Stroke-adjustable air cylinder

Abstract

The utility model relates to the technical field of air cylinders, in particular to a stroke-adjustable air cylinder which comprises a cylinder body, a tail end cover and a head end cover, the tail end cover and the head end cover are arranged at the two ends of the cylinder body and fixedly connected through a connecting rod and a nut, and the head end cover penetrates through and is in sliding connection with a piston rod. The end, close to the interior of the cylinder body, of the piston rod is fixedly connected with a piston disc, the tail end cover is slidably connected with a piston head in a penetrating mode, the piston head is provided with an air hole in a penetrating mode, a liquid injection opening is formed in the arc face of the tail end cover in a penetrating mode, and the tail end cover is in threaded connection with an adjuster close to the outer arc wall of the liquid injection opening. According to the stroke-adjustable air cylinder, one end of the piston head of the air cylinder is arranged to be of a slidable adjusting structure, when the stroke of the air cylinder is adjusted, only the piston head needs to slide on the tail end cover, the position, entering the air cylinder, of the piston head is adjusted, at the moment, the stroke distance of the piston rod and the piston disc can be shortened, and the air cylinder does not need to be disassembled and replaced; therefore, the stroke can be adjusted, and the adjustment convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinders, and specifically, to an adjustable-stroke cylinder. Background Art

[0002] A cylinder refers to a cylindrical metal component that guides a piston to perform linear reciprocating motion in the cylinder. Air expands in the engine cylinder to convert thermal energy into mechanical energy; gas is compressed by the piston in the compressor cylinder to increase pressure. Cylinders are now widely used in industries such as printing, semiconductors, automation control, and robotics. A cylinder is composed of a cylinder barrel, end caps, a piston, a piston rod, and seals, etc. The stroke of the cylinder is determined according to the lengths of the cylinder barrel and the piston rod.

[0003] After the current cylinders are produced, the lengths of the cylinder barrel and the piston rod are fixed. Therefore, when the cylinder is in use, the stroke of the cylinder is a fixed distance. However, in many occasions, the amplitude of the movement of the moving part needs to be adjusted. Generally, cylinders with different strokes are replaced for use. During the adjustment process, the cylinder needs to be disassembled and replaced. Therefore, the process of adjusting the cylinder stroke in the current work is relatively cumbersome and troublesome. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide an adjustable-stroke cylinder, which has the advantage of being convenient to adjust, and solves the problem that after the current cylinders are produced, the lengths of the cylinder barrel and the piston rod are fixed. Therefore, when the cylinder is in use, the stroke of the cylinder is a fixed distance. However, in many occasions, the amplitude of the movement of the moving part needs to be adjusted. Generally, cylinders with different strokes are replaced for use. During the adjustment process, the cylinder needs to be disassembled and replaced. Therefore, the process of adjusting the cylinder stroke in the current work is relatively cumbersome and troublesome.

[0006] (2) Technical Solutions

[0007] To achieve the above purpose, the present utility model provides the following technical solutions. The technical solution adopted by an adjustable-stroke cylinder is: it includes a cylinder body, a tail end cap, and a head end cap. The tail end cap and the head end cap are arranged at both ends of the cylinder body, and the tail end cap and the head end cap are fixedly connected by a connecting rod and a nut. The head end cap penetrates and is slidably connected with a piston rod. One end of the piston rod close to the inside of the cylinder body is fixedly connected with a piston disc. The tail end cap penetrates and is slidably connected with a piston head. The piston head is provided with a through hole for air. A liquid injection port is provided through the arc surface of the tail end cap. A regulator is threadedly connected to the outer arc wall of the tail end cap near the liquid injection port.

[0008] As a preferred solution, one end of the regulator away from the tail end cap penetrates and is threadedly connected with a threaded push rod. One end of the threaded push rod close to the inner groove of the regulator is rotatably connected with an adjusting piston.

[0009] As a preferred solution, a rotary handle is fixedly connected to the outer end of the threaded push rod.

[0010] As a preferred solution, a circular groove is formed on one side of the piston disc close to the head end cover, an insertion ring is fixedly connected to the side wall of the head end cover opposite to the circular groove, and the insertion ring is adaptively inserted into the circular groove.

[0011] As a preferred solution, sealing rings are fixedly embedded at the relative positions of the outer arc wall and the inner arc wall of the insertion ring.

[0012] As a preferred solution, guide rings are fixedly embedded on the outer arc walls of the piston disc and the piston head, and sealing rings are fixedly embedded on the outer arc walls of the piston disc and the piston head.

