Electronic component placement machine for packaging central processing unit

Abstract

The invention relates to the technical field of electronic component mounting, in particular to an electronic component mounting machine for packaging a central processing unit, which comprises a base, a suction pen and an annular fixing seat, the suction pen is mounted on the upper side of the base through a bracket and a connecting rod, and the outer end of a positioning slide block is slidably connected with an annular slide rail; a second driving gear is fixedly installed at the lower end of the second driving motor through an output shaft of the second driving motor and is in meshed connection with the second positioning gear ring, a movable seat is inserted into the inner side of the positioning seat, and a positioning clamping jaw is slidably installed at the upper end of the positioning table. According to the invention, the positioning slide blocks are arranged, and the positioning seats can be mounted and dismounted through the sliding connection between the positioning slide blocks and the annular slide rail, so that the number of the positioning seats can be adjusted according to the appearance of a circuit board substrate, the movement direction of the positioning seats can be limited, and the positioning seats can be conveniently positioned through the meshing connection between a second driving gear and a second positioning gear ring. The position of the positioning seat can be adjusted, and the positioning effect on the circuit board substrate is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic component mounting technology, and more particularly to an electronic component mounting machine for central processing unit (CPU) packaging. Background Technology

[0002] Electronic component placement machines used for central processing unit (CPU) packaging, also known as placement machines or surface mount systems, are key pieces of equipment in the production line following the dispensing or screen printing processes. They use a pick-and-place pen to precisely place various micro-components onto designated locations on the substrate. A typical structure includes a base, a worktable, and a multi-directional slide rail system. Precise positioning is achieved by controlling the movement of the pick-and-place pen in the left-right, forward-backward, and up-down directions, thus meeting the packaging requirements of precision components such as CPUs.

[0003] However, in the design of some existing pick-and-place machines of this type, the slide rails are still secured using multiple manual locking components. Each time the pen position is adjusted, the operator needs to tighten these components one by one, a cumbersome and inefficient process. This not only increases the complexity and workload of daily operations but also introduces the risk of errors caused by manual operation in high-frequency, high-precision placement processes such as CPU packaging. Therefore, while maintaining the original high placement accuracy of the equipment, effectively simplifying the locking process and improving operational convenience has become a crucial area for technical optimization for these pick-and-place machines used in CPU packaging when targeting high-end electronic manufacturing applications.

[0004] The prior art patent document with publication number CN222602700U provides an electronic component mounting device; the device moves the clamping plate inward by turning the threaded rod, thereby fixing the substrate inside the fixing base, avoiding the substrate from shaking or shifting during the mounting process, and improving the stability of the mounting process. The magnetic strip at the bottom of the fixing base can be used to adsorb the entire clamping assembly onto the surface of the base, making it easy to adjust the position of the clamping assembly on the base, and has a high degree of flexibility.

[0005] However, the device still has the following problems: its positioning mechanism is mainly designed for standard square substrates, using relatively moving clamps to linearly hold the substrates from the edges. This design is not adaptable enough to circular, irregular polygonal, or substrates of different sizes, which may lead to unstable clamping, uneven force, or even damage to the edges of the substrates. Therefore, its application range is limited and it is difficult to meet the flexible requirements of the diversified production of modern electronic products. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the background art, and to propose an electronic component mounting machine for central processing unit packaging.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: an electronic component mounting machine for central processing unit packaging, comprising a base, a suction pen, and an annular fixing seat. The suction pen is mounted on the upper side of the base via a bracket and a connecting rod. The annular fixing seat is fixedly mounted on the upper middle part of the base. An annular slide rail is provided inside the annular fixing seat. A second positioning toothed ring is fixedly mounted on the periphery of the annular fixing seat. Multiple positioning seats are provided inside the annular fixing seat. A first drive motor and a second drive motor are fixedly mounted on the upper end of the positioning seats. A positioning slider is fixedly mounted on the lower end of the first drive motor via its output shaft. The outer end of the positioning slider is slidably connected to the annular slide rail. A second drive gear is fixedly mounted on the lower end of the second drive motor via its output shaft. The second drive gear meshes with the second positioning toothed ring. A movable seat is inserted into the inner side of the positioning seat. A positioning platform is fixedly mounted on the inner side of the movable seat. A positioning claw is slidably mounted on the upper end of the positioning platform.

