Nut dismounting device

Abstract

The invention belongs to the technical field of nuclear power overhaul, and particularly relates to a nut dismounting and mounting device which comprises a mounting seat, a sleeve and a driving part, the sleeve and the driving part are mounted on the mounting seat, and the sleeve is rotationally mounted on the mounting seat and provided with a first nesting part for nesting a nut in a matched mode; the driving piece drives the sleeve to rotate to provide torque for screwing the nut, the driving piece drives the sleeve to rotate around the axis of the sleeve so as to drive the nut nested in the first nesting part to rotate, automatic unscrewing dismounting and tightening mounting of the nut can be achieved through the nut dismounting device, and the nut dismounting efficiency can be improved. The sleeve is further provided with a containing bin for containing the nut in a matched mode, a conveying assembly is arranged in the containing bin and comprises a conveying rod extending in the axial direction of the sleeve, and the conveying rod is used for allowing the nut to move in the axial direction of the sleeve so that the nut can move back and forth between the containing bin and the first nesting part. The nut can be contained in the containing bin, and the risk that the nut falls off and is lost can be reduced.

Description

Technical Field

[0001] This application belongs to the technical field of nuclear power plant maintenance, and more specifically, relates to a nut disassembling and assembling tool. Background Art

[0002] Nuclear power plants need to be regularly maintained. There are a large number of pneumatic valves in nuclear power plants, especially a large number of pneumatic control valves. Among them, the pneumatic head diaphragm box and the diaphragm of the pneumatic control valve are tightly sealed and connected by a large number of bolts and nuts. During maintenance, the nuts need to be disassembled one by one to open the diaphragm box for maintaining the internal structure. The number of nuts is numerous. Using manual tools such as wrenches for disassembly and assembly takes a long time, is cumbersome to operate, has low disassembly and assembly efficiency, and the nuts are very easy to be lost during the operation, affecting the normal progress of disassembly and assembly operations. Extra effort is also required to deal with the dropped and lost nuts, seriously affecting the maintenance efficiency and delaying the maintenance time. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a nut disassembling and assembling tool, aiming to improve the disassembly and assembly efficiency of nuts during maintenance and reduce the risk of nuts dropping and being lost during disassembly and assembly.

[0004] To achieve the above purpose, the technical solution adopted in this application is:

[0005] Provide a nut disassembling and assembling tool, including:

[0006] A mounting seat;

[0007] A sleeve, rotatably mounted on the mounting seat. One end of the sleeve is axially open and forms a first nesting portion for fitting and nesting nuts.

[0008] A driving member, mounted on the mounting seat and connected to the sleeve. The driving member is used to drive the sleeve to rotate self - to provide the torque for screwing the nut.

[0009] Among them, the sleeve has a receiving cavity that axially penetrates the first nesting portion and is used to fit and accommodate nuts. A transmission assembly is provided in the receiving cavity. The transmission assembly includes a transmission rod extending along the axial direction of the sleeve. One end of the transmission rod is located in the receiving cavity, and the opposite end extends to the lower part of the first nesting portion or extends into the first nesting portion. The transmission rod is used to allow the nut to move axially along the sleeve, so that the nut can move back and forth between the receiving cavity and the first nesting portion.

[0010] In some embodiments, the transmission rod is provided with an external thread adapted to the internal thread of the nut, and the external thread extends from the receiving cavity to the lower part of the first nesting portion or extends into the first nesting portion.

[0011] In some embodiments, the inner wall surface of the first nested portion has an annular abutting wall adapted to the shape of the nut. The annular abutting wall extends along the axial direction of the sleeve to one end of the accommodation chamber facing away from the first nested portion. The nut disassembling and assembling tool further includes a mounting cylinder mounted on the mounting seat and coaxially arranged with the sleeve. One end of the sleeve facing away from the first nested portion is rotatably inserted into the mounting cylinder, and the transmission rod can be switched between a first state and a second state relative to the mounting cylinder;

[0012] Wherein, when the transmission rod is in the first state, the transmission rod can rotate synchronously with the sleeve so that the nut is stationary relative to the transmission rod. When the transmission rod is in the second state, the transmission rod is stationary relative to the mounting cylinder so that the nut can move up and down along the transmission rod when the sleeve rotates.

[0013] In some embodiments, the transmission assembly further includes:

[0014] A connecting member, which is arranged in the sleeve and fixedly connected to the wall of the accommodation chamber. The end of the transmission rod facing away from the first nested portion is connected to the connecting member so that the transmission rod can rotate synchronously with the sleeve when in the first state; and

[0015] A limiting member, which is slidably mounted in the mounting cylinder along the axial direction of the mounting cylinder. The limiting member can slide between a first position and a second position. Wherein, when the limiting member is in the first position, the limiting member is connected to the transmission rod so that the transmission rod is switched to the second state to limit the transmission rod from rotating with the sleeve. When the limiting member is in the second position, the limiting member disengages from the transmission member so that the transmission rod is switched to the second state and can rotate with the sleeve.

[0016] In some embodiments, at least one of the side wall of the mounting cylinder and the outer peripheral wall of the limiting member is provided with a sliding groove, and at least the other of the side wall of the mounting cylinder and the outer peripheral wall of the limiting member is provided with a sliding block adapted to be snap-fitted with the sliding groove. The sliding groove is arranged parallel to the axial direction of the mounting cylinder;

[0017] Wherein, when the sliding block moves along the axial direction of the mounting cylinder to one end of the sliding groove facing the transmission rod, the limiting member is in the first position. When the sliding block moves along the axial direction of the mounting cylinder to the other end of the sliding groove facing away from the transmission rod, the limiting member is in the second position.

[0018] In some embodiments, the transmission assembly further includes a rotating member capable of rotating around its own axis along the axial direction of the mounting cylinder. The rotating member is mounted in the mounting cylinder and located on the side of the limiting member facing away from the transmission rod. A first magnetic member is provided on the rotating member, and a second magnetic member is provided on the limiting member;

[0019] Wherein, when the rotating member rotates by a preset angle, the first magnetic member and the second magnetic member are magnetically attracted to each other so that the limiting member slides from the first position to the second position. When the rotating member rotates by another preset angle, the first magnetic member and the second magnetic member are magnetically repelled from each other so that the limiting member slides from the second position to the first position.

