Multi-position air cylinder

Abstract

The utility model belongs to the technical field of air cylinders, and particularly relates to a multi-position air cylinder which comprises a cylinder body, a middle cover is fixedly assembled in the cylinder body and divides the interior of the cylinder body into a first cavity and a second cavity, a through hole is formed in the middle cover, and one-way valves are fixedly assembled in the positions, close to the first cavity and the second cavity, of the interior of the through hole. An oil storage cavity is formed in the side wall of the cylinder body and is in through connection with the through hole through a connecting pipe, a spring is fixedly arranged in the connecting pipe through a mounting ring, a third piston is arranged on the inner wall of the connecting pipe, the spring end is connected to one side of the third piston, and a limiting ring is fixedly arranged in the connecting pipe and used for limiting the position of the third piston. When lubricant is supplemented to the multi-position air cylinder, external power is not needed in the lubricating process through the cooperation of the structure, synchronous operation can be achieved only through the work of the multi-position air cylinder, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinders, in particular to a multi-position cylinder. Background Art

[0002] A cylinder is a component in a machine that converts the pressure energy of compressed air into mechanical energy. There are various types of cylinders, including single-acting, double-acting, diaphragm, impact cylinders, etc. They are widely used in printing, semiconductors, automatic control, and robotics. Their advantages lie in the use of air as the medium, simple structure, strong load-bearing capacity, and easy automatic control. Among them, multi-position cylinders are also a type of cylinder.

[0003] The existing multi-position cylinder is mainly composed of the following parts: cylinder barrel, end cover, piston, piston rod and sealing ring and other key parts. The working principle is to control the switch of the air inlet and exhaust holes, and use the pressure difference of compressed air to drive the piston to reciprocate in the cylinder barrel, so as to realize the positioning and operation of the cylinder in different positions.

[0004] The multi-position cylinder in the existing technology has the following disadvantages: the multi-position cylinder working at high frequency and high load has a very obvious dependence on lubricant to prevent excessive wear and heat accumulation, and the staff needs to replenish the lubricant frequently. The way to replenish the lubricant is generally to disassemble the cylinder body for replenishment, or to use external oiling equipment for replenishment. Such replenishment method is relatively cumbersome and affects the work efficiency of the staff. Therefore, a multi-position cylinder is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of existing multi-position cylinders and solve the problem that multi-position cylinders working at high frequency and high load have obvious dependence on lubricants to prevent excessive wear and heat accumulation, and workers are required to replenish lubricants frequently. The way to replenish lubricants is generally to disassemble the cylinder body for replenishment, or to use external oiling equipment for replenishment. This replenishment method is relatively cumbersome and affects the work efficiency of workers. A multi-position cylinder is proposed.

[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: a multi-position cylinder described in the utility model comprises a cylinder body, a middle cover is fixedly mounted in the cylinder body, the middle cover divides the inside of the cylinder body into a first chamber and a second chamber, the cylinder body is provided with a first air inlet and a second air inlet and a second air inlet at the front and rear ends of the first chamber, the cylinder body is provided with a third air inlet and a fourth air inlet and a fourth air inlet and a second air inlet at the front and rear ends of the second chamber, a first piston is mounted in the first chamber, a first piston rod is mounted on one side of the first piston, one end of the first piston rod extends to the outside of the cylinder body, a second piston is mounted in the second chamber, a second piston rod is mounted on one side of the second piston, a through hole is opened at the center of the middle cover, and the second piston rod slides through the through hole;

[0007] A through hole is provided on the middle cover, and a one-way valve is fixedly installed inside the through hole near the first chamber and the second chamber. The one-way valve limits the gas in the first chamber and the second chamber to flow only into the through hole. An oil storage chamber is provided on the side wall of the cylinder body, and the oil storage chamber and the through hole are connected by a connecting pipe. A spring is fixedly provided in the connecting pipe through a mounting ring, and a third piston is provided on the inner wall of the connecting pipe. The spring is terminated at one side of the third piston. A limiting ring is fixedly provided in the connecting pipe for limiting the position of the third piston. An array of oil delivery channels is provided between the oil storage chamber and the first chamber and the second chamber.