[0008] In the above-mentioned electronic component mounting machine for central processing unit packaging, a cavity is provided on one side of the positioning seat, the positioning slider is rotatably installed in the cavity, and the periphery of the positioning slider is cam-shaped.

[0009] In the above-mentioned electronic component mounting machine for central processing unit packaging, the upper end of the positioning seat is provided with a first sliding cavity, the upper end of the movable seat is provided with a second sliding cavity, the positions of the first sliding cavity and the second sliding cavity correspond to each other, and a third drive motor is fixedly installed on the upper end of the positioning seat.

[0010] In the above-mentioned electronic component mounting machine for central processing unit packaging, a third rack is fixedly installed in the second sliding cavity, and a third drive gear is fixedly installed on the lower side of the third drive motor through its output shaft. The third drive motor and the third drive gear are respectively located on the upper and lower sides of the first sliding cavity, and the third drive gear is meshed with the third rack.

[0011] In the above-mentioned electronic component mounting machine for central processing unit packaging, a fourth limiting groove A is provided on the upper end of the positioning platform, a rotating disk is rotatably installed inside the positioning platform, and a fourth limiting groove B is provided on the upper end of the rotating disk. The number and position of the positioning claws correspond one-to-one with the fourth limiting groove A and the fourth limiting groove B.

[0012] In the above-mentioned electronic component mounting machine for central processing unit packaging, the lower end of the positioning claw is fixedly installed with a fourth limiting slider A that is slidably connected to the fourth limiting groove A, and the lower end of the fourth limiting slider A is fixedly installed with a fourth limiting slider B that is slidably connected to the fourth limiting groove B.

[0013] In the above-mentioned electronic component mounting machine for central processing unit packaging, a connecting rod is rotatably installed in the positioning seat, and a connecting sleeve is rotatably installed in the movable seat. The connecting rod and the connecting sleeve are connected to each other by insertion.

[0014] In the above-mentioned electronic component mounting machine for central processing unit packaging, a fourth drive motor is fixedly installed on the upper side of the positioning seat, a first bevel gear is fixedly installed on the lower side of the fourth drive motor through its output shaft, a second bevel gear that meshes with the first bevel gear is fixedly installed on the outer end of the connecting rod, a third bevel gear is fixedly installed on the lower end of the rotating disk, and a fourth bevel gear that meshes with the third bevel gear is fixedly installed on the outer end of the connecting tube.

[0015] In the above-mentioned electronic component mounting machine for central processing unit packaging, the base has a through cavity, the bracket is U-shaped and is slidably installed in the through cavity, and a first adjusting motor is fixedly installed on the outer wall of the base. The outer end of the first adjusting motor is fixedly installed with a first threaded rod that is slidably connected to the bracket through its output shaft.

[0016] In the above-mentioned electronic component mounting machine for central processing unit packaging, a movable plate is provided on the upper side of the bracket, a second threaded sleeve is fixedly installed on the lower side of the movable plate, a second threaded rod that meshes with the second threaded sleeve is rotatably installed on one side of the bracket, a second adjusting motor is fixedly installed on the outer wall of the bracket, and the output shaft of the second adjusting motor is rotatably connected to the second threaded rod through a bevel gear set.

[0017] In the above-mentioned electronic component mounting machine for central processing unit packaging, a movable block is slidably installed on the lower side of the movable plate, a connecting rod is fixedly installed on the lower end of the movable block, a third threaded rod that is threadedly connected to the movable block is rotatably installed on the lower side of the movable plate, a driven insert rod that is rotatably connected to the third threaded rod through a bevel gear set is rotatably installed on the lower side of the movable plate, an active insert that is inserted and connected to the driven insert rod is rotatably installed on the other side of the upper end of the bracket, and a third adjusting motor is fixedly installed on one side of the outer wall of the bracket, and the output shaft of the third adjusting motor is rotatably connected to the active insert through a bevel gear set.

