An automatic assembly device for valve nozzle and valve core

Abstract

This utility model provides an automatic assembly device for valve stems and valve cores, including a transfer mechanism, a feeding mechanism, and a screwing mechanism. The transfer mechanism includes a transfer disk that rotates circumferentially and has several station holes arranged circumferentially on its surface. The feeding mechanism and the screwing mechanism are located on the side of the transfer disk at the front. The feeding mechanism includes a first feeding plate and a second feeding plate. The screwing mechanism screws the valve core in the station hole to fix it to the valve stem above. The valve stem assembly process is broken down into steps by the transfer mechanism. The valve core and valve stem are pre-positioned and automatically screwed on the transfer disk. The entire process realizes automatic feeding, automatic positioning, and automatic screwing assembly, achieving fully automated operation and high work efficiency.

Description

Technical Field

[0001] This utility model relates to an automatic assembly line, and more particularly to an automatic assembly device for valve stems and valve cores. Background Technology

[0002] The valve stem is a one-way valve used to inflate or deflate a tire, playing a crucial role in tire operation. It mainly consists of the valve stem body and valve core, among other key components. Because these components are relatively small, a sealing test is required after assembly to assess the valve stem's sealing performance. Current technologies often break down the assembly process into separate steps, using multiple dedicated production lines to handle each step. However, this single-step operation, relying on manual handling, requires human assistance and is inefficient.

[0003] Especially during the assembly of valve stems and valve cores, because valve cores are small in size, they need to be positioned and prepared for installation in the designated position on the valve stem, which is not easy to achieve with existing assembly line operations. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing valve assembly cannot achieve full-process automation and has low operating efficiency. This utility model provides an automatic valve assembly line to solve the above problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automatic assembly device for valve nozzles and valve cores, including a transfer mechanism, a feeding mechanism, and a screwing mechanism. The transfer mechanism includes a transfer disk, which rotates circumferentially and has a plurality of station holes arranged on its surface along the circumferential direction. The feeding mechanism and the screwing mechanism are arranged on the side of the transfer disk located at the first position. The feeding mechanism includes a first feeding tray and a second feeding tray. The first feeding tray contains valve cores, and the first feeding tray picks up the valve cores in sequence and places them into the station holes. The second feeding tray contains valve nozzles, and the second feeding tray picks up the valve nozzles in sequence and places them onto the valve cores in the station holes. The screwing mechanism screws the valve cores in the station holes to fix them to the valve nozzles above.

[0006] Further: The feeding mechanism includes a first feeding tray, a first feeding claw, a second feeding tray, and a second feeding claw. The first feeding tray contains a valve core, and the second feeding tray contains a valve nozzle. A first fixture is provided on the station hole of the first-position turntable. The first feeding claw clamps the valve core in the first feeding tray and places it onto the first fixture in sequence. The second feeding claw clamps the valve nozzle in the second feeding tray and places it onto the valve core in the first fixture.

[0007] Further: The turning mechanism includes a turning bracket, a turning clamping cylinder, a turning motor, and a turning linear module. The turning linear module is vertically mounted on the turning bracket. The turning motor is vertically mounted on the turning linear module and correspondingly positioned below the work station hole. A turning chuck is provided on the output shaft of the turning motor. The turning clamping cylinder is vertically mounted on the upper end of the turning bracket. The piston rod of the turning clamping cylinder extends to press the lower valve nozzle against the first fixture. The turning motor moves vertically under the drive of the turning linear module and causes the turning chuck to engage with the valve core in the first fixture.

[0008] The beneficial effects of this utility model are that the automatic valve assembly line of this application breaks down the valve assembly process in sequence through the transfer mechanism. The valve core and valve are pre-positioned and automatically screwed on the transfer plate. The entire process realizes automatic feeding, automatic positioning and automatic screwing assembly, and the entire process is automated, with high work efficiency. Attached Figure Description

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] Figure 1 This is a schematic diagram of the entire process of an automatic valve assembly line according to this utility model.

[0011] Figure 2 This is a partial structural diagram of the feeding mechanism;

[0012] Figure 3 This is a schematic diagram of the screwing mechanism;

[0013] Figure 4 and Figure 5 This is a schematic diagram of the pressure measuring mechanism and its partial structure;

[0014] Figure 6 This is a schematic diagram of the installation structure of the turntable located at the end, along with its capping mechanism, marking mechanism, and unloading mechanism.

[0015] Figure 7 This is a partial structural diagram of the cap-attaching mechanism;

[0016] Figure 8 and Figure 9 This is a schematic diagram of the structure of the first and second transport devices.

