Heavy-load double-clamping-arm clamping air cylinder

Abstract

The utility model relates to the technical field of clamping mechanisms, aims to solve the technical problem that a traditional clamping cylinder is insufficient in clamping force, and discloses a heavy-load double-clamping-arm clamping cylinder which comprises an outer cylinder body and an inner cylinder body arranged in the outer cylinder body in an inverted mode, and the inner cylinder body comprises a piston and a piston rod fixedly connected with the piston. A T-shaped piece, a pair of rotating shafts distributed symmetrically and a pair of clamping arms used for rotating around the rotating shafts are arranged in the outer cylinder body, the rotating shafts are located on the two sides of the inner cylinder body respectively, the outer end of the piston rod is fixedly connected with the T-shaped piece, two connecting blocks hinged to the two ends of the T-shaped piece respectively are arranged, and the other ends of the two connecting blocks are hinged to the lower ends of the clamping arms. Shaft holes rotating around the rotating shafts are formed in the clamping arms, and the upper ends of the clamping arms are used for clamping workpieces. By the adoption of the double-clamping-arm structure and the symmetrically-distributed rotating shaft design, the clamping force and the bearing capacity are remarkably improved, a reinforcement self-locking mechanism can enable a vehicle body metal plate to be clamped more firmly and stably, and it is ensured that the follow-up welding position is accurately positioned.

Description

Technical Field

[0001] This utility model relates to the field of clamping mechanism technology, and in particular to a heavy-duty double-arm clamping cylinder. Background Technology

[0002] In sheet metal body resistance welding and quality inspection, large-diameter clamping cylinders play a crucial role in fixing workpieces and ensuring welding position accuracy. However, existing clamping cylinders still have many shortcomings in practical applications. First, their clamping force and load-bearing capacity are limited, making them inadequate in high-load, high-intensity working environments and unable to meet the needs of complex working conditions. Second, existing clamping arm designs are relatively simple, lacking diverse structural options, which limits their adaptability in different workpiece clamping scenarios, especially when clamping workpieces with complex shapes or special sizes. Furthermore, due to inadequate dustproofing measures in existing clamping cylinders, external dust and particles can easily enter the internal structure, adversely affecting the cylinder's service life and operational accuracy, increasing equipment maintenance frequency and costs.

[0003] It is evident that existing clamping cylinders have significant drawbacks, such as insufficient clamping force, limited clamping arm design, and poor dust protection, which restricts their widespread application in high-load, high-precision welding scenarios.

[0004] Therefore, there is an urgent need for a clamping cylinder with optimized structure to solve the above problems and meet the needs of modern manufacturing for efficient and reliable clamping equipment. Utility Model Content

[0005] The purpose of this invention is to provide a heavy-duty double-arm clamping cylinder to solve the technical problem of insufficient clamping force in traditional clamping cylinders.

[0006] To achieve the above objectives, this utility model provides a heavy-duty double-arm clamping cylinder, comprising an outer cylinder body and an inner cylinder body inverted within the outer cylinder body. The inner cylinder body includes a piston and a piston rod fixedly connected to the piston. The outer cylinder body is provided with a T-shaped component, a pair of symmetrically distributed rotating shafts, and a pair of clamping arms for rotating around the rotating shafts. The rotating shafts are located on both sides of the inner cylinder body. The outer end of the piston rod is fixedly connected to the T-shaped component. Two connecting blocks are provided, which are respectively hinged to both ends of the T-shaped component. The other ends of the two connecting blocks are hinged to the lower ends of the clamping arms. The clamping arms are provided with shaft holes for rotating around the rotating shafts. The upper ends of the clamping arms are used to clamp workpieces.

[0007] Furthermore, a plane bearing is installed between the shaft hole and the rotating shaft. The use of a plane bearing at the clamping arm rotating shaft significantly improves the torsional resistance and load-bearing capacity, making it more reliable under high load conditions, thus fully meeting the efficient and stable clamping requirements of modern manufacturing.

[0008] Furthermore, the clamping arm has an overall curved structure. This curved structure is rationally designed and highly adaptable, not only improving the uniformity of force distribution but also enhancing torsional resistance. It can adapt to various workpiece clamping scenarios and overcomes the shortcomings of traditional clamping cylinder clamping arms, such as their limited form.