[0018] Compared with existing technologies, the advantages of this electronic component placement machine for central processing unit packaging are: I. The present invention provides a positioning slider, which, through its sliding connection with the annular slide rail, allows for the installation and removal of the positioning seat. This enables the adjustment of the number of positioning seats according to the shape of the circuit board substrate and restricts the movement direction of the positioning seats. Through the meshing connection between the second drive gear and the second positioning gear ring, the position of the positioning seat can be adjusted, thereby improving the positioning effect on the circuit board substrate.

[0019] Second, through the meshing connection between the third drive gear and the third rack, the present invention can drive the movable seat to move within the positioning seat, so that the positioning platform corresponds to the positioning position of the circuit board substrate, ensuring that the device can fix circuit board substrates of various shapes.

[0020] Third, the present invention enables the rotating disk to retract or expand the positioning claw through the sliding connection between the fourth limiting slider B and the fourth limiting groove B and between the fourth limiting slider A and the fourth limiting groove A, so that the rotating disk can drive the positioning claw to retract or expand. When the positioning claw is inserted into the positioning hole of the circuit board substrate, the circuit board substrate can be fixed. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of the base and the annular fixing seat of the present invention; Figure 2 This is a schematic diagram of the external structure of the base and positioning seat of the present invention; Figure 3 This is a schematic diagram of the external structure of the annular fixing base of the present invention; Figure 4 This is a schematic diagram of the external structure of the positioning seat and the movable seat of the present invention; Figure 5 This is a schematic diagram of the internal structure of the positioning seat and the movable seat of the present invention; Figure 6 This is a schematic diagram of the internal structure of the positioning seat of the present invention; Figure 7 This is a schematic diagram of the internal disassembled structure of the positioning seat and the movable seat of the present invention; Figure 8 This is a schematic diagram of the internal disassembled structure of the positioning stage of the present invention; Figure 9 This is a schematic diagram of the internal structure of the connecting rod and connecting sleeve of the present invention; Figure 10 This is a schematic diagram of the internal structure of the bracket of the present invention.

[0022] In the picture: 1. Base; 12. Pen suction cup; 2. Annular fixed seat; 21. Annular slide rail; 22. Second positioning toothed ring; 3. Positioning seat; 31. First drive motor; 32. Cavity; 33. Positioning slider; 34. Second drive motor; 35. Second drive gear; 4. Movable seat; 41. First sliding cavity; 42. Second sliding cavity; 43. Third rack; 44. Third drive motor; 45. Third drive gear; 5. Positioning platform; 51. Fourth limit slide groove A; 52. Fourth limit slider A; 53. Positioning chuck; 54. Rotary disk; 55. Fourth limit slider B; 56. Fourth limit slide groove B 6. Fourth drive motor; 61. Connecting rod; 62. Connecting cylinder; 63. Second bevel gear; 64. First bevel gear; 65. Third bevel gear; 66. Fourth bevel gear; 7. Bracket; 70. Connecting rod; 71. First regulating motor; 711. Through cavity; 712. First threaded rod; 72. Movable plate; 721. Second adjusting motor; 722. Second threaded sleeve; 723. Second threaded rod; 73. Third regulating motor; 731. Movable block; 732. Third threaded rod; 734. Driven insert rod; 735. Active insert sleeve. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] Reference Figures 1-10 An electronic component mounting machine for central processing unit packaging includes a base 1, a suction pen 12, and an annular fixing seat 2. The suction pen 12 is mounted on the upper side of the base 1 via a bracket 7 and a connecting rod 70. The annular fixing seat 2 is fixedly mounted on the upper middle part of the base 1. An annular slide rail 21 is provided inside the annular fixing seat 2. A second positioning toothed ring 22 is fixedly mounted on the periphery of the annular fixing seat 2. Multiple positioning seats 3 are provided inside the annular fixing seat 2. A first drive motor 31 and a second drive motor 34 are fixedly mounted on the upper end of the positioning seat 3. A positioning slider 33 is fixedly mounted on the lower end of the first drive motor 31 through its output shaft. The outer end of the positioning slider 33 is slidably connected to the annular slide rail 21. A second drive gear 35 is fixedly mounted on the lower end of the second drive motor 34 through its output shaft. The second drive gear 35 is meshed with the second positioning toothed ring 22. A movable seat 4 is inserted into the inner side of the positioning seat 3. A positioning platform 5 is fixedly mounted on the inner side of the movable seat 4. A positioning claw 53 is slidably mounted on the upper end of the positioning platform 5.

