Automatic rear cover assembling machine

The automatic assembly of the Type-C body and the dust cover is achieved through the automatic assembly back cover machine, which solves the problem of time-consuming and labor-intensive manual assembly, improves production efficiency and assembly stability, and adapts to different models of Type-C bodies.

CN223418782UActive Publication Date: 2025-10-10DONGGUAN JBL TECH CO LTD
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Patent Information

Application Number
CN202422678536.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-04
Publication Date
2025-10-10
Estimated Expiration
2034-11-04

AI Technical Summary

Technical Problem

The existing Type-C body and back cover assembly requires manual operation, which is time-consuming and labor-intensive and can easily damage the device. In addition, the Type-C body is difficult to fix during the plug-in process.

Method used

An automatic back cover assembly machine was designed, including a Type-C body feeding tray, a dust cover feeding tray, a loading station, a back shell insertion device, a CDC detection station and an unloading station. The automatic assembly and inspection of the Type-C body and the dust cover were realized by using a handling robot, a cylinder power and a clamping device.

Benefits of technology

The automated assembly of the Type-C body and the dust cover is realized, saving labor costs, improving production efficiency, ensuring assembly stability and flexibility, and adapting to Type-C bodies of different sizes.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an automatic rear cover assembling machine, which belongs to the technical field of assembling, and comprises an operation table, a Type-C body feeding disc is arranged at the top of the operation table, the Type-C body feeding disc is located at the edge position of the operation table, two dustproof cover feeding discs are arranged at the top of the operation table, a feeding station is arranged at the top of the operation table, and a feeding station is arranged at the bottom of the operation table. The top of the operation table is provided with a rear shell inserting device, the top of the operation table is sequentially provided with a CDC detection station, a discharging station and a discharging station, the top of the operation table is provided with a carrying mechanical arm, and the rear shell inserting device comprises a base. According to the utility model, a large amount of labor cost is saved, automatic production is realized, the production efficiency is greatly improved, the practicability of the device is improved, stable clamping of the Type-C body is realized, the stability in the plugging process is realized, the plugging efficiency and stability are improved, the incorrect direction of the Type-C body can be prevented, the direction can be quickly adjusted, and the plugging efficiency is improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of assembly, in particular to an automatic assembly rear cover machine. BACKGROUND

[0002] The Type-C rear cover machine is an automatic equipment, mainly used for the assembly of Type-C interface. This equipment usually uses a cylinder as power, and the control system is a PLC programmable controller, which can intuitively perform station-type assembly work. The equipment realizes efficient and accurate assembly and packaging process through an automatic feeding system and laser coding technology. When a fault occurs, the equipment will automatically stop, alarm and display error information, facilitating quick troubleshooting and problem solving.

[0003] The existing Type-C body and rear cover assembly often needs to be manually performed. This way not only consumes time and effort, but also easily causes damage to the equipment. During the plugging process, the surface of the Type-C body is relatively smooth, so a fixing device is needed to fix the Type-C body. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an automatic assembly rear cover machine to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an automatic assembly rear cover machine, comprising an operation table, the top of the operation table is provided with a Type-C body feeding disc, the Type-C body feeding disc is located at the edge of the operation table, the top of the operation table is provided with two dust cover feeding discs, the top of the operation table is provided with a feeding station, the top of the operation table is provided with a rear shell plugging device, the top of the operation table is sequentially provided with a CDC detection station, a discharge station and a discharging station, the top of the operation table is provided with a carrying manipulator, the rear shell plugging device comprises a base, the inside of the base is provided with a rotating mechanism, the top of the base is provided with a mounting plate, the front end face of the mounting plate is rotatably provided with a rotating plate, the upper surface of the mounting plate is symmetrically provided with a limiting groove, a lifting mechanism is arranged between the two limiting grooves, a limiting rod is movably arranged in the limiting groove, and the upper end of the limiting rod extends to the outside of the limiting groove, the top of the limiting rod is fixedly connected with a lifting plate, the upper surface of the lifting plate is provided with a sliding groove, the inner wall of the sliding groove is slidably connected with a sliding block, the top of the sliding block is fixedly connected with a second clamping plate, one side of the second clamping plate is fixedly provided with a vertical plate, a hydraulic cylinder is installed through the surface of the vertical plate, and the output end of the hydraulic cylinder is fixedly connected with the outer wall of the second clamping plate close to the second clamping plate, the other side of the second clamping plate is fixedly provided with a first clamping plate.

