Quick dismounting and mounting device for grinding wheel

Abstract

The utility model discloses a quick dismounting and mounting device for a grinding wheel. The quick dismounting and mounting device comprises a lower connecting disc, an upper mounting plate arranged on the lower connecting disc, and a supporting disc arranged between the upper mounting plate and the lower connecting disc. The grinding wheel is contained between the upper mounting plate and the supporting disc, and the screw penetrates through the lower connecting disc. The supporting disc is rotatably arranged at the end of the screw rod, and the screw rod can rotate relative to the lower connecting disc and conduct lifting motion. The technical problems that an existing grinding wheel disassembling and assembling device is large in operation difficulty, large in labor intensity of workers and low in efficiency can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of railway engineering machinery, and in particular to a grinding wheel quick disassembly and assembly device used for rail grinding. Background Art

[0002] During the operation of trains, rails are in a harsh working environment for a long time. Multiple reasons such as dynamic effects, natural environment and the quality of the rails themselves lead to the continuous deterioration of rail surface conditions and deformation of rail heads, resulting in defects such as wave wear, fat edges, peeling, and fish scales on the rail surface, which affect driving safety. Rail grinding can remove the unevenness of the rail surface and restore the rail head to the initial design requirements, thereby effectively improving the wheel-rail relationship, slowing down the development of rail surface defects, improving the smoothness of the rail surface, and extending the service life of the rail.

[0003] The main grinding tool of the rail grinding car is the grinding wheel installed on the grinding unit. Since the grinding wheel is a consumable part, it needs to be replaced frequently during the grinding operation. At present, the replacement of the grinding wheel of the rail grinding car is basically done manually, and the operator needs to replace the grinding wheel in a small space under the car or in a ditch. Some operators use one hand to lift the grinding wheel and complete the installation and removal of the grinding wheel fastening screws at the same time. Another part of the operators use two-person collaboration, one person lifts the grinding wheel and the other completes the removal of the grinding wheel fastening screws. However, since the weight of the grinding wheel is about 10kg, whether it is a single person or a double person, it is very laborious to complete the disassembly and installation of the grinding wheel. The labor intensity is high and the efficiency is low, which seriously reduces the effective action time of the rail grinding car.

[0004] In summary, the current grinding wheel disassembly and assembly methods mainly have the following technical defects:

[0005] 1) There is no special grinding wheel replacement tooling, and the operation is difficult;

[0006] 2) Manually lifting the grinding wheel is labor-intensive, has high safety risks, and is prone to injury;

[0007] 3) Multiple people are required to cooperate in construction and replacement;

[0008] 4) It takes repeated attempts to align the holes, resulting in low operating efficiency;

[0009] 5) It does not have adaptive adjustment function and the working range is very limited.

[0010] Therefore, designing a portable grinding wheel quick disassembly and assembly device with a light structure and high efficiency is of great significance for reducing labor intensity, improving work efficiency and work safety. Utility Model Content

[0011] In view of this, the purpose of the present application is to provide a grinding wheel quick disassembly and assembly device to solve the technical problems of the existing grinding wheel disassembly and assembly device being difficult to operate, having high labor intensity and low efficiency.

[0012] In order to achieve the above-mentioned utility model purpose, the present application specifically provides a technical implementation scheme of a grinding wheel quick disassembly and assembly device, including: a lower connecting plate, an upper mounting plate arranged on the lower connecting plate, and a support plate arranged between the upper mounting plate and the lower connecting plate. The grinding wheel is accommodated between the upper mounting plate and the support plate, and the screw passes through the lower connecting plate. The support plate is rotatably arranged at the end of the screw, and the screw can rotate and perform lifting and lowering movements relative to the lower connecting plate. When the grinding wheel needs to be installed, the grinding wheel is placed on the support plate, and the screw is rotated to make the support plate rise relative to the lower connecting plate until the grinding wheel is fastened between the upper mounting plate and the support plate, and then the grinding wheel is installed. When the grinding wheel needs to be disassembled, the screw is rotated to make the support plate rise relative to the lower connecting plate until the support plate is against the grinding wheel, and then the grinding wheel is disassembled, and the screw is rotated in the opposite direction to make the support plate descend relative to the upper mounting plate until the grinding wheel falls to the lower connecting plate, and the disassembly of the grinding wheel is completed.

