Automatic material distribution mechanism for positioning pin sleeve

Abstract

The present invention relates to the technical field of positioning pin sleeve processing, and discloses an automatic material distribution mechanism for positioning pin sleeves, comprising a feeding mechanism, a positioning pin and a pin sleeve. A screening mechanism capable of screening out vertically positioned pin sleeves is provided on one side of the feeding mechanism, and a pin sleeve assembling mechanism capable of assembling the positioning pin and the pin sleeve is provided on one side of the screening mechanism. The beneficial effect of the present invention compared with the prior art lies in that: by setting a plurality of hoppers and connecting them with auxiliary material distribution slots to carry the pin sleeves, a plurality of auxiliary material distribution slots can work simultaneously to store the screened pin sleeves when screening the pin sleeves, that is, when a pin sleeve gap appears on the main material distribution slot, the auxiliary material distribution slot selection blocks can be rotated in turn to allow the pin sleeves on each auxiliary material distribution slot to be quickly and sequentially transported to the main material distribution slot, which can avoid the situation where the assembly of the pin sleeves and the positioning pins is stagnant under high production demand, affecting the assembly output speed of the positioning pins and the pin sleeves, thereby ensuring production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of positioning pin sleeve processing, in particular to an automatic material dividing mechanism for a positioning pin sleeve. Background Art

[0002] A locating pin is a mechanical part used to determine the correct position of components during assembly, ensuring precise fit and relative positioning. There are many types of locating pins, depending on their material and purpose. For example, silicon nitride locating pins are suitable for high-temperature, high-pressure, and high-speed environments and are widely used in vehicle manufacturing, mold processing, and other fields.

[0003] Install the pin sleeve to the predetermined position. The pin sleeve is usually a component with a tapered or form-fitting inner hole. It can be assembled by press fitting or rotation. Use a special tool to insert the locating pin into the pin sleeve to achieve the assembly of the locating pin and the pin sleeve.

[0004] The existing automatic dowel pin sleeve dispensing mechanism is an automated device used to automatically separate and distribute dowel pin sleeves during industrial production processes to improve production efficiency and reduce labor costs. This mechanism is typically used in the assembly process of large-scale production lines. The main steps are:

[0005] The positioning pin sleeves are separated from the raw materials or storage containers and sent to the next link at a certain rhythm and speed, such as the silo, vibrating plate, etc., for storing and transporting the positioning pin sleeves, and the separated positioning pin sleeves are transported to the designated assembly position.

[0006] However, in the prior art, when the pin sleeves in the hopper are transported to the vibrating plate for screening, a part of the pin sleeves will be screened out and fall when the pin sleeves with the correct posture are screened out, so that a gap will appear between the two pin sleeves when the screened pin sleeves are transported. In the prior art, since the assembly speed of the positioning pins and the pin sleeves is lower than the screening material discharge speed, there will be no assembly interruption. However, when the assembly speed of the positioning pins and the pin sleeves is higher than the screening material discharge speed, there will be a situation where there are no pin sleeves to assemble, causing assembly stagnation, which will affect the assembly output speed of the positioning pins and the pin sleeves and affect production. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the above difficulties and provide an automatic material distribution mechanism for positioning pin sleeves.

[0008] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0009] An automatic material distribution mechanism for positioning pin sleeves, comprising a feeding mechanism, positioning pins, and pin sleeves. One side of the feeding mechanism is provided with a screening mechanism capable of screening out vertically positioned pin sleeves. Another side of the screening mechanism is provided with a pin sleeve assembly mechanism capable of assembling the positioning pins and the pin sleeves.

[0010] The feeding mechanism includes a frame, a rotating drum is rotatably provided in the frame, the screening mechanism includes a return member slidingly fitted with the rotating drum and a plurality of hoppers located in the rotating drum, a main material distribution groove is provided between the screening mechanism and the pin sleeve assembly mechanism, and one end of each hopper is provided with an auxiliary material distribution groove merging in the direction of the main material distribution groove, and an adjusting groove is provided at the connection between the auxiliary material distribution groove and the main material distribution groove;

[0011] An auxiliary slot selection block is rotatably provided in the adjusting groove, which allows the pin sleeve of one of the multiple auxiliary material distribution slots to pass through. The auxiliary slot selection block is provided with a rotating rod rotatably connected to the fixed frame and has a pin sleeve slot inside. The top of the rotating rod slides through a cross bar, and the return material piece is provided with a frame plate, and three slots corresponding to the auxiliary material distribution slots are provided on the frame plate, and a block is provided at the end of the cross bar to engage with the slot.

