Rotary hidden type handle assembling production line

Abstract

The invention discloses a rotary hidden type handle assembling production line which comprises bottom shell code printing and damper mounting equipment 1, balancing weight and handle assembling equipment 2, pin shaft assembling and screw locking equipment 3, wire drawing deflector rod, iron core column and spring assembling and screw locking equipment 4, tolerance absorber assembling equipment 5, handle testing and detecting equipment 6 and appearance detecting equipment 7. Wherein a first conveying module 8 is arranged among the bottom shell code printing and damper mounting equipment 1, the balancing weight and handle assembling equipment 2 and the pin shaft assembling and screw locking equipment 3, and a second conveying module 9 is arranged among the wire drawing deflector rod, iron core column and spring assembling and screw locking equipment 4 and the tolerance absorber assembling equipment 5; products are manually transferred and overturned between the first conveying module 8 and the second conveying module 9, and the products are manually transferred from the second conveying module 9 to the handle testing and detecting device 6.

Description

Technical Field

[0001] The invention relates to the technical field of automated production, in particular to an assembly production line for a rotary hidden handle. Background Art

[0002] Under the background that traditional handles are easy to collide, take up space and affect the overall aesthetics, as well as the advancement of manufacturing technology and the improvement of consumers' requirements for product quality, the rotating hidden handle came into being. It is mainly composed of a handle body, a rotating shaft, a hidden groove and a locking device. Normally, the handle body can be rotated and stored in the hidden groove with the help of the rotating shaft, flush with the surface of the object, and in a hidden state. When it is needed, the locking device is released by pressing, rotating and other operations, and the handle body can be rotated out of the hidden groove to meet people's needs for opening and closing. With this unique design, it not only solves the drawbacks of traditional handles, but also meets people's yearning for a simple and refined life. It is gradually widely used in many fields such as furniture, automotive interiors, and electronic products.

[0003] For example: China's patent application publication number is CN109958348A for a hidden handle assembly, China's patent application publication number is CN113700397A for a hidden outward-opening handle mounting structure, a door and a car, and China's patent authorization announcement number is CN218467380U for a hidden handle. However, currently, the assembly and production of hidden handles on the market are usually performed manually, or semi-automatically by manually matching equipment, resulting in low production efficiency, high labor intensity and high production costs. Especially with the rapid development of new energy vehicles, the current hidden handle assembly and production methods are difficult to meet market demand.

[0004] In view of this, the inventor proposes the following technical solution. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a rotary hidden handle assembly production line.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a rotating hidden handle assembly production line, comprising: bottom shell coding and damper installation equipment, counterweight and handle assembly equipment, pin assembly and screw locking equipment, wire drawing lever and core column and spring assembly and screw locking equipment, tolerance absorber assembly equipment, handle testing and inspection equipment, and appearance inspection equipment, wherein a first transmission module is arranged between the bottom shell coding and damper installation equipment and the counterweight and handle assembly equipment and the pin assembly and screw locking equipment, a second transmission module is arranged between the wire drawing lever and core column and spring assembly and screw locking equipment and the tolerance absorber assembly equipment, and products are manually transferred and flipped between the first transmission module and the second transmission module, and the products are manually transferred from the second transmission module to the handle testing and inspection equipment.

[0007] Furthermore, in the above technical solution, the first transfer module includes a jig, an upper speed chain and a lower speed chain for transferring the jig, and a first lifting device and a second lifting device arranged at both ends of the upper speed chain and the lower speed chain and used to transfer the jig, wherein the jig is provided with a cavity for installing and positioning the bottom shell assembly; the second transfer module has the same structure as the first transfer module.

[0008] Furthermore, in the above technical solution, the bottom shell coding and damper installation equipment includes a first frame for supporting a first conveying module, a laser engraving machine arranged beside the first conveying module and used for coding on the bottom shell assembly, a first CCD detection mechanism arranged above the first conveying module and used for detecting whether the pre-installed parts on the bottom shell assembly are complete, a damper assembly mechanism arranged beside the first conveying module and used for assembling the damper on the bottom shell assembly, and a first oil spraying mechanism arranged beside the damper assembly mechanism and used for applying oil to the damper.