[0020] In some embodiments, the first magnetic part includes a plurality of first permanent magnets evenly spaced along the circumference of the mounting tube, and the polarities of the ends of two adjacent first permanent magnets facing the limit member are opposite; the second magnetic part includes a plurality of second permanent magnets whose number is equal to the number of first permanent magnets, and the polarities of the ends of two adjacent second permanent magnets facing the rotation are opposite; and the plurality of second permanent magnets are arranged one-to-one correspondingly to the plurality of first permanent magnets along the axial direction of the mounting tube.

[0021] In some embodiments, the mounting tube is also rotatably connected to a first knob, the first knob is connected to the rotating member, and the first knob is used to drive the rotating member to rotate.

[0022] In some embodiments, a clamping structure is provided between the transmission rod and the limiting member, and when the limiting member is in the first position, the limiting member is clamped with the transmission rod through the clamping structure.

[0023] In some embodiments, the snap-fit ​​structure includes a snap-fitting slot and a snap-fitting block along the axial direction of the transmission rod, the end of the transmission rod away from the first nesting part protrudes from the connecting piece, the snap-fitting slot is arranged at the end of the transmission rod away from the first nesting part, the snap-fitting block is arranged on the limiting part, and / or the snap-fitting block is arranged at the end of the transmission rod away from the first nesting part, and the snap-fitting slot is arranged on the limiting part.

[0024] In some embodiments, the nut disassembler also includes an adjusting cylinder that can be adapted to be embedded in the first nesting portion. The adjusting cylinder is coaxially arranged with the sleeve and passes through the accommodating chamber. The end opening of the adjusting cylinder is away from the accommodating chamber and forms a second nesting portion for adapting to the nested nut. The second nesting portion and the first nesting portion are used to adapt to nuts with different outer diameters.

[0025] In some embodiments, the nut disassembler includes a plurality of adjustment barrels, each of which has a second nesting portion with a different inner size for adapting to nuts with different outer diameters.

[0026] In some embodiments, the driving member includes a motor and a synchronous belt. The motor is mounted on a mounting seat. The outer wall of the sleeve is sleeved with a first gear. One end of the synchronous belt is wound around the output shaft of the motor, and the other end of the synchronous belt is wound around the first gear.

[0027] In some embodiments, a second gear is sleeved on the output shaft of the motor, and a synchronous belt is wrapped around the second gear. The free end of the output shaft of the motor is rotatably connected to a second knob, and the end face of the second knob facing the second gear abuts against the wheel surface of the second gear. The second knob can rotate relative to the output shaft of the motor to squeeze the second gear, thereby adjusting the rotation speed of the second gear.

[0028] The beneficial effects of the nut disassembly and assembly tool provided by this application are as follows: When using it to disassemble a nut, move the sleeve so that the first nesting part is nested and connected with the nut to be removed. Then, start the driving part to provide a loosening torque. The driving part drives the sleeve to rotate around its own axis. While the sleeve rotates, it can drive the nut nested in the first nesting part to rotate, so as to loosen the nut until it is removed. The removed nut is nested in the first nesting part, and then move the sleeve to make the nut move along the transmission rod in the sleeve into the storage bin; conversely, when using it to install a nut, the nut to be installed can be first placed in the storage bin. After aligning the first nesting part with the corresponding installation position, move the sleeve to make the nut move along the transmission rod in the sleeve to the first nesting part. Then, start the driving part to provide a tightening torque. The driving part drives the sleeve to rotate around its own axis, so as to drive the nut nested in the first nesting part to rotate, thereby tightening the nut. After tightening the nut, move the sleeve to separate the first nesting part from the nut. In this way, using this nut disassembly and assembly tool can realize the automatic loosening, disassembly, tightening and installation of nuts. The nut disassembly and assembly operation has a high degree of mechanization and automation, which can effectively reduce the labor intensity of operators and improve work efficiency; moreover, during the process of installing nuts, the tightening torque applied to the nuts can also be controlled by controlling the power output of the driving part. Set the torque output of the rotating driving part before operation to match the torque required for tightening the nut, which can also reduce the situation of damaging the nut due to excessive torque or the nut not being tightened in place due to too small torque; in addition, before and after disassembling and assembling the nut, the nut can be housed in the storage bin, which can also effectively reduce the risk of the nut falling and being lost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the nut disassembly and assembly tool provided by the embodiment of this application;

[0031] Figure 2 is Figure 1 A cross-sectional view of the nut disassembly and assembly tool shown when the transmission rod is in the first state;

[0032] Figure 3 is Figure 1 A cross-sectional view of the nut disassembly and assembly tool shown when the transmission rod is in the second state;

[0033] Figure 4 is Figure 2 An enlarged view of part A in

[0034] Figure 5 is Figure 3 The enlarged view at position B in

[0035] Figure 6 is Figure 1 the structural decomposition schematic diagram of the nut disassembling and assembling tool shown in

[0036] Figure 7 is Figure 1 the partial structural decomposition schematic diagram of the transmission component of the nut disassembling and assembling tool shown in

[0037] Figure 8 is Figure 1 the structural schematic diagram when the first nested part of the sleeve of the nut disassembling and assembling tool is provided with an adjusting cylinder as shown in

[0038] Among them, the reference numerals in the figure are as follows:

[0039] 10. Mounting base; 11. Positioning cylinder; 12. Support base; 121. Bottom shell; 122. Upper cover;

[0040] 20. Sleeve; 21. First nested part; 211. Annular abutting wall; 22. Accommodating chamber; 23. First gear;

[0041] 30. Driving part; 31. Motor; 311. Output shaft; 312. Second gear; 313. Second knob; 32. Timing belt;

[0042] 40. Transmission component; 401. Clamping structure; 41. Transmission rod; 411. External thread; 412. Card slot; 42. Connecting piece; 43. Limiting piece; 431. Second magnetic part; 4311. Second permanent magnet; 432. Slide block; 433. Clamping block; 44. Rotating part; 441. First magnetic part; 4411. First permanent magnet;

[0043] 50. Mounting cylinder; 52. First knob;

[0044] 60. Adjusting cylinder; 61. Second nested part;

[0045] 70. Battery compartment. Detailed implementation manners

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer and more understandable, the following further details this application in combination with the attached Figures 1 to 8 drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0049] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, the meaning of "multiple groups" is two or more groups, the meaning of "multiple pieces" is two or more pieces, and the meaning of "several" is one or more, unless otherwise specifically defined.

