Grinding wheel dismounting and fastening tool

Abstract

The utility model relates to a grinding wheel dismounting and fastening tool which comprises a grinding spindle, a grinding wheel chuck arranged on the grinding spindle and a locking nut arranged on the grinding spindle, the grinding spindle is provided with a center hole, the grinding wheel dismounting and fastening tool further comprises an inner tensioning shaft and an outer sleeve arranged on the outer side of the inner tensioning shaft in a sleeving mode, and the front end and the rear end of the outer sleeve are provided with a sleeve and a first hexagonal section respectively. A plurality of clamping plates are evenly distributed on the inner side of the sleeve in the circumferential direction of the sleeve, and clamping grooves matched with the clamping plates are formed in the outer side of the locking nut in the circumferential direction of the locking nut. A tensioning sleeve and a second hexagonal section are arranged at the front end and the rear end of the inner tensioning shaft respectively, the tensioning sleeve can stretch into the center hole, a conical hole is formed in the tensioning sleeve, a plurality of tensioning grooves distributed in the length direction of the tensioning sleeve are formed in the outer wall of the tensioning sleeve at intervals, a screw is arranged in the inner tensioning shaft in a threaded and penetrating mode, and a tensioning nut is arranged at the position, located at the end of the second hexagonal section, of the screw. And a conical head matched with the tensioning sleeve is arranged on the screw rod. According to the device, the grinding wheel can be quickly disassembled and fastened, the working efficiency is greatly improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly and fastening of grinding wheels, in particular to a tool for disassembly and fastening of grinding wheels. Background Art

[0002] The flexible grinding wheel on a rail milling vehicle needs to be quickly replaced. Existing grinding wheels are fixed to the grinding spindle and rotate with it. To ensure a secure connection between the grinding wheel and the grinding spindle, a grinding wheel chuck is designed to clamp the grinding wheel and mate with the grinding spindle. The end of the grinding spindle is threaded with a locknut to secure the grinding wheel chuck to the grinding wheel. When replacing the grinding wheel, a tool is required to remove this locknut to remove the grinding wheel. However, the grinding wheel and spindle rotate simultaneously. Traditional tools, whether using a socket or a dedicated locknut wrench, rotate the locknut and grinding wheel simultaneously, preventing direct removal. Two people are required to secure the grinding wheel and spindle while another person removes the wheel using traditional tools, which is time-consuming and laborious. Furthermore, the grinding wheel is covered by a protective shield, which prevents a torque wrench from reaching inside. Furthermore, traditional removal tools cannot be used in conjunction with torque wrenches, making it impossible to verify the tightening torque of the locknut. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a grinding wheel disassembly and fastening tool.

[0004] The cam is secured to the inner wall of the inner shaft with a plurality of holes, each of which is adapted to engage the first end of the inner sleeve and engage with the second end of the inner sleeve.

[0005] Furthermore, the first hexagonal section is a first hexagonal nut, and the second hexagonal section is a second hexagonal nut.

[0006] Furthermore, a plurality of ribs are provided on the outer wall of the sleeve along its circumference, and the ribs are located between the sleeve and the first hexagonal section.

[0007] Furthermore, the clamping plate is made of 45 steel, and the hardness of the clamping plate is HRC45-48.

[0008] Furthermore, the inner tensioning shaft has a threaded hole for engaging with a screw rod.

[0009] Furthermore, the tapered hole has a large end and a small end, the tapered hole is connected to the threaded hole, the small end of the tapered hole faces the threaded hole, and the large end faces outward.

[0010] Furthermore, the first wrench is a torque wrench.

[0011] The beneficial effects of the present application are as follows: 1. The clamping plate of the present application is inserted into the clamping groove of the locking nut. By screwing the tensioning nut, the screw moves outward, thereby causing the conical head to move toward the small end of the conical hole, so that the inner diameter of the end of the tensioning sleeve becomes larger, and the inner tensioning shaft and the main shaft are fixed together. Then, only one person needs to cooperate with the first wrench and the second wrench to quickly loosen or lock the locking nut, thereby quickly realizing the disassembly and tightening of the grinding wheel, which greatly improves work efficiency and reduces the labor intensity of workers.

[0012] 2. The pallet of this application is made of 45 steel with a hardness of HRC45-48 and good wear resistance, thus ensuring that the pallet can be used frequently and repeatedly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is an axonometric drawing of the present invention.

