Outer circle grinding device for automobile parts

Abstract

The invention relates to the technical field of automobile part machining, in particular to an automobile part outer circle grinding device which comprises a machining table and further comprises a clamping mechanism arranged on the machining table and a grinding mechanism arranged on one side of the clamping mechanism. The clamping mechanism comprises a first sliding table fixedly installed on the machining table, two sliding seats are arranged on the first sliding table, bottom plates are arranged on the two sliding seats, first supporting plates and second supporting plates are arranged on the bottom plates, center assemblies are arranged on the first supporting plates, and center assemblies are arranged on the second supporting plates. A center positioning assembly is arranged on the second supporting plate, the center positioning assembly movably penetrates through the center positioning assembly, and the problems that center alignment needs to be conducted manually when a center on a grinding machine tool is clamped, the process is tedious and time-consuming, personal errors are likely to be introduced, and therefore the grinding precision and efficiency are affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts processing, and more particularly to an external cylindrical grinding device for automobile parts. Background Art

[0002] In the automotive manufacturing industry, cylindrical grinding of automotive parts is one of the key processes to ensure the precision and surface quality of parts. However, the traditional center clamping method faces a significant technical problem when performing cylindrical grinding: the center needs to be manually aligned. This process is tedious and time-consuming, and is prone to human errors, which affects the accuracy and efficiency of grinding.

[0003] Specifically, the traditional center clamping method usually requires workers to manually align the center hole of the workpiece with the center on the machine tool. This step not only requires workers to have high operating skills, but is also easily affected by various factors such as the workpiece size, shape and machine tool accuracy. Once the alignment is inaccurate, it may cause the workpiece to vibrate, deflect, and other problems during the grinding process, thereby affecting the grinding accuracy and surface quality. In order to solve the above problems, a cylindrical grinding device for automotive parts is proposed. Summary of the Invention

[0004] (1) Technical problems solved In response to the problems existing in the prior art, the present invention provides an external cylindrical grinding device for automotive accessories to solve the problem mentioned in the background technology that the center of the grinding machine tool needs to be manually aligned, which is a cumbersome and time-consuming process and is prone to human errors, thereby affecting the accuracy and efficiency of grinding.

[0005] (2) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cylindrical grinding device for automobile accessories, comprising a processing table, a clamping mechanism arranged on the processing table, and a grinding mechanism arranged on one side of the clamping mechanism, the clamping mechanism comprising a first slide fixedly mounted on the processing table, and two sliding seats are arranged on the first slide, both sliding seats are provided with a bottom plate, and a first support plate and a second support plate are arranged on the bottom plate, a top assembly is provided on the first support plate, a center positioning assembly is provided on the second support plate, and the top assembly movably passes through the center positioning assembly, the top assembly comprises a servo motor fixedly mounted on the first support plate, and a connecting sleeve is fixedly mounted on the output shaft of the servo motor, the connecting sleeve A plug-in slot is provided in the connecting sleeve, and a connecting rod is movably plugged into the plug-in slot, a top is fixedly installed on the end of the connecting rod away from the connecting sleeve, and a rack is provided in an annular array on the circumferential side wall of the top, the center positioning assembly includes a seat sleeve arranged on the second support plate, and also includes a clamping claw arranged in an annular array on the seat sleeve, and a driving member arranged in an annular array in the seat sleeve and corresponding to the clamping claw, the seat sleeve and the top are movably plugged in, and the rack and the driving member are engaged and driven, according to the end diameter of the shaft rod to be externally ground, the moving top is driven by the engagement of the rack and the driving member to adjust the angle of the clamping claw, so that the clamping claw of the annular array can correspond to the outer diameter of the end of the shaft rod after the angle is adjusted, thereby aligning the axis of the shaft rod with the center tip of the top.

[0006] The present invention is further configured such that the grinding mechanism includes a second slide arranged on the processing table, and a grinder arranged on the second slide.

[0007] The present invention is further configured such that the seat cover is welded to the top of the second support plate, and a mounting groove is provided in a circular array on the inner wall of the seat cover, the driving member is arranged inside the mounting groove, and the clamp is rotatably installed in the mounting groove, and an avoidance groove connected to the mounting groove is provided in a circular array on the outer wall of the seat cover, and the avoidance groove and the clamp match.

