Positioning tool for welding process of elevator scissor arm

Abstract

The utility model relates to a positioning tool for elevator shear fork arm welding processing, including bottom plate, one pair of the support frame that is prone to U shape is equipped on bottom plate top both sides, is equipped with support platform in support frame top, is inlayed with first pneumatic clamping jaw in support platform top, the prong of shear fork arm is placed in support platform top and is fixed through first pneumatic clamping jaw clamping, is equipped with the lifting plate that goes up and down in support frame, is equipped with the power mechanism of driving lifting plate lifting on bottom plate, is installed with second pneumatic clamping jaw in lifting plate top, second pneumatic clamping jaw and the sleeve that is in the prong pin hole is passed in correspond, and the sleeve projects prong one side through second pneumatic clamping jaw clamping and fixes, the inside wall of the clamping jaw of second pneumatic clamping jaw is equipped with the locating pin corresponding with the sleeve side wall bolt hole. The utility model makes sleeve and prong positioning fixed effect good, and it is convenient for subsequent welding.

Description

Technical Field

[0001] This utility model relates to the field of elevators, and in particular to a positioning fixture for welding and processing scissor arms of elevators. Background Technology

[0002] The scissor lift arm is one of the core components of a lifting platform, and its structural stability and precision directly affect the overall performance and service life of the platform. During the manufacturing process of the scissor lift arm, the bushing needs to be welded into the pin holes of the fork rod; the welding quality in this process is crucial. Traditional welding methods typically rely on manual positioning, which is easily affected by human factors, making it difficult to guarantee the concentricity and axial parallelism between the bushing and the pin holes of the fork rod, thus affecting the welding quality. While some existing welding fixtures can provide some positioning functionality, they often require complex operating procedures and cannot achieve rapid adjustment or mass production. For example, to ensure that the line connecting the bolt holes on both sides of the bushing remains horizontal, a positioning rod needs to be manually inserted into the bushing, which is inefficient. Summary of the Invention

[0003] This utility model aims to address the shortcomings of existing technologies by providing a positioning fixture for welding and processing scissor arms of elevators.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a positioning fixture for welding and processing a scissor arm of a lifting platform, comprising a base plate, a pair of inverted U-shaped support frames on both sides of the top of the base plate, a support platform on the top of the support frame, a first pneumatic gripper embedded in the top of the support platform, the fork of the scissor arm being placed on the top of the support platform and clamped and fixed by the first pneumatic gripper, a lifting plate for vertical movement being provided inside the support frame, a power mechanism for driving the lifting plate to move up and down being provided on the base plate, a second pneumatic gripper being installed on the top of the lifting plate, the second pneumatic gripper corresponding to a bushing passing through the pin hole of the fork arm, and the bushing protruding from the side of the fork arm being clamped and fixed by the second pneumatic gripper, and a positioning pin corresponding to the bolt hole on the side wall of the bushing being provided on the inner wall of the gripper of the second pneumatic gripper.

[0005] Specifically, the inner walls of the first and second pneumatic grippers are equipped with anti-slip pads.

[0006] Specifically, the top two sides of the base plate are provided with grooves, and the power mechanism includes a cylinder set in the groove, with the cylinder extension rod fixedly connected to the bottom of the lifting plate.

[0007] Specifically, the bottom of the cylinder of the second pneumatic gripper is equipped with a connecting seat, which is slidably connected to the lifting plate, and a fixing mechanism is provided between the connecting seat and the lifting plate.

[0008] Specifically, the bottom of the connecting seat is equipped with a slider, and the top of the lifting plate is equipped with a groove, with the slider sliding within the groove.

[0009] Specifically, the fixing mechanism includes clamping bolts threaded to the front and rear sides of the lifting plate, and the clamping bolts are screwed into the slide groove and fixed with pressure plates. The slider is clamped and fixed by the front and rear pressure plates.

