A mechanical arm structure for welding robot

Abstract

The present invention relates to the technical field of mechanical arm structures, specifically to a mechanical arm structure for a welding robot, mainly comprising a base, a turntable rotatably mounted on the top surface of the base, a large arm rotatably mounted on the top surface of the turntable through a joint, a protective mechanism, the protective mechanism is arranged on one side of the large arm, the protective mechanism includes a protective frame located on one side of the large arm, and a limiting mechanism, the limiting mechanism is arranged inside the protective frame. By rotating the forearm and the welding gun into the protective frame, turning on the electric push rod, the electric push rod drives the T-shaped block three to move, the T-shaped block three drives the two connecting rods to move, the connecting rod drives the hinge block to rotate, the hinge block drives the adjustment plate to rotate, the adjustment plate drives the protective cover and the reinforcement rod to rotate, when the two adjustment plates are in contact, the two protective covers shield the protective frame, thereby protecting the forearm and the welding gun inside the protective frame, making the forearm and the welding gun less likely to be damaged by collision with workers, thereby increasing the service life of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical arm structures, in particular to a mechanical arm structure for a welding robot. Background Art

[0002] Welding is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. With the development of automation and mechanical design technology, as well as the high attention paid to welding quality, the application ratio of automatic welding equipment in various industrial sectors is getting higher and higher. As automatic welding equipment, welding robots usually include two parts: a mechanical arm and welding equipment. However, the mechanical arms of welding robots in the prior art are mostly designed with fixed degrees of freedom, which limits the flexibility and scalability of the use of welding robots.

[0003] The Chinese patent publication number CN221736192U discloses a mechanical arm structure for a welding robot, in which a receiving groove is provided in the forearm of the mechanical arm, and the auxiliary arm is accommodated by the receiving groove, and the auxiliary arm can be connected to the mechanical arm system when needed to improve the joint freedom of the mechanical arm, thereby improving the freedom and convenience of the welding robot operation.

[0004] However, after the device completes the welding operation, the welding gun and the forearm of the robotic arm will be directly exposed to the outside and in an unprotected state. When workers walk in the workshop, if they accidentally touch these exposed parts, it may not only cause the position of the welding gun or the forearm of the robotic arm to shift, affecting the accuracy and efficiency of subsequent work, but may also cause more serious physical damage, thereby shortening the overall service life of the equipment. Summary of the invention

[0005] The object of the present invention is to provide a mechanical arm structure for a welding robot to solve the problems raised by the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A mechanical arm structure for a welding robot, comprising: a base, a turntable is rotatably mounted on the top surface of the base, a large arm is rotatably mounted on the top surface of the turntable through a first joint, a small arm is rotatably mounted on the upper end of the large arm through a second joint, a rotating block is rotatably mounted on one end of the small arm, and a welding gun is fixedly mounted on the side of the rotating block;

[0008] A protection mechanism, the protection mechanism is arranged on one side of the upper arm, the protection mechanism comprises a protection frame located on one side of the upper arm, a protection cover is fixedly installed on the side of the protection frame, an adjustment plate is fixedly installed on the other side of the protection cover, and the protection mechanism is used to protect the forearm and the welding gun;

[0009] The limiting mechanism is arranged inside the protection frame, and the limiting mechanism includes a limiting plate located inside the protection frame. An arc tube is installed on the side of the limiting plate through which the limiting plate slides. The limiting mechanism is used to limit and fix the forearm.

[0010] Preferably, the side surface of the protective frame is fixedly connected to the side surface of the upper arm, a shell is fixedly installed on the side surface of the protective frame, the number of the protective cover and the adjustment plate are two, a semicircular plate and two arc rods are fixedly installed on the side surface of the protective frame, and through holes are respectively opened on the sides of the two adjustment plates, and the inner walls of the multiple through holes are respectively slidably connected to the outer walls of the two arc rods.

[0011] Preferably, two T-shaped blocks are respectively fixedly installed on the side surfaces of the two adjustment plates, and two reinforcement rods are respectively fixedly installed on the side walls of the two protective covers.

[0012] Preferably, a T-shaped block 1 is fixedly installed at the lower end of each of the reinforcement rods, a T-shaped groove 1 is provided on the outer wall of the semicircular plate, and the outer walls of the two T-shaped blocks 2 and the outer walls of the multiple T-shaped blocks 1 are slidably connected to the inner wall of the T-shaped groove 1.