[0006] As a further solution of the present invention: the lifting mechanism includes a worm, and the front end of the worm is fixedly connected to the rear end of the rotating plate, the top of the worm is transmission-connected to a worm wheel, and the inside of the worm wheel is fixedly connected to a bidirectional screw.

[0007] As a further solution of the present invention: the outer wall of the bidirectional screw is threadedly connected to a moving block, an L-shaped rod is provided through the lower end surface of the moving block, and the L-shaped rod is movably connected to the moving block, and the top of the moving block is fixedly connected to a first hinge block.

[0008] As a further solution of the present invention: the top of the first hinge block is hinged with a movable rod, the top of the movable rod is hinged with a second hinge block, and the top of the second hinge block is fixedly connected to the bottom of the lifting plate.

[0009] As a further solution of the present invention: the rotating mechanism includes a rotating plate, and the rotating plate is rotatably arranged on the outside of the base, one side of the rotating plate is fixedly connected to a rotating rod, and one end of the rotating rod extends to the inside of the base, and a first conical disk is fixedly sleeved on the outer wall of one end of the rotating rod.

[0010] As a further solution of the present invention: the bottom of the first conical disk is meshedly connected to the second conical disk, the interior of the second conical disk is fixedly connected to a rotating column, and the top of the rotating column is fixedly connected to the bottom of the mounting plate, connecting rods are provided on both sides of the rotating column, and the top of the connecting rod is fixedly connected to the bottom of the mounting plate, an annular groove is provided at the bottom of the connecting rod, and an annular slider is slidably connected to the inner wall of the annular groove, and the top of the annular slider is fixedly connected to the bottom of the connecting rod.

[0011] The utility model has the following beneficial effects:

[0012] (1) Through this device, the Type-C body is first fed into the conveying mechanism through the Type-C body feeding tray, and then the Type-C body reaches the loading station. Then the dust cover feeding tray also feeds the dust cover into the loading station, and is transported to the plug-in rear shell device by the transporting robot for fixed automatic plug-in. The Type-C body and the dust cover are assembled together using the power of the cylinder. Then the transporting robot feeds the assembled parts into the conveyor belt, and the parts are inspected by the CDC inspection station. If the inspection is qualified, they are collected by the unloading station. If they are unqualified, they are discharged by the discharge station. The above-mentioned automated assembly device saves a lot of labor costs, realizes automated production, greatly improves production efficiency, and improves the practicality of the device.

[0013] (2) Through the structural design of the lifting plate, rotating plate, limiting groove, limiting rod and lifting mechanism, the height of the clamped Type-C body can be easily adjusted, thereby improving the use effect of the device. When the lifting plate moves, it will drive the limiting rod to move in the limiting groove, which can improve the stability of the lifting plate when moving. This solves the problem that when the Type-C body is clamped, the height of the Type-C body cannot be adjusted, and the height of the Type-C body cannot be adjusted according to actual conditions, resulting in poor use effect. At the same time, it can achieve stable clamping of the Type-C body, achieve stability during the plugging process, and improve plugging efficiency and stability.

[0014] (3) Through the structural design of the rotating mechanism, the horizontal direction of the automatic assembly back cover machine can be adjusted easily, so as to be more convenient for users to use. When the mounting plate rotates, the connecting block drives the annular slider to slide in the annular slide groove, which can improve the stability of the mounting plate during rotation, improve the flexibility of the device, increase the plug-in speed, and adapt to Type-C bodies of different sizes, thereby improving the flexibility and applicability of the device. At the same time, it can prevent the Type-C body from being in the wrong direction, quickly adjust the direction, and improve the plug-in efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial three-dimensional schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the plug-in rear shell device of the utility model;

[0017] Figure 3 This is a schematic diagram of the main internal structure of the present invention;

[0018] Figure 4 This is an enlarged partial structural diagram of point A of the present invention;

[0019] Figure 5 This is a schematic diagram of the enlarged partial structure of point B of the present invention.

