High-precision positioning clamp for numerical control machining mechanical arm

Abstract

The utility model relates to the technical field of mechanical arm positioning clamps, and discloses a numerical control machining mechanical arm high-precision positioning clamp which comprises a base, a mechanical arm assembly for motion positioning is arranged at the top of the base, a quick-release assembly used for mounting and dismounting is arranged on the left side of the mechanical arm assembly, and a fixing plate is arranged at the bottom of the quick-release assembly. A driving assembly used for providing power is arranged on the left side of the fixing plate, a rotating gear is fixedly connected to the exterior of the driving assembly, two fixing shafts are fixedly connected to the interior of the fixing plate, and an adjusting gear block is rotatably connected to the exterior of one of the fixing shafts; and the outer part of the other fixed shaft is rotationally connected with a rotating sector gear block. According to the utility model, the movement of the clamping mechanism is more stable and accurate, a machined part is prevented from displacement or loosening in the machining process, the process requirement of high-precision machining is met, and the stable clamping and fixing of the machined part are effectively realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical arm positioning fixture technical field especially relates to numerical control processing mechanical arm high accuracy positioning fixture. BACKGROUND

[0002] Numerical control processing mechanical arm is a kind of highly automated equipment, plays a key role in modern manufacturing. It is the product of the combination of mechanical arm technology and numerical control processing technology, and numerical control processing mechanical arm is usually composed of multiple joints and connecting rods, these joints can rotate flexibly, simulate the movement mode of human arm, so that the mechanical arm can move freely in three-dimensional space. Its end effector is the key part to realize processing function, according to different processing tasks, various tools such as cutters, fixtures can be installed. In terms of working principle, numerical control processing mechanical arm is controlled through the numerical control program written in advance to control its movement trajectory and action sequence. These programs accurately specify the movement angle, speed of each joint of the mechanical arm and the specific steps of processing operation, so as to realize the accurate processing of workpiece. It can carry out milling, drilling, cutting and other processing operations, and is widely used in automobile manufacturing, aerospace, 3C product processing and many other fields, which can effectively improve production efficiency, processing precision and product quality.

[0003] Numerical control processing mechanical arm and positioning fixture are closely related. Positioning fixture is a device for fixing workpiece, and its main function is to ensure the accuracy and stability of the position of workpiece in the processing process. Numerical control processing mechanical arm is responsible for processing operation on the workpiece fixed by positioning fixture, and the accuracy of mechanical arm depends on the accurate positioning of positioning fixture. Only when the workpiece is firmly and accurately fixed by the fixture, the mechanical arm can carry out accurate processing action according to the preset numerical control program.

[0004] However, part of the existing numerical control processing mechanical arm high-precision positioning fixture cannot effectively cope with the various forces generated by the workpiece during processing, and thus it is difficult to realize stable and reliable clamping of the workpiece. This not only affects the processing precision and surface quality of the workpiece, but also causes safety hazards due to the loosening of the workpiece, and also limits the improvement of the efficiency and overall quality of numerical control processing to some extent, therefore, the numerical control processing mechanical arm high-precision positioning fixture is proposed to solve the above problems. INVENTION CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides numerical control processing mechanical arm high-precision positioning fixture, aims at improving the problem that part of the numerical control processing mechanical arm high-precision positioning fixture in prior art cannot realize stable clamping of workpiece.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] Numerical control machining arm high-precision positioning clamp, including base, the top of base is provided with movement positioning mechanical arm assembly, the left side of mechanical arm assembly is provided with quick release assembly for installation and removal, the bottom of quick release assembly is provided with fixed plate, the left side of fixed plate is provided with driving assembly for providing power, the outside of driving assembly is fixedly connected with rotating gear, the inside of fixed plate is fixedly connected with two fixed shafts, the outside of one of fixed shafts is rotatably connected with adjusting gear block, the outside of another fixed shaft is rotatably connected with rotating fan gear block, the bottom of fixed plate is rotatably connected with a plurality of rotating rods one, the bottom of adjusting gear block and rotating fan gear block is rotatably connected with connecting shaft one, the outside of two connecting shafts one is rotatably connected with clamping arm, the inside of two clamping arms is fixedly connected with connecting shaft two, the left side of fixed plate is rotatably connected with rotating rod two;

[0008] As a further description of the above technical solutions:

[0009] The mechanical arm assembly includes a control module, the bottom of the control module is installed on the top of the base, the top of the control module is provided with a rotating arm, the top of the rotating arm is provided with an adjusting arm, and the left side of the adjusting arm is provided with a connecting block.

