Sheet metal clamping cylinder

Abstract

The invention relates to the technical field of clamping mechanisms, and discloses a sheet metal clamping air cylinder in order to solve the technical problems that an existing product lacks a self-locking function, stability of a workpiece is difficult to keep, and accurate clamping is difficult to achieve, the sheet metal clamping air cylinder comprises an upper cylinder body and a lower cylinder body, a piston is arranged in the lower cylinder body, and the piston is fixedly connected with a piston rod; a first air port and a second air port are formed in the upper portion and the lower portion of the lower cylinder body respectively, a connecting plate is fixedly connected to the lower cylinder body, a piston rod penetrates through the connecting plate and extends into the upper cylinder body, a clamping arm partially located in the upper cylinder body is arranged, a clamping screw is installed at the top of the clamping arm, and a smooth protruding structure is formed at the bottom of the clamping arm. A shaft hole and a crescent hole are formed in the smooth protruding structure, the clamping arm can rotate around a rotating shaft arranged in the shaft hole, and a shaft sleeve fixedly connected with the piston rod is arranged in the crescent hole. A clamping machine is self-locked, a set screw is matched with a clamping screw, so that the clamping position is rotationally adjustable, adjustment can be carried out according to different positions of clamping points, and field adjustment is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of clamping mechanisms, and in particular to a sheet metal clamping cylinder. Background Art

[0002] Clamping cylinders play an indispensable role in sheet metal body manufacturing and control logic design. Especially in the sheet metal processing industry, clamping cylinders, as a key tool, can effectively help workers stabilize workpieces, reduce physical labor and improve production efficiency. Its use not only greatly reduces the operating burden of workers, but also ensures that the workpieces remain in the correct position during assembly and processing, thereby greatly improving production quality and speed.

[0003] In sheet metal clamps, clamping screws are a common fixing method that uses screws to clamp two parts. This structure allows for quick disassembly and replacement of parts, and is particularly suitable for scenarios that require frequent maintenance and replacement. The screw clamping method achieves fastening through simple mechanical principles, ensuring stability and safety during operation, while also being cost-effective. However, the prior art still has many deficiencies in cylinder clamping and positioning.

[0004] First, a major drawback of current technology is that the clamping cylinder lacks a self-locking function. After the cylinder completes the clamping action, if the air pressure in the cylinder body decreases or completely loses pressure, the cylinder will not be able to maintain the clamping state, causing the workpiece to lose its fixation. This problem may occur in the event of a power outage or air source failure, causing the workpiece to loosen and even cause safety hazards. Therefore, how to keep the workpiece stably fixed when the cylinder loses pressure has become an urgent problem to be solved.

[0005] Secondly, the current clamping cylinder position is relatively fixed and lacks flexible adjustment functions. The clamping cylinder itself cannot adjust the angle according to the positioning accuracy of different workpieces, which means that when the cylinder faces workpieces of different shapes and sizes, it may not be able to adapt to the ideal clamping angle, affecting the final processing accuracy. This single clamping position not only limits the adaptability of the equipment, but also reduces the processing efficiency to a certain extent.

[0006] In summary, these limitations of existing technologies indicate that the application potential of clamping cylinders in the control logic design of sheet metal bodies has not yet been fully realized. How to optimize the self-locking function of the cylinder and achieve multi-angle clamping positioning will be an important direction to promote the intelligent and precise development of the sheet metal processing industry. Summary of the invention

[0007] The purpose of the present invention is to provide a sheet metal clamping cylinder to solve the technical problem that the existing clamping cylinder lacks a self-locking function and cannot flexibly adjust the angle according to the shape and positioning requirements of different workpieces, resulting in difficulty in maintaining the stability of the workpiece and achieving precise clamping when the air pressure is insufficient or when facing a variety of workpieces.

[0008] To achieve the above object, the present invention provides a sheet metal clamping cylinder.

