Rear cover fixing structure of thin cylinder

Abstract

The utility model belongs to the technical field of cylinders, and particularly relates to a rear cover fixing structure of a thin cylinder, which comprises a cylinder body, a first air port and a second air port, the first air port and the second air port are arranged on the cylinder body, a front end cover is fixedly assembled at one end of the cylinder body, a piston is movably assembled in the cylinder body, and a piston rod is fixedly assembled on one side of the piston. The piston rod penetrates through the front end cover to the outside of the cylinder body, an assembling groove is formed in the inner wall of one end of the cylinder body, a rear end cover is assembled in the assembling groove and fixed to the cylinder body through a spin riveting structure, the spin riveting structure comprises a spin riveting part fixedly arranged at one end of the cylinder body, and a plurality of grooves are formed in the side, close to the outside of the cylinder body, of the rear end cover. Through the cooperation of the groove and the spin riveting part, the spin riveting part is uniformly distributed in the groove after deformation, so that the riveting stability and reliability are improved, the fixing structure between the rear end cover and the cylinder body is more reliable, the sealing effect in the cylinder body is guaranteed, and the problems of air leakage, oil leakage and the like are prevented from influencing the normal operation of the cylinder.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinders, in particular to a rear cover fixing structure of a thin cylinder. Background Art

[0002] The cylinder is a pneumatic actuator that converts compressed air energy into linear mechanical energy. Its advantages include simple structure, reliability, fast response and low cost. It is widely used in industrial automation, automobiles, robotics and other fields, such as production line promotion, automobile parts control, robotic arm movement, etc.

[0003] The existing cylinder is a key component in the mechanical device, which is mainly composed of a cylinder barrel, an end cover, a piston and a piston rod. Its working principle is based on Pascal's law. It converts energy through the compression and expansion of gas in a sealed space to push the piston to perform linear or swinging motion.

[0004] At present, the cylinder in the prior art has the following disadvantages: the existing rear end cover of the cylinder is fixed to the cylinder barrel by fixing bolts or flanges. Although the bolts and flanges can provide strong fastening force, over time, due to factors such as vibration and temperature changes, the bolts may loosen, resulting in a decrease in sealing performance. In addition, if the tightening torque of the bolts is uneven, it may also cause an uneven sealing surface, thereby affecting the sealing effect, causing problems such as air leakage and oil leakage, and affecting the normal operation of the cylinder; therefore, a rear cover fixing structure of a thin cylinder is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing cylinder, the existing rear end cover of the cylinder is fixed to the cylinder barrel by fixing bolts or flanges or other fixing parts. Although the bolts and flanges can provide strong fastening force, over time, due to factors such as vibration and temperature changes, the bolts may loosen, resulting in a decrease in sealing performance. In addition, if the tightening torque of the bolts is uneven, it may also cause an uneven sealing surface, thereby affecting the sealing effect, causing air leakage, oil leakage and other problems, affecting the normal operation of the cylinder. A rear cover fixing structure of a thin cylinder is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problem is: the utility model describes a rear cover fixing structure of a thin cylinder, comprising a cylinder body, and a first air port and a second air port opened on the cylinder body, one end of the cylinder body is fixedly equipped with a front end cover, a piston is movably installed in the cylinder body, one side of the piston is fixedly equipped with a piston rod, the piston rod passes through the front end cover to the outside of the cylinder body, an assembly groove is opened on the inner wall of one end of the cylinder body, a rear end cover is installed in the assembly groove, and the rear end cover is fixed to the cylinder body by a rivet structure.

[0007] Preferably, the rotary riveting structure comprises a rotary riveting portion fixedly arranged at one end of the cylinder body, and a plurality of grooves are formed on a side of the rear end cover close to the outside of the cylinder body.

[0008] Preferably, a mounting groove is provided on the circumferential surface of the rear end cover, and a sealing ring is installed in the mounting groove.

[0009] Preferably, the front end cover and the rear end cover are both equipped with buffer pads on the surfaces opposite to the piston.

[0010] Beneficial effects of the utility model:

[0011] The utility model provides a rear cover fixing structure of a thin cylinder, wherein the rear end cover and the cylinder body are fixed by a rivet structure, and the cooperation between the groove and the rivet part makes the rivet part evenly distributed in the groove after deformation, thereby improving the stability and reliability of the riveting, making the fixing structure between the rear end cover and the cylinder body more reliable, ensuring the sealing effect in the cylinder body, preventing problems such as air leakage and oil leakage from affecting the normal operation of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0013] Figure 1 It is a sectional plan view of the overall structure;

[0014] Figure 2 It is a cross-sectional exploded view of the cylinder block and rear end cover;

[0015] Figure 3 yes Figure 1 A magnified view of the structure at center A;

[0016] Legend:

[0017] 1. Cylinder body; 2. First air port; 3. Second air port; 4. Front cover; 5. Piston; 6. Piston rod; 7. Assembly groove; 8. Rear cover; 9. Groove; 10. Riveting part; 11. Mounting groove; 12. Sealing ring; 13. Buffer pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Specific examples are given below.