[0012] As an improvement, the pin sleeve assembly mechanism includes a processing table, on which a fan-shaped block is provided for reciprocating rotation, the arc surface at the end of the fan-shaped block is tightly fitted and slidably connected to the end of the main material distribution slot, the processing table is provided with a limit rod located inside the fan-shaped block, the side end of the fan-shaped block is provided with a limit shell, a material removal plate is hinged in the limit shell, a spring sheet is provided between the material removal plate and the limit shell, and the end of the material removal plate is provided with a material removal slot for removing the pin sleeve from the main material distribution slot.

[0013] As an improvement, the pin sleeve assembly mechanism includes a positioning pin conveying trough located on the processing table, and the end of the positioning pin conveying trough is provided with two end blocks located directly above the material trough, and a material placing plate that can clamp the positioning pin is hinged in the end block, and a spring sheet 2 is provided between the material placing plate and the end block.

[0014] As an improvement, the pin sleeve assembly mechanism includes a side plate located on the processing table, a sliding rod is provided on the side plate, a spring 2 and a slider are provided on the sliding rod, one end of the slider is in contact with the spring 2 and is located on the sliding rod close to the positioning pin conveying groove, an electric telescopic rod is provided at the bottom of the slider, a motor is provided at the bottom of the electric telescopic rod, a transmission rod is provided at the output end of the motor, and an end head is provided at the bottom of the transmission rod that can cooperate with the positioning pin and is located directly above the end block.

[0015] As an improvement, the feeding mechanism includes a base, the frame is located on the base, a driving wheel is provided inside, a driving device for driving the driving wheel to rotate is provided on the base, driven wheels are evenly arranged in the frame on both sides of the driving wheel, the rotating drum is in rolling connection with the driving wheel and the driven wheels, and a number of lifting plates are provided inside.

[0016] As an improvement, the cross bar is provided with a spring located between the block and the rotating rod, the other end of the cross bar is provided with a handle, and the bottom of the main material distribution groove is provided with a fixing seat fixedly connected to the return material piece.

[0017] As an improvement, a material tapper is rotatably provided on the frame plate, and the distance between the bottom end of the material tapper and the three auxiliary material distribution slots can allow the pin sleeve in a vertical posture to pass through, but prevent the pin sleeve in a horizontal posture from passing through.

[0018] The beneficial effects of the present invention compared with the prior art are:

[0019] 1. By setting up multiple hoppers and connecting them with auxiliary material distribution slots to carry pin sleeves, auxiliary slot selection blocks are set at the connection points between the multiple auxiliary material distribution slots and the main material distribution slot, so that when screening the pin sleeves, the multiple auxiliary material distribution slots can work simultaneously to store the screened pin sleeves. That is, when a pin sleeve gap appears on the main material distribution slot, the auxiliary slot selection blocks can be rotated in sequence to quickly transport the pin sleeves on each auxiliary material distribution slot to the main material distribution slot in sequence. This can avoid the situation where the assembly of pin sleeves and positioning pins is stalled under high production demand, affecting the assembly output speed of positioning pins and pin sleeves, thereby ensuring production efficiency;

[0020] 2. When high production is required, the working speed of the pin sleeve assembly mechanism can be directly increased, while the feeding mechanism does not need to be accelerated if it can work simultaneously to store the screened pin sleeves. When low production is required, the rotation speed of the feeding mechanism can be reduced. Compared with the prior art in which the power of the feeding mechanism is constant, the present invention has the beneficial effect of reducing energy consumption.