[0010] As a further description of the above technical solutions:

[0011] The quick release assembly includes a mounting plate, the outside of the mounting plate is fixedly connected to the inside of the connecting block, a cylinder is installed on the top of the mounting plate, the output end of the cylinder is fixedly connected with a push rod, the bottom of the push rod is fixedly connected with a trapezoidal block, two limiting frames are slidably connected in the inside of the trapezoidal block, two limiting grooves are formed in the inside bottom side of the trapezoidal block, a triangular block is fixedly connected to the far side of each of the two limiting frames, a positioning shaft is fixedly connected to the inside of each of the two triangular blocks, a butt joint shaft is fixedly connected to the bottom of each of the two triangular blocks, and a plurality of positioning grooves are formed in the inside left side of the connecting block.

[0012] As a further description of the above technical solutions:

[0013] The driving assembly includes a motor, the right side of the motor is installed on the left side of the fixed plate, and the output end of the motor is fixedly connected with a driving shaft.

[0014] As a further description of the above technical solutions:

[0015] The rotating gear and the adjusting gear block are in meshing connection, and the adjusting gear block and the rotating fan gear block are in meshing connection.

[0016] As a further description of the above technical solutions:

[0017] The bottom of the rotating rod one is rotationally connected to the outside of the fixed plate, and the outside of the rotating rod two is rotationally connected to the outside of the connecting shaft one;

[0018] As further description of the above technical solution:

[0019] The outside of the limiting frame is slidingly connected to the inside of the limiting groove, and the outside of the positioning shaft is slidingly connected to the inside of the positioning groove.

[0020] As further description of the above technical solution:

[0021] The inside top side of the fixed plate is provided with two mounting holes, and the outside of the butt joint shaft is slidingly connected to the inside of the mounting hole.

[0022] The utility model has the advantages of the following:

[0023] 1. In the utility model, the driving shaft of the motor output end drives the rotating gear to rotate, the rotating gear is engaged with the adjusting gear block, the adjusting gear block is engaged with the rotating fan gear block, the rotating movement of the motor drives the clamping arm to move. The clamping arm realizes the opening and closing action of rotating around the connecting shaft two, the rotating rod one and the rotating rod two play the roles of auxiliary support and stable movement, and the movement of the connecting shaft one is constrained and guided, so that the movement of the clamping mechanism is more stable and accurate, the workpiece does not displace or loosen during the machining process, the process requirement of high-precision machining is met, and stable clamping and fixing of the workpiece are effectively realized.

[0024] 2. In the utility model, when the air cylinder is started, the push rod pushes the trapezoidal block to displace, the limiting frame in the trapezoidal block slides in the limiting groove, so as to drive the triangular block to displace, the positioning shaft cooperates with the positioning groove in the connecting block, accurate positioning of the clamp during installation is realized, the butt joint shaft at the bottom of the triangular block slides in or out of the mounting hole in the fixed plate, fast installation and dismounting of the fixed plate are realized, fast installation and dismounting operation of the whole clamp are efficiently realized, and the production and machining efficiency and flexibility are improved. DRAWINGS

[0025] Figure 1 It is the perspective view of the numerical control machining mechanical arm high-precision positioning clamp of the utility model;

[0026] Figure 2 It is the rotating arm structure schematic view of the numerical control machining mechanical arm high-precision positioning clamp of the utility model;

[0027] Figure 3 It is the fixed plate structure schematic view of the numerical control machining mechanical arm high-precision positioning clamp of the utility model;

[0028] Figure 4The rotating rod one structure schematic view of the high-precision positioning clamp of the numerical control machining mechanical arm is provided by the utility model.

[0029] Figure 5 The push rod structure schematic view of the high-precision positioning clamp of the numerical control machining mechanical arm is provided by the utility model.