[0013] Furthermore, the grinding wheel is fixed to the grinding wheel connecting plate by connecting bolts, a stop block is arranged on the grinding wheel connecting plate, and a positioning hole for limiting the stop block is opened on the upper mounting plate.

[0014] Furthermore, a hand-held anti-rotation rod is provided on the lower connecting plate to prevent the disassembly and assembly device from rotating when disassembling or installing the grinding wheel.

[0015] Furthermore, a limiting block is provided on the lower connecting plate, and the limiting block is used to limit the grinding wheel.

[0016] Furthermore, an end cover is provided on the support plate, and a bearing is provided between the screw rod and the support plate.

[0017] Furthermore, the bearing is an angular contact ball bearing.

[0018] Furthermore, a rotating rod is provided at the other end of the screw rod.

[0019] Furthermore, the lower connecting plate is provided with a threaded sleeve, and the screw rod is provided with an external thread having a rotation direction opposite to that of the internal thread of the threaded sleeve.

[0020] Furthermore, a trapezoidal thread matching structure is adopted between the screw rod and the threaded sleeve.

[0021] Furthermore, the lower connecting plate and the supporting plate both adopt a disc-shaped structure, and a grinding wheel bottom supporting surface and an inner circle positioning surface are concentrically arranged on the supporting plate, and the grinding wheel can be quickly aligned through the grinding wheel bottom supporting surface and the inner circle positioning surface.

[0022] Furthermore, the upper mounting plate is provided with an arc-shaped slot, which can quickly cooperate with the top arc of the grinding wheel connecting plate to achieve rapid centering and positioning of the grinding wheel quick disassembly and assembly device, the grinding wheel and the grinding wheel connecting plate.

[0023] By implementing the technical solution of the grinding wheel quick disassembly and assembly device provided by the present application, the following beneficial effects are achieved:

[0024] (1) The grinding wheel quick disassembly and assembly device of the present application adopts a hanging bearing structure, which is easy and simple to install and can realize the quick installation and disassembly of the grinding wheel. When a single person replaces the grinding wheel, there is no need to hold the grinding wheel by hand, which greatly reduces the labor intensity and avoids the safety risk of the grinding wheel falling and hitting the victim;

[0025] (2) The grinding wheel quick disassembly and assembly device of the present application adopts a hand-held anti-rotation structure, which can prevent the grinding wheel from rotating when removing the bolts when a single person replaces the grinding wheel, and can efficiently replace the grinding wheel. At the same time, it can realize the rapid centering and positioning of the grinding wheel and the connecting plate;

[0026] (3) The grinding wheel quick disassembly and assembly device of the present application has a light overall structure, adjustable height, complete functions, good portability, and strong adaptability. It avoids the shortcomings of traditional grinding wheel quick disassembly and assembly devices such as complex structure and heavy weight, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other embodiments can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application;

[0029] Figure 2 It is a structural schematic diagram of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application from another viewing angle;

[0030] Figure 3 It is a schematic cross-sectional structure diagram of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application;

[0031] Figure 4It is a schematic cross-sectional structure diagram of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application at another viewing angle;

[0032] Figure 5 It is a three-dimensional structural schematic diagram of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application;

[0033] Figure 6 It is a schematic top view of the structure of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application;

[0034] Figure 7 It is a schematic diagram of a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application and the installation structure of the grinding wheel;

