Metal plate double-arm clamping air cylinder

Abstract

The utility model relates to the technical field of clamping mechanisms, aims to solve the technical problem that the opening angle of an existing clamping cylinder is too small to limit extension of a transmission mechanism, and discloses a sheet metal double-arm clamping cylinder which comprises a cylinder body and the transmission mechanism above the cylinder body, a piston is arranged in the cylinder body, and a piston rod is arranged in the cylinder body and partially located in the cylinder body. The bottom of the piston rod is fixedly connected with the piston, the upper portion and the lower portion of the cylinder body are provided with a first air port and a second air port respectively, the top of the piston rod is connected with a transverse shaft sleeve and provided with a set of symmetrical clamping arms, clamping screws are installed on the tops of the clamping arms, and crescent holes in sliding connection with the shaft sleeve are formed in the bottoms of the clamping arms. Shaft holes are formed in the middles of the clamping arms, and the clamping arms can rotate around rotating shafts arranged in the shaft holes. The piston rod moves up and down to drive the shaft sleeve to slide in the crescent hole, so that rotation of the clamping arms is achieved, the two symmetrical clamping arms are arranged, large-angle opening is achieved to adapt to a larger workpiece, and enough space is provided for a transmission mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to clamping mechanism technical field especially relates to a sheet metal double -armed clamping cylinder. BACKGROUND

[0002] The clamping cylinder plays an important role in the quality detection of sheet metal body resistance welding. During the welding process, the clamping cylinder can stably fix the sheet metal parts, ensuring the accuracy of the welding position. This not only helps to form uniform welding points, but also improves the welding strength and quality. By using the clamping cylinder, human operation errors can be reduced, product production efficiency and product consistency can be improved. In the quality detection link, the accurate control of the clamping cylinder is crucial for evaluating the welding quality. It can ensure the accuracy and reliability of the detection results. Therefore, the clamping cylinder is an indispensable part of sheet metal body resistance welding, providing important technical support for the automobile manufacturing industry.

[0003] The shortcomings of the prior art mainly include the following aspects:

[0004] First, the opening angle of the cylinder is too small, limiting the extension of the transmission mechanism

[0005] The clamping cylinder widely used at present is usually limited in structure and space in design, and its opening angle is small. This limitation directly affects the free extension range of the transmission mechanism, making it difficult for the cylinder to meet the positioning needs of multiple angles and directions in the welding process of complex sheet metal workpieces. This not only reduces the flexibility of the equipment, but also may cause local interference of the workpiece during assembly, increasing the adjustment time and operation difficulty in the production process.

[0006] Second, the position of the cylinder is single when clamping, and only single-sided clamping is available

[0007] The clamping cylinder in the prior art mostly adopts single-sided clamping mode in clamping design, that is, the clamping position is usually fixed and difficult to adjust flexibly according to the shape and size of different workpieces. This single clamping method may cause some welding positions to be unable to be effectively fixed when facing diversified sheet metal parts, thereby increasing the risk of welding deformation. In addition, single-sided clamping may also cause local uneven stress during use, affecting the strength and consistency of the welding points and reducing the reliability of the overall welding quality.

[0008] In summary, although the existing clamping cylinder technology plays an important role in sheet metal body resistance welding, it still has obvious shortcomings in the activity range of the transmission mechanism and the diversity and flexibility of the clamping method. These shortcomings limit its application in complex working conditions and pose a challenge to the further improvement of welding quality. UTILITY MODEL CONTENT

[0009] The utility model discloses a purpose at providing a kind of sheet metal double-arm clamping pneumatic cylinder, to solve the technical problem that existing clamping pneumatic cylinder opening angle is too small to limit transmission mechanism stretch.

[0010] To achieve the above object, the utility model provides a kind of sheet metal double-arm clamping pneumatic cylinder, including cylinder body and the transmission mechanism being set above cylinder body, be provided with piston in cylinder body, be provided with the piston rod in part in cylinder body, the bottom of piston rod is fixedly connected with piston, the upper portion and the lower portion of cylinder body are provided with first gas port and second gas port respectively, the top of piston rod is connected with the shaft sleeve of transverse, is provided with a group of symmetrical clamping arms, and the top of clamping arm is equipped with clamping screw, and the bottom of clamping arm is formed with crescent hole slidably connected with shaft sleeve, and the middle part of clamping arm is provided with shaft hole, and clamping arm can rotate around the rotating shaft being set in shaft hole.

