An automatic PIN assembly device

Abstract

This utility model provides an automatic PIN assembly device, including a pressing mechanism and a PIN feeder and a gear feeder disposed on one side of the pressing mechanism. The pressing mechanism includes a rotatable turntable and a gear feeding assembly, a PIN feeding assembly, a pressing assembly, a discharging assembly, and a sorting assembly sequentially disposed on the outer end of the turntable. The gear feeding assembly, PIN feeding assembly, pressing assembly, and discharging assembly are sequentially installed at corresponding positions on the outer end of the turntable to achieve sequential feeding and pressing operations, enabling continuous PIN assembly. The PIN feeding assembly sequentially guides PINs out through a sorting module and presses them down into the corresponding gears through an ejector, thus completing the initial assembly of the PINs. A perforated pad is installed at the front end of the pressing head, allowing the PINs to pass through the holes for normal pressing initially. Once the pressing height is sufficient, the pad will directly contact the upper surface of the gear, at which point the PINs can no longer be pressed down. Precise machining ensures accurate pad thickness.

Description

Technical Field

[0001] This utility model relates to the technical field of PIN pin automatic assembly equipment, specifically to an automatic PIN pin assembly device. Background Technology

[0002] In the processing of small gears, PIN pins need to be assembled. Currently, PIN pressing machines on the market mainly use a robotic arm to pre-insert the PIN pins onto the gear, and then use hydraulic or servo electric cylinders to press the PIN pins to achieve the function. However, they cannot achieve precise control over the pressing depth of the PIN pins, which may lead to some products being unqualified and the processing efficiency is low. Therefore, an automatic PIN pin assembly device is needed. Utility Model Content

[0003] The technical problem solved by this utility model is to provide an assembly device that automatically feeds PIN needles and gears and automatically installs PIN needles on gears, so as to solve the problems mentioned in the background art.

[0004] The technical problem solved by this utility model is achieved by the following technical solution: an automatic PIN assembly device, including a pressing mechanism and a PIN feeder and a gear feeder arranged on one side of the pressing mechanism. The pressing mechanism includes a rotatable turntable and a gear feeding assembly, a PIN feeding assembly, a pressing assembly, a feeding assembly and a sorting assembly arranged sequentially on the outer end of the turntable.

[0005] The turntable is provided with several mold bases for placing gears. The gear feeder and gear loading assembly are configured to place the gears sequentially on the mold bases of the turntable. The PIN needle feeder and PIN needle loading assembly are configured to insert the PIN needles sequentially into the corresponding gears on the mold bases.

[0006] The pressing assembly includes a pressing frame and a pressing cylinder mounted on the pressing frame, and a pressing block slidably mounted on the pressing frame. The lower end of the pressing block is provided with a pressing head for pressing the PIN pin. A displacement sensor is provided on one side of the pressing frame to limit the pressing distance of the pressing block, so as to control the pressing depth of the PIN pin.

[0007] As a further embodiment of this utility model:

[0008] The gear feeder includes a circular vibratory feeder for sequentially feeding out gears and a linear vibratory feeder connected to the circular vibratory feeder to orderly feed out the gears. The outer end of the linear vibratory feeder is provided with a receiving platform, which is mounted on a receiving frame. The receiving platform is provided with a slide rail connected to the linear vibratory feeder. A stop block is provided on one side of the receiving platform to hold the gear. First photoelectric sensors are provided on both sides of the receiving platform to detect whether the gear is in position. The gear feeding assembly sequentially grabs the gears on the receiving platform and feeds them into the mold base.

[0009] As a further embodiment of this utility model:

[0010] The gear feeding assembly includes a mounting plate, a transverse plate slidably mounted on the mounting plate, and a lifting cylinder mounted on the transverse plate. The mounting plate is fixedly mounted on a vertical pole, and a guide rail is horizontally mounted on the mounting plate. The transverse plate is slidably mounted on the guide rail via a slider. A transverse cylinder is provided at the upper end of the mounting plate to push the transverse plate back and forth. The outer end of the output rod of the transverse cylinder is fixedly connected to the mounting plate via a connecting plate. The lifting cylinder is vertically mounted on the transverse plate, and a lifting plate is fixedly mounted at the outer end of the output rod of the lifting cylinder. A first gripper cylinder is mounted on one side of the lifting plate, and first clamping plates are respectively mounted on the two clamping arms at the lower end of the first gripper cylinder to close and grip the gear.