[0050] Nuclear power plants need to be regularly maintained. There are a large number of pneumatic valves in nuclear power plants, especially a large number of pneumatic control valves. Among them, the pneumatic head diaphragm box and the diaphragm of the pneumatic control valve are tightly sealed and connected by a large number of bolts and nuts. During maintenance, the nuts need to be disassembled one by one to open the diaphragm box for inspecting the internal structure. The number of nuts is large, and it takes a long time, is cumbersome to operate, and has low disassembly and assembly efficiency when using manual tools such as wrenches. Moreover, the nuts are very easy to lose during the operation, affecting the normal progress of the disassembly and assembly operation, and additional energy is required to deal with the dropped and lost nuts, seriously affecting the maintenance efficiency and delaying the maintenance time.

[0051] Based on this, the embodiment of the present application provides a nut disassembling and assembling tool to solve the above problems.

[0052] Please refer to Figures 1 to 8 , the nut disassembling and assembling tool provided by the embodiment of the present application is applicable but not limited to disassembling and assembling the nuts connected to various equipment and devices during the maintenance of nuclear power plant equipment, such as disassembling and assembling the nuts connecting the pneumatic head diaphragm box and the diaphragm of the pneumatic control valve. In the embodiment of the present application, the axial direction of the sleeve is the direction indicated by the arrow F1 in the figure. Among them, the axial directions of the transmission rod and the mounting cylinder are the same as the axial direction of the sleeve, and the self-rotation direction of the sleeve is the direction indicated by the arrow F2 in the figure.

[0053] In an embodiment of the present application, as Figures 1 to 4 shown, the nut disassembling and assembling tool includes a mounting base 10, a sleeve 20, and a driving member 30. The sleeve 20 is rotatably mounted on the mounting base 10. One end of the sleeve 20 is axially open and forms a first nesting portion 21 for fitting and nesting a nut. The driving member 30 is mounted on the mounting base 10 and connected to the sleeve 20. The driving member 30 is configured to drive the sleeve 20 to rotate about its own axis to provide a torque for screwing the nut. Wherein, the sleeve 20 has a receiving cavity 22 that axially penetrates the first nesting portion 21 and is used for fitting and accommodating the nut. A transmission assembly 40 is provided in the receiving cavity 22. The transmission assembly 40 includes a transmission rod 41 extending along the axial direction of the sleeve 20. One end of the transmission rod 41 is disposed in the receiving cavity 22, and the opposite end extends to the lower part of the first nesting portion 21 or extends into the first nesting portion 21. The transmission rod 41 is configured to allow the nut to move axially along the sleeve 20, so that the nut can move back and forth between the receiving cavity 22 and the first nesting portion 21.

[0054] When using the nut disassembling and assembling tool of the embodiment of the present application to disassemble a nut, that is, when it is necessary to loosen and remove the nut at the corresponding position, the sleeve 20 is moved so that the first nesting portion 21 is nested and connected to the nut to be removed. Subsequently, the driving member 30 is started to provide a loosening torque. The driving member 30 drives the sleeve 20 to rotate about its own axis in the direction shown by the arrow F2. While the sleeve 20 rotates, it can drive the nut nested in the first nesting portion 21 to rotate, so as to loosen the nut until it is removed. The removed nut is nested in the first nesting portion 21. Subsequently, the sleeve 20 is moved again to make the nut move along the transmission rod 41 in the sleeve 20 into the receiving cavity 22. On the contrary, when using it to install a nut, that is, when it is necessary to install the nut at the corresponding position, the nut to be installed can be first placed in the receiving cavity 22. After aligning the first nesting portion 21 with the corresponding installation position, the sleeve 20 is moved to make the nut move along the transmission rod 41 in the sleeve 20 to the first nesting portion 21. Subsequently, the driving member 30 is started to provide a tightening torque. The driving member 30 drives the sleeve 20 to rotate about its own axis in the direction opposite to the direction shown by the arrow F2, so as to drive the nut nested in the first nesting portion 21 to rotate, thereby tightening the nut. After tightening the nut, the sleeve 20 is moved to disengage the first nesting portion 21 from the nut.

[0055] Thus, using this nut disassembly and assembly tool can achieve the automatic loosening and disassembly as well as tightening and installation of nuts. The mechanization and automation levels of nut disassembly and assembly operations are high, which can effectively reduce the labor intensity of operators and improve work efficiency. Moreover, during the process of installing nuts, the tightening torque applied to the nuts can also be controlled by controlling the power output of the driving member 30. Set the torque output of the rotary driving member 30 before operation to match the torque required for nut tightening, which can also reduce the situation of damaging the nut due to excessive torque or the nut not being tightened in place due to insufficient torque. In addition, before and after disassembling and assembling the nuts, the nuts can be housed in the housing bin, and the housing bin houses the nuts, thereby effectively reducing the risk of the nuts falling and being lost.

[0056] In the embodiment of the present application, it can be understood that, as Figure 1 and Figure 2 shown, the first nesting portion 21 is a groove recessed in the open end of the sleeve 20 and capable of fitting and accommodating the nut, and the inner wall surface of the groove has an annular abutting wall 211 adapted to the shape of the nut. For example, when the nut to be disassembled and assembled is a hexagonal nut, the annular abutting wall 211 has six abutting walls corresponding to the six side walls of the nut. When the nut to be disassembled and assembled is a nut of other shapes, the annular abutting wall 211 has a number of abutting walls corresponding to the number of side walls of the nut of that shape. Thus, when the nut is nested in the first nesting portion 21, the outer wall surface of the nut is in contact with the annular abutting wall 211. When the sleeve 20 rotates, the nut abuts against the annular abutting wall 211 and can rotate together with the sleeve 20.

[0057] It can be understood that in this embodiment, the driving member 30 can be a rotary driving member 30 including a servo motor 31, etc. The output shaft 311 of the driving member 30 can rotate forward and backward. When rotating forward, it can provide the power to loosen the nut, and when rotating backward, it can provide the power to tighten the nut. Moreover, during use, according to the torque required for nut tightening, the automatic control of the screwing torque of the nut can also be achieved by setting the rotation speed of the servo motor 31, etc., so as to provide an appropriate torque to screw the nut.

[0058] In some embodiments, as Figure 1 、 Figure 2 and Figure 6As shown, the driving member 30 includes a motor 31 and a synchronous belt 32. The motor 31 is installed on the mounting base 10. A first gear 23 is sleeved on the outer wall of the sleeve 20. One end of the synchronous belt 32 is wound around the output shaft 311 of the motor 31, and the other end of the synchronous belt 32 is wound around the first gear 23. In this way, when the motor 31 is started, the output shaft 311 of the motor 31 rotates and then drives the first gear 23 to rotate through the synchronous belt 32. The rotation of the first gear 23 drives the sleeve 20 to rotate around its own axis, thereby driving the nut nested in the first nesting portion 21 to rotate synchronously. The rotation driving structure of the sleeve 20 is simple and compact, and is flexible and convenient to use.

