CN220811599U - Lifting tool for replacing gear of gear box - Google Patents

Abstract

The utility model discloses a lifting tool for replacing gears of a gear box, which comprises a fixing frame, a horizontal sliding rail and a lifting tool body. The horizontal sliding rail is arranged on the fixing frame; the lifting tool body comprises a bearing assembly, a clamp and a plurality of rolling elements, wherein the bearing assembly is slidably arranged on the horizontal sliding rail, the clamp is arranged on the bearing assembly and is provided with an inner hole, the rolling elements can rotate along the axis of the rolling elements and are fixedly arranged on the clamp around the central circumference of the inner hole, and the rolling surfaces of the rolling elements can be enclosed to form a clamping space for limiting and fixing a gear box gear, so that the gear box gear can rotate around the gear axis in the clamping space. The tool can solve the problem that an existing tool cannot take out a horizontally arranged gear. In addition, through setting up the rolling element for when installing new gear line gear butt joint on the gear box, the gear box gear can rotate unhindered, thereby can carry out accurate butt joint with other transmission parts, improved butt joint quality and assembly efficiency.

Description

Lifting tool for replacing gear of gear box

Technical Field

The utility model belongs to the technical field of wind power gearboxes, and particularly relates to a hoisting tool for replacing a gear of a gearbox.

Background

Wind power gearboxes are one of the core components for wind power generation sets, and as the service life of fans increases or unexpected factors, some gear pieces in the wind power gearboxes are gradually worn out and even damaged, so that the damaged gear pieces need to be replaced. On a wind power gear box tower, the gear box is generally placed in a horizontal state, and the tool for vertically lifting and installing the gears is not applicable any more.

The prior art provides a device for changing wind-powered electricity generation gear box high-speed shaft, in the device, after passing through the bolt lock with upper semicircle ring and lower semicircle ring, can form the hole that the cover was located high-speed shaft to fixed high-speed shaft, then pulling chain block, chain block can pull the hoist and mount pole horizontal migration on the slide rail crossbeam, thereby take out high-speed shaft from the gear box. When the device is applied to take out damaged gears on the wind power gear box, and install the new gear butt joint on this wind power gear box, in actual conditions, still often need rotate the new gear to adjust the butt joint position and the butt joint angle of new gear and other transmission parts on the wind power gear box, thereby ensure the installation accuracy of new gear, but the device can't realize the rotation of gear, thereby can't guarantee the accurate butt joint of new gear and other transmission parts, and then lead to the change efficiency greatly reduced of new gear.

Based on the foregoing, a need exists for a lifting tool for replacing gear wheels of a gearbox to solve the technical problems in the prior art.

Disclosure of utility model

The utility model aims to provide a lifting tool for replacing gears of a gear box, which not only takes out a damaged gear horizontally placed in a wind power gear box along the horizontal direction, but also can realize the rotation of the gear in a lifting state, thereby ensuring the accurate butt joint of a new gear and other transmission parts in the wind power gear box and improving the butt joint quality and the assembly efficiency.

To achieve the purpose, the utility model adopts the following technical scheme:

Lifting tool for changing gear box gears, comprising:

A fixing frame;

The horizontal sliding rail is arranged on the fixing frame;

The lifting tool body comprises a bearing assembly, a clamp and a plurality of rolling elements, wherein the bearing assembly is slidably arranged on the horizontal sliding rail, the clamp is arranged on the bearing assembly and is provided with an inner hole, the rolling elements can rotate along the axis of the clamp and are circumferentially arranged on the center of the inner hole, and the rolling surfaces of the rolling elements can be enclosed to form a clamping space for limiting and fixing the gear box gear, so that the gear box gear can rotate around the gear axis in the clamping space.

Alternatively, the rolling element is a roller or a roller.

Optionally, the fixture comprises a first chuck and a second chuck which are arranged at intervals, the first chuck and the second chuck are both provided with the rolling piece, the first chuck and the second chuck are connected through an adjusting piece, and the adjusting piece is configured to change the relative distance between the first chuck and the second chuck so as to change the size of the clamping space.