[0017] In the diagram: 1. Transfer mechanism; 2. Feeding mechanism; 3. Twisting mechanism; 4. Pressure measuring mechanism; 5. Capping mechanism; 6. Marking mechanism; 7. Unloading mechanism; 8. Turntable; 9. First conveying device; 10. Second conveying device; 11. Valve nozzle; 12. Valve core; 13. Collection box; 14. First feeding tray; 15. First feeding claw; 16. Second feeding tray; 17. Second feeding claw; 18. First fixture; 19. Twisting bracket; 20. Twisting and clamping cylinder; 21. Twisting motor; 22. Twisting straight... 23. Wire module, 24. Twisting chuck, 25. Second fixture, 26. Pressure testing fixture, 27. Pressure testing plate, 28. Pressure testing cylinder, 29. Pressure testing seat, 30. Pressure testing air passage, 31. Air pipe connector, 32. Lifting cylinder, 33. Turntable, 34. Transport plate, 35. Transport gripper, 36. Third loading tray, 37. Third loading claw, 38. Cap mounting bracket, 39. Cap mounting clamping cylinder, 40. Cap, 41. Cap mounting drive module, 42. Laser marking gun, 43. Unloading claw. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0022] like Figures 1 to 9 As shown, this utility model provides an automatic assembly line for valve stems 11, including a transfer mechanism 1, a feeding mechanism 2, a screwing mechanism 3, a pressure measuring mechanism 4, a capping mechanism 5, a marking mechanism 6, and a unloading mechanism 7.

[0023] The transfer mechanism 1 includes three transfer disks 8 arranged in sequence. A first conveying device 9 is provided between the first transfer disk 8 and the middle transfer disk 8, and a second conveying device 10 is provided between the middle transfer disk 8 and the last transfer disk 8. The transfer disk 8 rotates circumferentially and has a plurality of workstation holes arranged circumferentially on its disk surface.

[0024] The feeding mechanism 2 and the twisting mechanism 3 are located on the side of the first turntable 8. The feeding mechanism 2 sequentially picks up the valve core 12 and the valve nozzle 11 and places them on the station hole of the turntable 8. The twisting mechanism 3 twists the valve core 12 in the station hole to fix it to the valve nozzle 11 above.

[0025] The pressure measuring mechanism 4 is located on the side of the turntable 8 in the middle position to perform pressure testing on the valve 11 on the turntable 8 in the middle position. The second conveying device 10 is provided with a collection box 13 on its side.

[0026] The capping mechanism 5, marking mechanism 6 and unloading mechanism 7 are sequentially arranged on the side of the last turntable 8 to perform capping, marking and unloading operations on the valve 11 on the last turntable 8.

[0027] This application's automatic valve assembly line 11 is used to realize the automatic assembly, pressure testing, capping, and marking of valve stems 11 and valve cores 12. To address the different clamping and fixing methods for valve stems 11 under different process operations, three sequentially arranged rotary tables 8 are used. Specifically, the first rotary table 8 is mainly responsible for the feeding and assembly operations of valve cores 12 and valve stems 11. A screwing mechanism 3 is used to install the valve core 12 onto the valve stem 11. After assembly, the valve stem 11 is transferred to the middle rotary table 8 via a first conveying device 9.

[0028] On the intermediate turntable 8, the pressure testing mechanism 4 tests the pressure of the assembled valve 11 to test its sealing performance. After the pressure test, the valve 11 is transferred to the final rotating disk by the second conveying device 10. During the conveying process of the second conveying device 10, the valves 11 that fail the test after being picked up by the pressure testing mechanism 4 are dropped into the collection box 13. This can realize the automatic sorting of defective products and ensure that the subsequent capping mechanism 5, marking mechanism 6 and unloading mechanism 7 are all operated on qualified products.

[0029] On the final turntable 8, the valve stem 11 is capped and marked. After completion, it is directly unloaded, and the assembled and tested valve stem 11 products are collected. This automated assembly line integrates multiple work processes, realizes fully automated flow, and has high work efficiency.

[0030] The feeding mechanism 2 includes a first feeding tray 14, a first feeding claw 15, a second feeding tray 16, and a second feeding claw 17. The first feeding tray 14 contains a valve core 12, and the second feeding tray 16 contains a valve nozzle 11. A first fixture 18 is provided on the workstation hole of the first-position turntable 8. The first feeding claw 15 clamps the valve core 12 in the first feeding tray 14 and places it onto the first fixture 18. The second feeding claw 17 clamps the valve nozzle 11 in the second feeding tray 16 and places it onto the valve core 12 in the first fixture 18.