[0013] Preferably, hinge blocks are fixedly mounted on the side surfaces of the two adjustment plates, and connecting rods are hinged on the inner walls of the two hinge blocks.

[0014] Preferably, the other ends of the two connecting rods are hinged with T-shaped blocks three, the inner wall of the lower end of the protective frame is provided with T-shaped slot two, the outer wall of T-shaped block three is slidably connected to the inner wall of T-shaped slot two, a fixed block is fixedly installed on the inner wall of the lower end of the protective frame, an electric push rod is fixedly installed on the side of the fixed block, and one end of the electric push rod is fixedly connected to the side of T-shaped block three.

[0015] Preferably, a groove body 1 is formed on the top surface of the semicircular plate and the inner wall of the lower end of the protective frame, a groove body 2 is formed on the inner wall of the lower end of the groove body, the side surface of the limiting plate is hinged to the inside of the groove body 1, and the side surface of the limiting plate is slidably connected to the inner wall of the groove body 2.

[0016] Preferably, the second inner wall of the trough body is fixedly connected to one end of the arc-shaped tube, a fixing plate is fixedly installed on the first inner wall of the trough body, and the other end of the arc-shaped tube is fixedly connected to the lower end of the fixing plate.

[0017] Preferably, an elastic member is slidably mounted on the outer wall of the arc-shaped tube, and two ends of the elastic member are respectively fixedly connected to the bottom surface of the fixing plate and the side surface of the limiting plate.

[0018] Preferably, a mounting plate is fixedly mounted on three sides of the T-shaped block, a push plate is fixedly mounted on one end side of the mounting plate, a push block is fixedly mounted on one end of the push plate, and the bottom surface of the push block is slidably connected to the side surface of the limiting plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention rotates the forearm and the welding gun into the protection frame, turns on the electric push rod, the electric push rod drives the T-shaped block three to move, the T-shaped block three drives the two connecting rods to move, the connecting rod drives the hinge block to rotate, the hinge block drives the adjustment plate to rotate, the adjustment plate drives the protective cover and the reinforcement rod to rotate, when the two adjustment plates are in contact, the two protective covers shield the protection frame, thereby protecting the forearm and the welding gun inside the protection frame, making the forearm and the welding gun less likely to be damaged by collision with workers, thereby improving the service life of the equipment;

[0021] When the T-shaped block three is moved by the electric push rod, the T-shaped block three moves to the far left, the elastic part pushes one end of the limit plate to rotate, the other end of the limit plate rotates to a vertical state, and the side surface of the limit plate contacts the side surface of the forearm to limit and fix the forearm, ensuring that the forearm is not easy to move out of the protection frame, thereby improving the protection quality of the forearm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the protective cover of the present invention;

[0024] Figure 3 It is an exploded view of the three-dimensional structure of the present invention;

[0025] Figure 4 It is a cross-sectional schematic diagram of the three-dimensional structure of the protection frame of the present invention;

[0026] Figure 5 It is an exploded view of the three-dimensional structure of the semicircular plate of the present invention;

[0027] Figure 6 It is a cross-sectional schematic diagram of the three-dimensional structure of the adjustment plate of the present invention;

[0028] Figure 7 For the present invention Figure 5 Enlarged view of point A in the middle;

[0029] Figure 8 For the present invention Figure 4 Enlarged view of point B in the middle;

[0030] Fig. 9 For the present invention Figure 4 Enlarged view of center C.

[0031] In the figure:

[0032] 1. Base; 101. Turntable; 102. Upper arm; 103. Joint 1; 104. Joint 2; 105. Lower arm; 106. Turntable; 107. Welding gun;

[0033] 2. Protective mechanism; 201. Protective frame; 202. Shell; 203. Arc rod; 204. Semicircular plate; 205. Adjustment plate; 206. T-block 1; 207. T-slot 1; 208. Protective cover; 209. T-block 2; 210. Reinforcement rod; 211. Articulated block; 212. Connecting rod; 213. T-block 3; 214. T-slot 2; 215. Fixed block; 216. Electric push rod;

