Piston device and pneumatic actuating mechanism

Abstract

The utility model relates to a piston device and a pneumatic actuating mechanism, which are arranged on the pneumatic actuating mechanism, the piston device comprises a body, a first through hole is arranged on the body along the thickness direction, the edge of the body is provided with a connecting part, and the connecting part extends along the thickness direction of the body; the connecting sleeve is arranged on the body, the connecting sleeve and the connecting part are located on the same side, the connecting sleeve comprises a first end and a second end in the thickness direction of the body, the end, connected with the body, of the connecting sleeve has radian, the connecting sleeve is provided with a second through hole, and the second through hole communicates with the first through hole. According to the piston device, stress between the connecting sleeve and the body can be reduced, so that cracking between the connecting sleeve and the body is effectively avoided, the overall strength of the piston device is improved, compared with an original piston device structure, the problem that the welding position of the connecting sleeve and the body of the piston device is frequently cracked is solved, and the service life of the piston device is prolonged. Therefore, the safety and the reliability of the piston device in the use process are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of piston devices, in particular to a piston device and a pneumatic actuator. Background Art

[0002] In the prior art, the piston of the piston device of the pneumatic actuator is formed by stamping a steel plate with uniform thickness. Referring to Figure 1 in the attached drawings of the specification, the connecting sleeve assembled on the piston is manufactured by machining, and its shape is usually a cylindrical structure. The piston and the connecting sleeve are connected by welding to form a piston device.

[0003] The disadvantages of the prior art are that, referring to Figure 1 and Figure 2 shown in the attached drawings of the specification, due to the low mechanical strength of the welded connection and the right-angle connection between the connecting sleeve and the piston, the stress is relatively concentrated, resulting in frequent cracking at the welded joint between the piston and the valve sleeve. On the one hand, the service life of the piston device is reduced, and on the other hand, there are also potential safety hazards. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the present utility model is to overcome the deficiencies in the prior art and provide a piston device and a pneumatic actuator, which can optimize the connection between the piston and the connecting sleeve, effectively improve the structural strength of the piston device, and solve the problem of frequent cracking at the welded joint between the piston and the connecting sleeve, thereby ensuring the safe and reliable use of the equipment.

[0005] To solve the above technical problem, the present utility model provides a piston device, which is installed on a pneumatic actuator and includes

[0006] a body, on which a first through hole is provided along the thickness direction, and the edge of the body has a connecting portion, and the connecting portion extends along the thickness direction of the body;

[0007] a connecting sleeve, which is arranged on the body and on the same side as the connecting portion. The connecting sleeve includes a first end and a second end along the thickness direction of the body. The first end is connected to the body, and the projected area of the first end along the thickness direction of the body is larger than the projected area of the second end along the thickness direction of the body. One end of the connecting sleeve connected to the body has a radian, and the connecting sleeve has a second through hole, and the second through hole is communicated with the first through hole.

[0008] In an embodiment of the present utility model, the body and the connecting sleeve are integrally formed.

[0009] In an embodiment of the present utility model, the surface area of one end of the connecting sleeve connected to the body is larger than the surface area of the end of the connecting sleeve away from the body.

[0010] In an embodiment of the present utility model, the connecting sleeve is frustum-shaped.

[0011] In an embodiment of the present utility model, the thickness of the body is 8 - 12 mm.

[0012] In an embodiment of the present utility model, the first through hole is located at the center of the body.

[0013] In an embodiment of the present utility model, the connecting sleeve is arranged at the center of the body, and the second through hole is arranged at the center of the connecting sleeve.

[0014] In an embodiment of the present utility model, the connecting portion and the body are integrally formed.

[0015] In an embodiment of the present utility model, the extending direction of the connecting portion is the same as the thickness direction of the body, and a chamfer is provided at the connection of the connecting portion and the body.

[0016] The present utility model also provides a pneumatic actuator, including a piston device as described above.