[0009] Furthermore, in the above technical scheme, the counterweight and handle assembly equipment includes a second frame for supporting the first conveying module, a second oil spraying mechanism arranged beside the first conveying module and used for rotating and positioning the counterweight into the bottom shell assembly and applying oil, a counterweight feeding mechanism arranged beside the first conveying module and used for automatically providing the counterweight, a handle pre-positioning mechanism arranged beside the first conveying module and used for manually placing the handle assembly, and a first assembly robot arranged beside the first conveying module and used for grabbing the counterweight and the handle assembly and installing them in the bottom shell assembly.

[0010] Furthermore, in the above technical solution, the pin assembly and screw locking equipment includes a third frame for supporting the first transmission module, a pin assembly mechanism arranged next to the first transmission module and used to install the pin into the bottom shell assembly, and a first screw installation mechanism arranged next to the first transmission module and used to lock the screws.

[0011] Furthermore, in the above technical solution, the first screw installation mechanism includes a first vibration plate that automatically arranges and sends out the first screw, a first straight vibrator arranged at the discharge end of the first vibration plate and used to transmit the first screw, a first material dividing device arranged at the end of the first straight vibrator, a first reversing device arranged beside the first material dividing device and used to grab the first screw to adjust the direction, a first X-axis motion module arranged between the first reversing device and the first transmission module, a second Y-axis motion module arranged on the first X-axis motion module, a first Z-axis motion module arranged on the second Y-axis motion module, and a first material picking and adjusting device arranged on the first Z-axis motion module and used to grab the first screw for installation.

[0012] Furthermore, in the above technical scheme, the wire drawing rod, core column and spring assembly and screw locking equipment includes a fourth frame for supporting a second conveying module, a third oil spraying mechanism arranged beside the second conveying module and used for applying oil to the bottom shell assembly, a bearing pre-positioning platform arranged beside the third oil spraying mechanism and used for placing the assembled wire drawing rod and torsion spring, a wire drawing rod assembly mechanism arranged above the bearing pre-positioning platform and the second conveying module and used for assembling the wire drawing rod and the rod torsion spring onto the bottom shell assembly, a second screw installation mechanism arranged beside the second conveying module and used for locking screws to fix the wire drawing rod, a core column feeding mechanism and a spring feeding mechanism arranged beside the second conveying module and used for providing core columns and springs respectively, a second assembly robot arranged above the second conveying module and used for assembling the core columns and springs onto the bottom shell assembly, and a second detection mechanism arranged beside the second assembly robot and used for detecting whether the core columns and springs are missing.

[0013] Furthermore, in the above technical solution, the second screw installation mechanism includes a second vibration plate that automatically arranges and sends out the second screws, a second straight vibrator arranged at the discharge end of the second vibration plate and used to transmit the second screws, a second material dividing device arranged at the end of the second straight vibrator, a first positioning module arranged next to the second material dividing device and used to clamp and fix the bottom shell assembly on the second conveying module, and a screw locking robot arranged next to the second conveying module and used to grab the second screws and fix them to the bottom shell assembly, wherein the first positioning module is provided with a plurality of slots corresponding to the second screw installation holes.

[0014] Furthermore, in the above technical solution, the tolerance absorber assembly equipment includes a fifth frame for supporting a second conveying module, a tolerance absorber feeding mechanism disposed on the fifth frame and used for automatically feeding out the tolerance absorber, a third assembly robot disposed beside the tolerance absorber feeding mechanism and used for installing the tolerance absorber on the bottom shell assembly, an assembly fastening mechanism disposed above the second conveying module and used for pressing the tolerance absorber, and a second CCD detection mechanism disposed above the second conveying module and used for detecting whether a large part is missing.

[0015] Furthermore, in the above technical solution, the handle test detection equipment includes a sixth frame arranged next to the second conveying module, a third conveying module arranged on the sixth frame and used to transfer the bottom shell assembly, a third CCD detection mechanism arranged on the third conveying module and used to detect the sealing gasket and the upper cover, a handle opening test mechanism arranged next to the third CCD detection mechanism and used to test the handle opening force, and a handle return test mechanism arranged next to the handle opening test mechanism and used to test the handle return force.