[0059] In some embodiments, such as Figure 2 , Figure 3 and Figure 6 as shown, the transmission rod 41 is provided with an external thread 411 adapted to the internal thread of the nut. The external thread 411 extends from the accommodation chamber 22 to the lower part of the first nesting portion 21 or extends into the first nesting portion 21.

[0060] In this embodiment, by providing the external thread 411 on the outer peripheral wall of the transmission rod 41, and the external thread 411 is adapted to the internal thread of the nut, the nut can move axially along the transmission rod 41 through thread cooperation. For example, the nut can rotate along the transmission rod 41 under the action of its own gravity and move axially along the sleeve 20, or the nut can also rotate along the transmission rod 41 under the action of an external driving force and move axially along the sleeve 20.

[0061] In this embodiment, such as Figure 2 , Figure 3 and Figure 6 as shown, the external thread 411 of the transmission rod 41 extends from the accommodation chamber 22, that is, the starting position of the external thread 411 is in the accommodation chamber 22, and there are two possible extension situations. One is to extend to the lower part of the first nesting portion 21, which means that the external thread 411 starts from the accommodation chamber 22 and extends all the way to the position below the first nesting portion 21, and there may be a certain distance from the first nesting portion 21 or reach the bottom edge of the first nesting portion 21; the other situation is to extend into the first nesting portion 21, that is, the external thread 411 extends from the accommodation chamber 22 into the internal space of the first nesting portion 21. In this way, the nut placed in the accommodation chamber 22 can move from the accommodation chamber 22 as a starting point to be embedded in the first nesting portion 21, and the removed nut can move out of the first nesting portion 21 and be transmitted to the accommodation chamber 22 through the transmission rod 41.

[0062] In some embodiments, such as Figures 1 to 5As shown, the inner wall surface of the first nested portion 21 has an annular abutting wall 211 adapted to the shape of the nut. The annular abutting wall 211 extends along the axial direction of the sleeve 20 to one end of the accommodation bin 22 away from the first nested portion 21. The nut disassembling and assembling tool further includes a mounting cylinder 50 mounted on the mounting seat 10 and coaxially arranged with the sleeve 20. One end of the sleeve 20 away from the first nested portion 21 is rotatably inserted into the mounting cylinder 50. The transmission rod 41 can be switched between a first state and a second state relative to the mounting cylinder 50. When the transmission rod 41 is in the first state, the transmission rod 41 can rotate synchronously with the sleeve 20 so that the nut is stationary relative to the transmission rod 41. When the transmission rod 41 is in the second state, the transmission rod 41 is stationary relative to the mounting cylinder 50 so that the nut can move up and down along the transmission rod 41 when the sleeve 20 rotates.

[0063] In this embodiment, the inner wall surface of the first nested portion 21 forms an annular abutting wall 211. The annular abutting wall 211 extends along the axial direction of the sleeve 20 to one end of the accommodation bin 22 away from the first nested portion 21, so that the nut can be in close contact with the annular abutting wall 211, thereby playing a limiting role on the nut and enabling the sleeve 20 to always drive the nut to rotate synchronously during the self-rotation process.

[0064] Furthermore, a mounting cylinder 50 is provided on the mounting seat 10. One end of the sleeve 20 away from the first nested portion 21 is rotatably inserted into the mounting cylinder 50, that is, one end of the sleeve 20 can rotate in the mounting cylinder 50. The mounting cylinder 50 provides rotational support and guidance for the rotation of the sleeve 20, enabling the sleeve 20 to stably rotate around the axis shared with the mounting cylinder 50.

[0065] Moreover, the transmission rod 41 can also be switched between a first state and a second state relative to the mounting cylinder 50. When the transmission rod 41 is in the first state, as Figure 2 and Figure 4 shown, the transmission rod 41 can rotate synchronously with the sleeve 20, that is, when the transmission rod 41 is in the first state, there is a certain connection or transmission mechanism between the transmission rod 41 and the sleeve 20, enabling the rotation of the sleeve 20 to drive the transmission rod 41 to rotate together. At this time, since the transmission rod 41 rotates synchronously with the sleeve 20, the nut is limited within the first nested portion 21 and remains relatively stationary with respect to the transmission rod 41. In this way, the nut will not move axially as the transmission rod 41 rotates, enabling the nut to be stably and reliably positioned within the first nested portion 21, thereby providing guarantee for tightening or loosening the nut. When the transmission rod 41 is in the second state, as Figure 3 and Figure 5As shown, the transmission rod 41 is stationary relative to the mounting cylinder 50. When the sleeve 20 rotates, the nut is restricted by the annular abutting wall 211 to rotate synchronously with the sleeve 20. During the rotation of the nut, since the nut is also threadedly engaged with the transmission rod 41, the nut can move up and down along the transmission rod 41 under the drive of the sleeve 20, so that the nut can move into the receiving cavity 22 for accommodation, or move out of the receiving cavity 22 to reach the first nesting portion 21.

[0066] In some embodiments, as Figures 2 to 6 shown, the transmission assembly 40 further includes a connecting member 42 and a limiting member 43. Among them, the connecting member 42 is disposed inside the sleeve 20 and fixedly connected to the wall of the receiving cavity 22. The end of the transmission rod 41 facing away from the first nesting portion 21 is connected to the connecting member 42, so that the transmission rod 41 can rotate synchronously with the sleeve 20 when in the first state; the limiting member 43 is slidably mounted inside the mounting cylinder 50 along the axial direction of the mounting cylinder 50, and the limiting member 43 can slide between a first position and a second position. Among them, when the limiting member 43 is in the first position, the limiting member 43 is connected to the transmission rod 41, so that the transmission rod 41 is switched to the second state to limit the transmission rod 41 from rotating with the sleeve 20. When the limiting member 43 is in the second position, the limiting member 43 disengages from the transmission member, so that the transmission rod 41 is switched to the first state and can rotate with the sleeve 20.

