Novel polishing tool capable of effectively fixing bearing cover

Abstract

The utility model relates to a novel polishing tool capable of effectively fixing a bearing cover, and belongs to the technical field of bearing cover polishing. Comprising a base, the base is provided with multiple sets of through holes C arranged in a matrix mode, the base is provided with a limiting assembly A and a limiting assembly B which limit a bearing cover to move in the horizontal direction, the limiting assembly A and the limiting assembly B are detachably installed in the corresponding through holes C, and the limiting assembly A and the limiting assembly B are arranged along the outer contour of the bearing cover. The base is further symmetrically provided with a plurality of sets of vertical through holes A arranged at intervals, the through holes A are distributed in the periphery of the through hole C, a set of connecting parts capable of being rapidly locked and rapidly unlocked is installed in each set of through holes A, and the base is detachably installed on the workbench through the multiple sets of connecting parts. The polishing tool has the beneficial effects that the locking assembly is arranged on the base, so that the polishing tool is rapidly mounted and dismounted; the detachable limiting assembly A and the detachable limiting assembly B are arranged on the base, so that the bearing cover is effectively fixed, and the bearing cover is prevented from sliding in the polishing process; and meanwhile, the mounting positions of the limiting rods and the limiting blocks can be adjusted according to the shapes of the bearing caps, so that the polishing tool is suitable for placing various bearing caps with different boundary dimensions, and the practicability of the polishing tool is improved.

Description

Technical Field

[0001] The utility model relates to a novel grinding tool which can effectively fix a bearing cover and belongs to the technical field of grinding bearing covers. Background Art

[0002] Split radial sliding bearings are also called split sliding bearings, which are composed of bearing seats, bearing caps, split bearing shells and studs. The bearing cap is an important part of the bearing. During the casting process of the bearing cap, many burrs will be generated. In order not to affect the use of the bearing, these burrs on the bearing cap need to be polished. Due to the small size and irregular shape of the bearing cap, there is a risk of the bearing cap being difficult to fix and easy to slide during the polishing process. Therefore, how to effectively fix the bearing cap to prevent the bearing cap from sliding during the polishing process is of vital importance to safe production.

[0003] After searching, the patent application with application number 202321638549.4 discloses a grinding device for bearing cover processing, including a base plate, a pillar is fixedly installed on the top of the base plate, a bearing is fixedly installed on the inner wall of the pillar, a first threaded rod is fixedly installed on the inner wall of the inner ring of the bearing, a threaded sleeve is spirally connected to the surface of the first threaded rod, a support block is fixedly installed on one side of the threaded sleeve, and a protective cover is fixedly installed on one side of the support block.

[0004] Although the above patent can achieve the purpose of grinding and removing chips at the same time, the current technical considerations are not comprehensive and have the following disadvantages: the bearing cover is placed in a fixing groove to fix the bearing cover, the structure of the fixing groove is relatively simple, and the bearing cover of the split radial sliding bearing cannot be effectively fixed. There is a risk that the bearing cover is easy to slip during the grinding process. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: how to achieve effective fixation of the bearing cover by setting a limit assembly on the grinding tool to prevent the bearing cover from sliding during the grinding process, and at the same time set a locking assembly on the grinding tool to achieve rapid installation and disassembly of the grinding tool. For this purpose, a new type of grinding tool that can effectively fix the bearing cover is provided.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The utility model describes a new type of grinding tool that can effectively fix the bearing cover, characterized in that it includes a base, the base is provided with a plurality of groups of through holes C arranged in a matrix, the base is provided with a limit component A and a limit component B for limiting the horizontal movement of the bearing cover, the limit component A and the limit component B are detachably installed in the corresponding through hole C, the limit component A and the limit component B are arranged along the outer contour of the bearing cover, the base is also symmetrically provided with a plurality of groups of vertical and spaced through holes A, the through holes A are distributed on the periphery of the through hole C, each group of through holes A is respectively provided with a group of connecting components that can be quickly locked and quickly unlocked, and the base is detachably mounted on the workbench through the plurality of groups of connecting components.

