An automatic grinding device for automobile seat belt spindles

Abstract

The present invention relates to an automatic grinding device for an automobile seat belt spindle, which includes a spindle loading device, a spindle transmission device, a spindle side grinding device, a spindle end face grinding device and a discharging device. The spindle loading device: loads the spindle and transfers the spindle to the spindle transmission device; the spindle transmission device: receives the spindle and sequentially transfers the spindle to the spindle side grinding device, the spindle end face grinding device and the discharging device; the spindle side grinding device: grinds the inner side and the outer side of the spindle; the spindle end face grinding device: grinds the end face of the spindle; the discharging device: removes the spindle from the spindle transmission device.

Description

Technical Field

[0001] The present invention relates to a grinding device, and more particularly to an automatic grinding device for an automotive seat belt spindle. Background Art

[0002] The automotive seat belt spindle is an important component in the automotive seat belt system. It generally refers to the rotating shaft inside the seat belt retractor, around which the seat belt is wound. The spindle works in coordination with the spring and other mechanical components inside the retractor, enabling the seat belt to automatically retract when not in use and quickly lock up when the vehicle encounters a collision or emergency braking, so as to ensure that the passengers are firmly fixed in their seats, thereby reducing the risk of injury.

[0003] After the spindle is manufactured, it is necessary to grind the inner side, outer side and both ends of the spindle to remove burrs. However, currently, manual grinding is often relied on, resulting in low work efficiency and poor results. During the automation process, since there are requirements for the position and posture of the spindle during grinding, it is necessary to adjust its position and posture during feeding. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an automatic grinding device for an automotive seat belt spindle.

[0005] To achieve the above object, the present invention provides the following technical solutions: It includes a mandrel loading device, a mandrel transmission device, a mandrel side grinding device, a mandrel end face grinding device and a discharging device. The mandrel loading device: loads the mandrel and transfers the mandrel to the mandrel transmission device; the mandrel transmission device: receives the mandrel and sequentially transfers the mandrel to the mandrel side grinding device, the mandrel end face grinding device and the discharging device; the mandrel side grinding device: grinds the inner side and the outer side of the mandrel; the mandrel end face grinding device: grinds the end face of the mandrel; the discharging device: removes the mandrel from the mandrel transmission device; the mandrel loading device includes a loading belt, a guide plate, a blocking cylinder, a blocking block, a fixing cylinder, a fixing block, a detector, a turning member, a first transfer mechanism, a transition table, a rotating member and a second transfer mechanism. The guide plate is arranged on the loading belt and forms a passing opening for a single mandrel to pass through horizontally. The blocking cylinder drives the blocking block to move in a direction perpendicular to the conveying direction of the loading belt. The blocking block has a blocking position opposite to the passing opening and blocks the mandrel from continuing to move forward. The fixing cylinder drives the fixing block to move in a direction parallel to the conveying direction of the loading belt and the fixing block is located at the end of the loading belt. The fixing block has a detection position opposite to the passing opening and clamps the end face protrusion of the mandrel. The detector is arranged on the fixing block and is used to detect the mandrel. The transition table has a transition carrier. The first transfer mechanism drives the turning member to move. The turning member has a picking position opposite to the detection position and a transition position opposite to the transition carrier. The turning member has a turning state for turning the mandrel. The second transfer mechanism drives the rotating member to move. The rotating member has a material transfer position opposite to the transition table and a feeding position opposite to the mandrel transmission device. The rotating member has an angle adjustment state for rotating the mandrel.