[0067] In this embodiment, the connecting member 42 in the transmission assembly 40 is disposed inside the sleeve 20 and fixedly connected to the wall of the receiving cavity 22. The end of the transmission rod 41 facing away from the first nesting portion 21 is connected to the connecting member 42. In this way, when the transmission rod 41 is in the first state, it can be connected to the sleeve 20 through the connecting member 42, so as to achieve synchronous rotation with the sleeve 20, that is, when the sleeve 20 rotates, the sleeve 20 can also drive the transmission rod 41 to rotate together through the connecting member 42.

[0068] Furthermore, the transmission assembly 40 further includes a limiting member 43. The limiting member 43 is slidably mounted inside the mounting cylinder 50 along the axial direction of the mounting cylinder 50, that is, the limiting member 43 can only slide axially inside the mounting cylinder 50 and switch to different positions. Among them, when the limiting member 43 is in the first position, the limiting member 43 is connected to the transmission rod 41. At this time, the limiting member 43 can prevent the transmission rod 41 from rotating with the sleeve 20, so that the transmission rod 41 is stationary relative to the mounting cylinder 50, that is, the transmission rod 41 is switched to the second state, thereby restricting the transmission rod 41 from rotating with the sleeve 20, so that the nut can move up and down along the transmission rod 41 when the sleeve 20 rotates. When the limiting member 43 is in the second position, the limiting member 43 disengages from the transmission rod 41. At this time, the transmission rod 41 is no longer restricted by the limiting member 43 and can rotate synchronously with the sleeve 20 under the drive of the connecting member 42, that is, the transmission rod 41 is switched to the first state to facilitate operations such as disassembling and assembling the nut.

[0069] In some embodiments, such as Figures 4 to 7 As shown, at least one of the side wall of the mounting cylinder 50 and the outer peripheral wall of the limiting member 43 is provided with a sliding groove, and at least the other of the side wall of the mounting cylinder 50 and the outer peripheral wall of the limiting member 43 is provided with a sliding block 432 that is adaptively clamped with the sliding groove. The sliding groove is arranged parallel to the axial direction of the mounting cylinder 50. Wherein, when the sliding block 432 moves along the axial direction of the mounting cylinder 50 to one end of the sliding groove facing the transmission rod 41, the limiting member 43 is in the first position, and when the sliding block 432 moves along the axial direction of the mounting cylinder 50 to the end of the sliding groove away from the transmission rod 41, the limiting member 43 is in the second position.

[0070] In this embodiment, a sliding groove and a sliding block 432 are arranged between the side wall of the mounting cylinder 50 and the outer peripheral wall of the limiting member 43 to slidably cooperate, so as to guide the sliding of the limiting member 43, thereby guiding the limiting member 43 to move from the first position to the second position.

[0071] In some embodiments, the number of sliding grooves is multiple, and the multiple sliding grooves are arranged at intervals along the circumferential direction of the mounting cylinder 50. The number of sliding blocks 432 is multiple, and the sliding blocks 432 are arranged at intervals along the circumferential direction of the mounting cylinder 50. Each sliding block 432 is correspondingly snapped into each sliding groove.

[0072] In this embodiment, multiple groups of sliding grooves and sliding blocks 432 are arranged between the limiting member 43 and the mounting cylinder 50 to cooperate with each other, so as to provide support and guidance for the limiting member 43 at multiple positions, reduce the risk of the limiting member 43 tilting or shaking during the sliding process, and thus improve the sliding stability and accuracy of the limiting member 43 in the mounting cylinder 50.

[0073] In a specific embodiment, the multiple sliding grooves are arranged at equal intervals along the circumferential direction of the mounting cylinder 50. Correspondingly, the multiple sliding blocks 432 are arranged at equal intervals along the circumferential direction of the limiting member 43.

[0074] In some embodiments, such as Figures 4 to 7 As shown, the transmission assembly 40 further includes a rotating member 44 that can rotate axially around the mounting cylinder 50. The rotating member 44 is installed in the mounting cylinder 50 and is located on the side of the limiting member 43 away from the transmission rod 41. A first magnetic member 441 is provided on the rotating member 44, and a second magnetic member 431 is provided on the limiting member 43. Wherein, when the rotating member 44 rotates by a preset angle, the first magnetic member 441 and the second magnetic member 431 are magnetically attracted to each other, so that the limiting member 43 slides from the first position to the second position. When the rotating member 44 rotates by another preset angle, the first magnetic member 441 and the second magnetic member 431 are magnetically repelled from each other, so that the limiting member 43 slides from the second position to the first position.

[0075] Wherein, when the rotating member 44 rotates by a preset angle, the first magnetic member 441 and the second magnetic member 431 are magnetically attracted to each other, thereby applying a force towards the rotating member 44 to the limiting member 43, causing the limiting member 43 to slide towards the rotating member 44, so that the limiting member 43 slides from the first position to the second position and can be maintained at the second position under the action of the magnetic attraction force, thereby separating the limiting member 43 from the transmission rod 41 and switching the transmission rod 41 to the first state in which it can rotate with the sleeve 20. When the rotating member 44 rotates by another preset angle, the first magnetic member 441 and the second magnetic member 431 are magnetically repelled, and a force away from the rotating member 44 is applied to the limiting member 43, prompting it to slide from the second position to the first position and can be maintained at the first position under the action of the magnetic repulsion force, connecting the limiting member 43 to the transmission rod 41, thereby switching the transmission rod 41 to the second state of being stationary relative to the mounting cylinder 50, restricting the transmission rod 41 from rotating with the sleeve 20, and further realizing the function of the nut moving up and down along the transmission rod 41 when the sleeve 20 rotates.

[0076] It can be understood that in a specific embodiment, the above preset angle can be determined according to the positional relationship between the first magnetic member 441 and the second magnetic member 431, so that the first magnetic member 441 can be magnetically attracted to the second magnetic member 431 at a certain position and magnetically repelled from the second magnetic member 431 at a certain other position. The embodiments of the present application do not specifically limit the preset angle, and it can be designed according to the actual situation during design.

[0077] In some embodiments, as Figure 6 and Figure 7 shown, the first magnetic member 441 includes a plurality of first permanent magnets 4411 evenly spaced along the circumferential direction of the mounting cylinder 50, and the polarities of the ends of adjacent two first permanent magnets 4411 facing the limiting member 43 are opposite. The second magnetic member 431 includes a plurality of second permanent magnets 4311 with the same number as the first permanent magnets 4411, and the polarities of the ends of adjacent two second permanent magnets 4311 facing the rotating member 44 are opposite. Along the axial direction of the mounting cylinder 50, the plurality of second permanent magnets 4311 are arranged in one-to-one correspondence with the plurality of first permanent magnets 4411.