Optionally, the first chuck is provided with a first sliding hole, and the second chuck is provided with a second sliding hole which is arranged corresponding to the first sliding hole;

The adjusting piece comprises a first upright post, a second upright post, a stud and a nut, wherein the first upright post comprises an external thread section and a first sliding column section, the sections of the external thread section and the first sliding column section are sequentially reduced along the axial direction of the first upright post, the first sliding column section is inserted into the first sliding hole in a limiting mode, the second upright post comprises an internal thread section and a second sliding column section, the sections of the internal thread are sequentially reduced along the sections of the axial direction of the second upright post, the sections of the second sliding column section are in threaded connection with the external thread section, the sections of the second sliding column section are inserted into the second sliding hole in a limiting mode, one end of the stud penetrates through the first upright post and the second upright post and is in threaded connection with one nut, and the other end of the stud is in threaded connection with the other nut.

Optionally, a plurality of adjusting members are respectively arranged at two opposite ends of the first chuck and the second chuck.

Optionally, the fixture is further provided with a stop piece, and the stop piece is arranged at one side of the clamping space along the axial direction of the gear box gear and can be abutted against the gear box gear.

Optionally, a limiting fixing piece is arranged on the stop piece, and the limiting fixing piece is detachably and fixedly connected to the gear box gear.

Optionally, the stop piece is around the central circumference of hole has seted up annular spout, spacing mounting slides and sets up in the annular spout.

Optionally, a hanging piece and a hanging piece which are in sliding connection with the horizontal sliding rail are arranged on the horizontal sliding rail;

The bearing assembly comprises a spandrel girder and a lifting part, one end of the spandrel girder is connected with the hanging part, the other end of the spandrel girder is fixedly connected with the clamp, and the lifting part is connected with the lifting part and is movably connected with the spandrel girder along the vertical direction.

Optionally, the lifting part comprises a hanging block and a hanging ring, the hanging block can be movably arranged on the spandrel girder along the vertical direction, the hanging ring is connected with the lifting part, and the hanging ring can be movably connected with the hanging block along the axial direction of the gear box gear.

The utility model has the beneficial effects that:

The utility model provides a lifting tool for replacing a gear box gear, when the lifting tool is used for disassembling and replacing the damaged gear box gear in the gear box, the damaged gear box gear which is horizontally arranged is clamped and fixed through the matching of a clamp and a plurality of rolling pieces, and then a bearing assembly horizontally moves on a horizontal sliding rail, so that the damaged gear box gear is taken out of the gear box, and the problem that the existing tool for vertically lifting the gear cannot take out the gear which is horizontally arranged is solved. In addition, because the rolling element in the lifting tool can rotate along the axis of the rolling element, when a new gear line gear is installed on the gear box in a butt joint mode, the gear box gear clamped by the rolling element can rotate around the gear axis in an unobstructed mode until the gear box gear rotates to an angle and a position capable of being accurately butted with other transmission parts in the gear box, and therefore assembly accuracy of the gear box gear is achieved, and butt joint quality and assembly efficiency are effectively improved.

Drawings

FIG. 1 is a schematic diagram of a lifting tool for replacing gear wheels of a gearbox;

FIG. 2 is an elevation view of a lifting tooling for replacing gear wheels of a gearbox provided by the utility model;

FIG. 3 is a side view of a lifting tooling for replacing gear wheels of a gearbox provided by the utility model;

FIG. 4 is a rear view of a lifting tooling for replacing gear wheels of a gearbox provided by the present utility model;

FIG. 5 is an enlarged fragmentary exploded view at A in FIG. 2;

fig. 6 is an enlarged partial exploded view at B in fig. 2.

In the figure:

100. A gearbox gear;

1. A load bearing assembly; 11. a spandrel girder; 111. hanging rings; 12. a lifting member; 121. hanging blocks; 122. a hanging ring;

2. A clamp; 21. a first chuck; 22. a second chuck; 23. an adjusting member; 231. a first upright; 2311. an external thread section; 2312. a first strut section; 232. a second upright; 2321. an internal thread segment; 2322. a second spool section; 233. a nut;

3. a rolling member; 301. A clamping space;

4. a stopper; 41. An annular chute;

5. And the limiting fixing piece.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to be within the scope of the present utility model.

The lifting tool for replacing the gear box gear 100 provided by the present utility model is described below with reference to fig. 1 to 6 and the specific embodiment. In the utility model, the lifting tool is mainly used for disassembling and replacing the gear 100 of the gear box which is horizontally arranged, so as to solve the problem that the existing tool for vertically lifting and installing the gear cannot act on the gear box which is horizontally arranged. In this embodiment, the hoisting tool is applied to a wind power gear box of a wind power tower, and of course, in other embodiments, the hoisting tool may also be applied to a gear box type in which other gear box gears 100 such as an industrial mixer gear box are horizontally arranged, which is not limited in the present utility model.