[0013] As a preferred solution, an inner hole is formed on one side of the tail end cover close to the inner groove of the cylinder body, a spring is fixedly connected inside the inner hole of the tail end cover, and the other end of the spring is fixedly connected to the opposite outer wall of the piston head.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present utility model provides an adjustable-stroke cylinder, which has the following beneficial effects:

[0016] 1. For this adjustable-stroke cylinder, one end of the piston head of the cylinder is set to a slidable and adjustable structure. Therefore, when the stroke of the cylinder needs to be adjusted, only the piston head needs to be slid on the tail end cover. When adjusting the position of the piston head entering the cylinder body, the stroke distance of the piston rod and the piston disc can be shortened at this time, and vice versa, the stroke can be increased. The adjustment of the cylinder stroke can be realized without disassembling and replacing the cylinder, improving the convenience of adjustment.

[0017] 2. For this adjustable-stroke cylinder, by setting a regulator, the regulator injects liquid into the gap between the cylinder body and the piston head through the liquid injection port, which can drive the piston head to move towards the inside of the cylinder, and vice versa, the piston head can be moved towards the outside of the cylinder body, realizing fast and convenient adjustment of the cylinder stroke. And after the liquid is injected, the piston head can be moved towards the inside of the cylinder body to achieve support, ensuring the stability of the piston head after adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional schematic diagram of the cylinder structure of the present utility model;

[0019] Figure 2 is a sectional three-dimensional schematic diagram of the cylinder structure of the present utility model;

[0020] Figure 3 is a sectional plan schematic diagram of the cylinder structure of the present utility model;

[0021] Figure 4 For the present utility model Figure 3 is a schematic enlarged structure view of part A.

[0022] In the figure: 1, cylinder block; 2, tail end cover; 3, head end cover; 4, piston rod; 5, piston disc; 6, piston head; 7, air hole; 8, liquid injection port; 9, regulator; 10, threaded push rod; 11, adjusting piston; 12, rotating handle; 13, circular groove; 14, inserting ring; 15, sealing ring; 16, sealing ring; 17, guiding ring; 18, spring. Specific embodiments

[0023] The following further describes in detail the embodiments of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0024] Embodiment 1

[0025] Please refer to Figures 1-4 , the present utility model: an adjustable stroke cylinder, including a cylinder block 1, a tail end cover 2 and a head end cover 3. The tail end cover 2 and the head end cover 3 are arranged at both ends of the cylinder block 1, and the tail end cover 2 and the head end cover 3 are fixedly connected by a connecting rod and a nut. The head end cover 3 penetrates and is slidably connected with a piston rod 4. One end of the piston rod 4 close to the inside of the cylinder block 1 is fixedly connected with a piston disc 5. The tail end cover 2 penetrates and is slidably connected with a piston head 6. The piston head 6 can move towards the inside of the cylinder block 1 at one end of the cylinder, shortening the space stroke inside the cylinder, realizing fast and efficient adjustment of the cylinder stroke, and there is no need for manual disassembly and replacement of the cylinder, improving the convenience of cylinder stroke adjustment. The piston head 6 is provided with an air hole 7 through it, and the arc surface of the tail end cover 2 is provided with a liquid injection port 8 through it. A regulator 9 is threadedly connected to the outer arc wall of the tail end cover 2 close to the liquid injection port 8. Liquid is injected into the cylinder block 1 through the regulator 9 and the liquid injection port 8, and then the piston head 6 is pushed towards the inside of the cylinder block 1, thereby facilitating fast and efficient adjustment and use of the cylinder stroke, making the cylinder stroke more stable and efficient.

[0026] One end of the regulator 9 away from the tail end cover 2 penetrates and is threadedly connected with a threaded push rod 10. One end of the threaded push rod 10 close to the inner groove of the regulator 9 is rotatably connected with an adjusting piston 11. One end of the threaded push rod 10 outside is fixedly connected with a rotating handle 12. By means of the threaded push rod 10 and the rotating handle 12, rotating the rotating handle 12 drives the threaded push rod 10 to rotate. During this process, the liquid inside the regulator 9 can be more accurately injected into the cylinder block 1, and the threaded push rod 10 and the end of the regulator 9 are threadedly engaged, so that the liquid entering the cylinder block 1 will not flow back due to pressure, ensuring the stability after the liquid pushes the piston head 6 to adjust the stroke.

[0027] Embodiment 2

[0028] Reference Figure 2 - Figure 3 , on the basis of the first embodiment, further improvements are made:

[0029] A circular groove 13 is formed on one side of the piston disk 5 close to the head end cover 3. An insertion ring 14 is fixedly connected to the side wall of the head end cover 3 opposite to the circular groove 13. The insertion ring 14 is adaptively inserted into the circular groove 13. Sealing rings 15 are fixedly connected to the relative positions of the outer arc wall and the inner arc wall of the insertion ring 14. When the piston disk 5 follows the piston rod 4 to perform a stroke, when the piston disk 5 moves to the position of the head end cover 3, at this time, the insertion ring 14 is inserted into the circular groove 13. The sealing rings 15 inside and outside the insertion ring 14 make the insertion into the circular groove 13 more sealed. Due to the sealing effect, the pressure inside the cavity of the insertion ring 14 and the circular groove 13 increases, thereby playing a role in buffering the piston disk 5.