[0011] As a further embodiment of this utility model:

[0012] The PIN feeding machine includes a circular vibratory feeder and an air-blowing feeder that works in conjunction with the circular vibratory feeder. The air-blowing feeder is connected to an external flexible hose that guides the PIN feeding machine sequentially to the PIN loading assembly. Specifically, the circular vibratory feeder and the air-blowing feeder are conventional equipment, and using air to transport PINs is also a conventional technical means; therefore, this embodiment will not describe them in detail.

[0013] As a further embodiment of this utility model:

[0014] The PIN feeding assembly includes a support plate, a slide plate slidably mounted on the support plate, and a dispensing seat positioned at a corresponding position on the slide plate. The support plate has a vertically mounted slide rail. The slide plate is slidably mounted on the guide rail via a slider. A push cylinder is located at the upper end of the support plate to drive the slide plate up and down. The dispensing seat is fixedly mounted on the slide plate. A tube clamp is located at the upper end of the dispensing seat, and a flexible tube for guiding PIN pins is connected to the outside of the tube clamp to guide the PIN pins into the corresponding guide holes of the dispensing seat. A dispensing module is slidably mounted inside the dispensing seat. The outer end of the dispensing module is connected to a dispensing cylinder to control the movement of the dispensing module within the dispensing seat. The material distribution module is provided with a material distribution hole for accommodating PIN pins. A PIN pin insertion cylinder is provided on one side of the material distribution base. The material distribution module sequentially moves the PIN pins into the insertion cylinder and pushes the cylinder to control the cylinder to descend to the corresponding position of the gear so that the PIN pins can fall into the center hole of the gear. The upper end of the material distribution base is also provided with an ejector to guide the PIN pins out of the insertion cylinder. The ejector includes an ejector cylinder provided at the upper end of the material distribution base and an ejector pin provided in the corresponding hole of the material distribution base. The ejector cylinder controls the ejector pin to be inserted into the insertion cylinder so as to press the PIN pins down into the corresponding gear, thereby completing the initial assembly of the PIN pins.

[0015] As a further embodiment of this utility model:

[0016] The pressure block is slidably mounted on the slide rail corresponding to the pressing frame. A detection block is provided on one side of the pressure block corresponding to the displacement sensor. The detection block and the displacement sensor are set together to detect the pressing depth. The pressure block is equipped with a pressure sensor and is connected to the pressing head. A perforated pad is installed at the front end of the pressing head so that the PIN pin can pass through the hole for normal pressing in the early stage. After the pressing height is met, the pad will directly contact the upper surface of the gear, at which point the PIN pin can no longer be pressed down.

[0017] As a further embodiment of this utility model:

[0018] The unloading component has the same structure as the gear loading component, so as to pick up the assembled gear in the mold base and put it into the sorting component.

[0019] As a further embodiment of this utility model:

[0020] The sorting assembly includes a Y-shaped guide hopper and a sorting plate located at the bifurcation of the guide hopper. The sorting plate is rotatably mounted on the guide hopper via a sorting shaft. A sorting cylinder is provided at the lower end of the guide hopper to drive the sorting plate to rotate, thereby switching the feeding channel. A push rod is fixedly provided at the outer end of the output rod of the sorting cylinder. A connecting plate is provided on one side of the lower end of the sorting shaft. An oblong hole is opened in the connecting plate. The push rod is inserted into the oblong hole to push the connecting plate to rotate, thereby controlling the rotation adjustment of the sorting plate.

[0021] Compared with existing technologies, the advantages of this invention are as follows: The gear feeding assembly, PIN feeding assembly, pressing assembly, and unloading assembly in this device are sequentially installed at corresponding positions on the outer end of the turntable to achieve sequential feeding and pressing operations, enabling continuous assembly of PIN pins. The PIN feeding assembly sequentially guides the PIN pins out through the material distribution module and presses them down into the corresponding gears through the ejector, thus completing the initial assembly of the PIN pins. A perforated pad is installed at the front end of the pressing head, allowing the PIN pins to pass through the holes for normal pressing in the initial stage. After the pressing height is sufficient, the pad will directly contact the upper surface of the gear, at which point the PIN pins can no longer be pressed down. Precise machining ensures accurate pad thickness. Simultaneously, feedback data from pressure and displacement sensors are compared with normal values ​​to ensure that there are no quality problems with the gears and PINs themselves, thus verifying accuracy. This device achieves fully automatic pressing of PIN pins into the center of the gear, ensuring that the pressing depth error is controlled within ±0.125mm, while simultaneously detecting the pressing quality and separating unqualified pressed workpieces. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the pressing mechanism of this utility model. Figure 1;