[0030] Figure 6 The connecting block structure schematic view of the high-precision positioning clamp of the numerical control machining mechanical arm is provided by the utility model.

[0031] Legend:

[0032] 1, base; 2, control module; 3, rotating arm; 4, adjusting arm; 5, connecting block; 6, mounting plate; 7, air cylinder; 8, push rod; 9, trapezoidal block; 10, limiting frame; 11, limiting groove; 12, triangular block; 13, positioning shaft; 14, butt joint shaft; 15, positioning groove; 16, fixed plate; 17, motor; 18, driving shaft; 19, rotating gear; 20, fixed shaft; 21, adjusting gear block; 22, rotating fan gear block; 23, rotating rod one; 24, connecting shaft one; 25, clamping arm; 26, connecting shaft two; 27, rotating rod two. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0034] Reference Figures 1 to 2The utility model provides a kind of embodiment: numerical control processing mechanical arm high-precision positioning fixture, including base 1, base 1 as the basis support part of whole fixture, provide stable mounting platform for upper mechanical arm assembly, quick release assembly and driving assembly etc..The top of base 1 is provided with the mechanical arm assembly of motion positioning, and the mechanical arm assembly includes control module 2, control module 2 is responsible for the motion of control rotating arm 3 and adjusting arm 4.It is integrated with advanced microprocessor and motion control algorithm inside, can accurately drive motor 17 and transmission mechanism according to preset program or the instruction of operator, realize accurate positioning and motion trajectory control of mechanical arm in space.Control module 2 is installed at the top of base 1, the top of control module 2 is provided with rotating arm 3, the top of rotating arm 3 is provided with adjusting arm 4, and the connecting part of rotating arm 3 and control module 2 and adjusting arm 4 uses high-precision bearing and connecting seat, ensure that rotating is flexible and has no gap, so that rotating arm 3 can realize accurate rotary motion in the horizontal plane under the drive of control module 2, to drive adjusting arm 4 and workpiece to different processing positions.Adjusting arm 4 left side is provided with connecting block 5, and the left side of mechanical arm assembly is provided with quick release assembly for installation and disassembly.

[0035] Referring to Figures 2 to 4 The bottom of quick release assembly is provided with fixed plate 16, the left side of fixed plate 16 is provided with driving assembly for providing power, and the driving assembly includes motor 17, which is used as the power source of the driving assembly to provide power for the clamping action of the fixture.The right side of motor 17 is installed on the left side of fixed plate 16, the output end of motor 17 is fixedly connected with driving shaft 18, the outer part of driving assembly is fixedly connected with rotating gear 19, driving shaft 18 transmits the rotary motion of motor 17 to rotating gear 19, and the inner part of fixed plate 16 is fixedly connected with two fixed shafts 20, which are used to support and rotatably connect adjusting gear block 21 and rotating fan gear block 22.The outer part of one of the fixed shafts 20 is rotatably connected with adjusting gear block 21, and the rotary motion of driving shaft 18 is converted into the rotation of adjusting gear block 21 by rotating gear 19, thereby driving the entire clamping mechanism to realize the clamping action on the workpiece.Rotating gear 19 and adjusting gear block 21 are in meshing connection, and the outer part of the other fixed shaft 20 is rotatably connected with rotating fan gear block 22.Adjusting gear block 21 and rotating fan gear block 22 are in meshing connection, adjusting gear block 21 meshes with rotating gear 19 and rotating fan gear block 22, and plays a key intermediate transmission role in the transmission of the entire clamping mechanism.The bottom of fixed plate 16 is rotatably connected with a plurality of rotating rods 23, and the bottom of rotating rod 23 is rotatably connected to the outside of fixed plate 16.

