A fully automated production line integrating handling, scanning, positioning, and welding of end caps.

Abstract

This invention relates to the field of end cap processing technology, and in particular to an integrated fully automated production line for the handling, scanning, positioning, and welding of end caps. The line comprises: two identical processing units for transporting, positioning, scanning, and welding end caps; each processing unit includes: a first conveyor frame and a second conveyor frame, respectively for conveying the end caps and their accessories; a material rack, located between the first and second conveyor frames, for placing the processed accessories; two sets of positioning fixtures, symmetrically distributed between the first and second conveyor frames, for clamping and positioning the end caps; a gripping robot, located between the two sets of positioning fixtures, for picking up and placing the end cap processing accessories; a material gripper, mounted on the gripping robot, for gripping operations; an industrial scanning camera, mounted on the gripping robot, for scanning; and two welding robots, each located on one side of the two sets of positioning fixtures, for welding operations.

Description

Technical Field

[0001] This invention relates to the field of end cap processing technology, and in particular to an integrated fully automated production line for the handling, scanning, positioning and welding of end caps. Background Technology

[0002] In modern manufacturing, end caps are crucial components of pressure vessels and piping systems, and their production process demands stringent precision and efficiency. Traditional end cap manufacturing relies heavily on manual operation, leading to issues such as inaccurate positioning, inconsistent welding quality, and low production efficiency. With the development of industrial automation, more and more companies are introducing robotics and automated production lines to improve the efficiency and quality of end cap production. However, processes such as handling, scanning, positioning, and welding are often distributed across different equipment, resulting in a complex overall process, increased material handling time and costs, and the difficulty of achieving high-precision workpiece positioning with traditional fixtures, affecting subsequent welding quality. Furthermore, existing equipment has poor adaptability to end caps of different specifications and shapes, requiring frequent adjustments or tooling changes, reducing the versatility and efficiency of the production line.

[0003] To address this issue, the present invention proposes an integrated fully automated production line for the handling, scanning, positioning, and welding of end caps, thus providing a solution. Summary of the Invention

[0004] The purpose of this invention is to at least address one of the aforementioned technical deficiencies.

[0005] Therefore, one object of the present invention is to provide an integrated fully automated production line for the handling, scanning, positioning and welding of end caps, so as to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0006] To achieve the above objectives, one embodiment of the present invention provides an integrated fully automated production line for transporting, scanning, positioning, and welding end caps, comprising: two identical processing units for transporting, positioning, scanning, and welding end caps; each processing unit comprising: a first conveyor frame and a second conveyor frame for transporting end caps and their accessories; a material rack disposed between the first and second conveyor frames for placing the processed accessories; two sets of positioning fixtures symmetrically distributed between the first and second conveyor frames for clamping and positioning the end caps; a gripping robot disposed between the two sets of positioning fixtures for picking up and placing the end cap processing accessories; a gripper mounted on the gripping robot for gripping operations; an industrial scanning camera mounted on the gripping robot for scanning; and two welding units. Robots are positioned on one side of two sets of positioning fixtures for welding operations. Welding heads are mounted on the welding robots. A transport unit serves the two processing units and includes: a base for bottom support, with a rack mounted on the base; a sliding frame on the base; a drive motor mounted on the sliding frame, with a first gear meshing with the rack at its output end; a transport robot mounted on the sliding frame for transporting materials from the first and second conveyor frames; and a clamping assembly mounted on one end of the transport robot for clamping and securing the materials. The transport robot, in conjunction with the gripping robot, stacks the materials onto the positioning fixtures, and after processing, the transport robot removes the finished product from the positioning fixtures.

[0007] Preferably, in any of the above embodiments, a single set of positioning fixtures includes: a support frame, the main support for the seat positioning fixture; a flipping frame, mounted on the support frame, with a first motor installed inside the flipping frame; a support frame, with side brackets mounted at both ends, the side brackets being rotatably mounted on the flipping frame, one of the side brackets being mounted on the output end of the first motor, a through hole being provided on the support frame, and a protective shell being installed on the top of the support frame; a rotating ring, rotatably mounted inside the protective shell, with a first fixed clamping block mounted on the rotating ring; and a first electric push rod, with a first movable clamping block mounted on its output shaft.

