A sector rotary cylinder with a piston seal of the metal-coated rubber type

Abstract

The present invention discloses a sector-shaped rotary cylinder with a metal-coated rubber piston seal, belonging to the technical field of rotary cylinders, including a cylinder block, the cylinder block includes a front cover and a rear cover, a left air hole is provided on the left side wall of the front cover, a right air hole is provided on the right side wall of the rear cover, an air cavity is arranged inside the cylinder block, and a piston is installed in the air cavity. When in use of the present invention, when the air source enters the air cavity to push the piston to move, the gas in the air source will enter the air guide groove, and the gas entering the air guide groove will push the lip edge, so that the lip edge fits more closely with the side walls of the front cover and the rear cover, thereby avoiding air source leakage. When the piston swings in the air cavity, the lubricating oil is always located in the oil guide groove, and as the piston swings, the lubricating oil will be smeared on the inner wall of the cylinder block. In this way, the inner wall of the cylinder block can be continuously lubricated by the lubricating oil, reducing the friction force, and thus increasing the smoothness of the piston when swinging in the air cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary cylinders, and specifically to a sector-shaped rotary cylinder with a piston seal of a metal-coated rubber type. Background Art

[0002] The current structure of the sector-shaped rotary cylinder is a single-sided "O"-ring seal, and the rotating shaft is also sealed with an "O"-ring. However, the "O"-ring is not suitable for dynamic sealing. The rotary cylinder is constantly rotating, and its sealing principle is that the cylinder housing squeezes the "O"-ring on the rotating piston to achieve sealing. However, this method has the problem of large friction, and the "O"-ring on the rotating piston is easily worn, resulting in internal leakage of the cylinder. Both internal leakage and external leakage will affect the torque of the cylinder. Therefore, the present invention provides a sector-shaped rotary cylinder with a piston seal of a metal-coated rubber type to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a sector-shaped rotary cylinder with a piston seal of a metal-coated rubber type to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A sector-shaped rotary cylinder with a piston seal of a metal-coated rubber type, including a cylinder block. The cylinder block includes a front cover and a rear cover. A left air hole is provided on the left side wall of the front cover, and a right air hole is provided on the right side wall of the rear cover. An air chamber is provided inside the cylinder block, and a piston is installed in the air chamber. The piston is rotatably connected to the cylinder block through a rotating shaft. The piston includes a plug body, and a rubber sleeve is sleeved outside the plug body. Lip edges are provided at both the left and right ends of the rubber sleeve, and the lip edges are in contact with the inner wall of the cylinder block. Oil guide grooves are provided at both the front and rear ends of the rubber sleeve, and lubricating oil is filled in the oil guide grooves. Air guide grooves are also provided at both the left and right ends of the rubber sleeve.

[0006] As a further solution of the present invention, the front cover and the rear cover are connected together by a plurality of bolts, and sealing grooves are provided at the ends of the front cover and the rear cover that are close to each other, and a sealing gasket is plugged in the sealing grooves.

[0007] As a further solution of the present invention, the piston is fixedly connected to the rotating shaft.

[0008] As a further solution of the present invention, limiting windows are provided at both the left and right ends of the rubber sleeve, and limiting blocks are fixedly connected to both the left and right ends of the plug body, and the limiting blocks are located inside the limiting windows.

[0009] As a further solution of the present invention, the material of the lip edges is the same as that of the rubber sleeve and the lip edges are integrally formed with the rubber sleeve.

[0010] As a further solution of the present invention, the air guide groove is located at the connection between the lip and the rubber sleeve.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. When the present invention is in use, when the air source enters the air cavity and pushes the piston to move, the gas in the air source will enter the air guide groove. The gas entering the air guide groove will push the lip, so that the lip fits more tightly with the side walls of the front cover and the rear cover, thereby avoiding air source leakage. Through this method, the greater the air source pressure, the stronger the force on the lip and the stronger the airtightness between the piston and the cylinder block.

[0013] 2. The present invention has the characteristics of simple structure. The piston is an integral body and no sealing parts need to be installed inside the cylinder block.

[0014] 3. When the present invention is in use, when the piston swings in the air cavity, the lubricating oil is always located in the oil guide groove. As the piston swings, the lubricating oil will be smeared on the inner wall of the cylinder block. In this way, the inner wall of the cylinder block can be continuously lubricated by the lubricating oil, reducing the friction force, and thus increasing the smoothness of the piston swinging in the air cavity. Description of the Drawings

[0015] Figure 1 It is a schematic structural view of a sector-shaped rotary cylinder with a piston seal of metal-coated rubber type.

[0016] Figure 2 It is a top view of a sector-shaped rotary cylinder with a piston seal of metal-coated rubber type.

[0017] Figure 3 It is a schematic connection view of the rear cover and the piston in a sector-shaped rotary cylinder with a piston seal of metal-coated rubber type.

[0018] Figure 4 It is a plan view of the connection between the rear cover and the piston in a sector-shaped rotary cylinder with a piston seal of metal-coated rubber type.

[0019] Figure 5 It is an exploded view of the piston in a sector-shaped rotary cylinder with a piston seal of metal-coated rubber type.

[0020] Figure 6 It is a cross-sectional view of the piston in a sector-shaped rotary cylinder with a piston seal of metal-coated rubber type.