[0008] The present invention is further configured such that the driving member includes a first gear rotatably mounted on the mounting groove, a second gear arranged on one side of the first gear, a worm rotatably mounted in the mounting groove, and a third gear arranged at one end of the worm and meshing with the second gear.

[0009] The present invention is further configured such that a turbine groove is provided on the side wall of the rotating end of the clamping jaw, and the turbine groove is engaged with the worm.

[0010] The present invention is further configured such that a retaining ring is provided at one end of the circumferential side wall of the top tip close to the connecting rod, and the outer diameters of the retaining ring and the seat sleeve match.

[0011] The present invention is further configured such that a push spring is provided on one side of the retaining ring, and a collar is provided on the other end of the push spring, an adjustment mechanism is provided on one side of the first support plate, and the adjustment mechanism is sleeved on the outside of the connecting sleeve, the collar is sleeved on one end of the adjustment mechanism, and the collar and the adjustment mechanism are rotatably connected.

[0012] The present invention is further configured such that the adjustment mechanism includes a threaded sleeve arranged on one side of the first support plate, and the threaded sleeve is sleeved on the outside of the connecting sleeve, the threaded sleeve is threadedly sleeved with a threaded tube on the outside, and the threaded tube and one side of the collar are rotatably connected, and a rotating disk is provided on the end of the circumferential side wall of the threaded tube away from the collar.

[0013] The present invention is further configured such that the outer circumferential walls of the retaining ring and the sleeve are both provided with connecting blocks in an annular array, and a limiting rod is movably passed through the connecting blocks on the retaining ring and the sleeve.

[0014] The present invention is further configured such that a ring array of limiting grooves is provided on the circumferential side wall of the threaded sleeve, a limiting block is provided on the circumferential inner wall of the collar, and the limiting block and the limiting groove are slidably matched.

[0015] (3) Beneficial effects Compared with the prior art, the present invention provides a cylindrical grinding device for automobile parts, which has the following beneficial effects: 1. In the present invention, the expansion and contraction of the jaws are achieved through the plug-in design of the connecting sleeve and the connecting rod through the top assembly, and the engagement of the rack and the driving part, so that the center positioning of shafts of different diameters can be adapted, which solves the problem of manual center alignment, which is cumbersome and time-consuming, and prone to human errors, thereby affecting the accuracy and efficiency of grinding. In addition, the engagement design of the worm and the turbine groove effectively prevents the accidental rotation of the jaws when the shaft is inserted, further improving the reliability and safety of the device.

[0016] 2. In the present invention, after the shaft is centered, the two sliding seats move closer to each other, causing the top to move in the direction of the push spring. The engagement of the rack and the driving member drives the clamping jaws to rotate and expand, so that after the shaft is clamped and fixed by the top, the clamping jaws expand to the maximum position, thereby avoiding interference with the grinding of the shaft by the clamping jaws.

[0017] 3. Under the action of the adjustment mechanism, the present invention can perform initialization adjustment of the sleeve-shaped adaptation diameter of the annular array clamp according to the diameter of the batch of shaft rods, that is, the clamp angle of the adaptation diameter is pre-adjusted by the adjustment mechanism, and then the shaft rod to be externally ground only needs to be inserted into the clamp of the annular array to achieve automatic centering alignment. When clamping, the clamp is still in the maximum expansion state to avoid obstruction of the shaft rod grinding. After the grinding is completed, when the centers are away from each other so that the shaft rod can be removed, the thrust of the push spring will push the centers to reset again, and reset the clamp to the set initialization adjustment angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the cylindrical grinding device for automotive accessories.

[0019] Figure 2 This is a schematic diagram of the overall structure of the top assembly and center positioning assembly in the cylindrical grinding device of automotive accessories.

[0020] Figure 3 This is a schematic diagram of the exploded structure of the top assembly and center positioning assembly in the cylindrical grinding device of automotive accessories.

[0021] Figure 4 This is a schematic diagram of the internal structure of the center positioning component of the cylindrical grinding device for automotive parts.

[0022] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle.

[0023] Figure 6 This is a schematic diagram of the structure of the adjustment mechanism and top assembly of the cylindrical grinding device for automotive parts.

[0024] Figure 7 for Figure 6 Enlarged structural diagram at point B in the middle.

[0025] Figure 8 This is a schematic diagram of the adjustment mechanism structure of the cylindrical grinding device for automotive parts.