[0008] Preferably, the oil delivery channel includes an oil inlet and an oil outlet, the oil inlet is located at one side of the oil storage cavity, the aperture of the oil inlet is larger than that of the oil outlet, and the aperture of the oil outlet is one fifth of the oil inlet.

[0009] Preferably, a first mounting groove is formed on the inner wall of the cylinder body, and the middle cover is fixedly assembled in the first mounting groove by means of retaining springs arranged on both sides.

[0010] Preferably, at least two groups of second installation grooves are formed on the circumferential surface of the middle cover, and first sealing rings are installed in the second installation grooves.

[0011] Preferably, a third mounting groove is provided on the circumferential surface of the first piston and the second piston, and a double O-ring is installed in the third mounting groove.

[0012] Preferably, at least two fourth mounting grooves are formed on the inner wall of the through hole, and a second sealing ring is installed in the fourth mounting groove.

[0013] Preferably, a sealing cover is assembled at the oil storage chamber by threaded rotation.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides a multi-position cylinder. When the lubricant is supplemented to the multi-position cylinder, the lubricant is pushed into the oil inlet of the oil delivery channel and then into the first chamber and the second chamber from the oil outlet under the action of air pressure. The first piston and the second piston continuously move and contact with the lubricant entering, and the contact surfaces thereof are lubricated. Moreover, the lubrication process does not require the use of external power, and the multi-position cylinders can be operated synchronously as long as they work, thereby greatly improving the working efficiency.

[0016] The cooperation between the retaining ring and the middle cover makes it unnecessary to splice two cylinder shells of the multi-position cylinder, thereby ensuring the working accuracy and axiality of the multi-position cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1 It is a cross-sectional view of the overall structure;

[0019] Figure 2 yes Figure 1 A magnified view of the structure at center A;

[0020] Figure 3 yes Figure 1 A magnified view of the structure at B in the middle;

[0021] Figure 4 It is a structural cross-sectional view of the middle cover;

[0022] Legend:

[0023] 1. Cylinder body; 2. Middle cover; 201. Through hole; 3. First chamber; 4. Second chamber; 5. First piston; 6. First piston rod; 7. Second piston; 8. Second piston rod; 9. Through hole; 10. One-way valve; 11. Oil storage chamber; 12. Connecting pipe; 13. Mounting ring; 14. Spring; 15. Third piston; 16. Limiting ring; 17. Oil delivery channel; 171. Oil inlet; 172. Oil outlet; 18. First mounting groove; 19. Retaining ring; 20. Second mounting groove; 21. First sealing ring; 22. Third mounting groove; 23. Double O-ring; 24. Fourth mounting groove; 25. Second sealing ring; 26. Sealing cover; 27. First air inlet and outlet; 28. Second air inlet and outlet; 29. ​​Third air inlet and outlet; 30. Fourth air inlet and outlet. DETAILED DESCRIPTION

[0024] 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.

[0025] Specific examples are given below.

[0026] See also Figure 1-Figure 4 The utility model discloses a multi-position cylinder, comprising a cylinder body 1, wherein a middle cover 2 is fixedly mounted in the cylinder body 1, wherein the middle cover 2 divides the inside of the cylinder body 1 into a first chamber 3 and a second chamber 4, wherein the cylinder body 1 is provided with a first air inlet and outlet 27 and a second air inlet and outlet 28 at the front and rear ends of the first chamber 3, wherein the cylinder body 1 is provided with a third air inlet and outlet 29 and a fourth air inlet and outlet 30 at the front and rear ends of the second chamber 4, wherein a first piston 5 is mounted in the first chamber 3, wherein a first piston rod 6 is mounted on one side of the first piston 5, wherein one end of the first piston rod 6 extends to the outside of the cylinder body 1, wherein a second piston 7 is mounted in the second chamber 4, wherein a second piston rod 8 is mounted on one side of the second piston 7, wherein a through hole 201 is provided at the center of the middle cover 2, wherein the second piston rod 8 slides through the through hole 201;