[0031] The twisting mechanism 3 includes a twisting bracket 19, a twisting clamping cylinder 20, a twisting motor 21, and a twisting linear module 22. The twisting linear module 22 is vertically mounted on the twisting bracket 19. The twisting motor 21 is vertically mounted on the twisting linear module 22 and is correspondingly positioned below the work station hole. A twisting chuck 23 is provided on the output shaft of the twisting motor 21. The twisting clamping cylinder 20 is vertically mounted on the upper end of the twisting bracket 19. The piston rod of the twisting clamping cylinder 20 extends to press the lower valve 11 against the first fixture 18. The twisting motor 21 moves vertically under the drive of the twisting linear module 22 and causes the twisting chuck 23 to engage with the valve core 12 in the first fixture 18.

[0032] The feeding mechanism 2 uses a first feeding tray 14 and a second feeding tray 16 to pick up valve nozzles 11 and valve cores 12 respectively, realizing automatic feeding operation. The first feeding tray 14 feeds the valve nozzles 11 one by one to the side of the first-positioned transfer tray 8. The first feeding claw 15 grabs the valve cores 12 in the first feeding tray 14 and places them into the first holder 18 on the transfer tray 8. Then, the second feeding claw 17 clamps the valve nozzles 11 and places them on the valve cores 12 in the first holder 18. At this time, the valve nozzles 11 are placed on the valve cores 12, but they are not assembled and tightened together.

[0033] The piston rod of the screw-tightening cylinder 20 extends and presses the valve stem 11 onto the first fixture 18. Then, the screw-tightening linear module 22 drives the screw-tightening motor 21 to move upward, so that the screw-tightening chuck 23 fits onto the valve core 12 below the valve stem 11. The screw-tightening motor 21 works, and the output shaft rotates, which drives the screw-tightening chuck 23 to rotate, thereby tightening the valve core 12 onto the valve stem 11, thus completing the installation operation of the valve stem 11.

[0034] This structure enables automated assembly of valve cores 12 and valve stems 11 on the turntable 8. As the turntable 8 rotates, the workstation holes can be switched sequentially at the discharge position of the feeding mechanism 2, thereby enabling the sequential switching and assembly of different workstation hole positions on the turntable 8, which improves the assembly efficiency.

[0035] A second fixture 24 is provided on the workstation hole on the middle-positioned turntable 8. The pressure measuring mechanism 4 includes a pressure measuring fixing frame 25 and a pressure measuring plate 26 that is slidably mounted on the pressure measuring fixing frame 25 in the vertical direction. A pressure measuring cylinder 27 is vertically mounted on the pressure measuring fixing frame 25. The piston rod of the pressure measuring cylinder 27 is fixedly connected to the pressure measuring plate 26 and drives the pressure measuring plate 26 to move in the vertical direction. A pressure measuring seat 28 is provided on the pressure measuring seat 28. A pressure measuring air passage 29 is provided on the pressure measuring air passage 29. An air pipe connector 30 is provided at the upper end of the pressure measuring air passage 29. A pressure measuring air pipe is connected to the air pipe connector 30. The pressure measuring plate 26 is positioned above the turntable 8 in the middle position. The pressure measuring seat 28 moves downward to seal and press the pressure measuring seat 28 against the upper end face of the valve 11 on the turntable 8.

[0036] Because the positioning and clamping positions of the valve stem 11 are different during assembly and pressure testing, the valve stem 11 is placed on the turntable 8 located in the middle to enable pressure testing of the valve stem 11. During testing, the pressure testing plate 26 moves downward under the drive of the pressure testing cylinder 27, sealing and pressing the pressure testing seat 28 against the upper surface of the valve stem 11 on the turntable 8. Then, compressed air is supplied through the pressure testing air pipe, and the compressed air is filled into the pressure testing seat 28 and the valve stem 11 below through the pressure testing air passage 29. The air pressure value in the pressure testing air pipe is monitored. When the air pressure drops to the threshold, the valve stem 11 cannot maintain pressure, and the valve stem 11 has an air leakage phenomenon. It is judged as a defective product. When the second conveying device 10 transfers the valve stem 11, it will be automatically dropped into the collection box 13 and will not flow backward.

[0037] This air pressure detection method can perform pressure holding tests on multiple valves 11 simultaneously in one test, which is highly efficient. Moreover, it does not require machine shutdown and alarm when defective products are found. The second conveying device 10 performs sorting processing, which improves the efficiency of air pressure detection and ensures the normal operation of the assembly line.

[0038] Both the first fixture 18 and the second fixture 24 are hollow structures; in the first rotating plate 8, the bottom end of the valve 11 is placed on the first fixture 18; in the middle rotating plate 8, the top end of the valve 11 is placed on the second fixture 24.

[0039] To address the different positioning and clamping requirements of valve stem 11 in different processes, a first fixture 18 and a second fixture 24 are used for positioning and clamping. The first fixture 18 is used to position the lower end face of valve core 12 and valve stem 11, while the second fixture 24 is mainly used to position and fix the upper end face of valve stem 11. The first fixture 18 is mainly used to accurately position the relative positions of valve core 12 and valve stem 11 during installation, while the second fixture 24 is mainly used to accurately position the clamping part of valve seat during pressure testing.