[0006] By adopting the above technical solution, when the mandrel needs to be polished, the mandrel is placed on the feeding belt and then driven by the feeding belt until it abuts against the guiding plate and then exits through the through port. After the first mandrel passes through the position where the blocking block is located, the blocking cylinder drives the blocking member to block the next mandrel. At the same time, the first mandrel moves to the position opposite to the fixed block, and then the fixed cylinder drives the fixed block to clamp the protrusion on the end face of the mandrel. Since the protrusions on the two end faces of the mandrel are of different sizes, there will be a difference when the fixed block clamps, which can be detected by the detector. If the direction is incorrect, then the two end faces are swapped by the flipping member, and then the first transfer mechanism transfers the mandrel to the transfer carrier. If the direction is correct, the first transfer mechanism directly transfers the mandrel to the transfer carrier. Then the rotating member clamps the mandrel and rotates it to a suitable position, and then the second transfer mechanism transfers the mandrel to the mandrel transmission device, and the mandrel transmission device sequentially transfers the mandrels to the mandrel side polishing device for inner and outer side polishing, then to the mandrel end face polishing device to polish the two end faces of the mandrel, and finally to the unloading device for unloading. First, the guiding plate makes the mandrel drive along the direction of the feeding belt and is parallel to the feeding belt itself. Then the detector and the flipping member ensure that the directions of its two end faces are correct. Finally, the rotating member ensures the correct side angle, so as to ensure the position and pose of the mandrel.

[0007] The present invention is further arranged as follows: the guiding plate includes a first guiding plate and a second guiding plate. The first guiding plate is arranged on the side of the feeding belt and is arranged along the conveying direction of the feeding belt. The second guiding plate has a first parallel part, an inclined connecting part and a second parallel part. The first parallel part is arranged on the other side of the feeding belt relative to the first guiding plate. The second parallel part is parallel to the first guiding plate and the distance between the second parallel part and the first guiding plate is less than the distance between the first parallel part and the first guiding plate. The inclined connecting part connects the first parallel part and the second parallel part. A through port for a single mandrel to pass through is formed between the first guiding plate and the second parallel part.

[0008] By adopting the above technical solution, when the mandrel is placed on the feeding belt, it is then located between the first guiding plate and the first parallel part, then abuts against the inclined connecting part and gradually approaches the second parallel part until the mandrel rotates to a position where it can enter the through port between the second parallel part and the first guiding plate.

[0009] The present invention is further arranged as follows: the rotating member includes a rotating cylinder, a rotating shaft and a fixed shaft. The second transfer mechanism includes a clamping cylinder. The clamping cylinder has a left clamping block and a right clamping block. The fixed shaft is arranged on the right clamping block and is relatively close to the left clamping block. The rotating shaft is arranged on the left clamping block and is relatively close to the right clamping block. The rotating cylinder is arranged on the other side of the left clamping block relative to the rotating shaft. The rotating cylinder has a driving shaft located inside the rotating shaft.

[0010] By adopting the above technical solution, when it is necessary to adjust the axial angle of the mandrel, the clamping cylinder drives the left clamping block and the right clamping block to clamp the mandrel. At this time, the rotating shaft and the fixed shaft are respectively abutted against the mandrel, and the driving shaft in the rotating shaft is abutted against the protrusion on the end face of the mandrel. Then, the rotating cylinder drives the mandrel to rotate through the driving shaft.

[0011] The present invention is further configured as follows: The mandrel transmission device includes a transmission belt and a transmission carrier. The transmission belt has a transmission state of conveying the transmission carrier along the transmission belt. The transmission carrier has a receiving position opposite to the mandrel feeding device, a side grinding position opposite to the mandrel side grinding device, an end face grinding position opposite to the mandrel end face grinding device, and a discharging position opposite to the discharging device.

[0012] The present invention is further configured as follows: The mandrel side grinding device includes a side grinding machine, a side grinding head, a locking block, and a locking cylinder. The side grinding machine drives the side grinding head to move and grind the side of the mandrel. The locking cylinders are respectively arranged on both sides of the transmission belt and drive the locking blocks to move vertically. A grinding port opposite to the side grinding position is arranged on the locking block, and a fixing part abutted against the end face of the mandrel is arranged on the side of the grinding port. There may be two mandrel side grinding devices, one for grinding the outer side and the other for grinding the inner side.

[0013] By adopting the above technical solution, when it is necessary to grind the side, the transmission belt moves the transmission carrier with the mandrel to the side grinding position. Then, the locking cylinder drives the locking block to move downward until the fixing part abuts against the end face of the mandrel. At this time, the mandrel is fixed, and then the side grinding machine drives the side grinding head to grind the inner side and the outer side of the mandrel.