[0026] A cavity 32 is provided on one side of the positioning seat 3, and the positioning slider 33 is rotatably installed in the cavity 32, and the outer periphery of the positioning slider 33 is cam-shaped.

[0027] The positioning seat 3 has a first sliding cavity 41 at its upper end, and the movable seat 4 has a second sliding cavity 42 at its upper end. The first sliding cavity 41 and the second sliding cavity 42 are positioned corresponding to each other. A third drive motor 44 is fixedly installed on the upper end of the positioning seat 3. A third rack 43 is fixedly installed inside the second sliding cavity 42. A third drive gear 45 is fixedly installed on the lower side of the third drive motor 44 through its output shaft. The third drive motor 44 and the third drive gear 45 are respectively located on the upper and lower sides of the first sliding cavity 41, and the third drive gear 45 is meshed with the third rack 43.

[0028] The positioning platform 5 has a fourth limiting groove A51 on its upper end. A rotating disk 54 is rotatably installed inside the positioning platform 5. A fourth limiting groove B56 is provided on the upper end of the rotating disk 54. The number and position of the positioning claws 53 correspond one-to-one with the fourth limiting grooves A51 and B56. A fourth limiting slider A52, which is slidably connected to the fourth limiting groove A51, is fixedly installed at the lower end of the positioning claws 53. A fourth limiting slider B55, which is slidably connected to the fourth limiting groove B56, is fixedly installed at the lower end of the fourth limiting slider A52.

[0029] A connecting rod 61 is rotatably mounted inside the positioning seat 3, and a connecting sleeve 62 is rotatably mounted inside the movable seat 4. The connecting rod 61 and the connecting sleeve 62 are interlocked. A fourth drive motor 6 is fixedly mounted on the upper side of the positioning seat 3. A first bevel gear 64 is fixedly mounted on the lower side of the fourth drive motor 6 via its output shaft. A second bevel gear 63, which meshes with the first bevel gear 64, is fixedly mounted on the outer end of the connecting rod 61. A third bevel gear 65 is fixedly mounted on the lower end of the rotating disk 54. A fourth bevel gear 66, which meshes with the third bevel gear 65, is fixedly mounted on the outer end of the connecting sleeve 62.

[0030] The base 1 has a through cavity 711. The bracket 7 is U-shaped and slidably installed in the through cavity 711. A first adjusting motor 71 is fixedly installed on the outer wall of the base 1. A first threaded rod 712, which is slidably connected to the bracket 7, is fixedly installed on the outer end of the first adjusting motor 71 through its output shaft. A movable plate 72 is provided on the upper side of the bracket 7. A second threaded sleeve 722 is fixedly installed on the lower side of the movable plate 72. A second threaded rod 723, which meshes with the second threaded sleeve 722, is rotatably installed on one side of the bracket 7. A second adjusting motor 721 is fixedly installed on the outer wall of the bracket 7. The output shaft of the second adjusting motor 721 is rotatably connected to the second threaded rod 723 through a bevel gear set. A movable block 731 is slidably installed on the lower side of the movable plate 72, and a connecting rod 70 is fixedly installed on the lower end of the movable block 731. A third threaded rod 732, which is threadedly connected to the movable block 731, is rotatably installed on the lower side of the movable plate 72. A driven insert rod 734, which is rotatably connected to the third threaded rod 732 through a bevel gear set, is rotatably installed on the other side of the upper end of the bracket 7. An active insert sleeve 735, which is inserted and connected to the driven insert rod 734, is rotatably installed on one side of the outer wall of the bracket 7. A third adjusting motor 73 is fixedly installed on one side of the outer wall of the bracket 7. The output shaft of the third adjusting motor 73 is rotatably connected to the active insert sleeve 735 through a bevel gear set.