[0011] by the up-and-down movement of piston rod, the shaft sleeve is slid in the crescent hole, so as to realize the rotation of clamping arm, and the clamping screw is used for clamping or releasing workpiece. When the piston rod moves upward, it drives two clamping arms to open outward respectively, realizes maximum angle, can be adapted to larger workpiece, provides enough space for transmission mechanism. When the piston rod moves downward, it drives two clamping arms to tighten inward respectively, realizes the clamping of workpiece, and the clamping of double-side clamping arm is tight simultaneously. Force is applied, and the clamping is centered, which adapts to the demand of different occasions.

[0012] The utility model provides a kind of sheet metal double-arm clamping pneumatic cylinder with the following advantages:

[0013] By setting two symmetrical clamping arms, crescent hole structure is set on the clamping arm, the up-and-down movement of piston rod drives the shaft sleeve to slide in the crescent hole, realizes the flexible rotation of clamping arm, so that the clamping arm can be adapted to workpieces of different sizes and shapes when opening and clamping, greatly improves the application range of clamping pneumatic cylinder. When the piston rod moves upward, the clamping arm can open at a larger angle, effectively solving the problem that the opening angle is too small to limit transmission mechanism stretch in the prior art. When the piston rod moves downward, two clamping arms can symmetrically clamp workpieces, avoiding uneven stress caused by unilateral clamping, improving clamping stability and consistency of welding quality, while operation is more convenient, further improving production efficiency and process reliability. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the sheet metal double-arm clamping pneumatic cylinder arm open state sectional view provided by the utility model;

[0015] Figure 2 It is the sheet metal double-arm clamping pneumatic cylinder arm clamping state sectional view provided by the utility model.

[0016] In the figure: 10, connecting plate; 20, cylinder; 21, clamping screw; 22, clamping arm; 23, rotating shaft; 24, shaft sleeve; 25, steel sheet; 26, piston rod; 27, piston; 28, first air port; 29, second air port. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail with the help of the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model, and are not used to limit the utility model.

[0018] Referring to Figure 1 and Figure 2 , the utility model provides a sheet metal double -arm clamping pneumatic cylinder, including cylinder 20 and setting transmission mechanism above cylinder 20, the inside of cylinder 20 is provided with piston 27, piston 27 is connected with external transmission mechanism through piston rod 26, the bottom of piston rod 26 is fixedly connected with piston 27, can move synchronously with piston 27. The upper portion and the lower portion of cylinder 20 are provided with first air port 28 and second air port 29 respectively, can control the up-down movement of piston rod 26 through the pressure input of external gas source. The top of piston rod 26 is connected with the transverse arrangement of shaft sleeve 24, and shaft sleeve 24 is used to drive the clamping arm 22 of clamping pneumatic cylinder to realize rotation as an important component of transmission mechanism.

[0019] A group of symmetrical distribution clamping arms 22 are provided in transmission mechanism, clamping screw 21 is installed at the top of clamping arm 22, is used to realize the effective clamping or quick release of workpiece;The bottom of clamping arm 22 is designed with a crescent hole structure, and the crescent hole is slidably connected with shaft sleeve 24, when shaft sleeve 24 moves up and down under the drive of piston rod 26, the unique arc structure of crescent hole can convert the linear motion of shaft sleeve 24 into the rotating action of clamping arm 22. In addition, the middle part of clamping arm 22 is provided with a shaft hole, and clamping arm 22 is fixed on the rotating shaft through the shaft hole, so that clamping arm 22 can rotate around the shaft hole, thereby completing the clamping and releasing action.

[0020] In actual use, when piston rod 26 moves upwards under the action of gas pressure, shaft sleeve 24 slides in the crescent hole, drives clamping arm 22 to open outwards respectively, the clamping angle between the two clamping arms 22 reaches the maximum, can adapt to larger size workpiece or adapt to special-shaped sheet metal parts, significantly improves the applicability and flexibility of the equipment;When piston rod 26 moves downwards, shaft sleeve 24 drives clamping arm 22 to tighten inwards respectively, realizes the stable clamping of workpiece through clamping screw 21, ensures the position accuracy and uniform stress of workpiece in the welding or detection process. The two symmetrical designed clamping arms 22 can effectively disperse the pressure during clamping, avoid the uneven stress and workpiece deformation problem caused by traditional single-side clamping, thereby improving the clamping stability and reliability of welding quality.