[0078] In this embodiment, the first magnetic member 441 is composed of a plurality of first permanent magnets 4411, and these first permanent magnets 4411 are evenly spaced along the circumferential direction of the mounting cylinder 50, so as to form a uniformly distributed magnetic field in the circumferential direction of the mounting cylinder 50, providing a stable and balanced magnetic field environment for the interaction with the second magnetic member 431. Correspondingly, the second magnetic member 431 also includes a plurality of second permanent magnets 4311, the number of which is equal to the number of the first permanent magnets 4411, and along the axial direction of the mounting cylinder 50, the plurality of second permanent magnets 4311 are arranged in one-to-one correspondence with the plurality of first permanent magnets 4411, so that the magnetic force between the first magnetic member 441 and the second magnetic member 431 can be accurately transmitted, enabling each first permanent magnet 4411 to interact with the corresponding second permanent magnet 4311, thereby enhancing the stability and reliability of the entire magnetic control structure.

[0079] On this basis, the polarities of the ends of two adjacent first permanent magnets 4411 facing the limiting member 43 are opposite, and the polarities of the ends of two adjacent second permanent magnets 4311 facing the rotating member 44 are opposite. This setting enables the second permanent magnet 4311 to generate magnetic forces in different directions when interacting with the first permanent magnet 4411, so as to attract or repel the limiting member 43 according to the rotation angle of the rotating member 44, and further control the sliding of the limiting member 43 between the first position and the second position.

[0080] Exemplarily, when the rotating member 44 rotates to the N(S) pole of each first permanent magnet 4411 facing the N(S) pole of each second permanent magnet 4311, the first permanent magnet 4411 repels the second permanent magnet 4311, thereby pushing the limiting member 43 to move from the second position to the first position and keeping the limiting member 43 at the first position under the action of this repulsive force; conversely, when the rotating member 44 rotates to the S(N) pole of each first permanent magnet 4411 facing the N(S) pole of each second permanent magnet 4311, the first permanent magnet 4411 attracts the second permanent magnet 4311, thereby attracting the limiting member 43 to move from the first position to the second position and keeping the limiting member 43 at the first position under the action of this attractive force.

[0081] In some embodiments, such as Figure 1 and Figures 4 to 6 shown, the mounting cylinder 50 is also rotatably connected with a first knob 52, the first knob 52 is connected with the rotating member 44, and the first knob 52 is used to drive the rotating member 44 to rotate self. That is, the first knob 52 is rotatably connected to the mounting cylinder 50, and the rotating member 44 is controlled to rotate by rotating the first knob 52. The rotation driving structure of the rotating member 44 is simple, and the operability of the rotation operation is strong.

[0082] In some embodiments, a clamping structure 401 is provided between the transmission rod 41 and the limiting member 43 . When the limiting member 43 is in the first position, the limiting member 43 is clamped with the transmission rod 41 through the clamping structure 401 .

[0083] That is, when the limit member 43 is in the first position, it is engaged with the transmission rod 41 through the engaging structure 401, thereby limiting the rotation of the transmission rod 41, so that the transmission rod 41 is in the second state and is stationary relative to the mounting tube 50; and when the limit member 43 is in the second position, the limit member 43 is separated from the transmission member, and the transmission member is no longer restricted by the limit member 43, but can rotate synchronously with the sleeve 20 under the transmission action of the connecting member 42, even if the transmission member is in the first state.

[0084] It can be understood that the snap-fit ​​structure 401 can be the cooperation between a protrusion and a groove, or the engagement between a buckle and a slot, etc.

[0085] In a specific embodiment, Figures 4 to 7 As shown, the snap-fit ​​structure 401 includes a snap-fitting groove 412 and a snap-fitting block 433 along the axial snap-fitting of the transmission rod 41, the end of the transmission rod 41 away from the first nesting portion 21 protrudes from the connecting member 42, the snap-fitting groove 412 is arranged at the end of the transmission rod 41 away from the first nesting portion 21, the snap-fitting block 433 is arranged on the limiting member 43, and / or, the snap-fitting block 433 is arranged at the end of the transmission rod 41 away from the first nesting portion 21, and the snap-fitting groove 412 is arranged on the limiting member 43.

[0086] In this embodiment, the snap-fit ​​structure 401 is composed of a snap-fitting groove 412 and a snap-fitting block 433. The snap-fitting groove 412 is arranged at the end of the transmission rod 41 away from the first nesting portion 21, and the snap-fitting block 433 is arranged on the limiting member 43. Alternatively, the snap-fitting block 433 is arranged at the end of the transmission rod 41 away from the first nesting portion 21, and the snap-fitting groove 412 is arranged on the limiting member 43, thereby realizing the snap-fitting of the snap-fitting groove 412 and the snap-fitting block 433 along the axial direction of the transmission rod 41.

[0087] When the limiting member 43 is in the first position, Figure 5 As shown, due to the engagement between the card slot 412 and the card block 433, the transmission rod 41 and the stopper 43 are firmly connected together, thereby limiting the rotation of the transmission rod 41 relative to the stopper 43 and the mounting cylinder 50. When the stopper 43 is in the second position, as shown in FIG. Figure 4 As shown, the block 433 is disengaged from the slot 412 , and the limiting member 43 is separated from the transmission rod 41 , thereby releasing the restriction on the transmission rod 41 , so that the transmission rod 41 can rotate with the sleeve 20 .

[0088] In some embodiments, the nut disassembling and assembling tool further includes an adjusting cylinder 60 that can be adaptively embedded in the first nesting portion 21. The adjusting cylinder 60 is coaxially arranged with the sleeve 20 and penetrates through the accommodating chamber 22. The end of the adjusting cylinder 60 facing away from the accommodating chamber 22 is open and forms a second nesting portion 61 for adaptively nesting nuts. The second nesting portion 61 and the first nesting portion 21 are used to adapt to nuts with different outer diameters.

[0089] In some embodiments, as Figure 1 , Figure 2 and Figure 6 shown, the mounting base 10 includes a positioning cylinder 11 and a support base 12. The support base 12 is connected to the positioning cylinder 11. The motor 31 is installed at one end of the support base 12 facing away from the positioning cylinder 11. The synchronous belt 32 is received in the support base 12. A part of the sleeve 20 is sleeved in the positioning cylinder 11, and the first nesting portion 21 extends out from the positioning cylinder 11. Specifically, the first gear 23 is installed outside the sleeve 20, that is, at one end of the support base 12. The motor 31 is installed at the other end of the support base 12. The motor 31 and the second gear 312 are arranged offset in the horizontal direction and do not interfere with each other. Moreover, the synchronous belt 32 is received in the support base 12, and the support base 12 can protect the synchronous belt 32.