[0009] A sheet metal clamping cylinder comprises an upper cylinder body and a lower cylinder body, wherein a piston is arranged in the lower cylinder body, and a piston is fixedly connected to the piston rod, and a first air port and a second air port are respectively arranged at the upper and lower parts of the lower cylinder body, and a connecting plate is fixedly connected to the lower cylinder body, and the piston rod passes through the connecting plate and extends into the upper cylinder body, and a clamping arm partially located in the upper cylinder body is arranged, and a clamping screw is installed on the top of the clamping arm, and a smooth ridge structure is formed at the bottom of the clamping arm, and an axial hole and a crescent hole are arranged in the smooth ridge structure, and the clamping arm can rotate around a rotating shaft arranged in the axial hole, and a shaft sleeve fixedly connected to the piston rod is arranged in the crescent hole, and the shaft sleeve is driven to slide in the crescent hole through the up and down movement of the piston rod, thereby realizing the rotation of the clamping arm, and the clamping screw is used to clamp or release the workpiece.

[0010] The present invention designs a crescent hole structure at the bottom of the sleeve and the clamp arm. When clamping a workpiece, the force direction of the sleeve is perpendicular to the movement direction of the piston rod, thereby preventing the piston rod from rising due to insufficient air pressure or loss of pressure, thereby achieving mechanical self-locking. Even in the event of a gas or power outage, the clamping force can remain unchanged, effectively preventing the workpiece from loosening, and improving the safety and reliability of the equipment.

[0011] Through the design of the rotatable adjustment of the clamp arm, the present invention allows the clamping angle of the clamp arm to be flexibly adjusted according to the different shapes and sizes of the workpiece. By loosening the set screw and the clamping screw on the clamp arm, the clamp arm can be infinitely rotated and adjusted according to the position of different workpieces to adapt to the clamping position of different workpieces, thereby improving the applicability of the equipment and increasing the flexibility and operating convenience of the clamping cylinder in the processing of diversified workpieces.

[0012] The present invention adopts a smooth raised structure at the bottom of the clamp arm and arranges a crescent hole therein, so that the sleeve can slide smoothly along the crescent hole when the clamp arm moves, ensuring that the rotation of the clamp arm has a stable motion trajectory, avoiding jamming or instability during the clamping process, thereby further improving the accuracy and efficiency of clamping and releasing the workpiece.

[0013] The design structure of the present invention is simple, and the piston rod drives the sleeve to slide, directly driving the opening and closing of the clamp arm, which is simple to operate and easy to maintain. This structure makes the overall volume of the cylinder relatively small, and is suitable for workpiece clamping operations in various automation equipment.

[0014] Therefore, the present invention not only solves the problems of lack of self-locking function and limited angle adjustment of the existing sheet metal clamping cylinder, but also greatly improves the safety, adaptability and stability of the cylinder.

[0015] Furthermore, the clamp arm is in a curved L-shaped structure as a whole, and the top of the clamp arm is fixedly connected to the clamping screw.

[0016] The L-shaped clamp arm structure can optimize the mechanical distribution during the clamping process, ensure that the clamp arm can better resist external stress when applying clamping force, and improve the stability and reliability of clamping. In addition, the L-shaped structure can reduce the deformation of the clamp arm during the clamping process, ensure the accuracy of the workpiece clamping position, especially maintain the stable positioning of the workpiece during the processing, further improving the processing quality and clamping reliability.

[0017] Furthermore, the upper cylinder body and the connecting plate are locked and fixed by two oppositely arranged set screws and a clamping screw.

[0018] The two set screws set opposite to each other can effectively realize the rotation adjustment of the clamp arm, and firmly fix it after adjustment to prevent the clamp arm from unexpected angle changes during operation. This design ensures that the clamp arm can be flexibly adjusted according to the clamping requirements of different workpieces, with strong adaptability, especially when facing diverse workpiece shapes and sizes, the angle can be flexibly adjusted to improve production efficiency.

[0019] The clamping screw is further tightened to ensure the stability and safety of the clamping arm after adjustment, to prevent the clamping arm from loosening or position shifting, thus ensuring high precision and stability when clamping the workpiece. This multi-level locking structure not only improves the clamping capacity of the cylinder, but also enhances the reliability of the entire system, and is suitable for use in high-intensity and long-term workpiece processing.

