CN115722905A

CN115722905A - Automatic assembly production line for display screen

Info

Publication number: CN115722905A
Application number: CN202211407907.0A
Authority: CN
Inventors: 张世模; 赵富豪; 段文波
Original assignee: Shenzhen Transauto Technology Co ltd
Current assignee: Shenzhen Transauto Technology Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-03

Abstract

The invention discloses an automatic assembly production line for display screens, wherein two workpieces in a display screen are arranged on a first fixture, the workpieces are subjected to glue dispensing through a glue dispensing mechanism, the first fixture is conveyed to an assembly mechanism through a conveying mechanism during glue dispensing, the assembly mechanism grabs one workpiece and turns over the workpiece, and then the workpiece is placed in the other workpiece, so that the automatic assembly of the display screen is realized, and the problem that the workpieces cannot be automatically assembled after glue dispensing by an existing glue dispenser is solved.

Description

Automatic assembly production line for display screen

Technical Field

The invention relates to the field of display screen assembly, in particular to an automatic assembly production line for display screens.

Background

The glue dispenser is an automatic machine which specially controls liquid and drips, paints and encapsulates the liquid on the surface of a product or in the product. The glue dripping device is mainly used for accurately dripping, injecting, coating and dripping glue, paint and other liquids to each accurate position of a product in a product process, and can be used for realizing operations such as glue dripping, line drawing and the like. At present, with the rise of various industries in China, the demand on a dispenser is higher and higher, and the requirement on the working efficiency of the dispenser is also higher and higher.

The existing dispenser only has the function of dispensing the workpieces, the subsequent assembly process is still finished by other equipment or manpower, and the automation degree is low.

Disclosure of Invention

The invention mainly aims to provide an automatic assembly production line for a display screen, and aims to solve the problem of low automation degree of a dispenser.

In order to achieve the above object, the present invention provides an automatic assembly line for a display screen, which is used for assembling a second workpiece and a first workpiece, and comprises:

the first clamp comprises a first mounting frame for limiting the first workpiece and a second mounting frame for limiting the second workpiece;

the glue dispensing mechanism comprises a first manipulator, a first visual positioning module and a glue dispensing nozzle, wherein the first visual positioning module is arranged on the first manipulator; the glue dispensing mechanism is used for dispensing glue on the second workpiece and/or the first workpiece;

the assembling mechanism comprises a second manipulator arranged on one side of the dispensing mechanism, a turnover mechanism arranged at the free end of the second manipulator and a second clamp arranged on the turnover mechanism, the second clamp is used for grabbing the first workpiece, the turnover mechanism is used for turning over the second clamp, and the second manipulator is used for transferring the turnover mechanism from the upper part of the first mounting frame to the upper part of the second mounting frame so as to assemble the first workpiece on the second clamp to the second workpiece;

and the conveying mechanism comprises a conveying assembly for conveying the first clamp to flow through the glue dispensing mechanism and the assembling mechanism.

In some embodiments, the first clamp comprises:

a tray;

the first mounting rack comprises a bracket arranged on the tray and a supporting plate arranged at the upper end of the bracket, and the supporting plate is used for mounting the first workpiece;

the second mounting bracket comprises a plurality of supporting columns and a plurality of limiting columns, the supporting columns are arranged on the tray and located on one side of the first mounting bracket, the supporting columns are used for supporting the second workpiece, and the limiting columns surround the periphery of the second workpiece.

In some embodiments, the automated assembly apparatus further comprises:

the second positioning mechanism is used for locking the first clamp passing through the lower part of the second manipulator;

the first lifting mechanism is used for lifting the tray to be separated from the conveying assembly;

and the second lifting mechanism is used for lifting the second workpiece and the second mounting frame to separate from the tray.

In some embodiments, the automated assembly apparatus further comprises:

the second visual positioning module is used for positioning the first workpiece and/or the second workpiece;

and the compensation mechanism is connected with the first lifting mechanism and the second lifting mechanism and used for adjusting the posture of the second workpiece so as to compensate the butt joint error between the second workpiece and the first workpiece.

In some embodiments, the conveying mechanism further comprises a lifting assembly for driving the conveying assembly to lift;

the automatic assembly production line of the display screen further comprises a limiting mechanism arranged above the conveying assembly and located corresponding to the glue dispensing mechanism, and the limiting mechanism is used for fixing a first clamp which is lifted along with the conveying assembly.

