has a threaded hole 41 at its center that is threaded to the lead screw 2. The upper end face of the rectangular nut 4 has an annular groove 42, the minimum diameter of which is larger than the diameter of the threaded hole 41. The lower end face of the rotating buckle 3 has an annular protrusion 33 that fits into the annular groove 42. The annular protrusion 33 can be embedded in the annular groove 42. A schematic diagram of the width direction of the rectangular nut 4 is shown below. Figure 19 As shown, a schematic diagram along the length direction is referenced. Figure 20 As shown.

[0073] Specifically, the lower part of the rectangular nut 4 is provided with a through hole 43 that is coaxial with and communicates with the threaded hole 41. The diameter of the through hole 43 is larger than the diameter of the threaded hole 41, and the diameter of the valve disc 5 is larger than the diameter of the threaded hole 41. The valve disc 5 can be inserted into the through hole 43.

[0074] Specifically, refer to Figure 1 , 2 10, 11, 12. The horizontal cross-section of the outer side of the tooling body 7 is circular and fits against the inner side of the integral structure formed by the bearing roller 101, the cage, and the bearing outer ring 103. The movable jaw 6 includes a first body 61, a second body 62, and a third body 63 connected in a U-shape from top to bottom, with the third body 63 forming the lower jaw portion. The width of the second body 62 is adapted to the width of the cross-section of the connecting hole 71. The length of the horizontal cross-section of the connecting hole 71 is not less than the horizontal length of the first body 61 and / or the third body 63. The vertical height of the tooling body 7 is not greater than the distance between the second bodies 62. The tooling body 7 can be inserted into the U-shaped opening of the two movable jaws. In use, the inner side of the tooling body 7 can fit tightly against the second body 62 of the two movable jaws 6.

[0075] Specifically, each of the two movable claws 6 has an arc-shaped recess 64 on the upper part of the side that is close to each other, and each arc-shaped recess 64 is located close to the rotating buckle 3. When four screws or bolts are used to form the knob part 34, the arc-shaped recess is used to avoid the two opposing screws or bolts on the rotating buckle 3. Each arc-shaped recess 64 can be semi-funnel-shaped, or set with a specific shape according to the actual situation, so as to avoid collision or interference with the two opposing bolts on the outside of the rotating buckle 3 during installation and use.

[0076] Specifically, the tooling body 7 includes an end plate 73 and a cylinder 74 fixedly connected from bottom to top. The end plate 73 is annular and its inner side is fixedly connected to the upper end of the cylinder 74. The first body 61 is located above the end plate 73 and is detachably fixedly connected to the end plate 73. Two positioning blocks 75 are provided at intervals on the upper surface of the end plate 73. The two positioning blocks 75 are respectively located on both sides of the connecting hole 71. The two positioning blocks 75 correspond to the two arc-shaped grooves 72 in the vertical direction, that is, the two positioning blocks 75 and the two arc-shaped grooves 72 are located on the same sides of the connecting hole 71. During assembly, the rotating buckle 3 is inserted downward along the connecting hole 71. The maximum distance between the two protrusions 32 is greater than the cross-sectional width of the connecting hole 71 but less than the cross-sectional length of the connecting hole 71. After the rotating buckle 3 is inserted into place, rotating the rotating buckle 3 by 90° will rotate the two protrusions 32 into the two arc-shaped grooves 72 respectively, thereby connecting the rotating buckle 3 with the tooling body 7. The rotating buckle 3 cannot move upward relative to the tooling body 7. The rotating buckle 3 and the base plate 8 together fix the rectangular nut 4 in the tooling body 7.

[0077] Specifically, the lower end of the cylinder 74 is provided with two notches 741 spaced apart, each notch 741 allowing the corresponding third body 63 to pass through horizontally, and the vertical depth of the notch 741 is adapted to the vertical thickness of the third body 63.

