Grinding unit assembling and disassembling assembly convenient to overhaul

Abstract

The utility model discloses a grinding unit assembling and disassembling assembly convenient to overhaul, which comprises a grinding unit, a grinding unit support and an anti-falling assembly, a back plate is arranged on the upper side of the grinding unit, and a mounting groove with openings at the front end and the rear end is arranged on the back plate. An end plate located in the middle of a front end opening or the middle of a rear end opening of the mounting groove divides the front end opening or the rear end opening of the mounting groove into two first insertion holes located in the left side and the right side, the grinding sub-support comprises a base plate, and the left side and the right side of the front end or the rear end of the base plate are each provided with an arm plate extending outwards. The back plate is located in the mounting groove in a penetrating connection mode, the arm plates located on the left side and the right side of the base plate correspondingly penetrate out of the two first insertion holes located in the left side and the right side of the end plate and extend out of the mounting groove, the arm plates are provided with second insertion holes and third insertion holes in the front-back direction, the anti-disengaging assembly comprises a check block and two n-shaped insertion rods, and the check block is located on the outer side face of the end plate in an attached mode; through holes are formed in the two ends of the check block respectively, the n-shaped insertion rods are provided with first insertion arm rods and second insertion arm rods, the first insertion arm rods are longer than the second insertion arm rods, one n-shaped insertion rod is inserted into the arm plate located on the left side of the base plate, and the other n-shaped insertion rod is inserted into the arm plate located on the right side of the base plate. The first insertion arm rods are connected into the corresponding second insertion holes in a limiting and penetrating mode through elastic limiting assemblies capable of stretching out and drawing back in the front-back direction, and the second insertion arm rods are connected into the corresponding through holes in the check blocks and the corresponding third insertion holes in a penetrating mode. According to the grinding unit assembling and disassembling assembly convenient to overhaul, the grinding unit is easy to overhaul and replace, and the overhaul efficiency of the grinding unit is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of train track tread cleaning equipment, in particular to a grinding sub-assembly and disassembly component which is convenient for maintenance. Background Art

[0002] The tread cleaner is usually installed on the rail vehicle corresponding to the wheel of the rail vehicle, and it can controllably use the grinding block (or called "grinder") installed thereon to rub on the wheel tread, thereby producing a tread cleaning and repairing effect on the vehicle tread. The structure of the tread cleaner of the prior art mostly includes a grinder and a grinder holder. After the grinder and the grinder holder are connected, they are locked by an anti-slip device. Since the grinder is a wearing part, it needs to be frequently loaded and unloaded and repaired. However, most of the anti-slip devices in the existing tread cleaners are hook-tongue and socket pin-connected assemblies, that is, the structure of the anti-slip device is relatively complex. Therefore, it is inconvenient to disassemble in the narrow use space scenario where the tread cleaner is located, resulting in a long time for the maintenance and replacement of the grinder, which seriously restricts the maintenance efficiency of the tread cleaner on the entire locomotive group. To this end, the utility model proposes a grinder assembly and disassembly assembly that is easy to maintain, in order to solve the above technical problems. Summary of the Invention

