A shearing fork outer arm splicing tool

Abstract

The utility model discloses a kind of shears fork outer arm splicing point tool, including square tube frame, the pneumatic device installation part of being fixed to its both sides and the installation crossbeam between them. Pneumatic device installation part is symmetrically arranged at least two groups, and welded with pneumatic positioning assembly thereon;The component includes cylinder, the positioning rod of through installation part and rod end limiting step surface, and the positioning rod of connecting key installation hole side is also sleeved with the compensating positioning sleeve with step surface. Positioning assembly is equipped on installation crossbeam, including the jacking cylinder of the inside of the outer arm of the both sides of jacking, and the limiting cylinder and limiting plate of outside, to realize the accurate positioning and clamping of outer arm. The utility model is combined by pneumatic and mechanical structure, realizes the efficient, accurate positioning of shears fork outer arm splicing point process.

Description

Technical Field

[0001] This utility model relates to a scissor lift arm splicing fixture, belonging to the technical field of engineering machinery manufacturing equipment. Background Technology

[0002] As the core moving component of a scissor lift aerial work platform, the form and position tolerances between the mounting holes of its hinge points, especially the positional and coaxiality tolerances, directly determine the overall motion accuracy and stability of the machine. Traditional manufacturing processes generally employ the "post-weld boring" method, which involves performing overall precision machining on the deformed mounting holes after welding to forcibly correct hole position deviations.

[0003] This post-compensation process has several limitations. The long machining cycle and specialized nature of boring machines severely restrict production pace and capacity expansion; simultaneously, machine tool depreciation, cutting tool costs, and labor costs continuously drive up the total product cost. From a quality perspective, concentrating precision assurance entirely on the final process exposes products to consistency risks, and machining marks detract from the overall aesthetics of the component surface.

[0004] To overcome the above limitations, it is necessary to shift to a process route centered on precise pre-welding positioning, and control welding deformation through high-precision splicing tooling, thereby improving efficiency, reducing costs, and achieving stable and controllable quality. Summary of the Invention

[0005] Purpose of the invention: To address the shortcomings of existing technologies, this utility model provides a scissor lift arm splicing fixture to solve the problems mentioned in the background section.

[0006] Technical solution: A scissor lift arm splicing fixture, comprising a rectangular tube frame, a pneumatic device mounting part fixedly disposed on both sides of the rectangular tube frame, and a mounting beam disposed between the two sides of the rectangular tube frame; At least two sets of pneumatic mounting parts are distributed along the long side of the rectangular tube frame, and are symmetrically arranged on both sides of the rectangular tube frame. Pneumatic positioning components are welded and fixed on the pneumatic device mounting parts. Any of the pneumatic positioning components includes a cylinder installed on the outside of the pneumatic device mounting part and a positioning rod that passes through the pneumatic device mounting part and is poweredly connected to the cylinder output end; the end of the positioning rod is provided with a limit step surface; The pneumatic positioning assembly near the mounting hole on the side of the outer arm for connecting the work platform or the frame also includes a compensating positioning sleeve that is detachably fitted onto the inner end of the positioning rod, and the compensating positioning sleeve has a stepped surface in the middle.

[0007] This utility model's scissor lift arm splicing fixture uses a rectangular tube frame as its basic structure, with multiple sets of pneumatic positioning components symmetrically arranged on both sides to ensure the overall rigidity and clamping stability of the fixture. By setting a limiting step surface at the end of the positioning rod and adding a detachable compensating positioning sleeve to the positioning rod near the connection end of the lift arm, the fixture can quickly adapt to the mounting holes of different models of fork arms, significantly improving its versatility and positioning accuracy in robotic welding.

[0008] Any of the pneumatic positioning components further includes a guide sleeve that penetrates the pneumatic device mounting portion, the positioning rod is slidably mounted in the guide sleeve, and the cylinder is fixedly mounted on the end face of the guide sleeve near the outer side.

[0009] A guide sleeve is added through the pneumatic device mounting section to slide the positioning rod in it, providing precise guidance for the movement of the positioning rod, effectively preventing deflection and jamming, and improving the reliability of the operation and the service life of the components.

[0010] The guide sleeve is internally configured with two sections of different inner diameters. The inner diameter of the positioning rod is matched with the inner diameter of the guide sleeve near the outer arm. The side of the positioning rod connected to the cylinder output end is configured with a limiting platform that matches the inner diameter of the other section of the guide sleeve. The stroke of the positioning rod is limited by the sliding space length of the limiting platform.