In some embodiments, the spacing mechanism comprises a first spacing assembly and a second spacing assembly distributed on both sides of the conveying assembly;

the first limiting assembly comprises a first air cylinder and a first limiting piece arranged on a push rod of the first air cylinder;

the second limiting assembly comprises a second air cylinder and a second limiting piece arranged on a push rod of the second air cylinder;

when the first clamp ascends to a position between the first limiting assembly and the second limiting assembly, push rods of the first air cylinder and the second air cylinder are respectively pushed out to clamp and/or support the tray.

In some embodiments, a first butt joint piece is arranged at one end of the tray close to the first limiting assembly, a butt joint groove is formed between the first butt joint piece and the tray, and the first limiting piece is plugged in the butt joint groove;

one end of the tray, which is close to the second limiting component, is provided with a second butt joint piece, a butt joint hole is formed in the second butt joint piece, and a bolt matched with the butt joint hole is arranged on the second limiting piece.

In some embodiments, the display screen automatic assembly line further includes a first positioning mechanism corresponding to the glue dispensing mechanism, and the first positioning mechanism includes:

the first sensor is fixedly arranged on the conveying mechanism and used for detecting the position of the tray;

and the first locking assembly comprises a first driving piece fixedly arranged on the conveying mechanism and a first stop piece driven by the first driving piece and used for being butted with the tray.

In some embodiments, the bottom of the tray is further provided with a groove, the extending direction of the groove is parallel to the conveying direction of the conveying assembly, and the groove is further provided with a butting protrusion;

the first positioning mechanism further comprises a second locking assembly, the second locking assembly further comprises a second driving piece fixedly arranged on the conveying assembly, and a second stopping piece driven by the second driving piece and used for being butted with the tray, and the first stopping piece and the second stopping piece clamp the butting protrusion to lock the tray.

In some embodiments, the delivery mechanism comprises a plurality of the delivery assemblies, which are configured in turn end-to-end in a circulating line body.

According to the automatic assembly production line of the display screen, the automatic assembly production line of the display screen comprises the first clamp, the glue dispensing mechanism, the assembling mechanism and the conveying mechanism, two workpieces in the display screen are arranged on the first clamp, glue is dispensed on the workpieces through the glue dispensing mechanism, the first clamp is conveyed to the assembling mechanism through the conveying mechanism during glue dispensing, the assembling mechanism grabs one workpiece and overturns the workpiece, and then the workpiece is placed in the other workpiece, so that the automatic assembly of the display screen is realized, and the problem that the workpieces cannot be automatically assembled after glue dispensing of an existing glue dispensing machine is solved.

Drawings

FIG. 1 is a schematic structural diagram of an automatic assembly line for display screens according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a glue dispensing mechanism and a conveying mechanism in the embodiment of FIG. 1;

FIG. 3 is a schematic structural diagram of a first clamp in the embodiment of FIG. 1;

FIG. 4 is a schematic structural view of the first clamp of the embodiment of FIG. 3 from another perspective;

FIG. 5 is a schematic structural diagram of the conveying mechanism in the embodiment of FIG. 1;

FIG. 6 is a schematic structural diagram of a second robot, a turnover mechanism and a transfer assembly in the embodiment of FIG. 1;

FIG. 7 is a schematic structural diagram of a second manipulator, a turnover mechanism and a second fixture in the embodiment of FIG. 6;

FIG. 8 is a schematic structural view of a second clamp of the embodiment of FIG. 6;

FIG. 9 is a schematic diagram illustrating the first lifting mechanism, the second lifting mechanism and the compensating mechanism of the embodiment of FIG. 6;

FIG. 10 is a schematic view of an assembled structure of a first workpiece and a second workpiece according to an embodiment of the invention;

FIG. 11 is a schematic view illustrating a connection structure of the transfer line body and the return line body in the embodiment of FIG. 1;

FIG. 12 is a schematic structural diagram of the steering transmission assembly in the embodiment of FIG. 11.

