Expanding sleeve dismounting tool

Abstract

The application relates to a dismounting tool for an expansion sleeve, which comprises a pressing plate provided with a through hole and used for abutting against the end of a main shaft, and a pressing rod group comprising a pull rod and a pressing nut, wherein the pull rod is provided with an external thread, one end of the pull rod is connected with the expansion sleeve, the other end of the pull rod is slidably arranged in the through hole, and the pressing nut is arranged on the side of the pressing plate away from the main shaft and is threadedly connected with the pull rod. The positioning is realized through the connection of the pull rod and the expansion sleeve, the connection of the pressing nut and the pull rod and the abutment of the pressing plate and the main shaft, the position of the dismounting tool for the expansion sleeve does not need to be repeatedly adjusted, and the dismounting work of the expansion sleeve can be conveniently and quickly completed.

Description

Technical Field

[0001] This application relates to the field of maintenance equipment technology, and in particular to an expansion sleeve disassembly tool. Background Technology

[0002] As a key basic component for achieving mechanical connection under heavy loads, the expansion sleeve has been widely used in many industrial fields due to its unique working principle, which relies on tightening high-strength bolts to generate pressure and friction between the inner surfaces, thereby achieving effective load transfer.

[0003] Jacks are commonly used auxiliary tools during the disassembly of expansion sleeves. However, existing jacks are often difficult to position accurately when working with expansion sleeves. Each operation requires a lot of time for adjustment and fixation, which greatly affects the maintenance efficiency of the equipment and increases the downtime of the equipment and the operating costs of the enterprise. Utility Model Content

[0004] Based on this, an expansion sleeve disassembly tool is provided to facilitate the disassembly of the expansion sleeve.

[0005] This application provides an expansion sleeve disassembly fixture for disassembling an expansion sleeve fitted on a spindle. The expansion sleeve disassembly fixture includes: a pressure plate with a through hole for abutting against the end of the spindle; and a pressure rod assembly including a pull rod and a pressure nut. The pull rod has an external thread, one end of which is connected to the expansion sleeve, and the other end is slidably inserted through the through hole. The pressure nut is located on the side of the pressure plate away from the spindle and is threadedly connected to the pull rod.

[0006] According to one embodiment of this application, multiple pressure rod groups are provided corresponding to the through holes, and the multiple pressure rod groups are arranged circumferentially around the main shaft and are respectively connected to the expansion sleeve.

[0007] According to one embodiment of this application, the pull rod is threadedly connected to the expansion sleeve through a threaded hole provided in the expansion sleeve.

[0008] According to one embodiment of this application, the end of the pressure plate opposite to the main shaft is provided with at least one first lifting screw hole for connecting the lifting lug; and / or, the side wall of the pressure plate is provided with at least one second lifting screw hole for connecting the lifting lug.

[0009] According to one embodiment of this application, the pressure plate is provided with a plurality of first lifting screw holes at one end away from the main shaft, and the plurality of first lifting screw holes are arranged in a rectangular or circular array along the end face of the pressure plate; and / or, the side wall of the pressure plate is provided with a plurality of second lifting screw holes, and the plurality of second lifting screw holes are arranged circumferentially along the side wall of the pressure plate.

[0010] According to one embodiment of this application, it further includes: a positioning slider, which is slidably connected to one end of the pressure plate near the main shaft along the radial direction of the main shaft, and a plurality of positioning sliders are arranged around the main shaft in a circumferential direction; and a locking member, which is arranged in a plurality of corresponding to the positioning sliders, and the locking member is used to lock the relative position of the corresponding positioning slider and the pressure plate.

[0011] According to one embodiment of this application, the locking member includes a positioning bolt threadedly connected to the positioning slider. The positioning bolt is configured to switch between a locked state and an unlocked state. In the locked state, the positioning bolt is connected to the pressure plate, and in the unlocked state, the positioning bolt is disengaged from the pressure plate.

