Mechanical arm base with variable machining angle

Abstract

The invention relates to the technical field of mechanical arm bases, and discloses a machining-angle-variable mechanical arm base which comprises a mounting base, an adjusting assembly and a mounting disc, the top end of the mounting base is fixedly connected with a height limiting cylinder, the top end of the height limiting cylinder is movably connected with the mounting disc through the adjusting assembly, and the bottom end of the mounting disc is fixedly connected with a connecting roller; a first connecting rod is fixedly connected to the top end of the connecting roller, sleeves are fixedly connected to the front side and the rear side of the bottom end of the first connecting rod, second connecting rods are fixedly connected to the exteriors of the sleeves, and third connecting rods are rotationally connected to the middles of the sleeves. According to the mechanical arm, intelligent lifting and multi-angle adjustment of the mounting disc are achieved, the working space of the mechanical arm is effectively enlarged, working errors are reduced, the height position of the mounting disc can be locked, vertical displacement interference is eliminated, posture deviation caused by vibration or external force is avoided, and the operation precision of the mechanical arm is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of robotic arm bases, and particularly to a robotic arm base with a variable machining angle. Background Art

[0002] At present, with the booming development of the intelligent manufacturing equipment industry, the robotic arm, as a key device, refers to a complex system with high precision, multiple inputs and outputs, high nonlinearity, and strong coupling. Due to its unique operation flexibility, it is widely used in industrial assembly, safety explosion protection and other fields. For the intelligent manufacturing equipment industry, this complex system of robotic arms has uncertainties such as parameter perturbations, external interferences, and unmodeled dynamics, so its modeling model also has uncertainties. In view of this, in the diverse production scenarios of the intelligent manufacturing equipment industry, for different tasks, it is necessary to accurately plan the motion trajectory of the robotic arm joint space to ensure its efficient and stable operation in the industry and meet the high requirements of the intelligent manufacturing equipment industry for production precision and efficiency.

[0003] In the field of the intelligent manufacturing equipment industry, the installation process of the robotic arm must be realized with the help of a corresponding base. The deflection action of the robotic arm depends on the driving mechanism of the base. Its working principle is to control the motor that drives the deflection of the robotic arm through programming instructions, and then use the output shaft of the motor to adjust the rotation angle of the robotic arm. However, in the actual working scenario, when the robotic arm holds a heavy object for operation, according to its specification characteristics, there is an easy deviation between the actual rotation angle and the set angle of the driving motor. In addition, the harsh working environment in some machining workshops causes impurities to easily invade the interior of the robotic arm base, which will also interfere with the normal operation of the robotic arm, resulting in a deviation of the rotation angle. Therefore, in view of the above problems, a robotic arm base with a variable machining angle is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a robotic arm base with a variable machining angle to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides: a robotic arm base with a variable machining angle, including a mounting base, an adjusting assembly, and a mounting disc. A height limiting cylinder is fixedly connected to the top end of the mounting base. The top end of the height limiting cylinder is movably connected to the mounting disc through the adjusting assembly. A connecting roller is fixedly connected to the bottom end of the mounting disc. A first connecting rod is fixedly connected to the top end of the connecting roller. Sleeve tubes are fixedly connected to both the front and rear sides of the bottom end of the first connecting rod. Sleeve tubes are fixedly connected to both the front and rear sides of the bottom end of the first connecting rod. A second connecting rod is fixedly connected to the outside of the sleeve tube. A third connecting rod is rotatably connected to the middle of the sleeve tube. Fourth connecting rods are rotatably connected to the left and right ends of the third connecting rod. A limiting assembly for adjusting the height of the mounting disc is arranged inside the height limiting cylinder;

[0006] Preferably, a first positioning block is fixedly connected to the middle of the left side of the second connecting rod, and a second positioning block is fixedly connected to the front side of the second connecting rod. The top end of the first lifting electric cylinder is movably connected to the middle of the first positioning block, and the top end of the second lifting electric cylinder is movably connected to the middle of the second positioning block;