[0014] The present invention is further configured as follows: It further includes a suction head, and the suction head has a cleaning state of sucking miscellaneous materials opposite to the grinding port.

[0015] By adopting the above technical solution, the suction head can suck the miscellaneous materials generated by grinding.

[0016] The present invention is further configured as follows: The mandrel end face grinding device includes a pushing cylinder, a pushing seat, an end face grinding machine, an end face grinding head, and a preloading member. The pushing cylinder drives the pushing seat to move in the direction close to and away from the transmission belt. The end face grinding machine is arranged on the pushing seat and drives the end face grinding head to move. The preloading member is arranged at the end face grinding position to fix the mandrel.

[0017] By adopting the above technical solution, when it is necessary to grind the end face, first, the preloading member fixes the mandrel located at the end face grinding position. Then, the pushing cylinder drives the pushing seat to approach the transmission belt. Then, the end face grinding machine drives the end face grinding head to grind the end face of the mandrel.

[0018] The present invention is further configured such that: the discharging device includes a discharging chute and a discharging gripper, and the discharging gripper has a material-taking position opposite to the discharging position and a discharging position opposite to the discharging chute. Description of the Drawings

[0019] Figure 1 is a schematic structural view of the whole of the present invention;

[0020] Figure 2 is a schematic structural view of the mandrel loading device of the present invention;

[0021] Figure 3 is a schematic structural view of the rotating member and the second transfer mechanism of the present invention;

[0022] Figure 4 is a schematic structural view of the mandrel side grinding device of the present invention;

[0023] Figure 5 is a schematic structural view of the mandrel end face grinding device of the present invention.

[0024] In the figures: 1. Mandrel loading device; 11. Loading belt; 12. Guide plate; 121. First guide plate; 122. Second guide plate; 1221. First parallel part; 1222. Oblique connecting part; 1223. Second parallel part; 123. Through port; 13. Blocking cylinder; 131. Blocking block; 14. Fixing cylinder; 141. Fixing block; 142. Detector; 15. Flipping member; 16. First transfer mechanism; 17. Transition table; 171. Transition carrier; 18. Rotating member; 181. Rotating cylinder; 182. Rotating shaft; 183. Fixed shaft; 184. Clamping cylinder; 185. Left clamping block; 186. Right clamping block; 19. Second transfer mechanism; 2. Mandrel transmission device; 21. Transmission belt; 22. Transmission carrier; 3. Mandrel side grinding device; 31. Side grinding machine; 32. Side grinding head; 33. Locking block; 34. Locking cylinder; 35. Grinding port; 36. Fixing part; 37. Suction head; 4. Mandrel end face grinding device; 41. Pushing cylinder; 42. Pushing seat; 43. End face grinding machine; 44. End face grinding head; 45. Pre-pressing member; 5. Discharging device; 51. Discharging chute; 52. Discharging gripper. Detailed Description of the Invention

