Assembling device

Abstract

The utility model discloses an assembling device, which is used for pressing a positioning plug into an assembly hole on a middle frame of a mobile phone, and comprises an up-down floating structure or an angle floating structure connected to the output end of a transfer mechanism and a suction head connected to the output end of the up-down floating structure or the angle floating structure, the suction head is driven by the transfer mechanism to be inserted into the penetrating hole of the positioning plug and adsorb and fix the positioning plug, the fixed positioning plug is pressed into the assembly hole, and the positioning plug is pressed into the assembly hole in an up-and-down adjustable or angle adjustable mode through the up-and-down floating structure or the angle floating structure in the pressing process. The suction head is provided with at least one vacuum suction nozzle, the vacuum suction nozzle is provided with an abutting portion matched with the rear side wall of the positioning plug in an abutting mode and an inserting portion protruding into the penetrating hole from the abutting portion, a first adsorption hole for adsorbing and fixing the rear side wall is formed in the abutting portion, and a second adsorption hole for adsorbing and fixing the inner wall of the penetrating hole is formed in the inserting portion.

Description

Technical Field

[0001] The utility model relates to an assembly device for electronic products, in particular to an assembly device for pressing a positioning plug with certain elasticity into an assembly hole of a mobile phone middle frame. Background Art

[0002] With the rapid development of science and technology and the continuous improvement of people's consumption level, the requirements for the quality of electronic products such as mobile phones, tablets, headphones, etc. are getting higher and higher. While requiring high quality, they also pursue a design-oriented appearance. Therefore, more and more electronic products are designed to be smaller, lighter, and often have a certain curvature. Therefore, electronic products are also developing towards high-density integration and ultra-precision. Correspondingly, the requirements for assembly equipment for electronic products are also getting higher and higher.

[0003] Among them, in order to achieve the effective assembly of the microphone metal mesh in the assembly hole of the mobile phone middle frame, after the microphone metal mesh is mounted in the assembly hole, it is often necessary to press the positioning plug into the assembly hole of the middle frame to encapsulate the metal mesh mounted in the middle frame in the assembly hole. At present, the positioning plug is mostly pressed into the assembly hole by hand. The pressing force of manual pressing cannot be effectively controlled, resulting in the inability to effectively guarantee the pressing accuracy. In addition, manual assembly also has the problem of low efficiency, especially when the assembly hole is not set straight, but has a certain inclination, the difficulty of manual assembly is even greater. In addition, since it is an interference fit, the positioning plug made of plastic is often difficult to position during the assembly process due to its own elasticity, resulting in inefficient assembly. There is also a problem of part of the positioning plug being withdrawn from the assembly hole due to the rebound force, resulting in poor pressing effect, which is not suitable for the high efficiency requirements of the production line.

[0004] Therefore, a simple structure, high assembly precision and high efficiency assembly device is needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a connecting device with simple structure, high assembly precision and high efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an assembly device for press-fitting a positioning plug into an assembly hole of a mobile phone middle frame, wherein a through hole recessed toward the front side wall is provided on the rear side wall of the positioning plug, and the assembly device comprises an up-and-down floating structure or an angle floating structure connected to the output end of a transfer mechanism, and a suction head connected to the up-and-down floating structure or the output end of the angle floating structure, wherein the suction head is inserted into the through hole of the positioning plug under the drive of the transfer mechanism and adsorbs and fixes the positioning plug, and also adsorbs and fixes the adsorbed fixed plug under the drive of the transfer mechanism. The fixed positioning plug is pressed into the assembly hole of the mobile phone middle frame, and during the pressing process, the fixed positioning plug is pressed into the assembly hole in an adjustable manner up and down or in an adjustable angle through the up and down floating structure or the angle floating structure, wherein the suction head has at least one vacuum suction nozzle, the vacuum suction nozzle has an abutting portion abutting against the rear side wall of the positioning plug and an inserting portion protruding from the abutting portion into the penetration hole, the abutting portion is provided with a first adsorption hole for adsorbing and fixing the rear side wall, and the inserting portion is provided with a second adsorption hole for adsorbing and fixing the inner wall of the penetration hole.