[0003] The utility model aims to overcome the defects in the prior art and provide a grinding wheel assembly and disassembly assembly that is easy to repair. When repairing and replacing the grinding wheel, the operator only needs to hold one side of the N-shaped insertion rod and apply force to the side away from the grinding wheel support so that the insertion arm rod two comes out of the through hole corresponding to the end of the stopper, and then flip the stopper and the end thereof to be misaligned with the insertion hole three to loosen the N-shaped insertion rod. Similarly, the other end of the stopper is removed and the old grinding wheel is finally removed. When installing a new grinding wheel, the new grinding wheel is re-inserted on the grinding wheel support. Subsequently, the operator holds one side of the N-shaped insertion rod and applies force to the side away from the grinding wheel support so that the insertion arm rod two avoids the installation position corresponding to the end of the stopper, and then one end of the stopper is affixed to the front side or the rear side of the substrate, and loosens the N-shaped insertion rod. Then the insertion arm rod two on the N-shaped insertion rod is connected to the through hole corresponding to the end of the baffle, and the plug-in installation of the other end of the baffle is completed in the same way. The operation is simple and the maintenance efficiency of the grinding wheel is greatly improved. The structural design is simple, the preparation and implementation feasibility is high, and the practicality is strong.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is to design a grinding subassembly with easy maintenance, including a grinding subassembly, a grinding subassembly holder and an anti-slip assembly, the upper side of the grinding subassembly is provided with a back plate, the back plate is provided with a mounting groove with front and rear end openings, the end plate located in the middle of the front port or the middle of the rear port of the mounting groove divides the front port or the rear port of the mounting groove into two jacks located on the left and right sides, the grinding subassembly holder includes a base plate, the left and right sides of the front end or the rear end of the base plate are respectively provided with an arm plate extending outward, when the grinding subassembly and the grinding subassembly holder are assembled in place, the back plate is connected to the inside of the mounting groove, and the arm plates located on the left and right sides of the base plate are connected from the two jacks located on the left and right sides of the end plate. The inside of each socket is correspondingly passed through and extended to the outside of the mounting slot, and the arm plate is provided with a socket two and a socket three along the front-to-back direction, and the anti-slip component includes a block and two N-shaped plug rods, the block is fitted on the outer surface of the end plate, and through holes are respectively provided at both ends of the block, the N-shaped plug rod has an insert arm rod one and an insert arm rod two, and the length of the insert arm rod one is greater than the length of the insert arm rod two, one of the N-shaped plug rods is inserted into the arm plate located on the left side of the base plate, and the other N-shaped plug rod is inserted into the arm plate located on the right side of the base plate, and the insert arm rod one is limited and connected to the corresponding socket two by an elastic limiting component that can be extended and retracted along the front-to-back direction, and the insert arm rod two is connected to the corresponding through hole on the block and the corresponding socket three.

[0005] The present invention provides a grinding wheel assembly and disassembly assembly that is convenient for maintenance. When inspecting and replacing the grinding wheel, the operator only needs to hold one side of the N-shaped insertion rod and apply force to the side away from the grinding wheel support so that the insertion arm rod two disengages from the through hole of the corresponding end of the stopper. Then, the end of the stopper is turned over and the insertion hole three are misaligned to release the N-shaped insertion rod. Similarly, the other end of the stopper is disassembled and the old grinding wheel is finally disassembled. When installing a new grinding wheel, the new grinding wheel is re-inserted on the grinding wheel support. Subsequently, the operator holds one side of the N-shaped insertion rod and applies force to the side away from the grinding wheel support so that the insertion arm rod two avoids the installation position of the corresponding end of the stopper. Then, one end of the stopper is fitted to the front side or rear side of the substrate and the N-shaped insertion rod is loosened. Then the insertion arm rod two on the N-shaped insertion rod is connected to the through hole of the corresponding end of the baffle. Similarly, the insertion installation of the other end of the baffle is completed, which is simple to operate and greatly improves the maintenance efficiency of the grinding wheel. The structural design is simple, the preparation and implementation feasibility is high, and the practicality is strong.

[0006] A preferred technical solution is that the arm plates on the left and right sides of the base plate are provided with corresponding slots opening into the gap between them, the three jacks extend through the slots on the arm plates, and the ends of the stopper are respectively embedded in the slots on the corresponding arm plates, with a gap remaining between the left or right end surface of the stopper and the vertical bottom surface of the corresponding slot. The end surfaces of the stopper are respectively embedded in the slots on the corresponding arm plates, resulting in a compact and reasonable structural design with good stability. The gap remaining between the left or right end surface of the stopper and the vertical bottom surface of the corresponding slot facilitates the flipping operation of the stopper during installation or removal, making it easier to inspect and replace the grinding wheel in a narrow operating space.

