Double-hook clamping cylinder

Abstract

The utility model relates to the technical field of clamping mechanisms, aims to solve the technical problems of unstable clamping, poor uniform stress and insufficient durability of a traditional clamping mechanism, and discloses a double-hook clamping cylinder which is provided with a piston rod partially positioned in a lower cylinder body, and a clamping seat is arranged at the top of an upper cylinder body. A pair of connecting rods and a pair of hook-shaped pieces with main body parts located in the upper cylinder body are arranged in the upper cylinder body, the two ends of each connecting rod are hinged to the top of the piston rod and the bottom of the corresponding hook-shaped piece respectively, a shaft hole serving as a rotating fulcrum is formed in the middle of each hook-shaped piece, and a positioning shaft used for the hook-shaped pieces to move around the shaft is arranged in the upper cylinder body. The hook-shaped piece is installed on the positioning shaft through the shaft hole, and a hook claw matched with the clamping base to clamp a workpiece is arranged at the top of the hook-shaped piece. The connecting rod is hinged to the piston rod and the bottom of the hook-shaped piece, so that synchronous movement and stable clamping of the hook-shaped piece are guaranteed; and the shaft hole is matched with the positioning shaft to form a reliable rotating fulcrum, so that the accuracy and the stability in the clamping process are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to clamping mechanism technical field especially relates to a double hook clamping cylinder. BACKGROUND

[0002] With the rapid development of industrial production and the continuous improvement of automation level, the performance requirements of workpiece clamping devices in various industries are becoming increasingly strict. On the production line, the clamping mechanism not only needs to realize accurate and stable operation, but also must have good adaptability to meet the needs of various complex shapes or special materials of workpieces. However, due to the limitations of design and function, the traditional clamping method has gradually been difficult to meet the high efficiency and high precision requirements of modern industry. Under this background, the double hook clamping mechanism as a new type of design is proposed as an important means to solve this problem.

[0003] At present, there are various types of clamping mechanisms on the market, including single hook clamping, spring clamping, hydraulic clamping and other traditional designs, but their stability and adaptability in specific application scenarios still have significant shortcomings, especially in the field of automobile welding assembly process. For specific application scenarios in this field, such as the need to handle complex shape, irregular size or surface sensitive double groove shaped workpieces, traditional clamping mechanisms often fail to achieve the desired clamping effect. The main problems are as follows:

[0004] First, easy to damage: since the double hook clamping mechanism usually fixes the object by friction, it will wear out during use, causing damage to the clamp components, thereby affecting the stability and service life of the clamp.

[0005] Second, unstable operation: when the double hook clamps the object, it needs to control the opening and closing force of the clamp accurately, otherwise it will cause unstable clamping, insufficient clamping force and other problems, thereby affecting work efficiency.

[0006] As a result, the clamping stability is poor, the uniform stress is difficult to guarantee, the protection of the workpiece surface is insufficient, and the operation complexity is high. Especially in the case of long time high frequency use, the durability and reliability of the traditional clamping mechanism also have big problems. INVENTION CONTENTS

[0007] The utility model aims at providing a double hook clamping cylinder to solve the technical problems of unstable clamping, poor uniform stress and insufficient durability of traditional clamping mechanisms.

[0008] To achieve the above object, the utility model provides a double hook clamping pneumatic cylinder, including upper cylinder body and lower cylinder body, is provided with the piston rod that part is in lower cylinder body, the top of upper cylinder body is provided with a pair of clamping seat, is provided with a pair of connecting rod in upper cylinder body and the pair of hook shape spare that main part is in upper cylinder body, both ends of connecting rod are hinged with the top of piston rod, the bottom of hook shape spare, the middle part of hook shape spare is provided with the axle hole that is the rotary fulcrum, is provided with the positioning axle that is used for hook shape spare around axle movement in upper cylinder body, hook shape spare is installed in positioning axle through axle hole, the top of hook shape spare is provided with the hook claw that cooperates with clamping seat and clamps work piece.