[0008] Preferably, in any of the above embodiments, the single positioning fixture further includes: a support plate, installed at one end of the rotating ring, with the first electric push rod installed on the support plate; a second motor, installed inside the support frame, with a second gear installed at the output end of the second motor, the second gear being placed inside the protective shell; and a gear ring, installed at the bottom of the rotating ring, the gear ring meshing with the second gear.

[0009] Preferably, in any of the above embodiments, the gripping robot and the welding robot have the same structural composition, both including: a base frame as a bottom support; a first base platform mounted on the base frame; a first rotating part rotatably disposed on the first base platform; a first swing arm part rotatably disposed on the first rotating part; a second swing arm part rotatably disposed on the first swing arm part; a second rotating part rotatably disposed on the second swing arm part; a third swing arm part rotatably disposed on the second rotating part; each moving part is equipped with a servo motor drive.

[0010] Preferably, in any of the above solutions, the first rotating part is driven to rotate by a servo motor; the first swing arm part is driven to swing by a servo motor; and the second swing arm part is equipped with three servo motors, which are used for swinging themselves, driving the second rotating part to rotate through a transmission rod, and driving the third swing arm part to swing, respectively.

[0011] Preferably, according to any of the above embodiments, the handling robot includes: a second base platform mounted on a base; a third rotating part rotatably disposed on the second base platform; a fourth swing arm part rotatably disposed on the third rotating part; a fifth swing arm part rotatably disposed on the fourth swing arm part; a fourth rotating part rotatably disposed on the fourth swing arm part; a sixth swing arm part rotatably disposed on the fourth rotating part; each moving part is equipped with a servo motor drive.

[0012] Preferably, in any of the above schemes, the third rotating part is driven to rotate by a servo motor; the fourth swing arm is equipped with three servo motors, which are used for swinging themselves, driving the fourth rotating part to rotate through a transmission rod, and driving the sixth swing arm to swing.

[0013] Preferably, according to any of the above embodiments, the clamping assembly includes: a positioning ring with a fixing block installed at one end, the fixing block being installed on the sixth swing arm; a second fixed clamping block installed inside the positioning ring; a second electric push rod installed on the positioning ring via a connecting block; and a second movable clamping block installed at the output end of the second electric push rod.

[0014] Preferably, in any of the above embodiments, there are two second fixed clamping blocks, symmetrically distributed within the positioning ring; there are two second electric push rods, and two connecting blocks connected to them, also symmetrically distributed; there are two second movable clamping blocks, each connected to one of the two second electric push rods; the positioning ring has a through hole for the output shaft of the second electric push rod to move; a guide rod is installed at one end of the movable clamping block, and the guide rod is slidably disposed on the positioning ring.

[0015] Preferably, as described in any of the above embodiments, a guide rail is installed on the top of the base; and a guide block is installed on the bottom of the sliding frame, the guide block being slidably disposed on the guide rail.

[0016] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0017] 1. Integrating functions such as handling, scanning, positioning, and welding into a compact production line simplifies the process, reduces intermediate steps, and improves production efficiency.

[0018] 2. By using two sets of positioning fixtures in conjunction with the industrial scanning camera on the gripping robot, precise positioning of the end caps and their accessories is achieved. At the same time, the application of the welding robot ensures the accuracy of the welding position, improves the welding quality and consistency, and allows for flexible adjustment of the working parameters of each module according to specific needs. It is suitable for the production of end caps of various specifications and shapes, enhancing the adaptability of the production line. The design of the positioning fixtures takes into account rotation and translation functions, which can meet the processing requirements of different angles and positions.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a three-dimensional schematic diagram according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the conveying unit according to an embodiment of the present invention;

[0023] Figure 3 According to embodiments of the present invention Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a schematic diagram of the installation of the handling robot according to an embodiment of the present invention;

[0025] Figure 5 According to embodiments of the present invention Figure 4 Enlarged view of point B in the middle;

[0026] Figure 6 This is a partial schematic diagram according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the mounting bracket according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the installation of an industrial inspection camera according to an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the welding head installation according to an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of a positioning tooling according to an embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the support plate installation according to an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of a toothed ring connection according to an embodiment of the present invention.