[0020] In the figure: 1. Type-C body feeding tray; 2. Dust cover feeding tray; 3. Loading station; 4. Inserting rear shell device; 401. Sliding block; 402. Sliding groove; 403. First clamping plate; 404. Lifting plate; 405. Mounting plate; 406. Second clamping plate; 407. Hydraulic cylinder; 408. Vertical plate; 409. Rotating plate; 410. Base; 411. Limiting groove; 412. Limiting rod; 5. CDC detection station; 6. Discharge station; 7. Unloading station; 8. , lifting mechanism; 801, first hinge block; 802, bidirectional screw; 803, worm gear; 804, worm; 805, second hinge block; 806, movable rod; 807, L-shaped rod; 808, moving block; 9, rotating mechanism; 901, rotating column; 902, first conical disk; 903, second conical disk; 904, connecting rod; 905, annular slider; 906, annular slide groove; 907, rotating plate; 908, rotating rod; 10, operating table; 11, handling robot. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate and simplify the description of the utility model and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] See also Figure 1-4 , the utility model provides an embodiment: an automatic back cover assembly machine, including an operating table 10, a Type-C body feeding tray 1 is provided on the top of the operating table 10, the Type-C body feeding tray 1 is located at the edge of the operating table 10, two dust cover feeding trays 2 are provided on the top of the operating table 10, a loading station 3 is provided on the top of the operating table 10, a back shell insertion device 4 is provided on the top of the operating table 10, a CDC detection station 5, a discharge station 6 and a unloading station 7 are provided on the top of the operating table 10 in sequence, a handling robot 11 is provided on the top of the operating table 10, the back shell insertion device 4 includes a base 410, a rotating mechanism 9 is provided inside the base 410, a mounting plate 405 is provided on the top of the base 410, and a rotating plate 409 is provided on the front end surface of the mounting plate 405 for rotation. Limiting grooves 411 are symmetrically provided on the upper surface of the plate 405, and a lifting mechanism 8 is provided between the two limiting grooves 411. A limiting rod 412 is movably provided inside the limiting groove 411, and the upper end of the limiting rod 412 extends to the outside of the limiting groove 411. The top of the limiting rod 412 is fixedly connected to the lifting plate 404, and a sliding groove 402 is provided on the upper surface of the lifting plate 404. The inner wall of the sliding groove 402 is slidably connected to the sliding block 401, and the top of the sliding block 401 is fixedly connected to the second clamping plate 406. A vertical plate 408 is fixedly provided on one side of the second clamping plate 406. A hydraulic cylinder 407 is installed on the surface of the vertical plate 408, and the output end of the hydraulic cylinder 407 is fixedly connected to the outer wall of the second clamping plate 406. The other side of the second clamping plate 406 is fixedly provided with the first clamping plate 403;

[0027] Specifically, such as Figure 1 、 Figure 2 and Figure 4As shown, when in use, when the horizontal direction of the automatic rear cover assembly machine needs to be adjusted, the rotating plate 907 can be rotated, and the rotating plate 907 rotates through the rotating rod 908 to drive the first conical disk 902 to rotate, and the first conical disk 902 rotates through the second conical disk 903 to drive the rotating column 901 to rotate, and the rotating column 901 rotates to drive the mounting plate 405 to rotate, and the mounting plate 405 rotates to drive the lifting plate 404 to rotate, and the lifting plate 404 rotates to drive the guide seat tube to rotate, thereby achieving the effect of quickly adjusting the horizontal direction of the automatic rear cover assembly machine, and when the mounting plate 405 rotates, it will drive the annular slider 905 to slide in the annular slide groove 906 through the connecting rod 904, which can improve the stability of the mounting plate 405 when rotating.

[0028] A mounting plate 405 is provided on the top of the base 410, and a rotating plate 409 is rotatably provided on the front end surface of the mounting plate 405. A limiting groove 13 is symmetrically provided on the upper surface of the mounting plate 405, and a lifting mechanism 8 is provided between the two limiting grooves 13. The lifting mechanism 8 includes a worm 804, and the front end of the worm 804 is fixedly connected to the rear end of the rotating plate 409, and the top of the worm 804 is connected to the worm wheel 803 in a transmission manner. The inside of the worm wheel 803 is fixedly connected to the bidirectional screw 802, and the outer wall of the bidirectional screw 802 is threadedly connected to the moving block 808. The lower end surface of the moving block 808 is penetrated by an L-shaped rod 807, and the L-shaped rod 807 is movably connected to the moving block 808. The top of the moving block 808 is fixedly connected to the first hinge block 801, and the top of the first hinge block 801 is hinged. There is a movable rod 806, the top of the movable rod 806 is hinged with a second hinge block 805, and the top of the second hinge block 805 is fixedly connected to the bottom of the lifting plate 404, the inner movability of the limit slot 13 is provided with a limit rod 14, and the upper end of the limit rod 14 extends to the outside of the limit slot 13, the top of the limit rod 14 is fixedly connected to the lifting plate 404, the upper surface of the lifting plate 404 is provided with a sliding groove 2, the inner wall of the sliding groove 2 is slidably connected with a sliding block 1, the top of the sliding block 1 is fixedly connected to the second clamping plate 6, one side of the second clamping plate 6 is fixedly provided with a vertical plate 10, the surface of the vertical plate 10 is penetrated by a hydraulic cylinder 7, and the output end of the hydraulic cylinder 7 is fixedly connected to the outer wall close to the second clamping plate 6, and the other side of the second clamping plate 6 is fixedly provided with a first clamping plate 3;