[0034] 3. Limiting mechanism; 301. Slot body 1; 302. Slot body 2; 303. Fixing plate; 304. Limiting plate; 305. Arc tube; 306. Elastic member; 307. Push block; 308. Push plate; 309. Mounting plate. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] like Figure 1-9 As shown, the present application provides a mechanical arm structure for a welding robot, comprising: a base 1, a turntable 101 is rotatably mounted on the top surface of the base 1, a large arm 102 is rotatably mounted on the top surface of the turntable 101 through a joint 103, a small arm 105 is rotatably mounted on the upper end of the large arm 102 through a joint 2 104, a rotating block 106 is rotatably mounted on one end of the small arm 105, and a welding gun 107 is fixedly mounted on the side of the rotating block 106;

[0038] The protection mechanism 2 is arranged on one side of the upper arm 102. The protection mechanism 2 includes a protection frame 201 located on one side of the upper arm 102. A protection cover 208 is fixedly installed on the side of the protection frame 201. An adjustment plate 205 is fixedly installed on the other side of the protection cover 208. The protection mechanism 2 is used to protect the forearm 105 and the welding gun 107.

[0039] Specifically, Figure 1-9As shown, the side of the protective frame 201 is fixedly connected to the side of the upper arm 102, and a shell 202 is fixedly installed on the side of the protective frame 201. There are two protective covers 208 and two adjustment plates 205. A semicircular plate 204 and two arc-shaped rods 203 are fixedly installed on the side of the protective frame 201. Through holes are respectively opened on the sides of the two adjustment plates 205, and the inner walls of the multiple through holes are respectively slidably connected to the outer walls of the two arc-shaped rods 203.

[0040] In this embodiment: the protective frame 201 is provided to protect the forearm 105 and the welding gun 107, and the protective cover 208 is provided to shield the forearm 105 and the welding gun 107 inside the protective frame 201, thereby ensuring that the forearm 105 and the welding gun 107 are not easily impacted by the outside world, thereby improving the service life of the forearm 105 and the welding gun 107.

[0041] Specifically, Figure 1-9 As shown, two T-shaped blocks 209 are fixedly installed on the sides of the two adjustment plates 205, and two reinforcement rods 210 are fixedly installed on the side walls of the two protective covers 208.

[0042] In this embodiment: the adjustment plate 205 is fixed by the T-shaped block 209, and the reinforcement rod 210 supports and reinforces the protective cover 208, so as to ensure that the protective cover 208 moves more stably and the protective cover 208 is made of a soft material.

[0043] Specifically, Figure 1-9 As shown, a T-shaped block 206 is fixedly installed at the lower end of multiple reinforcement rods 210, a T-shaped slot 207 is opened on the outer wall of the semicircular plate 204, and the outer walls of two T-shaped blocks 209 and multiple outer walls of T-shaped blocks 206 are slidably connected to the inner wall of the T-shaped slot 207.

[0044] In this embodiment: the reinforcing rod 210 is reinforced by setting the T-shaped block 209, and the T-shaped groove 1 207 is set to limit the T-shaped block 1 206 and the T-shaped block 209, so that the movement of the T-shaped block 1 206 and the T-shaped block 209 is more stable, ensuring that the movement of the reinforcing rod 210 and the adjustment plate 205 is more stable.

[0045] Specifically, Figure 1-9 As shown, hinge blocks 211 are fixedly installed on the sides of the two adjustment plates 205 , and connecting rods 212 are hinged on the inner walls of the two hinge blocks 211 .

[0046] In this embodiment, when the connecting rod 212 is moved, the hinge block 211 can be driven to rotate, and the hinge block 211 drives the adjustment plate 205 to rotate.

[0047] Specifically, Figure 1-9As shown, the other ends of the two connecting rods 212 are hinged with T-shaped blocks 3 213, the inner wall of the lower end of the protective frame 201 is provided with T-shaped slot 214, the outer wall of the T-shaped block 3 213 is slidably connected with the inner wall of the T-shaped slot 214, and a fixed block 215 is fixedly installed on the inner wall of the lower end of the protective frame 201, and an electric push rod 216 is fixedly installed on the side of the fixed block 215, and one end of the electric push rod 216 is fixedly connected to the side of the T-shaped block 3 213.

