A dismounting tool

Abstract

The utility model discloses a kind of dismounting tools, comprising: locking shaft, including cooperation column and locking portion, the outside wall of cooperation column is provided with thread, locking portion is used for clamping to be pulled out column body;Locking nut, with cooperation column thread cooperation, locking nut and cooperation column thread cooperation can adjust locking portion opening degree. Its structure design makes tool can be directly locked and pull out the column body embedded in main body, without violent dismounting or overall replacement component, the collaborative matching of locking shaft, locking nut, solve the difficult problem of dismounting caused by the close clearance fit of precision column component (such as valve body, shaft etc.).

Description

TECHNICAL FIELD

[0001] The utility model relates to dismantling equipment field especially is related to a dismantling tool. BACKGROUND

[0002] In the field of mechanical assembly, when the columnar component (such as valve body, shaft, pipe joint, etc.) closely embedded in the main structure needs to be disassembled, and the assembly gap between the column and the main body is extremely small, the following technical problems commonly exist: the column and the main body are fixed by interference fit or buckle structure, and existing tools are difficult to take out without applying overload stress or local deformation. The specific performance is as follows: (1) conventional tools (such as wrench, pliers) cannot uniformly apply separation force, which is easy to cause the columnar component to bend, scratch the surface or damage the main structure; (2) plastic deformation is easy to occur during disassembly, which affects the sealing or precision of secondary assembly of the component; (3) the component needs to be replaced as a whole during fault maintenance, which significantly increases the maintenance cost and downtime. This problem widely exists in the fields of precision machinery, fluid system, automobile components and other fields with strict requirements on assembly precision and sealing, and a special disassembly tool is needed to accurately control the acting force and avoid local stress concentration. SUMMARY

[0003] In view of the above deficiencies of the prior art, the purpose of the present application is to provide a disassembly tool without applying overload stress or local deformation to at least solve one of the technical problems existing in the prior art.

[0004] The additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. Specifically, the technical solutions include the following:

[0005] In a first aspect, the embodiments of the present application provide a disassembly tool, comprising:

[0006] The locking shaft comprises a matching column and a locking part, and the outer side wall of the matching column is provided with a thread, and the locking part is used for clamping the column to be pulled out;

[0007] The locking nut is threadedly connected with the matching column, and the locking nut and the matching column are threadedly connected to adjust the opening degree of the locking part;

[0008] The utility model discloses a dismounting tool which is locked through the cooperation of the locking shaft and the locking nut, and solves the problem of difficult dismounting of precise cylindrical components (such as valve body, shaft and the like) caused by close clearance fit. The fitting column of the locking shaft is connected with the locking nut through thread connection to realize axial movement, and the interference fit between the locking nut and the outer wall of the locking part applies radial clamping force through rotation, so that the locking shaft and the column are tightly fixed, local stress concentration is avoided to cause deformation or damage, and thus nondestructive dismounting is realized. The structure design makes the tool directly lock and pull out the column embedded in the main body, violent dismounting or overall replacement of components is not needed, maintenance cost and downtime are significantly reduced, the sealing property and precision of secondary assembly are ensured, and the utility model is especially suitable for the fields of precise machinery, fluid systems and the like which have strict requirements on clearance precision.

[0009] In an embodiment, the fitting column and the locking part are coaxially connected along the same axis.

[0010] In an embodiment, the direction away from the fitting column of the locking part is the first direction, and the outer diameter of the locking part gradually increases along the first direction.

[0011] In an embodiment, in the free state, the outer peripheral wall of the locking part and the axis are mutually inclined.

[0012] In an embodiment, in the free state, the inner peripheral wall of the locking nut and the axis are mutually inclined.

[0013] In an embodiment, the locking part includes a plurality of locking pieces, a part of the plurality of locking pieces is connected to the fitting column, and another part of each locking piece encloses at least part of the column to be pulled out.

[0014] In an embodiment, the locking nut includes a fixed part, the inner diameter of the fixed part is smaller than the outer diameter of the first direction end of the locking shaft, and the inner diameter of the fixed part is larger than the outer diameter of the other end of the locking shaft.

[0015] In an embodiment, in the locked state, the inner wall of the fixed part and the outer wall of the locking part are interference fit.

[0016] In an embodiment, the dismounting tool further includes a locking shaft sleeve which is sleeved outside the locking shaft and the locking nut and is threadedly connected with the fitting column.

[0017] In an embodiment, the locking shaft sleeve includes a first fitting part, the locking nut includes a second fitting part, the first fitting part and the second fitting part are threadedly connected with the fitting column, and the second fitting part is located on the first direction side of the first fitting part.

