An automatic assembly device for a hinge

Abstract

The present invention discloses an automatic assembly device for a hinge. On the top surface of the carrier, there is an inner strip assembly positioning surface for placing the inner strip assembly and an arm body positioning surface for placing the arm body. A first groove extending downward is provided between the inner strip assembly positioning surface and the arm body positioning surface on the top surface of the carrier. The first groove is used for placing a plastic round tube. A support block is inserted into the bottom of the first groove in a liftable and slidable manner. The top surface of the support block has a round tube positioning surface matching the shape of the side wall of the plastic round tube for placing the plastic round tube. A conveying device is used to convey the carrier to move. A plurality of riveting machines are distributed on either side of the conveying device for inserting connecting nails into the connecting holes of the workpieces on the carrier. The plurality of riveting machines includes a first riveting machine. When the conveying device conveys the carrier to pass through the plurality of riveting machines in sequence, it first passes through the first riveting machine. The first riveting machine is used to insert connecting nails into the connecting holes of the inner strip assembly, the plastic round tube, and the arm body. The present invention realizes stable and efficient assembly between the hinge components.

Description

Technical Field

[0001] The present invention relates to the field of hinge assembly equipment, and in particular to an automatic hinge assembly device. Background Art

[0002] Hinges are usually made up of multiple parts such as arms, bases, cup heads, and four-hole parts that are connected by rivets or screws. There are also tiny parts such as torsion springs, plastic round tubes, and U nails at the joints of each component. For hinges with buffering functions, it is necessary to further install an inner bar assembly containing a buffer damping tube. When the hinge is assembled as a whole, the connection holes of each component need to be aligned for assembly. However, the hinge components are small and irregular, and usually need to be manually adjusted and positioned, resulting in low production efficiency, long production cycle, low positioning accuracy, and difficulty in ensuring the yield rate. For example, the positioning carrier with application number 202010675404.6 first fits the entire outer wall of the arm body for positioning, so that the opening of the arm body faces upward, so that the inner strip assembly is placed into the arm body through the opening of the arm body for installation, and an opening is pre-set on the arm body, and a support rod is set on the carrier to pass through the opening and enter the interior of the arm body to support and position the inner strip assembly placed in the arm body. This positioning carrier requires special holes to be opened on the arm body product, which increases the arm body process and affects the strength of the arm body. After the inner strip assembly is placed in the arm body, it is only positioned and supported by a small support rod, which is very unstable. It is easy to skew during nailing, resulting in assembly failure or damage to the workpiece. The arm body is trapped in the carrier, and the nailing machine cannot fully approach for nailing, which affects the nailing stability, and the arm body may be slightly deformed after nailing. The arm body trapped in the carrier may be difficult to take out. Other parts, such as plastic round tubes, are too small to be grasped manually. When placed on ordinary carriers for assembly, they are too light and easily roll off with slight vibrations. Other parts also have problems such as irregular shapes, small sizes, and light weight, making them difficult to load automatically. Currently, manual positioning and loading are mostly adopted, and machine nailing is used. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide an automatic assembly device for hinges to achieve stable and efficient assembly between hinge components.

[0004] To achieve the above object, the present invention discloses an automatic assembly device for a hinge, comprising:

[0005] A vehicle, on the top surface of which there is an inner strip component positioning surface matching the bottom surface shape of the inner strip component for placing the inner strip component, on the top surface of the vehicle around the inner strip component positioning surface there is an arm body positioning surface matching the bottom surface shape of the arm body for placing the arm body, between the inner strip component positioning surface and the arm body positioning surface on the top surface of the vehicle there is a first groove extending downward for placing a plastic round tube, at the bottom of the first groove there is a support block inserted in a liftable and slidable manner, and on the top surface of the support block there is a round tube positioning surface matching the side wall shape of the plastic round tube for placing the plastic round tube;

[0006] A conveying device for conveying the vehicle to move;

[0007] A number of nail-piercing machines distributed on either side of the conveying device for inserting connecting nails into the connecting holes of the workpieces on the vehicle. The number of nail-piercing machines includes a first nail-piercing machine. When the conveying device conveys the vehicle to pass through the number of nail-piercing machines in sequence, it first passes through the first nail-piercing machine, and the first nail-piercing machine is used for inserting connecting nails into the connecting holes of the inner strip component, the plastic round tube and the arm body.