[0027] The middle cover 2 is provided with a through hole 9, and a one-way valve 10 is fixedly installed inside the through hole 9 near the first chamber 3 and the second chamber 4. The one-way valve 10 restricts the gas in the first chamber 3 and the second chamber 4 to flow only into the through hole 9. The side wall of the cylinder body 1 is provided with an oil storage chamber 11, and the oil storage chamber 11 is connected to the through hole 9 through a connecting pipe 12. A sealing cover 26 is installed at the oil storage chamber 11 by threaded rotation. A spring 14 is fixedly installed in the connecting pipe 12 through a mounting ring 13. The wall is provided with a third piston 15, the spring 14 is terminated at one side of the third piston 15, a limit ring 16 is fixedly provided in the connecting pipe 12 for limiting the position of the third piston 15, an array of oil delivery channels 17 are provided between the oil storage chamber 11 and the first chamber 3 and the second chamber 4, the oil delivery channel 17 includes an oil inlet 171 and an oil outlet 172, the oil inlet 171 is located at one side of the oil storage chamber 11, the aperture of the oil inlet 171 is larger than the oil outlet 172, and the aperture of the oil outlet 172 is one-fifth of the oil inlet 171 First, when the multi-position cylinder is working, when replenishing lubricant to the multi-position cylinder, the staff first opens the sealing cover 26, adds lubricant to the oil storage chamber 11, and the sealing cover 26 is transparent, so the lubricant content in the internal oil storage chamber 11 can be visually checked, and then the sealing cover 26 can be closed. When the multi-position cylinder is working, gas is filled into or sucked out of the first chamber 3 and the second chamber 4, so that the first piston 5 and the second piston 7 move in the cylinder body 1. When the first chamber 3 and the second chamber 4 are filled with gas to generate air pressure, the air pressure pushes the one-way valve 10 to open, allowing the gas to enter. After entering the through hole 9, the gas pushes the third piston 15 to move, the spring 14 is compressed, and the third piston 15 compresses the space in the oil storage chamber 11. Under the action of gas pressure, the lubricant is pushed into the oil inlet 171 of the oil delivery channel 17, and then the lubricant enters the first chamber 3 and the second chamber 4 through the oil outlet 172. The first piston 5 and the second piston 7 keep moving and keep in contact with the lubricant entering, so as to lubricate their contact surfaces. In addition, the lubrication process does not require the use of external power, but can be synchronized by the operation of multiple-position cylinders, thereby greatly improving work efficiency.

[0028] Furthermore, a first mounting groove 18 is provided on the inner wall of the cylinder body 1, and the middle cover 2 is fixedly assembled in the first mounting groove 18 by means of retaining springs 19 arranged on both sides. During operation, when the multi-position cylinder is installed and assembled, the middle cover 2 is stuck in the first mounting groove 18, and the staff then respectively clamps the two retaining springs 19 in the gaps between the first mounting groove 18 and the two sides of the middle cover 2 to complete the assembly of the center cover. Such a structural design eliminates the need for splicing the two cylinder shells of the multi-position cylinder, thereby ensuring the working accuracy and axiality of the multi-position cylinder.

[0029] Furthermore, at least two groups of second mounting grooves 20 are provided on the circumferential surface of the middle cover 2, and a first sealing ring 21 is installed in the second mounting groove 20. During operation, the first sealing ring 21 arranged between the middle cover 2 and the inner wall of the first mounting groove 18 improves the sealing performance inside the cylinder body 1, thereby ensuring the isolation of the first chamber 3 and the second chamber 4.

