Swing arm joint angle adjustment mechanism

Abstract

The utility model relates to mechanical transmission and automation control technical field, especially a kind of swing arm joint angle adjusting mechanism, including L-shaped installation backplate, the front end middle part of L-shaped installation backplate is fixedly connected with long limiting plate, the rear end left part of fixed plate is fixedly connected with swing mechanism, the rear end of slider is opened with sliding slot, the opposite face of two the side block is fixedly connected with limiting block, the upper end middle part of limiting block is opened with the limiting slot that penetrates, the utility model solves the problem that traditional swing arm joint angle adjusting mechanism angle adjusting precision is low, swing is easy to deviate, and component layout is disorderly, space utilization is low, and the problem that later maintenance is difficult, through synchronous toothed belt drive cooperation limiting guide structure, L-shaped installation backplate integrated layout and simple dismounting design, the accurate adjustment of swing arm joint angle is realized, improves mechanism space utilization and operating safety, while simplifying component maintenance dismounting process.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission and automation control technology, and in particular to a swing arm joint angle adjustment mechanism. Background Technology

[0002] In current automated equipment, the angle adjustment mechanism of the swing arm joint mostly relies on a single gear transmission or hydraulic drive. The former is prone to insufficient angle adjustment accuracy due to transmission backlash, while the latter has problems such as complex pipeline layout and high maintenance costs. In scenarios with stringent precision requirements, such as electronic component assembly and precision parts handling, traditional mechanisms often cause workpiece misalignment or placement deviation due to swing trajectory deviation and unstable power transmission, affecting production efficiency. At the same time, the power components and limit components of most mechanisms are scattered, which not only occupies equipment space, but also easily causes safety hazards due to messy wires and air pipes. Moreover, the disassembly and assembly of components are cumbersome, and subsequent maintenance requires a lot of time.

[0003] Traditional swing arm joint adjustment mechanisms mostly adopt a single transmission structure, which has a large transmission gap and lacks effective trajectory constraints, resulting in low angle adjustment accuracy and easy deviation during swing. This cannot meet the requirements for the precision of swing arm movement in precision manufacturing scenarios. The existing mechanism has a messy layout of power components, limit components, pipelines, and wires, resulting in low space utilization and safety hazards. At the same time, the component installation method is complicated, and the subsequent maintenance and disassembly are difficult, which increases the equipment operation and maintenance costs and time. Therefore, it is necessary to design a swing arm joint angle adjustment mechanism to solve the above problems. Utility Model Content

[0004] The main purpose of this invention is to provide a swing arm joint angle adjustment mechanism, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An arm joint angle adjustment mechanism includes an L-shaped mounting back plate. A long limiting plate is fixedly connected to the middle of the front end of the L-shaped mounting back plate. A fixing plate is fixedly connected to the middle of the upper end of the L-shaped mounting back plate. A power box is fixedly connected to the rear end of the L-shaped mounting back plate, and the power box is located behind the fixing plate. A swing mechanism is fixedly connected to the left rear end of the fixing plate. A slider is slidably connected to the outer side of the long limiting plate. A sliding groove is opened at the rear end of the slider. A side block is fixedly connected to the middle of the front end of the slider by bolts. Two side blocks are provided. The opposing surfaces of the two side blocks are fixedly connected to a limiting block. A through limiting groove is opened at the middle of the upper end of the limiting block.

[0007] Preferably, the swing mechanism includes a drive motor and a synchronous toothed belt. The output end of the drive motor passes through the fixed plate and is fixedly connected to a first gear. The first gear is connected to a second gear via the synchronous toothed belt. A fixed shaft is fixedly connected to the middle of the front end of the second gear. A rear mounting plate is fixedly connected to the middle of the outer surface of the fixed shaft. Screws are fixedly connected to the four sides of the front end of the rear mounting plate. A main body component is sleeved on the front of the outer surface of the rear mounting plate. Nuts are threaded onto the front of the outer surface of the screws. A front mounting plate is sleeved on the front of the outer surface of the fixed shaft. A mounting hole is opened on the four sides of the front end of the front end of the front mounting plate. The drive motor is fixedly connected to the left rear end of the fixed plate.

