Three-position air cylinder with adjustable middle position

Abstract

The three-position air cylinder comprises a left end cover, a left cylinder barrel, a middle end cover, a right cylinder barrel and a right end cover which are sequentially connected, a piston rod is arranged in the left end cover and the left cylinder barrel in a sliding mode, a left piston and a limiting sleeve are installed at the right end of the piston rod, an adjusting rod is arranged in the right cylinder barrel and the right end cover, and the adjusting rod is in threaded connection with the right end cover. A limiting piece is installed at the left end of the adjusting rod, and an adjusting sleeve is installed at the right end of the adjusting rod. The left end of the piston rod extends out of the left end cover, the left air port faces the left side of the left piston, the middle air port faces the right side of the left piston and the left side of the right piston, and the right air port faces the right side of the right piston. The device is simple in structure and small in occupied space; the purpose that the middle of the three-position air cylinder is adjustable is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cylinder, and relates to three-position cylinder with adjustable middle position. BACKGROUND

[0002] In mechanical devices requiring three-position positioning, a pneumatic three-position cylinder is preferred due to its high cost performance. In the prior art, the three-position cylinder has three fixed positions, i.e., left, middle and right positions. If the middle position needs to be adjusted, it is impossible to do so. SUMMARY

[0003] The utility model discloses a three-position cylinder with adjustable middle position, which can solve the above problems.

[0004] According to the technical scheme of the utility model, a three-position cylinder with adjustable middle position comprises left end cover, left cylinder barrel, middle end cover, right cylinder barrel, right end cover which are connected in sequence, a piston rod is slidably arranged in the left end cover and the left cylinder barrel, the left end of the piston rod is provided with a left piston and a limiting sleeve, an adjusting rod is arranged in the right cylinder barrel and the right end cover, the adjusting rod is threadedly connected with the right end cover, a limiting sheet is arranged at the left end of the adjusting rod, an adjusting sleeve is arranged at the right end of the adjusting rod, and a right piston is slidably arranged in the right cylinder barrel.

[0005] As a further improvement of the utility model, the left end of the piston rod extends out of the left end cover.

[0006] As a further improvement of the utility model, the left gas port faces the left side of the left piston, the middle gas port faces the right side of the left piston and the left side of the right piston, and the right gas port faces the right side of the right piston.

[0007] As a further improvement of the utility model, the piston rod, the left piston and the limiting sleeve are fixed together through a nut.

[0008] As a further improvement of the utility model, the left end of the adjusting rod is fixed together with the limiting sheet through a nut.

[0009] As a further improvement of the utility model, the right end of the adjusting rod is connected with the adjusting sleeve through a threaded structure and a nut.

[0010] As a further improvement of the utility model, the left end cover, the middle end cover and the right end cover are fixed together to form the whole cylinder through a root pull rod and a nut.

[0011] As a further improvement of the utility model, the right piston is sleeved on the adjusting rod.

[0012] The utility model has the positive progress effect that:

[0013] The utility model has the advantages of simple structure, small space occupation and realization of the purpose of adjustable middle position of the three-position cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structural diagram of the utility model. DETAILED DESCRIPTION

[0015] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0016] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0017] It should be noted that the terms "first", "second" and the like in the specification and claims of the utility model and the above drawings are used to distinguish similar objects, not necessarily to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented. In addition, "including" and "having" and similar terms mean that in addition to those listed in "including" and "having", other unlisted contents can also be "including" and "having"; for example, a process, method, system, product or device that can contain a series of steps or units, not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0018] Due to the angle of the drawing, some parts may not be drawn, but their positions and connection relationships can be understood according to the text expression part.

[0019] For example, Figure 1As shown, the utility model is a three-position cylinder with adjustable middle position, which comprises left end cover 1, left cylinder 3, middle end cover 5, right cylinder 7, right end cover 9 connected in sequence, piston rod 2 is slidably arranged in left cylinder 3 and left end cover 1, left end of piston rod 2 extends out of left end cover 1, left piston 4 and limiting sleeve 6 are installed at right end of piston rod 2, adjusting rod 11 is arranged in right cylinder 7 and right end cover 9, adjusting rod 11 is threadedly connected with right end cover 9, limiting sheet 12 is installed at left end of adjusting rod 11, adjusting sleeve 10 is installed at right end of adjusting rod 11, right piston 8 is slidably arranged in right cylinder 7.