[0030] Furthermore, a third mounting groove 22 is provided on the circumferential surface of the first piston 5 and the second piston 7, and a double O-ring 23 is installed in the third mounting groove 22. When working, the double O-ring 23 arranged between the first piston 5 and the second piston 7 and the inner wall of the cylinder body 1 further ensures the sealing performance and improves the accuracy of the multi-position cylinder.

[0031] Furthermore, at least two fourth mounting grooves 24 are formed on the inner wall of the through hole 201 , and second sealing rings 25 are installed in the fourth mounting grooves 24 . When the second piston rod 8 moves during operation, the second sealing ring 25 improves the sealing performance.

[0032] 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.

[0033] 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 multi-position cylinder, comprising a cylinder body (1), characterized in that: A middle cover (2) is fixedly mounted inside the cylinder body (1), and the middle cover (2) divides the inside of the cylinder body (1) into a first chamber (3) and a second chamber (4). The cylinder body (1) is provided with a first air inlet and outlet (27) and a second air inlet and outlet (28) at the front and rear ends of the first chamber (3), and a third air inlet and outlet (29) and a fourth air inlet and outlet (30) at the front and rear ends of the second chamber (4). A first piston (5) is mounted inside the first chamber (3), and a first piston rod (6) is mounted on one side of the first piston (5), and one end of the first piston rod (6) extends to the outside of the cylinder body (1). A second piston (7) is mounted inside the second chamber (4), and a second piston rod (8) is mounted on one side of the second piston (7). A through hole (201) is opened at the center of the middle cover (2), and the second piston rod (8) slides through the through hole (201); The middle cover (2) is provided with a through hole (9), and one-way valves (10) are fixedly installed inside the through hole (9) near the first chamber (3) and the second chamber (4), and the one-way valves (10) restrict the gas in the first chamber (3) and the second chamber (4) to flow only into the through hole (9). The side wall of the cylinder body (1) is provided with an oil storage chamber (11), and the oil storage chamber (11) and the through hole (9) are connected by a connecting pipe (12). A spring (14) is fixedly arranged in the connecting tube (12) via a mounting ring (13); a third piston (15) is arranged on the inner wall of the connecting tube (12); the spring (14) is terminated at one side of the third piston (15); a limiting ring (16) is fixedly arranged in the connecting tube (12) for limiting the position of the third piston (15); and a plurality of oil delivery channels (17) are provided between the oil storage chamber (11) and the first chamber (3) and the second chamber (4).

2. A multi-position cylinder according to claim 1, characterized in that: The oil delivery channel (17) comprises an oil inlet (171) and an oil outlet (172); the oil inlet (171) is located at one side of the oil storage chamber (11); the diameter of the oil inlet (171) is larger than that of the oil outlet (172), and the diameter of the oil outlet (172) is one fifth of that of the oil inlet (171).

3. A multi-position cylinder according to claim 1, characterized in that: The inner wall of the cylinder body (1) is provided with a first mounting groove (18), and the middle cover (2) is fixedly assembled in the first mounting groove (18) by means of retaining springs (19) arranged on both sides.

4. A multi-position cylinder according to claim 1, characterized in that: At least two groups of second installation grooves (20) are provided on the circumferential surface of the middle cover (2), and first sealing rings (21) are installed in the second installation grooves (20).

5. A multi-position cylinder according to claim 1, characterized in that: A third mounting groove (22) is provided on the circumferential surface of each of the first piston (5) and the second piston (7), and a double O-type sealing ring (23) is installed in the third mounting groove (22).

6. A multi-position cylinder according to claim 1, characterized in that: At least two fourth installation grooves (24) are provided on the inner wall of the through hole (201), and a second sealing ring (25) is installed in the fourth installation groove (24).

7. A multi-position cylinder according to claim 1, characterized in that: The oil storage chamber (11) is assembled with a sealing cover (26) by means of threaded rotation.

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