[0020] The sheet metal clamping cylinder provided by the present invention has the following advantages:

[0021] The sheet metal clamping cylinder of the present invention realizes the mechanical self-locking function through the shaft sleeve and the crescent hole structure, and can maintain a stable clamping force even when the air pressure is insufficient or lost, ensuring that the workpiece does not loosen, thereby improving the safety and reliability of the equipment. The double locking structure of the set screw and the clamping screw enables the clamping arm to be flexibly adjusted in angle to adapt to the shapes and sizes of different workpieces, ensuring that the clamping position is infinitely adjustable, and facilitating rapid adjustment on site, greatly improving the adaptability and operational convenience of the equipment in the processing of diversified workpieces. The L-shaped design of the clamping arm optimizes the mechanical distribution, ensuring stability and precision during the clamping process, reducing deformation, and improving the clamping effect and processing quality of the workpiece. The overall structural design is simple and easy to maintain, and is equipped with a toothed screw to facilitate the disassembly and replacement of components. It is suitable for workpiece clamping operations in a variety of automated equipment, further improving production efficiency and equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of the clamping state of the clamping arm of the sheet metal clamping cylinder provided by the present invention;

[0023] Figure 2 A cross-sectional view of the sheet metal clamping cylinder clamp arm in an open state provided by the present invention;

[0024] Figure 3 A cross-sectional view of the rotationally adjustable structure of the clamping plate provided by the present invention;

[0025] Figure 4 An exploded view of the sheet metal clamping cylinder provided by the present invention;

[0026] Figure 5 A three-dimensional structural diagram of a sheet metal clamping cylinder provided by the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the sheet metal clamping cylinder clamping arm and the clamping position at 30 degrees provided by the present invention.

[0028] In the figure: 10, connecting plate; 20, upper cylinder body; 30, lower cylinder body; 11, set screw; 12, clamping screw; 13, first through hole; 14, second through hole; 21, clamping screw; 22, clamping arm; 23, swivel; 24, bushing; 25, steel sheet; 26, piston rod; 27, piston; 28, first air port; 29, second air port; 201, positioning shaft; 202, positioning hole; 31, mounting screw. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] See also Figure 1 and Figure 2 The present invention provides a sheet metal clamping cylinder, including an upper cylinder body and a lower cylinder body, a connecting plate 10 is fixedly connected to the lower cylinder body, a piston 27 is arranged in the lower cylinder body, the piston 27 is fixedly connected to the piston rod 26, the upper part and the lower top of the lower cylinder body are respectively provided with a first air port 28 and a second air port 29, the piston rod 26 passes through the connecting plate 10 and extends into the upper cylinder body, a clamping arm 22 is provided which is partially located in the upper cylinder body, the clamping arm 22 is in a bent L-shape as a whole, and clamping screws 21 are respectively installed on the top of the clamping arm 22 and the top of the upper cylinder body, and the two clamping screws 21 are used together to clamp the workpiece.

[0031] A smooth raised structure is formed at the bottom of the clamp arm 22, and an axial hole and a crescent hole are arranged in the smooth raised structure. A rotating shaft 23 supporting the clamp arm 22 is arranged in the upper cylinder body. The rotating shaft 23 is the rotation fulcrum of the clamp arm. The clamp arm 22 can rotate around the rotating shaft 23 through the axial hole to realize the clamping action.

[0032] A sleeve 24 is arranged in the crescent hole, and the sleeve 24 is fixedly connected to the piston rod 26. The crescent hole is located in the arc-shaped area at the bottom of the clamp arm 22 to accommodate the sleeve 24, ensuring that the clamp arm 22 has a smooth motion trajectory when rotating. The clamp arm can be rotated around the rotating shaft 23 by being fixed in a certain position by the rotating shaft 23 to achieve the opening and closing action. The crescent hole is located at the end below the clamp arm, and its shape is similar to an arc-shaped through groove, which plays a limiting or guiding role, ensuring that the clamp arm maintains a specific path when rotating.

[0033] The clamping screw 21 at the top of the clamping arm 22 and the top of the upper cylinder body is used to clamp and release the workpiece. The lower cylinder body drives the clamping arm 22 to rotate around the rotating shaft 23 by driving the piston 27 and the piston rod 26 to clamp and release the workpiece.