[0024] Figure 3 This is a schematic diagram of the pressing mechanism of this utility model. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the gear feeding assembly structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the PIN pin feeding assembly of this utility model;

[0027] Figure 6 This is a schematic diagram of the press-fit assembly structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the sorting component structure of this utility model;

[0029] The diagram identifies the following components: 1. Gear feeding assembly; 2. PIN feeding assembly; 3. Pressing assembly; 4. Unloading assembly; 5. Sorting assembly; 6. PIN feeder; 7. Gear feeder; 8. Turntable; 11. Mounting plate; 12. Transverse plate; 13. Lifting cylinder; 14. Transverse cylinder; 15. Lifting plate; 16. First gripper cylinder; 17. First clamping plate; 20. Ejection cylinder; 21. Support plate; 22. Slide plate; 23. Distributor seat; 24. Pushing cylinder. 25. Cylinder; 26. Pipe clamp; 27. Hose; 28. Material distribution module; 29. ​​Material distribution cylinder; 30. Insert tube; 31. Pressing frame; 32. Pressing cylinder; 33. Pressing block; 34. Pressing head; 35. Displacement sensor; 36. Detection block; 51. Guide hopper; 52. Sorting plate; 53. Sorting shaft; 54. Sorting cylinder; 55. Push rod; 56. Connecting plate; 71. Receiving platform; 72. Receiving rack; 73. Stop block; 74. First photoelectric sensor; 81. Mold base. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides an automatic PIN assembly device, including a pressing mechanism and a PIN feeder 6 and a gear feeder 7 disposed on one side of the pressing mechanism. The pressing mechanism includes a rotatable turntable 8 and a gear feeding assembly 1, a PIN feeding assembly 2, a pressing assembly 3, a discharging assembly 4, and a sorting assembly 5 disposed sequentially on the outer end of the turntable 8.

[0032] The turntable 8 is provided with a plurality of mold bases 81 for placing gears. The gear feeder 7 is configured in conjunction with the gear feeding assembly 1 to place the gears sequentially on the mold bases 81 of the turntable 8. The PIN needle feeder 6 is configured in conjunction with the PIN needle feeding assembly 2 to insert the PIN needles sequentially into the corresponding gears on the mold bases 81.

[0033] The pressing assembly 3 includes a pressing frame 31 and a pressing cylinder 32 mounted on the pressing frame 31, and a pressing block 33 slidably mounted on the pressing frame 31. The lower end of the pressing block 33 is provided with a pressing head 34 for pressing down the PIN pin. A displacement sensor 35 is provided on one side of the pressing frame 31 to limit the pressing distance of the pressing block 33, so as to control the pressing depth of the PIN pin.

[0034] like Figure 1 and Figure 4 As shown, in this embodiment, the gear feeder 7 includes a circular vibratory feeder for sequentially feeding out gears and a linear vibratory feeder connected to the circular vibratory feeder to orderly feed out the gears. The outer end of the linear vibratory feeder is provided with a receiving platform 71, which is mounted on a receiving frame 72. The receiving platform 71 is provided with a slide rail connected to the linear vibratory feeder. A stop block 73 is provided on one side of the receiving platform 71 to abut against the gear. First photoelectric sensors 74 are provided on both sides of the receiving platform 71 to detect whether the gear is in position. The gear feeding assembly 1 sequentially grabs the gears on the receiving platform 71 and feeds them into the mold base 81.