[0007] Preferably, the first adsorption hole is relatively horizontally arranged at the relatively upper side end of the abutting portion, and the second adsorption hole has a front section adsorption hole that is relatively horizontally arranged at the relatively lower side end of the abutting portion and extends horizontally to the plug-in portion, and a rear section adsorption hole in the plug-in portion that is vertically connected with the front section adsorption hole.

[0008] Preferably, the abutting portion of the vacuum suction nozzle has an abutting inclined surface corresponding to the shape of the rear side wall of the corresponding positioning plug, and the suction head has three vacuum suction nozzles arranged in a straight line.

[0009] Preferably, the plug-in portion protrudes from the relatively middle and lower ends of the abutting portion, so that the abutting end of the abutting portion is divided into an upper abutting end and a lower abutting end located at upper and lower opposite sides of the plug-in portion, and the area of ​​the upper abutting end is larger than the area of ​​the lower abutting end.

[0010] Preferably, the vacuum suction nozzle further has an avoidance position arranged at an upper connection or a lower connection between the abutting portion and the plug-in portion.

[0011] Preferably, the up and down floating structure includes a connecting plate, a mounting seat and a vacuum joint, the connecting plate is connected to the output end of the transfer mechanism, the mounting seat is slid on the vertical linear guide rail of the connecting plate, the suction head is installed on the mounting seat separated from the vacuum joint, and the vacuum joint is respectively connected to the first suction hole and the second suction hole of each vacuum suction nozzle.

[0012] Preferably, the up and down floating structure also includes an adapter plate and an elastic member, one end of the two adapter plates are arranged on the left and right opposite sides of the connecting plate in a one-to-one correspondence, the other ends of the two adapter plates extend forward to the bottom side ends on the left and right opposite sides of the mounting seat, and the elastic members telescopically arranged along the vertical direction are respectively provided between the top side end of the mounting seat and the connecting plate and between the bottom side end of the mounting seat and the two adapter plates.

[0013] Preferably, the angle floating structure includes a connecting plate, a mounting seat, an upper spring plunger, a lower spring plunger and a vacuum joint, the connecting plate is connected to the output end of the transfer mechanism, the relative rear end of the mounting seat is pivotally connected to the mounting groove of the connecting plate, the upper spring plunger and the lower spring plunger are symmetrically arranged on the upper and lower opposite sides of the mounting groove, corresponding to the top wall and the bottom wall of the mounting seat in a telescopic manner, the suction head and the vacuum joint are spaced apart and arranged at the relative front end of the mounting seat, and the vacuum joint is respectively connected to the first suction hole and the second suction hole of each suction head.

[0014] Preferably, the suction head has a balanced state in which the upper spring plunger and the lower spring plunger are both uncompressed, a state in which the lower spring plunger is compressed with a reduced angle, and a state in which the upper spring plunger is compressed with an increased angle.

[0015] Preferably, a pressure sensor is further provided between the output end of the transfer mechanism and the up-and-down floating structure or the angle floating structure.

[0016] Compared with the prior art, the suction head of the assembly device provided by the utility model has at least one vacuum suction nozzle, and the vacuum suction nozzle has an abutting portion that abuts and cooperates with the rear side wall of the positioning plug and an inserting portion that protrudes from the abutting portion into the through hole of the positioning plug. Since the abutting portion is provided with a first suction hole and the inserting portion is provided with a second suction hole, during assembly, the inserting portion is inserted into the through hole of the positioning plug to achieve efficient alignment, and the positioning plug with a certain elasticity is supported and fixed, effectively avoiding excessive deformation during the press-fitting process, and the rear side wall of the positioning plug is adsorbed and fixed through the first suction hole, and the inner wall of the through hole is adsorbed and fixed through the second suction hole, thereby aligning the positioning plug from both inside and outside. The positioning plug is adsorbed and fixed more stably and effectively; and, through the up and down floating structure or the angle floating structure connected to the output end of the moving mechanism, the suction head is driven to press-fit the fixed positioning plug into the assembly hole of the mobile phone middle frame in an adjustable up and down or angle manner, and the incoming material tolerance of the positioning plug is automatically compensated, thereby improving the assembly accuracy and assembly efficiency, and is not only suitable for press-fitting in straight assembly holes, but also suitable for press-fitting in assembly holes with a certain inclination, effectively improving the adaptability of the device; the overall structure of the assembly device of the utility model is simple, and multiple vacuum suction nozzles can be arranged on a suction head, so that multiple positioning plugs can be pressed each time, further improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the first embodiment of the assembly device of the utility model.