[0008] Preferably, the main component includes a rocker arm and a cylinder. The upper front end of the rocker arm is movably connected to a connecting shaft via a bearing. A movable plate is fixedly connected to the outer surface of the connecting shaft. A base plate is fixedly connected to the lower end of the movable plate. The output end of the cylinder passes through the base plate and is fixedly connected to a suction cup. The lower front end of the rocker arm has two mounting holes and a mounting groove. There are four mounting holes, and the mounting holes are located around the outer perimeter of the mounting groove. The rocker arm is sleeved on the outer surface of the fixed shaft.

[0009] Preferably, the rear end of the second leather gear is movably connected to the front right side of the fixed plate via a rotating shaft. The first leather gear and the second leather gear are distributed with the left side lower than the right side. The fixed shaft column passes through the front end of the L-shaped mounting back plate and is located directly above the long limiting plate.

[0010] Preferably, the positional dimensions of the four screws correspond one-to-one with the positional dimensions of the mounting hole one, the rear mounting plate and the front mounting plate are arranged parallel to each other, and the distance between the rear mounting plate and the front mounting plate is equal to the thickness of the rocker arm, and the nut is tightly fitted to the front end face of the front mounting plate after being tightened.

[0011] Preferably, the movable plate and the base plate are vertically connected at 90 degrees, the movable plate is vertically slidably connected in the limiting groove, the position dimensions of the four mounting holes correspond one-to-one with the position dimensions of the screw, and the cylinder is connected to an external air source through an air pipe.

[0012] Preferably, the left cross-section of the long limiting plate has an I-shaped structure, and the slider is slidably connected to the long limiting plate through a groove, the cross-sectional shape of the groove matching the cross-sectional shape of the long limiting plate.

[0013] Preferably, the power supply box is electrically connected to the drive motor via wires, the wires are arranged along the rear edge of the fixing plate and fixed by clips, and the output voltage of the power supply box matches the rated voltage of the drive motor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this utility model, a synchronous toothed belt transmission structure replaces the traditional single gear transmission, reducing transmission gap and improving the accuracy of power transmission. At the same time, it is combined with the matching sliding structure of the I-shaped long limiting plate and the slider, and the limiting groove of the limiting block guides and constrains the moving plate to form a dual precision control. This structure can effectively limit the swing trajectory of the swing arm, avoid deviation during the swing, and ensure that the angle adjustment accuracy of the swing arm joint meets the needs of precision manufacturing scenarios. It solves the problems of low angle adjustment accuracy and swing deviation caused by large transmission gap and lack of effective trajectory constraint in traditional mechanisms.

[0016] 2. In this utility model, by using an L-shaped mounting backplate as the integrated mounting base, the power components, limit components, power supply box and other components are compactly arranged. At the same time, the wires and air pipes are arranged in an orderly manner and fixed with buckles, which greatly improves the space utilization and eliminates safety hazards. In addition, the components are assembled with simple connecting parts such as bolts and nuts, such as the side block and slider, the rear mounting plate and the front mounting plate for clamping and fixing the rocker arm, which are all convenient for quick assembly and disassembly. This design effectively solves the problems of chaotic layout, low space utilization, and complex component installation in existing mechanisms, which lead to difficult maintenance and high operation and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a first-view structural schematic diagram of a swing arm joint angle adjustment mechanism according to the present invention;

[0018] Figure 2 This is a second-view structural schematic diagram of a swing arm joint angle adjustment mechanism according to the present invention;

[0019] Figure 3 This is a schematic diagram of the swing mechanism structure of a swing arm joint angle adjustment mechanism according to this utility model;

[0020] Figure 4 This is a schematic diagram of the main component structure of a swing arm joint angle adjustment mechanism according to the present invention;

[0021] Figure 5 This is an enlarged structural diagram showing the details of section A of the swing arm joint angle adjustment mechanism of this utility model;

[0022] Figure 6 This is a detailed enlarged structural diagram of section B of the swing arm joint angle adjustment mechanism of this utility model.