[0017] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0018] A piston device according to the present utility model is provided with a body, a connecting portion, and a connecting sleeve. The connecting portion is arranged at the edge of the body, and the extending direction of the connecting portion is the same as the thickness direction of the body. The connecting sleeve is arranged on the body and on the same side of the body as the connecting portion. Further, the connecting sleeve has a first end and a second end along the thickness direction of the body. The first end is connected to the body, and the projected area of the first end along the thickness direction of the body is larger than the projected area of the second end along the thickness direction of the body, increasing the structural strength. And, one end of the connecting sleeve connected to the body has a radian, so as to form an arc transition, effectively reducing the stress between the connecting sleeve and the body, thereby effectively avoiding cracking between the connecting sleeve and the body, and further improving the overall strength of the piston device. Compared with the structure of the original piston device, the problem that the welding position between the connecting sleeve and the body of the piston device often cracks is solved, and further the safety and reliability during the use of the piston device are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments of the present utility model in combination with the drawings, where:

[0020] Figure 1 is a schematic structural diagram of the prior art of the present utility model.

[0021] Figure 2 It is a physical schematic diagram of the prior art of the present utility model.

[0022] Figure 3 It is a cross-sectional schematic diagram of the first embodiment of the present utility model.

[0023] Figure 4 It is a cross-sectional schematic diagram of the second embodiment of the present utility model (the connecting sleeve and the body are integrally formed).

[0024] Figure 5 is Figure 4 physical diagram of

[0025] Explanation of the reference numerals in the drawings of the specification: 1. Body; 2. Connecting part; 20. Chamfer; 3. Connecting sleeve; 30. Second through hole; 31. First end; 32. Second end. Specific embodiments

[0026] The following further illustrates the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0027] Embodiment 1

[0028] Referring to Figure 1 as shown, the present utility model discloses a piston device, the piston device is installed in a pneumatic actuator, the piston device includes a body 1, a first through hole 10 is provided in the body 1 along the thickness direction, an edge of the body 1 has a connecting part 2, and the connecting part 2 extends along the thickness direction of the body 2. The body 1 can play a pressure-bearing role.

[0029] The piston device further includes a connecting sleeve 3, the connecting sleeve 3 is arranged on the body 1 and is on the same side of the body 1 as the connecting part 2. Specifically, the connecting part 2 and the body 1 can enclose to form a receiving cavity, and the connecting sleeve 3 is located in the receiving cavity.

[0030] The connecting sleeve 3 includes a first end 31 and a second end 32 along the thickness direction of the body 1, the first end 31 is connected to the body 1, and a projection area of the first end 31 along the thickness direction of the body is larger than a projection area of the second end 32 along the thickness direction of the body 1.

[0031] It should be noted that an end of the connecting sleeve 3 connected to the body 1 has a radian, so as to form an arc transition, effectively reducing the stress between the connecting sleeve 3 and the body 1, thereby effectively avoiding cracking between the connecting sleeve 3 and the body 1.

[0032] One end of the connecting sleeve 3 connected to the body 1 has a radian. The connecting sleeve 3 has a second through hole 30, and the second through hole 30 communicates with the first through hole 10.

[0033] It can be known from this that a piston device to be protected by the present utility model is provided with a body, a connecting portion, and a connecting sleeve. The connecting portion is arranged at the edge of the body, and the extending direction of the connecting portion is the same as the thickness direction of the body. The connecting sleeve is arranged on the body and is on the same side of the body as the connecting portion. Further, the connecting sleeve has a first end and a second end along the thickness direction of the body. The first end is connected to the body, and the projected area of the first end along the thickness direction of the body is larger than the projected area of the second end along the thickness direction of the body, increasing the structural strength. Moreover, one end of the connecting sleeve connected to the body has a radian, so that an arc transition can be formed, effectively reducing the stress between the connecting sleeve and the body, thereby effectively avoiding cracking between the connecting sleeve and the body, and further improving the overall strength of the piston device. Compared with the structure of the original piston device, the problem that the welding position between the connecting sleeve and the body of the piston device often cracks is solved, and thus the safety and reliability during the use of the piston device are ensured.