[0012] According to one embodiment of this application, the positioning slider is provided with a threaded through hole along the axis of the main shaft, and the positioning bolt is threadedly connected to the positioning slider through the threaded through hole. In the locked state, the end of the positioning bolt facing the pressure plate abuts against the pressure plate.

[0013] According to one embodiment of this application, the pressure plate is provided with a trapezoidal groove, and the positioning slider is provided with a trapezoidal sliding joint, the trapezoidal sliding joint being slidably connected to the pressure plate through the trapezoidal groove.

[0014] According to one embodiment of this application, the positioning slider has an arc-shaped surface on the side near the main shaft.

[0015] In the aforementioned expansion sleeve disassembly fixture, during use, the pull rod of the pressure rod assembly is connected to the expansion sleeve, and the other end is threadedly connected to the pressure nut. The pressure plate abuts against the end of the main shaft. By rotating the pressure nut, the distance between the pressure nut and the end of the pull rod connected to the expansion sleeve can be reduced. At this time, the pressure nut applies pressure to the main shaft through the pressure plate and applies tension to the expansion sleeve through the pull rod, causing the expansion sleeve to move towards the pressure plate until it moves a certain distance and then disengages from the inner expansion sleeve of the coupling, completing the disassembly of the expansion sleeve. During this process, positioning is achieved through the connection between the pull rod and the expansion sleeve, the connection between the pressure nut and the pull rod, and the abutment between the pressure plate and the main shaft. The position of the expansion sleeve disassembly fixture does not need to be repeatedly adjusted, allowing for convenient and quick disassembly of the expansion sleeve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an expansion sleeve disassembly tool according to an embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the structure of the hidden pressure rod assembly of the expansion sleeve disassembly tooling according to an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the positioning slider, pressure plate, and main shaft cooperation structure of an expansion sleeve disassembly tool according to an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the positioning slider and locking component installation structure of an expansion sleeve disassembly tool according to an embodiment of this application.

[0020] Figure label:

[0021] 100. Spindle;

[0022] 200, Expansion sleeve; 210, Threaded hole;

[0023] 300, Pressure plate; 310, Through hole; 320, First lifting screw hole; 330, Second lifting screw hole; 340, Trapezoidal groove;

[0024] 400, Pressure rod assembly; 410, Tie rod; 411, External thread; 420, Pressure nut;

[0025] 500. Positioning slider; 510. Threaded through hole; 520. Trapezoidal sliding joint; 530. Arc-shaped surface;

[0026] 600. Locking components. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] Combination Figure 1 and Figure 2 An embodiment of this application provides an expansion sleeve 200 disassembly fixture for disassembling the expansion sleeve 200 fitted on the spindle 100. The expansion sleeve 200 disassembly fixture includes a pressure plate 300 and a pressure rod assembly 400. The pressure plate 300 is provided with a through hole 310 and is used to abut against the end of the spindle 100. The pressure rod assembly 400 includes a pull rod 410 and a pressure nut 420. The pull rod 410 is provided with an external thread 411. One end of the pull rod 410 is connected to the expansion sleeve 200, and the other end is slidably inserted through the through hole 310. The pressure nut 420 is located on the side of the pressure plate 300 away from the spindle 100 and is threadedly connected to the pull rod 410.

[0034] In this embodiment, the pressure plate 300 is in close contact with the end of the spindle 100, enabling stable pressure to be applied to the spindle 100. One end of the pull rod 410 is reliably connected to the expansion sleeve 200, and the other end passes through the through hole 310 of the pressure plate 300 and is threadedly engaged with the pressure nut 420. When the pressure nut 420 is rotated, it applies pressure to the pressure plate 300 toward the spindle 100, while the pull rod 410 applies a pulling force to the expansion sleeve 200 toward the pressure plate 300. Under this force, the expansion sleeve 200 moves axially toward the pressure plate 300 along the spindle 100. The expansion sleeve 200 disassembly fixture provided in this embodiment can quickly achieve positioning of the expansion sleeve 200 and the spindle 100 without repeated position adjustments, effectively reducing operation time; and through the threaded transmission of force, it can accurately control the magnitude of the tension, avoiding sudden changes in tension from impacting the expansion sleeve 200 and the spindle 100, ensuring the smoothness of the disassembly process, and thus protecting the expansion sleeve 200 and the spindle 100 from damage.