[0016] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art: in the present invention, the bottom shell coding and damper installation equipment are used to code and identify the bottom shell assembly and automatically assemble the damper to the bottom shell assembly, and the counterweight block and handle assembly equipment are further used to assemble the counterweight block and the handle assembly to the bottom shell assembly, and the pin shaft is further installed on the bottom shell assembly and the first screw is locked by the pin shaft assembly and the screw locking equipment, and the wire drawing lever and the iron core column and spring assembly and screw locking equipment are further used to draw the lever and lock the second screw, and then the iron core column and the spring are assembled to the bottom shell assembly, and the tolerance absorber assembly equipment is further used to install the tolerance absorber on the bottom shell assembly, and the handle test and detection equipment is further used to detect the opening and return of the installed product, and finally the product appearance is detected by the appearance detection equipment, and the first transmission module and the second transmission module are used to cooperate with manual transfer and transmission of the bottom shell assembly, as well as manual auxiliary loading, so as to realize the automatic assembly and production of hidden handles, greatly improve production efficiency, reduce labor costs, and meet the current production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the first transmission module in the present invention; Figure 3 It is a structural schematic diagram of the bottom shell coding and damper installation equipment in the present invention; Figure 4 It is a schematic diagram of the structure of the counterweight block and handle assembly device of the present invention; Figure 5 It is a structural schematic diagram of the pin assembly and screw locking device in the present invention; Figure 6 is a schematic diagram of the overall structure of the second transmission module in the present invention; Figure 7 It is a structural schematic diagram of the wire drawing lever, the core column and the spring assembly and the screw locking device in the present invention; Figure 8 It is a schematic diagram of the structure of the tolerance absorber assembly device in the present invention; Fig. 9It is a structural schematic diagram of the handle test and detection equipment in the present invention; Fig.10 It is a structural schematic diagram of the first screw installation mechanism in the present invention; Fig.11 It is a structural schematic diagram of the second screw installation mechanism in the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments and drawings.

[0019] See Figures 1 to 11 As shown, a rotary hidden handle assembly production line includes: bottom shell coding and damper installation equipment 1, counterweight and handle assembly equipment 2, pin assembly and screw locking equipment 3, wire drawing lever and core column and spring assembly and screw locking equipment 4, tolerance absorber assembly equipment 5, handle test and inspection equipment 6, and appearance inspection equipment 7, wherein a first transmission module 8 is arranged between the bottom shell coding and damper installation equipment 1 and the counterweight and handle assembly equipment 2 and the pin assembly and screw locking equipment 3, a second transmission module 9 is arranged between the wire drawing lever and core column and spring assembly and screw locking equipment 4 and the tolerance absorber assembly equipment 5, and products are manually transferred and flipped between the first transmission module 8 and the second transmission module 9, and the products are manually transferred from the second transmission module 9 to the handle test and inspection equipment 6.

[0020] The bottom shell coding and damper installation equipment 1 is used to code and identify the bottom shell assembly and automatically assemble the damper to the bottom shell assembly, and the counterweight and handle assembly equipment 2 further assembles the counterweight and handle assembly to the bottom shell assembly, and the pin shaft assembly and screw locking equipment 3 further installs the pin shaft on the bottom shell assembly and locks the first screw A, and the wire drawing lever, iron core column and spring assembly and screw locking equipment 4 further installs the wire drawing lever and the second screw, and then the iron core column and the spring are assembled to the bottom shell assembly, and the tolerance absorber assembly equipment 5 further installs the tolerance absorber on the bottom shell assembly, and the handle testing and detection equipment 6 further performs opening and return detection on the installed product, and finally the appearance of the product is inspected by the appearance inspection equipment 7, and the first conveying module 8 and the second conveying module 9 cooperate with manual transfer and transmission of the bottom shell assembly, as well as manual auxiliary loading, thereby realizing the automatic assembly and production of hidden handles, greatly improving production efficiency, reducing labor costs, and meeting current production needs.