[0010] The beneficial effects of this utility model are as follows: This utility model uses a first pneumatic gripper to fix the fork and a second pneumatic gripper to clamp the bushing. Simultaneously, a locating pin is inserted into the bolt hole on the side wall of the bushing to ensure the concentricity and axial parallelism between the bushing and the fork pin hole, thereby improving welding quality. The use of pneumatic grippers enables rapid clamping and release, making operation simple and quick, and greatly improving production efficiency. The automated operation of the pneumatic grippers reduces manual intervention and can quickly complete the positioning and fixing of the bushing, making it suitable for large-scale production. This tooling structure is simple and can be adjusted according to different specifications of forks and bushings, exhibiting good versatility and adaptability. Attached Figure Description

[0011] Figure 1 This is the front view of the present invention;

[0012] Figure 2 This is a top view of the present invention;

[0013] Figure 3 This is a schematic diagram of the fixing mechanism structure of this utility model;

[0014] Figure 4 This is a schematic diagram showing the connection between the positioning pin and the second pneumatic gripper of this utility model.

[0015] In the diagram: 1-Base plate; 2-Support frame; 3-Support platform; 4-First pneumatic gripper; 5-Fork rod; 6-Lifting plate; 7-Second pneumatic gripper; 8-Busset; 9-Positioning pin; 10-Groove; 11-Cylinder; 12-Connecting seat; 13-Slider; 14-Slide groove; 15-Clamping bolt; 16-Pressure plate;

[0016] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] like Figures 1-4 As shown, a positioning fixture for welding scissor arms of a lifting platform includes a base plate 1. A pair of inverted U-shaped support frames 2 are provided on both sides of the top of the base plate 1. A support platform 3 is provided on the top of the support frame 2. A first pneumatic gripper 4 is embedded in the top of the support platform 3. The fork 5 of the scissor arm is placed on the top of the support platform 3 and clamped and fixed by the first pneumatic gripper 4. The first pneumatic gripper 4 simplifies the positioning and fixing operation of the fork 5, greatly improving production efficiency.

[0019] The support frame 2 is equipped with a lifting plate 6 that can move up and down. The base plate 1 is equipped with a power mechanism that drives the lifting plate 6 to move up and down. The top of the base plate 1 has grooves 10 on both sides. The power mechanism includes a cylinder 11 set in the groove 10. The telescopic rod of the cylinder 11 is fixed to the bottom of the lifting plate 6. A second pneumatic gripper 7 is installed on the top of the lifting plate 6. The second pneumatic gripper 7 corresponds to the bushing 8 that passes through the pin hole of the fork 5. The bushing 8 protrudes from the side of the fork 5 and is clamped and fixed by the second pneumatic gripper 7. The inner wall of the gripper of the second pneumatic gripper 7 is equipped with a positioning pin 9 that corresponds to the bolt hole on the side wall of the bushing 8. The setting of the second pneumatic gripper 7 and the positioning pin 9 not only fixes the bushing 8, but also positions the bolt holes on both sides of the bushing 8, ensuring the concentricity and axial parallelism of the bushing 8 and the pin hole of the fork 5, thereby improving the welding quality.

[0020] The inner walls of the first pneumatic gripper 4 and the second pneumatic gripper 7 are equipped with anti-slip pads. A connecting seat 12 is installed at the bottom of the cylinder of the second pneumatic gripper 7. The connecting seat 12 is slidably connected to the lifting plate 6. A slider 13 is provided at the bottom of the connecting seat 12. A sliding groove 14 is provided at the top of the lifting plate 6. The slider 13 is slidably disposed in the sliding groove 14. A fixing mechanism is provided between the connecting seat 12 and the lifting plate 6. The fixing mechanism includes clamping bolts 15 threaded to the front and rear sides of the lifting plate 6. The clamping bolts 15 are screwed into the sliding groove 14 and fixed with pressure plates 16. The slider 13 is pressed and fixed by the two pressure plates 16. The position of the second pneumatic gripper 7 on the lifting plate 6 is adjustable and can be adjusted according to the distance of the bushing 8 protruding from the fork 5, making it highly adaptable.