[0035] In some embodiments, multiple pressure rod assemblies 400 are provided corresponding to the through holes 310. The multiple pressure rod assemblies 400 are arranged circumferentially around the main shaft 100 and are respectively connected to the expansion sleeve 200.

[0036] In this embodiment, multiple pressure rod assemblies 400 are evenly arranged circumferentially along the main shaft 100. Each pressure rod assembly 400 has a tie rod 410 connected to the expansion sleeve 200, allowing the expansion sleeve 200 to be subjected to multiple evenly distributed tensile forces circumferentially. During disassembly, each tie rod 410 applies tensile force to the expansion sleeve 200 synchronously, effectively preventing the expansion sleeve 200 from tilting or deforming due to uneven force distribution. This improves the symmetry of the force on the expansion sleeve 200, ensuring smooth axial movement of the expansion sleeve 200 along the main shaft 100. Furthermore, it distributes the load borne by a single tie rod 410, reducing the risk of damage to the tie rod 410 due to excessive force and extending the service life of the tooling.

[0037] Optionally, 12 pressure rod groups 400 can be set. The 12 pressure rod groups 400 are evenly distributed around the expansion sleeve 200, which can effectively ensure that the expansion sleeve 200 is subjected to uniform force, further improve the stability of the disassembly process, and avoid increasing the difficulty of operation by having too many pressure rod groups 400.

[0038] During operation, a hydraulic wrench can be used to apply pressure evenly to each pressure nut 420. The pressure is applied in a certain order to ensure that the pressure on each pressure nut 420 is uniform and consistent, thereby ensuring that the expansion sleeve 200 is subjected to uniform force and avoiding excessive local force that could lead to deformation or damage.

[0039] In some embodiments, the pull rod 410 is threadedly connected to the expansion sleeve 200 through a threaded hole 210 provided in the expansion sleeve 200.

[0040] In this embodiment, the threaded hole 210 on the expansion sleeve 200 matches the external thread 411 of the pull rod 410, and the pull rod 410 is connected to the expansion sleeve 200 by screwing into the threaded hole 210. This threaded connection method ensures the connection strength between the pull rod 410 and the expansion sleeve 200, preventing slippage during tensile force transmission and ensuring that the tensile force can be effectively applied to the expansion sleeve 200. Simultaneously, the threaded connection is detachable, facilitating the removal of the pull rod 410 from the expansion sleeve 200 after disassembly, thus enabling the reuse of the tooling. Furthermore, the connection length between the pull rod 410 and the expansion sleeve 200 can be adjusted by the thread engagement depth to accommodate the disassembly requirements of expansion sleeves 200 of different thicknesses.

[0041] Optionally, the tie rod 410 is an M22 type screw with a hardness of 12.9, which has extremely high strength and load-bearing capacity and can stably transmit tensile force.

[0042] In some embodiments, the end of the pressure plate 300 opposite to the main shaft 100 is provided with at least one first lifting screw hole 320 for connecting the lifting lug. And / or, the side wall of the pressure plate 300 is provided with at least one second lifting screw hole 330 for connecting the lifting lug.

[0043] When the pressure plate 300 is heavy, it can be connected to lifting equipment (such as a crane or forklift) via lifting lugs. Using lifting equipment to move the pressure plate 300 reduces the labor intensity of manual handling, avoids damage caused by improper handling, and also reduces the risk of injury to operators. Furthermore, lifting equipment makes it easier to control the position of the pressure plate 300 during handling, facilitating precise movement to the end of the main shaft 100 and its contact with it, thus improving the efficiency and accuracy of installation positioning.