[0026] Figure: 1. Processing table; 2. Clamping mechanism; 201. First slide; 202. Sliding seat; 203. Bottom plate; 204. First support plate; 205. Second support plate; 3. Grinding mechanism; 301. Second slide; 302. Grinding machine; 4. Centering assembly; 401. Servo motor; 402. Connecting sleeve; 403. Plug slot; 404. Connecting rod; 405. Centering assembly; 406. Rack; 407. Retaining ring; 5. Centering assembly Parts; 501, seat cover; 502, clamping claw; 503, mounting groove; 504, avoidance groove; 505, turbine groove; 6, driving part; 601, first gear; 602, second gear; 603, worm; 604, third gear; 7, push spring; 8, collar; 801, limit block; 9, adjusting mechanism; 901, threaded sleeve; 902, threaded pipe; 903, rotating disk; 904, limit groove; 10, connecting block; 11, limit rod. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directions such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0030] For examples, see Figure 1 - Figure 8 A cylindrical grinding device for automotive accessories includes a processing table 1, a clamping mechanism 2 arranged on the processing table 1, and a grinding mechanism 3 arranged on one side of the clamping mechanism 2. A control panel is provided on the processing table 1 for controlling and adjusting the operation of the clamping mechanism 2 and the grinding mechanism 3. The clamping mechanism 2 is used to clamp and fix the shaft to be cylindrically ground, and the grinding mechanism 3 is used to perform grinding operations on the clamped shaft.

[0031] The clamping mechanism 2 includes a first slide 201 fixedly mounted on the processing table 1, and two sliding seats 202 are provided on the first slide 201, two screw rods are provided on the first slide 201, and each screw rod is equipped with a drive motor. The two sliding seats 202 are driven by a corresponding screw rod, so that the two sliding seats 202 can be controlled and moved independently, and a base plate 203 is provided on each of the two sliding seats 202, and a first support plate 204 and a second support plate 205 are provided on the base plate 203. A top assembly 4 is provided on the first support plate 204, and a center positioning assembly 5 is provided on the second support plate 205, and the top assembly 4 movably passes through the center positioning assembly 5; The top assembly 4 includes a servo motor 401 fixedly mounted on the first support plate 204, and a connecting sleeve 402 is fixedly mounted on the output shaft of the servo motor 401. A plug slot 403 is defined in the connecting sleeve 402, and a connecting rod 404 is movably inserted into the plug slot 403. A top 405 is fixedly mounted on the end of the connecting rod 404 away from the connecting sleeve 402, and a rack 406 is provided in an annular array on the circumferential side wall of the top 405. The centering assembly 5 includes a seat sleeve 501 disposed on the second support plate 205, a ring array of clamping jaws 502 disposed on the seat sleeve 501, and a ring array of driving members 6 disposed within the seat sleeve 501 and corresponding to the clamping jaws 502. The seat sleeve 501 and the top 405 are movably connected, and the rack 406 and the driving member 6 are engaged and driven. According to the end diameter of the shaft to be externally ground, the movable tip 405 adjusts the angle of the clamping jaws 502 through the meshing drive of the rack 406 and the driving member 6, so that the clamping jaws 502 of the annular array can correspond to the outer diameter of the end of the shaft after the angle is adjusted, thereby aligning the axis of the shaft with the central tip of the tip 405.

[0032] Specifically, the plug-in slot 403 is non-through-type and is opened at one end of the connecting sleeve 402. The slot type can be a square column slot, a triangular column slot or other anti-rotation special-shaped slot. The connecting rod 404 needs to match the slot type of the plug-in slot 403. The depth of the plug-in slot 403 is greater than the length of the rack 406, and the portion greater than the length of the rack 406 does not affect the transmission connection between the connecting sleeve 402 and the connecting rod 404. Therefore, when the shaft to be externally ground is centered by the clamping jaws 502 of the annular array and corresponds to the central tip of the top 405, the two sliding seats on the first slide 201 are controlled by the control surface of the processing table 1. 202 moves and clamps. Under the action of the clamping force, the top points 405 on both sides will be pushed to move toward the servo motors 401 on both sides, thereby driving the connecting rod 404 to be plugged into the inside of the plug-in slot 403, and at the same time driving the rack 406 to engage the driving part 6, so that the clamping claws 502 expand. It should be noted that when the two sliding seats 202 on the first slide 201 move to clamp the shaft rod, because the clamping claws 502 will expand, it is necessary to manually support the positioned shaft rod until the connecting rod 404 is inserted into the bottom end of the plug-in slot 403. The top point 405 cannot move and is clamped and fixed under the clamping force of the two sliding seats 202 approaching each other.