[0021] 3. By arranging a lifting plate in the rotating drum, the lifting plate in the present invention is different from the straight plate-shaped lifting plate in the prior art, which can greatly improve the feeding efficiency of the pin sleeve and ensure the efficiency of the pin sleeve screening when combined with multiple hoppers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the automatic material distribution mechanism of the positioning pin sleeve of the present invention. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the automatic material distribution mechanism of the positioning pin sleeve of the present invention. Figure 2 .

[0024] Figure 3 This is a schematic diagram of the disassembly of the automatic material distribution mechanism of the positioning pin sleeve of the present invention Figure 1 .

[0025] Figure 4 This is a schematic diagram of the disassembly of the automatic material distribution mechanism of the positioning pin sleeve of the present invention Figure 2 .

[0026] Figure 5 It is a schematic diagram of a screening mechanism of an automatic material dividing mechanism of a positioning pin sleeve of the present invention.

[0027] Figure 6This is a partial schematic diagram of the automatic material separation mechanism and screening mechanism of the positioning pin sleeve of the present invention. Figure 1 .

[0028] Figure 7 This is a partial schematic diagram of the automatic material separation mechanism and screening mechanism of the positioning pin sleeve of the present invention. Figure 2 .

[0029] Figure 8 This invention is a positioning pin sleeve automatic material distribution mechanism Figure 5 Schematic diagram in middle A.

[0030] Figure 9 It is a schematic diagram of a secondary through slot selection block of an automatic material distribution mechanism of a positioning pin sleeve of the present invention.

[0031] Figure 10 It is a schematic diagram of a pin sleeve assembly mechanism of an automatic material distribution mechanism for a positioning pin sleeve of the present invention.

[0032] Figure 11 It is a partial schematic diagram of a pin sleeve assembly mechanism of an automatic material distribution mechanism for a positioning pin sleeve of the present invention.

[0033] Figure 12 It is a schematic diagram of a sector block of an automatic material distribution mechanism of a positioning pin sleeve of the present invention.

[0034] Figure 13 It is a schematic diagram of an end block of an automatic material distribution mechanism of a positioning pin sleeve of the present invention.

[0035] Figure 14 It is a schematic diagram of a feeding mechanism of an automatic material distribution mechanism for a positioning pin sleeve of the present invention.

[0036] Figure 15 It is a schematic diagram of a rotating drum of an automatic material distribution mechanism of a positioning pin sleeve of the present invention.

[0037] As shown in the figure: 1. Feeding mechanism; 101. Base; 102. Frame; 103. Driving wheel; 104. Driving device; 105. Driven wheel; 106. Rotating drum; 107. Lifting plate; 2. Screening mechanism; 201. Return material; 202. Shelf; 203. Hopper; 204. Auxiliary material distribution slot; 205. Adjusting groove; 206. Fixing frame; 207. Auxiliary slot selection block; 208. Pin sleeve slot; 209. Rotating rod; 210. Crossbar; 211. Block; 212. Slot; 213. Spring 1; 214. Handle; 2 15. Material feeder; 216. Fixed seat; 3. Pin sleeve assembly mechanism; 301. Processing table; 302. Fan-shaped block; 303. Limit rod; 304. Limit shell; 305. Material feeding plate; 306. Spring leaf 1; 307. Material feeding trough; 308. Positioning pin conveying trough; 309. End block; 310. Material placement plate; 311. Spring leaf 2; 312. Side plate; 313. Sliding rod; 314. Spring 2; 315. Slider; 316. Electric telescopic rod; 317. Motor; 318. Transmission rod; 319. End; 4. Main material distribution trough. DETAILED DESCRIPTION

[0038] The present invention will be described in further detail below with reference to the accompanying drawings.

[0039] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 As shown, an automatic material distribution mechanism for positioning pin sleeves includes a feeding mechanism 1, positioning pins, and pin sleeves. A screening mechanism 2 is provided on one side of the feeding mechanism 1 for screening out vertically positioned pin sleeves. A pin sleeve assembly mechanism 3 is provided on one side of the screening mechanism 2 for assembling the positioning pins and the pin sleeves.