[0008] Preferably, the limit assembly A includes multiple groups of symmetrically arranged cylindrical limit rods, which are respectively abutted against the inner ring and outer ring of the bearing cover, and the limit assembly B includes two groups of symmetrically arranged L-shaped limit blocks, which are respectively abutted against the lower left and lower right parts of the bearing cover to limit the movement of the bearing cover in the horizontal direction. The limit rods and limit blocks can be detachably installed in the corresponding through holes C, and the bottom end of the limit rod is provided with a pin rod A that is interference fit with the through hole C, and the bottom end of the limit block is provided with multiple groups of pin rods B that are interference fit with the through hole C. The installation position of the limit rod and the limit block can be adjusted according to the shape of the bearing cover to be suitable for placing bearing covers of different sizes.

[0009] Preferably, the connecting component is a locking mechanism, which includes a pin sleeve, an elastic unit and a pin body. The pin sleeve passes through the through hole A and is installed in the pin hole corresponding to the workbench. The outer wall of the upper part of the pin sleeve is interference fit with the through hole A. The inner hole of the pin sleeve is a stepped through hole B. The middle part of the through hole B is provided with an upward step surface. The lower part of the pin sleeve is provided with multiple groups of mounting holes connected with the through hole B. The multiple groups of mounting holes are arranged at equal intervals around the center line of the through hole B. A steel ball is installed in the mounting hole, and a corresponding steel ball is provided in the pin hole. An annular groove, the pin body passes through the limit ring, the limit sleeve, the elastic unit and the through hole B from top to bottom in sequence. The pin body, the limit ring and the through hole B are all clearance fits, the pin body and the limit sleeve are interference fits, the limit ring is fixedly set at the upper end of the through hole B, the limit sleeve abuts against the limit ring, one end of the elastic unit abuts against the limit sleeve, and the other end of the elastic unit abuts against the step surface, providing an upward thrust for the limit sleeve, a pin head is fixedly set at the top end of the pin body, and an hourglass-shaped pin tail that cooperates with the steel ball is fixedly set at the bottom end of the pin body.

[0010] Preferably, the pin tail includes a first shaft section, a second shaft section, a third shaft section, a fourth shaft section and a fifth shaft section which are coaxially arranged from top to bottom, the first shaft section and the fifth shaft section are both convex annular grooves, and are clearance-matched with the through hole B, the second shaft section is a truncated cone with a larger upper portion and a smaller lower portion, the third shaft section is a concave annular groove, the fourth shaft section is a truncated cone with a smaller upper portion and a larger lower portion, and the second shaft section, the third shaft section and the fourth shaft section are connected to form a groove for accommodating a steel ball. When the pin tail moves downward, the steel ball is sequentially pushed out by the second shaft section and the first shaft section, so that the first shaft section abuts against the bottom of the steel ball, and the pin shaft body and the steel ball are interference-matched. At this time, the steel ball is stuck at the connection between the pin shaft body and the first shaft section to limit the pin shaft body from moving upward under the action of the elastic unit.

[0011] Preferably, the through hole B includes a first inner hole and a second inner hole coaxially arranged from top to bottom, the diameter of the first inner hole is larger than that of the second inner hole, the step surface is located at the connection between the first inner hole and the second inner hole, the limit ring is fixedly arranged at the upper end of the first inner hole, the outer wall of the limit sleeve is clearance matched with the first inner hole, and the pin shaft body, the first shaft section and the fifth shaft section are all clearance matched with the second inner hole.

[0012] Preferably, multiple groups of mounting holes are arranged at equal intervals around the center line of the second inner hole, the mounting holes are connected to the second inner hole, corresponding steel balls are installed in the mounting holes, the diameter of the outer opening of the mounting holes is smaller than the diameter of the steel balls to prevent the steel balls from falling out of the pin sleeve, and the diameter of the inner opening of the mounting holes is larger than the diameter of the steel balls to facilitate the steel balls to roll into the groove of the pin tail.