[0018] In an embodiment, the axial length of the first fitting part is L1, the axial length of the second fitting part is L2, and the length of the thread is L3, and L3>L1+L2.

[0019] In an embodiment, the locking sleeve comprises a sleeve part arranged coaxially outside the locking shaft and the locking nut, the axial length of the sleeve part is L4, the axial length of the locking nut is L5, and L4>L5.

[0020] In an embodiment, a buffer gasket is further arranged at the inner circumferential wall of the locking part.

[0021] The dismounting tool of the utility model solves the problem of difficult dismounting of precise cylindrical components (such as valve body, shaft, etc.) caused by close clearance fit through the cooperation of the locking shaft, the locking nut and the locking sleeve. The fitting column of the locking shaft is connected with the locking nut through thread connection to realize axial movement, and the interference fit between the locking nut and the outer wall of the locking part applies radial clamping force through rotation, so that the locking shaft and the cylinder are tightly fixed, and local stress concentration is avoided to cause deformation or damage. The locking sleeve converts the rotary motion into axial pulling force through thread cooperation with the fitting column, ensures uniform and controllable force application, and realizes non-destructive dismounting. The structure design enables the tool to directly lock and pull out the cylinder embedded in the main body, converts the easy-to-operate rotary motion into accurate pulling force, does not need violent dismounting or overall replacement of components, significantly reduces maintenance cost and downtime, guarantees the sealing performance and precision of secondary assembly, and is especially suitable for precise machinery, fluid systems and other fields with strict clearance precision requirements. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0023] Figure 1 is a sectional view of the dismounting tool provided in an embodiment of the present application;

[0024] Figure 2 is an exploded view of the dismounting tool provided in an embodiment of the present application;

[0025] Figure 3 is a sleeve connection schematic view of the locking shaft provided in an embodiment of the present application;

[0026] Figure 4 is a locking state schematic view provided in an embodiment of the present application;

[0027] Figure 5 is a shaft sleeve installation schematic view provided in an embodiment of the present application;

[0028] Figure 6 is a pulling-out state schematic view provided in an embodiment of the present application;

[0029] REFERENCE SIGNS:

[0030] 1. Locking shaft; 11. Mating post; 12. Locking part; 2. Locking nut; 21. Second mating part; 22. Fixing part; 3. Locking bushing; 31. First mating part; 32. Sleeve part; 4. Buffer pad; 5. Post to be pulled out; 6. Valve island; A. First direction Detailed Implementation

[0031] To provide a more detailed understanding of the features and technical content of the embodiments of this utility model, the implementation of the embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this utility model. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0032] To address the shortcomings of existing technologies, the technical problem this invention aims to solve is to provide a specialized tool for disassembling and assembling the valve on the heat pump valve island 6. Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Specifically, it includes the following technical solutions:

[0033] In a first aspect, embodiments of this application provide a disassembly tool, including:

[0034] The locking shaft 1 includes a mating post 11 and a locking part 12. The outer side wall of the mating post 11 is provided with threads, and the locking part 12 is used to lock the pull-out post 5.

[0035] The locking nut 2 is threaded into the mating post 11, and the threaded engagement of the locking nut 2 with the mating post 11 allows for adjustment of the opening and closing degree of the locking part 12. (See also...) Figures 1-6 The locking shaft 1 is linked to the locking nut 2 through the thread of the mating column 11. The locking part 12 directly contacts the column body 5 (such as a valve body) to be pulled out. By rotating the locking nut 2, the opening degree of the locking part 12 is changed, clamping or releasing the object to be clamped. It can also adapt to columns of different diameters. The locking part 12 directly contacts the surface of the column body, avoiding the deformation caused by the edge clamping of traditional tools.

[0036] Furthermore, by replacing the locking part 12 or adjusting the locking plate structure, it can be applied to cylindrical parts of different sizes (such as shafts, bolts, etc.); furthermore, the disassembly tool provided by this utility model can be expanded into a modular tool, which can be adapted to different industrial equipment by replacing different locking parts 12, and is especially suitable for precision disassembly of electronic components (such as bearings, sensors, etc.), which is not limited here.