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] Such as Figures 1-5As shown in the figure, the present invention discloses an automatic grinding device for an automobile seat belt mandrel, which includes a mandrel loading device 1, a mandrel transmission device 2, a mandrel side grinding device 3, a mandrel end face grinding device 4 and a discharging device 5. The mandrel loading device 1: loads the mandrel and transfers the mandrel to the mandrel transmission device 2; the mandrel transmission device 2: receives the mandrel and sequentially transfers the mandrel to the mandrel side grinding device 3, the mandrel end face grinding device 4 and the discharging device 5; the mandrel side grinding device 3: grinds the inner side and the outer side of the mandrel; the mandrel end face grinding device 4: grinds the end face of the mandrel; the discharging device 5: removes the mandrel from the mandrel transmission device 2;The mandrel loading device 1 includes a loading belt 11, a guiding plate 12, a blocking cylinder 13, a blocking block 131, a fixing cylinder 14, a fixing block 141, a detector 142, a flipping member 15, a first transfer mechanism 16, a transition table 17, a rotating member 18 and a second transfer mechanism 19. The guiding plate 12 is arranged on the loading belt 11 and forms a passing opening 123 for a single mandrel to pass through horizontally. The blocking cylinder 13 drives the blocking block 131 to move in a direction perpendicular to the conveying direction of the loading belt 11. The blocking block 131 has a blocking position opposite to the passing opening 123 to block the mandrel from moving forward. The fixing cylinder 14 drives the fixing block 141 to move in a direction parallel to the conveying direction of the loading belt 11, and the fixing block 141 is located at the end of the loading belt 11. The fixing block 141 has a detection position opposite to the passing opening 123 to clamp the protrusion on the end face of the mandrel. The detector 142 is arranged on the fixing block 141 and is used to detect the mandrel. The transition table 17 has a transition carrier 171. The first transfer mechanism 16 drives the flipping member 15 to move. The flipping member 15 has a material taking position opposite to the detection position and a transition position opposite to the transition carrier 171. The flipping member 15 has a flipping state for flipping the mandrel. The second transfer mechanism 19 drives the rotating member 18 to move. The rotating member 18 has a material transferring position opposite to the transition table 17 and a feeding position opposite to the mandrel transmission device 2. The rotating member 18 has an angle adjustment state for rotating the mandrel. When the mandrel needs to be polished, the mandrel is placed on the loading belt 11 and then driven by the loading belt 11 until it abuts against the guiding plate 12 and then passes out through the passing opening 123. After the first mandrel passes through the position where the blocking block 131 is located, the blocking cylinder 13 drives the blocking member to block the next mandrel. At the same time, the first mandrel moves to a position opposite to the fixing block 141, and then the fixing cylinder 14 drives the fixing block 141 to clamp the protrusion on the end face of the mandrel. Since the protrusions on the two end faces of the mandrel are of different sizes, there will be a difference when the fixing block 141 clamps, which can be detected by the detector 142. If the direction is incorrect, then the flipping member 15 is used to swap the directions of its two end faces, and then the first transfer mechanism 16 transfers the mandrel to the transition carrier 171. If the direction is correct, the first transfer mechanism 16 directly transfers the mandrel to the transition carrier 171. Then the rotating member 18 clamps the mandrel and rotates it to a proper position, and then the second transfer mechanism 19 transfers the mandrel to the mandrel transmission device 2, and the mandrel transmission device 2 sequentially transfers the mandrel to the mandrel side polishing device 3 for inner and outer side polishing, then to the mandrel end face polishing device 4 for polishing the two end faces of the mandrel, and finally to the unloading device 5 for unloading. First, the guiding plate 12 makes the mandrel drive along the direction of the loading belt 11 and be parallel to the loading belt 11 itself. Then, the detector 142 and the flipping member 15 ensure that the directions of its two end faces are correct. Finally, the rotating member 18 ensures that the side angle is correct, so as to ensure the position and pose of the mandrel.;

[0028] The guiding plate 12 includes a first guiding plate 121 and a second guiding plate 122. The first guiding plate 121 is arranged on the side of the loading tape 11 and along the conveying direction of the loading tape 11. The second guiding plate 122 has a first parallel portion 1221, an inclined connecting portion 1222 and a second parallel portion 1223. The first parallel portion 1221 is arranged on the other side of the loading tape 11 relative to the first guiding plate 121. The second parallel portion 1223 is parallel to the first guiding plate 121 and the distance between the second parallel portion 1223 and the first guiding plate 121 is smaller than the distance between the first parallel portion 1221 and the first guiding plate 121. The inclined connecting portion 1222 connects the first parallel portion 1221 and the second parallel portion 1223. A passing port 123 for a single mandrel to pass through is formed between the first guiding plate 121 and the second parallel portion 1223. When the mandrel is placed on the loading tape 11, it is then located between the first guiding plate 121 and the first parallel portion 1221, and then abuts against the inclined connecting portion 1222 and gradually approaches the second parallel portion 1223 until the mandrel rotates to a position where it can enter the passing port 123 between the second parallel portion 1223 and the first guiding plate 121.