[0034] In this embodiment, the connecting sleeve 3 is a valve stem sleeve.

[0035] As a preferred implementation manner, the body 1 and the connecting sleeve 3 are integrally formed. At this time, the first through hole 10 and the second through hole 30 are actually the same through hole.

[0036] As a preferred implementation manner, the aperture sizes of the first through hole 10 and the second through hole 30 are the same.

[0037] As a preferred implementation manner, the connecting sleeve 3 is arranged in a frustum shape. In this way, the projection of the first end 31 is circular, and the projection of the second end 32 is circular. It should be noted that the aperture of the second through hole 30 is smaller than the diameter of the second end 32.

[0038] In this embodiment, the thickness of the body 1 is 8 - 12 mm. Preferably, the thickness of the body 1 is 12 mm. Compared with the prior art, the thickness of the body 1 is thickened, thereby improving the pressure-bearing capacity of the body 1 and enhancing the structural strength at the same time.

[0039] As a preferred implementation manner, the first through hole 10 is located at the center of the body 1.

[0040] Further, the connecting sleeve 3 is disposed at the center of the body 1, and the second through hole 30 is disposed at the center of the connecting sleeve 3. Meanwhile, the second through hole 30 communicates with the first through hole 10.

[0041] As a preferred embodiment, for the convenience of processing and assembly and to improve the structural strength, the connecting portion 2 and the body 1 are integrally formed.

[0042] Specifically, a chamfer 20 is provided at the connection of the connecting portion 2 and the body 1. As a preferred embodiment, the chamfer 20 is 45°.

[0043] Embodiment 2

[0044] The present utility model also discloses a pneumatic actuator, including a piston device as described in Embodiment 1.

[0045] Specifically, the connecting sleeve 3 of the piston device is connected to the valve stem of the pneumatic actuator, and the valve stem passes through the first through hole 10 and the second through hole 30 of the piston device.

[0046] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and defined, if the terms "disposed", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0047] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise clearly specifically defined.

[0048] In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0049] Obviously, the above embodiments are merely examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the creative utility model.

Claims

1. A piston device, installed in a pneumatic actuator, characterized in that: Comprising, A body, on which a first through hole is provided along the thickness direction, an edge of the body has a connecting portion, and the connecting portion extends along the thickness direction of the body; A connecting sleeve, which is arranged on the body and on the same side as the connecting portion, the connecting sleeve includes a first end and a second end along the thickness direction of the body, the first end is connected to the body, and a projection area of the first end along the thickness direction of the body is larger than a projection area of the second end along the thickness direction of the body, one end of the connecting sleeve connected to the body has a radian, the connecting sleeve has a second through hole, and the second through hole is communicated with the first through hole.

2. A piston device according to claim 1, characterized in that: The body and the connecting sleeve are integrally formed.

3. A piston device according to claim 1, characterized in that: A surface area of one end of the connecting sleeve connected to the body is larger than a surface area of one end of the connecting sleeve away from the body.

4. A piston device according to claim 1 or 3, characterized in that: The connecting sleeve is frustum-shaped.

5. A piston device according to claim 1, characterized in that: The thickness of the body is 8 - 12 mm.

6. A piston device according to claim 1, characterized in that: The first through hole is located at the center of the body.

7. A piston device according to claim 1, characterized in that: The connecting sleeve is arranged at the center of the body, and the second through hole is arranged at the center of the connecting sleeve.

8. A piston device according to claim 1, characterized in that: The connecting portion and the body are integrally formed.

9. A piston device according to claim 8, characterized in that: An extending direction of the connecting portion is the same as the thickness direction of the body, and a chamfer is provided at a connection of the connecting portion and the body.

10. A pneumatic actuator, characterized in that: A piston device comprising any one of claims 1 - 9.

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