[0021] The first transmission module 8 includes a jig 81, an upper speed chain 82 and a lower speed chain 83 for transferring the jig 81, and a first lifting device 84 and a second lifting device 85 arranged at both ends of the upper speed chain 82 and the lower speed chain 83 and used to transfer the jig 81, wherein the jig 81 is provided with a cavity for installing and positioning the bottom shell component; the second transmission module 9 has the same structure as the first transmission module 8. The first lifting device 84 and the second lifting device 85 are used to cooperate with the upper speed chain 82 and the lower speed chain 83 to cyclically transfer the jig 81 to realize continuous transfer of the bottom shell component, wherein the difference between the second transmission module 9 and the first transmission module 8 is that the positioning cavity of the jig is different, which is mainly because the second transmission module 9 transfers the bottom shell component after flipping it over to facilitate the installation of subsequent parts.

[0022] The bottom shell coding and damper installation equipment 1 includes a first frame 11 for supporting a first conveying module 8, a laser engraving machine 12 arranged beside the first conveying module 8 and used for coding on the bottom shell assembly, a first CCD detection mechanism 13 arranged above the first conveying module 8 and used for detecting whether the pre-installed parts on the bottom shell assembly are complete, a damper assembly mechanism 14 arranged beside the first conveying module 8 and used for assembling the damper on the bottom shell assembly, and a first oil spraying mechanism 15 arranged beside the damper assembly mechanism 14 and used for applying oil to the damper.

[0023] The counterweight and handle assembly equipment 2 includes a second frame 21 for supporting the first conveying module 8, a second oil spraying mechanism 22 arranged beside the first conveying module 8 and used for rotating and positioning the counterweight into the bottom shell assembly for oiling, a counterweight feeding mechanism 23 arranged beside the first conveying module 8 and used for automatically providing the counterweight, a handle pre-positioning mechanism 24 arranged beside the first conveying module 8 and used for manually placing the handle assembly, and a first assembly robot 25 arranged beside the first conveying module 8 and used for grabbing the counterweight and handle assembly and installing them in the bottom shell assembly.

[0024] The pin assembly and screw locking device 3 includes a third frame 31 for supporting the first transmission module 8, a pin assembly mechanism 32 arranged beside the first transmission module 8 and used to install the pin into the bottom shell assembly, and a first screw installation mechanism 33 arranged beside the first transmission module 8 and used to lock the screws.

[0025] The first screw installation mechanism 33 includes a first vibration plate 331 that automatically arranges and sends out the first screw, a first straight vibrator 332 arranged at the discharge end of the first vibration plate 331 and used to transmit the first screw, a first material distribution device 333 arranged at the end of the first straight vibrator 332, a first reversing device 334 arranged beside the first material distribution device 333 and used to grab the first screw to adjust the direction, a first X-axis motion module 335 arranged between the first reversing device 334 and the first transmission module 8, a second Y-axis motion module 336 arranged on the first X-axis motion module 335, a first Z-axis motion module 337 arranged on the second Y-axis motion module 336, and a first material picking and adjusting device 338 arranged on the first Z-axis motion module 337 and used to grab the first screw for installation.

[0026] The wire drawing lever, core column and spring assembly and screw locking equipment 4 includes a fourth frame 41 for supporting the second conveying module 9, a third oil spraying mechanism 42 arranged beside the second conveying module 9 and used for applying oil to the bottom shell assembly, a bearing pre-positioning platform 43 arranged beside the third oil spraying mechanism 42 and used for placing and assembling the wire drawing lever and torsion spring, a wire drawing lever assembly mechanism 44 arranged above the bearing pre-positioning platform 43 and the second conveying module 9 and used for assembling the wire drawing lever and the lever torsion spring onto the bottom shell assembly, a second screw installation mechanism 45 arranged beside the second conveying module 9 and used for screwing and fixing the wire drawing lever, a core column feeding mechanism 46 and a spring feeding mechanism 47 arranged beside the second conveying module 9 and used for providing the core column and the spring respectively, a second assembly robot 48 arranged above the second conveying module 9 and used for assembling the core column and the spring onto the bottom shell assembly, and a second detection mechanism 49 arranged beside the second assembly robot 48 and used for detecting whether the core column and the spring are missing.

[0027] The second screw installation mechanism 45 includes a second vibration plate 451 that automatically arranges and sends out the second screws, a second straight vibrator 452 arranged at the discharge end of the second vibration plate 451 and used to transmit the second screws, a second material distribution device 453 arranged at the end of the second straight vibrator 452, a first positioning module 454 arranged next to the second material distribution device 453 and used to clamp and fix the bottom shell assembly on the second conveying module 9, and a screw locking robot 455 arranged next to the second conveying module 9 and used to grab the second screws and fix them to the bottom shell assembly, wherein the first positioning module 454 is provided with a plurality of slots 4541 corresponding to the second screw installation holes.

