Combined annular piston for magazine-type shotgun

Abstract

The utility model discloses a combined annular piston for a magazine-type hunting rifle, which utilizes the elasticity of the piston ring to ensure the flexibility between the piston and the moving part, and avoids the premature leakage of gunpowder gas, so that the hunting rifle can work stably and reliably. A combined annular piston for a magazine-type hunting rifle comprises an annular piston body, the piston body has an inner piston surface, the inner piston surface is used for sliding cooperation with a magazine tube, and also comprises a piston ring, the piston ring is an elastic ring with an open structure, the piston ring is sleeved on the piston body, an annular groove is provided on the outer peripheral surface of the piston body, the piston ring is located in the annular groove, the annular groove limits the axial position of the piston ring, the piston ring has an outer piston surface, and the outer piston surface is used for fitting with the inner wall of the gas guide hoop.

Description

Technical Field

[0001] The utility model relates to the technical field of firearms, in particular to a combined annular piston for a magazine-type hunting rifle. Background Art

[0002] Generally, the piston of a magazine-type shotgun is an integral type, which is used to transfer the energy generated by the high-pressure gunpowder gas in the barrel to the automatic machine, thereby achieving semi-automatic shooting. In order for the piston to transfer energy efficiently, it must have two points at the same time. The first is to maintain flexibility between the piston and the moving parts, that is, to keep enough gap between the two and maintain good lubrication (no lubrication when the gun is working); the second is to avoid the leakage of gunpowder gas in advance, which requires that the gap between the piston and the matching gas hoop and magazine tube is small enough. Due to the problem of different axes in the manufacturing and installation process of the magazine tube and the gas hoop, it is difficult for the integral piston to take into account the above two points, resulting in insufficient gun energy or piston movement stagnation during the shooting process. Summary of the invention

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a combined annular piston for a magazine-type shotgun, which utilizes the elasticity of the piston ring to ensure the flexibility between the piston and the moving part and avoid the premature leakage of gunpowder gas, so that the shotgun works stably and reliably.

[0004] The purpose of the utility model is achieved in this way:

[0005] A combined annular piston for a magazine-type shotgun comprises an annular piston body, the piston body having an inner piston surface, the piston inner piston surface being used for sliding cooperation with a magazine tube, and a piston ring, the piston ring being an elastic ring with an open structure, the piston ring being sleeved on the piston body, an annular groove being provided on the outer peripheral surface of the piston body, the piston ring being located in the annular groove, the annular groove limiting the axial position of the piston ring, the piston ring having an outer piston surface, the piston ring outer piston surface being used for abutting against the inner wall of an air guide hoop.

[0006] Preferably, an air-locking groove is provided on the inner circumferential surface of the piston.

[0007] Preferably, the outer circumferential surface of the piston ring is provided with straight lines, and the straight lines are used to clean the inner wall of the air guide ring.

[0008] Preferably, four clearance grooves are provided at one end of the piston body corresponding to the piston ring, and the clearance grooves are used for disassembling and assembling the piston ring.

[0009] Preferably, an end of the piston body corresponding to the piston ring is provided with a guiding inclined surface, and the guiding inclined surface is used for installing the piston ring.

[0010] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0011] 1. The combined piston structure is adopted, and the piston ring and the piston body are installed as one component, which has a simple structure and a small size.

[0012] 2. The piston ring is an open elastic ring that is loosely fitted on the piston body. Its main function is to prevent gunpowder gas from leaking from the gap between the piston and the gas guide hoop.

[0013] 3. The piston body is slidably matched with the magazine tube through the inner circular surface, and the air-blocking groove on the inner circular surface prevents the gunpowder gas from leaking between the piston and the magazine tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the present invention;

[0015] Figure 2 It is a working schematic diagram of the present invention;

[0016] Figure 3 It is a schematic diagram of the piston body of the present invention;

[0017] Figure 4 It is a schematic diagram of the piston ring of the present invention.

[0018] Attached photos

[0019] In the accompanying drawings, 1. piston body, 2. piston ring, 3. gun barrel, 4. gas hoop, 5. regulator, 6. magazine tube spring, 7. magazine tube, 8. bolt push rod, 101. gas hole, 102. air chamber, 103. outer cylindrical surface of piston ring, 104. inner cylindrical surface of piston, 105. air-blocking groove, 106. straight lines, 107. give way groove. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 4 , is an embodiment of a combined annular piston for a magazine-type shotgun, the piston is composed of an annular piston body 1 and a piston ring 2. The piston ring is an open elastic ring, and the piston ring is loosely sleeved on the piston body. The inner circular surface of the piston is used for sliding cooperation with the magazine tube, the outer peripheral surface of the piston body is provided with an annular groove, the piston ring is located in the annular groove, the annular groove limits the axial position of the piston ring, the piston ring has an outer circular surface of the piston ring, and the outer circular surface of the piston ring is used for fitting with the inner wall of the gas guide hoop.

[0021] After shooting, the gunpowder gas enters the gas chamber 102 through the gas guide hole 101 on the barrel to push the piston to move. Since the outer circumferential surface 103 of the piston ring has a good gas-locking effect, and the inner circumferential surface 104 of the piston slides with the magazine tube 7, and the inner circumferential surface has a gas-locking groove 105, the gunpowder gas is not easy to leak, so that the energy utilization rate of the gas guide system is high.

[0022] The outer surface of the piston ring is rolled with straight lines, and the inner wall of the air guide hoop 4 can be automatically cleaned while the piston moves.

[0023] The piston body is slidably matched with the magazine tube through the inner surface of the piston, and the gas-blocking groove 105 on the inner surface of the piston prevents the leakage of gunpowder gas from between the piston and the magazine tube. Four clearance grooves 107 are milled around the piston body to facilitate the removal and assembly of the piston ring. A guide slope is provided at one end of the piston body corresponding to the piston ring, and the guide slope is used to install the piston ring.

[0024] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A combined annular piston for a magazine-type shotgun, comprising an annular piston body, the piston body having an inner piston surface, the inner piston surface being used for slidingly cooperating with a magazine tube, characterized in that: It also includes a piston ring, which is an elastic ring with an open structure. The piston ring is sleeved on the piston body. An annular groove is provided on the outer circumferential surface of the piston body. The piston ring is located in the annular groove. The annular groove limits the axial position of the piston ring. The piston ring has an outer circumferential surface, and the outer circumferential surface of the piston ring is used to fit with the inner wall of the air guide hoop.

2. The combined annular piston for a magazine-type shotgun according to claim 1, characterized in that: The inner surface of the piston is provided with an air-locking groove.

3. The combined annular piston for a magazine-type shotgun according to claim 1, characterized in that: The outer circumferential surface of the piston ring is provided with straight lines, and the straight lines are used for cleaning the inner wall of the gas guide ring.

4. The combined annular piston for a magazine-type shotgun according to claim 1, characterized in that: One end of the piston body corresponding to the piston ring is provided with four clearance grooves, and the clearance grooves are used for disassembling and assembling the piston ring.

5. The combined annular piston for a magazine-type shotgun according to claim 1, characterized in that: One end of the piston body corresponding to the piston ring is provided with a guiding inclined surface, and the guiding inclined surface is used for installing the piston ring.

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