[0013] Preferably, an embedded pull ring is provided at the top of the pin head to facilitate rapid upward pulling of the pin head.

[0014] Preferably, the elastic unit is a spring, the spring sleeve is arranged on the pin shaft body, the top end of the spring abuts against the lower surface of the limiting sleeve, and the bottom end of the spring abuts against the step surface.

[0015] Preferably, the through holes A and the locking mechanisms are each in four groups, the four groups of through holes A are distributed at the four corners of the grinding tool, and the four groups of locking mechanisms are correspondingly installed in the four groups of through holes A.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a novel grinding tool which can effectively fix the bearing cover. By arranging a limit component A and a limit component B on the base, the bearing cover is effectively fixed to prevent the bearing cover from sliding during the grinding process, thereby improving the safety of the grinding work. By arranging a locking component on the base, the grinding tool can be quickly installed and disassembled, which is convenient for later maintenance and replacement.

[0018] The utility model discloses a novel grinding tool which can effectively fix the bearing cover, wherein the limit rod and the limit block are detachably mounted on the base, so that the mounting positions of the limit rod and the limit block can be adjusted according to the shape of the bearing cover, so as to be suitable for placing bearing covers with various shapes and sizes, thereby improving the practicability of the grinding tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 This is a front sectional view of the utility model (the locking mechanism is in the unlocked state);

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 3 This is a front sectional view of the utility model (the locking mechanism is in a locked state);

[0023] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0024] Figure 5 It is a top view of the utility model;

[0025] Figure 6 It is a left view of the utility model;

[0026] Figure 7 It is a schematic diagram of the fixed bearing cover of the utility model;

[0027] Figure 8 A schematic diagram of the structure of the base.

[0028] In the figure: 1, base 2, through hole A 3, locking mechanism 4, pin sleeve 5, pin body 6, through hole B 7, step surface 8, mounting hole 9, steel ball 10, limit ring 11, limit sleeve 12, pin head 13, pin tail 14, bearing cover 15, limit assembly A16, limit assembly B 17, first shaft section 18, second shaft section 19, third shaft section 20, fourth shaft section 21, fifth shaft section 22, through hole C 23, limit rod 24, limit block 25, pin A 26, pin B 27, first inner hole 28, second inner hole 29, spring 30, pull ring 31, workbench 32, pin hole 33, annular groove. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings:

[0030] The present invention is further described below through specific embodiments, but is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0031] Embodiment 1, as Figure 3-8 As shown, the novel grinding tool that can effectively fix the bearing cover includes a base 1, and the base 1 is provided with a plurality of through holes C22 arranged in a matrix. The base 1 is provided with a limit assembly A15 and a limit assembly B16 for limiting the horizontal movement of the bearing cover 14. The limit assembly A15 and the limit assembly B16 are detachably installed in the corresponding through holes C22. The limit assembly A15 and the limit assembly B16 are arranged along the outer contour of the bearing cover 14. The limit assembly A15 and the limit assembly B16 can be adjusted according to the shape of the bearing cover 14. The installation position of the limit component B16 on the base 1, the base 1 is also symmetrically provided with multiple groups of vertical and spaced through holes A2, the through holes A2 are distributed on the periphery of the through hole C22, and each group of through holes A2 is respectively installed with a group of connecting parts that can be quickly locked and quickly unlocked. The base 1 is detachably installed on the workbench 31 through the multiple groups of connecting parts, and the base 1 is quickly installed on the workbench 31 by quickly locking the connecting parts, and the base 1 is quickly removed from the workbench 31 by quickly unlocking the connecting parts.