[0028] The tolerance absorber assembly equipment 5 includes a fifth frame 51 for supporting the second conveying module 9, a tolerance absorber feeding mechanism 52 arranged on the fifth frame 51 and used for automatically feeding out the tolerance absorber, a third assembly robot 53 arranged beside the tolerance absorber feeding mechanism 52 and used for installing the tolerance absorber on the bottom shell assembly, an assembly fastening mechanism 54 arranged above the second conveying module 9 and used for pressing the tolerance absorber, and a second CCD detection mechanism 55 arranged above the second conveying module 9 and used for detecting whether there are any large missing parts.

[0029] The handle test detection equipment 6 includes a sixth frame 61 arranged next to the second transmission module 9, a third transmission module 62 arranged on the sixth frame 61 and used to transfer the bottom shell assembly, a third CCD detection mechanism 63 arranged on the third transmission module 62 and used to detect the sealing gasket and the upper cover, a handle opening test mechanism 64 arranged next to the third CCD detection mechanism 63 and used to test the handle opening force, and a handle return test mechanism 65 arranged next to the handle opening test mechanism 64 and used to test the handle return force.

[0030] In summary, when the present invention is working, the bottom shell assembly is manually installed and positioned on the fixture 81 of the first conveying module 8, and the bottom shell assembly is sequentially transferred through the bottom shell coding and damper installation equipment 1, the counterweight and handle assembly equipment 2 and the pin assembly and screw locking equipment 3 by the first conveying module 8; further, when the first conveying module 8 transfers the bottom shell assembly through the bottom shell coding and damper installation equipment 1, the laser engraving machine 12 engraves and codes on the bottom shell assembly to determine the type of the bottom shell assembly, which is convenient for the installation of subsequent parts, and then the first CCD detection mechanism 13 takes a photo of the bottom shell assembly for detection to determine whether the pre-installed parts of the bottom shell assembly are complete, and then the damper assembly mechanism 14 The damper is automatically fed and assembled, and during the automatic assembly process of the damper, a certain amount of lubricating oil is sprayed into the damper by the first oil spraying mechanism 15; further, when the first conveying module 8 conveys the bottom shell assembly through the counterweight block and handle assembly equipment 2, the second oil spraying mechanism 22 first sprays lubricating oil into the installation position of the bottom shell assembly, and then the handle assembly is manually installed and placed on the handle pre-positioning mechanism 23, and the counterweight block feeding mechanism 23 automatically arranges and sends out the counterweight block, and then the first assembly robot 25 grabs the counterweight block and the handle assembly and assembles them on the bottom shell assembly; further, when the first conveying module 8 conveys the bottom shell assembly through the pin assembly and screw locking device 3, the pin assembly mechanism 3 2 The pin shaft is automatically loaded and assembled on the bottom shell component, and then the first screw installation mechanism 33 installs the first screw on the bottom shell component to complete the parts assembly on the front side of the bottom shell component; further, the bottom shell component is manually removed from the fixture 81 of the first conveying module 8, and after turning it over, it is installed on the fixture of the second conveying module 9, and then the second conveying module 9 transfers the bottom shell component 1 through the drawing lever, the core column, the spring assembly and the screw locking device 4 and the tolerance absorber assembly device 5; further, when the second conveying module 9 conveys the bottom shell component through the drawing lever, the core column, the spring assembly and the screw locking device 4, the third spraying mechanism 42 first sprays the lubricant into the predetermined installation position on the bottom shell component. Lubricating oil, and at the same time, two symmetrical groups of torsion springs and wire drawing levers are manually placed on the bearing pre-positioning platform 43 for assembly, and the wire drawing lever assembly mechanism 44 grabs the wire drawing lever and torsion spring assembly and installs them on the bottom shell assembly, and then the second screw installation mechanism 45 installs the second screw on the bottom shell assembly, and at the same time, the core column feeding mechanism 46 and the spring feeding mechanism 47 automatically arrange the core column and the spring to the bottom of the second assembly robot 48, and then the second assembly robot 48 grabs the core column and the spring assembly and installs them on the bottom shell assembly, and then the second detection mechanism 49 touches the installation position on the bottom shell assembly to determine whether the core column, spring and other parts are missing;Furthermore, when the second conveying module 9 conveys the bottom shell assembly through the tolerance absorber assembly equipment 5, the tolerance absorber material mechanism 52 automatically arranges and sends out the tolerance absorbers, and then the third assembly machine hand 53 installs the three tolerance absorbers on the bottom shell assembly in sequence, and presses the assembled tolerance absorbers on the bottom shell assembly through the assembly fastening mechanism 54, and then the second CCD detection mechanism 55 takes a photo of the bottom shell assembly for detection, so as to determine whether there are any missing parts; further, the bottom shell assembly is manually removed from the fixture on the second conveying module 9, turned over and transferred to the third conveying module 62 of the handle test and detection equipment 6, and the sealing gasket and the upper cover are manually assembled on the bottom shell assembly to complete the production. After the product is assembled, the third conveying module 62 sequentially transfers the product to the third CCD detection mechanism 64, the handle opening test mechanism 64 and the handle return test mechanism 65. The third CCD detection mechanism 64 first performs a missing detection on the product 1, and then the handle opening test mechanism 64 moves the handle assembly to perform an opening test, and finally the handle return test mechanism 65 presses the handle assembly back to its original position for testing; further, the product is manually removed from the third conveying module 62, and after the model is determined by scanning and testing with a barcode scanner in the appearance inspection device 7, the product is placed in the appearance inspection device 7 for observation. After judging that the product appearance is flawless, the product is placed in the finished product collection box, completing the production and assembly of the entire handle. ;