[0008] A round tube driving device arranged at the first nail-piercing machine for driving the support block to rise to lift the plastic round tube to leave the first groove and be located between the inner strip component and the arm body, and the connecting holes on the inner strip component, the plastic round tube and the arm body are aligned with each other.

[0009] Preferably, on the side wall of the first groove facing the outside of the vehicle there is a first notch extending from the top surface of the vehicle into the first groove, and the width of the first notch is smaller than the diameter of the plastic round tube.

[0010] Preferably, the vehicle includes a base and a slider slidably arranged on the base. The inner strip component positioning surface, the arm body positioning surface and the first groove are respectively arranged on the base. There is a slot on the slider for accommodating a four-hole part. When the four-hole part is inserted into the slot, the upper ends of the two side walls of the four-hole part are located outside the slot, and the slider is slidably arranged close to or away from the arm body positioning surface;

[0011] The number of nail-piercing machines includes a second nail-piercing machine for inserting connecting nails into the connecting holes of the four-hole part, the torsion spring and the arm body;

[0012] At the second nail-piercing machine there is a slider driving device for driving the slider to slide close to the arm body positioning surface to align the connecting holes of the four-hole part and the arm body with each other.

[0013] Preferably, a torsion spring positioning surface is provided between the two side walls of the four-hole part on the top surface of the slider. The torsion spring positioning surface matches the shape of the side wall of the torsion spring for accommodating the torsion spring. When the torsion spring is placed on the torsion spring positioning surface, the connection holes of the torsion spring are aligned with the two connection holes at the upper ends of the two side walls of the four-hole part.

[0014] Preferably, it further includes an inner strip component feeding mechanism, a plastic round tube feeding mechanism, and an arm body feeding mechanism. The conveying device conveys the carrier to pass through the inner strip component feeding mechanism, the plastic round tube feeding mechanism, and the arm body feeding mechanism first and then pass through the first riveting machine. The inner strip component feeding mechanism clamps the inner strip component onto the inner strip component positioning surface. The plastic round tube feeding mechanism clamps the plastic round tube onto the round tube positioning surface. The arm body feeding mechanism clamps the arm body onto the arm body positioning surface.

[0015] Preferably, the inner strip component feeding mechanism includes:

[0016] A feeding chute, the feeding chute includes a plurality of bottom supporting strips and top pressing strips. The inner strip components are arranged in a sliding manner between the bottom supporting strips and the top pressing strips. The bottom supporting strips respectively match at least two depressions on the bottom surface of the inner strip components to limit and align the inner strip components. The end of the bottom supporting strip located below the laminations of the inner strip component is more inclined downward than other bottom supporting strips, so that when the inner strip component slides to the end in the feeding chute, the laminations of the inner strip component rotate downward;

[0017] Inner strip component clamping claws, the inner strip component clamping claws clamp the inner strip component located at the end of the feeding chute onto the inner strip component positioning surface.

[0018] Preferably, the round tube feeding mechanism includes:

[0019] The first and second round tube chutes, the plastic round tubes are respectively arranged in a sliding manner in the first and second round tube chutes. The ends of the first and second round tube chutes are at the same height and are close to each other. One side of the first and second round tube chutes respectively has a chute notch, and the core holes of the plastic round tubes face the chute notch;

[0020] Round tube clamping claws, the round tube clamping claws include first left and right round tube clamping fingers that move closer or farther away from each other. Opposite first and second round tube insertion pins are respectively arranged on the first left and right round tube clamping fingers and are respectively used to pass through the chute notch and insert into the core holes of the plastic round tubes located at the ends of the first and second round tube chutes. The round tube clamping claws clamp the plastic round tubes onto the round tube positioning surface.