[0032] Furthermore, the limit assembly A15 includes multiple groups of symmetrically arranged cylindrical limit rods 23, which respectively abut against the inner ring and outer ring of the bearing cover 14. The limit assembly B16 includes two groups of symmetrically arranged L-shaped limit blocks 24, which respectively abut against the lower left and lower right parts of the bearing cover 14 to limit the horizontal movement of the bearing cover 14. The limit rods 23 and the limit blocks 24 can be detachably installed in the corresponding through holes C22. The bottom end of the limit rod 23 is provided with a pin rod A25 that is interference fit with the through hole C22, and the bottom end of the limit block 24 is provided with multiple groups of pin rods B26 that are interference fit with the through hole C22. The installation position of the limit rod 23 and the limit block 24 can be adjusted according to the shape of the bearing cover to be suitable for placing bearing covers of different sizes.

[0033] Embodiment 2, as Figure 1-8As shown, a new type of grinding tool that can effectively fix the bearing cover includes a base 1, and the base 1 is provided with a plurality of groups of through holes C22 arranged in a matrix, and the base 1 is provided with a limit component A15 and a limit component B16 for limiting the horizontal movement of the bearing cover 14, and the limit component A15 and the limit component B16 are detachably installed in the corresponding through hole C22, and the limit component A15 and the limit component B16 are arranged along the outer contour of the bearing cover 14. The base 1 is also symmetrically provided with a plurality of groups of vertical and spaced through holes A2, and the through holes A2 are distributed on the periphery of the through hole C22, and each group of through holes A2 is respectively installed with a group of connecting components that can be quickly locked and quickly unlocked, and the base 1 is detachably mounted on the workbench 31 through the plurality of connecting components.

[0034] Furthermore, the limit assembly A15 includes multiple groups of symmetrically arranged cylindrical limit rods 23, which respectively abut against the inner ring and outer ring of the bearing cover 14. The limit assembly B16 includes two groups of symmetrically arranged L-shaped limit blocks 24, which respectively abut against the lower left and lower right parts of the bearing cover 14 to limit the horizontal movement of the bearing cover 14. The limit rods 23 and the limit blocks 24 can be detachably installed in the corresponding through holes C22. The bottom end of the limit rod 23 is provided with a pin rod A25 that is interference fit with the through hole C22, and the bottom end of the limit block 24 is provided with multiple groups of pin rods B26 that are interference fit with the through hole C22. The installation position of the limit rod 23 and the limit block 24 can be adjusted according to the shape of the bearing cover to be suitable for placing bearing covers of different sizes.

[0035] Further, the connecting component is a locking mechanism 3, which includes a pin sleeve 4, an elastic unit and a pin body 5. The pin sleeve 4 passes through the through hole A2 and is installed in the pin hole 32 corresponding to the workbench 31. The outer wall of the upper part of the pin sleeve 4 is interference fit with the through hole A2. The inner hole of the pin sleeve 4 is a stepped through hole B6. The middle part of the through hole B6 is provided with an upward step surface 7. The lower part of the pin sleeve 4 is provided with multiple groups of mounting holes 8 connected with the through hole B6. The multiple groups of mounting holes 8 are arranged at equal intervals around the center line of the through hole B6. A steel ball 9 is installed in the mounting hole 8, and an annular groove 3 corresponding to the steel ball 9 is provided in the pin hole 32. 3. The pin body 5 passes through the limit ring 10, the limit sleeve 11, the elastic unit and the through hole B6 from top to bottom in sequence. The pin body 5, the limit ring 10 and the through hole B6 are all clearance fits, the pin body 5 and the limit sleeve 11 are interference fits, the limit ring 10 is fixedly set at the upper end of the through hole B6, the limit sleeve 11 abuts against the limit ring 10, one end of the elastic unit abuts against the limit sleeve 11, and the other end of the elastic unit abuts against the step surface 7, providing an upward thrust for the limit sleeve 11, the top of the pin body 5 is fixedly provided with a pin head 12, and the bottom end of the pin body 5 is fixedly provided with an hourglass-shaped pin tail 13 that cooperates with the steel ball 9.