[0044] Multiple first lifting screw holes 320 and second lifting screw holes 330 can be provided according to the weight and size of the pressure plate 300, and the thread specifications are matched with the mounting bolts of the lifting lugs to ensure that the lifting lugs are firmly connected to the pressure plate 300 and to prevent them from falling off during the lifting process.

[0045] Optionally, the pressure plate 300 is also provided with the aforementioned first lifting threaded hole 210 and second lifting threaded hole 230. The first lifting threaded hole 320 and the second lifting threaded hole 330 complement each other. When the end face space of the pressure plate 300 is limited or the lifting lug cannot be installed on the end face due to structural limitations, lifting can be achieved through the second lifting threaded hole 330 on the side wall. The simultaneous provision of the first lifting threaded hole 210 and the second lifting threaded hole 230 increases the flexibility of the handling method of the pressure plate 300, enabling it to adapt to different working environments and site conditions, ensuring convenient handling and installation positioning of the pressure plate 300 under various circumstances, and further enhancing the practicality of the tooling.

[0046] In some embodiments, the pressure plate 300 is provided with a plurality of first lifting screw holes 320 at one end away from the main shaft 100, and the plurality of first lifting screw holes 320 are arranged in a rectangular or circular array along the end face of the pressure plate 300.

[0047] In this embodiment, multiple first lifting screw holes 320 are distributed in a rectangular or circular array along the end face of the pressure plate 300. This distribution allows the pressure plate 300 to be connected to multiple lifting lugs according to actual needs during transportation, so that the pressure plate 300 can remain balanced during the lifting process and avoid tilting.

[0048] In some embodiments, the sidewall of the pressure plate 300 is provided with a plurality of second lifting screw holes 330, which are arranged circumferentially along the sidewall of the pressure plate 300.

[0049] In this embodiment, multiple second lifting screw holes 330 are arranged circumferentially along the side wall of the pressure plate 300, allowing lifting lugs to be installed at different positions on the side wall of the pressure plate 300. This circumferential arrangement allows for flexible selection of the lifting lug installation points based on the center of gravity of the pressure plate 300 and the lifting direction, ensuring that the pressure plate 300 is subjected to balanced forces and remains stable during lifting. A stable lifting state reduces the possibility of the pressure plate 300 colliding with other objects. Simultaneously, it facilitates the operator in precisely adjusting the pressure plate 300 to the position abutting against the end of the main shaft 100, and aligning the pressure plate 300 with the horizontally aligned through hole 310 on the pressure plate 300 and the threaded hole 210 on the expansion sleeve 200, improving installation efficiency and safety.

[0050] Combination Figure 3 and Figure 4 In some embodiments, the expansion sleeve 200 disassembly fixture further includes a positioning slider 500 and a locking member 600. The positioning slider 500 is slidably connected to one end of the pressure plate 300 near the main shaft 100 along the radial direction of the main shaft 100, and multiple positioning sliders 500 are arranged circumferentially around the main shaft 100. Multiple locking members 600 are correspondingly arranged to the positioning sliders 500, and the locking members 600 are used to lock the relative position of the corresponding positioning slider 500 and the pressure plate 300.

[0051] In this embodiment, the positioning sliders 500 are slidably connected to the pressure plate 300 radially along the main shaft 100, and multiple positioning sliders 500 are arranged circumferentially around the main shaft 100. By sliding the positioning sliders 500, their contact state with the main shaft 100 can be adjusted, so that multiple positioning sliders 500 can jointly conform to the outer wall of the main shaft 100. The locking member 600 can fix the position of the positioning sliders 500, preventing the positioning sliders 500 from moving during disassembly. The arrangement of the positioning sliders 500 further enhances the positioning accuracy between the pressure plate 300 and the main shaft 100, avoiding radial wobbling of the pressure plate 300 relative to the main shaft 100 when under force. The multiple positioning sliders 500 are distributed circumferentially, which can constrain the main shaft 100 from multiple directions, making the relative position of the pressure plate 300 and the main shaft 100 more stable, providing more reliable support for the disassembly process, and thus ensuring that the expansion sleeve 200 is subjected to uniform force and moves smoothly.