[0040] The feeding mechanism 1 can transport the pin sleeve to the screening mechanism 2, the screening mechanism 2 can screen the pin sleeve, transport the correct pin sleeve to the pin sleeve assembly mechanism 3, and transport the incorrect pin sleeve back to the feeding mechanism 1 for further transportation. The pin sleeve assembly mechanism 3 can assemble the pin sleeve and the positioning pin.

[0041] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 6 , Attachment Figure 7 , Attachment Figure 14 , Attachment Figure 15As shown, the feeding mechanism 1 includes a base 101, the frame 102 is located on the base 101, and a driving wheel 103 is provided inside. The base 101 is provided with a driving device 104 for driving the driving wheel 103 to rotate. Driven wheels 105 are evenly arranged on both sides of the driving wheel 103 and are evenly arranged in the frame 102. The rotating drum 106 is in rolling connection with the driving wheel 103 and the driven wheel 105, and a plurality of lifting plates 107 are provided inside.

[0042] The feeding mechanism 1 includes a frame 102, a rotating drum 106 is rotatably installed in the frame 102, and the screening mechanism 2 includes a return member 201 slidingly fitted with the rotating drum 106 and a plurality of hoppers 203 located in the rotating drum 106;

[0043] A number of pin sleeves are placed in the rotating drum 106 and the driving device 104 is started. The driving device 104 drives the driving wheel 103 to rotate, and the driving wheel 103 drives the rotating drum 106 to rotate. At this time, the driven wheel 105 can rotate along with the rotating drum 106. When the rotating drum 106 rotates, the number of hoppers 203 in the present invention is three, and the internal lifting plate 107 can lift the pin sleeve to the top and then drop it into the three hoppers 203. The lifting plate 107 of the present invention is a right-angle plate that can carry more pin sleeves than the existing technology, thereby ensuring the conveying efficiency of the pin sleeves.

[0044] Combined with attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 As shown, a vibrator is provided at the bottom of the hopper 203, which is a prior art vibrator. A main material distribution groove 4 is provided between the screening mechanism 2 and the pin sleeve assembly mechanism 3. An auxiliary material distribution groove 204 merging in the direction of the main material distribution groove 4 is provided at one end of the hopper 203. An adjusting groove 205 is provided at the connection between the auxiliary material distribution groove 204 and the main material distribution groove 4. An auxiliary groove selection block 207 is rotatably provided in the adjusting groove 205, which allows the pin sleeve of one of the multiple auxiliary material distribution grooves 204 to pass through.

[0045] Start the vibrator. Under the action of the vibrator, the three hoppers 203 will vibrate, and the vibrating hoppers 203 will drive the pin sleeve to move. The auxiliary material distribution groove 204 and the main material distribution groove 4 of the present invention are both in a downward tilted state, so the pin sleeve will move from the hopper 203 to the auxiliary material distribution groove 204 under vibration. When the pin sleeve moves to the connecting point of the three auxiliary material distribution grooves 204, the auxiliary groove selection block 207 determines that a pin sleeve in the auxiliary material distribution groove 204 can pass through. The pin sleeve that passes through will be transported to the main material distribution groove 4, and transported to the pin sleeve assembly mechanism 3 through the main material distribution groove 4 for assembly with the positioning pin.

[0046] Combined with attachment Figure 8 , Attachment Figure 9As shown, the cross bar 210 is provided with a spring 213 located between the block 211 and the rotating rod 209, the auxiliary through-slot selection block 207 is provided with a rotating rod 209 rotatably connected to the fixed frame 206 and provided with a pin sleeve through-slot 208 inside, the top of the rotating rod 209 slides through the cross bar 210, the return material piece 201 is provided with a frame plate 202, the frame plate 202 is provided with three slots 212 corresponding to the auxiliary material distribution slots 204 one by one, the end of the cross bar 210 is provided with a block 211 engaged with the slot 212, the other end of the cross bar 210 is provided with a handle 214, and the bottom of the main material distribution slot 4 is provided with a fixing seat 216 fixedly connected to the return material piece 201;