[0090] In a specific embodiment, the support base 12 includes a bottom shell and an upper cover that are buckled and connected to each other along the axial direction of the sleeve 20. The bottom shell and the upper cover enclose a cavity, and the synchronous belt 32 is installed in this cavity.

[0091] In some embodiments, as Figure 1 , Figure 2 and Figure 6 shown, a second gear 312 is sleeved on the output shaft 311 of the motor 31. The synchronous belt 32 is wound around the second gear 312. A second knob 313 is rotatably connected to the output shaft 311 of the motor 31. Exemplarily, the free end of the output shaft 311 of the motor 31 protrudes from the outer surface of the support base 12 and is rotatably connected to the second knob 313. The end face of the second knob 313 facing the second gear 312 abuts against the tooth surface of the second gear 312. The second knob 313 can rotate relative to the output shaft 311 of the motor 31 to squeeze the second gear 312, thereby adjusting the rotation speed of the second gear 312.

[0092] In this embodiment, the second gear 312 is sleeved on the output shaft 311 of the motor 31, and the synchronous belt 32 is wound around the second gear 312. The rotation of the output shaft 311 of the motor 31 drives the second gear 312 to rotate and then is transmitted to the first gear 23 through the synchronous belt 32. On the one hand, by replacing different second gears 312, the screwing torque of the nut can be adjusted, so as to provide an appropriate torque to screw the nut.

[0093] On this basis, the free end of the output shaft 311 of the motor 31 protrudes from the outer surface of the support seat 12 and is rotatably connected with a second knob 313. That is, the output shaft 311 of the motor 31 passes through the support seat 12, and the second knob 313 is rotatably installed at the end of the output shaft 311 passing through the support seat 12, enabling the operator to apply force to rotate the second knob 313 relative to the output shaft 311. Along the axial direction of the output shaft 311, since the second knob 313 abuts against the tooth surface of the second gear 312, rotating the second knob 313 will exert a pressure on the second gear 312, and this pressure will generate acting forces such as frictional force. According to the relationship between frictional force and rotation, when the frictional force changes, it will affect the rotation state of the second gear 312, thereby adjusting the rotation speed of the second gear 312. For example, rotating the second knob 313 closer to the second gear 312 will increase the extrusion force of the second knob 313 on the second gear 312, resulting in an increase in frictional force and a decrease in the rotation speed of the second gear 312; conversely, rotating the second knob 313 away from the second gear 312 will reduce the extrusion force of the second knob 313 on the second gear 312, the frictional force will decrease accordingly, and the rotation speed of the second gear 312 will increase accordingly. In this way, the adjustment of the screwing torque of the nut can be achieved by rotating the second knob 313, so as to provide an appropriate torque to screw the nut.

[0094] In some embodiments, such as Figure 1 、 Figure 2 and Figure 6 shown, the positioning cylinder 11 and / or the support seat 12 are further provided with a battery compartment 70, and a battery is accommodated in the battery compartment 70, and the battery is electrically connected to the motor 31. That is, the battery compartment 70 is provided in the positioning cylinder 11, or the battery compartment 70 is provided in the support seat 12, or a part of the battery compartment 70 is provided in the positioning cylinder 11 and a part is provided in the support seat 12. A battery is provided in the battery compartment 70, and the battery is electrically connected to the motor 31 to supply power to the motor 31.

[0095] In some other embodiments, different from the above embodiments, the motor 31 can also be provided with a power cord for electrically connecting with an external power supply. That is, the motor 31 is electrically connected to an external power supply through the power cord, and the external power supply supplies power to the motor 31.

[0096] In this embodiment, such as Figure 8As shown, the adjusting cylinder 60 can be adaptively embedded in the first nested part 21, and the open end of the adjusting cylinder 60 also has a second nested part 61. The second nested part 61 can be used for the nut to be embedded, and the outer diameter of the nut adapted to the second nested part 61 is different from the outer diameter of the nut adapted to the first nested part 21. In this way, by sleeving the adjusting cylinder 60, the nut dismounting tool can be used to disassemble and assemble nuts with different outer diameters, so that the nut dismounting tool of the present application can meet the disassembly and assembly requirements of a variety of nuts with different outer diameters, without separately designing a disassembly and assembly tool for each nut of different sizes, and the nut dismounting tool has good versatility and flexibility.

[0097] Exemplarily, when the first nested part 21 can be used for disassembling and assembling an M20 nut, the second nested part 61 of the adjusting cylinder 60 can be used for disassembling and assembling nuts other than the M20 nut. For example, it can be used for disassembling and assembling nuts such as M6, M8, M10, M12, or M16.

[0098] In some embodiments, the nut dismounting tool includes a plurality of adjusting cylinders 60, and each adjusting cylinder 60 has a second nested part 61 with different internal dimensions for adapting to nuts with different outer diameters.

[0099] Exemplarily, when the first nested part 21 can be used for disassembling and assembling an M20 nut, the plurality of adjusting cylinders 60 can be respectively used for disassembling and assembling any one of the nuts such as M6, M8, M10, M12, or M16.

[0100] In this embodiment, it can be understood that as Figure 8 shown, the second nested part 61 is a groove recessed in the open end of the adjusting cylinder 60 and can adaptively accommodate the nut, and the inner wall surface of the groove has an annular abutting wall adapted to the shape of the nut. For example, when the nut to be disassembled and assembled is a hexagonal nut, the second nested part 61 has six abutting walls corresponding to the six side walls of the nut. When the nut to be disassembled and assembled is a nut of other shapes, the second nested part 61 has a number of abutting walls corresponding to the number of side walls of the nut of that shape; thus, when the nut is nested in the second nested part 61, the outer wall surface of the nut is in contact with the abutting wall, and when the sleeve 20 rotates, the nut is pressed against the abutting wall and can rotate together with the sleeve 20.

[0101] The descriptions of the above embodiments tend to emphasize the differences between the embodiments, and their similarities or similarities can be referred to each other. For the sake of brevity, they will not be repeated herein.