[0021] Preferably, it further includes a four-hole part feeding mechanism and an arm body feeding mechanism. The conveying device conveys the carrier to pass through the four-hole part feeding mechanism and the arm body feeding mechanism first and then pass through the second riveting machine. The four-hole part feeding mechanism includes:

[0022] A torsion spring slideway, in which the torsion springs are arranged in a sliding manner;

[0023] A four-hole part slideway, in which the four-hole parts are arranged in a sliding manner and the concave position formed between the two side walls of the four-hole part faces the torsion spring slideway;

[0024] An assembly chute, which is arranged between the end of the four-hole part slideway and the end of the torsion spring slideway for the torsion spring to slide through;

[0025] A push block, which is telescopically arranged on one side of the end of the torsion spring slideway. When the push block is pushed out, it pushes the torsion spring at the end of the torsion spring slideway to slide through the assembly chute and enter the four-hole part at the end of the four-hole part slideway. At this time, the connection holes of the torsion spring and the four-hole part are aligned with each other;

[0026] A four-hole part loading gripper, which includes first left and right four-hole part gripper fingers that move closer to or away from each other. Opposite first and second four-hole part pins are respectively arranged on the first left and right four-hole part gripper fingers for inserting into both ends of the connection hole between the torsion spring and the four-hole part. The four-hole part gripper synchronously clamps the four-hole part and the torsion spring onto the carrier.

[0027] Preferably, there is a downwardly extending torsion spring positioning notch between the torsion spring positioning surface and the arm body positioning surface on the top surface of the carrier. When the torsion spring is placed on the torsion spring positioning surface, both ends of the torsion spring face the arm body positioning surface and are located above the torsion spring positioning notch. The arm body loading mechanism includes:

[0028] A torsion spring guiding device, which includes a guide pin and a guide pin driving mechanism for driving the guide pin to extend and lift. The guide pin is arranged on one side of the carrier and the telescopic direction faces the torsion spring positioning notch. When the guide pin driving mechanism drives the guide pin to extend, the guide pin is inserted into the bottom of the torsion spring positioning notch. When the guide pin driving mechanism drives the guide pin to rise, the guide pin rises along the torsion spring positioning notch to hook the end of the torsion spring upwards;

[0029] An arm body gripper, which includes an arm body gripper finger for clamping the arm body, a pressing block arranged on one side of the arm body gripper finger, and an arm body gripper driving mechanism for driving the arm body gripper finger and the pressing block to move synchronously. When the arm body gripper driving mechanism drives the arm body gripper finger to clamp the arm body and descend above the arm body positioning surface, the pressing block first contacts the right end of the torsion spring to make the right end of the torsion spring swing downwards and remain below the arm body.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] Positioning surfaces are provided for each component for placement and positioning. After positioning, the connection holes on each component are automatically aligned, and connection and assembly can be achieved simply by inserting pins, resulting in higher efficiency;

[0032] By providing the slot and the positioning surface of the arm body on the slider and the base respectively, the four-hole component and the arm body will not affect each other when placed in the carrier, and after the slider moves, the four-hole component and the arm body can be inserted together to align their connection holes;

[0033] By providing a first groove for the plastic round tube to be placed in, and by providing a support block with a round tube positioning surface, the plastic round tube can be lifted to a specified height in a specified posture for installation during installation, making the plastic round tube less likely to roll and fall before installation and more stable;

[0034] Since the round tube is small and thin, when loading, in some cases, a pin is inserted into the core hole of the round tube to achieve the handling of the round tube. However, when the round tube falls off the pin, it is easy to jump away, making it difficult to determine the landing point. By providing a first notch for the pin to pass through, when the pin is inserted with the round tube and descends into the first groove, the pin can descend along the first notch together with the round tube. Subsequently, the pin is pulled out from the core hole of the round tube and passes through the first notch to leave the carrier. Since the width of the first notch is smaller than the diameter of the plastic round tube, the round tube cannot leave with the pin and is left in the first groove, making the process of placing the round tube in the carrier more stable;

[0035] By providing a loading chute to guide the angle of the inner strip assembly, it is convenient for picking and placing;

[0036] By aligning the torsion spring with the four-hole component first and then clamping them together onto the carrier, the efficiency of positioning and aligning during loading is higher;