[0037] The utility model provides a dismounting tool solves the difficult problem of dismounting caused by the close clearance fit of the precise cylinder component (such as valve body, shaft and the like) through the cooperation of locking shaft 1 and locking nut 2. The cooperating column 11 of locking shaft 1 and locking nut 2 are connected through thread connection to realize axial movement, and the interference fit between locking nut 2 and the outer wall of locking portion 12 realizes radial clamping force by rotating, which tightly fixes locking shaft 1 and cylinder 5, avoids deformation or damage caused by local stress concentration, and realizes nondestructive dismounting. The structure design makes the tool directly lock and pull out the cylinder embedded in the main body, converts the easy-to-operate rotary motion into accurate pulling-out force, does not need violent dismounting or overall replacement of components, significantly reduces maintenance cost and downtime, simultaneously guarantees the sealing property and precision of secondary assembly, and is especially suitable for the fields of precise machinery, fluid systems and the like with strict clearance precision requirements.

[0038] In one embodiment, as Figure 1 The cooperating column 11 and the locking portion 12 are coaxially connected along the same axis, the coaxial design ensures uniform force when rotating the locking nut 2, prevents the tool from tilting or slipping, and the axis consistency ensures that the pulling-out force is vertically applied to the cylinder 5, avoiding damage to the surface of the component by horizontal force, thereby ensuring that the cooperating column 11 of the locking shaft 1 is coaxial with the locking portion 12, and avoiding instability caused by deviation.

[0039] In one embodiment, the direction away from the cooperating column 11 of the locking portion 12 is a first direction A, and the outer diameter of the locking portion 12 gradually increases along the first direction A, that is, the locking portion 12 is in a conical structure, and the conical design makes the locking portion 12 in an open state in a free state, and when the locking nut 2 is tightened, the conical surface is pressed inward to shrink, forming a clamping force.

[0040] In one embodiment, in a free state, the outer peripheral wall of the locking portion 12 and the axis are arranged to be inclined to each other. Specifically, the outer peripheral wall of the locking portion 12 intersects with the plane where the axis is located to form an intersection line, and the intersection line and the axis are inclined to intersect. It should be noted that the inclined structure makes the locking portion 12 maintain an open state when not stressed, and when the locking nut 2 is rotated in the first direction A, the inclined surface and the interference fit of the inner wall of the nut prevent the locking portion 12 from accidentally loosening. It should be noted that the free state refers to the initial state when the locking nut 2 does not contact the locking portion 12.

[0041] In one embodiment, in a free state, the inner peripheral wall of the locking nut 2 and the axis are arranged to be inclined to each other. Specifically, the principle is the same as the above-mentioned inclination, and its role is to make the inner wall of the locking nut 2 in a free state and the axis form a slight inclination angle, which can give the cylinder a diagonal component force when pulling out the cylinder, improve the clamping firmness, and at the same time, the inclined inner wall of the locking nut 2 and the conical outer wall of the locking portion 12 form a wedge-shaped fit to generate axial clamping force when rotating, facilitating pulling out.

[0042] In one embodiment, the locking portion 12 comprises a plurality of locking pieces, a part of the plurality of locking pieces is connected to the fitting column 11, and another part of each locking piece encloses at least part of the column body 5 to be pulled out. Specifically, the locking portion 12 is composed of a plurality of independent locking pieces, forming an openable and closable clamping structure, and the plurality of pieces allows each piece to independently elastically deform during clamping, so as to more flexibly and comprehensively clamp the column body 5 to be pulled out.

[0043] In one embodiment, the locking nut 2 comprises a fixing portion 22, the inner diameter of the fixing portion 22 is smaller than the outer diameter of the first direction end of the locking shaft 1, and the inner diameter of the fixing portion 22 is greater than the outer diameter of the other end of the locking shaft 1. The inner diameter of the fixing portion 22 being smaller than the outer diameter of the first direction end of the locking shaft 1 limits the movement of the fixing portion 22 along the first direction A, i.e., the axial position of the fixing portion 22, preventing the locking portion 12 from being separated from the locking shaft 1; the inner diameter of the fixing portion 22 being greater than the outer diameter of the other end of the fitting column 11 allows the fixing portion 22 to wrap around the outside of the locking shaft 1, thereby cooperating with the locking portion 12 to form a clamping. The difference in inner diameter controls the movement stroke of the locking portion 12, ensuring that the clamping force is controllable.

[0044] In one embodiment, in the locked state, the inner wall of the fixing portion 22 and the outer wall of the locking portion 12 are in interference fit, and the interference fit generates an additional clamping force through elastic deformation of the material, preventing loosening caused by vibration or external force.