[0036] The bottom of the adjusting gear block 21 and the rotating fan gear block 22 are both rotationally connected with a connecting shaft 24, which converts the gear transmission movement into the linear movement and rotation of the clamping arm 25. The outer part of the two connecting shafts 24 is rotationally connected with the clamping arm 25, which is the component directly contacting the workpiece and realizing the clamping function. During the movement of the clamping arm 25, the rotating rod 27 can share part of the force and play a certain constraint and guiding role on the movement of the connecting shaft 24, so that the movement of the clamping mechanism is more stable and accurate, which helps to improve the clamping precision and stability of the clamp on the workpiece, ensures that the workpiece will not displace or loosen during the machining process, and meets the process requirements of high-precision machining. The inner part of the two clamping arms 25 is fixedly connected with a connecting shaft 26, which provides a fulcrum for the rotation of the clamping arm 25, so that the clamping arm 25 can realize the opening and closing action under the drive of the rotating rod 23, thereby clamping or loosening the workpiece. The left side of the fixed plate 16 is rotationally connected with a rotating rod 27, and the outer part of the rotating rod 27 is rotationally connected with the outer part of the connecting shaft 24. The rotating rod 27 plays a role in auxiliary support and stable movement during clamping.

[0037] Referring to Figure 1 , Figure 5 and Figure 6 , the quick release assembly includes a mounting plate 6, which provides a mounting base for the air cylinder 7, the trapezoidal block 9 and other related components. The outer part of the mounting plate 6 is fixedly connected to the inner part of the connecting block 5, and the top of the mounting plate 6 is provided with the air cylinder 7. The output end of the air cylinder 7 is fixedly connected with the push rod 8. The air cylinder 7 serves as the power source of the quick release assembly and is responsible for driving the reciprocating movement of the push rod 8, thereby realizing the quick installation and disassembly operation of the clamp. The bottom of the push rod 8 is fixedly connected with the trapezoidal block 9, and the inner part of the trapezoidal block 9 is slidably connected with two limiting frames 10. Under the push of the push rod 8, the trapezoidal block 9 realizes the displacement control of the triangular block 12 and the butt joint shaft 14 through cooperation with the limiting frame 10, thereby completing the installation and disassembly operation of the clamp. The inner bottom side of the trapezoidal block 9 is provided with two limiting grooves 11, and the outer part of the limiting frame 10 is slidably connected in the inner part of the limiting groove 11. The limiting groove 11 provides a track and limiting space for the sliding of the limiting frame 10. The distal side of the two limiting frames 10 is fixedly connected with the triangular block 12. By means of the inclined surface design of the triangular block 12 and the trapezoidal block 9, the displacement of the triangular block 12 can be realized. The inner part of the two triangular blocks 12 is fixedly connected with the positioning shaft 13, and the bottom of the two triangular blocks 12 is fixedly connected with the butt joint shaft 14. The inner top side of the fixed plate 16 is provided with two mounting holes, and the outer part of the butt joint shaft 14 is slidably connected in the inner part of the mounting hole. The inner left side of the connecting block 5 is provided with a plurality of positioning grooves 15, and the outer part of the positioning shaft 13 is slidably connected in the inner part of the positioning groove 15. The positioning shaft 13 cooperates with the positioning groove 15 of the connecting block 5 to realize the precise positioning of the clamp during installation.

[0038] Working principle: when using the numerical control machining mechanical arm high-precision positioning fixture, first can control module 2 to control the movement of rotating arm 3 and adjusting arm 4, and then can take the workpiece to different positions for processing, when the workpiece needs to be clamped and fixed, first start the motor 17 to drive the driving shaft 18 and rotating gear 19 rotation, in turn, the meshing between rotating gear 19 and adjusting gear block 21 can make adjusting gear block 21 rotate around one of the fixed shaft 20, at the same time, the meshing between adjusting gear block 21 and rotating fan block 22 can make rotating fan block 22 rotate around the other fixed shaft 20, with the rotation of adjusting gear block 21 and rotating fan block 22, the connecting shaft one 24 will be displaced, in turn, the clamping arm 25, rotating rod one 23 and rotating rod two 27 will be displaced, at this time, the rotation of rotating rod one 23 will make the two clamping arms 25 rotate around connecting shaft two 26, in turn, the clamping and fixing of workpiece can be realized;

[0039] When the fixture needs to be installed and disassembled, first start the cylinder 7 to drive the push rod 8 and trapezoidal block 9 displacement, in turn, the limit frame 10 can slide in the limit slot 11, at this time, the triangular block 12 will be displaced, at this time, the limit of limit frame 10 and the sliding of positioning shaft 13 in positioning slot 15 make the butt shaft 14 slide into or slide out from the installation hole in the fixed plate 16, so as to realize the installation and disassembly of fixed plate 16, in turn, the installation and disassembly of the fixture can be realized.