[0037] Since the plastic round tube is small and light, the gravity effect on the chute is not obvious and the movement is slow. By providing a support block to drag the plastic round tube to the chute notch, it is ensured that the round tube can reach the mutual notch, and by providing a detection device to timely detect the situation where the plastic round tube cannot fall;

[0038] By providing a torsion spring positioning surface, the end of the torsion spring faces the arm body and is located above the notch. Thus, a guide is provided to extend into the notch and lift and lower the end of the torsion spring to be uniformly corrected upward, so that when the arm body presses down, one end of the torsion spring can be pressed under the arm body. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of the overall structure of the existing hinge;

[0040] Figure 2 It is an exploded view of the overall structure of the existing hinge;

[0041] Figure 3 It is a schematic diagram of the overall structure of this embodiment;

[0042] Figure 4 Schematic diagram of the overall structure of the vehicle in this embodiment;

[0043] Figure 5 Schematic diagram of the cooperation between the support block and the base in this embodiment;

[0044] Figure 6 Schematic diagram of the cooperation between the inner bar assembly and the vehicle in this embodiment;

[0045] Figure 7 Schematic diagram of the cooperation between the arm body and the vehicle in this embodiment;

[0046] Figure 8 Schematic diagram of the cooperation between the four-hole part, the torsion spring and the slider in this embodiment;

[0047] Figure 9 Schematic diagram of the overall structure of the feeding mechanism of the inner bar assembly in this embodiment;

[0048] Figure 10 is Figure 9 Enlarged view of part A in

[0049] Figure 11 Schematic diagram of the overall structure of the feeding mechanism of the four-hole part in this embodiment;

[0050] Figure 12 Schematic diagram of the cooperation between the assembly chute and the push block in this embodiment;

[0051] Figure 13 Schematic diagram of the overall structure of the feeding jaw of the four-hole part;

[0052] Figure 14 Schematic diagram of the overall structure of the feeding mechanism of the round tube in this embodiment;

[0053] Figure 15 Schematic diagram of the overall structure of the round tube jaw in this embodiment;

[0054] Figure 16 Side view of the overall structure of the arm body feeding mechanism before the torsion spring angle correction in this embodiment;

[0055] Figure 17 Side view of the overall structure of the arm body feeding mechanism after the torsion spring angle correction in this embodiment. Detailed implementation manners

[0056] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the Figures 1-17 accompanying drawings.

[0057] Refer to Figures 1-2As shown in the figure, the existing hinge 1 includes components such as an arm body 11, a four-hole part 12, an inner strip assembly 13, a torsion spring 14, a plastic round tube 15, etc. Among them, the inner strip assembly 13 is composed of a laminated sheet 131, a triangular part 132, and a damping tube 133 connected in sequence. Each component has a connection hole 16, and the connection holes 16 of each component are aligned with each other and inserted with connection pins to complete the assembly of the hinge.

[0058] Referring to Figure 3 As shown in the figure, this embodiment discloses an automatic assembly device for a hinge, including a carrier 2 and a conveying device 3. The conveying device 3 is a conventional conveying device such as a conveyor belt to convey and move the carrier 2, successively passing through an inner strip assembly feeding mechanism 4, a four-hole part feeding mechanism 5, a round tube feeding mechanism 6, an arm body feeding mechanism 7, a first pin inserting machine 8, and a second pin inserting machine 9.

[0059] Referring to Figures 4-8 As shown in the figure, the carrier 2 includes a base 21, a slider 22, and a support block 23. On the top surface of the base 21, there is an inner strip assembly positioning surface 213 that matches the bottom shape of the inner strip assembly 13 for placing the inner strip assembly 13. On the periphery of the inner strip assembly positioning surface 213 on the top surface of the base 21, there is an arm body positioning surface 211 that matches the bottom shape of the arm body 11 for placing the arm body 11. Between the inner strip assembly positioning surface 213 and the arm body positioning surface 211 on the top surface of the base 21, there is a first groove 214 extending downward for placing the plastic round tube 15. The support block 23 is slidably inserted at the bottom of the first groove 214, and the top surface of the support block 23 has a round tube positioning surface 231 that matches the side wall shape of the plastic round tube 15 for placing the plastic round tube 15.

