Piston cylinder with buffering function

Abstract

The utility model discloses a piston cylinder with a buffering function, which belongs to the technical field of piston mechanisms and comprises a cylinder sleeve, an exhaust valve plate and a valve plate, the exhaust valve plate and the valve plate are arranged in the cylinder sleeve, and the exhaust valve plate and the valve plate are oppositely arranged. A flexible gasket is arranged on the face, facing the exhaust valve plate, of the valve plate piece. The piston cylinder with the buffering function solves the problem that the service life of the exhaust valve plate can be affected due to the fact that the existing exhaust valve plate and the valve plate are directly arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of piston mechanisms, and particularly relates to a piston cylinder with a buffering function. Background Technique

[0002] At present, piston-type air compressors and vacuum pumps on the market mainly adopt piston cylinder structures. For example, in the "Novel Double-Connecting-Rod High-Efficiency Linear Motion Piston Structure, Compressor and Vacuum Pump" disclosed in the Chinese invention patent with the application number 202310942044.5, a valve plate assembly is provided to timely discharge the gas between the cylinder liner, the valve plate assembly and the piston assembly. The valve plate assembly includes a valve plate part and an exhaust valve disc. The exhaust valve disc moves relative to the valve plate part by using the air pressure difference, so that the air outlet hole on the valve plate part communicates with the outside, and the gas between the cylinder liner, the valve plate assembly and the piston assembly is discharged to the outside through the air outlet hole.

[0003] The existing exhaust valve disc is a rigid part. Since the exhaust valve disc directly collides with the valve plate part during the process of using the air pressure difference to move the exhaust valve disc relative to the valve plate part, after repeated collisions, the exhaust valve disc made of rigid material is prone to metal fatigue, affecting the service life of the exhaust valve disc and resulting in the situation that the air outlet hole is not tightly closed. Content of the Utility Model

[0004] In order to overcome the defects existing in the prior art, the utility model provides a piston cylinder with a buffering function to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a piston cylinder with a buffering function, including a cylinder liner, an exhaust valve disc and a valve plate part arranged in the cylinder liner, and the exhaust valve disc and the valve plate part are arranged opposite to each other;

[0006] A flexible gasket is arranged on the surface of the valve plate part facing the exhaust valve disc.

[0007] Preferably, the valve plate part is provided with an installation deep groove, and the flexible gasket is arranged in the installation deep groove.

[0008] Optionally, the valve plate part is further provided with an installation shallow groove, and the installation shallow groove communicates with the installation deep groove;

[0009] A flexible pressing piece is arranged on the side of the flexible gasket close to the exhaust valve disc. The flexible pressing piece includes a pressing piece body and a connecting ear. The pressing piece body presses on the flexible gasket, and the connecting ear is arranged in the installation shallow groove.

[0010] It should be noted that a positioning post is arranged in the installation shallow groove, and the connecting ear is sleeved on the positioning post.

[0011] Specifically, a sealing ring is sleeved on the valve plate member, and the valve plate member is connected to the inner wall of the cylinder sleeve through the sealing ring.

[0012] Preferably, a plurality of flexible gaskets are evenly distributed on the surface of the valve plate member facing the exhaust valve sheet.

[0013] The beneficial effect of the present utility model lies in that in the piston cylinder with a buffering effect, by arranging the flexible gasket, when the exhaust valve sheet moves in the direction close to the valve plate member, it will not directly collide with the valve plate member, but first contact the flexible gasket, and the flexible gasket provides a buffering force, and finally contact the valve plate member. In this way, the metal fatigue caused by direct collision of the exhaust valve sheet made of rigid material can be alleviated, thereby improving the service life of the exhaust valve sheet. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a valve plate member and a cylinder sleeve in an embodiment of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of a valve plate member and a cylinder sleeve in another embodiment of the present utility model;

[0016] Figure 3 It is an exploded view of a valve plate member in an embodiment of the present utility model;

[0017] Figure 4 is Figure 3 an enlarged schematic view of the virtual circle A of;

[0018] Figure 5 It is an exploded view of an exhaust valve sheet, a valve plate member and a cylinder sleeve in an embodiment of the present utility model;

[0019] In the figure: 1 exhaust valve sheet; 2 valve plate member; 21 installation deep groove; 22 installation shallow groove; 23 positioning column; 24 air outlet hole; 3 cylinder sleeve; 4 flexible gasket; 5 flexible pressing sheet; 51 pressing sheet body; 52 connecting ear; 6 sealing ring. Detailed Embodiments

[0020] The following further describes the specific embodiments of the present utility model in conjunction with the drawings. It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] Such as Figures 1-5As shown, a piston cylinder with a buffering function includes a cylinder sleeve 3, an exhaust valve plate 1 and a valve plate member 2 arranged inside the cylinder sleeve 3. The exhaust valve plate 1 and the valve plate member 2 are arranged opposite to each other. In this embodiment, the valve plate member 2 is provided with an air outlet hole 24, and the exhaust valve plate 1 slides relative to the valve plate member 2 inside the cylinder sleeve 3 to cover or open the air outlet hole 24.