[0078] Specifically, two ball screws or bolts are mounted opposite each other on the top of the tooling body 7. Two nuts can be used to mate with the two ball screws or bolts to install them on two positioning blocks 75 on the top of the tooling body 7. Each positioning block 75 has a threaded mounting hole 751 that matches the respective ball screw. The outer side of the rotating buckle 3 has a first positioning groove 35 that matches the two ball screws. When the rotating buckle 3 is inserted downwards, the ball screws can slide relative to each other along the first positioning groove 35. Similarly, the outer side of the rectangular nut 4 has a second positioning groove 44 that matches the two ball screws. When the rectangular nut 4 is inserted downwards, the ball screws can slide relative to each other along the second positioning groove 44. During assembly, both the rotating buckle 3 and the rectangular nut 4 can move along the two oppositely arranged ball screws. The arrangement of the ball screws helps ensure the alignment of the first center hole 31 and the threaded hole 41, facilitates the connection of the ends of the rotating buckle 3 and the rectangular nut 4, and ensures that the annular protrusion 33 can be smoothly inserted into the annular groove 42. The inner walls of each of the first positioning grooves 35 and the second positioning grooves 44 are curved, and the openings of the first positioning grooves 35 are all smoothly transitioned. When the rotating buckle 3 is rotated, the ball screw can be disengaged from the first positioning groove 35 in the horizontal direction.

[0079] Specifically, each of the two movable claws 6 has an arc-shaped recess 64 on the upper part of the side that is close to each other. Each arc-shaped recess 64 is located close to the rotating buckle 3. The arc-shaped recess is used to avoid two opposing bolts or screws on the rotating buckle 3. Each arc-shaped recess 64 can be semi-funnel-shaped, or set with a specific shape according to the actual situation, so as to avoid collision or interference with the two opposing bolts on the outside of the rotating buckle 3 during installation and use.

[0080] Specifically, the bottom surface of the third main body 63 is flush with the bottom surface of the tooling main body 7, and the base plate 8 is located below the two third main bodies 63. The upper end of the base plate 8 is detachably fixed to the bottom end of the cylinder 74 by bolts or the like. The base plate 8 is annular, and the center of the base plate 8 has a second central hole 81 through which the valve disc 5 can pass. The base plate 8 can be fixed to the bottom end of the cylinder 74 of the tooling main body 7 by screws.

[0081] Specifically, the gearbox bearing outer ring unloading device of this solution also includes two spaced-apart handles 9, each handle 9 being approximately U-shaped. Each handle 9 has horizontally connected portions 91 at both ends, and each connected portion 91 is detachably fixedly connected to the end plate 73. The connection between each connected portion 91 and the end plate 73 can be achieved by bolt connection. The two connected portions 91 on each handle 9 can be located on both sides of a positioning block 75 along its length, and the two handles 9 are located on both sides of the connecting hole 71, facilitating the lifting of the entire device.

[0082] Specifically, the gearbox bearing outer ring unloading device of this solution also includes a transmission rod 1, which is horizontally arranged and detachably fixedly connected to the upper end of the lead screw 2. The upper end of the lead screw 2 has a horizontal through hole, through which the transmission rod 1 passes and is detachably fixedly connected to the lead screw 2. Both ends of the transmission rod 1 have protruding spherical limiting blocks 11, the diameter of which is larger than the diameter of the through hole. One spherical limiting block 11 can be fixedly connected to the transmission rod 1, either by welding or as a single piece, while the other spherical limiting block 11 can be detachably fixedly connected to the transmission rod 1, either by threaded connection.

[0083] The tooling body 7 and two movable jaws 6 in this design constitute a fastening mechanism, which is used to fix the integral structure formed by the bearing rollers 101, the cage, and the bearing outer ring 103. The transmission rod 1, the rotating buckle 3, the rectangular nut 4, the valve disc 5 with balls 53, and the lead screw 2 constitute a running mechanism. The running mechanism provides a pull-out mechanism for the integral structure formed by the bearing rollers 101, the cage, and the bearing outer ring 103 from the end face of the gearbox bearing support. The running mechanism is located in the middle part of the fastening mechanism and is connected to the rotating buckle 3. The lead screw 2 passes through the rotating buckle 3 and the rectangular nut 4 from top to bottom, and is movably connected to the valve disc 5 through the balls 53. The valve disc 5 with balls 53 ensures that the lead screw 2 does not cause the valve disc 5 with balls to rotate violently when rotating, thus preventing the end face of the gearbox bearing support 104, which contacts the bottom surface of the valve disc 5, from being scratched or worn. The transmission rod 1 facilitates the supply of power to the operating mechanism. The transmission rod 1 can also be powered by electric or pneumatic tools to reduce the disassembly time of the bearing outer ring 103, improving work efficiency and quality, and reducing workload. By reducing disassembly time, the risk of damage to the overall structure formed by the gearbox bearing support 104, bearing rollers 101, cage, and bearing outer ring 103 during disassembly is reduced.

