Automatic grinding equipment for mandrel of automobile safety belt

Abstract

The invention relates to automatic grinding equipment for automobile safety belt mandrels, which comprises a mandrel feeding device, a mandrel conveying device, a mandrel side face grinding device, a mandrel end face grinding device and a discharging device, and the mandrel feeding device is used for feeding mandrels and conveying the mandrels to the mandrel conveying device; the mandrel conveying device is used for receiving the mandrels and sequentially transferring the mandrels to the mandrel side face grinding device, the mandrel end face grinding device and the discharging device; the mandrel side face grinding device is used for grinding the inner side face and the outer side face of the mandrel; the mandrel end face grinding device is used for grinding the end face of the mandrel; and the unloading device is used for moving the mandrels out of the mandrel conveying device.

Description

Technical Field

[0001] The invention relates to a grinding device, in particular to an automatic grinding device for a car safety belt mandrel. Background Art

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

[0003] After the mandrel is manufactured, the inside, outside and both ends of the mandrel need to be polished to remove burrs. However, the polishing is currently done manually, which has low work efficiency and poor results. In the automated process, since the position of the mandrel is required during the polishing process, its position needs to be adjusted during loading. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide an automatic grinding device for a car safety belt mandrel.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: it includes a mandrel feeding device, a mandrel transmission device, a mandrel side grinding device, a mandrel end face grinding device and a unloading device, the mandrel feeding device: loading the mandrel and transferring the mandrel to the mandrel transmission device; the mandrel transmission device: receiving the mandrel and transferring the mandrel to the mandrel side grinding device, the mandrel end face grinding device and the unloading device in sequence; the mandrel side grinding device: grinding the inner side and outer side of the mandrel; the mandrel end face grinding device: grinding the end face of the mandrel; the unloading device: moving the mandrel out of the mandrel transmission device; the mandrel feeding device includes a feeding belt, a guide plate, a blocking cylinder, a blocking block, a fixed cylinder, a fixed block, a detector, a flip part, a first transfer mechanism, a transition table, a rotating part and a second transfer mechanism, the guide plate is arranged on the feeding belt and forms a single mandrel A through-port for passing horizontally, a blocking cylinder drives the blocking block to move in a direction perpendicular to the conveying direction of the feeding belt, the blocking block has a blocking position opposite to the through-port and blocks the core shaft from continuing to move forward, the fixed cylinder drives the fixed block to move in a direction parallel to the conveying direction of the feeding belt and the fixed block is located at the end of the feeding belt, the fixed block has a detection position opposite to the through-port and clamps the protrusion of the end face of the core shaft, the detector is arranged on the fixed block and is used to detect the core shaft, the transition table has a transition carrier, the first transfer mechanism drives the flipping member to move, the flipping member has a material picking position opposite to the detection position and a transition position opposite to the transition carrier, the flipping member has a flipping state for flipping the core shaft, 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 core shaft transmission device, and the rotating member has an angle adjustment state for rotating the core shaft.

[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 guide plate and then passes through the through port. After the first mandrel passes through the position of the blocking block, the blocking cylinder drives the blocking member to block the next mandrel. At the same time, the first mandrel moves to a position relative 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 differences in the clamping of the fixed block, which can be detected by the detector. If the direction is incorrect, the directions of the two end faces are swapped by the flipping member, and then the mandrel is transferred to the transition carrier by the first transfer mechanism. If it is wrong, If the direction is correct, the first transfer mechanism directly transfers the mandrel to the transition carrier, and then the rotating part clamps the mandrel and rotates it to make it rotate to the appropriate position, and then the second transfer mechanism transfers the mandrel to the mandrel transmission device, and the mandrel transmission device successively transfers the mandrel to the mandrel side grinding device for grinding the inner and outer sides, and then transfers it to the mandrel end face grinding device to grind the two end faces of the mandrel, and finally transfers it to the unloading device for unloading. First, the guide plate makes the mandrel drive along the direction of the feeding belt and is parallel to the feeding belt, and then the detector and the flip part ensure that the direction of its two end faces is correct, and finally the rotating part ensures the correctness of the side angle, thereby ensuring the posture of the mandrel.