[0029] The rotating member 18 includes a rotating cylinder 181, a rotating shaft 182 and a fixed shaft 183. The second transfer mechanism 19 includes a clamping cylinder 184. The clamping cylinder 184 has a left clamping block 185 and a right clamping block 186. The fixed shaft 183 is arranged on the right clamping block 186 and is relatively close to the left clamping block 185. The rotating shaft 182 is arranged on the left clamping block 185 and is relatively close to the right clamping block 186. The rotating cylinder 181 is arranged on the other side of the left clamping block 185 relative to the rotating shaft 182. The rotating cylinder 181 has a driving shaft located inside the rotating shaft 182. When it is necessary to adjust the axial angle of the mandrel, the clamping cylinder 184 drives the left clamping block 185 and the right clamping block 186 to clamp the mandrel. At this time, the rotating shaft 182 and the fixed shaft 183 respectively abut against the mandrel, and the driving shaft inside the rotating shaft 182 abuts against the protrusion on the end face of the mandrel. Then, the rotating cylinder 181 drives the mandrel to rotate through the driving shaft.

[0030] The mandrel transmission device 2 includes a transmission belt 21 and a transmission carrier 22. The transmission belt 21 has a transmission state of conveying the transmission carrier 22 along the transmission belt 21. The transmission carrier 22 has a receiving position opposite to the mandrel loading device 1, a side grinding position opposite to the mandrel side grinding device 3, an end face grinding position opposite to the mandrel end face grinding device 4, and a discharging position opposite to the discharging device 5.

[0031] The mandrel side grinding device 3 includes a side grinding machine 31, a side grinding head 32, a locking block 33, and a locking cylinder 34. The side grinding machine 31 drives the side grinding head 32 to move and grind the side of the mandrel. The locking cylinders 34 are respectively arranged on both sides of the conveyor belt 21 and drive the locking blocks 33 to move vertically. A grinding port 35 opposite to the side grinding position is arranged on the locking block 33, and a fixing part 36 abutting against the end face of the mandrel is arranged on the side of the grinding port 35. There can be two mandrel side grinding devices 3, one for grinding the outer side and the other for grinding the inner side. When the side needs to be ground, the conveyor belt 21 moves the conveying carrier 22 with the mandrel to the side grinding position, and then the locking cylinder 34 drives the locking block 33 to move downward until the fixing part 36 abuts against the end face of the mandrel. At this time, the mandrel is fixed, and then the side grinding machine 31 drives the side grinding head 32 to grind the inner side and the outer side of the mandrel.

[0032] It further includes a suction head 37. The suction head 37 has a cleaning state in which it faces the grinding port 35 and sucks up the miscellaneous materials. The suction head 37 can suck up the miscellaneous materials generated by grinding.

[0033] The mandrel end face grinding device 4 includes a pushing cylinder 41, a pushing seat 42, an end face grinding machine 43, an end face grinding head 44, and a preloading part 45. The pushing cylinder 41 drives the pushing seat 42 to move in the direction close to and away from the conveyor belt 21. The end face grinding machine 43 is arranged on the pushing seat 42 and drives the end face grinding head 44 to move. The preloading part 45 is arranged at the end face grinding position and fixes the mandrel. When the end face needs to be ground, first, the preloading part 45 fixes the mandrel at the end face grinding position, then the pushing cylinder 41 drives the pushing seat 42 to approach the conveyor belt 21, and then the end face grinding machine 43 drives the end face grinding head 44 to grind the end face of the mandrel.

[0034] The unloading device 5 includes an unloading chute 51 and an unloading gripper 52. The unloading gripper 52 has a material-taking position opposite to the unloading position and an unloading position opposite to the unloading chute 51.