[0023] In the diagram: 1. L-shaped mounting backplate; 2. Swing mechanism; 3. Long limiting plate; 4. Slider; 5. Limiting block; 6. Fixing plate; 7. Power supply box; 8. Side block; 9. Slide groove; 10. Limiting groove; 21. Drive motor; 22. Gear 1; 23. Synchronous gear belt; 24. Gear 2; 25. Fixed shaft; 26. Main assembly; 27. Rear mounting plate; 28. Screw; 29. ​​Nut; 210. Front mounting plate; 211. Mounting hole 1; 261. Swing arm; 262. Connecting shaft; 263. Movable plate; 264. Mounting groove; 265. Mounting hole 2; 266. Base plate; 267. Cylinder; 268. Suction cup. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figure 1-6 This utility model provides a technical solution:

[0028] A swing arm joint angle adjustment mechanism, such as Figure 1 , Figure 2 and Figure 5As shown, the device includes an L-shaped mounting backplate 1. A long limiting plate 3 is fixedly connected to the middle of the front end of the L-shaped mounting backplate 1. A fixing plate 6 is fixedly connected to the middle of the upper end of the L-shaped mounting backplate 1. A power box 7 is fixedly connected to the rear of the upper end of the L-shaped mounting backplate 1, and the power box 7 is located behind the fixing plate 6. A swing mechanism 2 is fixedly connected to the left rear end of the fixing plate 6. A slider 4 is slidably connected to the outer side of the long limiting plate 3. A groove 9 is opened at the rear end of the slider 4. A side block 8 is fixedly connected to the middle of the front end of the slider 4 by bolts. The side block 8 is set with... There are two side blocks 8, and the opposite surfaces of the two side blocks 8 are fixedly connected to the limiting block 5. The upper middle part of the limiting block 5 has a through limiting groove 10. The left cross section of the long limiting plate 3 has an I-shaped structure. The slider 4 is slidably connected to the long limiting plate 3 through the sliding groove 9. The cross-sectional shape of the sliding groove 9 matches the cross-sectional shape of the long limiting plate 3. The power box 7 is electrically connected to the drive motor 21 through wires. The wires are arranged along the rear edge of the fixing plate 6 and fixed by buckles. The output voltage of the power box 7 matches the rated voltage of the drive motor 21.