[0011] The guide sleeve is divided into two sections with different inner diameters, which cooperate with the corresponding sections of the positioning rod to mechanically limit its stroke. This design avoids reliance on pneumatic or electrical control, improves positioning repeatability, and is suitable for stable operation in automated production lines.

[0012] At least two mounting beams are provided, located near the front and rear ends of the rectangular tube frame respectively. The mounting beams are provided with positioning assemblies for positioning the outer arms on both sides. The positioning assembly on any of the mounting beams includes two clamping cylinders disposed between the two outer arms and a limiting cylinder and a limiting plate disposed on the outer sides of the two outer arms. The extension and retraction ends of the two clamping cylinders are in opposite directions and are used to clamp the inner sides of the outer arms on both sides respectively. The limiting cylinder is disposed on the outer side of any outer arm, and the limiting plate is disposed on the outer side of the other outer arm. The limiting plates and limiting cylinders on the two mounting beams are disposed on the same side.

[0013] The mounting beam is equipped with a positioning assembly consisting of a clamping cylinder, a limiting cylinder, and a limiting plate, enabling bidirectional clamping and unilateral limiting to ensure alignment and clamping reliability during the assembly of the outer arm. The asymmetrical layout facilitates rapid separation of the tooling and workpiece after welding, improving work efficiency.

[0014] The diameter of the telescopic rod of the limiting cylinder is larger than the diameter of the telescopic rod of the tightening cylinder.

[0015] The diameter of the telescopic rod of the limit cylinder is larger than that of the tightening cylinder, which enhances its bending stiffness and prevents the limit cylinder rod from being pushed back during the tightening process, ensuring that the logical sequence of "limiting first, then tightening" is reliably executed.

[0016] It also includes a lifting cylinder mounting base set on the side of the mounting beam, on which a lifting cylinder is fixedly installed, and a lifting plate is fixedly set on the telescopic end of the lifting cylinder, the length of which is greater than the distance between the two outer arms.

[0017] Equipped with lifting cylinders and lifting plates, these devices provide cushioning and positioning assistance for lifting workpieces, ensuring the outer arm smoothly lowers to the designated position and preventing positional deviations caused by impacts, thus facilitating automated loading and unloading operations.

[0018] It also includes a mounting plate arranged between the rectangular tube frames and parallel to the mounting beam, with at least one pad provided on the upper side of the mounting plate at the connecting shaft position at one end of the outer arm.

[0019] Pads are placed on the mounting plate to support the outer arm connecting shaft and keep it horizontal, ensuring that the mounting holes on both sides are aligned, creating favorable conditions for the smooth insertion of the positioning components, and ensuring the overall accuracy of the splicing workpiece.

[0020] Beneficial Effects: This invention, through the synergistic effect of a detachable compensating positioning sleeve and a symmetrical pneumatic positioning assembly, achieves rapid adaptation and precise positioning of various bushings before welding, laying the foundation for controlling post-weld dimensional and positional tolerances. The asymmetrically arranged clamping and limiting mechanism effectively suppresses welding deformation, ensuring the stability and alignment of the workpiece during the assembly process. By optimizing positioning and part tolerance matching, the overall system ensures that the positional accuracy and coaxiality of the post-weld mounting holes directly meet assembly requirements, thus successfully replacing the post-weld boring process. This improves efficiency, reduces costs, and ensures product quality stability and appearance consistency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention, in which the outer arm structure on one side is omitted.

[0023] Figure 2 This is a structural diagram of the present invention with a compensation positioning sleeve.

[0024] Figure 3This is a structural diagram of the non-compensating positioning sleeve of this utility model.

[0025] Figure 4 This is a cross-sectional view of the structure of the present invention with a compensation positioning sleeve.

[0026] Figure 5 This is a structural diagram of the positioning assembly of this utility model.

