Air cylinder with dust cover

Abstract

The air cylinder comprises a cylinder body, a piston movably installed in the cylinder body and a cylinder cover arranged on the outer side of the cylinder body, a piston rod is installed on the piston, one end of the piston rod sequentially penetrates through the cylinder body and the cylinder cover to extend to the outer side of the cylinder body, and one end of the piston rod is fixedly connected with an end plate. An organ protective cover is installed between the end plate and the cylinder cover, fixing frames are arranged at the two ends of the organ protective cover, sealing pieces are installed on one sides of the two fixing frames, and sealing grooves matched with the sealing pieces are formed in one side of the end plate and one side of the cylinder cover. The piston rod and the guide rod can be well protected through the organ protective cover and prevented from making contact with dust, the framework plays a supporting and stabilizing role, the organ protective cover cannot collapse when the piston rod is used in the horizontal direction, the length of the piston rod is not limited, and after long-time use, the piston rod and the guide rod cannot be damaged. And the organ protective cover cannot be hardened and cracked and is long in service life.

Description

Technical Field

[0001] This utility model relates to the field of cylinder technology, specifically to a cylinder with a dust cover. Background Technology

[0002] A cylinder is a linear motion actuator that uses compressed air as a power source to convert gas pressure energy into mechanical energy. It is widely used in automation equipment, machinery manufacturing, industrial control and other fields. It is mainly composed of cylinder body, piston, piston rod and end cap.

[0003] To prevent dust and other impurities from adhering to the piston rod, some existing cylinders are usually equipped with dust covers to shield the piston rod. However, dust covers are usually made of rubber, which has poor support. Especially when the cylinder is used horizontally, the dust cover is prone to collapse, which can affect the normal movement of the piston rod. Therefore, there is a certain limitation on the length of the piston rod. The length of the piston rod cannot be too long. In addition, rubber has poor heat resistance and cold resistance. After long-term use, it is prone to hardening and cracking, resulting in a short service life. Utility Model Content

[0004] The purpose of this invention is to provide a cylinder with a dust cover to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cylinder with a dust cover, comprising a cylinder body, a piston movably installed inside the cylinder body, and a cylinder cover disposed on the outside of the cylinder body. A piston rod is mounted on the piston, one end of which passes through the cylinder body and the cylinder cover sequentially and extends to the outside of the cylinder body. An end plate is fixedly connected to one end of the piston rod. An accordion cover is installed between the end plate and the cylinder cover. Multiple frames are installed on the inner side wall of the accordion cover. Fixed frames are provided at both ends of the accordion cover. A sealing element is installed on one side of each of the two fixed frames. A sealing groove that mates with the sealing element is opened on one side of the end plate and the cylinder cover. A wave spring is installed inside the sealing groove. Bolts for fixing the fixed frames are provided on the fixed frames. Threaded holes that mate with the bolts are provided on both the cylinder cover and the end plate.

[0006] As a preferred embodiment of this utility model, the inner wall of the sealing groove is provided with a second limiting groove, the sealing element is provided with a first limiting groove, and the wave spring is located between the first limiting groove and the second limiting groove.

[0007] As a preferred embodiment of this utility model, a guide rod is symmetrically slidably installed inside the cylinder body, and one end of the guide rod passes through the cylinder cover and connects to the end plate.

[0008] In a preferred embodiment of this invention, the sealing element is a rubber gasket.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: The accordion-style protective cover of this utility model can provide good protection for the piston rod and guide rod, preventing them from contacting dust. The frame provides support and stability, so that the accordion-style protective cover will not collapse when used horizontally. Therefore, there is no limitation on the length of the piston rod. Moreover, the accordion-style protective cover will not harden or crack after long-term use, and has a long service life. At the same time, the sealing groove, sealing element and wave spring can play a sealing role, thereby preventing dust from entering the accordion-style protective cover through the gap between the end plate and the fixed frame or between the cylinder head and the fixed frame. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0012] Figure 3 This is a cross-sectional view of the present invention;

[0013] Figure 4 This utility model Figure 3 Enlarged view of point B in the middle;

[0014] Figure 5 This is a structural schematic diagram of the bellows cover of this utility model;

[0015] Figure 6 This utility model Figure 5 Enlarged view of point C in the middle;

[0016] Figure 7 This is a schematic diagram of the cylinder head structure of this utility model.