[0047] When the production of finished products of pin sleeves and locating pins needs to be increased, the operating speed of the pin sleeve assembly mechanism 3 can be directly increased to increase the assembly speed of the pin sleeves and locating pins. At this time, the pin sleeves cannot be delivered to the production requirements only through one auxiliary material distribution slot 204. Since the pin sleeves in the other two auxiliary material distribution slots 204 have not been delivered and have been stored in the auxiliary material distribution slots 204, the cross bar 210 can be pulled by the handle 214. The cross bar 210 drives the block 211 to separate from the slot 212 and applies a lateral force to the handle 214 to deflect the handle 214 to the slot 212 corresponding to the other two auxiliary material distribution slots 204. Then release the hand, at this time the cross bar 210 drives the rotating rod 209 to make the auxiliary slot selection block 207 correspond to one of the other two auxiliary material slots 204, that is, the pin sleeve slot 208 corresponds to the auxiliary material slot 204, so that the pin sleeve can pass through. In this process, the stored pin sleeve can be immediately transported to the main material slot 4 without re-screening. Then continue to perform the above operation to make the pin sleeve in the third auxiliary material slot 204 also quickly transported to the main material slot 4, which can avoid the stagnation of the pin sleeve and locating pin assembly under high production demand, affecting the assembly output speed of the locating pin and pin sleeve, thereby ensuring production efficiency.

[0048] Combined with attachment Figure 4 , Attachment Figure 5 , Attachment Figure 8 As shown, a material distributor 215 is rotatably provided on the frame plate 202. The distance between the bottom end of the material distributor 215 and the three auxiliary material distribution slots 204 is such that a pin sleeve in a vertical position can pass through, but a pin sleeve in a horizontal position cannot pass through.

[0049] When the pin sleeve is divided and transported in the auxiliary material dividing groove 204, the distance between the bottom end of the material distributor 215 and the three auxiliary material dividing grooves 204 allows the pin sleeve in a vertical position to pass through, but prevents the pin sleeve in a horizontal position from passing through. The pin sleeve that cannot pass through will be moved and fall into the return material piece 201 under the rotation of the material distributor 215, and the pin sleeve will return to the rotating drum 106 through the return material piece 201 to continue circulation.

[0050] Combined with attachment Figure 5 , Attachment Figure 10 , Attachment Figure 11 , Attachment Figure 12 , Attachment Figure 13 , Attachment Figure 14 , Attachment Figure 15 As shown, the pin sleeve assembly mechanism 3 includes a processing table 301, on which a sector block 302 is provided for reciprocating rotation. The arc surface at the end of the sector block 302 is tightly fitted and slidably connected to the end of the main material distribution groove 4. A limiting rod 303 is provided on the processing table 301 and located in the sector block 302. A limiting shell 304 is provided at the side end of the sector block 302. A feeding plate 305 is hinged in the limiting shell 304. A spring sheet 306 is provided between the feeding plate 305 and the limiting shell 304. A feeding groove 307 for removing the pin sleeve from the main material distribution groove 4 is provided at the end of the feeding plate 305.

[0051] The pin sleeve assembly mechanism 3 includes a positioning pin conveying trough 308 located on the processing table 301. The end of the positioning pin conveying trough 308 is provided with two end blocks 309 located directly above the material taking trough 307. The end blocks 309 are hinged with a material holding plate 310 that can clamp the positioning pins. A second spring piece 311 is provided between the material holding plate 310 and the end blocks 309.

[0052] The pin sleeve assembly mechanism 3 includes a side plate 312 located on the processing table 301, a sliding rod 313 is provided on the side plate 312, a second spring 314 and a slider 315 are provided on the sliding rod 313, one end of the slider 315 is in contact with the second spring 314 and is located on the sliding rod 313 near the positioning pin conveying groove 308, an electric telescopic rod 316 is provided at the bottom of the slider 315, a motor 317 is provided at the bottom of the electric telescopic rod 316, a transmission rod 318 is provided at the output end of the motor 317, and an end 319 is provided at the bottom of the transmission rod 318 that can cooperate with the positioning pin and is located directly above the end block 309;