[0060] On the side wall of the first groove 214 facing the outside of the base 21, there is a first notch 215 extending from the top surface of the base 21 into the first groove 214, and the width of the first notch 215 is smaller than the diameter of the plastic round tube 15. On the other side of the inner strip assembly positioning surface 213 on the base 21, there is a second groove and a support block 23 that are symmetrically structured with the first groove 214.

[0061] The slider 22 has a slot 221 for accommodating the four-hole part 12. When the four-hole part 12 is inserted into the slot 221, the upper ends of the two side walls 121 and 122 of the four-hole part 12 are located outside the slot 221, and the slider 22 is slidably inserted into the chute 212 on the base 21.

[0062] On the top surface of the slider 22, between the two side walls 121 and 122 of the four-hole part 12, there is a torsion spring positioning surface 222 that matches the side wall shape of the torsion spring 14 for accommodating the torsion spring 14. When the torsion spring 14 is placed on the torsion spring positioning surface 222, the connection hole 16 of the torsion spring 14 is aligned with the two connection holes 16 at the upper ends of the two side walls 121 and 122 of the four-hole part 12.

[0063] Referring toFigures 9-10 As shown in the figure, the inner strip component loading mechanism 4 includes a loading chute and an inner strip component gripper 41. The loading chute 42 includes a plurality of bottom supporting strips 421 and a top pressing strip 422. The inner strip components 13 are slidably arranged between the bottom supporting strips 421 and the top pressing strip 422. The bottom supporting strips 421 respectively match at least two recesses on the bottom surface of the inner strip components 13 to limit and align the inner strip components 13. The end of the bottom supporting strip 421 located under the laminations 131 of the inner strip component 13 is more inclined downward than other bottom supporting strips 421, so that when the inner strip component 421 slides to the end in the loading chute, the laminations 131 of the inner strip component 13 rotate downward. The inner strip component gripper 41 clamps the inner strip component 13 located at the end of the loading chute 42 and places it on the inner strip component positioning surface 213.

[0064] Refer to Figures 11-13 As shown in the figure, the four-hole part loading mechanism 5 includes a torsion spring chute 52, a four-hole part chute 51, an assembly chute 54, a push block 55 and a four-hole part loading gripper 53. The torsion spring 14 is slidably arranged in the torsion spring chute 52; the four-hole part 12 is slidably arranged in the four-hole part chute 51 and the recess formed between the two side walls 121, 122 on the four-hole part 12 faces the torsion spring chute 52; the assembly chute 54 is arranged between the end of the four-hole part chute 51 and the end of the torsion spring chute 52 for the torsion spring 14 to slide through.

[0065] The push block 55 is telescopically arranged on one side of the end of the torsion spring chute 52. When the push block 55 retracts, it is connected and communicated with the end of the torsion spring chute 52. The top surface of the push block 55 has a torsion spring positioning surface 551 matching the shape of the side wall of the torsion spring 14 for receiving the torsion spring 14 sliding down from the torsion spring chute 52. When the push block 55 is pushed out, it supports the torsion spring 14 to slide through the assembly chute 54 and enter the four-hole part 12 at the end of the four-hole part chute 51, and at this time the torsion spring 14 is aligned with the connecting hole 16 of the four-hole part 12.

[0066] The four-hole part loading gripper 53 includes first left and right four-hole part fingers 531, 532 that move closer or farther apart. Opposite first and second four-hole part pins 533, 534 are respectively arranged on the first left and right four-hole part fingers 531, 532 for inserting into both ends of the connecting hole of the torsion spring 14 and the four-hole part 12, so as to clamp the four-hole part 12 and the torsion spring 14 onto the carrier for the four-hole part 12 and the torsion spring 14 onto the carrier 2 synchronously.