[0036] Furthermore, the pin tail 13 includes a first shaft segment 17, a second shaft segment 18, a third shaft segment 19, a fourth shaft segment 20 and a fifth shaft segment 21 which are coaxially arranged from top to bottom. The first shaft segment 17 and the fifth shaft segment 21 are both convex annular grooves and are clearance-matched with the through hole B6. The second shaft segment 18 is a frustum of a cone that is larger at the top and smaller at the bottom. The third shaft segment 19 is a concave annular groove. The fourth shaft segment 20 is a frustum of a cone that is smaller at the top and larger at the bottom. The second shaft segment 18, the third shaft segment 19 and the fourth shaft segment 20 are connected to form a groove for accommodating the steel ball 9. By pressing the pin head 12 downward, the pin tail 13 is pushed downward. During the downward movement of the pin tail 13, the steel ball 9 is successively pushed out by the second shaft segment 18 and the first shaft segment 17, so that the first shaft segment 17 abuts against the bottom of the steel ball 9. The pin shaft body 5 and the steel ball 9 have an interference fit. At this time, the steel ball 9 is stuck at the connection between the pin shaft body 5 and the first shaft segment 17 to limit the upward movement of the pin shaft body 5 under the action of the elastic unit, thereby realizing the rapid locking of the locking mechanism 3.

[0037] Furthermore, the through hole B6 includes a first inner hole 27 and a second inner hole 28 which are coaxially arranged from top to bottom, the diameter of the first inner hole 27 is larger than that of the second inner hole 28, the step surface 7 is located at the connection between the first inner hole 27 and the second inner hole 28, the limit ring 10 is fixedly arranged at the upper end of the first inner hole 27, the outer wall of the limit sleeve 11 is clearance-matched with the first inner hole 27, and the pin shaft body 5, the first shaft section 17 and the fifth shaft section 21 are all clearance-matched with the second inner hole 28.

[0038] Furthermore, multiple groups of the mounting holes 8 are arranged at equal intervals around the center line of the second inner hole 28, the mounting holes 8 are connected to the second inner hole 28, corresponding steel balls 9 are installed in the mounting holes 8, the diameter of the outer opening of the mounting holes 8 is smaller than the diameter of the steel balls 9, so as to prevent the steel balls 9 from falling out of the pin sleeve 4, and the diameter of the inner opening of the mounting holes 8 is larger than the diameter of the steel balls 9, so as to facilitate the steel balls 9 to roll into the groove of the pin tail 13.

[0039] Furthermore, an embedded pull ring 30 is provided at the top of the pin head 12 to facilitate the rapid upward pulling of the pin head 12 .

[0040] Furthermore, the elastic unit is a spring 29 , which is sleeved on the pin shaft body 5 , with the top end of the spring 29 abutting against the lower surface of the limiting sleeve 11 , and the bottom end of the spring 29 abutting against the step surface 7 .

[0041] Embodiment 3 is different from Embodiment 2 in that the through holes A2 and the locking mechanisms 3 are each in four groups, the four groups of through holes A2 are distributed at the four corners of the grinding tool, and the four groups of locking mechanisms 3 are correspondingly installed in the four groups of through holes A2.

[0042] The working principle of this utility model:

[0043] When there is no external force, the steel ball 9 is located in the groove of the pin tail 13. At this time, the steel ball 9 is not pushed out, and the steel ball 9 does not protrude outside the pin shaft sleeve 4. At this time, the locking mechanism 3 is in an unlocked state.

[0044] By pressing the pin head 12 downward, the pin shaft body 5, the pin tail 13 and the limiting sleeve 11 are pushed downward, the spring 29 is compressed by the limiting sleeve 11, and the pin tail 13 pushes part of the steel ball 9 out of the pin shaft sleeve 4, so that the first shaft section 17 abuts against the bottom of the steel ball 9, and the pin shaft body 5 and the steel ball 9 have an interference fit. At this time, the steel ball 9 is stuck in the connection between the pin shaft body 5 and the first shaft section 17, which limits the pin shaft body 5 from moving upward under the action of the spring 29, so that the locking mechanism 3 is in a locked state, and at the same time, the part of the steel ball 9 that is pushed out is stuck in the annular groove 33, so that the grinding tooling can be quickly installed in the corresponding pin shaft hole 32 on the workbench 31.