[0018] Figure 2 It is a plan view of the first embodiment of the assembly device of the utility model.

[0019] Figure 3 It is a plan view of the up and down floating structure in the first embodiment.

[0020] Figure 4 For along Figure 3 Cross-sectional view along the AA direction.

[0021] Figure 5 for Figure 4 Enlarged view of part B.

[0022] Figure 6 It is a three-dimensional diagram of the second embodiment of the assembly device of the utility model.

[0023] Figure 7 It is a plan view of the second embodiment of the assembly device of the utility model.

[0024] Figure 8 It is a plan view of the angle floating structure in the second embodiment.

[0025] Fig. 9 For along Figure 8 Cross-sectional view in CC direction DETAILED DESCRIPTION

[0026] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0027] See also Figures 1 to 9The utility model provides an assembly device 100, which is used to press-fit the positioning plug 200 into the assembly hole of the mobile phone middle frame, so as to encapsulate the microphone metal mesh attached to the assembly hole of the mobile phone middle frame in the assembly hole. It should be noted that the assembly device 100 of the utility model can not only realize the press-fitting operation of the positioning plug 200 in the assembly hole arranged relatively straight on the mobile phone middle frame, but also realize the press-fitting operation of the positioning plug 200 in the assembly hole arranged obliquely on the mobile phone middle frame. Among them, the relative rear side wall of the positioning plug 200 is an inclined surface, and the front side wall thereof is a plane. In terms of the left and right directions, the outer contour of the positioning plug 200 is in the shape of a trapezoid. In addition, the rear side wall of the positioning plug 200 has a through hole 200a that is recessed in the direction of its front side wall, and the through hole 200a is specifically a through hole. In addition, the front side end of the positioning plug 200 is inwardly retracted relative to its rear side end and has a certain taper, so as to facilitate press-fitting into the assembly hole of the mobile phone middle frame.

[0028] See below Figures 1 to 5 , the structure and working principle of the first embodiment of the assembly device 100 of the utility model are described:

[0029] See also Figure 1 and Figure 2 In general, the assembly device 100 provided in the first embodiment of the utility model includes an up-and-down floating structure 20 connected to the output end of the transfer mechanism 10 and a suction head 30 connected to the output end of the up-and-down floating structure 20. In specific operation, the transfer mechanism 10 drives the suction head 40 to move back and forth between the feed mechanism of the positioning plug 200 and the middle frame of the mobile phone, so that the suction head 30 can be inserted into the through hole 200a of the positioning plug 200 and the positioning plug 200 is adsorbed and fixed. The transfer mechanism 10 also drives the suction head 30 to press the adsorbed and fixed positioning plug 200 into the assembly hole of the middle frame of the mobile phone, and during the press-fitting process, the fixed positioning plug 200 is press-fitted into the assembly hole of the middle frame of the mobile phone in an adjustable manner up and down through the up-and-down floating structure 20, thereby compensating for the incoming material tolerance of the positioning plug 200 and effectively achieving precise assembly. The suction head 30 has at least one vacuum suction nozzle 31. When there are multiple vacuum suction nozzles 31, multiple positioning plugs 200 can be pressed each time, which effectively improves the assembly efficiency. Figure 1 and Figure 3 As shown, the suction head 31 has three vacuum suction nozzles 31 arranged in a straight line, and can realize the press-fitting operation of three positioning plugs 200 each time. Of course, the number of vacuum suction nozzles 31 can also be 2 or 4, etc., and is not limited thereto.