[0067] Refer to Figures 14-15 As shown in the figure, the round tube loading mechanism 6 includes first and second round tube chutes 61, 62 and a round tube gripper 63. The plastic round tubes 15 are respectively slidably arranged in the first and second round tube chutes 61, 62. The ends of the first and second round tube chutes 61, 62 are aligned in height and are close to each other. First and second chute notches 611, 621 are respectively provided on one side of the first and second round tube chutes 61, 62. The core holes of the plastic round tubes 15 face the first and second chute notches 611, 621.

[0068] The circular tube gripper 63 includes first left and right circular tube gripper fingers 631 and 632 that are movably arranged closer or farther apart. Opposite first and second circular tube pins 633 and 634 are respectively arranged on the first left and right circular tube gripper fingers 631 and 632, and are respectively used to pass through the first and second slideway notches 611 and 621 and insert into the core holes of the plastic circular tubes 15 at the ends of the first and second circular tube slideways 61 and 62, so as to clamp the plastic circular tubes 15 onto the carrier 2. When the first circular tube pin 633 is inserted into the core hole of the plastic circular tube 15 and the plastic circular tube 15 descends with the first circular tube pin 633 into the first groove 214, the first circular tube pin 633 descends along the first notch 215. Subsequently, the first circular tube pin 633 moves axially along the core hole of the plastic circular tube 15 in a direction away from the first groove 214, and the first circular tube pin 633 passes through the first notch 215 and leaves the carrier 2. Since the width of the first notch 215 is smaller than the diameter of the plastic circular tube 15, the plastic circular tube 15 is left in the first groove 214; the structure of the second groove is symmetrical to the first groove 214 and is used to cooperate with the second circular tube pin 634.

[0069] Refer to Figures 16-17 As shown in the figure, the arm body feeding mechanism 7 includes a torsion spring guiding device and an arm body gripper 72. There is a downwardly extending torsion spring positioning notch 24 between the torsion spring positioning surface 213 and the arm body positioning surface 211 on the top surface of the base 21. When the torsion spring 14 is placed on the torsion spring positioning surface 222, both ends of the torsion spring 14 face the arm body positioning surface 211 and are located above the torsion spring positioning notch 24; the torsion spring guiding device includes a guide pin 71 and a guide pin driving mechanism for driving the guide pin to extend and retract and lift and lower. The guide pin 71 is arranged on one side of the carrier 2 and the telescopic direction faces the torsion spring positioning notch 24. When the guide pin driving mechanism drives the guide pin 71 to extend, the guide pin 71 is inserted into the bottom of the torsion spring positioning notch 24. When the guide pin driving mechanism drives the guide pin 71 to rise, the guide pin 71 rises along the notch to hook the end portions 141 and 142 of the torsion spring 14 upwards.

[0070] The arm body gripper 72 includes arm body gripper fingers 721 for clamping the arm body 11, a pressing block 722 arranged on one side of the arm body gripper fingers 721, and an arm body gripper driving mechanism for driving the arm body gripper fingers 721 and the pressing block 722 to move synchronously. When the arm body gripper driving mechanism drives the arm body gripper fingers 721 to clamp the arm body 11 and descend above the arm body positioning surface 211, the pressing block 722 first contacts the right end portion 141 of the torsion spring 14 to make the right end portion 141 of the torsion spring 14 swing and descend to remain below the arm body 11.

[0071] The first nail inserting machine 8 is used to insert connecting nails into the connecting holes 16 on the inner strip assembly 13, the plastic round tube 15 and the arm body 11. A round tube driving device is arranged at the first nail inserting machine 8 to drive the supporting block 23 to rise, so as to lift the plastic round tube 15 to leave the first groove 214 and be located between the inner strip assembly 13 and the arm body 11, and the connecting holes 16 on the inner strip assembly 13, the plastic round tube 15 and the arm body 11 are aligned with each other.

[0072] The second nail inserting machine 9 inserts connecting nails into the connecting holes 16 on the four-hole part 12, the torsion spring 14 and the arm body 11; a slider driving device is arranged at the second nail inserting machine 9, and the slider driving device is used to drive the slider 22 to slide close to the arm body positioning surface 211, so that the upper ends of the two side walls 121, 122 of the four-hole part 12 are inserted into the arm body 11 and the connecting holes 16 are aligned with each other.