[0035] Working process: When the mandrel needs to be polished, place the mandrel on the feeding belt 11, and then it is driven by the feeding belt 11. At this time, it is located between the first guide plate 121 and the first parallel part 1221, and then abuts against the inclined connecting part 1222 and gradually approaches the second parallel part 1223 until the mandrel rotates to the passing port 123 between the second parallel part 1223 and the first guide plate 121. After the first mandrel passes through the position where the blocking block 131 is located, the blocking cylinder 13 drives the blocking member to block the next mandrel. At the same time, the first mandrel moves to the relative position with the fixed block 141, and then the fixing cylinder 14 drives the fixed block 141 to clamp the protrusion on the end face of the mandrel. Since the protrusions on the two end faces of the mandrel are of different sizes, there will be a difference when the fixed block 141 clamps, which can be detected by the detector 142. If the direction is incorrect, then the flipping member 15 is used to swap the directions of its two end faces, and then the first transfer mechanism 16 transfers the mandrel to the transfer carrier 171. If the direction is correct, the first transfer mechanism 16 directly transfers the mandrel to the transfer carrier 171. The clamping cylinder 184 drives the left clamping block 185 and the right clamping block 186 to clamp the mandrel. At this time, the rotating shaft 182 and the fixed shaft 183 abut against the mandrel respectively, and the driving shaft in the rotating shaft 182 abuts against the protrusion on the end face of the mandrel. Then the rotating cylinder 181 drives the mandrel to rotate through the driving shaft to make it rotate to a suitable position, and then the second transfer mechanism 19 transfers the mandrel to the mandrel transmission device 2, and the mandrel transmission device 2 sequentially transfers the mandrel to the mandrel side polishing device 3. Then the locking cylinder 34 drives the locking block 33 to move downward until the fixing part 36 abuts against the end face of the mandrel. At this time, the mandrel is fixed, and then the side polishing machine 31 drives the side polishing head 32 to polish the inner side and the outer side of the mandrel, and then transfers it to the mandrel end face polishing device 4. First, the pre-pressing member 45 fixes the mandrel located at the end face polishing position, and then the pushing cylinder 41 drives the pushing seat 42 to approach the conveyor belt 21, and then the end face polishing machine 43 drives the end face polishing head 44 to polish the end face of the mandrel, and finally transfers it to the unloading device 5 for unloading.

Claims

1. An automatic polishing device for an automobile seat belt mandrel, characterized in that: It includes a mandrel loading device (1), a mandrel transfer device (2), a mandrel side grinding device (3), a mandrel end face grinding device (4) and a discharging device (5). Mandrel loading device (1): Loads the mandrel and transfers the mandrel to the mandrel transfer device (2). Mandrel transfer device (2): Receives the mandrel and sequentially transfers the mandrel to the mandrel side grinding device (3), the mandrel end face grinding device (4) and the discharging device (5). Mandrel side grinding device (3): Grinds the inner side and the outer side of the mandrel. Mandrel end face grinding device (4): Grinds the end face of the mandrel. Discharging device (5): Removes the mandrel from the mandrel transfer device (2). The mandrel loading device (1) includes a loading belt (11), a guide plate (12), a blocking cylinder (13), a blocking block (131), a fixing cylinder (14), a fixing block (141), a detector (142), a flipping member (15), a first transfer mechanism (16), a transition table (17), a rotating member (18) and a second transfer mechanism (19). The guide plate (12) is arranged on the loading belt (11) and forms a passing opening (123) for a single mandrel to pass through horizontally. The blocking cylinder (13) drives the blocking block (131) to move in a direction perpendicular to the conveying direction of the loading belt (11). The blocking block (131) has a blocking position opposite to the passing opening (123) to block the mandrel from moving forward. The fixing cylinder (14) drives the fixing block (141) to move in a direction parallel to the conveying direction of the loading belt (11), and the fixing block (141) is located at the end of the loading belt (11). The fixing block (141) has a detection position opposite to the passing opening (123) to clamp the end face protrusion of the mandrel. The detector (142) is arranged on the fixing block (141) and is used to detect the mandrel. The transition table (17) has a transition carrier (171). The first transfer mechanism (16) drives the flipping member (15) to move. The flipping member (15) has a material taking position opposite to the detection position and a transition position opposite to the transition carrier (171). The flipping member (15) has a flipping state for flipping the mandrel. The second transfer mechanism (19) drives the rotating member (18) to move. The rotating member (18) has a material transferring position opposite to the transition table (17) and a feeding position opposite to the mandrel transfer device (2). The rotating member (18) has an angle adjustment state for rotating the mandrel. The rotating member (18) includes a rotating cylinder (181), a rotating shaft (182) and a fixed shaft (183). The second transfer mechanism (19) includes a clamping cylinder (184). The clamping cylinder (184) has a left clamping block (185) and a right clamping block (186). The fixed shaft (183) is arranged on the right clamping block (186) and is located relatively close to the left clamping block (185). The rotating shaft (182) is arranged on the left clamping block (185) and is located relatively close to the right clamping block (186). The rotating cylinder (181) is arranged on the other side of the left clamping block (185) relative to the rotating shaft (182). The rotating cylinder (181) has a driving shaft located inside the rotating shaft (182).