[0045] In one embodiment, referring to Figure 1 , 2 , 6, the dismounting tool further comprises a locking shaft sleeve 3, which is sleeved outside the locking shaft 1 and the locking nut 2 and is threadedly connected with the fitting column 11. Specifically, the locking shaft sleeve 3 is sleeved outside the locking shaft 1 and the locking nut 2 and is threadedly coupled with the fitting column 11. When the locking shaft sleeve 3 is rotated, the thread coupling converts the rotary motion into an axial pulling force. At the same time, the sleeve can also provide a gripping point to avoid direct contact with the high-temperature area of the locking nut 2 or the locking shaft 1.

[0046] In one embodiment, the locking shaft sleeve 3 comprises a first fitting portion 31, and the locking nut 2 comprises a second fitting portion 21, the first fitting portion 31 and the second fitting portion 21 are threadedly coupled with the fitting column 11, and the second fitting portion 21 is located on the first direction side of the first fitting portion 31, that is, the locking nut 2 and the locking shaft sleeve 3 are both threadedly coupled with the fitting column 11. Since the locking nut 2 is located inside the locking shaft sleeve 3, the thread coupling position of the locking nut 2 is also lower than the coupling position of the locking shaft sleeve 3 with the fitting column 11, i.e., it is more biased towards the first direction position.

[0047] In one embodiment, as Figure 1, the axial length of the first fitting part 31 is L1, the axial length of the second fitting part 21 is L2, and the length of the thread is L3, and L3>L1+L2. Specifically, the total length L3 of the thread needs to be greater than L1+L2, so as to ensure that the locking nut 2 can be freely moved, and L3>L1+L2 provides an additional moving distance for the locking nut 2, thereby reserving a stroke for pulling out the column 5, so that when the rotating locking sleeve 3 is rotated, the locking shaft 1 can continuously move upward, thereby pulling out the valve (the column 5).

[0048] In an embodiment, as Figure 1 , the locking sleeve 3 comprises a sleeve part 32, which is coaxially arranged outside the locking shaft 1 and the locking nut 2, the axial length of the sleeve part 32 is L4, the axial length of the locking nut 2 is L5, and L4>L5. Specifically, the axial length L4 of the sleeve part 32 is greater than the axial length L5 of the locking nut 2, so as to provide a certain moving space for the locking nut 2, so that the locking nut 2 can be relatively moved in the sleeve part 32, thereby achieving. It should be noted that the difference between L4 and L5 should be greater than the shortest distance required for the column 5 to be pulled out to move outward from the component where it is located.

[0049] In an embodiment, as Figure 2 , the buffer gasket 4 is arranged at the inner circumferential wall of the locking part 12. Specifically, the buffer gasket 4 is embedded in the inner circumferential wall of the locking part 12, and the buffer gasket 4 fills the gap between the locking pieces, so as to avoid direct contact between the metal and the surface of the column 5; at the same time, the buffer gasket 4 can absorb the impact force during clamping, prevent the brittle component (such as glass or ceramic) from being broken, and play a shock-absorbing role.

[0050] Further, the material of the buffer gasket 4 can be rubber, polyurethane material, even soft rubber, metal, plastic, etc., which is not limited here.

[0051] As Figures 3-6 , the working process of the dismounting tool provided by the utility model is as follows:

[0052] First, the bottom of the locking shaft 1 is sleeved on the column 5 to be pulled out, the surface of the column is relatively smooth, and the buffer gasket 4 is used to increase the friction force between the locking shaft 1 and the column; after being sleeved on the column 5, the locking nut 2 is twisted, the locking nut 2 moves in the first direction A, and the locking shaft 1 and the column are fixed by the mutual cooperation of the inclined surfaces of the locking nut 2 and the locking shaft 1.

[0053] Next, twist the locking sleeve 3, when the bottom of the locking sleeve 3 is attached to the valve island 6 (i.e. the structure before the column body 5 is pulled out), at this time the bottom of the locking sleeve 3 is in contact with the valve island 6 and cannot be further downward, continue to twist the locking sleeve 3, the dismounting tool will convert the rotary motion into axial upward motion of the locking shaft 1, the position of the locking sleeve 3 relative to the valve island 6 does not change, and the locking shaft 1 with the locked column body 5 moves axially upward, thereby pulling out the column body 5.

[0054] Finally, the valve is pulled out and still fixed on the dismounting tool, the locking sleeve 3 needs to be removed, and the locking nut 2 is rotated in the opposite direction relative to the locking shaft 1, so that the complete valve can be taken out. Because of the gasket, the entire valve taking process will not cause any scratches and deformation to the column body 5.