[0035] In the figure: 1-upper mounting plate, 2-connecting rod, 3-hand-held anti-rotation rod, 4-lower connecting plate, 5-limiting block, 6-support plate, 7-end cover, 8-screw, 9-rotating rod, 10-bearing, 11-threaded sleeve, 12-grinding unit, 13-grinding wheel connecting plate, 14-grinding wheel, 15-stop block, 16-connecting bolt, 17-positioning hole, 18-grinding wheel bottom support surface, 19-inner circle positioning surface, 20-arc-shaped slot, 100-grinding wheel quick disassembly and assembly device. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] As attached Figure 1 To Attachment Figure 7 As shown, a specific embodiment of the grinding wheel quick disassembly and assembly device of the present application is given, and the present application is further described below in conjunction with the drawings and specific embodiments.

[0038] Example 1

[0039] As attached Figure 1 To Attachment Figure 7As shown, an embodiment of the grinding wheel quick disassembly and assembly device of the present application specifically includes: a lower connecting plate 4, an upper mounting plate 1 arranged on the lower connecting plate 4, and a support plate 6 arranged between the upper mounting plate 1 and the lower connecting plate 4. The upper mounting plate 1 and the lower connecting plate 4 are connected by a connecting rod 2, the grinding wheel 14 is accommodated between the upper mounting plate 1 and the support plate 6, and the screw 8 passes through the lower connecting plate 4. The support plate 6 is rotatably arranged at the end of the screw 8, and the screw 8 can rotate and move up and down relative to the lower connecting plate 4. When the grinding wheel 14 needs to be installed, the grinding wheel 14 of the grinding unit 12 is placed on the support plate 6, and the screw 8 is rotated to make the support plate 6 rise relative to the lower connecting plate 4 until the grinding wheel 14 is fastened between the upper mounting plate 1 and the support plate 6, and then the grinding wheel 14 is installed. When the grinding wheel 14 needs to be disassembled, the screw 8 is rotated to make the support plate 6 rise relative to the lower connecting plate 4 until the support plate 6 is against the grinding wheel 14, and then the grinding wheel 14 is disassembled, and the screw 8 is rotated in the opposite direction to make the support plate 6 descend relative to the upper mounting plate 1 until the grinding wheel 14 falls to the lower connecting plate 4, completing the disassembly of the grinding wheel 14.

[0040] The grinding wheel 14 is fixed to the grinding wheel connecting plate 13 by connecting bolts 16. The grinding wheel connecting plate 13 is provided with a stop block 15. The upper mounting plate 1 is provided with a positioning hole 17 for limiting the stop block 15. The grinding wheel quick disassembly and assembly device 100 can be directly hung on the top surface of the grinding wheel connecting plate 13, and the positioning is limited by the two symmetrical positioning holes 17 on the top surface of the grinding wheel quick disassembly and assembly device 100 and the stop block connecting bolts 16 of the grinding wheel connecting plate 13. A hand-held anti-rotation rod 3 is provided on the lower connecting plate 4, which is used to prevent the grinding wheel quick disassembly and assembly device 100 from rotating when disassembling or installing the grinding wheel 14. The hand-held anti-rotation rod 3 can be replaced by a rotating wheel. A limiting block 5 is also provided on the lower connecting plate 4, and the limiting block 5 is used to limit the grinding wheel 14.

[0041] An end cap 7 is provided on the support plate 6, and a bearing 10 is provided between the screw rod 8 and the support plate 6. The bearing 10 is preferably an angular contact ball bearing, and the angular contact ball bearing is also replaced by a radial thrust bearing or a set of radial bearings and thrust bearings. A rotating rod 9 is provided at the other end of the screw rod 8. A threaded sleeve 11 is provided on the lower connecting plate 4, and an external thread with a rotation direction opposite to the internal thread of the threaded sleeve 11 is provided on the screw rod 8. The screw rod 8 and the threaded sleeve 11 are matched with a trapezoidal thread, which is more conducive to connection and power transmission. Among them, the upper mounting plate 1, the connecting rod 2, the hand-held anti-rotation rod 3, the lower connecting plate 4 and the threaded sleeve 11 are preferably connected together by welding. The screw and threaded sleeve rotating ascending structure can be replaced by a worm turbine ascending structure. When the worm wheel is used for rotation, the inner ring of the worm wheel is a threaded structure, which is equivalent to the nut of the screw rod, and cooperates with the screw rod, thereby driving the screw rod to move up and down to realize the transmission of motion. The lower connecting plate 4 and the supporting plate 6 are both disc-shaped structures. The supporting plate 6 is concentrically provided with a grinding wheel bottom supporting surface 18 and an inner circle positioning surface 19, through which the grinding wheel 14 can be quickly aligned.

