Mechanical arm positioning mechanism

Abstract

The utility model discloses a mechanical arm positioning mechanism which comprises a positioning seat, a rotating seat, a driving piece, a mounting seat, a pressing rod, a rotating rod and a rotating head. The rotating seat is arranged on the side portion of the positioning seat, the driving piece is rotatably arranged on the rotating seat, the mounting seat is arranged on the positioning seat, one end of the pressing rod is rotatably arranged on the mounting seat, one end of the rotating rod is rotatably arranged in the middle of the pressing rod, and the rotating head comprises a first rotating end, a second rotating end and a third rotating end. The first rotating end is rotatably arranged on the mounting base, the second rotating end is rotatably arranged at the other end of the rotating rod, and the third rotating end is connected with the driving part and is driven by the driving part to rotate along the mounting base so as to drive the pressing rod to be lifted or pressed down. The top plate can be pressed through the downward pressing assembly, so that the top plate tightly abuts against the first side plate and the second side plate, and welding is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical arm manufacturing, in particular to a mechanical arm positioning mechanism. Background Art

[0002] Some robotic arms include a bottom plate, a first side plate, a second side plate and a top plate. During production, the lower side of the first side plate is welded to one side of the bottom plate, the lower side of the second side plate is welded to the other side of the bottom plate, and finally one side of the top plate is welded to the upper side of the first side plate, and the other side of the top plate is welded to the upper side of the second side plate, so that the bottom plate, the first side plate, the second side plate and the top plate are welded together to complete the production of the robotic arm.

[0003] When welding the top plate to the first side plate and the second side plate, some top plates have a certain curvature, such as the top plate of the boom of an excavator, which causes a gap between the top plate and the first side plate and the second side plate. When welding, the top plate needs to be pressed down manually to facilitate welding, which is time-consuming and laborious. In view of this, the inventor conducted in-depth research on the above-mentioned defects in the prior art, and thus the present case was created. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, the purpose of the utility model is to provide a mechanical arm positioning mechanism, which can press the top plate by setting a pressing component, so that the top plate is tightly pressed against the first side plate and the second side plate, which is convenient for welding.

[0005] In order to achieve the above-mentioned purpose, the utility model proposes a mechanical arm positioning mechanism, including a positioning seat, a rotating seat, a driving member, a mounting seat, a pressing rod, a rotating rod and a rotating head;

[0006] The rotating seat is arranged on the side of the positioning seat, the driving member is rotatably arranged on the rotating seat, the mounting seat is arranged on the positioning seat, one end of the clamping rod is rotatably arranged on the mounting seat, one end of the rotating rod is rotatably arranged in the middle of the clamping rod, the rotating head includes a first rotating end, a second rotating end and a third rotating end, the first rotating end is rotatably arranged on the mounting seat, the second rotating end is rotatably arranged on the other end of the rotating rod, and the third rotating end is connected to the driving member and is driven by the driving member to rotate along the mounting seat to drive the clamping rod to lift or press down.

[0007] Furthermore, the driving member is a driving cylinder, and a driving rod of the driving cylinder is rotatably connected to the third rotating end.

[0008] Furthermore, a pressing head is arranged at the end of the pressing rod.

[0009] Furthermore, the pressing head is rotatably arranged at the end of the pressing rod, the bottom of one end of the pressing head forms a first pressing portion, and the bottom of the other end of the pressing head forms a second pressing portion.

[0010] Furthermore, the mounting seat, the rotating rod and the rotating head are all provided in pairs, and the pressing rod is located between the two mounting seats.

[0011] Furthermore, a limiting rod is arranged on the positioning seat, and an end of the limiting rod is located below the pressing rod.

[0012] Furthermore, it also includes a side positioning component, which includes a side positioning cylinder and a side positioning block. The side positioning cylinder is arranged in the positioning seat, and the side positioning block is connected to the side positioning cylinder and is driven to move by the side positioning cylinder.

[0013] Furthermore, it also includes a top positioning assembly, which includes a top positioning cylinder, a rotating seat and a crank arm. The top positioning cylinder is located on one side of the positioning seat, the rotating seat is arranged on the side of the positioning seat, the middle part of the crank arm is rotatably connected to the rotating seat, one end of the crank arm is connected to the top positioning cylinder, and is driven by the top positioning cylinder to rotate along the rotating seat.

[0014] Furthermore, it also includes a tooling platform, the positioning seat is arranged on the tooling platform, and the bottom of the top positioning cylinder is rotatably arranged on the tooling platform.

[0015] After adopting the above structure, the mechanical arm positioning mechanism of the utility model has at least the following beneficial effects:

[0016] 1. When making a robotic arm, first place the bottom plate of the robotic arm on the tooling platform, and then place the top plate on the first side plate and the second side plate. At this time, the driving member drives the rotating head to rotate, and the rotation of the rotating head drives the rotating rod to rotate. The rotating rod rotates to lift or press the clamping rod up or down. When the clamping rod is pressed down, it presses on the top plate, thereby applying force to the top plate, firmly pressing the top plate on the first side plate and the second side plate, so that the gap between the first side plate and the second side plate and the top plate is very small, or there is no gap, so as to facilitate the top plate to be firmly welded to the first side plate and the second side plate.