[0009] Furthermore, a dust cover is installed at the junction of the top of the inner cylinder and the top of the outer cylinder. The optimized design of the dustproof mechanism can effectively prevent metal dust generated during welding from entering the cylinder, significantly extending the service life of the cylinder.

[0010] The heavy-duty double-arm clamping cylinder provided by this utility model has the following advantages:

[0011] This utility model's heavy-duty double-arm clamping cylinder, through optimized structural design, employs a double-arm structure and a symmetrically distributed rotating shaft design, significantly improving clamping force and load-bearing capacity, enabling it to adapt to high-load, high-intensity working environments. The hinged connection between the T-shaped component, connecting block, and clamping arms achieves a flexible and reliable transmission mechanism, accurately converting the linear motion of the piston rod into the rotational motion of the clamping arms, thus ensuring stable workpiece clamping. Its force-enhancing self-locking mechanism further strengthens and stabilizes the clamping of body panels, ensuring accurate positioning for subsequent welding. Therefore, this cylinder overcomes the shortcomings of traditional clamping cylinders in terms of insufficient clamping force.

[0012] In addition, the optimized design of the dustproof mechanism can effectively prevent metal dust generated during welding from entering the cylinder, greatly extending the service life of the cylinder; furthermore, the use of a flat bearing connection at the clamping arm shaft significantly improves the torsional resistance and load-bearing capacity, making it more reliable under high load conditions, thus fully meeting the efficient and stable clamping needs of modern manufacturing. Attached Figure Description

[0013] Figure 1 A cross-sectional view of the heavy-duty double-arm clamping cylinder provided by this utility model.

[0014] In the diagram: 11. Clamping arm; 12. Dust cover; 13. Rotating shaft; 14. Piston; 15. Connecting block; 16. T-shaped part; 17. Piston rod; 18. Surface bearing. Detailed Implementation

[0015] 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.

[0016] See Figure 1This utility model provides a heavy-duty double-arm clamping cylinder with a compact structure and reliable performance, particularly suitable for high-load, high-precision clamping operations. The clamping cylinder mainly comprises an outer cylinder body and an inner cylinder body inverted within the outer cylinder body, enabling powerful clamping and providing a long service life.

[0017] The core components of the inner cylinder include the piston 14 and the piston rod 17 fixedly connected to the piston 14. The reciprocating motion of the piston rod 17 is the key power source driving the clamping arm's movement. The outer cylinder has a precisely designed internal structure, containing a T-shaped component 16 and a pair of symmetrically distributed rotating shafts 13, both of which work together to clamp the system. The rotating shafts 13 are located on both sides of the inner cylinder, serving as the rotation center of the clamping arm 11, ensuring the smoothness and accuracy of the clamping action.

[0018] The outer end of the piston rod 17 is securely connected to the T-shaped member 16 via a robust connecting structure. Two connecting blocks 15 are hinged to both ends of the T-shaped member 16, forming a transmission system. The other ends of the two connecting blocks 15 are hinged to the lower ends of the clamping arms 11, thereby converting the linear motion of the piston rod 17 into the rotational motion of the clamping arms 11, achieving the clamping or release of the workpiece. A shaft hole for rotation around the rotating shaft 13 is provided in the middle of the clamping arm 11. To further reduce friction and improve motion efficiency, a flat bearing 18 is added between the shaft hole and the rotating shaft 13, enhancing overall operational stability and durability.

[0019] The clamping arm 11 has a circular through hole near one side in the middle, which is the aforementioned shaft hole. This hole may be used for mounting a shaft or pin. In this embodiment, it is mounted on the rotating shaft 13 and is an important part for the rotation or support of the clamping arm 11. This part is relatively thick to withstand a large torque. The bottom of the clamping arm 11 has a small circular hole, which is hinged to the connecting block 15 via a shaft or pin.

[0020] The clamping arm 11 has a curved structure, and its special geometry optimizes the force distribution, which not only enhances the strength of the lever arm but also effectively avoids stress concentration and extends its service life. The upper end of the clamping arm 11 is designed as the workpiece clamping part, which can stably clamp workpieces of various shapes and sizes to meet the needs of various application scenarios.