[0007] The present invention is further configured as follows: the guide plate includes a first guide plate and a second guide plate, the first guide plate is arranged on the side of the loading belt and arranged along the conveying direction of the loading belt, the second guide plate has a first parallel portion, an oblique connecting portion and a second parallel portion, the first parallel portion is arranged on the other side of the loading belt relative to the first guide plate, the second parallel portion is parallel to the first guide plate and the distance between the second parallel portion and the first guide plate is smaller than the distance between the first parallel portion and the first guide plate, the oblique connecting portion connects the first parallel portion with the second parallel portion, and a passage for a single core shaft to pass through is formed between the first guide plate and the second parallel portion.

[0008] By adopting the above technical solution, when the core shaft is placed into the loading belt, it is located between the first guide plate and the first parallel portion, then abuts against the oblique connecting portion, and gradually approaches the second parallel portion until the core shaft rotates to the passage between the second parallel portion and the first guide plate.

[0009] The present invention is further configured as follows: the rotating part 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 located relatively close to the left clamping block, the rotating shaft is arranged on the left clamping block and is located 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, and the rotating cylinder has a driving shaft located inside the rotating shaft.

[0010] By adopting the above technical solution, when the axial angle of the core shaft needs to be adjusted, the clamping cylinder drives the left clamping block and the right clamping block to clamp the core shaft. At this time, the rotating shaft and the fixed shaft are respectively against the core shaft, and the driving shaft in the rotating shaft is against the protrusion on the end face of the core shaft, and then the rotating cylinder drives the core shaft to rotate through the driving shaft.

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

[0012] The present invention is further configured as follows: the core shaft side grinding device includes a side grinder, a side grinding head, a locking block, and a locking cylinder. The side grinder drives the side grinding head to move and grind the side of the core shaft. The locking cylinders are respectively arranged on both sides of the conveyor belt and drive the locking block to move vertically. The locking block is provided with a grinding port opposite to the side grinding position, and a fixing portion that abuts against the end face of the core shaft is provided on the side of the grinding port. There can be two core shaft 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 the side needs to be polished, the conveyor belt moves the transmission carrier with the core shaft to the side polishing position, and then the locking cylinder drives the locking block to move downward until the fixing part abuts against the end face of the core shaft. At this time, the core shaft is fixed, and then the side polishing head is driven by the side grinder to polish the inner and outer sides of the core shaft.

[0014] The present invention is further configured to include a suction head, which is in a cleaning state opposite to the grinding port and sucks up the debris.

[0015] By adopting the above technical solution, the suction head can absorb the debris generated by grinding.

[0016] The present invention is further configured as follows: the core shaft end face grinding device includes a pushing cylinder, a pushing seat, an end face grinding machine, an end face grinding head and a pre-pressing piece, the pushing cylinder drives the pushing seat to move in a direction approaching and away from the conveyor belt, the end face grinding machine is arranged on the pushing seat and drives the end face grinding head to move, and the pre-pressing piece is arranged at the end face grinding position and fixes the core shaft.

[0017] By adopting the above technical solution, when the end face needs to be polished, the pre-pressed part first fixes the mandrel at the end face polishing position, and then the cylinder drives the push seat to approach the conveyor belt, and then the end face polishing machine drives the end face polishing head to polish the end face of the mandrel.

[0018] The present invention is further configured as follows: the unloading device comprises a unloading chute and a unloading claw, and the unloading claw has a material taking position opposite to the unloading position and a unloading position opposite to the unloading chute. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the mandrel feeding device of the present invention; Figure 3 It is a structural schematic diagram of the rotating member and the second transfer mechanism of the present invention; Figure 4 It is a structural schematic diagram of the core shaft side grinding device of the present invention; Figure 5 It is a structural schematic diagram of the core shaft end surface grinding device of the present invention.