[0052] In some embodiments, the locking member 600 includes a positioning bolt threadedly connected to the positioning slider 500. The positioning bolt is configured to switch between a locked state and an unlocked state. In the locked state, the positioning bolt is connected to the pressure plate 300, and in the unlocked state, the positioning bolt is disengaged from the pressure plate 300.

[0053] In this embodiment, the positioning bolt is threadedly connected to the positioning slider 500. When the position of the positioning slider 500 needs to be adjusted, the positioning bolt is rotated to disengage it from the pressure plate 300 (unlocked state), at which point the positioning slider 500 can slide along the pressure plate 300. After the positioning slider 500 is adjusted to the appropriate position, the positioning bolt is rotated in the opposite direction to connect it to the pressure plate 300 (locked state), thereby fixing the positioning slider 500. This locking method is simple to operate, and the threaded transmission can precisely control the tightness between the positioning bolt and the pressure plate 300, ensuring that the positioning slider 500 will not loosen in the locked state and slides smoothly in the unlocked state. At the same time, the threaded connection has high reliability and can withstand the force exerted on the positioning slider 500 during disassembly, ensuring a long-lasting and stable positioning effect.

[0054] In some embodiments, the positioning slider 500 is provided with a threaded through hole 510 along the axial direction of the main shaft 100, and the positioning bolt is threadedly connected to the positioning slider 500 through the threaded through hole 510. In the locked state, the end of the positioning bolt facing the pressure plate 300 abuts against the pressure plate 300.

[0055] In this embodiment, after the positioning bolt passes through the threaded through hole 510 of the positioning slider 500, its end facing the pressure plate 300 abuts against the pressure plate 300 in the locked state. The pressure exerted by the positioning bolt on the pressure plate 300 generates frictional force, thereby fixing the relative position of the positioning slider 500 and the pressure plate 300. This structural design allows the force of the positioning bolt to act directly on the pressure plate 300, resulting in a shorter transmission path and more reliable locking effect. At the same time, the threaded through hole 510, which is axially arranged along the main shaft 100, facilitates the operator's operation of the positioning bolt, providing a larger operating space and making operation easier.

[0056] In some embodiments, a trapezoidal groove 340 is provided at one end of the pressure plate 300 near the main shaft 100, and a trapezoidal sliding part 520 is provided in the positioning slider 500. The trapezoidal sliding part 520 is slidably connected to the pressure plate 300 through the trapezoidal groove 340.

[0057] In this embodiment, the trapezoidal groove 340 of the pressure plate 300 and the trapezoidal sliding part 520 of the positioning slider 500 cooperate with each other. The trapezoidal structure has a guiding function, which can ensure that the positioning slider 500 slides accurately along the radial direction of the main shaft 100 and avoids deviation during the sliding process. At the same time, the inclined surfaces on both sides of the trapezoidal structure can prevent the positioning slider 500 from disengaging from the pressure plate 300 in the sliding or locked state, thereby enhancing the stability of the connection between the positioning slider 500 and the pressure plate 300. This sliding connection method can also distribute the force on the positioning slider 500, reduce local wear, and extend the service life of the tooling.

[0058] In some embodiments, the positioning slider 500 is provided with an arc-shaped surface 530 on the side near the spindle 100, and the arc-shaped surface 530 is used to contact the side wall of the spindle 100.