[0029] Specifically, such as Figure 1 、 Figure 2 and Figure 3As shown, when the Type-C body is clamped, the height of the automatic rear cover assembling machine needs to be adjusted, the rotating plate 409 is rotated, the rotating plate 409 drives the worm 804 to rotate, the worm 804 rotates through the worm gear 803 to drive the bidirectional screw 802 to rotate, the bidirectional screw 802 drives the two moving blocks 808 to move in the direction of moving away from each other or moving close to each other, the two moving blocks 808 drive the two first hinged blocks 801 to move, the two first hinged blocks 801 move through the cooperation of the movable rod 806 and the second hinged block 805, drive the lifting plate 404 to move upward or downward, the lifting plate 404 moves upward or downward drives the automatic rear cover assembling machine to move upward or downward, so as to achieve the effect of conveniently adjusting the height of the clamped Type-C body, and the lifting plate 404 moves while driving the limiting rod 14 to move in the limiting groove 13, which can improve the stability of the lifting plate 404 when moving, solve the problem that when the Type-C body is clamped, the height of the automatic rear cover assembling machine cannot be adjusted, the height of the automatic rear cover assembling machine cannot be adjusted according to the actual situation, and the use effect is poor.

[0030] By setting the sliding block 1, the sliding groove 2, the first clamping plate 3, the second clamping plate 6 and the hydraulic cylinder 7, the Type-C body can be quickly clamped and fixed.

[0031] Working principle: First, the Type-C body is fed into the conveying mechanism through the Type-C body feeding tray 1, and then the Type-C body reaches the loading station 3. Then the dust cover feeding tray 2 also feeds the dust cover into the loading station 3, and is transported to the plug-in rear shell device 4 by the handling robot 11 for fixed automatic plug-in. The Type-C body and the dust cover are assembled together using the cylinder power. Then the handling robot 11 feeds the assembled parts into the conveyor belt and passes the CDC detection station 5 for inspection. If the inspection is qualified, it is collected by the unloading station 7. If it is unqualified, it is discharged by the discharge station 6. The above automation assembly The device saves a lot of labor costs, realizes automated production, greatly improves production efficiency, and improves the practicality of the device. During the assembly process, the Type-C body is first placed on the lifting plate 404, and the Type-C body is attached to the inner wall of the first clamping plate 3. Then, the output end of the hydraulic cylinder 7 can be used to drive the second clamping plate 6 to move toward the first clamping plate 3 until it contacts the Type-C body. Through the mutual cooperation of the first clamping plate 3 and the second clamping plate 6, the Type-C body is clamped, and then the Type-C body is cut. Secondly, when the height of the automatic assembly back cover machine needs to be adjusted When the rotating plate 409 is rotated, the rotating plate 409 drives the worm 804 to rotate, the worm 804 rotates through the worm gear 803 to rotate the bidirectional screw 802, and the bidirectional screw 802 drives the two moving blocks 808 to move in the direction of moving away from or approaching each other, and the two moving blocks 808 move to drive the two first hinge blocks 801 to move, and the two first hinge blocks 801 move through the mutual cooperation of the movable rod 806 and the second hinge block 805 to drive the lifting plate 404 to move upward or downward, and the lifting plate 404 moves upward or downward to drive the Type-C body to move upward or downward, so as to facilitate the clamping of the Ty The height adjustment effect of the pe-C body is convenient for adjusting the angle alignment. Finally, when the horizontal direction of the Type-C body needs to be adjusted, the rotating plate 907 can be rotated. The rotating plate 907 rotates through the rotating rod 908 to drive the first conical disk 902 to rotate. The first conical disk 902 rotates through the second conical disk 903 to drive the rotating column 901 to rotate. The rotating column 901 rotates to drive the mounting plate 405 to rotate. The mounting plate 405 rotates to drive the lifting plate 404 to rotate. The lifting plate 404 rotates to drive the guide seat tube to rotate, thereby achieving the effect of quickly adjusting the horizontal direction of the Type-C body to avoid the incorrect direction affecting the insertion efficiency.