Detailed Description

The embodiments of the present invention will be described in detail in conjunction with the drawings in the following, and it is to be understood that the embodiments are only a part of the embodiments of the present invention, and not all of the embodiments are described. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators in the embodiments of the present invention, such as up, down, left, right, front, and back, 8230, are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, as shown in the drawings, if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The present invention further provides an automatic assembly line for a display screen, which is used for assembling a second workpiece and a first workpiece, and referring to fig. 1 to 12, the automatic assembly line for a display screen includes:

a first clamp 20 comprising a first mounting 21 for mounting said first workpiece 11 and a second mounting 22 for mounting said second workpiece 12;

the glue dispensing mechanism 30 comprises a first manipulator 31, a first visual positioning module 32 arranged on the first manipulator 31 and a glue dispensing nozzle 35; the dispensing mechanism 30 is used for dispensing the second workpiece and/or the first workpiece;

an assembling mechanism 70 for assembling the first workpiece 11 and the second workpiece 12; the assembling mechanism 70 comprises a second manipulator 71 arranged on one side of the dispensing mechanism, a turnover mechanism 72 arranged at the free end of the second manipulator 71, and a second clamp arranged on the turnover mechanism 72, wherein the second clamp 77 is used for grabbing the first workpiece 11;

a transfer mechanism comprising a transfer assembly 41 for transferring the first gripper 20 through the dispensing mechanism 30 and the assembly mechanism 70.

In the present embodiment, the conveying mechanism includes a plurality of conveying assemblies 41 which can be driven independently and are connected end to end in sequence. Specifically, the conveying assembly 41 adopts a standard conveying module, the conveying assembly 41 includes a mounting frame 41a, synchronizing wheels disposed at four corners of the mounting frame 41a, and a group of synchronizing belts 41b disposed in the mounting frame 41a side by side, each synchronizing belt 41b connects two synchronizing wheels on the same side, the synchronizing wheels on the opposite side are connected by a transmission shaft, and the transmission shaft is driven by a conveying motor 41c to realize the conveying of the first fixture 20 above the synchronizing belts 41 b. Each transmission module is driven independently and is connected end to end in sequence. In this embodiment, one or more dispensing mechanisms 30 are provided, and a transfer assembly 41 is disposed below each dispensing mechanism 30.

The first robot 31 of the dispensing mechanism 30 may be a three-axis orthogonal robot or a swing arm robot having a plurality of joints, the base of the first robot 31 is disposed on both sides of the transfer unit 41, and the first visual alignment module 32, the glue cartridge 33, and the dispensing valve 34 are disposed at the free end of the first robot 31. The first visual positioning module 32 comprises a camera and a light-emitting module, when the camera is used for visual positioning, the lens of the camera and the light-emitting module are arranged in a downward direction, and according to the space coordinate of the free end and the shot picture, the actual space coordinate of the workpiece can be obtained by the coordinate of the workpiece in the picture. Packing element 33 and dispensing valve 34 set up in one side of vision positioning module 32, and packing element 33 communicates with the outside feed cylinder through transmission pipe and the pump body, and the pump body is carried the glue in the feed cylinder to packing element 33, and packing element 33 still communicates with dispensing valve 34, and the lower extreme of dispensing valve 34 sets up the jiao zui, and jiao zui department sets up gluey needle. The dispensing valve 34 adopts a resorption formula dispensing valve 34, which is composed of a cylinder body, a valve body and a dispensing body, the dispensing valve 34 adopts a plunger structure, has resorption function, and solves the problems of non-stop glue, wire drawing and the like of medium and high viscosity media.

Further, a second robot arm 71 and a turnover mechanism 72 and a second jig 77 may be provided at one side of the dispensing mechanism 30. A second gripper 77 for gripping the pallet 21b and the first workpiece 11 on the first gripper 20; the turnover mechanism 72 is connected to the second fixture 77, and is configured to turn the pallet 21b and the first workpiece 11 up and down; the second manipulator 71 is disposed at one side of the dispensing mechanism 30, connected to the turnover mechanism 72, and configured to load the first workpiece 11 after turnover into the second workpiece 12.

Specifically, the second robot 71 may be a three-axis orthogonal robot or a swing arm robot having a plurality of joints, and is disposed on one side of the transfer unit 41. Referring to fig. 8, the turnover mechanism 72 includes a mounting seat 72a provided at a free end of the second robot arm 71, a rotation shaft 72b rotatably provided with the mounting seat 72a, and a turnover motor 72d provided at one side of the mounting seat 72 a. The flipping motor 72d is connected to the rotating shaft 72b to drive the rotating shaft 72b to rotate.