[0031] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A rotary hidden handle assembly production line, characterized in that: include: A bottom shell coding and damper installation device (1), a counterweight and handle assembly device (2), a pin assembly and screw locking device (3), a wire drawing lever, a core column and a spring assembly and screw locking device (4), a tolerance absorber assembly device (5), a handle test and inspection device (6), and an appearance inspection device (7), wherein a first transmission module (8) is arranged between the bottom shell coding and damper installation device (1) and the counterweight and handle assembly device (2) and the pin assembly and screw locking device (3), and a second transmission module (9) is arranged between the wire drawing lever, a core column and a spring assembly and screw locking device (4) and the tolerance absorber assembly device (5), and products are manually transferred and turned between the first transmission module (8) and the second transmission module (9), and products are manually transferred from the second transmission module (9) to the handle test and inspection device (6).

2. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The first transfer module (8) comprises a jig (81), an upper double-speed chain (82) and a lower double-speed chain (83) for transferring the jig (81), and a first lifting device (84) and a second lifting device (85) arranged at both ends of the upper double-speed chain (82) and the lower double-speed chain (83) and used to transfer the jig (81), wherein a cavity for mounting and positioning a bottom shell component is arranged on the jig (81); and the second transfer module (9) has the same structure as the first transfer module (8).

3. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The bottom shell coding and damper installation device (1) comprises a first frame (11) for supporting a first conveying module (8), a laser engraving machine (12) arranged beside the first conveying module (8) and used for coding on the bottom shell component, a first CCD detection mechanism (13) arranged above the first conveying module (8) and used for detecting whether the pre-installed parts on the bottom shell component are complete, a damper assembly mechanism (14) arranged beside the first conveying module (8) and used for assembling the damper onto the bottom shell component, and a first oil spraying mechanism (15) arranged beside the damper assembly mechanism (14) and used for applying oil to the damper.

4. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The counterweight and handle assembly device (2) comprises a second frame (21) for supporting a first conveying module (8), a second oil spraying mechanism (22) arranged beside the first conveying module (8) and used for rotating and positioning the counterweight into the bottom shell assembly for oiling, a counterweight feeding mechanism (23) arranged beside the first conveying module (8) and used for automatically providing the counterweight, a handle pre-positioning mechanism (24) arranged beside the first conveying module (8) and used for manually placing the handle assembly, and a first assembly robot (25) arranged beside the first conveying module (8) and used for grabbing the counterweight and handle assembly and installing them into the bottom shell assembly.

5. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The pin assembly and screw locking device (3) comprises a third frame (31) for supporting the first transmission module (8), a pin assembly mechanism (32) arranged beside the first transmission module (8) and used for installing the pin into the bottom shell assembly, and a first screw mounting mechanism (33) arranged beside the first transmission module (8) and used for screwing and fixing.

6. The assembly line of a rotary hidden handle according to claim 5, characterized in that: The first screw installation mechanism (33) comprises a first vibration plate (331) for automatically arranging and sending out the first screw, a first straight vibrator (332) arranged at the discharge end of the first vibration plate (331) and used for transmitting the first screw, a first material distribution device (333) arranged at the end of the first straight vibrator (332), a first reversing device (334) arranged beside the first material distribution device (333) and used for grabbing the first screw to adjust the direction, a first X-axis motion module (335) arranged between the first reversing device (334) and the first transmission module (8), a second Y-axis motion module (336) arranged on the first X-axis motion module (335), a first Z-axis motion module (337) arranged on the second Y-axis motion module (336), and a first material picking adjustment device (338) arranged on the first Z-axis motion module (337) and used for grabbing the first screw for installation.

7. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The wire drawing lever, core column and spring assembly and screw locking device (4) comprises a fourth frame (41) for supporting a second transmission module (9), a third oil spraying mechanism (42) arranged beside the second transmission module (9) and used for applying oil to the bottom shell assembly, a bearing pre-positioning platform (43) arranged beside the third oil spraying mechanism (42) and used for placing and assembling the wire drawing lever and torsion spring, and a wire drawing lever assembly mechanism arranged above the bearing pre-positioning platform (43) and the second transmission module (9) and used for assembling the wire drawing lever and the lever torsion spring onto the bottom shell assembly. (44), a second screw installation mechanism (45) arranged beside the second conveying module (9) and used for locking screws to fix the wire drawing lever, an iron core column feeding mechanism (46) and a spring feeding mechanism (47) arranged beside the second conveying module (9) and used for providing an iron core column and a spring respectively, a second assembly robot (48) arranged above the second conveying module (9) and used for assembling the iron core column and the spring onto the bottom shell assembly, and a second detection mechanism (49) arranged beside the second assembly robot (48) and used for detecting whether the iron core column and the spring are missing.

8. The assembly line of a rotary hidden handle according to claim 7, characterized in that: The second screw installation mechanism (45) comprises a second vibration plate (451) for automatically arranging and delivering the second screws, a second straight vibrator (452) arranged at the discharge end of the second vibration plate (451) and used for transmitting the second screws, a second material distribution device (453) arranged at the end of the second straight vibrator (452), a first positioning module (454) arranged beside the second material distribution device (453) and used for clamping and fixing the bottom shell component on the second conveying module (9), and a screw locking robot (455) arranged beside the second conveying module (9) and used for grabbing the second screws and fixing them to the bottom shell component, wherein the first positioning module (454) is provided with a plurality of notches (4541) corresponding to the second screw installation holes.

9. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The tolerance absorber assembly device (5) comprises a fifth frame (51) for supporting a second conveying module (9), a tolerance absorber feeding mechanism (52) disposed on the fifth frame (51) and used for automatically feeding out the tolerance absorber, a third assembly robot (53) disposed beside the tolerance absorber feeding mechanism (52) and used for mounting the tolerance absorber on a bottom shell assembly, an assembly fastening mechanism (54) disposed above the second conveying module (9) and used for pressing the tolerance absorber, and a second CCD detection mechanism (55) disposed above the second conveying module (9) and used for detecting whether a large part is missing.

10. The assembly line of a rotary hidden handle according to claim 1, characterized in that: The handle test detection device (6) comprises a sixth frame (61) arranged beside the second transmission module (9), a third transmission module (62) arranged on the sixth frame (61) and used to transfer the bottom shell component, a third CCD detection mechanism (63) arranged on the third transmission module (62) and used to detect the sealing gasket and the upper cover, a handle opening test mechanism (64) arranged beside the third CCD detection mechanism (63) and used to test the handle opening force, and a handle return test mechanism (65) arranged beside the handle opening test mechanism (64) and used to test the handle return force.

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