[0007] A further preferred technical solution is that one end of the insert arm rod is milled with a step column extending coaxially along its length direction.

[0008] A further preferred technical solution is that the second socket is a stepped hole structure that passes through the base plate, and the large diameter section of the second socket is located on the side of the base plate away from the arm plate, and further includes an internal threaded sleeve, the outer diameter of the internal threaded sleeve being less than the inner diameter of the large diameter section of the second socket, the stepped column having a threaded outer surface, the internal threaded sleeve being threadedly fixed to the stepped column, and a spring being sleeved at one end of the arm rod, the spring having one end abutting against the stepped surface between the large diameter section and the small diameter section of the second socket and the other end abutting against the internal threaded sleeve, the spring, the large diameter section of the second socket, and the internal threaded sleeve constituting the elastic limiting assembly. The elastic limiting assembly has a simple structural design and high feasibility in preparation and implementation.

[0009] A further preferred technical solution is that a hexagonal nut is provided at the end of the internally threaded sleeve away from the spring. The hexagonal nut helps to improve the clamping convenience of the internally threaded sleeve when installing or removing it with a wrench, thereby helping to improve the assembly and processing efficiency of the grinding sub-assembly assembly with easy maintenance of the utility model.

[0010] A further preferred technical solution is that the end of the hexagonal nut is provided with a pair of notched grooves at opposite ends of the same diameter in its cross section, and a cotter pin is inserted into the radial through-hole at the end of the stepped column. The ends of the cotter pin extending from the stepped column are correspondingly positioned within the notched grooves of the hexagonal nut. The cotter pin prevents the internally threaded sleeve from rotating, thereby ensuring that the easily accessible grinding head assembly and removal assembly of the present invention maintains a good anti-loosening effect during long-term use.

[0011] A further preferred technical solution is that an annular groove is provided on the inner side surface of the end of the large diameter section of the second jack, and a retaining ring is embedded in the annular groove for limiting the internal threaded sleeve to abut against the inside of the large diameter section of the second jack.

[0012] A further preferred technical solution is that the second socket is a stepped hole structure that passes through the substrate, and the large diameter section of the second socket is located on the side of the substrate away from the arm plate, one end of the arm rod is sleeved with a spring, and a spring support seat is sleeved and fixed on the step column, one end of the spring abuts on the step surface between the large diameter section and the small diameter section of the second socket, and the other end abuts on the spring support seat, and the spring, the large diameter section of the second socket and the spring support seat constitute the elastic limiting assembly.

[0013] A further preferred technical solution is that the outer side surface of the stepped column end is provided with an annular groove, within which a retaining ring is embedded for limiting contact with a spring support seat. The end of the spring support seat, remote from the spring, is provided with a countersunk groove structure, and the retaining ring is embedded within the countersunk groove of the spring support seat. The elastic limit assembly has a simple structural design and is highly feasible for manufacture and implementation.

[0014] A further preferred technical solution is that the stopper has an ear block extending upward to above the upper side of the base plate, and the ear block is provided with a weight-reducing hole. The ear block improves the convenience of holding the stopper, and the weight-reducing hole helps reduce the weight of the stopper and improves its ease of handling.

[0015] The advantages and beneficial effects of the utility model are:

[0016] The present invention provides a grinding wheel assembly and disassembly assembly that is convenient for maintenance. When inspecting and replacing the grinding wheel, the operator only needs to hold one side of the N-shaped insertion rod and apply force to the side away from the grinding wheel support so that the insertion arm rod two disengages from the through hole of the corresponding end of the stopper. Then, the end of the stopper is turned over and the insertion hole three are misaligned to release the N-shaped insertion rod. Similarly, the other end of the stopper is disassembled and the old grinding wheel is finally disassembled. When installing a new grinding wheel, the new grinding wheel is re-inserted on the grinding wheel support. Then, the operator holds one side of the N-shaped insertion rod and applies force to the side away from the grinding wheel support so that the insertion arm rod two avoids the installation position of the corresponding end of the stopper. Then, one end of the stopper is fitted to the front side or rear side of the substrate and the N-shaped insertion rod is loosened. Then the insertion arm rod two on the N-shaped insertion rod is connected to the through hole of the corresponding end of the baffle. Similarly, the insertion installation of the other end of the baffle is completed, which is simple to operate and greatly improves the maintenance efficiency of the grinding wheel. The structural design is simple, the preparation and implementation feasibility is high, and the practicality is strong.