[0053] When the driving structure starts to drive the sector block 302 to rotate back and forth, when the sector block 302 rotates to one side and is in place, the material taking groove 307 on the material taking plate 305 on one side of the sector block 302 docks with the main material distribution groove 4. At this time, the pin sleeve on the main material distribution groove 4 will move from the main material distribution groove 4 to the material taking groove 307. At this time, the sector plate is reversed until it is in place. During this process, the main material distribution groove 4 and the sector plate are tightly fitted to prevent the pin sleeve on the main material distribution groove 4 from falling off, and the positioning pin can be moved by the processing table 30 1 is transported to the end block 309 by the positioning pin conveying groove 308. At this time, the positioning pin and the pin sleeve correspond to each other up and down. The electric telescopic rod 316 is started to extend. The electric telescopic rod 316 extends and drives the transmission rod 318 and the end head 319 to move downward through the motor 317. When the end head 319 contacts and docks with the positioning pin, the electric telescopic rod 316 continues to extend. When the positioning pin and the pin sleeve dock, the motor 317 is started. The motor 317 can drive the positioning pin to rotate. The positioning pin can be assembled with the pin sleeve during the rotation process.

[0054] When the cam 314 is in the process of being disengaged from the support 310, the support 310 will be in the form of a pin 316 which is in the process of being disengaged from the support 310. When the cam 314 is in the process of being disengaged from the support 310, the support 310 will be in the form of a pin 316 which is in the process of being disengaged from the support 310.

[0055] When the present invention is specifically implemented:

[0056] A number of pin sleeves are placed in the drum 106 and the driving device 104 is started. When the drum 106 rotates, the internal lifting plate 107 can lift the pin sleeve to the top and then drop it into the three hoppers 203. The vibrator is started to drive the pin sleeve to move. When the pin sleeve moves to the connection point of the three auxiliary material distribution slots 204, the auxiliary slot selection block 207 determines that the pin sleeve in an auxiliary material distribution slot 204 can pass through, and is transported to the pin sleeve assembly mechanism 3 through the main material distribution slot 4 for assembly with the positioning pin. When it is necessary to increase the output of the pin sleeve and the positioning pin assembly product, the pin sleeve cannot meet the production requirements by transporting it through an auxiliary material distribution slot 204. Since the pin sleeve has been stored in the auxiliary material distribution slot 204, the cross bar 210 can be pulled by the handle 214 to deflect the handle 214. At this time, the cross bar 210 drives the rotating rod 209 to make the auxiliary slot selection block 207 corresponds to one of the other two auxiliary material distribution slots 204, allowing the pin sleeve to pass through, and then the above operation is continued to make the pin sleeve in the third auxiliary material distribution slot 204 also quickly transported to the main material distribution slot 4. Since the material selector 215 prevents the pin sleeve in the horizontal posture from passing through, the pin sleeve that cannot pass through will be moved and dropped into the return material piece 201 under the rotation of the material selector 215. The sector block 302 rotates to one side and the material collection slot 307 on the material collection plate 305 on one side docks with the main material distribution slot 4. The pin sleeve will move into the material collection slot 307, and the sector plate is reversed into place. The locating pin can be transported to the end block 309 through the locating pin conveying slot 308 on the processing table 301, and the electric telescopic rod 316 is started to extend the end head 319 and move downward. When the locating pin is docked with the pin sleeve, the motor 317 is started to drive the locating pin to rotate and mate with the pin sleeve.

[0057] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs structures and embodiments similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A positioning pin sleeve automatic material feeding mechanism, comprising a feeding mechanism (1), a positioning pin, and a pin sleeve, characterized in that: A screening mechanism (2) capable of screening out vertically positioned pin sleeves is provided on one side of the feeding mechanism (1); a pin sleeve assembly mechanism (3) capable of assembling the positioning pins and the pin sleeves is provided on one side of the screening mechanism (2); The feeding mechanism (1) comprises a frame (102), a rotating drum (106) is rotatably arranged inside the frame (102), the screening mechanism (2) comprises a material return member (201) slidingly fitted with the rotating drum (106) and a plurality of hoppers (203) located inside the rotating drum (106), a main material distribution groove (4) is arranged between the screening mechanism (2) and the pin sleeve assembly mechanism (3), one end of each hopper (203) is provided with a secondary material distribution groove (204) merging in the direction of the main material distribution groove (4), and an adjusting groove (205) is arranged at the connection between the secondary material distribution groove (204) and the main material distribution groove (4); An auxiliary slot selection block (207) is rotatably provided in the adjustment groove (205) and is capable of allowing a pin sleeve of one of the plurality of auxiliary material distribution slots (204) to pass through. The auxiliary slot selection block (207) is provided with a rotating rod (209) rotatably connected to the fixing frame (206) and is provided with a pin sleeve slot (208) inside. A cross bar (210) is slidably passed through the top end of the rotating rod (209). A frame plate (202) is provided on the material return member (201). The frame plate (202) is provided with three clamping grooves (212) corresponding to the auxiliary material distribution slots (204) one by one. A clamping block (211) clamped with the clamping groove (212) is provided at the end of the cross bar (210).