[0030] See also Figure 1 and Figure 2Specifically, the transfer mechanism 10 can not only drive the suction head 30 to move linearly in the up-down direction, left-right direction, and front-back direction, but also drive the suction head 30 to rotate, so as to more efficiently and conveniently realize the picking, delivery, and pressing operation of the positioning plug 200, and is more flexible to use and suitable for the needs of automated production lines. Among them, the moving mechanism 10 can adopt a structure combining a three-axis linear module and a rotary module. Preferably, a six-axis robot or a four-axis robot can be used, which has more flexible transfer, higher precision, and less space occupation. Among them, as Figure 1 As shown, the output end of the transfer mechanism 10 has an "L"-shaped positioning seat 11, and the up and down floating structure 20 is installed on the positioning seat 11. The suction head 30 is in a vertical position convenient for taking materials. During press-fitting, the suction head 30 is driven by the transfer mechanism 10 to rotate from the vertical position to the position as shown in FIG. Figure 2 The relatively horizontal position shown in the figure can be moved in the front-rear direction under the drive of the transfer mechanism 10 to realize the press-fitting operation.

[0031] Furthermore, a pressure sensor 12 is also provided between the output end of the transfer mechanism 10 and the up-and-down floating structure 20. Specifically, the up-and-down floating structure 20 is slidably disposed on the linear guide rail 111 of the positioning seat 11 along the front-and-back direction, and the pressure sensor 12 is telescopically connected between the positioning seat 11 and the up-and-down floating structure 20 through an elastic member 13 arranged along the front-and-back direction, thereby monitoring the magnitude of the pressing force provided by the transfer mechanism 10, and effectively preventing damage to the middle frame of the mobile phone and the microphone metal mesh. The elastic member 13 is specifically a compression spring. It should be noted that, for ease of understanding, the up, down, left, right, front and back directions involved in this application use the suction head 30 in a relatively horizontal position as a reference reference, the front-and-back direction corresponds to the longitudinal direction of the suction head 30, the left-and-right direction corresponds to the lateral width direction of the suction head 30, and the up-and-down direction corresponds to the height direction of the suction head 30, as shown in FIG. Figure 1 and Figure 2 The hollow arrow indicates the direction.

[0032] See also Figure 4 and Figure 5 Specifically, the vacuum suction nozzle 31 has an abutting portion 311 that abuts against the rear side wall of the positioning plug 200 and an inserting portion 312 that protrudes from the abutting portion 311 into the penetration hole 200a. A first adsorption hole 313 is provided in the abutting portion 311 for adsorbing and fixing the rear side wall of the positioning plug 200, and a second adsorption hole 314 is provided in the inserting portion 312 for adsorbing and fixing the inner wall of the penetration hole 200a, thereby adsorbing and fixing the positioning plug 200 from both the inner and outer sides, effectively improving the stability of adsorption positioning, and accordingly, effectively improving the accuracy of the suction head 30 to achieve adjustable press-fitting up and down under the drive of the up and down floating structure 203.

[0033] Specifically, the first adsorption hole 313 is arranged relatively horizontally at the upper side end of the abutting portion 311, so as to achieve adsorption fixation from the relatively front side to the rear side wall of the abutting positioning plug 200. The second adsorption hole 314 has a front adsorption hole 3141 arranged relatively horizontally at the lower side end of the abutting portion 311 and horizontally extending to the plug-in portion 312, and a rear adsorption hole 3142 in the plug-in portion 312 vertically connected to the front adsorption hole 3141, so as to achieve adsorption fixation from the relatively side to the inner wall of the penetration hole 200a. Specifically, the first adsorption hole 313 is in the shape of a letter "I", and the second adsorption hole 314 is in the shape of an "L".

[0034] Specifically, the abutting portion 311 of the vacuum suction nozzle 31 has an abutting inclined surface corresponding to the shape of the rear side wall of the corresponding positioning plug 200, so as to achieve more accurate adsorption positioning through close fit. Among them, only the abutting surface of the abutting portion 311 abutting against the positioning plug 200 can be set as an inclined surface corresponding to the shape of the rear side wall of the positioning plug 200, or the abutting portion 311 can be set to be arranged in an inclined manner, both of which can achieve close fit with the rear side wall.