Specifically, as shown in fig. 1 and 2, the lifting tool comprises a fixing frame, a horizontal sliding rail and a lifting tool body. Wherein, the fixed mount is fixedly arranged, and the fixed mount can be a portal frame; the horizontal sliding rail is arranged on the fixing frame; the lifting tool body specifically comprises a bearing assembly 1, a clamp 2 and rolling elements 3, wherein the bearing assembly 1 is slidably arranged on a horizontal sliding rail, the clamp 2 is arranged on the bearing assembly 1 and is provided with an inner hole, the rolling elements 3 can rotate along the axis of the rolling elements 3, the rolling elements 3 are fixedly arranged on the clamp 2 around the central circumference of the inner hole, and the rolling elements 3 of the rolling elements 3 can be enclosed to form a clamping space 301 for limiting and fixing the gear box gear 100.

For example, when the gearbox gear 100 is replaced by using the lifting tool, the damaged gearbox gear 100 is clamped and fixed by the cooperation of the clamp 2 and the plurality of rolling elements 3, and then the bearing assembly 1 horizontally slides on the horizontal sliding rail, that is, the bearing assembly 1 moves on the horizontal sliding rail along the axial direction of the gearbox gear 100, so that the damaged gearbox gear 100 can be taken out from the gearbox, thereby solving the problem that the existing tool for vertically lifting gears cannot take out the horizontally arranged gear. The same procedure as above, after the fixture 2 and the rolling members 3 can cooperate to clamp and fix the new gear 100 of the gear box, the bearing assembly 1 moves along the horizontal rail towards the direction close to the gear box, and after the new gear 100 of the gear box is well abutted with other transmission components on the gear box, the installation of the new gear 100 of the gear box is completed. Because the rolling element 3 can rotate along the axis thereof, when a new gear wire and a new gear are in butt joint and are installed on the gear box, the gear box gear 100 clamped by the rolling element 3 can rotate around the gear axis in an unobstructed way, and the gear box gear 100 is installed after the gear box gear 100 rotates to an angle and a position capable of being in accurate butt joint with other transmission parts in the gear box, so that the defect that the existing device cannot ensure the accurate butt joint of the new gear box gear 100 and the other transmission parts is overcome, the assembly accuracy of the gear box gear 100 is realized, and the butt joint quality and the replacement efficiency of the gear box gear 100 are improved.

Optionally, the rolling element 3 in this embodiment may be a roller, and the contact surface between the roller and the gearbox gear 100 is smaller, which is beneficial to reducing the abrasion of the contact surface between the roller and the gearbox gear 100, and has a relatively long service life. The rolling member 3 may be a roller, and the contact surface between the roller and the gear box gear 100 is larger, so that the rolling surface of the roller can effectively disperse the load of the gear box gear 100 on the roller, and therefore the roller can clamp the gear box gear 100 with larger power, i.e. larger overall size and weight. Thus, the person skilled in the art can choose the specific type of rolling element 3 according to the actual clamping requirements.

When the gear box gear 100 is clamped by the rolling member 3 and is in a hanging state, in order to avoid the gear box gear 100 from shaking, falling, and the like, in this embodiment, the hanging tool further includes a stop member 4 fixedly disposed on the fixture 2. As shown in fig. 3 and 4, along the axial direction of the gear box gear 100, the stop member 4 is disposed at one side of the clamping space 301, and when the stop member 4 is abutted against the gear box gear 100, it can limit and block the gear box gear 100 in the axial direction, so as to prevent the gear box gear 100 from sliding with the rolling member 3 in a friction manner, so that the gear box gear 100 is separated from the rolling member 3 in the lifting process, and the safety and stability of the gear box gear 100 in the lifting process are ensured. Preferably, in the present embodiment, two stoppers 4 are disposed on the fixture 2 at intervals along the vertical direction, so as to respectively limit and block the upper and lower portions of the gear box gear 100 by the two stoppers 4, thereby further improving the limit reliability.