[0020] See also Figure 1-Figure 3 The utility model discloses a rear cover fixing structure of a thin cylinder, comprising a cylinder body 1, and a first air port 2 and a second air port 3 provided on the cylinder body 1, a front end cover 4 being fixedly mounted on one end of the cylinder body 1, a piston 5 being movably mounted in the cylinder body 1, a piston rod 6 being fixedly mounted on one side of the piston 5, the piston rod 6 passing through the front end cover 4 to the outside of the cylinder body 1, a mounting groove 7 being provided on the inner wall at one end of the cylinder body 1, a rear end cover 8 being mounted in the mounting groove 7, the rear end cover 8 being fixed to the cylinder body 1 through a riveting structure, the riveting structure comprising a riveting part 10 fixedly arranged at one end of the cylinder body 1, a plurality of grooves 9 being provided on a side of the rear end cover 8 close to the outside of the cylinder body 1, during operation, when the staff assembles the rear end cover 8 on the cylinder body 1, the rear end cover 8 is placed in the mounting groove 7, and then the external riveting machine is started, and the riveting machine is used to rivet the rear end cover 8 on the cylinder body 1. The rotary riveting part 10 is rotated and extruded, so that the rotary riveting part 10 is deformed by force, and the rotary riveting part 10 extends toward the rear end cover 8, and the rotary riveting part 10 is squeezed into the groove 9. The shape of the groove 9 is funnel-shaped, and the entrance of the groove 9 is provided with an arc-shaped groove to make it easier for the rotary riveting part 10 to enter the groove 9 when deformed. Since the funnel-shaped groove 9 provides a guide and accommodating space for the deformation of the rotary riveting part 10, as the rotary riveting part 10 gradually deforms, it is squeezed into the funnel-shaped groove 9. The shape of the funnel-shaped groove 9 helps to guide the deformation direction of the rotary riveting part 10 and enables it to be more evenly distributed in the groove 9, thereby improving the stability and reliability of the riveting, making the fixing structure between the rear end cover 8 and the cylinder body 1 more reliable, ensuring the sealing effect in the cylinder body 1, and preventing problems such as air leakage and oil leakage, which affect the normal operation of the cylinder.

[0021] Furthermore, a mounting groove 11 is provided on the circumferential surface of the rear end cover 8, and a sealing ring 12 is installed in the mounting groove 11. When working, the sealing ring 12 provided on the rear end cover 8 further improves the sealing performance of the entire cylinder.

[0022] Furthermore, the front cover 4 and the rear cover 8 are both equipped with buffer pads 13 on the opposite surfaces of the piston 5. During operation, the buffer pads 13 cooperate to provide buffering for the piston 5 when the piston 5 slides in the cylinder body 1.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A rear cover fixing structure of a thin cylinder, comprising a cylinder body (1), and a first air port (2) and a second air port (3) opened on the cylinder body (1), characterized in that: A front end cover (4) is fixedly mounted on one end of the cylinder body (1), a piston (5) is movably mounted inside the cylinder body (1), a piston rod (6) is fixedly mounted on one side of the piston (5), the piston rod (6) passes through the front end cover (4) to the outside of the cylinder body (1), an assembly groove (7) is formed on the inner wall of one end of the cylinder body (1), a rear end cover (8) is mounted in the assembly groove (7), and the rear end cover (8) is fixed to the cylinder body (1) by a riveting structure.

2. The rear cover fixing structure of a thin cylinder according to claim 1, characterized in that: The rotary riveting structure comprises a rotary riveting portion (10) fixedly arranged at one end of the cylinder body (1), and a plurality of grooves (9) are provided on one side of the rear end cover (8) close to the outside of the cylinder body (1).

3. The rear cover fixing structure of a thin cylinder according to claim 1, characterized in that: A mounting groove (11) is provided on the circumferential surface of the rear end cover (8), and a sealing ring (12) is installed in the mounting groove (11).

4. The rear cover fixing structure of a thin cylinder according to claim 1, characterized in that: The front end cover (4) and the rear end cover (8) are both equipped with buffer pads (13) on the surfaces opposite to the piston (5).

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