[0027] Figure 6 This is a structural diagram of the mounting plate and pad of this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] like Figures 1 to 6 As shown, a scissor lift arm splicing fixture includes a rectangular tube frame 1, a pneumatic device mounting part 2 fixedly disposed on both sides of the rectangular tube frame 1, and a mounting beam 3 disposed between the two sides of the rectangular tube frame 1. At least two sets of pneumatic mounting parts are distributed along the long side of the rectangular tube frame 1, and are symmetrically arranged on both sides of the rectangular tube frame 1. Pneumatic positioning components are welded and fixed on the pneumatic device mounting part 2. Any of the pneumatic positioning components includes a cylinder 4 installed on the outside of the pneumatic device mounting part 2 and a positioning rod 5 that passes through the pneumatic device mounting part 2 and is poweredly connected to the output end of the cylinder 4; the end of the positioning rod 5 is provided with a limit step surface. The pneumatic positioning assembly near the mounting hole on the side of the outer arm for connecting the work platform or the frame also includes a compensating positioning sleeve 6 that is detachably fitted onto the inner end of the positioning rod 5, and the compensating positioning sleeve 6 has a stepped surface in the middle.

[0032] This utility model's scissor lift arm splicing fixture uses a rectangular tube frame 1 as its basic structure, with multiple sets of pneumatic positioning components symmetrically arranged on both sides to ensure the overall rigidity and clamping stability of the fixture. Near-distance positioning is achieved by setting a limiting step surface at the end of the positioning rod 5, and long-distance positioning is achieved by adding a detachable compensating positioning sleeve 6 to the positioning rod 5 near the arm connection end. This forms a dual limiting structure adaptable to different installation distances, allowing the fixture to quickly adapt to the mounting holes of different fork arms, significantly improving its versatility and the positioning accuracy of robotic welding.

[0033] Any of the pneumatic positioning components further includes a guide sleeve 7 that penetrates the pneumatic device mounting part 2, the positioning rod 5 is slidably mounted in the guide sleeve 7, and the cylinder 4 is fixedly mounted on the end face of the guide sleeve 7 near the outer side.

[0034] A guide sleeve 7 is added through the pneumatic device mounting part 2, in which the positioning rod 5 is slidably installed, providing precise guidance for the movement of the positioning rod 5, effectively preventing deflection and jamming, and improving the reliability of the action and the service life of the components.

[0035] The guide sleeve 7 is internally configured with two sections of different inner diameters. The rod portion of the positioning rod 5 matches the inner diameter of the guide sleeve 7 near the outer arm. The side of the positioning rod 5 connected to the output end of the cylinder 4 is configured as a limiting platform that matches the inner diameter of the other section of the guide sleeve 7. The stroke of the positioning rod 5 is limited by the sliding space length of the limiting platform.

[0036] The guide sleeve 7 is internally divided into two sections with different inner diameters, which cooperate with the corresponding sections of the positioning rod 5 to mechanically limit its stroke. This design avoids reliance on pneumatic or electrical control, improves positioning repeatability, and is suitable for stable operation of automated production lines.

[0037] At least two mounting beams 3 are provided, located near the front and rear ends of the rectangular tube frame 1 respectively. The mounting beams 3 are provided with positioning assemblies for positioning the outer arms on both sides. The positioning assembly on any of the mounting beams 3 includes two clamping cylinders 8 disposed between the two outer arms and a limiting cylinder 9 and a limiting plate 10 disposed on the outer sides of the two outer arms. The extension and retraction ends of the two clamping cylinders 8 are in opposite directions and are used to clamp the inner sides of the outer arms on both sides respectively. The limiting cylinder 9 is disposed on the outer side of any outer arm, and the limiting plate 10 is disposed on the outer side of the other outer arm. The limiting plate 10 and the limiting cylinder 9 on the two mounting beams 3 are disposed on the same side.

[0038] The mounting beam 3 is equipped with a positioning assembly consisting of a clamping cylinder 8, a limiting cylinder 9, and a limiting plate 10, which enables bidirectional clamping and unilateral limiting, ensuring alignment and clamping reliability during the assembly process of the outer arm. The asymmetrical layout facilitates rapid separation of the tooling and workpiece after welding, improving work efficiency.

[0039] The diameter of the telescopic rod of the limiting cylinder 9 is larger than the diameter of the telescopic rod of the tightening cylinder 8.

[0040] The diameter of the telescopic rod of the limit cylinder 9 is larger than that of the clamping cylinder 8, which enhances its bending stiffness and prevents the limit cylinder 9 rod from being pushed back during the clamping process, ensuring that the logical sequence of "limiting first, then clamping" is reliably executed.

[0041] It also includes a lifting cylinder mounting base 11 set on the side of the mounting beam 3, on which a lifting cylinder 12 is fixedly installed, and a lifting plate 13 is fixedly set at the telescopic end of the lifting cylinder 12, the length of the lifting plate 13 being greater than the distance between the two outer arms.