[0007] Preferably, the limiting assembly includes a stress rod. The outer part of the stress rod is slidably connected to the middle of the top end of the height limiting cylinder. The top end of the stress rod is fixedly connected with an intelligent flexible joint. The top end of the intelligent flexible joint is movably connected to the bottom end of the fourth connecting rod. The bottom end of the stress rod is fixedly connected with a piston plate. Grooves are formed in the middle of the left and right sides of the piston plate. A frame rod is slidably connected to the inside of the groove. A fixed ball is fixedly connected to the top end inside the frame rod. A first spring is fixedly connected to the bottom end inside the groove. The bottom end of the first spring is fixedly connected to the bottom end inside the frame rod;

[0008] Preferably, a clamping member is slidably connected to the inside of the groove. The inside of the frame rod is slidably connected to the outside of the clamping member. A clamping head is arranged on one side of the clamping member away from the piston plate. A clamping hole is formed in the top end of the clamping member, and a limiting groove is formed in the middle of the clamping member;

[0009] Preferably, a second spring is fixedly connected to one side of the inside of the groove close to the stress rod. The end of the second spring away from the stress rod is fixedly connected to the inner wall of the limiting groove;

[0010] Preferably, supporting plates are fixedly connected to the left and right sides inside the height limiting cylinder. Positioning holes are formed in the adjacent sides of the adjacent supporting plates. The outside of the piston plate is slidably connected to the inner wall of the height limiting cylinder, and the outside of the piston plate is slidably connected to the adjacent side of the adjacent supporting plate;

[0011] Preferably, a baffle is fixedly connected to the top end of the supporting plate. The outside of the clamping head is engaged with the inner wall of the positioning hole.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. In the present invention, by controlling the first lifting electric cylinder and the second lifting electric cylinder to drive the stress rod and the piston plate to expand and contract synchronously, and in cooperation with the first lifting electric cylinder and the second lifting electric cylinder independently driving the expansion and contraction to drive the connecting roller to rotate around different components, the intelligent lifting and multi-angle adjustment of the mounting plate are realized, the working space range and the applicable range of the robotic arm are expanded, and the working error of the robotic arm is reduced.

[0014] 2. In the present invention, the height of the mounting plate is locked by engaging the chuck with positioning holes at different positions through the lifting of the piston plate. When lowering the mounting plate, the clamping member retracts into the groove under the extrusion of the inclined surface of the supporting plate, and the fixing ball engages with the clamping hole at the top of the clamping member so that the piston plate can slide down. After the piston plate reaches the bottom end, it continues to descend until the fixing ball unlocks from the clamping hole, and the clamping member pops out under the elastic force of the second spring and engages with the positioning hole, realizing the locking of the height position of the mounting plate, eliminating the displacement interference in the vertical direction, avoiding the attitude deviation of the robotic arm due to vibration or external force, and ensuring the operation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the third connecting rod, the connecting roller and the sleeve of the present invention;

[0017] Figure 3 is a schematic diagram of the structure of the connecting roller, the first positioning block and the second positioning block of the present invention;

[0018] Figure 4 is a schematic diagram of the structure of the height-limiting cylinder and the connecting roller of the present invention;

[0019] Figure 5 is a schematic diagram of the structure of the supporting plate and the baffle of the present invention;

[0020] Figure 6 is a schematic diagram of the structural cooperation of the frame rod, the clamping member and the chuck of the present invention;

[0021] Figure 7 is a split schematic diagram of the groove and its internal structure of the present invention;

[0022] Figure 8 This Figure 4 is an enlarged view of part A in the present invention.