[0073] Certainly, the above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic assembly device for a hinge, characterized in that: Comprising: A vehicle, on the top surface of which there is an inner strip component positioning surface matching the bottom surface shape of the inner strip component for placing the inner strip component, on the periphery of the inner strip component positioning surface on the top surface of the vehicle there is an arm body positioning surface matching the bottom surface shape of the arm body for placing the arm body, between the inner strip component positioning surface and the arm body positioning surface on the top surface of the vehicle there is a first groove extending downward, the first groove is used for placing a plastic round tube, a support block is inserted into the bottom of the first groove in a liftable and slidable manner, and the top surface of the support block has a round tube positioning surface matching the side wall shape of the plastic round tube for placing the plastic round tube; A conveying device for conveying the vehicle to move; A plurality of nail inserting machines distributed on either side of the conveying device for inserting connecting nails into the connecting holes of the workpieces on the vehicle, the plurality of nail inserting machines includes a first nail inserting machine, when the conveying device conveys the vehicle to pass through the plurality of nail inserting machines in sequence, it first passes through the first nail inserting machine, and the first nail inserting machine is used for inserting connecting nails into the connecting holes of the inner strip component, the plastic round tube and the arm body; A round tube driving device arranged at the first nail inserting machine, the round tube driving device is used for driving the support block to rise to lift the plastic round tube out of the first groove and place it between the inner strip component and the arm body, and the connecting holes of the inner strip component, the plastic round tube and the arm body are aligned with each other for inserting connecting nails; The vehicle includes a base and a slider slidably arranged on the base, the slider has a slot for accommodating a four-hole part, when the four-hole part is inserted into the slot, the upper ends of the two side walls of the four-hole part are located outside the slot, and the slider is slidably arranged close to or away from the arm body positioning surface so that the connecting holes at the upper ends of the two side walls of the four-hole part and the connecting holes on the arm body are aligned with each other; On the side wall of the first groove facing the outside of the vehicle, there is a first notch extending from the top surface of the vehicle into the first groove, and the width of the first notch is smaller than the diameter of the plastic round tube.

2. The automatic assembling device for a hinge according to claim 1, wherein: The inner strip component positioning surface, the arm body positioning surface and the first groove are respectively arranged on the base; The plurality of nail inserting machines includes a second nail inserting machine, and the second nail inserting machine inserts connecting nails into the connecting holes of the four-hole part and the arm body; A slider driving device is arranged at the second nail inserting machine, and the slider driving device is used for driving the slider to slide close to the arm body positioning surface so that the connecting holes at the upper ends of the two side walls of the four-hole part and the connecting holes on the arm body are aligned with each other.

3. The automatic assembling device of the hinge according to claim 2, characterized in that: On the top surface of the slider, between the upper ends of the two side walls of the four-hole part, there is a torsion spring positioning surface matching the side wall shape of the torsion spring for accommodating the torsion spring, when the torsion spring is placed on the torsion spring positioning surface, the connecting holes of the torsion spring are aligned with the two connecting holes at the upper ends of the two side walls of the four-hole part for inserting connecting nails.

4. The automatic assembly device of the hinge according to claim 1, characterized in that: It also includes an inner strip component feeding mechanism, a plastic round tube feeding mechanism and an arm body feeding mechanism. The conveying device conveys the carrier to pass through the inner strip component feeding mechanism, the plastic round tube feeding mechanism and the arm body feeding mechanism first and then pass through the first riveting machine. The inner strip component feeding mechanism clamps and places the inner strip component on the inner strip component positioning surface. The plastic round tube feeding mechanism clamps and places the plastic round tube on the round tube positioning surface. The arm body feeding mechanism clamps and places the arm body on the arm body positioning surface.