2. The automatic grinding device for an automotive seat belt mandrel according to claim 1, characterized in that: The described guiding plate (12) includes a first guiding plate (121) and a second guiding plate (122). The first guiding plate (121) is arranged on the side of the loading tape (11) and along the conveying direction of the loading tape (11). The second guiding plate (122) has a first parallel part (1221), an inclined connecting part (1222) and a second parallel part (1223). The first parallel part (1221) is arranged on the other side of the loading tape (11) relative to the first guiding plate (121). The second parallel part (1223) is parallel to the first guiding plate (121) and the distance between the second parallel part (1223) and the first guiding plate (121) is less than the distance between the first parallel part (1221) and the first guiding plate (121). The inclined connecting part (1222) connects the first parallel part (1221) and the second parallel part (1223). A passing port (123) for a single mandrel to pass through is formed between the first guiding plate (121) and the second parallel part (1223).

3. An automatic grinding device for an automobile seat belt mandrel according to claim 1, characterized in that: The described mandrel transmission device (2) includes a transmission belt (21) and a transmission carrier (22). The transmission belt (21) has a conveying state for conveying the transmission carrier (22) along the transmission belt (21). The transmission carrier (22) has a receiving position opposite to the mandrel loading device (1), a side grinding position opposite to the mandrel side grinding device (3), an end face grinding position opposite to the mandrel end face grinding device (4), and a discharging position opposite to the discharging device (5).

4. An automatic polishing device for an automobile seat belt spindle according to claim 3, characterized in that: The described mandrel side grinding device (3) includes a side grinding machine (31), a side grinding head (32), a locking block (33) and a locking cylinder (34). The side grinding machine (31) drives the side grinding head (32) to move and grind the side of the mandrel. The locking cylinders (34) are respectively arranged on both sides of the transmission belt (21) and drive the locking blocks (33) to move vertically. A grinding port (35) opposite to the side grinding position is arranged on the locking block (33), and a fixing part (36) abutted against the end face of the mandrel is arranged on the side of the grinding port (35).

5. The automatic grinding equipment for the core shaft of an automotive seat belt according to claim 4, characterized in that: It further includes a suction head (37), and the suction head (37) has a cleaning state opposite to the grinding port (35) for sucking miscellaneous materials.

6. The automatic grinding device for the core shaft of an automotive seat belt according to claim 3, wherein: The described mandrel end face grinding device (4) includes a pushing cylinder (41), a pushing seat (42), an end face grinding machine (43), an end face grinding head (44) and a pre-pressing part (45). The pushing cylinder (41) drives the pushing seat (42) to move in the direction of approaching and departing from the transmission belt (21). The end face grinding machine (43) is arranged on the pushing seat (42) and drives the end face grinding head (44) to move. The pre-pressing part (45) is arranged at the end face grinding position to fix the mandrel.

7. An automatic grinding device for an automotive seat belt mandrel according to claim 3, characterized in that: The described discharging device (5) includes a discharging chute (51) and a discharging gripper (52). The discharging gripper (52) has a material taking position opposite to the discharging position and a discharging position opposite to the discharging chute (51).

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