[0084] When disassembling the bearing outer ring 103, first clean the mating surfaces of the integral structure formed by the bearing rollers 101, cage, and bearing outer ring 103 with the gearbox bearing support 104. Rotate the rotating latch 3 of the running mechanism 90°. At this time, the running mechanism can be disengaged from the fastening mechanism. Pull out the running mechanism and simultaneously retract the two movable jaws 6 of the fastening mechanism, that is, bring the two movable jaws 6 closer together to reduce the overall diameter of the fastening mechanism. Place the fastening mechanism as the bearing inner ring into the integral structure formed by the bearing rollers 101, cage, and bearing outer ring 103, and simultaneously extend the two movable jaws 6 of the fastening mechanism to make them fit tightly against the bearing outer ring 103. Then, the running mechanism is placed in, and the rotating buckle 3 of the running mechanism is rotated 90° so that the two protrusions 32 on the rotating buckle 3 are engaged in the two arc-shaped grooves 72 on the tooling body 7 of the fastening mechanism. At this time, the running mechanism, the fastening mechanism, and the integral structure formed by the bearing roller 101, the cage and the outer ring of the bearing 103 are connected as one. Rotate the transmission rod 1, and the lead screw 2 moves downward until the lower end face of the valve disc 5 is tightly fitted with the mating surface of the gearbox bearing support. Continue to rotate the transmission rod 1, and the lead screw 2 can no longer move downward relative to the valve. The rectangular nut 4, the tooling body 7, the two movable claws 6, the rotating buckle 3, the base plate 8 and other structures move upward relative to the lead screw 2 in sync. Since the third body 63 of the movable claw 6 and the base plate 8 are located below the integral structure formed by the bearing roller 101, the cage and the outer ring of the bearing 103, they can be slowly pulled upward.

[0085] The method of using the transmission rod 1 can be adjusted according to the disassembly range of the bearing outer ring 103. When the bearing outer ring 103 needs to move upward a large distance to complete the disassembly work, the transmission rod 1 can be driven to rotate by electric drive. The relevant electric drive method can be achieved by conventional technical means to reduce the disassembly time of the bearing outer ring 103, improve work efficiency and quality, and reduce work intensity. During operation, attention should be paid to ensuring the coaxiality of the disassembly device and the bearing outer ring 103 to ensure that the bearing outer ring 103 is disassembled smoothly without causing any damage to the gearbox bearing support 104.

[0086] The gearbox bearing outer ring removal device of this solution can smoothly remove the bearing outer ring 103 from the gearbox bearing support 104. After removal, check the gearbox bearing support 104 for scoring and wear on its end face. After disassembly, clean the gearbox bearing outer ring removal device and pay attention to the daily maintenance of the valve disc 5 with ball bearings 53 to ensure its service life and accuracy meet the disassembly requirements.

[0087] Other aspects of the gearbox bearing outer ring unloading device described in this utility model are found in the prior art and will not be repeated here.