[0033] Furthermore, when the connecting rod 404 is inserted into the bottom end of the insertion slot 403, the rack 406 on the top 405 engages the driving member 6, so that the annular array of jaws 502 expands to the maximum state, and when the jaws 502 expand to the maximum state, there is a certain distance between the jaws 502 and the vertical plane of the rotating end and the clamping end of the shaft rod, so that the setting of the jaws 502 will not hinder the grinding of the shaft rod end.

[0034] The grinding mechanism 3 includes a second slide 301 arranged on the processing table 1, and a grinder 302 arranged on the second slide 301. The second slide 301 and the first slide 201 are perpendicular to each other and are adjusted according to the diameter of the shaft to be ground, so that the grinding disc of the grinder 302 can fit the clamped side wall of the shaft, thereby realizing the grinding of the outer circle of the shaft.

[0035] The seat sleeve 501 is welded to the top of the second support plate 205, and the inner wall of the seat sleeve 501 is provided with a mounting groove 503 in an annular array, the driving member 6 is arranged inside the mounting groove 503, and the clamping jaw 502 is rotatably installed in the mounting groove 503, and the outer wall of the seat sleeve 501 is provided with an avoidance groove 504 connected to the mounting groove 503 in an annular array, and the avoidance groove 504 and the clamping jaw 502 match, and the ends of the clamping jaws 502 of the annular array away from the rotating end are close to each other, that is, when positioning the shaft rod with the minimum diameter range, the middle section of the clamping jaw 502 rotates into the avoidance groove 504 and is in a horizontal state, and the end of the clamping jaw 502 away from the rotating end is bent, so that when the clamping jaw 502 rotates to a horizontal state, the bent ends of the annular array can fit together, thereby performing center positioning on the shaft rod with a small diameter.

[0036] The driving member 6 includes a first gear 601 rotatably mounted on the mounting groove 503, a second gear 602 arranged on one side of the first gear 601, a worm 603 rotatably mounted in the mounting groove 503, and a third gear 604 arranged at one end of the worm 603 and meshing with the second gear 602. The axial direction of the first gear 601 and the axial direction of the seat sleeve 501 are perpendicular to each other, and the teeth of the first gear 601 protrude from the inner wall of the seat sleeve 501 and mesh with the rack 406 on the circumferential side wall of the top 405, so that when the top 405 moves in the seat sleeve 501, the rack 406 will drive the first gear 601 to rotate, thereby driving the worm 603 to rotate through the meshing of the second gear 602 and the third gear 604, wherein the axial direction of the worm 603 is the same as the axial direction of the seat sleeve 501.

[0037] A turbine groove 505 is provided on the side wall of the rotating end of the clamping jaw 502, and the turbine groove 505 is engaged with the worm 603. When the engagement of the second gear 602 and the third gear 604 drives the worm 603 to rotate, the engagement of the turbine groove 505 and the worm 603 allows the clamping jaw 502 to be rotated and adjusted. After the rotation and adjustment, the clamping jaw 502 can be in the shape of an annular sleeve that fits the shaft rod due to the structural relationship of the engagement of the worm 603 and the turbine groove 505. After the angle of the clamping jaw 502 of the annular array is adjusted, it can be used for the insertion and centering of the shaft rod to be externally ground, and the clamping jaw 502 will not rotate under the pressure of the gravity of the shaft rod.

[0038] Specifically, if there is no worm 603 and turbine groove 505, but a tooth groove adapted to the first gear 601 is directly opened on the clamping jaw 502, then although the first gear 601 can be driven to engage with the tooth groove by moving the top 405 to drive the clamping jaw 502 to rotate for adjustment, and the clamping jaw 502 can also maintain the adjusted angle without the action of external force, but when the shaft is inserted, the gravity of the shaft will push the clamping jaw 502 to rotate, thereby driving the first gear 601 to engage with the rack 406, so that the top 405 moves, causing the sleeve-shaped clamping jaw 502 of the annular array to expand, and the purpose of centering cannot be achieved.