[0042] The lifting cylinder 12 and lifting plate 13 are provided to provide buffering and positioning assistance for hoisting the workpiece, so that the outer arm can be smoothly lowered to the predetermined work position, avoiding positional deviation caused by impact, and facilitating automated loading and unloading operations.

[0043] It also includes a mounting plate 14 arranged between the rectangular tube frames 1 and parallel to the mounting beam 3, and at least one pad 15 is provided on the upper side of the mounting plate 14 at the connecting shaft position at one end of the outer arm.

[0044] A pad 15 is set on the mounting plate 14 to support the outer arm connecting shaft and keep it horizontal, ensuring that the mounting holes on both sides are aligned, creating good conditions for the smooth insertion of the positioning component, and ensuring the overall accuracy of the splicing workpiece.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A scissor lift arm splicing fixture, characterized in that: It includes a rectangular tube frame (1), a pneumatic device mounting part (2) fixedly installed on both sides of the rectangular tube frame (1), and a mounting beam (3) installed between the two sides of the rectangular tube frame (1). At least two sets of pneumatic mounting parts are distributed along the long side of the rectangular tube frame (1), and are symmetrically arranged on both sides of the rectangular tube frame (1). Pneumatic positioning components are welded and fixed on the pneumatic device mounting part (2). Any of the pneumatic positioning components includes a cylinder (4) installed on the outside of the pneumatic device mounting part (2) and a positioning rod (5) that passes through the pneumatic device mounting part (2) and is poweredly connected to the output end of the cylinder (4); the end of the positioning rod (5) is provided with a limit step surface; The pneumatic positioning assembly near the mounting hole on the side of the outer arm for connecting the work platform or the frame also includes a compensating positioning sleeve (6) that is detachably fitted on the inner side of the positioning rod (5), and the compensating positioning sleeve (6) has a stepped surface in the middle.

2. The scissor lift arm splicing fixture according to claim 1, characterized in that: Any of the pneumatic positioning components further includes a guide sleeve (7) that penetrates the pneumatic device mounting part (2), the positioning rod (5) is slidably mounted in the guide sleeve (7), and the cylinder (4) is fixedly mounted on the end face of the guide sleeve (7) near the outer side.

3. The scissor lift arm splicing fixture according to claim 2, characterized in that: The guide sleeve (7) is configured with two sections with different inner diameters. The rod part of the positioning rod (5) matches the inner diameter of the guide sleeve (7) near the outer arm. The side of the positioning rod (5) connected to the output end of the cylinder (4) is configured as a limiting platform that matches the inner diameter of the other section of the guide sleeve (7). The stroke of the positioning rod (5) is limited by the space length that the limiting platform slides.

4. The scissor lift arm splicing fixture according to claim 1, characterized in that: At least two mounting beams (3) are provided, located near the front and rear ends of the rectangular tube frame (1), and the mounting beams (3) are provided with positioning assemblies for positioning the outer arms on both sides; The positioning assembly on any of the mounting beams (3) includes two clamping cylinders (8) disposed between the two outer arms and a limiting cylinder (9) and a limiting plate (10) disposed on the outer side of the two outer arms. The extension and retraction ends of the two clamping cylinders (8) are in opposite directions and are used to clamp the inner side of the outer arms on both sides respectively. The limiting cylinder (9) is disposed on the outer side of any outer arm, and the limiting plate (10) is disposed on the outer side of the other outer arm. The limiting plate (10) and the limiting cylinder (9) on the two mounting beams (3) are disposed on the same side.

5. The scissor lift arm splicing fixture according to claim 4, characterized in that: The diameter of the telescopic rod of the limiting cylinder (9) is greater than the diameter of the telescopic rod of the tightening cylinder (8).

6. The scissor lift arm splicing fixture according to claim 1, characterized in that: It also includes a lifting cylinder mounting seat (11) set on the side of the mounting beam (3), on which a lifting cylinder (12) is fixedly installed, and a lifting plate (13) is fixedly set at the telescopic end of the lifting cylinder (12), and the length of the lifting plate (13) is greater than the distance between the two outer arms.

7. The scissor lift arm splicing fixture according to claim 1, characterized in that: It also includes a mounting plate (14) arranged between the rectangular tube frame (1) and parallel to the mounting beam (3), and at least one pad (15) is provided on the upper side of the mounting plate (14) at the connecting shaft position at one end of the outer arm.

Images