[0017] Second, since the driving member is a driving oil cylinder, the driving force of the driving oil cylinder is relatively large, so that the force applied to the top plate is larger, so that the top plate is tightly pressed against the first side plate and the second side plate.

[0018] Third, by setting a pressing head, the pressing head can effectively press the top plate. Since the pressing head can be rotatably set at the end of the pressing rod, it is suitable for different types of top plates. By setting the first pressing part and the second pressing part, the two sides of the top plate are pressed down, so that the force application process is more uniform during the pressing, so that one side of the top plate is pressed against the first side plate, and the other side of the top plate is pressed against the second side plate, and the welding process is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a mechanical arm positioning mechanism according to an embodiment of the utility model;

[0020] Figure 2 is an exploded view of a mechanical arm positioning mechanism according to an embodiment of the utility model;

[0021] Figure 3 Schematic diagram of the application of the robot arm positioning mechanism according to the embodiment of the utility model.

[0022] Description of symbols

[0023] Positioning seat 1, limiting rod 11, rotating seat 2, driving member 3, mounting seat 4, clamping rod 5, pressing head 51, first pressure part 511, second pressure part 512, rotating rod 6, rotating head 7, first rotating end 71, second rotating end 72, third rotating end 73, side positioning assembly 8, side positioning cylinder 81, side positioning block 82, top positioning assembly 9, top positioning cylinder 91, rotating seat 92, and crank arm 93. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] like Figures 1 to 3 As shown, a mechanical arm positioning mechanism of the utility model includes a positioning seat 1, a rotating seat 2, a driving member 3, a mounting seat 4, a clamping rod 5, a rotating rod 6 and a rotating head 7; the rotating seat 2 is arranged on the side of the positioning seat 1, the driving member 3 is rotatably arranged on the rotating seat 2, the mounting seat 4 is arranged on the positioning seat 1, one end of the clamping rod 5 is rotatably arranged on the mounting seat 4, one end of the rotating rod 6 is rotatably arranged in the middle of the clamping rod 5, and the rotating head 7 includes a first rotating end 71, a second rotating end 72 and a third rotating end 73, the first rotating end 71 is rotatably arranged on the mounting seat 4, the second rotating end 72 is rotatably arranged at the other end of the rotating rod 6, and the third rotating end 73 is connected to the driving member 3 and is driven by the driving member 3 to rotate along the mounting seat 4 to drive the clamping rod 5 to lift or press down.

[0026] In this way, the utility model involves a robot arm positioning mechanism. When manufacturing the robot arm, the bottom plate of the robot arm is first placed on the tooling platform, and then the top plate is placed on the first side plate and the second side plate. At this time, the driving member 3 drives the rotating head 7 to rotate, and the rotation of the rotating head 7 drives the rotating rod 6 to rotate. The rotating rod 6 rotates to lift or press the clamping rod 5 up or down. When the clamping rod 5 is pressed down, it presses on the top plate, thereby applying force to the top plate, firmly pressing the top plate against the first side plate and the second side plate, so that the gap between the first side plate and the second side plate and the top plate is very small, or there is no gap, so as to facilitate the top plate to be firmly welded to the first side plate and the second side plate.

[0027] Optionally, the driving member 3 is a driving cylinder, and a driving rod of the driving cylinder is rotatably connected to the third rotating end 73. Since the driving member 3 is a driving cylinder, the driving force of the driving cylinder is relatively large, so that the force applied to the top plate is larger, so that the top plate is tightly pressed against the first side plate and the second side plate.

[0028] In this example, a pressing head 51 is provided at the end of the clamping rod 5. The pressing head 51 can be rotatably provided at the end of the clamping rod 5, and a first pressure portion 511 is formed at the bottom of one end of the pressing head 51, and a second pressure portion 512 is formed at the bottom of the other end of the pressing head 51. By providing the pressing head 51, the pressing head 51 can effectively press the top plate. Since the pressing head 51 can be rotatably provided at the end of the clamping rod 5, it is suitable for different types of top plates. By providing the first pressure portion 511 and the second pressure portion 512, the two sides of the top plate are pressed down, so that the force application process during the downward pressure is more uniform, so that one side of the top plate is pressed against the first side plate, and the other side of the top plate is pressed against the second side plate, and the welding process is more convenient.

[0029] In some examples, the mounting seat 4, the rotating rod 6 and the rotating head 7 are each provided in two, and the clamping rod 5 is located between the two mounting seats 4. By providing two mounting seats 4, the rotating rod 6 and the rotating head 7, and providing a clamping rod 5, the clamping rod 5 is located between the two mounting seats 4, between the two rotating rods 6, and between the two rotating heads 7, so that the clamping rod 5 is more stable when rotating.