[0021] In the figure: 1. Front cover; 2. Rear cover; 3. Left air hole; 4. Right air hole; 5. Air cavity; 6. Rotating shaft; 7. Rubber sleeve; 8. Sealing groove; 700. Lip; 701. Oil guide groove; 702. Plug body; 703. Limit block; 704. Limit window; 705. Air guide groove. Detailed Embodiment

[0022] Please refer toFigures 1 to 6 In the embodiment of the present invention, a sector-shaped rotary cylinder with a metal-coated rubber piston seal includes a cylinder block, which includes a front cover 1 and a rear cover 2. The front cover 1 and the rear cover 2 are connected together by a plurality of bolts, and both ends of the front cover 1 and the rear cover 2 close to each other are provided with sealing grooves 8. Sealing gaskets are inserted into the sealing grooves 8. The cooperation between the sealing grooves 8 and the sealing gaskets can make the connection between the front cover 1 and the rear cover 2 closer. A left air hole 3 is provided on the left side wall of the front cover 1, and a right air hole 4 is provided on the right side wall of the rear cover 2. An air chamber 5 is arranged in the cylinder block, and a piston is installed in the air chamber 5. The piston is rotatably connected to the cylinder block through a rotating shaft 6, and the piston is fixedly connected to the rotating shaft 6. The piston includes a plug body 702, which is made of a metal material (the metal material can be aluminum alloy). A rubber sleeve 7 is sleeved outside the plug body 702. The rubber sleeve 7 wraps around the plug body 702. Limiting windows 704 are provided at both the left and right ends of the rubber sleeve 7. Limiting blocks 703 are fixedly connected to both the left and right ends of the plug body 702. The limiting blocks 703 are integrally formed with the plug body 702. The limiting blocks 703 are located in the limiting windows 704. The cooperation between the limiting blocks 703 and the limiting windows 704 can make the connection between the rubber sleeve 7 and the plug body 702 more stable and prevent the rubber sleeve 7 from detaching from the plug body 702;

[0023] Both the left and right ends of the rubber sleeve 7 are provided with lips 700. The material of the lips 700 is the same as that of the rubber sleeve 7 and the lips 700 are integrally formed with the rubber sleeve 7. The lips 700 are in contact with the inner wall of the cylinder block. Oil guide grooves 701 are provided at both the front and rear ends of the rubber sleeve 7. Lubricating oil is filled in the oil guide grooves 701. Air guide grooves 705 are also provided at both the left and right ends of the rubber sleeve 7. The air guide grooves 705 are located at the connection between the lips 700 and the rubber sleeve 7.

[0024] The working principle of the present invention is:

[0025] Taking Figure 4 as an example, when the air source enters the air chamber 5 from the left air hole 3 during the use of the present invention, it will push the piston to swing to the right. The piston swinging to the right will drive the rotating shaft 6 to rotate counterclockwise. During the process of the piston swinging to the right, it will push the air in the air chamber 5 out from the right air hole 4 (the air in the air chamber 5 refers to the gas in the air chamber 5 on the right side of the piston). Similarly, when the air source enters the air chamber 5 from the right air hole 4, the piston will swing to the left. When the piston swings to the left, it will drive the rotating shaft 6 to rotate clockwise. At the same time, the piston will push the air in the air chamber 5 out from the left air hole 3;

[0026] When the air source enters the air cavity 5 and pushes the piston to move, the gas in the air source will enter the air guide groove 705. The gas entering the air guide groove 705 will push the lip 700, so that the lip 700 fits more tightly with the side walls of the front cover 1 and the rear cover 2, thereby avoiding air source leakage (that is, avoiding the air source leaking from the side where the air inlet hole is located to the side where the air outlet hole is located. Taking the left air hole 3 as the air source hole as an example, it can prevent the air source on the left side of the piston from leaking into the air cavity 5 on the right side of the piston). Through this method, the greater the air source pressure, the stronger the force on the lip 700 and the stronger the airtightness between the piston and the cylinder block;

[0027] Moreover, when the piston swings in the air cavity 5, the lubricating oil is always located in the oil guide groove 701. As the piston swings, the lubricating oil will be smeared on the inner wall of the cylinder block. In this way, the inner wall of the cylinder block can be continuously lubricated by the lubricating oil, thereby increasing the smoothness of the piston swinging in the air cavity 5.

[0028] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A sector rotary cylinder with a piston seal of metal-coated rubber type, comprising a cylinder block, characterized in that, The cylinder block includes a front cover (1) and a rear cover (2). A left air hole (3) is provided on the left side wall of the front cover (1), and a right air hole (4) is provided on the right side wall of the rear cover (2). An air cavity (5) is provided inside the cylinder block. A piston is installed in the air cavity (5). The piston is fixedly connected to a rotating shaft (6), and the piston is rotationally connected to the cylinder block through the rotating shaft (6). The piston includes a plug body (702). A rubber sleeve (7) is sleeved outside the plug body (702). Lip edges (700) are provided at both the left and right ends of the rubber sleeve (7). The lip edges (700) are in contact with the inner wall of the cylinder block. Oil guide grooves (701) are provided at both the front and rear ends of the rubber sleeve (7). Lubricating oil is filled in the oil guide grooves (701). Air guide grooves (705) are also provided at both the left and right ends of the rubber sleeve (7); The front cover (1) and the rear cover (2) are connected together by a plurality of bolts. Sealing grooves (8) are provided at the ends of the front cover (1) and the rear cover (2) that are close to each other, and sealing gaskets are inserted into the sealing grooves (8); Limiting windows (704) are provided at both the left and right ends of the rubber sleeve (7). Limiting blocks (703) are fixedly connected to both the left and right ends of the plug body (702), and the limiting blocks (703) are located inside the limiting windows (704).

2. A sector rotary cylinder with a piston seal of metal-coated rubber type according to claim 1, characterized in that, The material of the lip edges (700) is the same as that of the rubber sleeve (7), and the lip edges (700) and the rubber sleeve (7) are integrally formed.

3. A sector rotary cylinder with a piston seal of the metal-coated rubber type according to claim 1, characterized in that, The air guide grooves (705) are located at the connection between the lip edges (700) and the rubber sleeve (7).

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