[0015] Markings in the figure: 1. Grinding spindle, 11. Center hole, 2. Grinding wheel chuck, 3. Locking nut, 4. Outer sleeve, 41. First hexagonal section, 42. Sleeve, 421. Clamping plate, 43. Rib, 5. Inner tensioning shaft, 51. Second hexagonal section, 52. Tensioning sleeve, 521. Conical hole, 522. Tensioning groove, 6. Screw, 61. Conical head, 62. Tensioning nut, 7. First wrench, 8. Second wrench, 9. Grinding wheel. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that in the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] See also Figure 1-2 The embodiment of the utility model provides a grinding wheel disassembly and tightening tool, including a grinding spindle 1, a grinding wheel chuck 2 provided on the grinding spindle 1 for clamping the grinding wheel 9, and a locking nut 3 provided on the grinding spindle 1 for locking the grinding wheel chuck 2. The grinding spindle 1 has a center hole 11, and also includes an inner tensioning shaft 5 and an outer sleeve 4 sleeved on the outer side of the inner tensioning shaft 5. The front and rear ends of the outer sleeve 4 are respectively provided with a sleeve 42 and a first hexagonal section 41 capable of cooperating with the first wrench 7. The inner side of the sleeve 42 is evenly distributed with a plurality of clamping plates 421 along its circumference. The outer side of the locking nut 3 is provided with a plurality of clamping plates 421 along its circumference. A card slot is provided along its circumference for cooperating with the card plate 421; a tensioning sleeve 52 and a second hexagonal section 51 that can cooperate with the second wrench 8 are respectively provided at the front and rear ends of the inner tensioning shaft 5, the tensioning sleeve 52 can extend into the center hole 11, and a tapered hole 521 is provided in the tensioning sleeve 52. A plurality of tensioning grooves 522 distributed along the length direction of the tensioning sleeve 52 are provided on the outer wall of the tensioning sleeve 52 at intervals, and a screw rod 6 is passed through the internal thread of the inner tensioning shaft 5. A tensioning nut 62 is provided on the end of the second hexagonal section 51 on the screw rod 6, and a tapered head 61 that cooperates with the tensioning sleeve 52 is provided on the screw rod 6.

[0018] Among them, the outer sleeve 4 and the inner tensioning shaft 5 can rotate relative to each other, there are two grinding wheel chucks 2, and the grinding wheel 9 is located between the two grinding wheel chucks 2. The grinding spindle 1 has a threaded section that cooperates with the locking nut 3. By tightening the locking nut 3, the two grinding wheel chucks 2 are brought close to each other to lock the grinding wheel 9. The locking nut 3 is unscrewed from the grinding spindle 1, and the two grinding wheel chucks 2 can be removed from the grinding spindle 1 to realize the disassembly of the grinding wheel 9. This is the existing technology and this application will not describe it in detail.

[0019] Specifically, the locking nut 3 adopts the existing precision R-type radial locking nut, or adopts the R-type nut in the existing patent CN216343319U. The inner diameter of the sleeve 42 is larger than the outer diameter of the locking nut 3. The card plate 421 has a guide portion extending outward from the sleeve 42. The guide portion is provided with an extension portion extending radially outward along the sleeve 42. The first hexagonal section 41 is the first hexagonal nut. The first hexagonal nut has a first internal threaded hole, and the first internal threaded hole is coaxially arranged with the outer sleeve 4. The second hexagonal section 51 is the second hexagonal nut. The second hexagonal nut has a second internal threaded hole, and the second internal threaded hole is threadedly matched with the screw 6. The card plate 421 is made of 45 steel. The hardness of the card plate 421 is HRC45-48, and the wear resistance is good, thereby ensuring that the card plate can be used frequently and repeatedly. It should be noted that the parts not described in detail in this application are all prior art.

[0020] In addition, the inner tensioning shaft 5 has a threaded hole for the screw rod 6. The tapered hole 521 has a large end and a small end, and the tapered hole 521 is connected to the threaded hole, with the small end facing the threaded hole and the large end facing outward.