[0023] Legend:

[0024] 1. Base; 2. Height-limiting cylinder; 3. Mounting plate; 4. Connecting roller; 5. First connecting rod; 6. Sleeve; 7. Second connecting rod; 8. Third connecting rod; 9. Fourth connecting rod; 10. First positioning block; 11. First lifting electric cylinder; 12. Second positioning block; 13. Second lifting electric cylinder; 14. Intelligent flexible joint; 15. Force-bearing rod; 16. Piston plate; 17. Groove; 18. Frame rod; 19. Fixing ball; 20. First spring; 21. Clamping member; 22. Chuck; 23. Clamping hole; 24. Limiting groove; 25. Second spring; 26. Supporting plate; 27. Positioning hole; 28. Baffle. DETAILED DESCRIPTION OF THE INVENTION

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Referring to Figures 1 to 3 , an embodiment provided by the present invention: a robotic arm base with variable processing angles, including a mounting base 1, an adjustment component, and a mounting disc 3. Holes are provided at the four corners of the mounting base 1 for the convenient fixed installation of the mounting base 1. A height-limiting cylinder 2 is fixedly connected to the top end of the mounting base 1, and the height-limiting cylinder 2 is located in the middle of the top end of the mounting base 1 for limiting and adjusting the height of the mounting disc 3.

[0027] Refer to Figure 1 , the top end of the height-limiting cylinder 2 is movably connected to the mounting disc 3 through an adjustment component, and the adjustment component is used to adjust the angle of the mounting disc 3. A connecting roller 4 is fixedly connected to the bottom end of the mounting disc 3, and the connecting roller 4 is connected to the middle of the bottom end of the mounting disc 3 by welding to further raise the height of the mounting disc 3 for the user. A first connecting rod 5 is fixedly connected to the top end of the connecting roller 4, and sleeves 6 are fixedly connected to the front and rear sides of the bottom end of the first connecting rod 5. The first connecting rod 5 is U-shaped and is longitudinally connected to the second connecting rod 7 through the sleeves 6.

[0028] Refer to Figure 2 , Figure 3 and Figure 4 , a second connecting rod 7 is fixedly connected to the outside of the sleeve 6. The second connecting rod 7 connects the sleeve 6 and the mounting disc 3. When the sleeve 6 expands and contracts, it drives the mounting disc 3 to undergo a lateral angle change. A third connecting rod 8 is rotatably connected to the middle of the sleeve 6. During the height adjustment process of the mounting disc 3, the third connecting rod 8 works in cooperation with the sleeve 6 to transmit the movement of the sleeve 6 to the fourth connecting rod 9; when the angle of the mounting disc 3 is adjusted, the expansion and contraction of the third connecting rod 8 will drive itself and the second connecting rod 7 together to undergo a longitudinal angle change centered on the intelligent flexible joint 14, thereby realizing the longitudinal angle adjustment of the mounting disc 3.

[0029] Refer to Figure 5 , Figure 6, the left and right ends of the third link 8 are rotatably connected to the fourth link 9. The third link 8 is composed of the intersection of a transverse short rod and a longitudinal long rod. The longitudinal long rod rotates inside the sleeve 6. The fourth link 9 is a U-shaped rod with welding rings at both sides. The left and right position rods of the third link 8 are rotatably connected inside the rings. The adjustment includes a first lifting electric cylinder 11. The top of the mounting seat 1 is movably connected to the first lifting electric cylinder 11. The top of the mounting seat 1 is movably connected with a second lifting electric cylinder 13. A first positioning block 10 is fixedly connected to the middle of the left side of the second link 7. A second positioning block 12 is fixedly connected to the front side of the second link 7. The top of the first lifting electric cylinder 11 is movably connected to the middle of the first positioning block 10. The top of the second lifting electric cylinder 13 is movably connected to the middle of the second positioning block 12. The first lifting electric cylinder 11 and the second lifting electric cylinder 13 serve as power sources. Respectively, through the connection of the top with the first positioning block 10 and the second positioning block 12, they drive the second link 7 and the third link 8 to perform telescopic movements, thereby realizing the angle adjustment of the mounting plate 3. The first lifting electric cylinder 11 is mainly responsible for the horizontal angle adjustment of the mounting plate 3, and the second lifting electric cylinder 13 is mainly responsible for the vertical angle adjustment of the mounting plate 3.