The second clamp 77 is arranged on the rotating shaft 72b to turn over along with the rotating shaft 72b, the second clamp 77 comprises a mounting plate fixedly arranged on the rotating shaft 72b and a suction cup arranged on the mounting plate, the suction cup is communicated with the negative pressure generator to suck the first workpiece 11, a fifth sensor 72e for detecting the turning angle of the rotating shaft 72b is further arranged on the mounting seat 72a, the two sensors are arranged oppositely up and down, and a detection piece for butting with the two sensors is arranged at one end of the rotating shaft 72 b. In the present embodiment the second gripper 77 comprises two extreme positions, one of which is arranged with the suction end of the suction cup facing upwards, and the second gripper 77 can take the first workpiece 11 from below the first workpiece 11 and grip the pallet 21b between the first workpiece 11 and the mounting plate. The second robot 71 then removes the first workpiece 11 and the pallet 21b from the support 21a, and after the first workpiece 11 and the pallet 21b are turned over by the turning mechanism 72, the fixture is at the second limit position, the first workpiece 11 is located below the second fixture 77, and at this time, the second robot 71 then abuts the first workpiece 11 and the second workpiece 12, and the pallet 21b is detached from the second fixture 77 along with the first workpiece 11, and then is pressed on the first workpiece 11 to provide the pressure required for the glue adhesion between the first workpiece 11 and the second workpiece 12.

It is noted that the supporting plate 21b is prevented from shaking during the turning and transferring process after being separated from the supporting frame 21 a. An electromagnet 72c may be disposed on the mounting seat 72a to attract the supporting plate 21b, and after the first workpiece 11 and the second workpiece 12 are butted, the electromagnet 72c is powered off to unlock the supporting plate 21 b.

In some embodiments, referring to fig. 1 to 12, since the dispenser is mainly used for dispensing two workpieces before assembly, different regions of the two workpieces may be dispensed, or one of the two workpieces may be dispensed, and the other workpiece still needs to be placed on the fixture for subsequent assembly. The workpieces in this embodiment include a first workpiece 11 and a second workpiece 12, where the first workpiece 11 is specifically a display module, and the second workpiece is a housing for accommodating the display module. The first clamp 20 comprises a first mounting frame 21 for mounting the first workpiece 11 and a second mounting frame 22 for mounting the second workpiece 12.

The first mounting frame 21 and the second mounting frame 22 are arranged on the tray 23 at intervals. The first mounting frame 21 comprises a bracket 21a arranged on the tray 23 and a supporting plate 21b arranged at the upper end of the bracket 21a, the supporting plate 21b is used for mounting the first workpiece 11, and a limiting protrusion 21c arranged around the periphery of the first workpiece 11 is arranged on the supporting plate 21 b; the second mounting frame 22 includes a plurality of support columns 22a and a plurality of limiting columns 22b, which are disposed on the tray 23 and located on one side of the first mounting frame 21, the support columns 22a are used for supporting the second workpiece 12, and the limiting columns 22b are disposed around the periphery of the second workpiece 12.

In the present embodiment, the first workpiece 11 includes a panel 11b and a first workpiece 11a, the first workpiece 11a is disposed on one side of the panel 11b, one side of the second workpiece 12 is disposed to be opened, and a mounting cavity 12a is disposed inside. The first workpiece 11a is arranged in the mounting cavity 12a, the panel 11b is arranged in the sinking groove 12b at the opening, and the dispenser is used for dispensing one or more components of the mounting cavity 12a, the panel 11b and the first workpiece 11 a. The shape of the pallet 21b conforms to the shape of the panel 11 b. The limiting protrusion 21c is used for positioning the first workpiece 11. One end of the second workpiece 12 is tilted, and the supporting pillar 22a may only receive a non-tilted portion, or may be attached to a lower surface of the tilted portion. The position-limiting column 22b is used for limiting the horizontal sliding of the second workpiece 12.

In some embodiments, referring to fig. 1-12, the automated assembly apparatus further comprises:

a second positioning mechanism 76 for locking the first jig 20 passing under the second robot arm 71;

a first lifting mechanism 73 for lifting the tray 23 off the conveying assembly 41;

a second lifting mechanism 75 for lifting the second workpiece 12 and the second mounting frame 22 off the pallet 23;

in this embodiment, the second positioning mechanism 76 has the same structure as the first positioning mechanism, and mainly includes two locking assemblies and a sensor to clamp both sides of the limiting protrusion 21c to lock the tray 23. With particular reference to fig. 6 and 9, the second positioning mechanism 76 will not be described herein.

The second visual positioning module comprises a first module 81 and a second module 82 which are arranged above the conveying assembly 41 and located on one side of the second manipulator 71, after the first clamp is completely locked, one end of the second workpiece 12 is located in the center of a picture shot by the first module 81, the other end of the second workpiece 12 is located in the center of the picture shot by the second module 81, and accurate positioning of the second workpiece 12 is achieved through the two modules.