[0021] When the grinding wheel 9 needs to be removed, the clamping plate 421 in the sleeve 42 is engaged with the slot in the lock nut 3, allowing the tension sleeve 52 to extend into the center hole 11 of the grinding spindle 1. The tension nut is then turned, causing the screw to move outward, thereby causing the tapered head 61 to move toward the small end of the tapered hole 521, increasing the inner diameter of the end of the tension sleeve 52, thereby securing the inner tension shaft 5 to the grinding spindle 1. The second hexagonal nut on the inner tension shaft 5 is then secured with the second wrench 8 to secure the grinding spindle 1. At this point, the second hexagonal nut on the outer sleeve 4 is then turned with the first wrench 7, which can easily drive the lock nut 3 to rotate, thereby loosening the lock nut 3 and removing the grinding wheel 3. Similarly, when tightening, after securing the inner tension shaft 5 to the grinding spindle 1, the second hexagonal nut is then tightened in the opposite direction with the first wrench 7 to tighten the lock nut 3, securing the grinding wheel 3. The present application can quickly loosen or lock the locking nut 3, thereby quickly disassembling and tightening the grinding wheel 9, greatly improving work efficiency and reducing the labor intensity of workers.

[0022] During tightening, the first wrench 7 is a torque wrench. By providing the outer sleeve 4, the sleeve 42, and the first hexagonal section 41, the tightening point of the lock nut 3, which was originally inside the protective cover, is extended to the outside of the protective cover. The torque wrench can be easily used in conjunction with the first hexagonal nut of the sleeve 42, visualizing and digitizing the tightening torque of the lock nut 3. When tightening, the lock nut 3 reaches the predetermined tightening torque, thereby ensuring the safety and reliability of the grinding wheel during operation.

[0023] Of course, the present invention is not limited to the above-described embodiments. Several other embodiments based on the design concept of the present invention are provided below.

[0024] For example, in other embodiments, different from the above-described embodiments, a plurality of ribs 43 are provided on the outer wall of the sleeve 42 along its circumference, and the ribs 43 are located between the sleeve 42 and the first hexagonal segment 41 .

[0025] It should be noted that the above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. A grinding wheel disassembly and fastening tool, comprising a grinding spindle (1), a grinding wheel chuck (2) arranged on the grinding spindle (1) for clamping a grinding wheel (9), and a locking nut (3) arranged on the grinding spindle (1) for locking the grinding wheel chuck (2), wherein the grinding spindle (1) has a center hole (11), and is characterized in that: The invention also includes an inner tensioning shaft (5) and an outer sleeve (4) sleeved on the outer side of the inner tensioning shaft (5), wherein the front and rear ends of the outer sleeve (4) are respectively provided with a sleeve (42) and a first hexagonal section (41) capable of cooperating with the first wrench (7), the inner side of the sleeve (42) is uniformly provided with a plurality of clamping plates (421) along its circumference, and the outer side of the locking nut (3) is provided with a clamping groove cooperating with the clamping plate (421) along its circumference; the front and rear ends of the inner tensioning shaft (5) are respectively provided with a tensioning sleeve (52) and a first hexagonal section (41) capable of cooperating with the second wrench (8), The second hexagonal section (51) and the tightening sleeve (52) can be extended into the center hole (11). The tightening sleeve (52) is provided with a tapered hole (521). The outer wall of the tightening sleeve (52) is provided with a plurality of tightening grooves (522) distributed along the length direction of the tightening sleeve (52). The inner thread of the inner tightening shaft (5) is penetrated by a screw rod (6). The screw rod (6) is provided with a tightening nut (62) at the end of the second hexagonal section (51). The screw rod (6) is provided with a tapered head (61) that matches the tightening sleeve (52).

2. The grinding wheel disassembly and fastening tool according to claim 1, characterized in that: The first hexagonal section (41) is a first hexagonal nut, and the second hexagonal section (51) is a second hexagonal nut.

3. The grinding wheel disassembly and fastening tool according to claim 1, characterized in that: A plurality of ribs (43) are provided on the outer wall of the sleeve (42) along its circumference, and the ribs (43) are located between the sleeve (42) and the first hexagonal section (41).

4. The grinding wheel disassembly and fastening tool according to claim 1, characterized in that: The clamping plate (421) is made of 45 steel, and the hardness of the clamping plate (421) is HRC45-48.

5. The grinding wheel disassembly and fastening tool according to claim 1, characterized in that: The inner tensioning shaft (5) has a threaded hole in it for matching with the screw rod (6).

6. The grinding wheel disassembly and fastening tool according to claim 5, characterized in that: The tapered hole (521) has a large end and a small end. The tapered hole (521) is connected to the threaded hole. The small end of the tapered hole (521) faces the threaded hole, and the large end faces outward.

7. The grinding wheel disassembly and fastening tool according to claim 1, characterized in that: The first wrench (7) is a torque wrench.

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