[0020] In the figure: 1, mandrel feeding device; 11, feeding belt; 12, guide plate; 121, first guide plate; 122, second guide plate; 1221, first parallel portion; 1222, oblique connecting portion; 1223, second parallel portion; 123, through port; 13, blocking cylinder; 131, blocking block; 14, fixed cylinder; 141, fixed block; 142, detector; 15, turning member; 16, first transfer mechanism; 17, transition platform; 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 grinder; 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 grinder; 44, end face grinding head; 45, pre-pressing part; 5, unloading device; 51, unloading chute; 52, unloading claw. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figure 1-5As shown, the present invention discloses an automatic grinding device for a car safety belt mandrel, comprising a mandrel feeding device 1, a mandrel transmission device 2, a mandrel side grinding device 3, a mandrel end face grinding device 4 and a discharge device 5, wherein the mandrel feeding device 1 is used to feed the mandrel and transmit the mandrel to the mandrel transmission device 2; the mandrel transmission device 2 is used to receive the mandrel and transmit the mandrel to the mandrel side grinding device 3, the mandrel end face grinding device 4 and the discharge device 5 in sequence; the mandrel side grinding device 3 is used to grind the inner side and outer side of the mandrel; the mandrel end face grinding device 4 is used to grind the end face of the mandrel; the discharge device 5 is used to remove the mandrel from the mandrel transmission device 2;The core shaft feeding device 1 includes a feeding belt 11, a guide plate 12, a blocking cylinder 13, a blocking block 131, a fixed cylinder 14, a fixed block 141, a detector 142, a flip 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 feeding belt 11 and forms a through hole 123 for a single core shaft to pass through laterally. The blocking cylinder 13 drives the blocking block 131 to move in a direction perpendicular to the transmission direction of the feeding belt 11. The blocking block 131 has a blocking position opposite to the through hole 123 and blocks the core shaft from continuing to move forward. The fixed cylinder 14 drives the fixed block 141 to move in a direction parallel to the transmission direction of the feeding belt 11 and the fixed block 141 is located at the end of the feeding belt 11. The fixed block 141 has a detection position opposite to the through port 123 and clamps the protrusion of the end face of the mandrel. The detector 142 is arranged on the fixed block 141 and is used to detect the mandrel. The transition platform 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 transfer position opposite to the transition platform 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 feeding belt 11. The first mandrel is moved to a position relative to the fixed block 141, and then the fixed 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, the fixed block 141 will have differences when clamping, which can be detected by the detector 142. If the direction is wrong, the directions of the two end faces are swapped by the flipping member 15, and then the mandrel is transferred to the transition carrier 171 by the first transfer mechanism 16. If the direction is correct, it is directly transferred by the first transfer mechanism 16 to the transition carrier 171. The structure 16 transfers the mandrel to the transition carrier 171, and then the rotating member 18 clamps the mandrel and rotates it 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 grinding device 3 for grinding the inner and outer sides, and then transfers it to the mandrel end face grinding device 4 to grind the two end faces of the mandrel, and finally transfers it to the unloading device 5 for unloading. First, the guide plate 12 drives the mandrel along the direction of the feeding belt 11 and is parallel to the feeding belt 11, and then the detector 142 and the flip member 15 ensure that the direction of its two end faces is correct, and finally the rotating member 18 ensures that its side angle is correct, thereby ensuring the position of the mandrel. ;

[0024] The guide plate 12 includes a first guide plate 121 and a second guide plate 122. The first guide plate 121 is disposed on the side of the feeding belt 11 and arranged along the conveying direction of the feeding belt 11. The second guide plate 122 has a first parallel portion 1221, an oblique connecting portion 1222 and a second parallel portion 1223. The first parallel portion 1221 is disposed on the other side of the feeding belt 11 relative to the first guide plate 121. The second parallel portion 1223 is parallel to the first guide plate 121 and the distance between the second parallel portion 1223 and the first guide plate 121 is less than the distance between the first parallel portion 1221 and the first parallel portion 1223. The distance between the first guide plate 121 and the second parallel portion 1223 is formed by the oblique connecting portion 1222, and a through opening 123 for a single core shaft to pass through is formed between the first guide plate 121 and the second parallel portion 1223. When the core shaft is placed in the loading belt 11, it is located between the first guide plate 121 and the first parallel portion 1221, and then abuts against the oblique connecting portion 1222, and gradually approaches the second parallel portion 1223 until the core shaft rotates to enter the through opening 123 between the second parallel portion 1223 and the first guide plate 121.

[0025] 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 left clamping block 185 is relative to the other side of the rotating shaft 182, the rotating cylinder 181 has a driving shaft located in the rotating shaft 182. When the axial angle of the core shaft needs to be adjusted, the clamping cylinder 184 drives the left clamping block 185 and the right clamping block 186 to clamp the core shaft. At this time, the rotating shaft 182 and the fixed shaft 183 are respectively against the core shaft, and the driving shaft in the rotating shaft 182 is against the protrusion on the end face of the core shaft, and then the rotating cylinder 181 drives the core shaft to rotate through the driving shaft.

[0026] The core shaft transmission device 2 includes a conveyor belt 21 and a conveyor carrier 22. The conveyor belt 21 has a conveying state of conveying the conveyor carrier 22 along the conveyor belt 21. The conveyor carrier 22 has a receiving position relative to the core shaft loading device 1, a side grinding position relative to the core shaft side grinding device 3, an end face grinding position relative to the core shaft end face grinding device 4, and a unloading position relative to the unloading device 5.