[0040] Finally, it should be pointed out that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for the skilled in the art, it still can be modified, or equivalent replacement, for the technical scheme recorded in the foregoing embodiments, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the protection scope of the present application.

Claims

1. A high-precision positioning fixture for a numerically controlled machining robot arm, comprising a base (1), characterized in that: The top of the base (1) is provided with a motion positioning mechanical arm assembly, the left side of the mechanical arm assembly is provided with a quick release assembly for mounting and dismounting, the bottom of the quick release assembly is provided with a fixed plate (16), the left side of the fixed plate (16) is provided with a driving assembly for providing power, the outer part of the driving assembly is fixedly connected with a rotating gear (19), the inner part of the fixed plate (16) is fixedly connected with two fixed shafts (20), the outer part of one of the fixed shafts (20) is rotatably connected with an adjusting gear block (21), the outer part of the other fixed shaft (20) is rotatably connected with a rotating fan gear block (22), the bottom of the fixed plate (16) is rotatably connected with a plurality of rotating rods (23), the bottom of the adjusting gear block (21) and the rotating fan gear block (22) are rotatably connected with a connecting shaft (24), the outer part of the two connecting shafts (24) is rotatably connected with a clamping arm (25), the inner part of the two clamping arms (25) is fixedly connected with a connecting shaft (26), the left side of the fixed plate (16) is rotatably connected with a rotating rod (27). ​ 2. The numerically controlled machining arm high-precision positioning fixture according to claim 1, characterized in that: The mechanical arm assembly comprises a control module (2), the bottom of the control module (2) is mounted on the top of the base (1), the top of the control module (2) is provided with a rotating arm (3), the top of the rotating arm (3) is provided with an adjusting arm (4), the left side of the adjusting arm (4) is provided with a connecting block (5).

3. The numerically controlled machining arm high-precision positioning fixture according to claim 2, characterized in that: The quick release assembly comprises a mounting plate (6), the outer part of the mounting plate (6) is fixedly connected in the inner part of the connecting block (5), the top of the mounting plate (6) is mounted with a cylinder (7), the output end of the cylinder (7) is fixedly connected with a push rod (8), the bottom of the push rod (8) is fixedly connected with a trapezoidal block (9), the inner part of the trapezoidal block (9) is slidably connected with two limiting frames (10), the inner bottom side of the trapezoidal block (9) is provided with two limiting grooves (11), the far side of the two limiting frames (10) is fixedly connected with a triangular block (12), the inner part of the two triangular blocks (12) is fixedly connected with a positioning shaft (13), the bottom of the two triangular blocks (12) is fixedly connected with a butt joint shaft (14), the inner left side of the connecting block (5) is provided with a plurality of positioning grooves (15).

4. The numerically controlled machining arm high-precision positioning fixture according to claim 1, characterized in that: The driving assembly comprises a motor (17), the right side of the motor (17) is mounted on the left side of the fixed plate (16), the output end of the motor (17) is fixedly connected with a driving shaft (18).

5. The numerically controlled machining arm high-precision positioning fixture according to claim 1, characterized in that: The rotating gear (19) and the adjusting gear block (21) are in meshing connection, the adjusting gear block (21) and the rotating fan gear block (22) are in meshing connection.

6. The numerically controlled machining arm high-precision positioning fixture according to claim 1, characterized in that: The bottom of the rotating rod (23) is rotatably connected on the outer part of the fixed plate (16), the outer part of the rotating rod (27) is rotatably connected on the outer part of the connecting shaft (24).

7. The numerically controlled machining arm high-precision positioning fixture according to claim 3, characterized in that: The outer part of the limiting frame (10) is slidably connected in the inner part of the limiting groove (11), the outer part of the positioning shaft (13) is slidably connected in the inner part of the positioning groove (15).

8. The numerically controlled machining arm high-precision positioning fixture according to claim 3, characterized in that: The inside top side of the fixed plate (16) is provided with two mounting holes, and the outside of the butt joint shaft (14) is slidingly connected in the inside of the mounting hole.

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