[0030] A limiting component for adjusting the height of the mounting plate 3 is arranged inside the height-limiting cylinder 2. The limiting component includes a force-bearing rod 15. The outside of the force-bearing rod 15 is slidably connected to the middle of the top of the height-limiting cylinder 2. The force-bearing rod 15 is the main component for transmitting power and bearing force. Its outside is slidably connected to the middle of the top of the height-limiting cylinder 2. Under the action of the fourth link 9, it can slide up and down inside the height-limiting cylinder 2, thereby realizing the height adjustment of the mounting plate 3. The top of the force-bearing rod 15 is fixedly connected with an intelligent flexible joint 14. The top of the intelligent flexible joint 14 is movably connected to the bottom end of the fourth link 9. The intelligent flexible joint 14 connects the force-bearing rod 15 and the fourth link 9, allowing the force-bearing rod 15 to swing at a certain angle in different directions, making the mounting plate 3 more flexible when adjusting the angle, and realizing the key connection function for the multi-angle adjustment of the mounting plate 3.

[0031] The bottom end of the force-bearing rod 15 is fixedly connected with a piston plate 16. The outside of the piston plate 16 is slidably connected to the inner wall of the height-limiting cylinder 2. The piston plate 16 slides inside the height-limiting cylinder 2 driven by the force-bearing rod 15. Grooves 17 are respectively arranged in the middle of the left and right sides of the piston plate 16. There are two grooves 17, which are respectively on both sides of the piston plate 16 and are composed of an up-and-down through groove and a one-side through groove. A frame rod 18 is slidably connected inside the groove 17. During the downward movement of the piston plate 16, the fixed ball 19 inside the frame rod 18 is engaged with the card hole 23 at the top of the card member 21, enabling the piston plate 16 to descend.

[0032] A fixed ball 19 is fixedly connected to the inner top end of the frame rod 18. After the piston plate 16 descends to the bottom end of the height-limiting cylinder 2, under the action of the first spring 20, the fixed ball 19 is unlocked from the card hole 23, thereby realizing the control of the descending process of the piston plate 16. The bottom end of the inner part of the groove 17 is fixedly connected with the first spring 20. The bottom end of the first spring 20 is fixedly connected to the inner bottom end of the frame rod 18 and is installed between the inner bottom end of the groove 17 and the inner bottom end of the frame rod 18. When the piston plate 16 descends to the bottom end of the height-limiting cylinder 2, it is squeezed by the frame rod 18 and stores elastic potential energy. When the frame rod 18 is acted upon by other forces, the first spring 20 releases the elastic potential energy and pushes the fixed ball 19 to unlock from the card hole 23 of the card member 21, realizing the control of the descending state of the piston plate 16.

[0033] Reference Figure 6 、 Figure 8 A card member 21 is slidably connected to the inner part of the groove 17. In the initial state, the card member 21 protrudes from the inner wall of the groove 17 so that the card member 21 can be engaged with the positioning hole 27. The inner part of the frame rod 18 is slidably connected to the outside of the card member 21. The frame rod 18 is sleeved outside the card member 21 without affecting the movement of the card member 21. A card head 22 is arranged on the side of the card member 21 away from the piston plate 16. The card head 22 has a shape with a sloped top surface and a flat bottom surface, which is for better locking the height position of the mounting plate 3.

[0034] A card hole 23 is opened at the top end of the card member 21. During the descending process of the piston plate 16, it is engaged with the fixed ball 19 inside the frame rod 18, enabling the piston plate 16 to descend smoothly. After the piston plate 16 descends to the bottom end of the height-limiting cylinder 2, under the action of the first spring 20, the fixed ball 19 is unlocked from the card hole 23. A limiting groove 24 is opened in the middle of the card member 21. A second spring 25 is fixedly connected to the inner part of the groove 17 near the force-bearing rod 15. The end of the second spring 25 away from the force-bearing rod 15 is fixedly connected to the inner wall of the limiting groove 24, providing an installation position for the second spring 25 and at the same time restricting the movement range of the second spring 25 to ensure that the second spring 25 can stably act on the card member 21, enabling the card member 21 to accurately pop out of the groove 17 and be engaged with the positioning hole 27 under the elastic force of the second spring 25.