[0027] The spindle side grinding device 3 includes a side grinder 31, a side grinding head 32, a locking block 33, and a locking cylinder 34. The side grinder 31 drives the side grinding head 32 to move and grind the side of the spindle. The locking cylinders 34 are respectively arranged on both sides of the conveyor belt 21 and drive the locking block 33 to move vertically. A grinding port 35 opposite to the side grinding position is arranged on the locking block 33, and a fixing portion 36 abutting against the end face of the spindle is arranged on the side of the grinding port 35. The spindle side grinding device 3 can be two, one for grinding the outer side and the other for grinding the inner side. When it is necessary to grind the side, the conveyor belt 21 moves the transmission carrier 22 with the spindle to the side grinding position, and then the locking cylinder 34 drives the locking block 33 to move downward until the fixing portion 36 abuts against the end face of the spindle. At this time, the spindle is fixed, and then the side grinder 31 drives the side grinding head 32 to grind the inner and outer sides of the spindle.

[0028] The suction head 37 is also included. The suction head 37 can be in a cleaning state opposite to the grinding port 35 and suck up the debris. The suction head 37 can suck up the debris generated by grinding.

[0029] The core shaft 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 piece 45. The pushing cylinder 41 drives the pushing seat 42 to move in the direction of approaching 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 pre-pressing piece 45 is arranged at the end face grinding position and fixes the core shaft. When the end face needs to be ground, the pre-pressing piece 45 first fixes the core shaft at the end face grinding position, and 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 core shaft.

[0030] The unloading device 5 comprises an unloading chute 51 and a unloading jaw 52 . The unloading jaw 52 has a material taking position opposite to the unloading position and a unloading position opposite to the unloading chute 51 .

[0031] Working process: When the mandrel needs to be polished, the mandrel is placed on the feeding belt 11, and then 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 it abuts against the oblique connecting part 1222, and gradually approaches the second parallel part 1223, until the mandrel rotates to the through opening 123 between the second parallel part 1223 and the first guide plate 121, and after the first mandrel passes the position of the blocking block 131, the blocking cylinder 13 drives the blocking member to block the next mandrel At the same time, the first mandrel moves to a position relative to the fixed block 141, and then the fixed 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, the fixed block 141 will have differences when clamping, which can be detected by the detector 142. If the direction is wrong, the directions of the two end faces are swapped by the flip member 15, and then the mandrel is transferred to the transition carrier 171 by the first transfer mechanism 16. If the direction is correct, the mandrel is directly transferred to the transition carrier 171 by the first transfer mechanism 16. The 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 are respectively against the mandrel, and the driving shaft in the rotating shaft 182 is against the protrusion on the end face of the mandrel, and then the rotating cylinder 181 drives the mandrel to rotate through the driving shaft to rotate it 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 grinding device 3, and then the locking cylinder 34 drives The dynamic locking block 33 moves downward until the fixing portion 36 abuts against the end face of the mandrel, at which time the mandrel is fixed, and then the side grinder 31 drives the side grinding head 32 to grind the inner and outer sides of the mandrel, and then transmits it to the mandrel end face grinding device 4, firstly the pre-pressing part 45 fixes the mandrel at the end face grinding position, and then the cylinder 41 drives the pushing seat 42 to approach the conveyor belt 21, and then the end face grinder 43 drives the end face grinding head 44 to grind the end face of the mandrel, and finally transmits it to the unloading device 5 for unloading.