[0017] 2. Both ends of the stopper are respectively embedded in the slots on the corresponding arm plates. The structural design is compact and reasonable with good stability. A gap is left between the left or right end face of the stopper and the vertical bottom surface of the corresponding slot, which facilitates the flipping operation when installing or removing the stopper, and makes it easier to inspect and replace the grinding wheel in a narrow operating space.

[0018] 3. A hexagonal nut is provided at the end of the internally threaded sleeve away from the spring. The hexagonal nut helps to improve the clamping convenience of the internally threaded sleeve when installing or removing it with a wrench, and helps to improve the assembly and processing efficiency of the grinding sub-assembly assembly of the utility model with easy maintenance.

[0019] 4. The cotter pin has a rotation-stopping effect on the internal threaded sleeve, thereby ensuring that the grinding subassembly assembly of the utility model, which is easy to maintain, still has a good anti-loosening effect during long-term use.

[0020] 5. The ear block improves the convenience of holding the block, and the weight-reducing hole helps to reduce the weight of the block and improve the ease of holding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the disassembled structure of a grinding subassembly assembly for easy maintenance in Example 1;

[0022] Figure 2 is a three-dimensional diagram of the n-shaped insertion rod in Example 1;

[0023] Figure 3 is a three-dimensional diagram of the grinding sub-holder in Example 1;

[0024] Figure 4 This is a left rear perspective view of a grinding subassembly assembly with easy maintenance in Example 1 (the grinding subassembly is omitted);

[0025] Figure 5 This is a top view of a grinding subassembly assembly that is easy to maintain in Example 1;

[0026] Figure 6 It is a top view (partial cross-section) of a grinding subassembly assembly with convenient maintenance in Example 1;

[0027] Figure 7 yes Figure 6 A partial enlarged view of the H in the middle;

[0028] Figure 8 It is a top view (partial cross-section) of a grinding subassembly assembly with convenient maintenance in Example 2;

[0029] Figure 9 yes Figure 8 A local enlarged view of the S in the middle;

[0030] Figure 10 It is a top view (partial cross-section) of a grinding subassembly assembly that is easy to maintain in Example 3;

[0031] Figure 11 yes Figure 10 A partial enlarged view of the middle W.

[0032] In the figure: 1. Grinding wheel; 2. Grinding wheel support; 3. Stop block; 4. N-shaped plug rod; 5. Spring; 1-1. Back plate; 1-1a. Mounting groove; 1-1b. End plate; 1-1c. Jack one; 2-1. Base plate; 2-2. Arm plate; 2-2a. Slot; 2-2b. Jack two; 2-2c. Jack three; 3-1. Through hole; 3-2. Ear block; 3-3. Weight reduction hole; 4-1. Insert arm rod one; 4-1a. Annular groove; 4-1b. Step column; 4-1c. Radial through hole; 4-2. Insert arm rod two; A. Spring support seat; B. Retaining ring; C. Internal threaded sleeve; C-1. Hexagonal nut; D. Split pin. DETAILED DESCRIPTION