[0017] In the diagram: 1. Cylinder block; 2. Cylinder head; 3. End plate; 4. Guide rod; 5. Piston rod; 6. Bellows guard; 7. Fixing frame; 8. Bolt; 9. Piston; 10. Sealing groove; 11. Seal; 12. First limiting groove; 13. Second limiting groove; 14. Wave spring; 15. Threaded hole; 16. Frame. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 7 This utility model provides a technical solution: a cylinder with a dust cover, including a cylinder body 1, a piston 9 movably installed inside the cylinder body 1, and a cylinder cover 2 located on the outside of the cylinder body 1. A piston rod 5 is installed on the piston 9, and one end of the piston rod 5 passes through the cylinder body 1 and the cylinder cover 2 to extend to the outside of the cylinder body 1. An end plate 3 is fixedly connected to one end of the piston rod 5. An accordion cover 6 is installed between the end plate 3 and the cylinder cover 2. Multiple frames 16 are installed on the inner side wall of the accordion cover 6. The accordion cover 6 is made of waterproof canvas, which has multiple protective functions such as waterproof, oil-proof, and dustproof. It can play a good protective role for the piston rod 5 and the guide rod 4, preventing them from contacting dust. Moreover, the waterproof canvas will not harden and crack after long-term use, and has a long service life. The frames 16 are made of PVC material and play a supporting and stable role, so that the accordion cover 6 will not collapse when used horizontally. Therefore, there is no limitation on the length of the piston rod 5. Fixed frames 7 are provided at both ends of the accordion cover 6, and one side of each fixed frame 7 is equipped with... A sealing element 11 is provided to seal the space between the end plate 3 and the fixed frame 7, and between the cylinder head 2 and the fixed frame 7, thereby preventing dust from entering the bellows cover 6 through the gaps between the end plate 3 and the fixed frame 7 or between the cylinder head 2 and the fixed frame 7. A sealing groove 10 is provided on one side of both the end plate 3 and the cylinder head 2 to mate with the sealing element 11. The sealing groove 10 increases the contact area with the sealing element 11, thereby improving the sealing effect of the sealing element 11. A wave spring 14 is installed inside the sealing groove 10. The wave spring 14 is used to apply pressure to the seal 11, so that the seal 11 will be squeezed and deformed, which can better fit the inner wall of the sealing groove 10, thereby improving the sealing effect of the seal 11. The fixed frame 7 is provided with bolts 8 for fixing the fixed frame 7. The cylinder head 2 and the end plate 3 are both provided with threaded holes 15 that cooperate with the bolts 8. The bolts 8 are screwed into the threaded holes 15 to fix the fixed frame 7. When the fixed frame 7 is fixed, it will also press the seal 11 to ensure the sealing effect of the seal 11.

[0020] The inner wall of the sealing groove 10 is provided with a second limiting groove 13, and the sealing member 11 is provided with a first limiting groove 12. The first limiting groove 12 and the second limiting groove 13 are used to limit the wave spring 14 and prevent the wave spring 14 from shifting during the extension and contraction process. The wave spring 14 is located between the first limiting groove 12 and the second limiting groove 13.

[0021] Inside the cylinder body 1, guide rods 4 are symmetrically slidably installed. The guide rods 4 are used to guide the piston rod 5, ensuring that it moves along a predetermined trajectory during the movement and avoiding deviation or shaking. One end of the guide rod 4 passes through the cylinder head 2 and is connected to the end plate 3.

[0022] Among them, the sealing element 11 is a rubber gasket. The rubber gasket has good elasticity and can fill the gap, so it can achieve a good sealing effect and maintain stable sealing performance during long-term use.

[0023] Specifically, during use, the bellows cover 6 will extend or retract with the movement of the end plate 3. Due to the protective function of the bellows cover 6, dust and other impurities in the external environment cannot come into contact with the piston rod 5 and guide rod 4, thus avoiding damage to them and extending their service life. Furthermore, due to the sealing function of the seal 11, external dust and other impurities are prevented from entering the bellows cover 6 through gaps, improving the reliability of the bellows cover 6.

[0024] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cylinder with a dust cover, comprising a cylinder body (1), a piston (9) movably installed inside the cylinder body (1), and a cylinder cover (2) disposed outside the cylinder body (1), wherein a piston rod (5) is mounted on the piston (9), one end of the piston rod (5) extends through the cylinder body (1) and the cylinder cover (2) to the outside of the cylinder body (1), and one end of the piston rod (5) is fixedly connected to an end plate (3), characterized in that: A bellows cover (6) is installed between the end plate (3) and the cylinder head (2). Multiple frames (16) are installed on the inner side wall of the bellows cover (6). Fixed frames (7) are provided at both ends of the bellows cover (6). A sealing element (11) is installed on one side of each of the two fixed frames (7). A sealing groove (10) that cooperates with the sealing element (11) is opened on one side of the end plate (3) and the cylinder head (2). A wave spring (14) is installed inside the sealing groove (10). Bolts (8) for fixing the fixed frame (7) are provided on the fixed frame (7). Threaded holes (15) that cooperate with the bolts (8) are provided on both the cylinder head (2) and the end plate (3).

2. A cylinder with a dust cover according to claim 1, characterized in that: The inner wall of the sealing groove (10) is provided with a second limiting groove (13), the sealing element (11) is provided with a first limiting groove (12), and the wave spring (14) is located between the first limiting groove (12) and the second limiting groove (13).

3. A cylinder with a dust cover according to claim 1, characterized in that: The cylinder body (1) is symmetrically and slidably installed with guide rods (4), one end of which passes through the cylinder head (2) and is connected to the end plate (3).

4. A cylinder with a dust cover according to claim 1, characterized in that: The sealing element (11) is a rubber gasket.

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