[0033] In the diagram: 1. Processing unit; 11. First conveyor frame; 12. Second conveyor frame; 13. Material rack; 14. Positioning fixture; 1401. Support frame; 1402. Tilting frame; 1403. First motor; 1404. Support frame; 1405. Side bracket; 1406. Rotating ring; 1407. First fixed clamping block; 1408. First electric push rod; 1409. First moving clamping block; 1410. Second motor; 1411. Second gear; 1412. Gear ring; 1413. Support plate; 15. Gripping robot; 1501. Grip; 1502. Industrial scanning camera; 16. Welding robot; 1601. Welding head; 101. Base frame; 102. First base platform; 103. First rotating part; 104. 105. First swing arm, 106. Second swing arm, 107. Second rotating part, 108. Third swing arm, 2. Transporting part, 21. Base, 2101. Guide rail, 22. Rack, 23. Sliding frame, 2301. Guide block, 24. Drive motor, 25. First gear, 26. Transporting robot, 2601. Second base platform, 2602. Third rotating part, 2603. Fourth swing arm, 2604. Fifth swing arm, 2605. Fourth rotating part, 2606. Sixth swing arm, 27. Clamping assembly, 2701. Positioning ring, 2702. Fixed block, 2703. Second fixed clamping block, 2704. Second electric push rod, 2705. Second moving clamping block, 2706. Guide rod. Detailed Implementation

[0034] like Figures 1 to 12 As shown, the integrated fully automated production line for handling, scanning, positioning and welding of end caps includes: a processing unit 1 and a handling unit 2.

[0035] Furthermore, the processing unit 1 is provided in two sets, and the two sets have the same structure, used for transporting, positioning, scanning and welding the end caps. Each set of the processing unit 1 includes:

[0036] The first conveyor frame 11 and the second conveyor frame 12 are respectively used to convey the end cap and its accessories;

[0037] The material rack 13 is located between the first conveyor rack 11 and the second conveyor rack 12 and is used to place the processed parts;

[0038] Two sets of positioning fixtures 14 are symmetrically distributed between the first conveyor frame 11 and the second conveyor frame 12, and are used to clamp and position the end cap.

[0039] The gripping robot 15 is positioned between two sets of positioning fixtures 14 and is used to pick up and place the head processing parts.

[0040] The gripper 1501 is installed on the gripping robot 15 and is used for gripping operations;

[0041] An industrial scanning camera 1502 is mounted on a gripping robot 15 for scanning.

[0042] Two sets of welding robots 16 are respectively set on one side of two sets of positioning fixtures 14 for welding work;

[0043] Welding head 1601 is mounted on welding robot 16.

[0044] Specifically, the single positioning fixture 14 includes:

[0045] Support frame 1401, the main support for seat positioning fixture 14;

[0046] A tilting frame 1402 is mounted on the support frame 1401, and a first motor 1403 is installed inside the tilting frame 1402.

[0047] The support frame 1404 has side brackets 1405 installed at both ends. The side brackets 1405 are rotatably mounted on the flipping frame 1402. One of the side brackets 1405 is installed at the output end of the first motor 1403. The support frame 1404 has a through hole and a protective shell is installed on the top of the support frame 1404.

[0048] A rotating ring 1406 is rotatably disposed inside the protective shell, and a first fixed clamping block 1407 is installed on the rotating ring 1406.

[0049] The first electric push rod 1408 has a first movable clamping block 1409 mounted on its output shaft;

[0050] The single positioning fixture 14 also includes:

[0051] A support plate 1413 is installed at one end of a rotating ring 1406, and the first electric push rod 1408 is installed on the support plate 1413.