[0040] The first transport device 9 and the second transport device 10 both include a lifting cylinder 31 and a turntable 32 mounted on the lifting cylinder 31. The turntable 32 is provided with a transport plate 33 and a plurality of transport grippers 34 are provided on the transport plate 33. The plurality of transport grippers 34 are arranged in an arc shape corresponding to the work position hole position on the turntable 8.

[0041] The lifting cylinder 31 and the turntable 32 work together to transfer valves 11 on different turntables 8. Several transport grippers 34 can be set up to transport multiple valves 11 simultaneously in one transport action. Since the transport grippers 34 are independently controlled, valves 11 with problems can be sorted independently by controlling the transport grippers 34 individually.

[0042] The capping mechanism 5 includes a third feeding tray 35, a third feeding claw 36, a capping bracket 37, a capping clamping cylinder 38, and a capping motor 39. The third feeding tray 35 contains caps 40. The capping bracket 37 is vertically equipped with a capping drive module 41. The capping motor 39 is vertically positioned below the last turntable 8 at the position corresponding to the work station hole. The capping drive module 41 drives the capping motor 39 to move up and down. The output shaft of the capping motor 39 is equipped with a cap 40 chuck. The third feeding claw 36 clamps the caps 40 in the third feeding tray 35 and places them onto the cap 40 chuck.

[0043] The capping mechanism 5 is used to assemble the cap 40 onto the valve stem 11 that has already undergone pressure testing. The cap 40 will be placed on the bottom of the valve stem 11. Therefore, when needed, the third feeding plate 35 and the third feeding claw 36 will transport the cap 40 to be assembled to the cap 40 chuck. Then, the capping motor 39 moves upward and drives the cap 40 chuck to rotate and tighten the cap 40 onto the bottom of the valve stem 11.

[0044] The marking mechanism 6 includes a laser marking gun 42, which is positioned to mark the workstation holes on the last rotating disk 8. The laser marking gun 42 marks each valve 11 on the rotating disk 8 one by one.

[0045] The feeding mechanism 7 includes a feeding claw 43 located on one side of the turntable 8 at the end position, which grips the valve 11 in the station hole.

[0046] The finished valve 11, which has undergone assembly, pressure testing, capping, and marking, is removed from the rotary table 8 by the unloading claw 43 for subsequent processing. This assembly line is fully automated from loading to unloading, requiring no manual intervention and achieving high operational efficiency.

[0047] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An automatic assembly device for valve stems and valve cores, characterized in that: The device includes a transfer mechanism (1), a feeding mechanism (2), and a screwing mechanism (3). The transfer mechanism (1) includes a transfer disk (8), which rotates circumferentially and has several workstation holes on its surface along the circumferential direction. The feeding mechanism (2) and the screwing mechanism (3) are located on the side of the first transfer disk (8). The feeding mechanism (2) sequentially picks up the valve core (12) and the valve nozzle (11) and places them on the workstation holes of the transfer disk (8). The screwing mechanism (3) screws the valve core (12) in the workstation hole to fix it to the valve nozzle (11) above.

2. The automatic assembly equipment for valve stems and valve cores as described in claim 1, characterized in that: The feeding mechanism (2) includes a first feeding plate (14), a first feeding claw (15), a second feeding plate (16), and a second feeding claw (17). The first feeding plate (14) contains a valve core (12), and the second feeding plate (16) contains a valve nozzle (11). A first fixture (18) is provided on the station hole of the first-position turntable (8). The first feeding claw (15) clamps the valve core (12) in the first feeding plate (14) and places it onto the first fixture (18) in sequence. The second feeding claw (17) clamps the valve nozzle (11) in the second feeding plate (16) and places it onto the valve core (12) in the first fixture (18).

3. The automatic assembly equipment for valve stems and valve cores as described in claim 2, characterized in that: The twisting mechanism (3) includes a twisting bracket (19), a twisting clamping cylinder (20), a twisting motor (21), and a twisting linear module (22). The twisting linear module (22) is vertically mounted on the twisting bracket (19). The twisting motor (21) is vertically mounted on the twisting linear module (22) and correspondingly positioned below the work station hole. A twisting chuck (23) is provided on the output shaft of the twisting motor (21). The twisting clamping cylinder (20) is vertically mounted on the upper end of the twisting bracket (19). The piston rod of the twisting clamping cylinder (20) extends to press the lower valve (11) onto the first fixture (18). The twisting motor (21) moves vertically under the drive of the twisting linear module (22) and causes the twisting chuck (23) to engage with the valve core (12) in the first fixture (18).

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