[0059] In this embodiment, the arc-shaped surface 530 of the positioning slider 500 near the spindle 100 is adapted to the outer side wall (cylindrical) of the spindle 100, which increases the contact area between the positioning slider 500 and the spindle 100. This increased contact area makes the constraint of the positioning slider 500 on the spindle 100 more stable, reduces the pressure per unit area, and avoids damage to the surface of the spindle 100 due to excessive local pressure. Simultaneously, the tight fit between the arc-shaped surface 530 and the surface of the spindle 100 effectively prevents radial rotation of the pressure plate 300 relative to the spindle 100, further improving the stability of the positioning of the pressure plate 300 and the spindle 100, and ensuring the smooth disassembly of the expansion sleeve 200.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A tooling for disassembling an expansion sleeve, characterized in that, The expansion sleeve removal tool is used to disassemble the expansion sleeve fitted on the spindle, and includes: A pressure plate having a through hole is provided, and the pressure plate is used to abut against the end of the spindle; The pressure rod assembly includes a pull rod and a pressure nut. The pull rod is provided with an external thread. One end of the pull rod is connected to the expansion sleeve, and the other end is slidably inserted through the through hole. The pressure nut is located on the side of the pressure plate away from the main shaft and is threadedly connected to the pull rod.

2. The expansion sleeve disassembly fixture according to claim 1, characterized in that, Multiple pressure rod assemblies are provided corresponding to the through holes. The multiple pressure rod assemblies are arranged circumferentially around the main shaft and are respectively connected to the expansion sleeve.

3. The expansion sleeve disassembly fixture according to claim 1, characterized in that, The pull rod is threadedly connected to the expansion sleeve through a threaded hole provided in the expansion sleeve.

4. The expansion sleeve disassembly fixture according to any one of claims 1 to 3, characterized in that, The pressure plate is provided with at least one first lifting screw hole for connecting the lifting lug at one end away from the main shaft; and / or, the side wall of the pressure plate is provided with at least one second lifting screw hole for connecting the lifting lug.

5. The expansion sleeve disassembly fixture according to claim 4, characterized in that, The pressure plate has a plurality of first lifting screw holes at one end opposite to the main shaft, and the plurality of first lifting screw holes are arranged in a rectangular or circular array along the end face of the pressure plate; and / or, The pressure plate has a plurality of second lifting screw holes on its side wall, and the plurality of second lifting screw holes are arranged circumferentially along the side wall of the pressure plate.

6. The expansion sleeve disassembly fixture according to any one of claims 1 to 3, characterized in that, Also includes: The positioning slider is slidably connected to one end of the pressure plate near the main shaft along the radial direction of the main shaft, and multiple positioning sliders are arranged around the main shaft in a circumferential direction. Multiple locking elements are provided corresponding to the positioning sliders, and the locking elements are used to lock the relative position of the corresponding positioning sliders and the pressure plate.

7. The expansion sleeve disassembly fixture according to claim 6, characterized in that, The locking element includes a positioning bolt that is threadedly connected to the positioning slider. The positioning bolt is configured to switch between a locked state and an unlocked state. In the locked state, the positioning bolt is connected to the pressure plate, and in the unlocked state, the positioning bolt is disengaged from the pressure plate.

8. The expansion sleeve disassembly fixture according to claim 7, characterized in that, The positioning slider is provided with a threaded through hole along the axis of the main shaft. The positioning bolt is threadedly connected to the positioning slider through the threaded through hole. In the locked state, the end of the positioning bolt facing the pressure plate abuts against the pressure plate.

9. The expansion sleeve disassembly fixture according to claim 7, characterized in that, The pressure plate is provided with a trapezoidal groove, and the positioning slider is provided with a trapezoidal sliding joint. The trapezoidal sliding joint is slidably connected to the pressure plate through the trapezoidal groove.

10. The expansion sleeve disassembly fixture according to claim 7, characterized in that, The positioning slider has an arc-shaped surface on the side closest to the main shaft.

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