[0048] In this embodiment, the T-shaped block 3 213 is limited by the T-shaped slot 214 so that the T-shaped block 3 213 moves smoothly, and the electric push rod 216 drives the T-shaped block 3 213 to move, thereby driving the connecting rod 212 to move.

[0049] The limiting mechanism 3 is arranged inside the protection frame 201. The limiting mechanism 3 includes a limiting plate 304 located inside the protection frame 201. An arc tube 305 is installed on the side of the limiting plate 304 for sliding through. The limiting mechanism 3 is used to limit and fix the forearm 105.

[0050] Specifically, Figure 1-9 As shown, a groove body 301 is formed on the top surface of the semicircular plate 204 and the inner wall at the lower end of the protective frame 201, a groove body 302 is formed on the inner wall at the lower end of the groove body 301, and the side surface of the limiting plate 304 is hinged to the inside of the groove body 301, and the side surface of the limiting plate 304 is slidably connected to the inner wall of the groove body 302.

[0051] In this embodiment, the side surface of the limiting plate 304 is hinged to the inside of the groove body 1 301 , so that the limiting plate 304 can rotate to a certain angle.

[0052] Specifically, Figure 1-9 As shown, the inner wall of the second tank body 302 is fixedly connected to one end of the arc tube 305 , a fixing plate 303 is fixedly installed on the inner wall of the first tank body 301 , and the other end of the arc tube 305 is fixedly connected to the lower end of the fixing plate 303 .

[0053] In this embodiment, the limit plate 304 is limited by the arc tube 305, so that the rotation of the limit plate 304 is more stable.

[0054] Specifically, Figure 1-9 As shown, an elastic member 306 is slidably mounted on the outer wall of the arc tube 305 , and two ends of the elastic member 306 are fixedly connected to the bottom surface of the fixing plate 303 and the side surface of the limiting plate 304 respectively.

[0055] In this embodiment, the elastic member 306 is provided to apply elastic force to the limiting plate 304, thereby ensuring that the limiting plate 304 has continuous elastic force.

[0056] Specifically, Figure 1-9As shown, a mounting plate 309 is fixedly installed on the side of the T-shaped block 3 213, a push plate 308 is fixedly installed on the side of one end of the mounting plate 309, a push block 307 is fixedly installed on one end of the push plate 308, and the bottom surface of the push block 307 is slidably connected to the side of the limiting plate 304.

[0057] In this embodiment, the push block 307 is provided so as to push the limit plate 304 to rotate to a horizontal angle.

[0058] The specific solution is as follows: the forearm 105 and the welding gun 107 are rotated into the protective frame 201, the electric push rod 216 is turned on, the electric push rod 216 drives the T-shaped block 3 213 to move, the T-shaped block 3 213 drives the two connecting rods 212 to move, the connecting rod 212 drives the hinge block 211 to rotate, the hinge block 211 drives the adjustment plate 205 to rotate, the adjustment plate 205 drives the protective cover 208 and the reinforcement rod 210 to rotate, when the two adjustment plates 205 are in contact, the two protective covers 208 cover the protective frame 201, thereby the protective frame 201 is 01, the forearm 105 and the welding gun 107 inside are protected, so that the forearm 105 and the welding gun 107 are not easily damaged by collisions of workers, thereby improving the service life of the equipment, and when the T-shaped block three 213 moves, the T-shaped block three 213 moves to the leftmost side, and the elastic member 306 pushes one end of the limit plate 304 to rotate, and the other end of the limit plate 304 rotates to a vertical state, and the side surface of the limit plate 304 contacts the side surface of the forearm 105 to limit and fix the forearm 105, ensuring that the forearm 105 is not easily moved out of the protective frame 201, thereby improving the protection quality of the forearm 105.

[0059] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary; within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0060] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical arm structure for a welding robot, comprising: A base (1), a turntable (101) is rotatably mounted on the top surface of the base (1), a large arm (102) is rotatably mounted on the top surface of the turntable (101) via a joint 1 (103), a small arm (105) is rotatably mounted on the upper end of the large arm (102) via a joint 2 (104), a rotating block (106) is rotatably mounted on one end of the small arm (105), a welding gun (107) is fixedly mounted on the side of the rotating block (106), and the invention is characterized in that: A protection mechanism (2), the protection mechanism (2) being arranged on one side of the upper arm (102), the protection mechanism (2) comprising a protection frame (201) located on one side of the upper arm (102), a protection cover (208) being fixedly mounted on the side of the protection frame (201), an adjustment plate (205) being fixedly mounted on the other side of the protection cover (208), the protection mechanism (2) being used to protect the lower arm (105) and the welding gun (107); A limiting mechanism (3), the limiting mechanism (3) being arranged inside the protective frame (201), the limiting mechanism (3) comprising a limiting plate (304) located inside the protective frame (201), an arc tube (305) being installed on the side of the limiting plate (304) for sliding through, and the limiting mechanism (3) being used for limiting and fixing the forearm (105).