2. The automatic material distribution mechanism of the positioning pin sleeve according to claim 1 is characterized in that: The pin sleeve assembly mechanism (3) comprises a processing table (301), on which a fan-shaped block (302) is reciprocatingly rotatable, the arc surface at the end of the fan-shaped block (302) is tightly fitted and slidably connected to the end of the main material distribution channel (4), the processing table (301) is provided with a limit rod (303) located inside the fan-shaped block (302), a limit shell (304) is provided at the side end of the fan-shaped block (302), a material removal plate (305) is hinged inside the limit shell (304), a spring sheet (306) is provided between the material removal plate (305) and the limit shell (304), and a material removal groove (307) is provided at the end of the material removal plate (305) for removing the pin sleeve from the main material distribution channel (4).

3. The automatic material distribution mechanism of the positioning pin sleeve according to claim 2 is characterized in that: The pin sleeve assembly mechanism (3) comprises a positioning pin conveying groove (308) located on a processing table (301), two end blocks (309) located directly above a material taking groove (307) are provided at the end of the positioning pin conveying groove (308), a material placing plate (310) capable of clamping the positioning pin is hingedly connected inside the end block (309), and a second spring sheet (311) is provided between the material placing plate (310) and the end block (309).

4. The automatic material distribution mechanism of the positioning pin sleeve according to claim 3 is characterized in that: The pin sleeve assembly mechanism (3) comprises a side plate (312) located on the processing table (301), a sliding rod (313) being provided on the side plate (312), a second spring (314) and a slider (315) being provided on the sliding rod (313), one end of the slider (315) being in contact with the second spring (314) and being located on the sliding rod (313) near the positioning pin conveying groove (308), an electric telescopic rod (316) being provided at the bottom of the slider (315), a motor (317) being provided at the bottom of the electric telescopic rod (316), a transmission rod (318) being provided at the output end of the motor (317), and an end head (319) being provided at the bottom of the transmission rod (318) and being capable of cooperating with the positioning pin and being located directly above the end block (309) and being provided at the bottom of the transmission rod (318).

5. The automatic material distribution mechanism of the positioning pin sleeve according to claim 1 is characterized in that: The feeding mechanism (1) comprises a base (101), the frame (102) is located on the base (101), a driving wheel (103) is provided inside the base, a driving device (104) is provided on the base (101) for driving the driving wheel (103) to rotate, driven wheels (105) are evenly arranged in the frame (102) on both sides of the driving wheel (103), the rotating drum (106) is connected to the driving wheel (103) and the driven wheel (105) in a rolling manner, and a plurality of lifting plates (107) are provided inside the rotating drum.

6. The automatic material distribution mechanism of the positioning pin sleeve according to claim 1 is characterized in that: The cross bar (210) is provided with a spring (213) located between the clamping block (211) and the rotating rod (209), the other end of the cross bar (210) is provided with a handle (214), and the bottom of the main material distribution channel (4) is provided with a fixing seat (216) fixedly connected to the material return member (201).

7. The automatic material distribution mechanism of the positioning pin sleeve according to claim 1 is characterized in that: A material distributor (215) is rotatably provided on the frame plate (202), and the distance between the bottom end of the material distributor (215) and the three auxiliary material distribution slots (204) allows a pin sleeve in a vertical position to pass through, but prevents a pin sleeve in a horizontal position from passing through.

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