Specifically, the first lifting mechanism 73 includes a fixed plate 73a fixedly disposed below the mounting frame 41a, a first lifting cylinder 74b disposed on the fixed plate 73a, a receiving plate 73c disposed at an end of a push rod of the first lifting cylinder 74b, and a push post 73d disposed on the receiving plate 73c, and an opening corresponding to the push post 73d is further disposed at the bottom of the tray 23. The second positioning mechanism 76 is used to initially position the tray 23, and when the tray 23 is locked by the second positioning mechanism 76, the tray 23 still has a certain movement space. Subsequently, the first lifting cylinder 74b drives the push post 73d to ascend and abut against the supporting plate 23, so that the supporting plate 23 ascends, at this time, the supporting plate 23 is completely locked, and the first workpiece 11 and the second Gong's mechanical arm 12 are correspondingly locked, so that the subsequent assembly process can be performed.

In some embodiments, the automatic assembly device further comprises a second visual positioning module and a compensation mechanism, wherein the second visual positioning module is used for positioning the first workpiece 11 and/or the second workpiece 12; the compensation mechanism 74 is connected to the first lifting mechanism 73 and the second lifting mechanism 75, and is used for adjusting the posture of the second workpiece 12 to compensate for the joint error between the second workpiece 12 and the first workpiece 11.

Specifically, the second vision positioning module further includes a third module 83 and a fourth module 84 disposed at one side of the conveying assembly 41 and below the second robot 71. After the first workpiece 11 is taken down, the first workpiece is turned over by the turning mechanism 72 and moves to the detection station on the second manipulator 71, the third module 83 and the fourth module 84 are arranged at the detection station, one end of the first workpiece 11 is located in the center of a picture shot by the third module 83, the other end of the first workpiece 11 is located in the center of a picture shot by the fourth module 84, and the first workpiece 11 is accurately positioned through the two modules. When the second visual alignment module detects that there is a certain deviation between the position and the angle of the first workpiece 11 and the second workpiece 12, the compensation mechanism 74 is required to make a fine adjustment on the position and the angle of the second workpiece 12 to compensate the deviation when the two workpieces are butted together.

The compensation mechanism 74 is arranged on the bearing plate 73c and comprises a movement compensation component of an X-Y axis and an angle compensation component rotating around a Z axis; the second lifting mechanism 75 is disposed at the movable end of the compensating mechanism 74, a table guiding cylinder is preferably disposed on the second lifting mechanism 75, a cylinder body of the table guiding cylinder is disposed at the movable end of the compensating mechanism 74, a butt joint block 75b is disposed on a push rod of the table guiding cylinder, and a butt joint sinking groove 23c is correspondingly disposed at the bottom of the tray 23. After the second workpiece 12 and the second mounting bracket 22 are detached from the pallet 23, the compensation mechanism 74 can perform fine adjustment on the second workpiece 12 to ensure that the two workpieces are tightly butted.

When the second vision positioning module detects that there is a certain deviation between the position and the angle of the first workpiece 11 and the second workpiece 12, the compensation mechanism 74 needs to perform fine adjustment on the position and the angle of the second workpiece 12 to compensate the deviation when the two are butted.

In some embodiments, two or more dispensing mechanisms 30 may be provided, and the dispensing mechanisms 30 may be arranged side by side in a row and convey the first gripper 20 by the lower conveying assembly 41 such that the first gripper 20 flows through the dispensing mechanisms 30. In addition, the dispensing mechanisms 30 may be disposed on both sides of the conveying assembly 41 and staggered with each other.

A lifting assembly 42 is arranged below each conveying assembly 41, each lifting assembly 42 comprises a vertical plate 42a and a sliding table 42b arranged on the vertical plate 42a in a sliding mode, each conveying assembly 41 is fixedly arranged on the corresponding sliding table 42b, each sliding table 42b is connected with a nut pair on a vertically arranged lead screw, and the lead screw is driven to rotate through a lifting motor 42c to drive the corresponding sliding table 42b to lift. It should be noted that a sensor may be disposed on the transferring assembly 41 to detect the position of the first clamp 20, and when the first clamp 20 reaches the set position and is detected by the sensor, the transferring assembly 41 is stopped for the subsequent lifting operation. Whether the first clamp 20 enters the set position can also be judged through the image information acquired by the first visual positioning module 32.