[0035] On both the left and right sides inside the height-limiting cylinder 2, there are fixedly connected support plates 26. One is to provide a moving track and positioning holes 27 for the clamping heads 22 of the clamping members 21, enabling the clamping heads 22 to extend and retract on their surfaces and engage with the positioning holes 27 at different positions, thus achieving the locking of the height of the mounting plate 3. The other is that the cross-section of its top end fits with the cross-section of the bottom end of the positioning hole 27, further ensuring the stability of the mounting plate 3 when the height is locked. On the adjacent side of the adjacent support plates 26, there are positioning holes 27, and the outer part of the clamping head 22 engages with the inner wall of the positioning hole 27, cooperating with the clamping head 22 of the clamping member 21 to achieve the locking of the height of the mounting plate 3. The positioning holes 27 at different positions correspond to different height positions of the mounting plate 3. Through the engagement of the clamping head 22 with the positioning hole 27, the mounting plate 3 can stay stably at multiple height positions.

[0036] The outer part of the piston plate 16 is slidably connected to the adjacent side of the adjacent support plate 26. A baffle 28 is fixedly connected to the top end of the support plate 26. During the downward movement of the piston plate 16, its inclined surface presses the clamping member 21, causing the clamping member 21 to retract into the groove 17. At the same time, when the clamping member 21 retracts to a certain position, the inclined surface of its top end aligns with the inclined surface of the baffle 28. In the case where the fixed ball 19 engages with the clamping hole 23, it ensures that the piston plate 16 can smoothly descend.

[0037] Working principle: When in use, the user first installs the mounting base 1 at a preset fixed position, and then starts the first lifting electric cylinder 11 and the second lifting electric cylinder 13 through an external control panel. Due to the connection of the first positioning block 10 and the second positioning block 12, and the coordinated movement of the second connecting rod 7, the third connecting rod 8, and the fourth connecting rod 9, the fourth connecting rod 9 pulls the stress rod 15 and the piston plate 16 to slide and rise inside the height-limiting cylinder 2 through the intelligent flexible joint 14, thereby achieving precise adjustment of the height of the mounting plate 3. In addition, when the mounting plate 3 is lifted or lowered to a suitable position, the user can adjust the angle according to the needs and respectively control the first lifting electric cylinder 11 and the second lifting electric cylinder 13 to extend and retract: The first lifting electric cylinder 11 drives the second connecting rod 7 to rotate around the sleeve 6, driving the mounting plate 3 to undergo a horizontal angular change; the second lifting electric cylinder 13 drives the third connecting rod 8 and the second connecting rod 7 to undergo a vertical angular change around the intelligent flexible joint 14, achieving multi-dimensional attitude adjustment of the mounting plate 3 until its levelness meets the requirements. Finally, the mounting plate 3 is connected to the manipulator through fixing bolts, which not only facilitates the user to install the manipulator but also supports dynamically adjusting the angle and height of the mounting plate 3 when using the robotic arm, thereby reducing the motion trajectory deviation and picking dead angle of the robotic arm.

[0038] During the lifting and lowering movement of the piston plate 16, it drives the chuck 22 of the clamping member 21 to expand and contract along the surface of the supporting plate 26 and engage with the positioning holes 27 at different positions. Through the fitting of the top cross-section of the supporting plate 26 and the bottom cross-section of the positioning hole 27, the rigid locking of the lifting height of the mounting plate 3 is achieved. When it is necessary to lower the mounting plate 3, the clamping member 21 is repeatedly retracted into the groove 17 under the extrusion of the inclined surface of the supporting plate 26 until the inclined surface at its top aligns with the inclined surface of the baffle 28. At this time, the clamping member 21 is completely retracted under the extrusion of the inclined surface of the extended baffle 28, and the fixed ball 19 in the frame rod 18 then engages with the clamping hole 23 at the top of the clamping member 21, allowing the piston plate 16 to slide down in the height-limiting cylinder 2. When the piston plate 16 descends to the bottom end of the height-limiting cylinder 2, its continuous descending action will squeeze the first spring 20, causing the fixed ball 19 to be unlocked from the clamping hole 23. Subsequently, under the elastic force of the second spring 25, the clamping member 21 pops out of the groove 17 and engages with the positioning hole 27, locking the height of the mounting plate 3 again. This adaptive locking mechanism effectively reduces the number of equipment failures and improves the operational reliability of the equipment through an intelligent reset design.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical arm base with a variable processing angle, comprising a mounting base (1), an adjustment component and a mounting plate (3), characterized in that: The top end of the mounting seat (1) is fixedly connected to the height limiting cylinder (2), the top end of the height limiting cylinder (2) is movably connected to the mounting plate (3) through an adjustment component, the bottom end of the mounting plate (3) is fixedly connected to a connecting roller (4), the top end of the connecting roller (4) is fixedly connected to a first connecting rod (5), the bottom end of the first connecting rod (5) is fixedly connected to sleeves (6) on both the front and rear sides, the outside of the sleeve (6) is fixedly connected to a second connecting rod (7), the middle part of the sleeve (6) is rotatably connected to a third connecting rod (8), the left and right ends of the third connecting rod (8) are rotatably connected to fourth connecting rods (9), and a limiting component for adjusting the height of the mounting plate (3) is arranged inside the height limiting cylinder (2).