[0033] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] Example 1

[0035] like Figures 1 to 7 As shown, the utility model is a grinding subassembly with easy maintenance, comprising a grinding subassembly 1, a grinding subassembly holder 2 and an anti-slip assembly, the grinding subassembly 1 having a back plate 1-1 on the upper side and a grinding subassembly on the lower side, the back plate 1-1 having a mounting groove 1-1a with front and rear end openings, an end plate 1-1b located in the middle of the front port or the middle of the rear port of the mounting groove 1-1a divides the front port or the rear port of the mounting groove 1-1a into two sockets 1-1c located on the left and right sides, the grinding subassembly holder 2 comprises a base plate 2-1, and an arm plate 2-2 extending outward is respectively provided on the left and right sides of the front or rear end of the base plate 2-1, when the grinding subassembly 1 and the grinding subassembly holder 2 are assembled in place, the back plate 1-1 is connected to the inside of the mounting groove 1-1a, and the arm plates 2-2 located on the left and right sides of the base plate 2-1 are inserted from the inside of the two sockets 1-1c located on the left and right sides of the end plate 1-1b. Correspondingly passing through and extending to the outside of the mounting groove 1-1a, the arm plate 2-2 is provided with a second socket 2-2b and a third socket 2-2c along the front-to-back direction, and the anti-slip component includes a block 3 and two N-shaped plug rods 4. The block 3 is fitted on the outer surface of the end plate 1-1b, and a through hole 3-1 is provided at both ends of the block 3. The N-shaped plug rod 4 has an insert arm rod 1 4-1 and an insert arm rod 2 4-2, and the length of the insert arm rod 1 4-1 is greater than the length of the insert arm rod 2 4-2. One of the N-shaped plug rods 4 is inserted into the arm plate 2-2 located on the left side of the base plate 2-1, and the other N-shaped plug rod 4 is inserted into the arm plate 2-2 located on the right side of the base plate 2-1, and the insert arm rod 1 4-1 is limited and connected to the corresponding socket 2 2-2b through an elastic limiting component that can be extended and retracted along the front-to-back direction, and the insert arm rod 2 4-2 is connected to the corresponding through hole 3-1 and the corresponding socket three 2-2c on the block 3.

[0036] Preferably, the arm plates 2-2 located on the left and right sides of the base plate 2-1 are respectively provided with a card slot 2-2a with an opening facing the inside of the gap between the two, the jack three 2-2c passes through the card slot 2-2a on the arm plate 2-2, and the two ends of the stopper 3 are respectively embedded in the card slot 2-2a located on the corresponding arm plate 2-2, and a gap is left between the left end face or the right end face of the stopper 3 and the vertical bottom surface of the corresponding card slot 2-2a.

[0037] Further preferably, the end of the insert arm 4-1 is further milled with a step column 4-1b extending coaxially along its length direction.

[0038] Further preferably, the jack 2-2b is a stepped hole structure that passes through the substrate 2-1, and the large diameter section of the jack 2-2b is located on the side of the substrate 2-1 away from the arm plate 2-2, and also includes an internal threaded sleeve C, the outer diameter of the internal threaded sleeve C is < the inner diameter of the large diameter section of the jack 2-2b, the step column 4-1b is provided with a threaded outer surface, the internal threaded sleeve C is screwed and fixed on the step column 4-1b, and the end of the arm rod 1 4-1 is also sleeved with a spring 5, one end of the spring 5 abuts on the step surface between the large diameter section and the small diameter section of the jack 2-2b, and the other end abuts on the internal threaded sleeve C, the spring 5, the large diameter section of the jack 2-2b and the internal threaded sleeve C constitute the elastic limiting component.

[0039] Further preferably, a hexagonal nut C-1 is provided at one end of the internal threaded sleeve C away from the spring 5 .

[0040] Further preferably, the end of the hexagonal nut C-1 is provided with a group of notched grooves located at both ends of the same diameter of its cross section, and a cotter pin D is passed through the radial through hole 4-1c located at the end of the step column 4-1b, and the two ends of the cotter pin D extending out of the step column 4-1b are correspondingly located inside the notched grooves of the hexagonal nut C-1.