[0021] In addition, to protect the internal structure from external dust and other contaminants, a dust cover 12 is added at the junction of the inner and outer cylinder tops. The dust cover 12 not only effectively improves the durability of the equipment but also reduces the maintenance frequency, further enhancing the reliability and practicality of the equipment.

[0022] Cylinder clamping and opening principle

[0023] Cylinder clamping: The piston drives the piston rod, causing the piston to move downwards. Through the crank-connecting rod mechanism of the T-shaped component 16 and the connecting block 15, the left clamping arm in the diagram rotates clockwise around the left axis and counterclockwise around the right axis. Upon reaching the clamping position, the cylinder self-locks, and the force-multiplying mechanism increases the clamping force of the clamping arms. Simultaneously, the flat bearing 18 bears the torque generated by the counter-clamping force, enhancing the cylinder's load-bearing capacity. Throughout the process, the dust cover effectively prevents metal dust from falling into the cylinder.

[0024] Cylinder opening: The piston 14 moves upward, causing the left clamping arm 1 to rotate counterclockwise and open, and the right clamping arm to rotate clockwise and open.

[0025] Cylinder clamping force-increasing self-locking principle

[0026] After the cylinder reaches the clamping state, the reaction force of the clamping force drives the left clamping arm to rotate counterclockwise and the right clamping arm to rotate clockwise. At this time, the radial force on the rotating shaft is perpendicular to the direction of piston movement and cannot drive the piston to move upward, thus achieving self-locking in the clamping state.

[0027] Based on feedback from multiple practical applications, this invention can effectively improve the reliability of welding during vehicle body welding and extend the service life of cylinders.

[0028] The heavy-duty double-arm clamping cylinder provided by this utility model has the following advantages:

[0029] The heavy-duty double-arm clamping cylinder provided by this utility model has significant advantages through structural optimization and design. Its force-enhancing self-locking mechanism greatly increases the maximum clamping force, making clamping more stable and reliable; the use of a plane bearing connection at the clamping arm pivot not only effectively improves torsional resistance but also enhances load-bearing capacity, ensuring the cylinder's stability under high load conditions; the dust cover design effectively prevents metal dust generated during welding from entering the cylinder, significantly extending the cylinder's service life; furthermore, it provides a clamping arm structure different from ordinary ones, enabling it to flexibly meet the complex needs of different car body welding conditions, further improving the equipment's applicability.

[0030] In summary, this heavy-duty double-arm clamping cylinder, through the precise combination of inner and outer cylinders, piston assembly, T-shaped parts, connecting blocks, and clamping arms, forms a compact structure capable of stable clamping action under high load conditions. It is widely applicable to various industrial fields such as machining and automated assembly, meeting the needs of modern manufacturing for efficient, stable, and durable clamping equipment.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heavy-duty double-arm clamping cylinder, comprising an outer cylinder body and an inner cylinder body inverted within the outer cylinder body, wherein the inner cylinder body comprises a piston (14) and a piston rod (17) fixedly connected to the piston (14), characterized in that, The outer cylinder is provided with a T-shaped part (16), a pair of symmetrically distributed rotating shafts (13), and a pair of clamping arms (11) for rotating around the rotating shafts (13). The rotating shafts (13) are located on both sides of the inner cylinder. The outer end of the piston rod (17) is fixedly connected to the T-shaped part (16). Two connecting blocks (15) are provided, which are respectively hinged to both ends of the T-shaped part (16). The other end of the two connecting blocks (15) is hinged to the lower end of the clamping arms (11). The clamping arms (11) are provided with shaft holes for rotating around the rotating shafts (13). The upper end of the clamping arms (11) is used to clamp the workpiece.

2. The heavy-duty double-arm clamping cylinder according to claim 1, characterized in that, A plane bearing (18) is also provided between the shaft hole and the rotating shaft (13).

3. The heavy-duty double-arm clamping cylinder according to claim 1, characterized in that, The clamp arm (11) has a curved structure as a whole.

4. The heavy-duty double-arm clamping cylinder according to claim 1, characterized in that, A dust cover (12) is also provided at the junction of the top of the inner cylinder and the top of the outer cylinder.

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