[0029] Through the above scheme: the swing arm joint angle adjustment mechanism uses an L-shaped mounting back plate 1 as the overall mounting base. The left cross-section of the long limiting plate 3 fixed at the middle of its front end has an I-shaped structure, which provides a sliding track for the slider 4. The slider 4 achieves stable sliding through the sliding groove 9 at the rear end that matches the cross-sectional shape of the long limiting plate 3. The two side blocks 8 fixed at the middle of the front end of the slider 4 by bolts are used to fix and connect the limiting block 5. The limiting groove 10 penetrating the middle of the upper end of the limiting block 5 can guide and limit the subsequent linkage components. At the same time, the fixing plate 6 fixed at the middle of the upper end of the L-shaped mounting back plate 1 provides mounting support for the swing mechanism 2. The swing mechanism 2 fixed at the left rear end of the fixing plate 6 is used to adjust the angle of the swing arm joint. The core power component for the degree adjustment is the power box 7, which is fixed to the rear of the upper end of the L-shaped mounting back plate 1 and behind the fixing plate 6. Power is supplied to the drive motor 21 in the swing mechanism 2 via wires arranged along the rear edge of the fixing plate 6 and secured by clips. The output voltage of the power box 7 matches the rated voltage of the drive motor 21, ensuring stable operation of the drive motor 21. During operation, the power box 7 supplies power to the drive motor 21, which drives the swing mechanism 2. The swing mechanism 2, during operation, drives the related moving parts. The limiting groove 10 of the limiting block 5 constrains the movement trajectory of the moving parts. The slider 4 moves along the long limiting plate 3 with the movement of the moving parts. The sliding mechanism further assists in ensuring the smooth movement of the linkage components, thereby achieving precise adjustment of the swing arm joint angle. The L-shaped mounting backplate 1 effectively utilizes space and provides reliable mounting positions for each component. The I-beam structure of the long limiting plate 3 and its matching design with the slide groove 9 of the slider 4 prevent the slider 4 from shifting or falling off during sliding, improving sliding stability. The fixed connection design of the two side blocks 8 to the limiting block 5 ensures that the limiting block 5 will not loosen during operation, guaranteeing the stable operation of the limiting groove 10. The fixed plate 6 securely mounts the swing mechanism 2, preventing wobbling during operation and ensuring stable power transmission. The orderly arrangement of the matching voltage and wires between the box 7 and the drive motor 21 not only ensures the normal and efficient operation of the drive motor 21, but also avoids messy wires affecting the operation of the mechanism or causing safety hazards. The beneficial effects of this solution are that the overall structure is compact and reasonable, and the connection of each component is stable and reliable. Through the matching sliding structure of the long limit plate 3 and the slider 4, the guiding and limiting function of the limit block 5 and the limit groove 10, and the stable power supply of the power box 7 and the drive motor 21, the accuracy and stability of the swing arm joint angle adjustment are effectively improved. At the same time, the installation of each component is simple and convenient, which facilitates later maintenance and repair, and can meet the usage needs of swing arm joint angle adjustment in different scenarios.

[0030] Please see Figure 3 , Figure 4 and Figure 6The swing mechanism 2 includes a drive motor 21 and a synchronous toothed belt 23. The output end of the drive motor 21 passes through the fixed plate 6 and is fixedly connected to a first gear 22. The first gear 22 is connected to a second gear 24 via the synchronous toothed belt 23. A fixed shaft 25 is fixedly connected to the middle of the front end of the second gear 24. A rear mounting plate 27 is fixedly connected to the middle of the outer surface of the fixed shaft 25. Screws 28 are fixedly connected to the four sides of the front end of the rear mounting plate 27. The main body component 26 is sleeved on the front surface of the outer surface of the rear mounting plate 27. The front surface of the screws 28 is threaded with screws. The front mounting plate 210 is sleeved on the front of the outer surface of the female 29 and the fixed shaft 25. The front mounting plate 210 has mounting holes 211 on all four sides of its front end. The drive motor 21 is fixedly connected to the rear left side of the fixed plate 6. The main body component 26 includes a rocker arm 261 and a cylinder 267. The upper front end of the rocker arm 261 is movably connected to a connecting shaft 262 via a bearing. A movable plate 263 is fixedly connected to the outer surface of the connecting shaft 262. A base plate 266 is fixedly connected to the lower end of the movable plate 263. The output end of the cylinder 267 passes through the base plate 266 and is fixedly connected to a suction device. The lower front end of the disc 268 and the rocker arm 261 has mounting holes 265 and mounting grooves 264, respectively. There are four mounting holes 265, which are located around the outer perimeter of the mounting grooves 264. The rocker arm 261 is sleeved on the outer surface of the fixed shaft 25. The rear end of the second gear 24 is movably connected to the front right side of the fixed plate 6 via a rotating shaft. The first gear 22 and the second gear 24 are distributed with the left side lower than the right side. The fixed shaft 25 passes through the front end of the L-shaped mounting back plate 1 and is located directly above the long limiting plate 3. The positions of the four screws 28 are as follows. The dimensions of the mounting holes 211 correspond one-to-one. The rear mounting plate 27 and the front mounting plate 210 are set parallel to each other, and the distance between the rear mounting plate 27 and the front mounting plate 210 is equal to the thickness of the rocker arm 261. After the nut 29 is tightened, it fits tightly against the front end face of the front mounting plate 210. The movable plate 263 and the base plate 266 are connected at a 90-degree angle. The movable plate 263 is vertically slidably connected in the limiting groove 10. The dimensions of the four mounting holes 265 correspond one-to-one with the dimensions of the screw 28. The cylinder 267 is connected to an external air source through an air pipe.