The limiting mechanism 50 is arranged above the conveying assembly 41, as the first clamp 20 is horizontally conveyed on the conveying assembly 41, when the first clamp 20 ascends to the limiting mechanism 50 along with the conveying assembly 41, the limiting mechanism 50 fixes the first clamp 20 for subsequent gluing, meanwhile, the conveying assembly 41 is driven by the lifting assembly 42 to descend and be separated from the first clamp 20, and then the conveying assembly 41 is in butt joint with the adjacent conveying assembly 41 to convey other first clamps 20, so that the flowing and gluing of other workpieces are prevented when the workpieces are glued, and the working efficiency is improved. In this embodiment, the limiting mechanisms 50 may be air cylinders respectively disposed at two sides of the conveying assembly 41, and push rods of the air cylinders relatively extend to clamp the first clamp 20 for fixation. Or a single-end clamping mode can be adopted, a cylinder is arranged on one side close to the conveying assembly 41, a push rod of the cylinder extends out to be in butt joint with the first clamp 20, a butt joint structure in butt joint with the first clamp 20 is arranged on the push rod, specifically, a pneumatic clamping jaw can be arranged on the push rod to clamp the first clamp 20, and a groove in butt joint with the pneumatic clamping jaw can also be arranged on the first clamp 20 to improve the butt joint precision.

The dispensing mechanism 30 is arranged, so that dispensing can be carried out on the workpiece which is conveyed to the lower part of the dispensing mechanism 30 by the conveying component 41, meanwhile, the fixed lifting component 42 and the limiting mechanism 50 are combined, the first clamp 20 and the workpiece can be lifted and fixed in the space above the conveying component 41, other workpieces and other first clamps 20 are transferred to other dispensing mechanisms 30 from the lower part of the fixed first clamp 20, accumulation of the workpieces and the first clamp 20 is avoided, the workpieces can be continuously supplied to the dispensing mechanism 30, and the dispensing efficiency of the dispensing machine is improved.

In some embodiments, referring to fig. 1 to 12, in order to stably abut the workpiece and the limiting mechanism 50 with the tray 23, two cylinders may be used to push the holding tray 23 to prevent one end of the tray 23 from being suspended. Specifically, the limiting mechanism 50 includes a first limiting component 51 and a second limiting component 52 distributed at two sides of the conveying component 41; the first limiting assembly 51 comprises a first cylinder and a first limiting member 51a arranged on a push rod of the first cylinder; the second limiting assembly 52 comprises a second cylinder and a second limiting member 52a arranged on a push rod of the second cylinder; when the first clamp 20 ascends to a position between the first limiting component 51 and the second limiting component 52, the push rods of the first air cylinder and the second air cylinder are respectively pushed out to clamp and/or support the tray 23. The tray 23 may be held by two stoppers, or may be held by two stoppers.

In some embodiments, referring to fig. 1 to 12, when the tray 23 is in a transfer process, the position where the tray 23 stays is deviated by a large amount, or the limiting member only receives the tray 23, the tray 23 and the workpiece still cannot be locked, so that a certain structural design needs to be performed on two abutting members and the abutting portion of the tray 23 to ensure that the tray 23 can be completely locked. Specifically, a first butt-joint element 24 may be disposed at one end of the tray 23 close to the first limiting assembly 51, a butt-joint groove is configured between the first butt-joint element 24 and the tray 23, and the first limiting element 51a is inserted into the butt-joint groove to limit the offset of the tray 23 in the vertical direction. A second butt-joint piece 25 may be further disposed at one end of the tray 23 close to the second limiting component 52, a butt-joint hole is disposed on the second butt-joint piece 25, and a bolt adapted to the butt-joint hole is disposed on the second limiting component 52 a. When the pins are inserted into the mating holes, the tray 23 is fully locked.

In some embodiments, referring to fig. 1 to 12, in order to ensure the accuracy of the visual positioning, the workpiece and the first clamp 20 should be located right below the first visual positioning module 32 to reduce the positioning error caused by lens distortion, so before the first clamp 20 and the workpiece are lifted, the first clamp 20 is lifted to stay at the area set by the conveying assembly 41, and two limiting assemblies may be provided to position the tray 23.