Further, the stop piece 4 is in an arc shape along the vertical direction towards one side close to the axis of the gear box gear 100, and the arc shape is matched with the shape of the outer side face of the gear box gear 100 shaft, so that collision friction between the stop piece 4 and the gear box gear 100 shaft is prevented, and the smooth and unobstructed clamping and fixing process of the gear box gear 100 by the hoisting tool is ensured.

As shown in fig. 1 and 4, the lifting tool provided in this embodiment further includes a limiting fixing member 5 disposed on the stop member 4, and when the stop member 4 abuts against the gear box gear 100, the limiting fixing member 5 can be assembled and fixedly connected with the gear box gear 100, so that opposite ends of the gear box gear 100 along the axial direction of the gear box gear 100 cannot be separated from the rolling member 3 in the lifting process, and stability and reliability of the lifting process of the gear box gear 100 are further improved. Optionally, in this embodiment, the limiting fixing member 5 is a threaded connecting member (bolt or screw), a through hole through which the threaded connecting member passes is formed in the stop member 4, a threaded hole (not shown in the drawing) is formed in the gearbox gear 100, a stud end of the threaded connecting member passes through the through hole and is screwed to the threaded hole, and an end cap of the threaded connecting member is abutted against the stop member 4, so that the gearbox gear 100 can be firmly limited in the clamping space 301 by cooperation of the threaded connecting member and the stop member 4.

Referring to fig. 4, the stop member 4 is provided with an annular chute 41 around the center circumference of the inner hole, the annular chute 41 is the through hole, the limit fixing member 5 passes through the annular chute 41 and then is connected with the gear box gear 100, and the limit fixing member 5 is slidably disposed in the annular chute 41, so as to prevent the limit fixing member 5 from moving on the stop member 4 to cause obstruction when the new gear box gear 100 rotates, and also ensure that the new gear box gear 100 continuously and stably rotates in the clamping space 301.

The load bearing assembly 1 is described in detail below with reference to fig. 1. Specifically, the bearing assembly 1 comprises a spandrel girder 11 and a lifting member 12, and a hanging member and a lifting member which are in sliding connection with the horizontal sliding rail are arranged on the horizontal sliding rail. The hanging piece can be connected with the hanging piece through a hanging ring 111 fixedly arranged at one end of the spandrel girder 11, the hanging piece can be a hook, and the other end of the spandrel girder 11 is fixedly connected with the clamp 2; the lifting member 12 is fixedly connected with the lifting member and can be movably connected to the spandrel girder 11 in the vertical direction. In the above-mentioned bearing assembly 1, the lifting member 12 can select a specific vertical position of the lifting spandrel girder 11 according to the power of the gear box (or according to the actual weight of the gear box 100), when the power of the gear box is high, it generally means that the gear box 100 has a large appearance and a heavy weight, and the lifting member 12 needs to be installed at a high position on the spandrel girder 11 to raise the center of gravity; when the power of the gearbox is smaller, which generally means that the gear 100 of the gearbox has a smaller shape and a lighter weight, the lifting member 12 needs to be installed at a lower position on the spandrel girder 11, so as to reduce the center of the whole lifting tool, which is helpful for improving the stability and balance of the process of lifting the gear 100 of the gearbox. When the lifting piece 12 lifts the gear box gear 100 so that the lifting force of the lifting piece is equal to the gravity of the gear box gear 100, the bearing beam 11 can be driven to move along the horizontal track through the hanging piece, so that the gear box gear 100 can be detached and replaced, the lifting piece 12 and the bearing beam 11 are separated clearly, and the cooperation is safe and stable.

More specifically, the lifting member 12 includes a lifting block 121 and a lifting ring 122, wherein the lifting block 121 is provided with a mounting through hole, and the spandrel girder 11 is provided with a plurality of threaded mounting holes along a vertical direction, and when a specific position of the lifting block 121 on the spandrel girder 11 is determined, the lifting block 121 and the spandrel girder 11 can be fixedly connected by passing through the mounting through hole and being in threaded connection with the threaded mounting holes by using a threaded connection member. The hanging ring 122 is connected to a hanging piece, and the hanging piece can be a chain, a rope or an electric hoist which can stretch in the vertical direction and is connected with the hanging ring 122; in this embodiment, the lifting ring 122 can be movably connected to the lifting block 121 along the axial direction of the gear box 100, when the thickness (length along the axial direction) of the gear box 100 is changed, the gravity center of the gear box 100 is also changed, and at this time, the lifting ring 122 can adjust and move on the lifting block 121 to adjust the gravity center in lifting, so that collision and abrasion with other transmission components such as the shaft of the gear box 100 caused by unbalance, inclination or swinging of the gear box 100 in the lifting process is avoided, and the lifting safety is improved.