[0042] The upper mounting plate 1 is provided with an arc-shaped slot 20, which can quickly cooperate with the top arc of the grinding wheel connecting plate 13 to achieve rapid centering and positioning of the grinding wheel quick disassembly and assembly device 100, the grinding wheel 14 and the grinding wheel connecting plate 13. The structural parts of the grinding wheel quick disassembly and assembly device 100 are all designed with lightweight structures, and a large number of weight-reducing holes are provided, so that the whole device is very convenient to carry and use.

[0043] The grinding wheel quick disassembly and assembly device 100 described in Example 1 avoids the cumbersome operation of the traditional design fixed on the rail, and avoids the heavy and inconvenient handling and use of the traditional design driven by a motor. It can achieve that a single person does not need to hold a 10kg grinding wheel by hand when replacing the grinding wheel, greatly reducing the labor intensity and avoiding the safety risk of the grinding wheel falling and hitting. The grinding wheel quick disassembly and assembly device 100 makes full use of the structural characteristics of the grinding unit 12 and the grinding wheel connecting plate 13 itself, and is designed to be lightweight, portable, and easy to operate. Through this device, it can be achieved when a single person replaces the grinding wheel, the self-rotation behavior of the grinding wheel is prevented, and the grinding wheel can be replaced efficiently. The grinding wheel quick disassembly and assembly device 100 adopts a hanging installation, which is light and simple to install, can be quickly installed and removed, and has a light structure, complete functions, and is very portable and easy to operate. The grinding wheel quick disassembly and assembly device 100 has a centering function, which can realize the rapid positioning and centering of the grinding wheel and the connecting plate. It is designed with a set of convenient lifting devices, which can adjust the height and have strong adaptability. A set of rotating devices is designed to realize the rapid positioning between the grinding wheel and the connecting plate. The grinding wheel quick disassembly and assembly device 100 does not require the cooperation of equipment such as a motor drive, thereby avoiding the defects of the product such as complex structure, low portability and high manufacturing price. It can be widely promoted and used, and has a very broad market prospect.

[0044] Example 2

[0045] An embodiment of a method for quickly disassembling and assembling a grinding wheel based on the device described in embodiment 1 specifically comprises the following steps:

[0046] When the old grinding wheel 14 needs to be removed, the rotating rod 9 is rotated clockwise, and the screw 8 moves upward in the vertical direction along the threaded sleeve 11 until the support disc 6 pushes into the inner ring of the grinding wheel 14 and can no longer rise. At this time, the load of the grinding wheel 14 is completely borne by the support disc 6. Since the grinding wheel connecting disc 13 and the grinding wheel 14 are fastened and connected by the (grinding wheel) connecting bolts 16. If the connecting bolts 16 are directly loosened, the grinding wheel 14 and the connecting disc 13 will rotate together. At this time, hold (fix) the hand-held anti-rotation rod 3 with one hand, and loosen the connecting bolts 16 on the grinding wheel connecting disc 13 with the other hand. Loosen the three connecting bolts 16 in sequence along the circumferential surface of the grinding wheel 14, and the separation of the grinding wheel 14 and the grinding wheel connecting disc 13 is completed. Then rotate the rotating rod 9 in the opposite direction (counterclockwise) to make the screw 8 move downward in the vertical direction along the threaded sleeve 11, and continue to rotate the rotating rod 9 until the lower end surface of the grinding wheel 14 falls to the upper plane of the lower connecting plate 4, and the end cover 7 sinks into the lower connecting plate 4, and the grinding wheel 14 can be pushed flat to the outside of the grinding wheel quick disassembly and assembly device 100.