[0041] Further preferably, the stopper 3 has an ear block 3-2 extending upward to above the upper side of the base plate 2-1, and a weight-reducing hole 3-3 is provided on the ear block 3-2.

[0042] Example 2

[0043] like Figures 8-9 As shown, the utility model is a grinding sub-assembly and disassembly assembly that is easy to maintain, which is different from the grinding sub-assembly and disassembly assembly that is easy to maintain in Example 1 in that: the inner side surface of the end of the large-diameter section of the second jack 2-2b is provided with an annular groove 4-1a, and the inside of the annular groove 4-1a is embedded with a retaining ring B for limiting the internal threaded sleeve C to abut against the inside of the large-diameter section of the second jack 2-2b.

[0044] Example 3

[0045] like Figures 10-11 As shown, the utility model is a grinding sub-assembly and disassembly component with easy maintenance, which is different from the grinding sub-assembly and disassembly component with easy maintenance in Example 1 in that: the described jack 2-2b is a stepped hole structure that passes through the base plate 2-1, and the large diameter section of the jack 2-2b is located on the side of the base plate 2-1 away from the arm plate 2-2, the end of the described arm rod 1 4-1 is sleeved with a spring 5, and the described step column 4-1b is sleeved and fixed with a spring support seat A, one end of the described spring 5 abuts on the step surface between the large diameter section and the small diameter section of the jack 2-2b, and the other end abuts on the described spring support seat A, the described spring 5, the large diameter section of the jack 2-2b and the spring support seat A constitute the described elastic limiting assembly.

[0046] Preferably, an annular groove 4-1a is provided on the outer side surface of the end of the step column 4-1b, and a retaining ring B is embedded inside the annular groove 4-1a for limiting the abutment against the spring support seat A. The end of the spring support seat A away from the spring 5 is set as a countersunk groove structure, and the retaining ring B is embedded inside the countersunk groove of the spring support seat A.

[0047] The operating principle of the grinding subassembly assembly with convenient maintenance in Examples 1 to 3 is as follows:

[0048] (1) Disassembly principle

[0049] When inspecting and replacing the grinding wheel 1, the operator holds one of the N-shaped insertion rods 4 and applies force to the side away from the grinding wheel holder 2, so that the second insertion arm rod 4-2 is disengaged from the through hole 3-1 corresponding to one end of the block 3, and then flips the end of the block 3 to make the block 3 rotate with the other end as the fulcrum; then, the operator holds the other N-shaped insertion rod 4 and applies force to the side away from the grinding wheel holder 2, so that the second insertion arm rod 4-2 is disengaged from the through hole 3-1 corresponding to the other end of the block 3; then, the block 3 is removed and the grinding wheel 1 is quickly disassembled from the grinding wheel holder 2.

[0050] (2) Installation principle

[0051] The mounting groove 1-1a of the new grinding wheel 1 is re-inserted into the base plate 2-1 on the grinding wheel holder 2. The operator holds one of the N-shaped insertion rods 4 and applies force to the side away from the grinding wheel holder 2, so that the end of the second insertion arm 4-2 avoids the slot 2-2a on the arm plate 2-2, and one end of the stopper 3 is embedded in the slot 2-2a on the arm plate 2-2. The N-shaped insertion rod 4 is loosened, so that the second insertion arm 4-2 on the N-shaped insertion rod 4 is re-inserted into the through hole 3-1 corresponding to the end of the stopper 3 under the elastic restoring force of the spring 5. and the inside of another section of the plug-in hole three 2-2c; similarly, the operator holds another N-shaped plug rod 4 and applies force to the side away from the grinding sub-holder 2, so that the end of the plug arm rod 2 4-2 avoids the slot 2-2a on the arm plate 2-2, and the other end of the block 3 is embedded in the slot 2-2a on the arm plate 2-2, and the N-shaped plug rod 4 is released, so that the plug arm rod 2 4-2 on the N-shaped plug rod 4 is re-inserted into the through hole 3-1 corresponding to the end of the block 3 and the inside of the other section of the plug-in hole three 2-2c under the action of the elastic restoring force of the spring 5.