[0034] The rotation range of the clamping arm 22 is limited by the length of the crescent hole. The piston rod 26 drives the sleeve 24 to move up and down. When the sleeve 24 moves to the bottom of the crescent hole, the clamping screws 21 at the top of the clamping arm 22 and the top of the upper cylinder body clamp the workpiece; when the sleeve 24 moves to the top of the crescent hole, the clamping screws 21 at the top of the clamping arm 22 and the top of the upper cylinder body are loosened to the maximum distance.

[0035] Bushing and piston rod 26: Bushing is fixed on piston rod 26, and piston rod drives bushing to slide in crescent hole 25, thereby driving clamp arm to rotate.

[0036] Specific working principle of clamping cylinder action

[0037] Clamping process: When the first air port 28 of the cylinder is filled with air, the gas pushes the piston downward, driving the piston rod 26 and the sleeve 24 thereon to move downward together. The sleeve 24 slides in the crescent hole at the bottom of the clamp arm 22, pushing the clamp arm 22 to rotate clockwise around the rotating shaft 23. As the clamp arm rotates, the clamping screw 21 applies pressure downward to tighten the workpiece, thus achieving the clamping action.

[0038] Opening process: When air is taken into the second air port 29 of the cylinder, the gas pushes the piston 27 to move upward, and the piston rod 27 rises accordingly, driving the sleeve 24 to slide in the opposite direction in the crescent hole, and the clamping arm 22 rotates counterclockwise around the rotating shaft 23 to loosen the clamping of the workpiece and release the workpiece.

[0039] Clamping mechanical self-locking principle

[0040] When the cylinder reaches the clamping state, the clamping force will generate a reaction force, driving the clamp arm 22 to rotate counterclockwise. However, the direction of the reaction force on the sleeve 24 is perpendicular to the movement direction of the piston 27, and the piston 27 cannot be driven to move upward. Since the piston 27 cannot move, the clamp arm 22 is in a locked state, thereby achieving mechanical self-locking. Even if the cylinder stops supplying air, the clamping force can remain unchanged to prevent the workpiece from loosening.

[0041] See also Figure 3 In one embodiment, the connecting plate 10 includes an external fixing area and an internal fixing area, the external fixing area is provided with a first through hole 13 for fixing to other equipment, and the internal fixing area is provided with a second through hole 14 for the piston rod 26 to pass through, the first through hole 13 and the second through hole 14 are circular holes, and the diameter of the first through hole 13 is larger than the diameter of the second through hole 14. The internal fixing area is used to fix the connecting plate 10 to the upper cylinder body 20, and the outer periphery of the second through hole 14 is provided with an annular groove, and the annular groove and the second through hole 14 form a stepped groove, and the annular groove is provided with two oppositely arranged set screws 11, and a clamping screw 12 penetrating the side of the annular groove is also provided.

[0042] See also Figure 4 The bottom of the upper cylinder 20 is provided with a positioning shaft 201, and a plurality of positioning holes 202 are provided on the circumference of the positioning shaft 201. The positioning shaft 201 is used to be inserted into the second through hole 14. The set screw 11 fixes the positioning shaft 201 through the positioning hole 202. The set screw is connected to the connecting plate 10 and the positioning shaft 201 at the same time to achieve a fixed connection. The lower cylinder 30 is provided with a mounting screw 31, which passes through the lower cylinder 30 and is fixedly connected to the connecting plate 10.

[0043] Figure 5 and Figure 6 Two different angle states are shown respectively, and the rotation adjustable principle is as follows:

[0044] When installing the cylinder, in order to ensure its long-term performance, the cylinder needs to be fixed, and then the clamping position is aligned with the workpiece, so that the main body with the clamping arm (upper cylinder body) can rotate infinitely according to the clamping position.

[0045] In order to ensure that the cylinder can adapt to the clamping position of different workpieces during installation, the structure of the cylinder clamp arm 22 is designed as a rotating mechanism with adjustable angle. During installation, the two M4 set screws 11 and the clamp screw 12 on the clamp arm body can be loosened and rotated according to the angle. The alignment position of the clamp arm 22 and the workpiece can be adjusted by rotation according to actual needs. After the adjustment is completed, the clamp arm position is fixed by tightening the clamp screw 12 and the M4 set screw 11 again to ensure the stable operation of the cylinder.