[0035] The gear loading assembly 1 includes a mounting plate 11, a transverse plate 12 slidably mounted on the mounting plate 11, and a lifting cylinder 13 mounted on the transverse plate 12. The mounting plate 11 is fixedly mounted on a vertical pole, and a guide rail is horizontally mounted on the mounting plate 11. The transverse plate 12 is slidably mounted on the guide rail via a slider. A transverse cylinder 14 is provided at the upper end of the mounting plate 11 to push the transverse plate 12 back and forth. The outer end of the output rod of the transverse cylinder 14 is fixedly connected to the mounting plate 11 via a connecting plate. The lifting cylinder 13 is vertically mounted on the transverse plate 12, and a lifting plate 15 is fixedly mounted at the outer end of the output rod of the lifting cylinder 13. A first gripper cylinder 16 is mounted on one side of the lifting plate 15, and first clamping plates 17 are respectively mounted on the two clamping arms at the lower end of the first gripper cylinder 16 to close and grip the gear. Specifically, the gear loading assembly 1 is also equipped with several sensors to control the accuracy of the movement of each component. The transverse cylinder 14 controls the transverse plate 12 to move back and forth, and controls the first gripper cylinder 16 to move to the upper end of the receiving platform 71. The lifting cylinder 13 controls the first clamping plate 17 to descend to the corresponding position. The first gripper cylinder 16 controls the first clamping plate 17 to close to grab the gear. The lifting cylinder 13 controls the first clamping plate 17 to rise, and moves the grabbed gear to the corresponding mold base 81 on the turntable 8 through the transverse cylinder 14. The lifting cylinder 13 controls the first clamping plate 17 to descend, and the first gripper cylinder 16 controls the first clamping plate 17 to unfold, so that the gear falls into the corresponding mold base 81 and is positioned by the mold base 81.

[0036] like Figure 1 and Figure 5 As shown, in this embodiment, the PIN feeder 6 includes a circular vibratory feeder and an air-blowing feeder that works in conjunction with the circular vibratory feeder. The air-blowing feeder's external hose 26 guides the PIN feeder 6 sequentially onto the PIN feeding assembly 2. Specifically, the circular vibratory feeder and the air-blowing feeder are conventional equipment, and using air to transport PINs is also a conventional technical means; therefore, this embodiment will not describe them in detail.

[0037] The PIN feeding assembly 2 includes a support plate 21, a slide plate 22 slidably mounted on the support plate 21, and a feeding seat 23 positioned at a corresponding position on the slide plate 22. The support plate 21 has a vertically mounted slide rail. The slide plate 22 is slidably mounted on the guide rail via a slider. The upper end of the support plate 21 has a push cylinder 24 for driving the slide plate 22 to move up and down. The feeding seat 23 is fixedly mounted on the slide plate 22. The upper end of the feeding seat 23 has a tube clamp 25, with a flexible tube 26 for guiding the PIN needles externally to guide them into the corresponding guide holes of the feeding seat 23. A feeding module 27 is slidably mounted inside the feeding seat 23. The outer end of the feeding module 27 is connected to a feeding cylinder 28 to control the feeding module 27 in feeding... The material holder 23 moves within the material distribution module 27, which has a material distribution hole for accommodating PIN pins. A PIN pin insertion cylinder 29 is provided on one side of the material distribution module 23. The material distribution module 27 sequentially moves the PIN pins into the insertion cylinder 29, and pushes the cylinder 24 to control the insertion cylinder 29 to descend to the corresponding position of the gear, so that the PIN pins can fall into the center hole of the gear. The upper end of the material distribution module 23 is also provided with an ejector to guide the PIN pins out of the insertion cylinder 29. The ejector includes an ejector cylinder 20 located at the upper end of the material distribution module 23 and an ejector pin located in the corresponding hole of the material distribution module 23. The ejector cylinder 20 controls the ejector pin to insert into the insertion cylinder 29, pressing the PIN pin down into the corresponding gear, thereby completing the initial assembly of the PIN pins.

[0038] like Figure 2 and Figure 6 As shown, in this embodiment, the pressure block 33 is slidably mounted on the slide rail corresponding to the pressing frame 31. A detection block 36 is provided on one side of the pressure block 33 corresponding to the displacement sensor 35, so that the depth of pressure can be detected by the cooperation of the detection block 36 and the displacement sensor 35. A pressure sensor is provided on the pressure block 33 and connected to the pressing head 34. A perforated pad is installed at the front end of the pressing head 34, allowing the PIN pin to pass through the hole for normal pressing initially. Once the pressing height is met, the pad will directly contact the upper surface of the gear, at which point the PIN pin can no longer be pressed down. Precise machining ensures accurate pad thickness; simultaneously, the feedback data from the pressure sensor and displacement sensor 35 is compared with normal values ​​to ensure that the gear and PIN itself have no quality problems. This mutual verification ensures accuracy.

[0039] In this embodiment, the unloading component 4 has the same structure as the gear loading component 1, so as to pick up the assembled gear in the mold base 81 and put it into the sorting component 5.