[0009] Further, the clamping seat includes a first clamping seat and a second clamping seat, the height of the first clamping seat is greater than the height of the second clamping seat, the hook shape piece includes a first hook shape piece and a second hook shape piece, the height of the first hook shape piece is greater than the height of the second hook shape piece. Asymmetrical clamping structure is formed, so that the clamping mechanism can better adapt to the workpiece with complex shape or inconsistent height, avoiding the problem of unstable clamping or uneven force in the traditional symmetrical clamping structure.

[0010] The double hook clamping pneumatic cylinder provided by the utility model has the following advantages:

[0011] The utility model discloses a double hook clamping pneumatic cylinder, including upper cylinder body and lower cylinder body, is provided with the piston rod that part is in lower cylinder body, realized compact structure and function integration through setting up upper cylinder body, lower cylinder body and part in lower cylinder body's piston rod, realize compact structure and function integration through setting up upper cylinder body, lower cylinder body and part in lower cylinder body's piston rod, through setting up a pair of connecting rod and hook shape spare in upper cylinder body, and through connecting rod and piston rod and hook shape spare bottom hinged, ensure the synchronous movement and stable clamping of hook shape spare, the axle hole in the middle part of hook shape spare cooperates with positioning axle, forms reliable rotary fulcrum, improves the accuracy and stability of clamping process, the hook claw on the top of hook shape spare cooperates with clamping seat and clamps work piece, not only can firmly hold the workpiece of different shape and size, but also can guarantee uniform stress through structural design, effectively solve the problem of unstable clamping, uneven force and difficult to adapt to complex workpiece of traditional clamping mechanism, and its mechanical structure is simple and durable, easy to maintain, improves the service life and work efficiency of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the double hook clamping pneumatic cylinder arm clamping state sectional view provided by the utility model;

[0013] Fig. 2 It is the double hook clamping pneumatic cylinder arm opening state sectional view provided by the utility model;

[0014] Fig. 3 It is the piston rod and one connecting rod and hook shape piece connection structure diagram provided by the utility model.

[0015] In the figure: 11, first connecting rod; 12, first hook-shaped component; 13, first hinge shaft; 14, first fixed shaft; 21, second connecting rod; 22, second hook-shaped component; 221, hook claw; 23, second hinge shaft; 24, second fixed shaft; 31, piston rod; 32, pin shaft; 33, first clamping seat; 34, second clamping seat. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0017] See Figs. 1 to 3 This utility model provides an improved double-hook clamping cylinder, which includes an upper cylinder body and a lower cylinder body, and a piston rod 3131 partially located in the lower cylinder body. A first clamping seat 33 and a second clamping seat 34 are provided at the top of the upper cylinder body, wherein the height of the first clamping seat 33 is greater than the height of the second clamping seat 34, thus forming an asymmetrical clamping structure in terms of shape design. A first connecting rod 11 and a second connecting rod 21 are also provided in the upper cylinder body, and the bottoms of these two connecting rods are hinged to the piston rod 31 via a pin 32, forming a linkage transmission structure.

[0018] Inside the upper cylinder, a pair of hook-shaped components are provided. The upper part of each hook-shaped component has a claw 221 extending from the upper cylinder body for easy clamping of the workpiece. The hook-shaped components consist of a first hook-shaped component 12 and a second hook-shaped component 22, wherein the height of the first hook-shaped component 12 is greater than the height of the second hook-shaped component 22, facilitating an asymmetrical clamping design with the clamping seat. The bottom of the first hook-shaped component 12 is hinged to the upper part of the first connecting rod 11 via a first hinge shaft 13, while the bottom of the second hook-shaped component 22 is hinged to the upper part of the second connecting rod 21 via a second hinge shaft 23. Furthermore, both the first hook-shaped component 12 and the second hook-shaped component 22 have shaft holes in their middle sections, which serve as rotation fulcrums, allowing the hook-shaped components to rotate around them. Two positioning shafts for mounting the hook-shaped components are also arranged inside the upper cylinder. The hook-shaped components are mounted on these positioning shafts through the shaft holes, ensuring precise positioning and stability during movement.

[0019] Because the height of the first clamping seat 33 is greater than the height of the second clamping seat 34, and the height of the first hook-shaped member 12 is greater than the height of the second hook-shaped member 22, an asymmetrical clamping structure is formed. This structure is not only more flexible in terms of spatial arrangement, but also has higher adaptability and reliability in terms of performance.