Specifically, display screen automatic assembly produces line still includes a positioning mechanism, a positioning mechanism includes first sensor 61 and first locking Assembly 62. A first sensor 61 is fixedly disposed on the transport mechanism for detecting the position of the tray 23. The first locking assembly 62 includes a first drive member fixedly disposed on the transport mechanism and a first stop member driven by the first drive member for interfacing with the tray 23. In this embodiment, the first driving member may be an air cylinder or an electromagnetic lock, the stopping member is a bolt disposed at a push rod end of the air cylinder or on the electromagnetic lock, a proximity switch or a photoelectric switch corresponding to the first sensor 61 is provided on the lower surface of the tray 23, a blind hole for docking with the first sensor 61 and a lock hole for docking with the first stopping member are provided, and when the first sensor 61 senses the blind hole, the first stopping member extends out to dock with the lock hole, so as to lock the tray 23.

In some embodiments, referring to fig. 1-12, if the locking is performed by means of one sensor and the first locking assembly 62 alone, as described above, the first stopper overcomes the greater inertia when locking the tray 23 due to the faster transfer speed, thereby affecting the life of the first locking assembly 62. Two locking assemblies may be provided in this embodiment to lock the tray 23. The two locking assemblies lock in a slightly different manner. Therefore, some modification of the bottom of the tray 23 is required. Specifically, a groove 23a may be provided at the bottom of the tray 23, an extending direction of the groove 23a is parallel to a conveying direction of the conveying assembly 41, and a docking protrusion 23e is further provided in the groove 23 a.

In the present embodiment, referring to fig. 1 to 12, the second locking assembly 63 includes a second driving member fixedly disposed on the conveying assembly 41, and a second stopper driven by the second driving member for abutting against the tray 23. Referring to fig. 5, the second locking assembly 63 is configured to form a switch, and the second driving member includes a mounting housing and a spring disposed in the mounting housing, and the second stopper has one end hinged to the mounting housing and the other end abutting against the spring. During the conveying process of the tray 23, the second stopping piece moves relative to the groove 23a, the hinged end of the second stopping piece is firstly contacted with one side of the butting protrusion 23e, then the tray 23 continues to move the butting protrusion 23e to press down the other end of the second stopping piece, and when the other end of the second stopping piece moves to the other side of the butting protrusion 23e, the spring bounces the second stopping piece and is butted with the other side of the butting protrusion 23e, so that the one-side limiting is realized. Further, after the first sensor 61 detects that the tray 23 enters the set position, the first stopper on the side of the second locking member 63 is driven by the first driving member to extend into the groove 23a and abut against the side of the abutting projection 23e away from the second stopper. Whereby the first and second stoppers can grip the abutment projection 23e to lock the tray 23. It should be noted that the second locking assembly 63 may also be a travel switch that, when the second stop is depressed, sends an identification signal to the PLC of the dispenser, while the PLC controls the braking or deceleration of the transfer assembly 41 to reduce the inertia that the first locking assembly 62 needs to overcome when locking the tray 23.

In some embodiments, referring to fig. 1 to 12, the bottom of the tray 23 is further provided with a first detection hole 23g respectively below the first mounting frame 21 and a second detection hole 23f below the second mounting frame 22, and the limiting mechanism 50 further includes a third sensor and a fourth sensor fixedly disposed on the conveying assembly 41. Whether the workpieces are placed on the two mounting frames or not can be detected by arranging the third sensor and the fourth sensor, when the third sensor and/or the fourth sensor do not detect the workpieces, the corresponding glue dispensing mechanism 30 stops follow-up operation, and the PLC gives an alarm to remind a user of checking.

In some embodiments, referring to fig. 1 to 12, the automatic assembling device comprises the above-mentioned automatic assembling line for display screens. In order to further improve the automation level of the automatic assembling device, the conveying mechanism may be composed of a plurality of conveying assemblies 41, and each conveying assembly 41 is connected end to form a circulating line body on which the first clamp 20 flows in a circulating manner. The circulating line body comprises a feeding part and a discharging part, the first workpiece 11 and the second workpiece 12 are loaded onto the first fixture 20 from the feeding part and then sequentially pass through the glue dispensing mechanism 30 and the second manipulator 71 to finish gluing and assembling the first workpiece 11 and the second workpiece 12, and after the assembling is finished, the first fixture 20 flows to the discharging part for discharging.