[0021] Through the structural design, the sheet metal double-arm clamping air cylinder can not only meet the basic functional requirements of the traditional clamping air cylinder, but also significantly expand the clamping range and the type of workpieces suitable, and improve the fixing reliability of the workpiece and the efficiency of the clamping operation. The design is simple and efficient, the structure is stable, and is suitable for application in various industrial scenes, and provides more reliable technical support for improving the sheet metal body resistance welding and quality detection process.

[0022] The connecting plate 10 is fixedly connected to the cylinder body 20, and is used for fixing the cylinder body to the adherend, i.e., fixing the air cylinder.

[0023] Double-arm clamping air cylinder action specific working principle

[0024] Air cylinder clamping: the first air port 28 is supplied with air, the piston 27 drives the piston rod 26 and the shaft sleeve 24 on the piston rod 26 to move downward, the shaft sleeve 24 slides in the crescent groove in the clamping arm, drives the first clamping arm to rotate clockwise around the rotating shaft 23, and the second clamping arm rotates counterclockwise around the rotating shaft 23, when the shaft sleeve 24 is forced to act on the steel sheet 25, the steel sheet 25 bears the wear resistance force and impact force when the shaft sleeve moves, so that the double clamping arms simultaneously exert force on the workpiece through the clamping screw 21.

[0025] Air cylinder opening: the second air port 29 is supplied with air, the piston 27 moves upward to make the first clamping arm rotate counterclockwise to open, and the second clamping arm rotates clockwise to open.

[0026] Air cylinder clamping mechanical self-locking principle:

[0027] After the air cylinder reaches the clamping state, the reaction force of the clamping force drives the first clamping arm to rotate counterclockwise, and the second clamping arm to rotate clockwise, at this time, the force received by the shaft sleeve 24 is perpendicular to the movement direction of the piston 27, and the piston 27 cannot be driven to move upward, so that the self-locking of the clamping state is realized.

[0028] The sheet metal double-arm clamping air cylinder has the following advantages:

[0029] The metal plate double-arm clamping air cylinder realizes flexible rotation of the clamping arm through the symmetrical double-clamping-arm structure and the crescent hole sliding connection mode, can adapt to workpieces of different sizes and shapes in the opening and clamping process of the air cylinder, and significantly improves the applicability of the equipment; the piston rod drives the shaft sleeve to move up and down, so that the clamping arm reaches the maximum opening angle, solves the problem that the opening angle of the air cylinder is too small to limit the stretching of the transmission mechanism in the prior art, and meanwhile, the clamping arm realizes stable and uniform centering and clamping of the workpiece through the clamping screw in the clamping state, avoids the problems of uneven stress and workpiece deformation caused by one-side clamping, and improves the welding quality and clamping stability; in the clamping state, the air cylinder prevents the clamping arm from loosening due to the reaction force through the mechanical self-locking principle, further improves the safety and reliability of operation; the air cylinder structure is simple and efficient, convenient to operate, can adapt to various industrial scene requirements, provides stable and reliable technical support for metal plate body resistance welding and quality detection, and improves the consistency of production efficiency and process quality.

[0030] The above only describes preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A sheet metal double-arm clamping cylinder, comprising a cylinder body (20) and a transmission mechanism arranged above the cylinder body (20), a piston (27) is arranged in the cylinder body (20), a piston rod (26) is arranged in the cylinder body (20), the bottom of the piston rod (26) is fixedly connected with the piston (27), the upper part and the lower part of the cylinder body (20) are respectively provided with a first gas port (28) and a second gas port (29), characterized in that, The top of the piston rod (26) is connected with a transverse shaft sleeve (24), a set of symmetrical clamping arms (22) are arranged, the top of the clamping arms (22) is provided with clamping screws (21), the bottom of the clamping arms (22) is formed with crescent holes in sliding connection with the shaft sleeve (24), and the middle part of the clamping arms (22) is provided with a shaft hole, and the clamping arms (22) can rotate around the rotating shaft (23) arranged in the shaft hole.

2. The double-armed sheet metal clamping cylinder according to claim 1, characterized in that The connecting plate (10) is fixedly connected with the cylinder body (20).

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