Pneumatic device

Abstract

The utility model relates to a pneumatic device which comprises a gear shaft, bearings, a shaft sleeve and an ejector pin structure, the bearings are installed at the two ends of the shaft sleeve, the outer surface of the gear shaft is sleeved with the shaft sleeve, the bearings are installed between the shaft sleeve and the gear shaft, and the ejector pin structure is installed on the shaft sleeve. A first air hole, a second air hole, a first cavity and a second cavity are formed in the gear shaft, the first cavity and the second cavity form a movable cavity, the ejector pin structure moves in the movable cavity, the first air hole is communicated with the first cavity, and the second air hole is communicated with the second cavity. The pneumatic device is convenient to disassemble and assemble, parts can be rapidly replaced, the efficiency of replacing the parts is improved, maintenance is convenient, the driving precision is high, the ejector pin sleeve can guarantee the coaxiality of an ejector pin structure, the sealing ring is arranged on the outer surface of the gear shaft in a sleeving mode, the first cavity and the second cavity are separated, and the sealing effect is good. And the air tightness of the first chamber and the second chamber is ensured.

Description

Technical Field

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

[0002] A pneumatic high-pressure mechanism uses compressed air as its energy source, converting it into mechanical energy to propel a piston, which in turn pushes a push rod back and forth. During operation, high-pressure air is regulated by a pressure-regulating valve before entering through the air inlet connector. Air is exchanged through a reversing valve to enable the piston to reciprocate. However, frequent reversing of the reversing valve can often lead to problems such as incomplete reversing, unreliable sealing, and air leakage, resulting in a short service life and inconvenient maintenance and replacement. Utility Model Content

[0003] The main purpose of the utility model is to provide a pneumatic device to solve the above technical problems, which has a simple structure, strong sealing performance and is easy to repair and replace.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A pneumatic device includes a gear shaft, a bearing, a sleeve and a ejector structure, wherein the bearings are mounted at both ends of the sleeve, the sleeve is sleeved on the outer surface of the gear shaft, the bearings are mounted between the sleeve and the gear shaft, a first air hole, a second air hole, a first chamber and a second chamber are provided in the gear shaft, the first chamber and the second chamber constitute an active chamber, the ejector structure moves in the active chamber, the first air hole is connected to the first chamber, and the second air hole is connected to the second chamber.

[0006] As a preferred technical solution, the ejector structure includes a piston, an ejector fixing seat and an ejector, the piston is fixed to one end of the ejector fixing seat, the ejector is fixed to the other end of the ejector fixing seat, and the piston moves in the first chamber.

[0007] As a preferred technical solution, it further includes an ejector sleeve, which is threadedly arranged on the end of the gear shaft and at the opening of the active chamber, and is sleeved on the outer surface of the ejector.

[0008] As a preferred technical solution, a limiting groove is provided at the end of the ejector sleeve, and the outer surface of the limiting groove matches the end of the ejector fixing seat.

[0009] As a preferred technical solution, it further includes a sealing ring, which is fixed on the shaft sleeve and sleeved on the gear shaft and is located between the first air hole and the second air hole.