The description of the clamp 2 in the body of the lifting tool is explained below with reference to fig. 2. Specifically, in the present embodiment, the jig 2 includes a first chuck 21, a second chuck 22, and an adjusting member 23 arranged at intervals in the vertical direction, the first chuck 21 and the second chuck 22 are of a plate-like structure, and one of the above-described stoppers 4 is fixedly provided on each of the first chuck 21 and the second chuck 22. The middle part of the first clamping head 21 is fixedly connected to the other end of the spandrel girder 11, and rolling elements 3 are respectively arranged at the two ends of the first clamping head 21; the two ends of the second chuck 22 are respectively provided with one rolling element 3, so that the above clamping space 301 is formed by the rolling surfaces of the four rolling elements 3 (only two rolling elements 3 positioned at the diagonal positions are marked in the figure), and the gear box gear 100 can be effectively and stably clamped by the mutual cooperation of the four rolling elements 3, so that the use cost is effectively controlled; the first chuck 21 and the second chuck 22 are connected through the adjusting member 23, and the adjusting member 23 can change the relative distance between the first chuck 21 and the second chuck 22, so that the two rolling members 3 positioned on the first chuck 21 and the two rolling members 3 positioned on the second chuck 22 can be relatively close to or far away from each other, and the size of the clamping space 301 enclosed by the four rolling members 3 can be changed. Through the arrangement, the lifting tool body can clamp the gear box gears 100 with different radial cross sections, and the application range of the lifting tool is greatly improved.

Specifically, in the present embodiment, as shown in fig. 5 and 6, the first collet 21 has a first slide hole, the second collet 22 has a second slide hole, and the second slide hole and the first slide hole are disposed opposite to each other; in addition, the adjusting member 23 specifically includes a first upright 231, a second upright 232, a stud (not shown in the figure), and a nut 233, where the first upright 231 has a hollow T-shaped structure, and includes an external threaded section 2311 and a first strut section 2312 that sequentially decrease in cross section along the axial direction thereof, and the first strut section 2312 is inserted into the first strut hole in a limited manner; the second upright 232 is also of a hollow T-shaped structure, and comprises an internal thread section 2321 and a second sliding column section 2322, the sections of which are sequentially reduced along the axial direction, the internal thread section 2321 is in threaded connection with the external thread section 2311, and the second sliding column section 2322 is inserted into the second sliding hole in a limiting manner; after the first upright post 231 and the second upright post 232 are sequentially penetrated through one end of the stud, the stud is in threaded connection with the nut 233 close to the second chuck 22, the nut 233 is abutted against the second chuck 22 in a fitting manner, the other end of the stud is in threaded connection with the nut 233 close to the first chuck 21, and the nut 233 is abutted against the first chuck 21 in a fitting manner.

In a specific operation, the nut 233 on the first chuck 21 may be loosened first, then the external thread segment 2311 on the first upright post 231 is rotated to adjust the length of the internal thread segment 2321 extending out of the external thread segment 2311, at this time, the first slide column segment 2312 may normally rotate in the first slide hole, and after the length of the internal thread segment 2321 is adjusted, the nut 233 on the first chuck 21 is screwed in a direction close to the first chuck 21 to abut against the first chuck 21 again, so that the adjustment of the space between the first chuck 21 and the second chuck 22 is realized, and the adjusting member 23 has the advantages of high adjustment precision, convenient adjustment, stability and reliability.