Specifically, referring to fig. 11, the circulating line body includes a conveying line body and a circulating line body arranged side by side, the conveying directions of the conveying line body and the circulating line body are opposite, and the second robot 71 and the dispensing mechanism 30 are adapted to the conveying line body. The adjacent two ends of the conveying line body and the return line body are butted through a conveying assembly 41, and meanwhile, a turning and conveying assembly 90 with the conveying direction vertical to the conveying direction of the conveying line body and the return line body is arranged at the end parts of the conveying line body and the return line body. The steering transmission assembly 90 is disposed inside the conveyor and return bodies, and is disposed proximate to both ends. The lifting mechanism comprises a base plate 91, a guide post 92 penetrating through the base plate 91, a first frame body 93 arranged at the upper end of the guide post 92, a second frame body 94 arranged at the lower end of the guide post 92, a lifting cylinder 95 connecting the base plate 91 and the first frame body 93, conveying wheels arranged at two ends of the first frame body 93 and the second frame body 94, a conveying belt 96 wound on the conveying wheels and a motor driving the conveying wheels to rotate. The first frame body 93 is a flat plate which is positioned inside the conveyor belt 96, and the inner surface of the upper section of the conveyor belt 96 keeps a certain distance from the upper surface of the flat plate, so that the conveyor belt 96 and the first frame body 93 play a role of receiving the tray 23. The conveying direction of the first conveyor belt 96 is perpendicular to the conveying direction of the conveyor line body and the return line body. The conveyor belt 96 is located below the synchronous belt 41b of the conveyor line body and the return line body in a normal state, when the tray 23 runs above the steering transmission assembly 90, the lifting cylinder 95 lifts the conveyor belt 96 and the first frame body 93, so that the tray 23 is separated from the synchronous belt 41b of the conveyor line body and the return line body, the conveyor belt 96 is turned to transmit the conveying assembly 41 between the conveyor line body and the return line body to be in butt joint, and then the conveying assembly 41 transmits the conveying assembly 41 to the steering transmission assembly 90 on the other side, so that transmission along the direction perpendicular to the conveyor line body and the return line body is completed. The circulating flow of the first clamp 20 is realized by arranging the self-circulating line body, and the transfer efficiency is improved.

The above description is only a part of or preferred embodiments of the present invention, and neither the text nor the drawings should be construed as limiting the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings or directly/indirectly applied to other related technical fields in the spirit of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides a display screen automatic assembly line for assemble second work piece and first work piece, its characterized in that includes:

2. The automatic assembly line of display screens of claim 1, wherein the first clamp comprises:

a tray;

the second mounting rack comprises a plurality of supporting columns and a plurality of limiting columns, the supporting columns are arranged on the tray and located on one side of the first mounting rack, the supporting columns are used for supporting the second workpiece, and the limiting columns surround the periphery of the second workpiece.

3. The automatic assembly line of display screens of claim 1, wherein the automatic assembly device further comprises:

the second lifting mechanism is used for lifting the second workpiece and the second mounting frame to separate from the tray;

and the second visual positioning module is used for positioning the first workpiece and/or the second workpiece.

4. The automatic assembly line of display screens of claim 3, wherein the automatic assembly device further comprises:

5. The automatic assembly line of display screens of any one of claims 1 to 4, wherein the conveying mechanism further comprises a lifting assembly for driving the conveying assembly to lift;

6. The automatic assembly production line of display screens of claim 5, wherein the limiting mechanism comprises a first limiting component and a second limiting component which are distributed on two sides of the conveying component;

the second limiting component comprises a second air cylinder and a second limiting piece arranged on a push rod of the second air cylinder;

7. The automatic display screen assembling production line of claim 6, wherein a first butt joint piece is arranged at one end, close to the first limiting assembly, of the tray, a butt joint groove is formed between the first butt joint piece and the tray, and the first limiting piece is inserted into the butt joint groove;

8. The automatic assembly production line of display screens of claim 7, further comprising a first positioning mechanism corresponding to the glue dispensing mechanism, the first positioning mechanism comprising:

and the first locking component comprises a first driving piece fixedly arranged on the conveying mechanism and a first stop piece driven by the first driving piece and used for butting with the tray.

9. The automatic display screen assembly production line of claim 5, wherein a groove is further formed in the bottom of the tray, the extending direction of the groove is parallel to the conveying direction of the conveying assembly, and a butt joint protrusion is further arranged in the groove;

the first positioning mechanism further comprises a second locking assembly, the second locking assembly further comprises a second driving piece fixedly arranged on the conveying assembly and a second stopping piece driven by the second driving piece and used for being in butt joint with the tray, and the first stopping piece and the second stopping piece clamp the butt joint protrusion to lock the tray.

10. The automatic assembly line of display screens of claim 1, wherein the conveying mechanism comprises a plurality of conveying assemblies, and the conveying assemblies are connected end to end in sequence to form a circulating line.