2. The robot arm base with variable processing angle according to claim 1, characterized in that: The adjustment comprises a first lifting electric cylinder (11), the top end of the mounting seat (1) is movably connected to the first lifting electric cylinder (11), and the top end of the mounting seat (1) is movably connected to a second lifting electric cylinder (13).

3. The robot arm base with variable processing angle according to claim 2, characterized in that: A positioning block 1 (10) is fixedly connected to the middle part of the left side of the second connecting rod (7), a positioning block 2 (12) is fixedly connected to the front side of the second connecting rod (7), the top end of the first lifting electric cylinder (11) is movably connected to the middle part of the positioning block 1 (10), and the top end of the second lifting electric cylinder (13) is movably connected to the middle part of the positioning block 2 (12).

4. The robot arm base with variable processing angle according to claim 2, characterized in that: The limiting assembly comprises a force-bearing rod (15), the outer portion of the force-bearing rod (15) is slidably connected to the middle portion of the top end of the height-limiting cylinder (2), the top end of the force-bearing rod (15) is fixedly connected to an intelligent flexible joint (14), the top end of the intelligent flexible joint (14) is movably connected to the bottom end of the fourth connecting rod (9), the bottom end of the force-bearing rod (15) is fixedly connected to a piston plate (16), the middle portions of the left and right sides of the piston plate (16) are provided with grooves (17), the inside of the groove (17) is slidably connected to a frame rod (18), the inner top end of the frame rod (18) is fixedly connected to a fixed ball (19), the inner bottom end of the groove (17) is fixedly connected to a spring 1 (20), and the bottom end of the spring 1 (20) is fixedly connected to the inner bottom end of the frame rod (18).

5. The mechanical arm base with variable processing angle according to claim 4, characterized in that: The interior of the groove (17) is slidably connected to a clamping member (21), the interior of the frame rod (18) is slidably connected to the exterior of the clamping member (21), a clamping head (22) is provided on the side of the clamping member (21) away from the piston plate (16), a clamping hole (23) is provided at the top of the clamping member (21), and a limiting groove (24) is provided in the middle of the clamping member (21).

6. The mechanical arm base with variable processing angle according to claim 5, characterized in that: A second spring (25) is fixedly connected to one side of the groove (17) close to the force-bearing rod (15), and one end of the second spring (25) away from the force-bearing rod (15) is fixedly connected to the inner wall of the limiting groove (24).

7. The mechanical arm base with variable processing angle according to claim 4, characterized in that: The left and right sides of the interior of the height limiting cylinder (2) are fixedly connected with supporting plates (26), and the adjacent sides of the adjacent supporting plates (26) are provided with positioning holes (27). The outside of the piston plate (16) is slidably connected to the inner wall of the height limiting cylinder (2), and the outside of the piston plate (16) is slidably connected to the adjacent sides of the supporting plates (26).

8. The mechanical arm base with variable processing angle according to claim 6, characterized in that: The top end of the supporting plate (26) is fixedly connected with a baffle (28), and the outside of the clamping head (22) is clamped with the inner wall of the positioning hole (27).

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