[0030] Furthermore, a limiting rod 11 is provided on the positioning seat 1, and the end of the limiting rod 11 is located below the clamping rod 5. By providing the limiting rod 11, the pressing head 51 is prevented from being pressed down excessively. When the bottom of the clamping rod 5 presses against the end of the limiting rod 11, the pressing head 51 is prevented from descending.

[0031] In this example, a side positioning assembly 8 is also included. The side positioning assembly 8 includes a side positioning cylinder 81 and a side positioning block 82. The side positioning cylinder 81 is arranged in the positioning seat 1, and the side positioning block 82 is connected to the side positioning cylinder 81 and is driven to move by the side positioning cylinder 81.

[0032] Before pressing the lower pressure head 51 against the top plate, the side positioning cylinder 81 can drive the side positioning block 82 to move, so that the side positioning block 82 is pressed against the first side plate or the second side plate, thereby adjusting the position of the robotic arm, calibrating the robotic arm, and finally pressing the lower pressure head 51 against the top plate.

[0033] In some examples, a top positioning assembly 9 is also included, which includes a top positioning cylinder 91, a rotating seat 92 and a crank arm 93. The top positioning cylinder 91 is located on one side of the positioning seat 1, and the rotating seat 92 is arranged on the side of the positioning seat 1. The middle part of the crank arm 93 is rotatably connected to the rotating seat 92, and one end of the crank arm 93 is connected to the top positioning cylinder 91, and is driven by the top positioning cylinder 91 to rotate along the rotating seat 92.

[0034] Before pressing the lower pressure head 51 onto the top plate, after the top plate is placed on the first side plate and the second side plate, the top positioning cylinder 91 drives the crank arm 93 to rotate along the rotating seat 92, so that the crank arm 93 presses against the side of the top plate, thereby adjusting the position of the top plate, correcting the top plate, and finally pressing the lower pressure head 51 onto the top plate. At this time, the robot arm is firmly fixed to make welding more accurate.

[0035] In this example, a tooling platform is also included. The positioning seat 1 is set on the tooling platform, and the bottom of the top positioning cylinder 91 can be rotatably set on the tooling platform. By setting up the tooling platform, it is convenient to install the positioning seat 1 and the top positioning cylinder 91.

[0036] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A mechanical arm positioning mechanism, characterized in that: It includes a positioning seat, a rotating seat, a driving member, a mounting seat, a pressing rod, a rotating rod and a rotating head; The rotating seat is arranged on the side of the positioning seat, the driving member is rotatably arranged on the rotating seat, the mounting seat is arranged on the positioning seat, one end of the clamping rod is rotatably arranged on the mounting seat, one end of the rotating rod is rotatably arranged in the middle of the clamping rod, the rotating head includes a first rotating end, a second rotating end and a third rotating end, the first rotating end is rotatably arranged on the mounting seat, the second rotating end is rotatably arranged on the other end of the rotating rod, and the third rotating end is connected to the driving member and is driven by the driving member to rotate along the mounting seat to drive the clamping rod to lift or press down.

2. The mechanical arm positioning mechanism according to claim 1, characterized in that: The driving member is a driving oil cylinder, and a driving rod of the driving oil cylinder is rotatably connected to the third rotating end.

3. The mechanical arm positioning mechanism according to claim 1, characterized in that: A pressing head is arranged at the end of the pressing rod.

4. The mechanical arm positioning mechanism according to claim 3, characterized in that: The pressing head is rotatably arranged at the end of the pressing rod, the bottom of one end of the pressing head forms a first pressing part, and the bottom of the other end of the pressing head forms a second pressing part.

5. The mechanical arm positioning mechanism according to claim 1, characterized in that: The mounting seat, the rotating rod and the rotating head are all provided in two pieces, and the pressing rod is located between the two mounting seats.

6. The mechanical arm positioning mechanism according to claim 1, characterized in that: A limiting rod is arranged on the positioning seat, and an end of the limiting rod is located below the pressing rod.

7. The mechanical arm positioning mechanism according to claim 1, characterized in that: It also includes a side positioning component, which includes a side positioning cylinder and a side positioning block. The side positioning cylinder is arranged in a positioning seat, and the side positioning block is connected to the side positioning cylinder and is driven to move by the side positioning cylinder.

8. The mechanical arm positioning mechanism according to claim 1, characterized in that: It also includes a top positioning assembly, which includes a top positioning cylinder, a rotating seat and a crank arm. The top positioning cylinder is located on one side of the positioning seat, the rotating seat is arranged on the side of the positioning seat, the middle part of the crank arm is rotatably connected to the rotating seat, one end of the crank arm is connected to the top positioning cylinder, and is driven by the top positioning cylinder to rotate along the rotating seat.

9. The mechanical arm positioning mechanism according to claim 1, characterized in that: It also includes a tooling platform, a positioning seat is arranged on the tooling platform, and the bottom of the top positioning cylinder is rotatably arranged on the tooling platform.

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