[0020] Piston rod 2, left piston 4 and limiting sleeve 6 are fixed together through nuts.

[0021] Left end of adjusting rod 11 and limiting sheet 12 are fixed together through nuts.

[0022] Left end cover 1, middle end cover 5 and right end cover 9 are fixed to form the whole cylinder through four pull rods 13 and nuts.

[0023] Right piston 8 is sleeved on adjusting rod 11.

[0024] Sealing members are installed in the cylinder to ensure the air tightness between components.

[0025] The working process of the utility model is as follows:

[0026] The cylinder has three working positions: when left gas port 1-1 and right gas port 1-3 exhaust, and middle gas port 1-2 inhales, gas enters the cylinder body from middle gas port 1-2, drives left piston 4 to move leftwards until abutting against left end cover 1, and piston rod 2 reaches the leftmost position.

[0027] When left gas port 1-1 inhales, and middle gas port 1-2 and right gas port 1-3 exhaust, gas enters the cylinder body from left gas port 1-1, drives left piston 4 to move rightwards until abutting against middle end cover 5, and piston rod 2 reaches the rightmost position.

[0028] When right gas port 1-3 inhales, and left gas port 1-1 and middle gas port 1-2 exhaust, gas enters the cylinder body from right gas port 1-3, drives right piston 8 to move leftwards until abutting against limiting sheet 12, and piston rod 2 is in the adjustable middle position.

[0029] When the intermediate position needs to be adjusted, the rotating adjusting sleeve 10 drives the adjusting rod 11 to rotate. Since the adjusting rod 11 is in threaded connection with the right end cover 9 and the right end cover 9 is fixed, the adjusting rod 11 horizontally moves while rotating, so that the position of the limiting sheet 12 moves left and right. The position of the limiting sheet 12 is adjusted and the piston rod 2 is adjusted at the intermediate position.

[0030] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. A middle adjustable three-position cylinder, comprising left end cover (1), left cylinder barrel (3), middle end cover (5), right cylinder barrel (7), right end cover (9) connected in sequence, characterized in that, The left end cover (1) and the left cylinder (3) are slidably provided with a piston rod (2), the piston rod (2) is provided at the right end with a left piston (4) and a limiting sleeve (6), the right cylinder (7) and the right end cover (9) are provided with an adjusting rod (11), the adjusting rod (11) is threadedly connected with the right end cover (9), the adjusting rod (11) is provided at the left end with a limiting piece (12), the adjusting rod (11) is provided at the right end with an adjusting sleeve (10), and the right cylinder (7) is slidably provided with a right piston (8); the left end cover (1), the middle end cover (5) and the right end cover (9) are respectively provided with a left gas port (1-1), a middle gas port (1-2) and a right gas port (1-3).

2. The mid-adjustable three position cylinder of claim 1, wherein, The piston rod (2) is provided at the left end with the left end cover (1).

3. The mid-adjustable three position cylinder of claim 1, wherein, The left gas port (1-1) faces the left side of the left piston (4), the middle gas port (1-2) faces the right side of the left piston (4) and the left side of the right piston (8), and the right gas port (1-3) faces the right side of the right piston (8).

4. The mid-adjustable three position cylinder of claim 1, wherein, The piston rod (2), the left piston (4) and the limiting sleeve (6) are fixed together by a nut.

5. The mid-adjustable three position cylinder of claim 1 wherein, The left end of the adjusting rod (11) and the limiting piece (12) are fixed together by a nut.

6. The mid-adjustable three position cylinder of claim 1, wherein, The right end of the adjusting rod (11) is connected with the adjusting sleeve (10) by a threaded structure and a nut.

7. The mid-adjustable three position cylinder of claim 1 wherein, The left end cover (1), the middle end cover (5) and the right end cover (9) are fixed by four tie rods (13) and nuts to form the whole cylinder.

8. The mid-adjustable three position cylinder of claim 1, wherein, The right piston (8) is sleeved on the adjusting rod (11).

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