[0047] The grinding wheel quick disassembly and assembly method described in Example 2 also includes the following steps:

[0048] When the old grinding wheel 14 is removed and a new grinding wheel 14 needs to be installed, the grinding wheel 14 is placed on the upper plane of the lower connecting plate 4, and is pushed flat to the center of the circle of the lower connecting plate 4 until the outer annular surface of the grinding wheel 14 is blocked and limited by the stop block 5, and then the rotating rod 9 is rotated clockwise until the support plate 6 abuts against the grinding wheel 14 and finally rises to contact with the grinding wheel connecting plate 13. Since a stop block 15 is provided on the grinding wheel connecting plate 13, when the upper end surface of the grinding wheel 14 is not aligned with the stop block 15, the grinding wheel connecting plate 13 is rotated by fine adjustment until the stop block 15 on the grinding wheel connecting plate 13 is aligned with the upper end surface of the grinding wheel 14, and then the rotating rod 9 is continued to be rotated to make the support plate 6 rise until the upper end surface of the grinding wheel 14 abuts against and fits with the lower end surface of the grinding wheel connecting plate 13. Due to the design of the bearing 10, when the rotating rod 9 is rotated, the screw rod 8 will also rotate and rise synchronously, but the support plate 6 will not rotate accordingly, and this structural design facilitates the matching installation between the grinding wheel 14 and the grinding wheel connecting plate 13. In addition, the support plate 6 is provided with a grinding wheel bottom support surface 18 and an inner ring positioning surface 19, and this structural design can realize the rapid centering of the grinding wheel 14.

[0049] When the grinding wheel quick disassembly and assembly device 100 needs to be installed, the grinding wheel quick disassembly and assembly device 100 is first hung as a whole on the top surface of the grinding wheel connecting disk 13, and the lower plane of the upper mounting plate 1 is fitted with the top surface of the grinding wheel connecting disk 13. During the hanging process, the arc-shaped slot 20 is first quickly matched with the arc surface on the top of the grinding wheel connecting disk 13, and then the positioning hole 17 is used to position and match with the stop block 15 on the grinding wheel connecting disk 13, and the upper mounting plate 1 is prevented from relative rotation during subsequent use, so that the upper mounting plate 1 and the grinding wheel connecting disk 13 maintain synchronous movement. When the grinding wheel quick disassembly and assembly device 100 needs to be removed, it is only necessary to lift the grinding wheel quick disassembly and assembly device 100 upward in the vertical direction for a certain distance, separate the lower plane of the upper mounting plate 1 from the height of the protrusion of the plane stop block 15 on the grinding wheel connecting disk 13, and then remove the entire grinding wheel quick disassembly and assembly device 100 from the side.

[0050] In the description of this application, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly disposed on the other element or indirectly disposed 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.

[0051] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0053] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0054] By implementing the technical solution of the grinding wheel quick disassembly and assembly device described in the specific embodiment of the present application, the following technical effects can be produced:

[0055] (1) The grinding wheel quick disassembly and assembly device described in the specific embodiment of the present application adopts a hanging bearing structure, which is easy and simple to install and can realize the quick installation and disassembly of the grinding wheel. When a single person replaces the grinding wheel, there is no need to hold the grinding wheel by hand, which greatly reduces the labor intensity and avoids the safety risk of the grinding wheel falling and hitting the victim;

[0056] (2) The grinding wheel quick disassembly and assembly device described in the specific embodiment of the present application adopts a hand-held anti-rotation structure, which can prevent the grinding wheel from rotating when removing the bolts when a single person replaces the grinding wheel, and can efficiently replace the grinding wheel. At the same time, it can realize the rapid centering and positioning of the grinding wheel and the connecting plate;