[0031] The working principle and usage of this invention are explained in detail below: The positioning seat 3 is inserted and installed on the upper side of the annular fixed seat 2, so that the second drive gear 35 and the second positioning gear ring 22 mesh with each other. When the positioning slider 33 corresponds to the position of the annular slide rail 21, the first drive motor 31 is started, and the positioning slider 33 is rotated through its output shaft. Since the outer periphery of the positioning slider 33 is cam-shaped, the positioning slider 33 is slidably connected to the annular slide rail 21. Then the second drive motor 34 is started, and the second drive gear 35 is rotated through its output shaft. Through the meshing connection between it and the second positioning gear ring 22, each positioning seat 3 is driven to move within the annular fixed seat 2.

[0032] Subsequently, the third drive motor 44 is started, and its output shaft drives the third drive gear 45 to rotate. Under the restriction of the movement direction of the movable seat 4 by the positioning seat 3, the rotating third drive gear 45 can drive the movable seat 4 to move through the meshing connection between it and the third rack 43, so as to achieve the effect of adjusting the position of the positioning table 5.

[0033] Through the plug-in connection between the connecting rod 61 and the connecting sleeve 62, and in conjunction with the meshing connection between the second bevel gear 63 and the first bevel gear 64 and between the fourth bevel gear 66 and the third bevel gear 65, the rotating disk 54 can always be connected to the output shaft of the fourth drive motor 6 when the movable seat 4 moves.

[0034] The circuit board substrate is placed in the annular fixing seat 2, and the positioning claw 53 is inserted and installed in the positioning hole on the outer periphery of the substrate.

[0035] The fourth drive motor 6 is started, and its output shaft drives the rotating disk 54 to rotate. The fourth limiting slide groove A51, through its sliding connection with the fourth limiting slider A52, restricts the movement direction of the positioning claws 53. This allows the rotating disk 54 to drive each positioning claw 53 to expand outward through the sliding connection between the fourth limiting slider B55 and the fourth limiting slide groove B56. This causes the positioning claws 53 to fit against the inner wall of the positioning hole, achieving the effect of positioning the circuit board substrate.

[0036] When it is necessary to adjust the position of the suction pen 12 Start the first adjusting motor 71, and drive the first threaded rod 712 to rotate through its output shaft. Under the restriction of the movement direction of the bracket 7 by the through cavity 711, the rotating first threaded rod 712 can drive the bracket 7 to move through the threaded connection between it and the bracket 7.

[0037] The second adjusting motor 721 is started, and the second threaded rod 723 is driven to rotate through its output shaft. With the bracket 7 connected to the driven insert 734 and the active insert 735, the direction of movement of the movable plate 72 is restricted, so that the rotating second threaded rod 723 can drive the movable plate 72 to move up and down through the threaded connection between it and the second threaded sleeve 722.

[0038] The third adjustment motor 73 is started, and its output shaft drives the active sleeve 735 to rotate. The active sleeve 735 is then connected to the driven rod 734, and the bevel gear set can drive the third threaded rod 732 to rotate. Since the movable block 731 is slidably installed on the lower side of the movable plate 72, rotating the third threaded rod 732 can drive the movable block 731 to move, thereby achieving the effect of adjusting the position and height of the pen 12.

[0039] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An electronic component placement machine for central processing unit packaging, comprising a base, a suction pen, and a ring-shaped fixing seat, characterized in that: The suction pen is mounted on the upper side of the base via a bracket and connecting rod. An annular fixing seat is fixedly mounted on the upper middle part of the base. An annular slide rail is provided inside the annular fixing seat. A second positioning toothed ring is fixedly mounted on the outer periphery of the annular fixing seat. Multiple positioning seats are provided inside the annular fixing seat. A first drive motor and a second drive motor are fixedly mounted on the upper end of the positioning seat. A positioning slider is fixedly mounted on the lower end of the first drive motor through its output shaft. The outer end of the positioning slider is slidably connected to the annular slide rail. A second drive gear is fixedly mounted on the lower end of the second drive motor through its output shaft. The second drive gear meshes with the second positioning toothed ring. A movable seat is inserted into the inner side of the positioning seat. A positioning platform is fixedly mounted on the inner side of the movable seat. A positioning claw is slidably mounted on the upper end of the positioning platform.