[0088] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A gearbox bearing outer ring unloading device, characterized in that: It includes the main tooling body, a rectangular nut, a rotating buckle, a valve disc, a lead screw, a base plate, and two movable jaws; The tooling body has a vertically oriented connecting hole at its center. The width of the horizontal cross-section of the connecting hole is smaller than the length of the rectangular nut. The rectangular nut can be inserted into the connecting hole and detachably fixedly connected to the tooling body. The lower end of the lead screw passes vertically through the rotating buckle and is threadedly connected to the rectangular nut. The valve disc is located below the rectangular nut, and the bottom of the lead screw is rotatably fixedly connected to the upper end of the valve disc. The rotating buckle can be connected to the tooling body and is used to restrict the upward movement of the rectangular nut. The two movable claws are located on both sides of the rectangular nut in the length direction inside the connecting hole. Both movable claws are C-shaped and have opposite openings. The tooling body and the outer ring of the bearing can be inserted into the openings of the two movable claws. The bottom end of each movable claw is provided with a lower claw part that connects to the lower end face of the outer ring of the bearing. The base plate is located below the rectangular nut and connected to the main body of the tooling. The base plate allows the valve disc to pass through and restricts the downward movement of the rectangular nut.

2. The gearbox bearing outer ring unloading device according to claim 1, characterized in that: The upper end of the valve disc is provided with a recessed groove, and the lower end of the lead screw can be inserted into the recessed groove. The recessed groove is provided with a number of balls, and the balls are located between the lead screw and the inner wall of the recessed groove. The lead screw and the valve disc can rotate relative to each other.

3. The gearbox bearing outer ring unloading device according to claim 2, characterized in that: The two opposite side walls inside the connecting hole are horizontally provided with arc-shaped grooves, and the outer side of the rotating buckle is provided with two protrusions at intervals. The two protrusions correspond to and fit the two arc-shaped grooves respectively.

4. The gearbox bearing outer ring unloading device according to claim 3, characterized in that: The rectangular nut has a threaded hole at its center that is threaded to the lead screw, and the upper end face of the rectangular nut has an annular groove with a minimum diameter greater than the diameter of the threaded hole. The lower end face of the rotating buckle has an annular protrusion that fits the annular groove and can be embedded in the annular groove.

5. The gearbox bearing outer ring unloading device according to claim 4, characterized in that: The rectangular nut has a through hole at its lower part that is coaxial with and communicates with the threaded hole. The diameter of the through hole is larger than the diameter of the threaded hole, and the diameter of the valve disc is larger than the diameter of the threaded hole. The valve disc can be inserted into the through hole.

6. The gearbox bearing outer ring unloading device according to claim 5, characterized in that: Two ball screws are mounted opposite each other on the top of the tooling body. The outer side of the rotating buckle is provided with a first positioning groove that matches the two ball screws. The inner wall of each first positioning groove is arc-shaped.

7. The gearbox bearing outer ring unloading device according to claim 3, characterized in that: The movable jaw includes a first body, a second body, and a third body connected in a C-shape from top to bottom, with the third body forming the lower jaw portion; the width of the second body is adapted to the width of the cross-section of the connecting hole, the length of the horizontal cross-section of the connecting hole is not less than the horizontal length of the first body and / or the third body, and the vertical height of the tooling body is not greater than the distance between the second bodies.

8. The gearbox bearing outer ring unloading device according to claim 7, characterized in that: The tooling body includes an end plate and a cylinder that are fixedly connected to each other from bottom to top. The end plate is annular and its inner side is fixedly connected to the upper end of the cylinder. The first body is located above the end plate and is detachably fixedly connected to the end plate. The lower end of the cylinder is provided with two notches at intervals. Each notch allows the corresponding third body to pass through horizontally. The vertical depth of the notch is adapted to the vertical thickness of the third body. Two positioning blocks are provided at intervals on the upper surface of the end plate. The two positioning blocks are located on both sides of the connecting hole, and the two positioning blocks correspond to the two arc-shaped grooves in the vertical direction.

9. The gearbox bearing outer ring unloading device according to claim 8, characterized in that: The bottom surface of the third main body is flush with the bottom surface of the tooling main body. The base plate is located below the two third main bodies. The upper end of the base plate is detachably fixed to the bottom end of the cylinder. The base plate is annular, and the valve disc can pass through the center of the base plate.

10. The gearbox bearing outer ring unloading device according to claim 1, characterized in that: It also includes a handle, which is horizontally positioned and detachably fixed to the upper end of the lead screw.

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