[0102] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A nut disassembler, characterized in that: include: Mounting seat; A sleeve is rotatably mounted on the mounting seat, wherein one end of the sleeve along the axial direction is open and forms a first nesting portion for fitting a nesting nut; A driving member, mounted on the mounting seat and connected to the sleeve, the driving member is used to drive the sleeve to rotate to provide a torque for screwing the nut; In which, the sleeve has a accommodating chamber which axially passes through the first nesting portion and is used to accommodate the nut, and a transmission component is provided in the accommodating chamber. The transmission component includes a transmission rod extending along the axial direction of the sleeve, one end of the transmission rod is provided in the accommodating chamber, and the other end opposite to the transmission rod extends to the lower part of the first nesting portion or extends into the first nesting portion, and the transmission rod is used for allowing the nut to move along the axial direction of the sleeve so that the nut can move back and forth between the accommodating chamber and the first nesting portion.

2. The nut disassembler according to claim 1, characterized in that: The transmission rod is provided with an external thread matched with the internal thread of the nut, and the external thread extends from the accommodating chamber to the lower part of the first nesting part or extends into the first nesting part.

3. The nut disassembler according to claim 2, characterized in that: The inner wall surface of the first nesting portion has an annular abutting wall adapted to the shape of the nut, and the annular abutting wall extends along the axial direction of the sleeve to the end of the accommodating chamber away from the first nesting portion. The nut disassembler also includes a mounting cylinder installed on the mounting seat and coaxially arranged with the sleeve, and the end of the sleeve away from the first nesting portion is rotatably inserted into the mounting cylinder, and the transmission rod can switch between a first state and a second state relative to the mounting cylinder; Among them, when the transmission rod is in the first state, the transmission rod can rotate synchronously with the sleeve so that the nut is stationary relative to the transmission rod; when the transmission rod is in the second state, the transmission rod is stationary relative to the mounting tube so that the nut can move up and down along the transmission rod when the sleeve rotates.

4. The nut disassembler according to claim 3, characterized in that: The transmission component also includes: a connecting member, the connecting member being arranged in the sleeve and fixedly connected to the wall of the containing chamber, the end of the transmission rod away from the first nesting portion being connected to the connecting member, so that the transmission rod can rotate synchronously with the sleeve when in the first state; and A limit member, wherein the limit member is slidably installed in the mounting tube along the axial direction of the mounting tube, and the limit member can slide between a first position and a second position, wherein when the limit member is in the first position, the limit member is connected to the transmission rod, so that the transmission rod is switched to the second state, thereby limiting the transmission rod from rotating with the sleeve, and when the limit member is in the second position, the limit member is disengaged from the transmission member, so that the transmission rod is switched to the second state and can rotate with the sleeve.

5. The nut disassembler according to claim 4, characterized in that: At least one of the side wall of the installation tube and the outer peripheral wall of the limiting member is provided with a slide groove, and at least the other of the side wall of the installation tube and the outer peripheral wall of the limiting member is provided with a slider adapted to engage with the slide groove, and the slide groove is arranged parallel to the axial direction of the installation tube; When the slider moves axially along the mounting tube to one end of the slide groove facing the transmission rod, the limit member is in the first position; when the slider moves axially along the mounting tube to one end of the slide groove facing away from the transmission rod, the limit member is in the second position.

6. The nut disassembler according to claim 4, characterized in that: The transmission assembly further comprises a rotating member capable of self-rotation along the axial direction of the installation tube, the rotating member is installed in the installation tube and is located on a side of the limiting member away from the transmission rod, the rotating member is provided with a first magnetic member, and the limiting member is provided with a second magnetic member; When the rotating member rotates by a preset angle, the first magnetic member and the second magnetic member are magnetically attracted to each other, so that the limiting member slides from the first position to the second position; when the rotating member rotates by another preset angle, the first magnetic member and the second magnetic member are magnetically repelled to each other, so that the limiting member slides from the second position to the first position.

7. The nut disassembler according to claim 6, characterized in that: The first magnetic part includes a plurality of first permanent magnets evenly spaced along the circumference of the mounting tube, and the ends of two adjacent first permanent magnets facing the limit member have opposite polarities. The second magnetic part includes a plurality of second permanent magnets whose number is equal to the number of the first permanent magnets, and the ends of two adjacent second permanent magnets facing the rotating member have opposite polarities. The plurality of second permanent magnets are arranged one-to-one with the plurality of first permanent magnets along the axial direction of the mounting tube.

8. The nut disassembler according to claim 7, characterized in that: The mounting tube is also rotatably connected to a first knob, the first knob is connected to the rotating member, and the first knob is used to drive the rotating member to rotate.

9. The nut disassembler according to any one of claims 4 to 8, characterized in that: A clamping structure is provided between the transmission rod and the limiting member. When the limiting member is in the first position, the limiting member is clamped with the transmission rod through the clamping structure.

10. The nut disassembler according to claim 9, characterized in that: The clamping structure includes a clamping groove and a clamping block that are clamped together along the axial direction of the transmission rod, the end of the transmission rod away from the first nesting part protrudes from the connecting piece, the clamping groove is arranged at the end of the transmission rod away from the first nesting part, the clamping block is arranged at the limiting piece, and / or the clamping block is arranged at the end of the transmission rod away from the first nesting part, and the clamping groove is arranged at the limiting piece.

11. The nut disassembler according to any one of claims 1 to 8, characterized in that: The nut disassembler also includes an adjusting cylinder that can be adapted to be embedded in the first nesting portion. The adjusting cylinder is coaxially arranged with the sleeve and passes through the accommodating chamber. The adjusting cylinder is open at the end facing away from the accommodating chamber and forms a second nesting portion for adapting to the nested nut. The second nesting portion and the first nesting portion are used to adapt to nuts with different outer diameters.

12. The nut disassembler according to claim 11, characterized in that: The nut disassembler comprises a plurality of adjusting cylinders, each of which has the second nesting portion with a different inner size so as to be adapted to nuts with different outer diameters.

13. The nut disassembler according to any one of claims 1 to 8, characterized in that: The driving member includes a motor and a synchronous belt. The motor is mounted on the mounting seat. The outer wall of the sleeve is sleeved with a first gear. One end of the synchronous belt is wound around the output shaft of the motor, and the other end of the synchronous belt is wound around the first gear.

14. The nut disassembler according to claim 13, characterized in that: A second gear is sleeved on the output shaft of the motor, and the synchronous belt is wound around the second gear. A second knob is rotatably connected to the output shaft of the motor, and the end face of the second knob facing the second gear abuts against the wheel surface of the second gear. The second knob can be rotated relative to the output shaft of the motor to squeeze the second gear, thereby adjusting the rotation speed of the second gear.

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