2. The electronic component mounting machine for central processing unit packaging according to claim 1, characterized in that: The positioning seat has a recessed cavity on one side, and the positioning slider is rotatably installed in the recessed cavity, with the outer periphery of the positioning slider being cam-shaped.

3. The electronic component mounting machine for central processing unit packaging according to claim 1, characterized in that: The positioning seat has a first sliding cavity at its upper end and a second sliding cavity at its upper end. The positions of the first sliding cavity and the second sliding cavity correspond to each other. A third drive motor is fixedly installed at the upper end of the positioning seat.

4. The electronic component mounting machine for central processing unit packaging according to claim 3, characterized in that: A third rack is fixedly installed inside the second sliding cavity, and a third drive gear is fixedly installed on the lower side of the third drive motor through its output shaft. The third drive motor and the third drive gear are respectively located on the upper and lower sides of the first sliding cavity, and the third drive gear is meshed with the third rack.

5. The electronic component mounting machine for central processing unit packaging according to claim 1, characterized in that: The positioning platform has a fourth limiting groove A at its upper end, and a rotating disk is rotatably installed inside the positioning platform. The upper end of the rotating disk has a fourth limiting groove B. The number and position of the positioning claws correspond one-to-one with the fourth limiting groove A and the fourth limiting groove B.

6. The electronic component mounting machine for central processing unit packaging according to claim 5, characterized in that: The lower end of the positioning claw is fixedly installed with a fourth limiting slider A that is slidably connected to the fourth limiting slide groove A. The lower end of the fourth limiting slider A is fixedly installed with a fourth limiting slider B that is slidably connected to the fourth limiting slide groove B. A connecting rod is rotatably installed inside the positioning seat, and a connecting cylinder is rotatably installed inside the movable seat. The connecting rod and the connecting cylinder are plugged into each other.

7. An electronic component mounting machine for central processing unit packaging according to claim 6, characterized in that: A fourth drive motor is fixedly installed on the upper side of the positioning seat. A first bevel gear is fixedly installed on the lower side of the fourth drive motor through its output shaft. A second bevel gear that meshes with the first bevel gear is fixedly installed on the outer end of the connecting rod. A third bevel gear is fixedly installed on the lower end of the rotating disk. A fourth bevel gear that meshes with the third bevel gear is fixedly installed on the outer end of the connecting tube.

8. The electronic component mounting machine for central processing unit packaging according to claim 1, characterized in that: The base has a through cavity, the bracket is U-shaped and is slidably installed in the through cavity, and a first adjusting motor is fixedly installed on the outer wall of the base. The outer end of the first adjusting motor is fixedly installed with a first threaded rod that is slidably connected to the bracket through its output shaft.

9. An electronic component mounting machine for central processing unit packaging according to claim 8, characterized in that: The bracket has a movable plate on its upper side, and a second threaded sleeve is fixedly installed on the lower side of the movable plate. A second threaded rod that meshes with the second threaded sleeve is rotatably installed on one side of the bracket. A second adjusting motor is fixedly installed on the outer wall of the bracket, and the output shaft of the second adjusting motor is rotatably connected to the second threaded rod through a bevel gear set.

10. An electronic component mounting machine for central processing unit packaging according to claim 9, characterized in that: A movable block is slidably installed on the lower side of the movable plate, and a connecting rod is fixedly installed at the lower end of the movable block. A third threaded rod that is threadedly connected to the movable block is rotatably installed on the lower side of the movable plate. A driven plug rod that is rotatably connected to the third threaded rod through a bevel gear set is rotatably installed on the lower side of the movable plate. An active plug sleeve that is plugged into and connected to the driven plug rod is rotatably installed on the other side of the upper end of the bracket. A third adjusting motor is fixedly installed on one side of the outer wall of the bracket. The output shaft of the third adjusting motor is rotatably connected to the active plug sleeve through a bevel gear set.

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