[0040] like Figure 7As shown, in this embodiment, the sorting component 5 includes a Y-shaped guide hopper 51 and a sorting plate 52 disposed at the fork of the guide hopper 51. The sorting plate 52 is rotatably mounted on the guide hopper 51 via a sorting shaft 53. A sorting cylinder 54 is provided at the lower end of the guide hopper 51 to drive the sorting plate 52 to rotate, for switching the feeding channel. A push rod 55 is fixedly provided at the outer end of the output rod of the sorting cylinder 54. A connecting plate 56 is provided on one side of the lower end of the sorting shaft 53. An oblong hole is opened in the connecting plate 56. The push rod 55 is inserted into the oblong hole to push the connecting plate 56 to rotate, thereby controlling the rotation adjustment of the sorting plate 52.

[0041] The working principle of this device is as follows:

[0042] The turntable 8 is controlled to rotate by a servo motor. The gear feeding assembly 1, the PIN needle feeding assembly 2, the pressing assembly 3, and the unloading assembly 4 are installed in the corresponding positions on the outer end of the turntable 8 respectively.

[0043] The gear feeder 7 sequentially guides the gears and places them in the corresponding mold base 81 of the turntable 8 through the gear feeding assembly 1; the PIN needle feeder 6 sequentially guides the PIN needles and inserts them into the gears in the mold base 81.

[0044] The turntable 8 drives the mold base 81 to rotate. The pressing assembly 3 controls the pressing head 34 to descend through the pressing cylinder 32. At the same time, the pressing depth of the PIN pin is controlled by the feedback data of the pressure sensor and the displacement sensor 35, and the data is detected to ensure that there are no quality problems with the gear and the PIN itself. The data are mutually verified to ensure accuracy.

[0045] The feeding assembly 4 transfers the press-fitted gear into the guide hopper 51. If the above detection data is incorrect, the sorting cylinder 54 will control the sorting plate 52 to rotate in order to switch the feeding channel and separate out the defective products.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents. It should be noted that, in this document, the use of relational terms such as "first" and "second" is merely used to distinguish one entity or operation from another, and does not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the absence of further restrictions, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A PIN needle automatic assembly device, characterized by: It includes a pressing mechanism and a PIN needle feeder (6) and a gear feeder (7) disposed on one side of the pressing mechanism. The pressing mechanism includes a rotatable turntable (8) and a gear feeding assembly (1), a PIN needle feeding assembly (2), a pressing assembly (3), a discharging assembly (4), and a sorting assembly (5) disposed sequentially on the outer end of the turntable (8). The turntable (8) is provided with a number of mold bases (81) for placing gears. The gear feeder (7) and the gear feeding assembly (1) are configured to place the gears on the mold bases (81) of the turntable (8) in sequence. The PIN needle feeder (6) and the PIN needle feeding assembly (2) are configured to insert the PIN needles into the corresponding gears on the mold bases (81) in sequence. The pressing assembly (3) includes a pressing frame (31) and a pressing cylinder (32) mounted on the pressing frame (31) and a pressing block (33) slidably mounted on the pressing frame (31). The lower end of the pressing block (33) is provided with a pressing head (34) for pressing the PIN pin. A displacement sensor (35) is provided on one side of the pressing frame (31) to limit the pressing distance of the pressing block (33) in order to control the pressing depth of the PIN pin.

2. The automatic PIN-needle assembling device according to claim 1, characterized in that: The gear feeder (7) includes a circular vibrating feeder for sequentially feeding out gears and a linear vibrating feeder connected to the circular vibrating feeder to orderly feed out the gears. The outer end of the linear vibrating feeder is provided with a receiving platform (71). The receiving platform (71) is installed on the receiving frame (72). The receiving platform (71) is provided with a slide connected to the linear vibrating feeder. A stop block (73) is provided on one side of the receiving platform (71) to hold the gear. The two sides of the receiving platform (71) are provided with a first photoelectric sensor (74) to detect whether the gear is in position. The gear feeding assembly (1) sequentially grabs the gears on the receiving platform (71) and feeds them into the mold base (81).