[0057] (3) The grinding wheel quick disassembly and assembly device described in the specific embodiment of the present application has a light overall structure, adjustable height, complete functions, good portability, and strong adaptability. It avoids the shortcomings of traditional grinding wheel quick disassembly and assembly devices such as complex structure and heavy weight, and is more convenient to use.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] The above is only a preferred embodiment of the present application, and does not constitute any formal limitation to the present application. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes, without departing from the spirit and technical solution of the present application. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not depart from the content of the technical solution of the present application, still falls within the scope of protection of the technical solution of the present application.

Claims

1. A grinding wheel quick disassembly and assembly device, characterized in that: include: A lower connecting plate (4), an upper mounting plate (1) arranged on the lower connecting plate (4), and a support plate (6) arranged between the upper mounting plate (1) and the lower connecting plate (4); a grinding wheel (14) is accommodated between the upper mounting plate (1) and the support plate (6), and a screw rod (8) passes through the lower connecting plate (4); the support plate (6) is rotatably arranged at the end of the screw rod (8), and the screw rod (8) can rotate relative to the lower connecting plate (4) and perform lifting and lowering movements.

2. The grinding wheel quick disassembly and assembly device according to claim 1, characterized in that: The grinding wheel (14) is fixed to the grinding wheel connecting plate (13) by means of connecting bolts (16); a stop block (15) is provided on the grinding wheel connecting plate (13); and a positioning hole (17) for limiting the stop block (15) is provided on the upper mounting plate (1).

3. The grinding wheel quick disassembly and assembly device according to claim 2, characterized in that: The lower connecting plate (4) is provided with a hand-held anti-rotation rod (3) for preventing the disassembly and assembly device from rotating when disassembling or installing the grinding wheel (14).

4. The grinding wheel quick disassembly and assembly device according to claim 2 or 3, characterized in that: A limiting block (5) is also provided on the lower connecting plate (4), and the limiting block (5) is used to limit the position of the grinding wheel (14).

5. The grinding wheel quick disassembly and assembly device according to claim 4, characterized in that: An end cover (7) is provided on the support plate (6), and a bearing (10) is provided between the screw rod (8) and the support plate (6).

6. The grinding wheel quick disassembly and assembly device according to claim 5, characterized in that: The bearing (10) is an angular contact ball bearing.

7. The grinding wheel quick disassembly and assembly device according to claim 1, 2, 3, 5 or 6, characterized in that: A rotating rod (9) is provided at the other end of the screw rod (8).

8. The grinding wheel quick disassembly and assembly device according to claim 7, characterized in that: The lower connecting plate (4) is provided with a threaded sleeve (11), and the screw rod (8) is provided with an external thread having a rotation direction opposite to that of the internal thread of the threaded sleeve (11).

9. The grinding wheel quick disassembly and assembly device according to claim 8, characterized in that: A trapezoidal thread matching structure is adopted between the screw rod (8) and the threaded sleeve (11).

10. The grinding wheel quick disassembly and assembly device according to claim 1, 2, 3, 5, 6, 8 or 9, characterized in that: The lower connecting plate (4) and the supporting plate (6) both adopt a disc-shaped structure. A grinding wheel bottom supporting surface (18) and an inner circle positioning surface (19) are concentrically arranged on the supporting plate (6). The grinding wheel bottom supporting surface (18) and the inner circle positioning surface (19) are used to realize the rapid centering of the grinding wheel (14).

11. The grinding wheel quick disassembly and assembly device according to claim 10, characterized in that: The upper mounting plate (1) is provided with an arc-shaped slot (20), which can quickly cooperate with the top arc of the grinding wheel connecting plate (13), thereby realizing the rapid centering and positioning of the grinding wheel quick disassembly and assembly device (100), the grinding wheel (14) and the grinding wheel connecting plate (13).

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