[0052] The present invention provides a grinding wheel assembly and disassembly assembly that is convenient for maintenance. When inspecting and replacing the grinding wheel, the operator only needs to hold one side of the N-shaped insertion rod and apply force to the side away from the grinding wheel support so that the insertion arm rod two disengages from the through hole of the corresponding end of the stopper. Then, the end of the stopper is turned over and the insertion hole three are misaligned to release the N-shaped insertion rod. Similarly, the other end of the stopper is disassembled and the old grinding wheel is finally disassembled. When installing a new grinding wheel, the new grinding wheel is re-inserted on the grinding wheel support. Subsequently, the operator holds one side of the N-shaped insertion rod and applies force to the side away from the grinding wheel support so that the insertion arm rod two avoids the installation position of the corresponding end of the stopper. Then, one end of the stopper is fitted to the front side or rear side of the substrate and the N-shaped insertion rod is loosened. Then the insertion arm rod two on the N-shaped insertion rod is connected to the through hole of the corresponding end of the baffle. Similarly, the insertion installation of the other end of the baffle is completed, which is simple to operate and greatly improves the maintenance efficiency of the grinding wheel. The structural design is simple, the preparation and implementation feasibility is high, and the practicality is strong.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A grinding subassembly assembly with convenient maintenance, characterized in that: The invention comprises a grinding wheel (1), a grinding wheel holder (2) and an anti-drop assembly, wherein the grinding wheel (1) has a back plate (1-1) on its upper side, the back plate (1-1) has a mounting groove (1-1a) with front and rear end openings, an end plate (1-1b) located in the middle of the front port or the middle of the rear port of the mounting groove (1-1a) divides the front port or the rear port of the mounting groove (1-1a) into two plug holes (1-1c) located on the left and right sides, and the grinding wheel holder (2) comprises a base plate (2-1 ), an arm plate (2-2) extending outward is respectively provided on the left and right sides of the front end or the rear end of the base plate (2-1), and when the grinding wheel (1) and the grinding wheel holder (2) are assembled in place, the back plate (1-1) is connected to the inside of the installation groove (1-1a), and the arm plates (2-2) located on the left and right sides of the base plate (2-1) are correspondingly passed through the inside of two plug holes (1-1c) located on the left and right sides of the end plate (1-1b) and extend to the outside of the installation groove (1-1a), so The arm plate (2-2) is provided with a second plug hole (2-2b) and a third plug hole (2-2c) along the front-back direction, the anti-slip assembly comprises a block (3) and two n-shaped plug rods (4), the block (3) is located on the outer side of the end plate (1-1b), and through holes (3-1) are respectively provided at both ends of the block (3), the n-shaped plug rod (4) comprises an insert arm rod 1 (4-1) and an insert arm rod 2 (4-2), and the length of the insert arm rod 1 (4-1) is greater than the length of the insert arm rod 2 (4-2). One of the N-shaped plug rods (4) is plugged into the arm plate (2-2) located on the left side of the base plate (2-1), and the other N-shaped plug rod (4) is plugged into the arm plate (2-2) located on the right side of the base plate (2-1), and the first plug arm rod (4-1) is limitedly connected to the inside of the corresponding second plug hole (2-2b) through an elastic limit component that can be extended and retracted along the front-back direction, and the second plug arm rod (4-2) is connected to the corresponding through hole (3-1) on the stopper (3) and the corresponding third plug hole (2-2c).

2. The grinding subassembly assembly with convenient maintenance as claimed in claim 1, characterized in that: The arm plates (2-2) located on the left and right sides of the base plate (2-1) are provided with corresponding slots (2-2a) with openings facing the inside of the gap between the two. The third insertion hole (2-2c) penetrates the slot (2-2a) on the arm plate (2-2). The two ends of the stopper (3) are respectively embedded in the inside of the slot (2-2a) on the corresponding arm plate (2-2), and a gap is left between the left end face or the right end face of the stopper (3) and the vertical bottom face of the corresponding slot (2-2a).