3. The PIN pin automatic assembly device according to claim 2, characterized in that: The gear feeding assembly (1) includes a mounting plate (11), a transverse plate (12) slidably mounted on the mounting plate (11), and a lifting cylinder (13) mounted on the transverse plate (12). The mounting plate (11) is fixedly mounted on a vertical pole, and a guide rail is horizontally mounted on the mounting plate (11). The transverse plate (12) is slidably mounted on the guide rail via a slider. A transverse cylinder (14) is provided at the upper end of the mounting plate (11) to push the transverse plate (12) to move back and forth. The outer end of the output rod of the transverse cylinder (14) is fixedly connected to the mounting plate (11) through the connecting plate; the lifting cylinder (13) is vertically mounted on the transverse plate (12), and the outer end of the output rod of the lifting cylinder (13) is fixedly provided with a lifting plate (15). A first gripper cylinder (16) is installed on one side of the lifting plate (15), and a first clamping plate (17) is installed on the two clamping arms on both sides of the lower end of the first gripper cylinder (16) to close and grip the gear through the first clamping plate (17).

4. The PIN pin automatic assembly device according to claim 1, characterized in that: The PIN feeder (6) includes a circular vibratory feeder and an air-blowing feeder that works in conjunction with the circular vibratory feeder. The air-blowing feeder has an external hose (26) that guides the PIN feeder (6) sequentially onto the PIN feeding assembly (2).

5. The PIN pin automatic assembly device according to claim 4, characterized in that: The PIN feeding assembly (2) includes a support plate (21), a slide plate (22) slidably mounted on the support plate (21), and a feeding seat (23) set at a corresponding position on the slide plate (22). The support plate (21) is vertically provided with a slide rail. The slide plate (22) is slidably mounted on the guide rail by a slider. The upper end of the support plate (21) is provided with a push cylinder (24) for driving the slide plate (22) to move up and down. The feeding seat (23) is fixedly mounted on the slide plate (22). The upper end of the feeding seat (23) is provided with a tube clamp (25). The tube clamp (25) is connected to a flexible tube (26) for guiding PIN needles to guide the PIN needles into the corresponding guide hole of the feeding seat (23). A feeding module (27) is slidably mounted inside the feeding seat (23). The outer end of the feeding module (27) is connected to the feeding cylinder (28). Next, the material distribution module (27) is controlled to move within the material distribution seat (23). The material distribution module (27) is provided with a material distribution hole for accommodating PIN needles. The material distribution seat (23) is provided with a PIN needle insertion tube (29) on one side. The material distribution module (27) sequentially moves the PIN needles into the insertion tube (29) and pushes the cylinder (24) to control the insertion tube (29) to descend to the corresponding position of the gear so that the PIN needles can fall into the center hole of the gear. The upper end of the material distribution seat (23) is also provided with an ejector to guide the PIN needles out of the insertion tube (29). The ejector includes an ejector cylinder (20) provided at the upper end of the material distribution seat (23) and an ejector pin provided in the corresponding hole of the material distribution seat (23). The ejector cylinder (20) controls the ejector pin to be inserted into the insertion tube (29) so as to press the PIN needles down into the corresponding gear.

6. The PIN pin automatic assembly device according to claim 1, characterized in that: The pressure block (33) is slidably mounted on the slide rail corresponding to the pressing frame (31). A detection block (36) is provided on one side of the pressure block (33) corresponding to the displacement sensor (35). The detection block (36) and the displacement sensor (35) are configured to detect the depth of pressing. A pressure sensor is provided on the pressure block (33) and connected to the pressing head (34). A perforated pad is installed at the front end of the pressing head (34) so ​​that the PIN pin can pass through the hole and be pressed normally in the early stage. After the pressing height is met, the pad will directly contact the upper surface of the gear. At this time, the PIN pin will no longer be pressed down.

7. The PIN pin automatic assembly device according to claim 3, characterized in that: The unloading component (4) has the same structure as the gear loading component (1) to pick up the assembled gear in the mold base (81) and put it into the sorting component (5).

8. The PIN pin automatic assembly device according to claim 7, characterized in that: The sorting assembly (5) includes a Y-shaped guide hopper (51) and a sorting plate (52) set at the bifurcation of the guide hopper (51). The sorting plate (52) is rotatably mounted on the guide hopper (51) via a sorting shaft (53). The lower end of the guide hopper (51) is provided with a sorting cylinder (54) for driving the sorting plate (52) to rotate, so as to switch the feeding channel. The outer end of the output rod of the sorting cylinder (54) is fixedly provided with a push rod (55). A connecting plate (56) is provided on one side of the lower end of the sorting shaft (53). A waist-shaped hole is opened in the connecting plate (56). The push rod (55) is inserted into the waist-shaped hole to push the connecting plate (56) to rotate, thereby controlling the rotation adjustment of the sorting plate (52).

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