[0052] The second motor 1410 is installed inside the support frame 1404. The output end of the second motor 1410 is equipped with a second gear 1411, which is placed inside the protective shell.

[0053] A gear ring 1412 is installed at the bottom of a rotating ring 1406. The gear ring 1412 meshes with a second gear 1411. The second gear 1411 is driven to rotate by a second motor 1410. The second gear 1411 drives the gear ring 1412 to rotate, thereby driving the rotating ring 1406 to rotate and causing the workpiece on it to rotate.

[0054] The gripping robot 15 and the welding robot 16 have the same structure and composition, both including:

[0055] Seat 101 serves as the bottom support;

[0056] The first base 102 is mounted on the bracket 101;

[0057] The first rotating part 103 is rotatably mounted on the first base 102;

[0058] The first swing arm 104 is rotatably mounted on the first rotating part 103;

[0059] The second swing arm 105 is rotatably mounted on the first swing arm 104;

[0060] The second rotating part 106 is rotatably mounted on the second swing arm part 105;

[0061] The third swing arm 107 is rotatably mounted on the second rotating part 106;

[0062] Each moving part is equipped with a servo motor drive;

[0063] The first rotating part 103 is driven to rotate by a servo motor;

[0064] The first swing arm 104 is driven to swing by a servo motor;

[0065] The second swing arm 105 is equipped with three servo motors, which are used for swinging itself, driving the second rotating part 106 to rotate via a transmission rod, and driving the third swing arm 107 to swing.

[0066] Specifically, when welding the finished end cap, the finished product is mostly composed of a bottom ring and a cap. The cap often has holes for installing valves. These holes require small ring parts for welding. In this device, the first conveyor frame 11 and the second conveyor frame 12 are used to convey the cap and the bottom ring, respectively. The handling unit 2 is used to handle them. The gripping robot 15 is used to handle the small ring parts. The industrial scanning camera 1502 is used to position the holes opened on the cap.

[0067] Furthermore, the conveying unit 2 serves two sets of processing units 1, including:

[0068] The base 21 is used for bottom support of the conveying part 2, and a rack 22 is installed on the base 21;

[0069] The sliding frame 23 is mounted on the base 21;

[0070] A drive motor 24 is mounted on a sliding frame 23. A first gear 25 is mounted on the output end of the drive motor 24. The first gear 25 meshes with a rack 22.

[0071] The material handling robot 26 is mounted on the sliding frame 23 and is used to handle materials on the first conveyor frame 11 and the second conveyor frame 12.

[0072] The clamping assembly 27 is installed at one end of the handling robot 26 and is used to clamp and fix the material.

[0073] The transport robot 26 works with the gripping robot 15 to stack the material on the positioning fixture 14, and after processing, the transport robot 26 removes the finished product from the positioning fixture 14.

[0074] Specifically, the transport robot 26 includes:

[0075] The second base 2601 is mounted on the base 21;

[0076] The third rotating part 2602 is rotatably mounted on the second base 2601;

[0077] The fourth swing arm 2603 is rotatably mounted on the third rotating part 2602;

[0078] The fifth swing arm 2604 is rotatably mounted on the fourth swing arm 2603;

[0079] The fourth rotating part 2605 is rotatably mounted on the fourth swing arm part 2603;

[0080] The sixth swing arm 2606 is rotatably mounted on the fourth rotating part 2605;

[0081] Each moving part is equipped with a servo motor drive;

[0082] The third rotating part 2602 is driven to rotate by a servo motor;

[0083] The fourth swing arm 2603 is equipped with three servo motors, which are used for swinging itself, driving the fourth rotating part 2605 to rotate via a transmission rod, and driving the sixth swing arm 2606 to swing.

[0084] The clamping assembly 27 includes:

[0085] A positioning ring 2701 has a fixing block 2702 installed at one end, and the fixing block 2702 is installed on the sixth swing arm 2606.