[0031] Through the above scheme: the swing mechanism 2 of the swing arm joint angle adjustment mechanism uses the drive motor 21 fixedly connected to the left rear end of the fixed plate 6 as the power source. Its output end passes through the fixed plate 6 and drives the fixedly connected first leather gear 22 to rotate. The first leather gear 22 is connected to the second leather gear 24, which is movably connected to the right front end of the fixed plate 6 through the rear end via the synchronous toothed belt 23 and is distributed with the left side lower and the right side higher. This drives the fixed shaft column 25 fixedly connected to the middle of the front end of the second leather gear 24 to rotate through the front end of the L-shaped mounting back plate 1 and located directly above the long limit plate 3. The rear mounting plate 27 fixed in the middle of the outer surface of the fixed shaft column 25 and the screws 28 fixed around its front end rotate synchronously. When rotated, the screw 28 passes through the four mounting holes 265 at the lower front end of the rocker arm 261, which are located around the outer perimeter of the mounting groove 264 and correspond one-to-one with the position and size of the screw 28. The mounting holes 211 around the front perimeter of the front mounting plate 210, which is fitted onto the outer surface of the fixed shaft 25, also correspond one-to-one with the position and size of the screw 28. After being tightened by the threaded nut 29, the nut fits tightly against the front surface of the front mounting plate 210, clamping the rocker arm 261 between the parallel rear mounting plate 27 and the front mounting plate 210, whose spacing is equal to the thickness of the rocker arm 261. This causes the rocker arm 261 to swing synchronously with the fixed shaft 25. To achieve angle adjustment of the swing arm, the upper front end of the swing arm 261 is movably connected to the connecting shaft 262 via a bearing, and the movable plate 263 fixed to the outer surface is vertically connected to the lower fixed base plate 266 at a 90-degree angle. It slides vertically within the limiting groove 10. As the swing arm 261 swings, it drives the slider 4 to slide along the long limiting plate 3, improving swing stability. The cylinder 267 on the base plate 266 is connected to an external air source via an air pipe. Its output end passes through the base plate 266, driving the suction cup 268 to extend and retract, thus completing the gripping action in conjunction with angle adjustment. The drive motor 21 provides stable power, and the transmission structure of the first gear 22, the synchronous toothed belt 23, and the second gear 24 ensures efficient power transmission. Furthermore, the left-low, right-high distribution optimizes space utilization. The fixed shaft column 25 transmits power to the swing arm 261. The combination of the rear mounting plate 27, screw 28, front mounting plate 210, and nut 29 ensures that the swing arm 261 is stably installed and easy to disassemble and replace. The cooperation between the movable plate 263 and the limiting groove 10 restricts the swing trajectory of the swing arm 261. The cylinder 267 and suction cup 268 expand the function of the mechanism. The beneficial effect of this solution is that the swing mechanism 2 achieves precise adjustment of the swing arm angle through the transmission of gears and synchronous toothed belts 23. All components are firmly connected and easy to install and disassemble. The cooperation between the movable plate 263 and the limiting groove 10 improves the stability and reliability of the swing process.