2. A mechanical arm structure for a welding robot according to claim 1, characterized in that: The side of the protection frame (201) is fixedly connected to the side of the upper arm (102); a shell (202) is fixedly installed through the side of the protection frame (201); the number of the protection cover (208) and the adjustment plate (205) are both two; a semicircular plate (204) and two arc-shaped rods (203) are fixedly installed on the side of the protection frame (201); through holes are respectively opened through the sides of the two adjustment plates (205); and the inner walls of the multiple through holes are respectively slidably connected to the outer walls of the two arc-shaped rods (203).

3. A mechanical arm structure for a welding robot according to claim 2, characterized in that: Two T-shaped blocks (209) are fixedly mounted on the sides of the two adjustment plates (205), and two reinforcing rods (210) are fixedly mounted on the side walls of the two protection covers (208).

4. A mechanical arm structure for a welding robot according to claim 3, characterized in that: The lower ends of the plurality of reinforcement rods (210) are respectively fixedly mounted with T-shaped blocks 1 (206); the outer wall of the semicircular plate (204) is provided with a T-shaped slot 1 (207); the outer walls of the two T-shaped blocks 2 (209) and the outer walls of the plurality of T-shaped blocks 1 (206) are slidably connected to the inner wall of the T-shaped slot 1 (207).

5. A mechanical arm structure for a welding robot according to claim 4, characterized in that: Hinge blocks (211) are fixedly mounted on the sides of the two adjustment plates (205), and connecting rods (212) are hingedly connected to the inner walls of the two hinge blocks (211).

6. A mechanical arm structure for a welding robot according to claim 5, characterized in that: The other ends of the two connecting rods (212) are hinged with a T-shaped block three (213); the inner wall of the lower end of the protection frame (201) is provided with a T-shaped slot two (214); the outer wall of the T-shaped block three (213) is slidably connected to the inner wall of the T-shaped slot two (214); a fixed block (215) is fixedly installed on the inner wall of the lower end of the protection frame (201); an electric push rod (216) is fixedly installed on the side of the fixed block (215); one end of the electric push rod (216) is fixedly connected to the side of the T-shaped block three (213).

7. A mechanical arm structure for a welding robot according to claim 6, characterized in that: A groove body 1 (301) is provided on the top surface of the semicircular plate (204) and the inner wall at the lower end of the protective frame (201); a groove body 2 (302) is provided on the inner wall at the lower end of the groove body 1 (301); the side surface of the limiting plate (304) is hinged to the inside of the groove body 1 (301); and the side surface of the limiting plate (304) is slidably connected to the inner wall of the groove body 2 (302).

8. A mechanical arm structure for a welding robot according to claim 7, characterized in that: The inner wall of the second trough body (302) is fixedly connected to one end of the arc-shaped tube (305), the inner wall of the first trough body (301) is fixedly installed with a fixing plate (303), and the other end of the arc-shaped tube (305) is fixedly connected to the lower end of the fixing plate (303).

9. A mechanical arm structure for a welding robot according to claim 8, characterized in that: An elastic member (306) is slidably mounted on the outer wall of the arc-shaped tube (305), and two ends of the elastic member (306) are respectively fixedly connected to the bottom surface of the fixing plate (303) and the side surface of the limiting plate (304).

10. A mechanical arm structure for a welding robot according to claim 9, characterized in that: A mounting plate (309) is fixedly mounted on the side surface of the T-shaped block (213); a push plate (308) is fixedly mounted on the side surface of one end of the mounting plate (309); a push block (307) is fixedly mounted on one end of the push plate (308); and the bottom surface of the push block (307) is slidably connected to the side surface of the limiting plate (304).

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