[0045] When the grinding tool needs to be removed, the pin head 12 is pulled upward to drive the pin shaft body 5, the pin tail 13 and the limit sleeve 11 to move upward, the spring 29 is extended, the limit sleeve 11 abuts against the limit ring 10, and the steel ball 9 rolls into the groove of the pin tail 13. At this time, the steel ball 9 returns to its original state without being ejected, and the locking mechanism 3 returns to the unlocked state, so that the grinding tool can be quickly removed from the workbench 31.

[0046] The utility model discloses a novel grinding tool capable of effectively fixing a bearing cover. By arranging a limit assembly A and a limit assembly B on a base, the bearing cover is effectively fixed to prevent the bearing cover from sliding during the grinding process, thereby improving the safety of the grinding work.

[0047] The utility model discloses a novel grinding tool which can effectively fix the bearing cover, wherein the limit rod and the limit block are detachably mounted on the base, so that the mounting positions of the limit rod and the limit block can be adjusted according to the shape of the bearing cover, so as to be suitable for placing bearing covers with various shapes and sizes, thereby improving the practicability of the grinding tool.

[0048] The utility model discloses a novel grinding tool capable of effectively fixing a bearing cover. By arranging a locking component on a base, the grinding tool can be quickly installed and disassembled, which is convenient for later maintenance and replacement.

[0049] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the present utility model is defined by the attached claims and their equivalents.

[0050] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A new type of grinding tool that can effectively fix the bearing cover, characterized in that: The invention comprises a base (1), wherein the base (1) is provided with a plurality of groups of through holes (22) arranged in a matrix, wherein the base (1) is provided with a limit assembly A (15) and a limit assembly B (16) for limiting the horizontal movement of a bearing cover (14), wherein the limit assembly A (15) and the limit assembly B (16) are detachably mounted in corresponding through holes C (22), wherein the limit assembly A (15) and the limit assembly B (16) are arranged along the outer contour of the bearing cover (14), wherein the base (1) is further symmetrically provided with a plurality of groups of vertical through holes A (2) arranged at intervals, wherein the through holes A (2) are distributed around the periphery of the through holes C (22), wherein each group of through holes A (2) is respectively provided with a group of connection components capable of being quickly locked and quickly unlocked, and wherein the base (1) is detachably mounted on a workbench (31) via the plurality of groups of connection components.

2. According to claim 1, a new type of grinding tool that can effectively fix the bearing cover is characterized in that: The limiting assembly A (15) comprises a plurality of groups of symmetrically arranged cylindrical limiting rods (23), the plurality of groups of limiting rods (23) respectively abutting against the inner ring and the outer ring of the bearing cover (14); the limiting assembly B (16) comprises two groups of symmetrically arranged L-shaped limiting blocks (24), the two groups of limiting blocks (24) respectively abutting against the lower left part and the lower right part of the bearing cover (14); the limiting rods (23) and the limiting blocks (24) are both detachably mounted in the corresponding through holes C (22); the bottom end of the limiting rod (23) is provided with a pin rod A (25) which is interference fit with the through hole C (22); and the bottom end of the limiting block (24) is provided with a plurality of groups of pin rods B (26) which are interference fit with the through hole C (22).