[0020] The core of this double-hook clamping mechanism lies in its structural design. It consists of two independent hook-shaped components that move synchronously through a pneumatic cylinder. Each hook-shaped component is designed with a certain degree of flexibility or adjustability to better accommodate workpieces of different shapes and sizes. This flexible structure allows the clamping mechanism to be widely used in industrial production, especially for clamping complex-shaped workpieces.

[0021] Working principle

[0022] When a workpiece needs to be clamped, the two hook-shaped components of the double-hook clamping mechanism move towards the workpiece simultaneously under the drive of the pneumatic cylinder. As the hook-shaped components move forward, their hook claws 221 firmly clamp the workpiece, forming a stable clamping state. This clamping method not only provides reliable fixation, but also accommodates workpieces of various complex shapes or irregular sizes. The double-hook design achieves good balance during clamping, making the entire mechanism more stable and avoiding deviation or sliding due to asymmetric forces.

[0023] The clamping action of this mechanism is driven by the pneumatic cylinder of the lower cylinder body, which pushes the connecting rod to move, providing a force amplification effect for the clamping action through the lever principle. The design of the double-hook claws 221 allows them to clamp two clamping seats simultaneously on both sides, and through the connecting rod, it achieves coordinated and consistent lever force amplification clamping, ensuring the secure fixation of the workpiece.

[0024] Practical performance test

[0025] To verify the actual effect of the double-hook clamping mechanism, multiple experimental tests were conducted. During the clamping of workpieces, the force values generated during clamping were checked one by one to ensure that the force values were always higher than the force values generated by the pneumatic cylinder. At the same time, in order to evaluate the durability and performance stability of the mechanism, not less than 50 independent clamping tests were conducted on the double-hook clamping mechanism. In these tests, the force values generated by each clamping were strictly recorded, and the upper and lower limit errors of the specified force values were not more than ±3%. The experimental results show that the double-hook clamping mechanism performs excellently in all tests, with stable clamping force values within the specified range, and the clamping effect meets the design requirements.

[0026] Through such structural optimization and performance verification, the double-hook clamping pneumatic cylinder not only has high-efficiency and stable clamping capability, but also exhibits high adaptability and reliability, providing an ideal solution for complex clamping needs in industrial production.

[0027] The double-hook clamping pneumatic cylinder provided by the utility model has the following advantages:

[0028] The clamping effect is good, the lever force clamping is realized through the connecting rod, and uniform clamping of the double-groove-shaped workpiece can be ensured. The stability is high, the clamping body has sufficient strength and rigidity, and the stability of the mechanism during clamping can be ensured. The operation is simple, and the clamping part can be driven to move and rotate through the rotating screw rod, and the operation is simple and convenient.

[0029] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-hook clamping cylinder, comprising an upper cylinder body and a lower cylinder body, wherein a piston rod (31) is partially located within the lower cylinder body, and a pair of clamping seats are provided at the top of the upper cylinder body, characterized in that, The upper cylinder is provided with a pair of connecting rods and a pair of hook-shaped parts whose main body is located in the upper cylinder. The two ends of the connecting rods are respectively hinged to the top of the piston rod (31) and the bottom of the hook-shaped parts. The middle part of the hook-shaped parts is provided with a shaft hole as a rotation fulcrum. The upper cylinder is provided with a positioning shaft for the hook-shaped parts to move around the shaft. The hook-shaped parts are installed on the positioning shaft through the shaft hole. The top of the hook-shaped parts is provided with a claw (221) that cooperates with the clamping seat to clamp the workpiece.

2. The double-hook clamping cylinder according to claim 1, characterized in that, The clamping seat includes a first clamping seat (33) and a second clamping seat (34), the height of the first clamping seat (33) is greater than the height of the second clamping seat (34), and the hook-shaped part includes a first hook-shaped part (12) and a second hook-shaped part (22), the height of the first hook-shaped part (12) is greater than the height of the second hook-shaped part (22).

3. The double-hook clamping cylinder according to claim 1, characterized in that, The piston rod (31) is hinged to the bottom of the connecting rod via a first hinge shaft (13), and the hook-shaped member is hinged to the top of the connecting rod via a second hinge shaft (23).

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