5. The automatic assembly device of the hinge according to claim 4, characterized in that: The inner strip component feeding mechanism includes: A feeding chute, the feeding chute includes a plurality of bottom supporting bars and top pressing bars. The inner strip components are arranged in a sliding manner between the bottom supporting bars and the top pressing bars. The bottom supporting bars respectively match at least two recesses on the bottom surface of the inner strip component to limit and align the inner strip component. The end of the bottom supporting bar located under the laminations of the inner strip component is more inclined downward than other bottom supporting bars, so that when the inner strip component slides to the end in the feeding chute, the laminations of the inner strip component rotate to face downward; Inner strip component clamping claws, the inner strip component clamping claws clamp and place the inner strip component located at the end of the feeding chute on the inner strip component positioning surface.

6. The automatic assembly device of the hinge according to claim 4, characterized in that: The round tube feeding mechanism includes: The first and second round tube chutes, the plastic round tubes are respectively arranged in a sliding manner in the first and second round tube chutes. The ends of the first and second round tube chutes are at the same height and are close to each other. One side of the first and second round tube chutes respectively has a chute notch, and the core holes of the plastic round tubes face the chute notch; Round tube clamping claws, the round tube clamping claws include first left and right round tube clamping fingers that move closer or farther apart. The first and second round tube insertion pins are respectively arranged on the first left and right round tube clamping fingers and are used to pass through the chute notch and insert into the core holes of the plastic round tubes located at the ends of the first and second round tube chutes. The round tube clamping claws clamp and place the plastic round tubes on the round tube positioning surface.

7. The automatic assembly device of the hinge according to claim 2, characterized in that: It also includes a four-hole part feeding mechanism and an arm body feeding mechanism. The conveying device conveys the carrier to pass through the four-hole part feeding mechanism and the arm body feeding mechanism first and then pass through the second riveting machine. The four-hole part feeding mechanism includes: A torsion spring chute, the torsion spring is arranged in a sliding manner in the torsion spring chute; A four-hole part chute, the four-hole part is arranged in a sliding manner in the four-hole part chute and the concave position formed between the two side walls of the four-hole part faces the torsion spring chute; An assembly chute, the assembly chute is arranged between the end of the four-hole part chute and the end of the torsion spring chute for the torsion spring to slide through; A push block, the push block is telescopically arranged on one side of the end of the torsion spring chute. When the push block is pushed out, it pushes the torsion spring at the end of the torsion spring chute to slide through the assembly chute and enter the four-hole part at the end of the four-hole part chute, and at this time the connection holes of the torsion spring and the four-hole part are aligned with each other; Four-hole part feeding clamping claws, the four-hole part feeding clamping claws include first left and right four-hole part clamping fingers that move closer or farther apart. The first and second four-hole part insertion pins are respectively arranged on the first left and right four-hole part clamping fingers and are used to insert into both ends of the connection hole of the torsion spring and the four-hole part. The four-hole part clamping claws clamp and place the four-hole part and the torsion spring on the carrier synchronously.

8. The automatic assembly device of the hinge according to claim 7, characterized in that: A torsion spring positioning notch extending downward is provided on the top surface of the vehicle between the torsion spring positioning surface and the arm body positioning surface. When the torsion spring is placed on the torsion spring positioning surface, both ends of the torsion spring face the arm body positioning surface and are located above the torsion spring positioning notch. The arm body loading mechanism includes: A torsion spring guiding device, which includes a guide pin and a guide pin driving mechanism for driving the telescopic and lifting movement of the guide pin. The guide pin is arranged on one side of the vehicle and the telescopic direction thereof faces the torsion spring positioning notch. When the guide pin driving mechanism drives the guide pin to extend, the guide pin is inserted into the bottom of the torsion spring positioning notch. When the guide pin driving mechanism drives the guide pin to rise, the guide pin rises along the torsion spring positioning notch to hook the end of the torsion spring upward; An arm body clamp, which includes an arm body clamp finger for clamping the arm body, a pressing block arranged on one side of the arm body clamp finger, and an arm body clamp driving mechanism for driving the synchronous movement of the arm body clamp finger and the pressing block. When the arm body clamp driving mechanism drives the arm body clamp finger to clamp the arm body and descend above the arm body positioning surface, the pressing block first contacts the right end of the torsion spring to make the right end of the torsion spring swing and descend to remain below the arm body.

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