3. According to claim 2, a new type of grinding tool that can effectively fix the bearing cover is characterized in that: The connecting component is a locking mechanism (3), which comprises a pin sleeve (4), an elastic unit and a pin body (5). The pin sleeve (4) passes through the through hole A (2) and is installed in a pin hole (32) corresponding to the workbench (31). The outer wall of the upper part of the pin sleeve (4) is interference fit with the through hole A (2). The inner hole of the pin sleeve (4) is a stepped through hole B (6). The middle part of the through hole B (6) is provided with an upward step surface (7). The lower part of the pin sleeve (4) is provided with a plurality of mounting holes (8) connected to the through hole B (6). The plurality of mounting holes (8) are arranged at equal intervals around the center line of the through hole B (6). A steel ball (9) is installed in the mounting hole (8). The pin hole (32) is provided with an annular groove (33) corresponding to the steel ball (9). 3), the pin shaft body (5) passes through the limit ring (10), the limit sleeve (11), the elastic unit and the through hole B (6) in sequence from top to bottom, the pin shaft body (5) and the limit ring (10) and the through hole B (6) are all clearance fit, the pin shaft body (5) and the limit sleeve (11) are interference fit, the limit ring (10) is fixedly arranged at the upper end of the through hole B (6), the limit sleeve (11) is in contact with the limit ring (10), one end of the elastic unit is in contact with the limit sleeve (11), and the other end of the elastic unit is in contact with the step surface (7), providing an upward thrust for the limit sleeve (11), the top end of the pin shaft body (5) is fixedly provided with a pin head (12), and the bottom end of the pin shaft body (5) is fixedly provided with an hourglass-shaped pin tail (13) that cooperates with the steel ball (9).

4. According to claim 3, a new type of grinding tool capable of effectively fixing the bearing cover is characterized in that: The pin tail (13) comprises a first shaft section (17), a second shaft section (18), a third shaft section (19), a fourth shaft section (20) and a fifth shaft section (21) which are coaxially arranged in sequence from top to bottom. The first shaft section (17) and the fifth shaft section (21) are both convex annular grooves and are clearance-matched with the through hole B (6). The second shaft section (18) is a truncated cone with a larger upper portion and a smaller lower portion. The third shaft section (19) is a concave annular groove. The fourth shaft section (20) is a truncated cone with a smaller upper portion and a larger lower portion. The second shaft section (18), the third shaft section (19) and the fourth shaft section (20) are connected to form a groove for accommodating the steel ball (9).

5. A new type of grinding tool capable of effectively fixing the bearing cover according to claim 4, characterized in that: The through hole B (6) comprises a first inner hole (27) and a second inner hole (28) which are coaxially arranged in sequence from top to bottom, the diameter of the first inner hole (27) is larger than that of the second inner hole (28), the step surface (7) is located at the connection between the first inner hole (27) and the second inner hole (28), the limit ring (10) is fixedly arranged at the upper end of the first inner hole (27), the outer wall of the limit sleeve (11) is clearance-matched with the first inner hole (27), and the pin shaft body (5), the first shaft section (17) and the fifth shaft section (21) are clearance-matched with the second inner hole (28).

6. A new type of grinding tool capable of effectively fixing the bearing cover according to claim 5, characterized in that: A plurality of groups of mounting holes (8) are arranged at equal intervals around the center line of the second inner hole (28); the mounting holes (8) are connected to the second inner hole (28); corresponding steel balls (9) are installed in the mounting holes (8); the diameter of the outer opening of the mounting holes (8) is smaller than the diameter of the steel balls (9); and the diameter of the inner opening of the mounting holes (8) is larger than the diameter of the steel balls (9).

7. A new grinding tool capable of effectively fixing a bearing cap according to claim 6, characterized in that: An embedded pull ring (30) is provided at the top end of the pin head (12).

8. A new type of grinding tool capable of effectively fixing a bearing cover according to claim 7, characterized in that: The elastic unit is a spring (29), which is sleeved on the pin shaft body (5), the top end of the spring (29) abuts against the lower surface of the limiting sleeve (11), and the bottom end of the spring (29) abuts against the step surface (7).

9. A new type of grinding tool capable of effectively fixing a bearing cover according to claim 8, characterized in that: The through holes A (2) and the locking mechanisms (3) are each in four groups. The four groups of through holes A (2) are distributed at the four corners of the grinding tool, and the four groups of locking mechanisms (3) are correspondingly installed in the four groups of through holes A (2).

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