[0022] The surface of the valve plate member 2 facing the exhaust valve plate 1 is provided with a flexible gasket 4. In this embodiment, the flexible gasket 4 is a rubber gasket.

[0023] In the piston cylinder with a buffering function, by arranging the flexible gasket 4, when the exhaust valve plate 1 moves in the direction close to the valve plate member 2, it will not directly collide with the valve plate member 2, but first contact the flexible gasket 4. The flexible gasket 4 provides a buffering force, and finally contacts the valve plate member 2. In this way, the metal fatigue caused by direct collision of the exhaust valve plate 1 made of rigid material can be alleviated, thereby improving the service life of the exhaust valve plate 1.

[0024] Preferably, the valve plate member 2 is provided with an installation deep groove 21, and the flexible gasket 4 is arranged in the installation deep groove 21. Arranging the flexible gasket 4 in the installation deep groove 21 can prevent the flexible gasket 4 from shifting.

[0025] Specifically, as Figure 3 and 4 shown, the valve plate member 2 is further provided with an installation shallow groove 22, and the installation shallow groove 22 communicates with the installation deep groove 21.

[0026] One side of the flexible gasket 4 close to the exhaust valve plate 1 is provided with a flexible pressing piece 5. The flexible pressing piece 5 includes a pressing piece body 51 and a connecting ear 52. The pressing piece body 51 presses on the flexible gasket 4, and the connecting ear 52 is arranged in the installation shallow groove 22.

[0027] The flexible pressing piece 5 is a rubber pressing piece. By arranging the connecting ear 52 on the pressing piece body 51 and matching the connecting ear 52 with the installation shallow groove 22, the flexible pressing piece 5 can be fixed, and the flexible pressing piece 5 presses the flexible gasket 4 to prevent the flexible gasket 4 from falling off. In this embodiment, the depth of the installation deep groove 21 is greater than the depth of the installation shallow groove 22.

[0028] It should be noted that a positioning post 23 is provided in the installation shallow groove 22, and the connecting ear 52 is sleeved on the positioning post 23. An opening is provided in the connecting ear 52, and the connecting ear 52 is fixed by being sleeved on the positioning post 23 through the opening. In this embodiment, installation shallow grooves 22 are provided on both symmetric sides of the installation deep groove 21, and a positioning post 23 is provided in each installation shallow groove 22. Correspondingly, connecting ears 52 are provided on both symmetric sides of the pressing piece body 51, and the connecting ears 52 correspond to the positioning posts 23 one by one.

[0029] Optionally, a sealing ring 6 is sleeved on the valve plate member 2, and the valve plate member 2 is connected to the inner wall of the cylinder liner 3 through the sealing ring 6. By providing the sealing ring 6, the valve plate member 2 can be in close contact with the inner wall of the cylinder liner 3, ensuring that the cylinder liner 3 is not easily air-leaked.

[0030] Preferably, as Figure 2 shown, a plurality of flexible gaskets 4 are evenly distributed on the surface of the valve plate member 2 facing the exhaust valve piece 1. Such cooperation of the plurality of flexible gaskets 4 can improve the buffering effect.

[0031] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A piston cylinder with a buffering function, characterized in that: It includes a cylinder liner and an exhaust valve plate and a valve plate member disposed within the cylinder liner, and the exhaust valve plate and the valve plate member are disposed opposite to each other; A flexible gasket is provided on the surface of the valve plate member facing the exhaust valve plate.

2. The piston cylinder with a buffering function according to claim 1, characterized in that: The valve plate member is provided with an installation deep groove, and the flexible gasket is disposed within the installation deep groove.

3. The piston cylinder with a buffering function according to claim 2, wherein: The valve plate member is further provided with an installation shallow groove, and the installation shallow groove communicates with the installation deep groove; A flexible pressing piece is provided on one side of the flexible gasket close to the exhaust valve plate. The flexible pressing piece includes a pressing piece body and a connecting ear. The pressing piece body presses on the flexible gasket, and the connecting ear is disposed within the installation shallow groove.

4. A piston cylinder with a buffering function according to claim 3, characterized in that: A positioning post is provided within the installation shallow groove, and the connecting ear is sleeved on the positioning post.

5. A piston cylinder with a buffering function according to claim 1, characterized in that: A sealing ring is sleeved on the valve plate member, and the valve plate member is connected to the inner wall of the cylinder liner through the sealing ring.

6. A piston cylinder with a buffering function according to claim 1, characterized in that: A plurality of flexible gaskets are evenly distributed on the surface of the valve plate member facing the exhaust valve plate.

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