[0032] It should be noted that this utility model is a swing arm joint angle adjustment mechanism. When the swing arm joint angle adjustment mechanism is working, the power supply box 7, which is fixedly connected to the upper rear part of the L-shaped mounting back plate 1 and located behind the fixed plate 6, is arranged along the rear edge of the fixed plate 6 by wires and fixed by buckles. The output voltage of the power supply box 7 matches the rated voltage of the drive motor 21, which supplies power to the drive motor 21 in the swing mechanism 2 fixedly connected to the left rear end of the fixed plate 6. After the drive motor 21 starts, its output end passes through the fixed plate 6 and drives the fixedly connected leather gear 22 to rotate. Since the leather gear 22 is movably connected to the rear end of the fixed plate 6 via a rotating shaft through a synchronous toothed belt 23, and is distributed with the leather gear 22 at a left-low and right-high ratio, the leather gear 22 is also connected to the rear end of the fixed plate 6 via a synchronous toothed belt 23. Gear 24 is connected to the transmission, so the first gear 22 will drive the second gear 24 to rotate synchronously through the synchronous toothed belt 23. This causes the fixed shaft 25, which is fixedly connected to the middle of the front end of the second gear 24, to rotate as well. The fixed shaft 25 passes through the front end of the L-shaped mounting back plate 1 and is located directly above the long limiting plate 3. When the fixed shaft 25 rotates, the rear mounting plate 27, which is fixedly connected to the middle of its outer surface, and the front mounting plate 210, which is sleeved on the front of its outer surface, also rotate synchronously. Since the position dimensions of the four screws 28 fixedly connected to the front periphery of the rear mounting plate 27 correspond one-to-one with the position dimensions of the mounting holes 211 opened around the front periphery of the front periphery of the front mounting plate 210, and the rear mounting plate 27 and the front mounting plate 210 are set parallel to each other with a spacing equal to the thickness of the rocker arm 261, Meanwhile, after the nut 29, which is threaded to the front of the outer surface of the screw 28, is tightened, it fits tightly against the front end face of the front mounting plate 210. The rocker arm 261, which is sleeved on the outer surface of the main body assembly 26 of the fixed shaft column 25, is clamped between the rear mounting plate 27 and the front mounting plate 210 through four mounting holes 265 located around the outer perimeter of the mounting groove 264 and whose position and size correspond one-to-one with the position and size of the screw 28. Therefore, the fixed shaft column 25 will drive the rocker arm 261 to swing synchronously, realizing the angle adjustment of the rocker arm joint. During the swinging process of the rocker arm 261, the movable plate 263, which is fixedly connected to the outer surface of the connecting shaft 262 through the bearing at the upper front end, will move accordingly. Since the movable plate 263 is vertically slidingly connected... Within the limiting groove 10 opened at the upper middle of the limiting block 5, and with the limiting block 5 fixedly connected to the opposite faces of the two side blocks 8, the side blocks 8 are fixedly connected to the middle of the front end of the slider 4 by bolts. The slider 4 is slidably connected to the long limiting plate 3 fixedly connected to the middle of the front end of the L-shaped mounting back plate 1 through the sliding groove 9 opened at the rear end. The cross-sectional shape of the sliding groove 9 matches the cross-sectional shape of the long limiting plate 3. The left cross-section of the long limiting plate 3 has an I-shaped structure. At the same time, the movable plate 263 is perpendicularly connected to the bottom plate 266 fixedly connected at the lower end at a 90-degree angle. Therefore, under the constraint of the limiting groove 10, the movable plate 263 will drive the slider 4 to slide along the long limiting plate 3, which plays a guiding and limiting role in the swing of the rocker arm 261. In addition, the cylinder 267 installed on the bottom plate 266 is connected to an external air source through an air pipe.Its output end penetrates the base plate 266 and drives the fixedly connected suction cup component 268 to extend and retract, which can be used in conjunction with the angle adjustment of the swing arm joint to complete the grasping or placing action, ultimately achieving stable operation of the entire swing arm joint angle adjustment mechanism.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A swing arm joint angle adjustment mechanism, characterized in that: The device includes an L-shaped mounting backplate (1), a long limiting plate (3) is fixedly connected to the middle of the front end of the L-shaped mounting backplate (1), a fixing plate (6) is fixedly connected to the middle of the upper end of the L-shaped mounting backplate (1), a power box (7) is fixedly connected to the rear of the upper end of the L-shaped mounting backplate (1), and the power box (7) is located behind the fixing plate (6). A swing mechanism (2) is fixedly connected to the left rear end of the fixing plate (6). A slider (4) is slidably connected to the outer side of the long limiting plate (3). A sliding groove (9) is opened at the rear end of the slider (4). A side block (8) is fixedly connected to the middle of the front end of the slider (4) by bolts. There are two side blocks (8). The opposite surfaces of the two side blocks (8) are fixedly connected to a limiting block (5). A through limiting groove (10) is opened at the middle of the upper end of the limiting block (5).