[0035] Specifically, the plug-in portion 312 protrudes from the relatively middle and lower ends of the abutting portion 311, so that the abutting end of the abutting portion 311 is divided into an upper abutting end and a lower abutting end located at the upper and lower opposite sides of the plug-in portion 312, and the area of ​​the upper abutting end is larger than the area of ​​the lower abutting end.

[0036] Specifically, the vacuum nozzle 31 also has an avoidance position W arranged at the upper connection or the lower connection of the abutting portion 311 and the plug-in portion 312, so that the recognition device can recognize the position coordinates of the positioning plug 200 adsorbed and fixed by the vacuum nozzle 31 through the avoidance position W. Figure 5 As shown, the upper abutting end of the plug part 312 is tightly fitted with the rear side wall of the positioning plug 200, and there is a relief position W between the lower abutting end of the plug part 312 and the rear side wall of the positioning plug 200. The relief position W is cut from the connection between the lower ends of the abutting part 311 and the plug part 312.

[0037] Combination Figures 1 to 4 Specifically, the up and down floating structure 20 includes a connecting plate 21, a mounting seat 22 and a vacuum joint 23. The connecting plate 21 is connected to the output end of the transfer mechanism 10. The mounting seat 22 is slidably arranged on the vertical linear guide rail 211 of the connecting plate 21. The suction head 30 is arranged on the mounting seat 22 separated from the vacuum joint 23, and the vacuum joint 23 is respectively connected to the first suction hole 313 and the second suction hole 314 of each vacuum suction nozzle 31, so that the suction operation of each vacuum suction nozzle 31 is realized by connecting with an external vacuum device.

[0038] Furthermore, the up-and-down floating structure 20 further includes an adapter plate 24 and an elastic member 25, one end of the two adapter plates 24 is correspondingly arranged on the left and right opposite sides of the connecting plate 21, and the other end of the two adapter plates 24 extends forward to the bottom side ends of the left and right opposite sides of the mounting seat 22, and elastic members 25 are respectively arranged in a telescopic manner along the vertical direction between the top side end of the mounting seat 22 and the connecting plate 21 and between the bottom side end of the mounting seat 22 and the two adapter plates 24, so that the press-fitting position of the suction head 30 is automatically adjusted through the telescopic movement of the elastic member 25 along the up-and-down direction, so as to compensate for the incoming material deviation of the positioning plug 200, and effectively improve the press-fitting accuracy. Specifically, the elastic member 25 adopts a compression spring, and the number of the elastic members 25 on the upper and lower sides can be 2, respectively, so as to achieve a more stable floating adjustment.

[0039] See below Figures 6 to 9 , the structure and working principle of the second embodiment of the assembly device 100 of the utility model are described:

[0040] See also Figure 6 and Figure 7 , the difference between this embodiment and the first embodiment mainly lies in the difference in the adjustment structure. In general, the assembly device 100 provided in the second embodiment of the utility model includes an angle floating structure 40 connected to the output end of the transfer mechanism 10 and a suction head 30 connected to the output end of the angle floating structure 40. When working, the transfer mechanism 10 drives the suction head 40 to move back and forth between the feeding mechanism of the positioning plug 200 and the middle frame of the mobile phone, so that the suction head 30 can be inserted into the through hole 200a of the positioning plug 200 and adsorb and fix the positioning plug 200. The transfer mechanism 10 also drives the suction head 30 to press the adsorbed and fixed positioning plug 200 into the assembly hole of the middle frame of the mobile phone, and during the press-fitting process, the fixed positioning plug 200 is press-fitted into the assembly hole of the middle frame of the mobile phone with an adjustable angle through the angle floating structure 40, thereby compensating for the incoming material tolerance of the positioning plug 200 and effectively realizing precise assembly.

[0041] Specifically, in this embodiment, the specific structure of the transfer mechanism 10 is basically the same as that in the first embodiment, and a pressure sensor 12 is also provided between the output end of the transfer mechanism 10 and the angle floating structure 40. The pressure sensor 12 is also telescopically connected between the positioning seat 11 and the angle floating structure 40 through an elastic member 13 arranged along the front-to-back direction. In addition, the specific structure of the suction head 30 in this embodiment is also basically the same as that in the first embodiment, and the structures of the transfer mechanism 10 and the suction head 30 are not described in detail here.