Claims

1. An automatic grinding device for a car seat belt mandrel, characterized in that: It comprises a mandrel feeding device (1), a mandrel transmission device (2), a mandrel side grinding device (3), a mandrel end surface grinding device (4) and a discharging device (5), A mandrel feeding device (1) for feeding the mandrel and transferring the mandrel to a mandrel transmission device (2); A mandrel transmission device (2) receives the mandrel and sequentially transmits the mandrel to the mandrel side grinding device (3), the mandrel end grinding device (4) and the unloading device (5); Mandrel side grinding device (3): grinding the inner side and outer side of the mandrel; Mandrel end face grinding device (4): grinding the end face of the mandrel; A discharge device (5) is used to remove the mandrel from the mandrel transmission device (2); The core shaft feeding device (1) comprises a feeding belt (11), a guide plate (12), a blocking cylinder (13), a blocking block (131), a fixed cylinder (14), a fixed 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), wherein the guide plate (12) is arranged on the feeding belt (11) and forms a through opening (123) for a single core shaft to pass through laterally, the blocking cylinder (13) drives the blocking block (131) to move in a direction perpendicular to the conveying direction of the feeding belt (11), the blocking block (131) has a blocking position opposite to the through opening (123) and blocks the core shaft from continuing to move forward, the fixed cylinder (14) drives the fixed block (141) to move in a direction parallel to the conveying direction of the feeding belt (11) and is fixed The fixed block (141) is located at the end of the feeding belt (11), the fixed block (141) has a detection position opposite to the through port (123) and clamping the protrusion of the core shaft end surface, the detector (142) is arranged on the fixed block (141) and is used to detect the core shaft, 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 picking 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 core shaft, the second transfer mechanism (19) drives the rotating member (18) to move, the rotating member (18) has a material transfer position opposite to the transition table (17) and a material feeding position opposite to the core shaft transmission device (2), and the rotating member (18) has an angle adjustment state for rotating the core shaft.

2. The automatic grinding device for automobile safety belt mandrel according to claim 1 is characterized in that: The guide plate (12) comprises a first guide plate (121) and a second guide plate (122), wherein the first guide plate (121) is arranged on the side of the feeding belt (11) and is arranged along the conveying direction of the feeding belt (11), and the second guide plate (122) comprises a first parallel portion (1221), an oblique connecting portion (1222) and a second parallel portion (1223), wherein the first parallel portion (1221) is arranged on the other side of the feeding belt (11) relative to the first guide plate (121), and the second parallel portion (1223) is arranged on the other side of the feeding belt (11) relative to the first guide plate (121). The parallel portion (1223) is parallel to the first guide plate (121), and the distance between the second parallel portion (1223) and the first guide plate (121) is smaller than the distance between the first parallel portion (1221) and the first guide plate (121), the oblique connecting portion (1222) connects the first parallel portion (1221) and the second parallel portion (1223), and a through opening (123) for a single core shaft to pass through is formed between the first guide plate (121) and the second parallel portion (1223).

3. The automatic grinding device for automobile safety belt mandrel according to claim 1 is characterized in that: The rotating member (18) comprises a rotating cylinder (181), a rotating shaft (182) and a fixed shaft (183); the second transfer mechanism (19) comprises a clamping cylinder (184); the clamping cylinder (184) comprises 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); and the rotating cylinder (181) has a driving shaft located inside the rotating shaft (182).

4. The automatic grinding device for automobile safety belt mandrel according to claim 1 is characterized in that: The mandrel transmission device (2) comprises a transmission belt (21) and a transmission carrier (22); the transmission belt (21) has a transmission state for transmitting the transmission carrier (22) along the transmission belt (21); the transmission carrier (22) has a receiving position relative to the mandrel feeding device (1), a side grinding position relative to the mandrel side grinding device (3), an end face grinding position relative to the mandrel end face grinding device (4), and a unloading position relative to the unloading device (5).

5. The automatic grinding device for automobile safety belt mandrel according to claim 4 is characterized in that: The spindle side grinding device (3) comprises 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 spindle. The locking cylinder (34) is respectively arranged on both sides of the conveyor belt (21) and drives the locking block (33) to move vertically. The locking block (33) is provided with a grinding opening (35) opposite to the side grinding position. The side of the grinding opening (35) is provided with a fixing portion (36) that abuts against the end face of the spindle.

6. The automatic grinding device for automobile safety belt mandrel according to claim 5, characterized in that: The device also includes a suction head (37), which is in a cleaning state opposite to the grinding opening (35) and sucks up the debris.

7. The automatic grinding device for automobile safety belt mandrel according to claim 4, characterized in that: The spindle end face grinding device (4) comprises a driving cylinder (41), a driving seat (42), an end face grinding machine (43), an end face grinding head (44) and a pre-pressing piece (45); the driving cylinder (41) drives the driving seat (42) to move in a direction approaching and moving away from the conveyor belt (21); the end face grinding machine (43) is arranged on the driving seat (42) and drives the end face grinding head (44) to move; and the pre-pressing piece (45) is arranged at the end face grinding position and fixes the spindle.

8. The automatic grinding device for automobile safety belt mandrel according to claim 4, characterized in that: The unloading device (5) comprises a unloading chute (51) and a unloading clamp (52); the unloading clamp (52) has a material taking position opposite to the unloading position and a unloading position opposite to the unloading chute (51).

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