2. The swing arm joint angle adjustment mechanism according to claim 1, characterized in that: The swing mechanism (2) includes a drive motor (21) and a synchronous toothed belt (23). The output end of the drive motor (21) passes through the fixed plate (6) and is fixedly connected to a first leather gear (22). The first leather gear (22) is connected to a second leather gear (24) via the synchronous toothed belt (23). A fixed shaft column (25) is fixedly connected to the middle of the front end of the second leather gear (24). A rear mounting plate (27) is fixedly connected to the middle of the outer surface of the fixed shaft column (25). Screws (28) are fixedly connected to the front end of the rear mounting plate (27). A main body component (26) is sleeved on the front surface of the rear mounting plate (27). Nuts (29) are threaded on the front surface of the screws (28). A front mounting plate (210) is sleeved on the front surface of the fixed shaft column (25). A mounting hole (211) is opened on the front end of the front end of the front mounting plate (210). The drive motor (21) is fixedly connected to the left rear end of the fixed plate (6).

3. The swing arm joint angle adjustment mechanism according to claim 2, characterized in that: The main component (26) includes a rocker arm (261) and a cylinder (267). The upper front end of the rocker arm (261) is movably connected to a connecting shaft (262) via a bearing. A movable plate (263) is fixedly connected to the outer surface of the connecting shaft (262). A base plate (266) is fixedly connected to the lower end of the movable plate (263). The output end of the cylinder (267) passes through the base plate (266) and is fixedly connected to a suction cup (268). The lower front end of the rocker arm (261) has two mounting holes (265) and a mounting groove (264). There are four mounting holes (265), and the mounting holes (265) are located around the outer perimeter of the mounting groove (264). The rocker arm (261) is sleeved on the outer surface of the fixed shaft (25).

4. The swing arm joint angle adjustment mechanism according to claim 2, characterized in that: The rear end of the second leather gear (24) is movably connected to the front right side of the fixed plate (6) via a rotating shaft. The first leather gear (22) and the second leather gear (24) are distributed with the left side lower than the right side. The fixed shaft column (25) passes through the front end of the L-shaped mounting back plate (1) and the fixed shaft column (25) is located directly above the long limiting plate (3).

5. The swing arm joint angle adjustment mechanism according to claim 2, characterized in that: The positional dimensions of the four screws (28) correspond one-to-one with the positional dimensions of the mounting hole (211). The rear mounting plate (27) and the front mounting plate (210) are arranged parallel to each other, and the distance between the rear mounting plate (27) and the front mounting plate (210) is equal to the thickness of the rocker arm (261). After the nut (29) is tightened, it fits tightly against the front end face of the front mounting plate (210).

6. The swing arm joint angle adjustment mechanism according to claim 3, characterized in that: The movable plate (263) is vertically connected to the base plate (266) at a 90-degree angle. The movable plate (263) is vertically slidably connected in the limiting groove (10). The position dimensions of the four mounting holes (265) correspond one-to-one with the position dimensions of the screw (28). The cylinder (267) is connected to an external air source through an air pipe.

7. The swing arm joint angle adjustment mechanism according to claim 1, characterized in that: The left cross section of the long limiting plate (3) is I-shaped. The slider (4) is slidably connected to the long limiting plate (3) through the slide groove (9). The cross-sectional shape of the slide groove (9) matches the cross-sectional shape of the long limiting plate (3).

8. The swing arm joint angle adjustment mechanism according to claim 1, characterized in that: The power supply box (7) is electrically connected to the drive motor (21) via wires. The wires are arranged along the rear edge of the fixing plate (6) and fixed by buckles. The output voltage of the power supply box (7) matches the rated voltage of the drive motor (21).

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