[0042] Combination Figures 6 to 9Specifically, the angle floating joint 40 includes a connecting plate 41, a mounting seat 42, an upper spring plunger 43, a lower spring plunger 44 and a vacuum joint 45. The connecting plate 41 is connected to the output end of the transfer mechanism 10, and the relatively rear side end of the mounting seat 42 is pivoted in the mounting groove of the connecting plate 41, and the mounting seat 42 is specifically pivoted to the connecting plate 41 through a pivot shaft 46. The upper spring plunger 43 and the lower spring plunger 44 are symmetrically arranged on the upper and lower opposite sides of the mounting groove, and are telescopically abutted against the top wall and the bottom wall of the mounting seat 42, specifically, the relative rear sides of the pivot ends of the mounting seat 42 and the connecting plate 41 are abutted against the mounting seat 42. Among them, the distance from the upper spring plunger 43 and the lower spring plunger 44 to the pivot shaft 46 is smaller than the distance from the vacuum suction nozzle 31 to the pivot shaft 46. The suction head 30 and the vacuum connector 45 are spaced apart and arranged at the opposite front side end of the mounting base 42, and the vacuum connector 45 is respectively connected to the first suction hole 313 and the second suction hole 314 of each vacuum suction nozzle 31, so that the suction operation of each vacuum suction nozzle 31 is realized by connecting with an external vacuum device.

[0043] Specifically, the suction head 30 has a balanced state where the upper spring plunger 43 and the lower spring plunger 44 are not compressed, a state where the lower spring plunger 44 is compressed with a reduced angle, and a state where the upper spring plunger 43 is compressed with an increased angle. During operation, the suction head 30 is adjusted by a small rotation of the mounting seat 42 around the pivot shaft 46 relative to the connecting plate 41, and the upper spring plunger 43 and the lower spring plunger 44 are elastically compressed and matched to achieve precise press-fitting. The rotation range of the suction head 30 is between plus or minus 3°.

[0044] Compared with the prior art, the suction head 40 of the assembly device 100 provided by the utility model has at least one vacuum suction nozzle 41, and the vacuum suction nozzle 41 has an abutting portion 411 abutting against the rear side wall of the positioning plug 200 and an inserting portion 412 protruding from the abutting portion 411 into the penetration hole 200a, the abutting portion 411 is provided with a first suction hole 413, and the inserting portion 412 is provided with a second suction hole 414. When assembling, the inserting portion 412 is inserted into the penetration hole 200a of the positioning plug 200 to achieve efficient alignment, and the positioning plug 200 with a certain elasticity is supported and fixed, effectively avoiding excessive deformation during the press-fitting process, and the rear side wall of the positioning plug 200 is adsorbed and fixed through the first suction hole 413, and the penetration hole 200 is fixed through the second suction hole 414 extending into the penetration hole 200a. The inner wall of a is adsorbed and fixed, so that the positioning plug 200 is adsorbed and fixed from both the inside and outside sides more stably and effectively; and, during the press-fitting process, the up and down floating structure 20 or the angle floating structure 30 connected to the output end of the moving mechanism 10 drives the suction head 40 to press-fit the fixed positioning plug 200 into the assembly hole of the mobile phone middle frame in an adjustable manner up and down or in an adjustable angle, and automatically compensates for the incoming material tolerance of the positioning plug 200, thereby effectively improving the assembly accuracy and assembly efficiency, not only adapting to the press-fitting in straight assembly holes, but also adapting to the press-fitting in assembly holes with a certain inclination, effectively improving the adaptability of the device; the overall structure of the assembly device 100 of the utility model is simple. When the suction head 40 is designed with multiple vacuum nozzles 41, multiple positioning plugs 200 can be pressed each time, further improving the assembly efficiency.