[0030] Guide rings 17 are fixedly connected to the outer arc walls of the piston disk 5 and the piston head 6, and sealing rings 16 are fixedly connected to the outer arc walls of the piston disk 5 and the piston head 6. Through the guide rings 17 and the sealing rings 16, the movement process directions of the piston disk 5 and the piston head 6 are more stable, and the sealing effect is better.

[0031] An inner hole is formed on one side of the tail end cover 2 close to the inner groove of the cylinder block 1. A spring 18 is fixedly connected inside the inner hole of the tail end cover 2. The other end of the spring 18 is fixedly connected to the relative outer wall of the piston head 6. When the regulator 9 injects liquid into the cylinder block 1, when the piston head 6 slides on the tail end cover 2 and slides into the cylinder block 1, at this time, the spring 18 will be stretched. When the regulator 9 withdraws the liquid, at this time, the spring 18 can rebound to drive the piston head 6 to reset, increasing the available stroke of the cylinder, making the stroke adjustment of the cylinder efficient and convenient.

[0032] The working principle of the present utility model is: when in use and it is necessary to adjust the stroke of the cylinder, the regulator 9 is installed at the liquid injection port 8 of the tail end cover 2 through threads. Then, the rotary handle 12 is rotated by hand. The rotary handle 12 drives the threaded push rod 10 to rotate. Then, the threaded push rod 10 pushes the adjusting piston 11 to move into the regulator 9. At this time, the liquid in the regulator 9 enters the space between the cylinder block 1 and the piston head 6 through the liquid injection port 8, and pushes the piston head 6 into the cylinder block 1. At the same time, the piston head 6 stretches the spring 18. At this time, the piston head 6 occupies the space inside the cylinder block 1, making the available stroke of the piston rod 4 and the piston disk 5 shorter. On the contrary, the stroke can be made longer, realizing the rapid stroke adjustment of the cylinder without replacing the cylinder, making the adjustment of the cylinder convenient and efficient.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An adjustable stroke cylinder, comprising a cylinder body (1), a tail end cover (2) and a head end cover (3), wherein the tail end cover (2) and the head end cover (3) are arranged at both ends of the cylinder body (1), and the tail end cover (2) and the head end cover (3) are fixedly connected by a connecting rod and a nut, characterized in that: The head end cover (3) is penetrated by and slidably connected to a piston rod (4); one end of the piston rod (4) close to the inside of the cylinder body (1) is fixedly connected to a piston disc (5); the tail end cover (2) is penetrated by and slidably connected to a piston head (6); an air hole (7) is penetrated through the piston head (6); a liquid injection port (8) is penetrated through the curved surface of the tail end cover (2); and a regulator (9) is threadedly connected to the outer curved wall of the tail end cover (2) close to the liquid injection port (8).

2. The adjustable stroke cylinder according to claim 1, characterized in that: One end of the regulator (9) away from the tail end cover (2) penetrates through and is threadedly connected to a threaded push rod (10), and one end of the threaded push rod (10) close to the inner groove of the regulator (9) is rotatably connected to a regulating piston (11).

3. The adjustable stroke cylinder according to claim 2, characterized in that: The outer end of the threaded push rod (10) is fixedly connected to a rotating handle (12).

4. The adjustable stroke cylinder according to claim 1, characterized in that: A circular groove (13) is formed on one side of the piston disc (5) close to the head end cover (3); an insert ring (14) is fixedly connected to the side wall of the circular groove (13) of the head end cover (3); and the insert ring (14) is adapted to be plugged into the circular groove (13).

5. The adjustable stroke cylinder according to claim 4, characterized in that: A sealing ring (15) is embedded and fixedly connected at relative positions of the outer arc wall and the inner arc wall of the insert ring (14).

6. The adjustable stroke cylinder according to claim 1, characterized in that: The outer arc walls of the piston disc (5) and the piston head (6) are both embedded with a guide ring (17) and fixedly connected thereto, and the outer arc walls of the piston disc (5) and the piston head (6) are both embedded with a sealing ring (16) and fixedly connected thereto.

7. The adjustable stroke cylinder according to claim 1, characterized in that: An inner hole is formed on one side of the tail end cover (2) close to the inner groove of the cylinder body (1), a spring (18) is fixedly connected inside the inner hole of the tail end cover (2), and the other end of the spring (18) is fixedly connected to the outer wall relative to the piston head (6).

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