[0032] The standard parts used in this application document can all be purchased on the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. At the same time, the electrical components appearing in this application are all externally connected to the power supply and control switch when in use. The control method is automatic control through the controller. The control circuit of the controller can be implemented by simple programming by technical personnel in this field, which is common knowledge in this field. Therefore, this utility model no longer explains the control method and circuit connection in detail, and the peripheral controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the peripheral controller is a conventional known device.

[0033] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of the present utility model.

Claims

1. An automatic back cover assembly machine, comprising an operating table (10), characterized in that: The top of the operating table (10) is provided with a Type-C body feeding tray (1), which is located at the edge of the operating table (10), the top of the operating table (10) is provided with two dust cover feeding trays (2), the top of the operating table (10) is provided with a loading station (3), the top of the operating table (10) is provided with a plug-in rear shell device (4), the top of the operating table (10) is provided with a CDC detection station (5) in sequence. ), a discharge station (6) and a blanking station (7), a handling robot (11) is provided on the top of the operating table (10), the plug-in rear shell device (4) includes a base (410), a rotating mechanism (9) is provided inside the base (410), a mounting plate (405) is provided on the top of the base (410), a rotating plate (409) is provided on the front end surface of the mounting plate (405), and a limiting groove is symmetrically provided on the upper surface of the mounting plate (405) (411), a lifting mechanism (8) is provided between the two limiting grooves (411), a limiting rod (412) is movably provided inside the limiting groove (411), and the upper end of the limiting rod (412) extends to the outside of the limiting groove (411), the top of the limiting rod (412) is fixedly connected to a lifting plate (404), the upper surface of the lifting plate (404) is provided with a sliding groove (402), and the inner wall of the sliding groove (402) is slidably connected to a sliding plate (404). The sliding block (401) is fixedly connected to the top of the sliding block (401) with a second clamping plate (406), a vertical plate (408) is fixedly provided on one side of the second clamping plate (406), a hydraulic cylinder (407) is installed through the surface of the vertical plate (408), and the output end of the hydraulic cylinder (407) is fixedly connected to the outer wall of the second clamping plate (406), and the first clamping plate (403) is fixedly provided on the other side of the second clamping plate (406).

2. The automatic back cover assembly machine according to claim 1, characterized in that: The lifting mechanism (8) includes a worm (804), and the front end of the worm (804) is fixedly connected to the rear end of the rotating plate (409), the top of the worm (804) is transmission-connected to a worm wheel (803), and the inside of the worm wheel (803) is fixedly connected to a bidirectional screw (802).

3. The automatic back cover assembly machine according to claim 2, characterized in that: The outer wall of the bidirectional screw (802) is threadedly connected to a moving block (808), the lower end surface of the moving block (808) is penetrated by an L-shaped rod (807), and the L-shaped rod (807) is movably connected to the moving block (808), and the top of the moving block (808) is fixedly connected to the first hinge block (801).

4. The automatic back cover assembly machine according to claim 3, characterized in that: The top of the first hinge block (801) is hinged with a movable rod (806), the top of the movable rod (806) is hinged with a second hinge block (805), and the top of the second hinge block (805) is fixedly connected to the bottom of the lifting plate (404).

5. The automatic back cover assembly machine according to claim 1, characterized in that: The rotating mechanism (9) includes a rotating plate (907), and the rotating plate (907) is rotatably arranged outside the base (410). A rotating rod (908) is fixedly connected to one side of the rotating plate (907), and one end of the rotating rod (908) extends to the inside of the base (410). A first conical disk (902) is fixedly sleeved on the outer wall of one end of the rotating rod (908).

6. The automatic back cover assembly machine according to claim 5, characterized in that: The bottom of the first conical disk (902) is meshedly connected to the second conical disk (903), the interior of the second conical disk (903) is fixedly connected to a rotating column (901), and the top of the rotating column (901) is fixedly connected to the bottom of the mounting plate (405).

7. The automatic back cover assembly machine according to claim 6, characterized in that: Connecting rods (904) are provided on both sides of the rotating column (901), and the top of the connecting rod (904) is fixedly connected to the bottom of the mounting plate (405), and an annular sliding groove (906) is provided at the bottom of the connecting rod (904), and an annular slider (905) is slidably connected to the inner wall of the annular sliding groove (906), and the top of the annular slider (905) is fixedly connected to the bottom of the connecting rod (904).