[0021] When this utility model is in operation, the fork 5 is placed on the support platform 3 and then clamped and fixed by the first pneumatic gripper 4. At this time, the fork 5 is positioned. Then, the bushing 8 is inserted into the pin hole. The cylinder 11 drives the second pneumatic gripper 7 to move upward. Then, the second pneumatic gripper 7 clamps the protruding end of the bushing 8 on one side. At the same time, the positioning pin 9 is inserted into the bolt holes on both sides of the bushing 8, so that the bushing 8 keeps the line connecting the bolt holes on both sides horizontal during the welding process. At this time, the bushing 8 and the fork 5 are positioned. First, weld the side of the bushing 8 away from the second pneumatic gripper 7. After the welding is completed, release the second pneumatic gripper 7 and move it down to weld the other side of the bushing 8.

[0022] This invention uses a first pneumatic gripper 4 to fix the fork 5 and a second pneumatic gripper 7 to clamp the bushing 8. Simultaneously, a locating pin 9 is inserted into the bolt hole on the side wall of the bushing 8 to ensure the concentricity and axial parallelism between the bushing 8 and the pin hole of the fork 5, thereby improving welding quality. The use of pneumatic grippers enables rapid clamping and release, making operation simple and quick, and greatly improving production efficiency. The automated operation of the pneumatic grippers reduces manual intervention and can quickly complete the positioning and fixing of the bushing 8, making it suitable for large-scale production. This tooling structure is simple and can be adjusted according to different specifications of fork 5 and bushing 8, exhibiting good versatility and adaptability.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A positioning fixture for welding and processing a scissor lift arm, comprising a base plate (1), characterized in that, The bottom plate (1) has a pair of U-shaped support frames (2) on both sides of the top. The support frame (2) has a support platform (3) on the top. The support platform (3) has a first pneumatic gripper (4) embedded on the top. The fork (5) of the scissor arm is placed on the top of the support platform (3) and clamped and fixed by the first pneumatic gripper (4). The support frame (2) has a lifting plate (6) that can be raised and lowered. The bottom plate (1) has a power mechanism that drives the lifting plate (6) to be raised and lowered. The top of the lifting plate (6) is equipped with a second pneumatic gripper (7). The second pneumatic gripper (7) corresponds to the bushing (8) that passes through the pin hole of the fork (5). The bushing (8) protrudes from the side of the fork (5) and is clamped and fixed by the second pneumatic gripper (7). The inner wall of the gripper of the second pneumatic gripper (7) is equipped with a positioning pin (9) that corresponds to the bolt hole on the side wall of the bushing (8).

2. The positioning fixture for welding and processing a scissor lift arm according to claim 1, characterized in that, The inner walls of the first pneumatic gripper (4) and the second pneumatic gripper (7) are provided with anti-slip pads.

3. The positioning fixture for welding and processing a scissor lift arm according to claim 1, characterized in that, The bottom plate (1) has grooves (10) on both sides of the top. The power mechanism includes a cylinder (11) set in the groove (10). The telescopic rod of the cylinder (11) is fixedly connected to the bottom of the lifting plate (6).

4. The positioning fixture for welding and processing a scissor lift arm according to claim 1, characterized in that, The bottom of the cylinder of the second pneumatic gripper (7) is equipped with a connecting seat (12), which is slidably connected to the lifting plate (6). A fixing mechanism is provided between the connecting seat (12) and the lifting plate (6).

5. A positioning fixture for welding and processing a scissor lift arm according to claim 4, characterized in that, The bottom of the connecting seat (12) is provided with a slider (13), and the top of the lifting plate (6) is provided with a groove (14). The slider (13) is slidably disposed in the groove (14).

6. A positioning fixture for welding and processing a scissor lift arm according to claim 5, characterized in that, The fixing mechanism includes clamping bolts (15) threaded to the front and rear sides of the lifting plate (6), and the clamping bolts (15) are screwed into the slide groove (14) and fixed with pressure plates (16). The slider (13) is clamped and fixed by the two pressure plates (16).

Images