[0055] It is worth mentioning that the dismounting tool is not limited to taking out the valve, and any smooth cylindrical body that needs to be pulled out can be locked by adjusting the diameter of the bottom hole of the locking shaft 1, and the object can be easily taken out by rotating the locking sleeve 3.

[0056] The dismounting tool of the utility model solves the problem of difficult dismounting of precise column components (such as valve body, shaft, etc.) caused by tight clearance fit through the cooperation of the locking shaft 1, the locking nut 2 and the locking sleeve 3. The matching column 11 of the locking shaft 1 and the locking nut 2 are connected by threads to realize axial movement, and the interference fit between the locking nut and the outer wall of the locking part 12 applies radial clamping force through rotation, so that the locking shaft 1 and the column body 5 are tightly fixed, avoiding deformation or damage caused by local stress concentration. The locking sleeve 3 converts the rotary motion into axial pulling force through the thread cooperation with the matching column 11, ensuring uniform and controllable force, thereby realizing non-destructive dismounting. The structure design enables the tool to directly lock and pull out the column body 5 embedded in the main body, converts the easy-to-operate rotary motion into precise pulling force, eliminates the need for violent dismounting or overall replacement of parts, significantly reduces maintenance cost and downtime, and ensures the sealing and precision of secondary assembly, especially suitable for precise machinery, fluid systems and other fields with strict gap precision requirements.

[0057] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. It should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the present specification, they mean that the features, steps, operations, devices, components and / or combinations thereof are present.

[0058] Unless specifically stated otherwise, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in the examples herein are not meant to limit the scope of the present application. Also, it is to be understood that the herein shown and discussed examples are merely for the purposes of illustration and that the technology, methods and devices known to those of ordinary skill in the art can not be discussed in detail. In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and are not intended to limit the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values. It is to be noted that like reference numerals and letters in the various drawings herein refer to like items unless otherwise specifically noted, and, as such, further discussion of the same is not necessary in subsequent drawings.

[0059] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0060] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. Well, the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0061] In addition, it needs to be explained that the use of "first", "second" and the like words to limit the parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as the restriction of the scope of protection of the utility model.

[0062] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A disassembly tool, characterized in that, include: The locking shaft includes a mating post and a locking part. The outer wall of the mating post is provided with threads, and the locking part is used to lock the post body from being pulled out. A locking nut is threaded into the mating post, and the locking nut and the mating post are threaded together to adjust the opening degree of the locking part.

2. The disassembly tool according to claim 1, characterized in that, The mating column and the locking part are coaxially connected along the same axis.

3. The disassembly tool according to claim 2, characterized in that, The direction in which the locking part is away from the mating post is the first direction, and the outer diameter of the locking part gradually increases along the first direction.

4. The disassembly tool according to claim 2, characterized in that, In the free state, the outer peripheral wall of the locking part is inclined to the axis.

5. The disassembly tool according to claim 3, characterized in that, In its free state, the inner circumferential wall of the locking nut is inclined to the axis.

6. The disassembly tool according to claim 1, characterized in that, The locking part includes a plurality of locking plates, a portion of which is connected to the mating post, and another portion of each locking plate surrounds to at least partially engage the post to be pulled out.

7. The disassembly tool according to claim 3, characterized in that, The locking nut includes a fixing part, the inner diameter of which is smaller than the outer diameter of the first direction end of the locking shaft, and the inner diameter of the fixing part is larger than the outer diameter of the other end of the locking shaft.

8. The disassembly tool according to claim 7, characterized in that, In the locked state, the inner wall of the fixing part and the outer wall of the locking part are interference-fitted.

9. The disassembly tool according to claim 1, characterized in that, Also includes: A locking bushing is fitted over the locking shaft and the locking nut and is threaded into the mating post.

10. The disassembly tool according to claim 9, characterized in that, The locking bushing includes a first mating part, and the locking nut includes a second mating part. The first mating part and the second mating part are engaged by a threaded joint, and the second mating part is located on the first direction side of the first mating part.

11. The disassembly tool according to claim 10, characterized in that, The axial length of the first mating part is L1, the axial length of the second mating part is L2, and the length of the thread is L3, where L3 > L1 + L2.

12. The disassembly tool according to claim 9, characterized in that, The locking bushing includes a sleeve portion, which is coaxially sleeved outside the locking shaft and the locking nut. The axial length of the sleeve portion is L4, and the axial length of the locking nut is L5, where L4 > L5.

13. The disassembly tool according to claim 1, characterized in that, It also includes a buffer pad, which is disposed on the inner peripheral wall of the locking part.

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