[0039] A retaining ring 407 is provided at one end of the circumferential side wall of the top 405 close to the connecting rod 404, and the outer diameter of the retaining ring 407 matches the outer diameter of the seat sleeve 501, so that the top 405 can be movably inserted between the seat sleeve 501 and the connecting sleeve 402, avoiding the top 405 from falling off.

[0040] A push spring 7 is provided on one side of the retaining ring 407, and a collar 8 is provided on the other end of the push spring 7; An adjustment mechanism 9 is provided on one side of the first support plate 204, and the adjustment mechanism 9 is sleeved on the outside of the connecting sleeve 402; The collar 8 is sleeved on one end of the adjusting mechanism 9, and the collar 8 and the adjusting mechanism 9 are rotatably connected.

[0041] Because the push spring 7 is always in effect, when the push spring 7 is not squeezed and contracted, the distance between the top 405 and the collar 8 remains unchanged. Then, the push collar 8 is adjusted by the adjustment mechanism 9 to cause the collar 8 to be displaced, thereby causing the top 405 to be displaced under the action of the push spring 7. Through the displacement of the top 405, the rack 406 and the first gear 601 are engaged, thereby realizing the rotation adjustment of the driving member 6 driving the clamping jaw 502, so that the end of the clamping jaw 502 forms an annular array sleeve adapted to the diameter of the shaft to be externally ground.

[0042] The adjusting mechanism 9 includes a threaded sleeve 901 arranged on one side of the first support plate, and the threaded sleeve 901 is sleeved on the outside of the connecting sleeve 402. The threaded sleeve 901 is threadedly sleeved with a threaded tube 902 on the outside, and the threaded tube 902 and one side of the collar 8 are rotatably connected. A rotating disk 903 is provided on the end of the circumferential side wall of the threaded tube 902 away from the collar 8. Through the rotation of the rotating disk 903, the threaded tube 902 moves axially on the threaded sleeve 901, thereby pushing the collar 8 to move. The movement of the collar 8 pushes the top 405 to move through the push spring 7, thereby realizing the rotation adjustment of the clamp 502, so that the clamp 502 can center the shaft rods of different diameters to be externally ground.

[0043] The outer walls of the retaining ring 407 and the sleeve 8 are both provided with connecting blocks 10 in a circular array, and the connecting blocks 10 on the retaining ring 407 and the connecting blocks 10 on the sleeve 8 are movable through the limiting rod 11, and anti-slip blocks are provided at both ends of the limiting rod 11. When the anti-slip blocks and the connecting blocks 10 at both ends of the limiting rod 11 are in fit condition, the push spring 7 is in a relaxed state, because when the adjusting mechanism 9 is adjusting, the push spring 7 can only adjust the clamping jaw 502 from an expanded state (i.e., large diameter) to a contracted state (i.e., small diameter). When callback is required, the adjusting mechanism 9 needs to pull the retaining ring 407 through the limiting rod 11, and the retaining ring 407 pulls the top 405, thereby realizing the adjustment of the clamping jaw 502 from a contracted state (i.e., small diameter) to an expanded state (i.e., large diameter).

[0044] The threaded sleeve 901 is provided with a ring array of limiting grooves 904 on its circumferential side wall; A limit block 801 is provided on the inner wall of the circumference of the collar 8, and the limit block 801 is slidably matched with the limit groove 904. The matching between the limit groove 904 and the limit block 801 prevents the collar 8 from rotating when the threaded tube 902 rotates, causing the limit rod 11 to rotate, twist, and thus bend.