[0010] The beneficial effects of the present utility model are as follows: the pneumatic device is easy to disassemble and assemble, can realize quick replacement of parts, improves the efficiency of replacing parts, is easy to maintain, and has high driving precision. The ejector sleeve can ensure the coaxiality of the ejector structure. A sealing ring is sleeved on the outer surface of the gear shaft to separate the first chamber and the second chamber, thereby ensuring the airtightness of the first chamber and the second chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the pneumatic device involved in the present utility model. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0013] like Figure 1 As shown, a pneumatic device includes a gear shaft 1, a bearing 6, a sleeve 2, a pin sleeve 4, a sealing ring 3 and a pin structure 5. The bearings 6 are installed at both ends of the sleeve 2, and the sleeve 2 is sleeved on the outer surface of the gear shaft 1. The bearings 6 are installed between the sleeve 2 and the gear shaft 1. The inner ring and outer ring of the bearing 6 are respectively installed on the gear shaft 1 and the sleeve 2 by interference fit. The sleeve 2 is fixed on the equipment. The gear shaft 1 can rotate freely relative to the sleeve 2 through the bearing 6. A first air hole 13, a second air hole 14, a first chamber 11 and a second chamber 12 are provided in the gear shaft 1. The first chamber 11 and the second chamber 12 constitute an active chamber. The pin structure 5 moves in the active chamber. The first air hole 13 is connected to the first chamber 11, and the second air hole 14 is connected to the second chamber 12. The pin sleeve 4 is threadedly provided at the end of the gear shaft 1 and is provided in the active chamber. At the opening of the chamber, the ejector structure 5 is inserted into the ejector sleeve 4, which can guide the movement of the ejector structure 5. The sealing ring 3 is fixed on the shaft sleeve 2 and sleeved on the gear shaft 1, located between the first air hole 13 and the second air hole 14, for preventing ventilation between the first air hole 13 and the second air hole 14, thereby affecting the moving speed of the ejector structure 5. The ejector structure 5 includes a piston 51, an ejector fixing seat 53 and an ejector 52. The piston 51 is fixed to one end of the ejector fixing seat 53, and the ejector 52 is fixed to the other end of the ejector fixing seat 53. The ejector sleeve 4 is sleeved on the outer surface of the ejector 52. The piston 51 moves in the first chamber 13, thereby driving the ejector 52 to extend out of the ejector sleeve 4. A limiting groove 41 is provided at the end of the ejector sleeve 4. The outer surface of the limiting groove 41 matches the end of the ejector fixing seat 53 to limit the extension distance of the ejector 52.

[0014] When the ejector structure 5 needs to be extended, air is introduced into the first air hole 13 to push the piston 51 in the first chamber 11 to move toward the second chamber 12. The gas in the second chamber 12 leaves from the second air hole 14 under the push of the piston 51 until the ejector fixing seat 53 abuts against the ejector sleeve 4; when the ejector structure 5 needs to be retracted, air is introduced into the second air hole 14 to push the piston 51 in the first chamber 11 to move toward the bottom of the first chamber 11. The gas in the first chamber 11 leaves from the first air hole 13 under the push of the piston 51 until the piston 51 moves to the bottom of the first chamber 11; when maintenance is required, the ejector sleeve 4 can be removed from the gear shaft 1, so that the ejector structure 5 can be removed to maintain the various components in the pneumatic device.

[0015] The above-described embodiments are merely preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features, and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A pneumatic device, characterized in that: It includes a gear shaft, a bearing, a sleeve and a pin structure, the bearings are installed at both ends of the sleeve, the sleeve is sleeved on the outer surface of the gear shaft, the bearings are installed between the sleeve and the gear shaft, and the gear shaft is provided with a first air hole, a second air hole, a first chamber and a second chamber. The first chamber and the second chamber constitute an active chamber, and the pin structure moves in the active chamber. The first air hole is connected to the first chamber, and the second air hole is connected to the second chamber.

2. The pneumatic device according to claim 1, characterized in that The ejector structure includes a piston, an ejector fixing seat and an ejector. The piston is fixed to one end of the ejector fixing seat, and the ejector is fixed to the other end of the ejector fixing seat. The piston moves in the first chamber.

3. The pneumatic device according to claim 2, characterized in that It further comprises an ejector sleeve, which is threadedly arranged on the end of the gear shaft and at the opening of the active chamber, and is sleeved on the outer surface of the ejector.

4. The pneumatic device according to claim 3, characterized in that A limiting groove is provided at the end of the ejector sleeve, and an outer surface of the limiting groove matches the end of the ejector fixing seat.

5. The pneumatic device according to claim 4, characterized in that: It further includes a sealing ring, which is fixed on the shaft sleeve and sleeved on the gear shaft and located between the first air hole and the second air hole.

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