In order to improve the clamping stability between the first chuck 21 and the second chuck 22, in this embodiment, on the basis of being convenient for operation and adjustment, two adjusting members 23 are respectively disposed at opposite ends of the first chuck 21 and the second chuck 22, so that the connection between the first chuck 21 and the second chuck 22 is more stable, and loosening is prevented. Of course, in some other parallel embodiments, one, three or even more adjusting members 23 may be disposed at two opposite ends of the first chuck 21 and the second chuck 22, and the number of the adjusting members 23 specifically disposed is determined according to the specific radial cross-section size of the gearbox gear 100, and the length along the axial direction (i.e. the thickness of the gearbox gear 100) so long as the first chuck 21 and the second chuck 22 can be ensured to be firmly clamped, and the adjustment of the operator is convenient, which is within the scope of the present utility model.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A lift by crane frock for changing gear box gear, its characterized in that includes:

A fixing frame;

The horizontal sliding rail is arranged on the fixing frame;

The lifting tool body comprises a bearing assembly (1), a clamp (2) and a plurality of rolling elements (3), wherein the bearing assembly (1) is slidably arranged on the horizontal sliding rail, the clamp (2) is arranged on the bearing assembly (1) and is provided with an inner hole, the rolling elements (3) can rotate along the axis of the rolling elements and are circumferentially arranged on the center of the inner hole on the clamp (2), and the rolling surfaces of the rolling elements (3) can be closed to form a clamping space (301) for limiting and fixing the gear box gear (100), so that the gear box gear (100) can rotate around the gear axis in the clamping space (301).

2. Hoisting tool for changing gear box gears according to claim 1, characterized in that the rolling elements (3) are rollers or rollers.

3. Hoisting tool for replacing gearbox gears according to claim 1, characterized in that the clamp (2) comprises a first clamp head (21) and a second clamp head (22) arranged at intervals, the first clamp head (21) and the second clamp head (22) are both provided with the rolling element (3), the first clamp head (21) and the second clamp head (22) are connected through an adjusting element (23), and the adjusting element (23) is configured to change the relative distance between the first clamp head (21) and the second clamp head (22) so as to change the size of the clamping space (301).

4. A lifting tool for changing gear box gears according to claim 3, characterized in that the first collet (21) has a first slide hole and the second collet (22) has a second slide hole arranged in correspondence of the first slide hole;

The adjusting piece (23) comprises a first upright (231), a second upright (232), a stud and a nut (233), wherein the first upright (231) comprises an external thread section (2311) and a first sliding column section (2312) which are sequentially reduced in section along the axis direction of the first upright, the first sliding column section (2312) is limitedly inserted into the first sliding hole, the second upright (232) comprises an internal thread section (2321) and a second sliding column section (2322) which are sequentially reduced in section along the axis direction of the second upright, the internal thread section (2321) is in threaded connection with the external thread section (2311), the second sliding column section (2322) is limitedly inserted into the second sliding hole, one end of the stud is arranged in the first upright (231) and the second upright (232) in a penetrating mode, the other end of the stud is in threaded connection with the nut (233).

5. A lifting tool for replacing gear wheels of a gearbox according to claim 3, characterized in that the opposite ends of the first clamping head (21) and the second clamping head (22) are respectively provided with a plurality of adjusting members (23).

6. Hoisting tool for replacing gear box gears according to any one of claims 1-5, characterized in that the clamp (2) is further provided with a stop piece (4), and the stop piece (4) is arranged at one side of the clamping space (301) along the axial direction of the gear box gear (100) and can be abutted against the gear box gear (100).

7. Hoisting tool for replacing gear box gears according to claim 6, characterized in that the stop member (4) is provided with a limit fixing member (5), the limit fixing member (5) being detachably and fixedly connected to the gear box gear (100).

8. Hoisting tool for replacing gear box gears according to claim 7, characterized in that the stop piece (4) is provided with an annular chute (41) around the center circumference of the inner hole, and the limit fixing piece (5) is slidably arranged in the annular chute (41).

9. The lifting tool for replacing a gear of a gear box according to any one of claims 1 to 5, wherein a hanging piece and a lifting piece which are in sliding connection with the horizontal sliding rail are arranged on the horizontal sliding rail;

The bearing assembly (1) comprises a spandrel girder (11) and a lifting part (12), one end of the spandrel girder (11) is connected with the hanging part, the other end of the spandrel girder (11) is fixedly connected with the clamp (2), and the lifting part (12) is connected with the lifting part and is movably connected with the spandrel girder (11) along the vertical direction.

10. The lifting tool for replacing a gear box gear according to claim 9, wherein the lifting member (12) comprises a lifting block (121) and a lifting ring (122), the lifting block (121) is movably arranged on the spandrel girder (11) along the vertical direction, the lifting ring (122) is connected to the lifting member, and the lifting ring (122) is movably connected to the lifting block (121) along the axial direction of the gear box gear (100).