[0046] The adjustment can be performed by positioning two M4 set screws 11 and the positioning holes 202 of corresponding angles to inhibit rotation, and locking by the clamping screws 12 to improve the positioning of the mounting connecting plate 10 and the clamping arm body (upper cylinder body 20).

[0047] Through this design, the clamping arm 22 can be infinitely rotated and adjusted according to the position of the workpiece, so that it can be flexibly used in different installation environments to ensure an efficient clamping effect.

[0048] The sheet metal clamping cylinder clamp arm has the characteristics of simple structure, convenient operation, and high mechanical self-locking safety. It is suitable for workpiece clamping operations in various automation devices. Through flexible adjustment of the rotation position and reliable mechanical self-locking function, the cylinder clamp arm can effectively improve the efficiency and stability of the production line.

[0049] The sheet metal clamping cylinder provided by the present invention has the following advantages:

[0050] By changing the clamping point, the stability and accuracy of the sheet metal during processing or assembly are tested. The clamping mechanism is self-locking, and the set screw and clamping screw make the clamping position rotatable and adjustable. It can be adjusted according to the different positions of the clamping point, which is convenient for on-site adjustment.

[0051] The mechanical self-locking function is realized through the shaft sleeve and the crescent hole structure. Even in the case of insufficient or lost air pressure, the clamping force can be maintained, ensuring the stability and safety of the workpiece, avoiding loosening, and enhancing the reliability of the equipment. The clamp arm can be flexibly rotated and adjusted, and can be infinitely adjusted according to the shape and size of different workpieces, so that the clamping angle can flexibly adapt to the needs of diversified workpieces, improving the applicability and operation convenience of the cylinder, especially showing high flexibility when processing workpieces of different specifications. The L-shaped design of the clamp arm optimizes the mechanical distribution, ensures the stability and precision during the clamping process, reduces deformation, and further improves the clamping effect and processing quality of the workpiece. Through the double locking of the set screw and the clamping screw, the adjusted angle can be firmly fixed, preventing the displacement or loosening of the clamp arm during operation, ensuring a high-precision clamping effect, and also improving the durability and stability of the cylinder in long-term, high-intensity operation. The overall design structure is simple, easy to operate, and easy to maintain. It is suitable for various automation equipment, further optimizing production efficiency and improving the safety and reliability of the equipment. This clamping cylinder not only has a toothed screw that allows the removal and replacement of components, but also makes the clamping arm and clamping position infinitely adjustable.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sheet metal clamping cylinder, comprising an upper cylinder body and a lower cylinder body, wherein a piston (27) is arranged in the lower cylinder body, and the piston (27) is fixedly connected to a piston rod (26), and the upper part and the lower part of the lower cylinder body are respectively provided with a first air port (28) and a second air port (29), characterized in that: The lower cylinder body is fixedly connected with a connecting plate (10), the piston rod (26) passes through the connecting plate (10) and extends into the upper cylinder body, and a clamping arm (22) is provided which is partially located in the upper cylinder body, and a clamping screw (21) is installed on the top of the clamping arm (22), and a smooth raised structure is formed at the bottom of the clamping arm (22), and an axial hole and a crescent hole are arranged in the smooth raised structure, and the clamping arm (22) can rotate around a rotating shaft (23) arranged in the axial hole, and a shaft sleeve (24) fixedly connected to the piston rod (26) is arranged in the crescent hole, and the shaft sleeve (24) is driven to slide in the crescent hole by the up and down movement of the piston rod (26), thereby realizing the rotation of the clamping arm (22), and the clamping screw (21) is used to clamp or release the workpiece.

2. The sheet metal clamping cylinder according to claim 1, characterized in that: The clamp arm (22) is in a curved L-shaped structure as a whole, and the top of the clamp arm (22) is fixedly connected to the clamping screw (21).

3. The sheet metal clamping cylinder according to claim 1, characterized in that: The upper cylinder body and the connecting plate (10) are locked and fixed by two oppositely arranged set screws (11) and a clamping screw (12).

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