[0045] In all the schemes mentioned above, the connection between the two parts can be selected according to actual conditions by welding, bolt and nut connection, bolt or screw connection or other well-known connection methods, which will not be described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the present invention have been shown and described, it can be understood by those skilled in the art that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cylindrical grinding device for automobile parts, characterized in that: It comprises a processing table (1), a clamping mechanism (2) arranged on the processing table (1), and a grinding mechanism (3) arranged on one side of the clamping mechanism (2); The clamping mechanism (2) comprises a first slide (201) fixedly mounted on the processing table (1), and two sliding seats (202) are arranged on the first slide (201), and the two sliding seats (202) are both provided with a bottom plate (203), and the bottom plate (203) is provided with a first support plate (204) and a second support plate (205), the first support plate (204) is provided with a top assembly (4), the second support plate (205) is provided with a center positioning assembly (5), and the top assembly (4) movably passes through the center positioning assembly (5); The tip assembly (4) comprises a servo motor (401) fixedly mounted on the first support plate (204), and a connecting sleeve (402) is fixedly mounted on the output shaft of the servo motor (401), a plug slot (403) is provided in the connecting sleeve (402), and a connecting rod (404) is movably plugged into the plug slot (403), a tip (405) is fixedly mounted on one end of the connecting rod (404) away from the connecting sleeve (402), and racks (406) are arranged in an annular array on the circumferential side wall of the tip (405); The center positioning assembly (5) comprises a seat cover (501) arranged on the second support plate (205), and also comprises clamping claws (502) arranged in an annular array on the seat cover (501), and a driving member (6) arranged in an annular array in the seat cover (501) and corresponding to the clamping claws (502), wherein the seat cover (501) and the top (405) are movably plugged, and the rack (406) and the driving member (6) are meshed and driven; According to the end diameter of the shaft to be externally ground, the movable top (405) is driven by the meshing of the rack (406) and the driving member (6) to adjust the angle of the clamping jaws (502), so that the clamping jaws (502) of the annular array can correspond to the outer diameter of the end of the shaft after the angle is adjusted, so that the axis of the shaft is aligned with the central tip of the top (405); The seat cover (501) is welded to the top of the second support plate (205), and the inner wall of the seat cover (501) is provided with mounting grooves (503) in an annular array, the driving member (6) is arranged inside the mounting groove (503), and the clamping jaw (502) is rotatably installed in the mounting groove (503), and the outer wall of the seat cover (501) is provided with avoidance grooves (504) in an annular array and connected to the mounting grooves (503), and the avoidance grooves (504) and the clamping jaw (502) match each other; The driving member (6) comprises a first gear (601) rotatably mounted on the mounting groove (503), a second gear (602) arranged on one side of the first gear (601), a worm (603) rotatably mounted in the mounting groove (503), and a third gear (604) arranged at one end of the worm (603) and meshing with the second gear (602); A turbine groove (505) is provided on the side wall of the rotating end of the clamping jaw (502), and the turbine groove (505) is meshed with the worm (603).

2. The cylindrical grinding device for automobile parts according to claim 1, characterized in that: The grinding mechanism (3) comprises a second slide (301) arranged on the processing table (1), and a grinder (302) arranged on the second slide (301).

3. The cylindrical grinding device for automobile parts according to claim 2, characterized in that: A retaining ring (407) is provided at one end of the circumferential side wall of the top end (405) close to the connecting plug rod (404), and the outer diameters of the retaining ring (407) and the seat sleeve (501) match.

4. The cylindrical grinding device for automobile parts according to claim 3 is characterized in that: A push spring (7) is provided on one side of the retaining ring (407), and a collar (8) is provided on the other end of the push spring (7); An adjustment mechanism (9) is provided on one side of the first support plate (204), and the adjustment mechanism (9) is sleeved on the outside of the connecting sleeve (402); The sleeve ring (8) is sleeved on one end of the adjustment mechanism (9), and the sleeve ring (8) and the adjustment mechanism (9) are rotatably connected.

5. The cylindrical grinding device for automobile parts according to claim 4, characterized in that: The adjustment mechanism (9) comprises a threaded sleeve (901) arranged on one side of the first support plate, and the threaded sleeve (901) is sleeved on the outside of the connecting sleeve (402), a threaded tube (902) is sleeved on the outside of the threaded sleeve (901), and the threaded tube (902) and one side of the collar (8) are rotatably connected, and a rotating disk (903) is provided on one end of the circumferential side wall of the threaded tube (902) away from the collar (8).

6. The cylindrical grinding device for automobile parts according to claim 5, characterized in that: The outer circumferential walls of the retaining ring (407) and the sleeve ring (8) are both provided with connecting blocks (10) in an annular array, and a limiting rod (11) movably penetrates between the connecting blocks (10) on the retaining ring (407) and the connecting blocks (10) on the sleeve ring (8).

7. The cylindrical grinding device for automobile parts according to claim 6, characterized in that: The threaded sleeve (901) is provided with a ring-shaped array of limiting grooves (904) on its circumferential side wall; A limiting block (801) is provided on the circumferential inner wall of the collar (8), and the limiting block (801) and the limiting groove (904) are slidably matched.

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