[0045] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. An assembly device for press-fitting a positioning plug into an assembly hole of a mobile phone middle frame, characterized in that: The rear side wall of the positioning plug is provided with a through hole recessed in the direction of the front side wall. The assembly device includes an up-and-down floating structure or an angle floating structure connected to the output end of the transfer mechanism, and a suction head connected to the output end of the up-and-down floating structure or the angle floating structure. The suction head is inserted into the through hole of the positioning plug under the drive of the transfer mechanism and adsorbs and fixes the positioning plug. The adsorbed and fixed positioning plug is also pressed into the assembly hole of the mobile phone middle frame under the drive of the transfer mechanism. In the pressing process, the fixed positioning plug is adjusted up and down or angle-adjustable by the up-and-down floating structure or the angle floating structure. The suction head has at least one vacuum suction nozzle, and the vacuum suction nozzle has an abutting portion abutting and cooperating with the rear side wall of the positioning plug and an inserting portion protruding from the abutting portion into the through hole. The abutting portion is provided with a first adsorption hole for adsorbing and fixing the rear side wall, and the inserting portion is provided with a second adsorption hole for adsorbing and fixing the inner wall of the through hole.

2. The assembly device according to claim 1, characterized in that: The first adsorption hole is relatively horizontally arranged at the relatively upper side end of the abutting part, the second adsorption hole has a front section adsorption hole which is relatively horizontally arranged at the relatively lower side end of the abutting part and horizontally extends to the plug-in part, and a rear section adsorption hole in the plug-in part which is vertically connected with the front section adsorption hole.

3. The assembly device according to claim 1, characterized in that: The abutting portion of the vacuum suction nozzle has an abutting inclined surface corresponding to the shape of the rear side wall of the corresponding positioning plug, and the suction head has three vacuum suction nozzles arranged in a straight line.

4. The assembly device according to claim 1, characterized in that: The plug-in portion is protruded from the relatively middle and lower ends of the abutting portion, so that the abutting end of the abutting portion is divided into an upper abutting end and a lower abutting end located at two opposite sides of the plug-in portion, and the area of ​​the upper abutting end is larger than that of the lower abutting end.

5. The assembly device according to claim 1, characterized in that: The vacuum suction nozzle also has an avoidance position arranged at an upper connection or a lower connection between the abutting portion and the plug-in portion.

6. The assembly device according to claim 1, characterized in that: The up and down floating structure includes a connecting plate, a mounting seat and a vacuum joint, the connecting plate is connected to the output end of the transfer mechanism, the mounting seat is slidably arranged on the vertical linear guide rail of the connecting plate, the suction head is installed on the mounting seat separated from the vacuum joint, and the vacuum joint is respectively connected to the first suction hole and the second suction hole of each vacuum suction nozzle.

7. The assembly device according to claim 6, characterized in that: The up and down floating structure also includes an adapter plate and an elastic member, one end of the two adapter plates are arranged on the left and right opposite sides of the connecting plate in a one-to-one correspondence, and the other ends of the two adapter plates extend forward to the bottom side ends of the left and right opposite sides of the mounting seat, and the elastic members arranged telescopically along the vertical direction are respectively provided between the top side end of the mounting seat and the connecting plate and between the bottom side end of the mounting seat and the two adapter plates.

8. The assembly device according to claim 1, characterized in that: The angle floating structure includes a connecting plate, a mounting seat, an upper spring plunger, a lower spring plunger and a vacuum joint. The connecting plate is connected to the output end of the transfer mechanism. The relatively rear side end of the mounting seat is pivotally connected to the mounting groove of the connecting plate. The upper spring plunger and the lower spring plunger are symmetrically arranged on the upper and lower opposite sides of the mounting groove, and are telescopically abutted against the top wall and the bottom wall of the mounting seat. The suction head and the vacuum joint are spaced apart and arranged on the relatively front side end of the mounting seat, and the vacuum joint is respectively connected to the first suction hole and the second suction hole of each suction head.

9. The assembly device according to claim 8, characterized in that: The suction head has a balanced state in which the upper spring plunger and the lower spring plunger are both uncompressed, a state in which the lower spring plunger is compressed with a reduced angle, and a state in which the upper spring plunger is compressed with an increased angle.

10. The assembly device according to claim 1, characterized in that: A pressure sensor is also provided between the output end of the transfer mechanism and the up-and-down floating structure or the angle floating structure.

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