[0086] The second fixed clamping block 2703 is installed inside the positioning ring 2701;

[0087] The second electric push rod 2704 is mounted on the positioning ring 2701 via a connecting block;

[0088] The second moving clamp 2705 is installed at the output end of the second electric push rod 2704;

[0089] There are two second clamping blocks 2703, which are symmetrically distributed inside the positioning ring 2701;

[0090] There are two second electric push rods 2704, and two connecting blocks connected to them are also provided, both of which are symmetrically distributed;

[0091] There are two second moving clamps 2705, which are respectively connected to two second electric push rods 2704;

[0092] The positioning ring 2701 has a through hole for the output shaft of the second electric push rod 2704 to move.

[0093] A guide rod 2706 is installed at one end of the second movable clamping block 2705. The guide rod 2706 is slidably disposed on the positioning ring 2701. The arrangement of the guide rod 2706 limits the movement trajectory of the movable clamping block.

[0094] A guide rail 2101 is mounted on the top of the base 21;

[0095] A guide block 2301 is installed at the bottom of the sliding frame 23. The guide block 2301 is slidably mounted on the guide rail 2101. The cooperation between the guide block 2301 and the guide rail 2101 is used to limit the movement trajectory of the sliding frame 23.

[0096] The fully automated production line for handling, scanning, positioning, and welding of end caps works on the following principle:

[0097] The workpieces required for the finished head are transported separately via the first conveyor frame 11 and the second conveyor frame 12;

[0098] The materials on the first conveyor frame 11 and the second conveyor frame 12 are sequentially transported to the positioning fixture 14 by the handling assembly;

[0099] The movement of the transport component is as follows: the drive motor 24 drives the first gear 25 to rotate, and the first gear 25 moves on the rack 22. Since the rack 22 is fixed, the first gear 25 both rotates and moves on the rack 22, thereby driving the slide frame 23 to move. The movement of the third rotating part 2602, the fourth swing arm part 2603, the fifth swing arm part 2604, the fourth rotating part 2605 and the sixth swing arm part 2606 drives the clamping component 27 to be placed at the workpiece. The second electric push rod 2704 drives the second moving clamping block 2705 to move towards the position of the second fixed clamping block 2703 until the workpiece is clamped between the second fixed clamping block 2703 and the second moving clamping block 2705. Then, the transport robot 26 transports the workpiece to the rotating ring 1406. After that, the clamping of the workpiece is released and the transport component is withdrawn.

[0100] When the workpiece at the bottom is placed on the rotating ring 1406 inside the positioning fixture 14, the first moving clamping block 1409 is driven to move by the first electric push rod 1408. The first moving clamping block 1409 moves towards the position of the first fixed clamping block 1407 until the workpiece is clamped between the first moving clamping block 1409 and the first fixed clamping block 1407. The first motor 1403 drives the side bracket 1405 to rotate, which in turn drives the flipping frame 1402 to rotate half a turn, so that welding work can be performed on the other side. The second motor 1410 drives the second gear 1411, which drives the gear ring 1412 to rotate, which in turn drives the rotating ring 1406 to rotate, and thus drives the workpiece to rotate. Through the cooperation of the first motor 1403 and the second motor 1410, the workpiece can be processed in all aspects.

[0101] The required parts are gripped by the gripper 1501 and moved by the handling robot 26. During this process, the position of the parts (holes on the main workpiece) is scanned by the industrial scanning camera 1502, thereby achieving precise positioning.

[0102] The welding robot 16 drives the welding head 1601 to weld the workpiece.

Claims

1. A fully automated production line integrating the handling, scanning, positioning, and welding of end caps, characterized in that: include: Two identical processing units are used for transporting, positioning, scanning, and welding the end caps. Each processing unit includes: The first and second conveyor frames are used to convey the end caps and their accessories, respectively. The material rack, located between the first and second conveyor racks, is used to place processed parts; Two sets of positioning fixtures are symmetrically distributed between the first and second conveyor frames to clamp and position the end caps. A gripping robot, positioned between two sets of positioning fixtures, is used to pick up and place end cap processing parts. The gripper is installed on the gripping robot and is used for gripping operations; Industrial scanning cameras, mounted on gripping robots, are used for scanning. Two sets of welding robots are respectively set on one side of two sets of positioning fixtures for welding work; The welding head is mounted on the welding robot; The material handling department serves two processing departments, including: A base for supporting the bottom of the transport unit, wherein a rack is mounted on the base; The sliding frame is mounted on the base; A drive motor is mounted on the sliding frame, and a first gear is installed at the output end of the drive motor, which meshes with a rack. A material handling robot, mounted on the sliding frame, is used to handle materials on the first and second conveyor frames. A clamping assembly is installed at one end of the handling robot for clamping and fixing materials; The transport robot, in conjunction with the gripping robot, stacks the material onto the positioning fixture, and after processing, the transport robot removes the finished product from the positioning fixture.

2. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 1, characterized in that: The single positioning fixture includes: Support frame, the main support for the seat positioning fixture; A tilting frame is mounted on the support frame, and a first motor is installed inside the tilting frame; A support frame is provided with side brackets at both ends. The side brackets are rotatably mounted on the tilting frame. One of the side brackets is installed at the output end of the first motor. A through hole is provided on the support frame. A protective shell is installed on the top of the support frame. A rotating ring is rotatably disposed within the protective shell, and a first fixed clamping block is mounted on the rotating ring; The first electric actuator has a first moving clamp mounted on its output shaft.

3. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 2, characterized in that: The positioning fixture in a single set also includes: A support plate is installed at one end of the rotating ring, and the first electric push rod is installed on the support plate. The second motor is installed inside the support frame, and a second gear is installed at the output end of the second motor. The second gear is placed inside the protective shell. A gear ring is installed at the bottom of the rotating ring, and the gear ring meshes with the second gear.

4. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 1, characterized in that: The gripping robot and the welding robot have the same structural composition, both including: The base serves as a support. The first base is mounted on the frame; The first rotating part is rotatably mounted on the first base platform; The first swing arm is rotatably mounted on the first rotating part; The second swing arm is rotatably mounted on the first swing arm. The second rotating part is rotatably mounted on the second swing arm part; The third swing arm is rotatably mounted on the second rotating part; Each moving part is equipped with a servo motor drive.

5. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 4, characterized in that: The first rotating part is driven to rotate by a servo motor; The first swing arm is driven to swing by a servo motor; The second swing arm is equipped with three servo motors, which are used for swinging itself, driving the second rotating part to rotate through the transmission rod, and driving the third swing arm to swing.

6. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 1, characterized in that: The transport robot includes: The second base is installed on the base. The third rotating part is rotatably mounted on the second base platform; The fourth swing arm is rotatably mounted on the third rotating part; The fifth swing arm is rotatably mounted on the fourth swing arm. The fourth rotating part is rotatably mounted on the fourth swing arm. The sixth swing arm is rotatably mounted on the fourth rotating part; Each moving part is equipped with a servo motor drive.

7. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 6, characterized in that: The third rotating part is driven to rotate by a servo motor; The fourth swing arm is equipped with three servo motors, which are used for swinging itself, driving the fourth rotating part to rotate through the transmission rod, and driving the sixth swing arm to swing.

8. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 7, characterized in that: The clamping assembly includes: A positioning ring, one end of which is fitted with a fixing block, which is mounted on the sixth swing arm; The second clamping block is installed inside the positioning ring; The second electric push rod is mounted on the positioning ring via a connecting block; The second moving clamp is installed at the output end of the second electric push rod.

9. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 8, characterized in that: There are two second clamping blocks, which are symmetrically distributed inside the positioning ring; There are two second electric push rods, and two connecting blocks connected to them, all symmetrically distributed. There are two second moving clamps, each connected to one of the two second electric push rods; The positioning ring has a through hole for the output shaft of the second electric push rod to move. A guide rod is installed at one end of the movable clamping block, and the guide rod is slidably mounted on the positioning ring.

10. The integrated fully automated production line for handling, scanning, positioning, and welding of end caps according to claim 1, characterized in that: A guide rail is mounted on the top of the base; The bottom of the sliding frame is equipped with a guide block, which is slidably mounted on the guide rail.

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