3. The grinding subassembly assembly with convenient maintenance as claimed in claim 2, characterized in that: The end of the insert arm rod (4-1) is also milled with a step column (4-1b) extending coaxially along its length direction.

4. The grinding subassembly assembly with convenient maintenance as claimed in claim 3 is characterized in that: The second plug hole (2-2b) is a stepped hole structure that passes through the base plate (2-1), and the large diameter section of the second plug hole (2-2b) is located on the side of the base plate (2-1) away from the arm plate (2-2), and also includes an internal thread sleeve (C), the outer diameter of the internal thread sleeve (C) is less than the inner diameter of the large diameter section of the second plug hole (2-2b), the step column (4-1b) is provided with a threaded outer surface, the internal thread sleeve (C) is screwed and fixed on the step column (4-1b), and the end of the first arm rod (4-1) is also sleeved with a spring (5), one end of the spring (5) abuts on the step surface between the large diameter section and the small diameter section of the second plug hole (2-2b), and the other end abuts on the internal thread sleeve (C), and the spring (5), the large diameter section of the second plug hole (2-2b) and the internal thread sleeve (C) constitute the elastic limit assembly.

5. The grinding subassembly assembly with convenient maintenance as claimed in claim 4, characterized in that: The end of the internal thread sleeve (C) away from the spring (5) is provided with a hexagonal nut (C-1).

6. The grinding subassembly assembly with convenient maintenance as claimed in claim 5, characterized in that: The end of the hexagonal nut (C-1) is provided with a group of notched grooves located at both ends of the same diameter of its cross section, and a cotter pin (D) is inserted into the radial through hole (4-1c) at the end of the step column (4-1b), and the two ends of the cotter pin (D) extending out of the step column (4-1b) are correspondingly located inside the notched grooves of the hexagonal nut (C-1).

7. The grinding subassembly assembly with convenient maintenance as claimed in claim 4, characterized in that: An annular groove (4-1a) is provided on the inner side surface of the end of the large diameter section of the second plug hole (2-2b), and a retaining ring (B) is embedded in the annular groove (4-1a) for limiting the internal thread sleeve (C) to abut against the inside of the large diameter section of the second plug hole (2-2b).

8. The grinding subassembly assembly with convenient maintenance as claimed in claim 3, characterized in that: The second plug hole (2-2b) is a stepped hole structure penetrating the base plate (2-1), and the large diameter section of the second plug hole (2-2b) is located on the side of the base plate (2-1) away from the arm plate (2-2), the end of the first plug arm rod (4-1) is sleeved with a spring (5), and the step column (4-1b) is sleeved and fixed with a spring support seat (A), one end of the spring (5) abuts against the step surface between the large diameter section and the small diameter section of the second plug hole (2-2b), and the other end abuts against the spring support seat (A), and the spring (5), the large diameter section of the second plug hole (2-2b) and the spring support seat (A) constitute the elastic limit assembly.

9. The grinding subassembly assembly with convenient maintenance as claimed in claim 8, characterized in that: An annular groove (4-1a) is provided on the outer side surface of the end of the step column (4-1b), and a retaining ring (B) for limiting and abutting against the spring support seat (A) is embedded inside the annular groove (4-1a). The end of the spring support seat (A) away from the spring (5) is set as a countersunk groove structure, and the retaining ring (B) is embedded inside the countersunk groove of the spring support seat (A).

10. The grinding subassembly assembly with convenient maintenance as claimed in any one of claims 1 to 9, characterized in that: The stopper (3) has an ear block (3-2) extending upward to above the upper side of the base plate (2-1), and a weight-reducing hole (3-3) is provided on the ear block (3-2).

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