阅读说明：本技术 一种栓动式狙击步枪枪机进出导引机构 (Bolt type sniper rifle bolt in-and-out guiding mechanism ) 是由 李茂林 周峰 周晗 艾川 刘科言 王敏祥 于 2019-10-21 设计创作，主要内容包括：本发明公开了一种栓动式狙击步枪枪机进出导引机构,包括机匣和枪机,机匣沿轴向设有通孔a,枪机可在机匣的通孔a中前后移动和周向转动,机匣尾部沿竖向设有通孔b,通孔b与通孔a连通,通孔b内固定有滚轮轴,滚轮轴的下端可转动的配合有限位滚轮,用于对枪机在机匣内的运动提供导引,枪机外表面设有导引槽,导引槽由枪机前端至后端依次分为A、B、C、D四段,当枪机在机匣内运动时,所述限位滚轮置于枪机的导引槽内,使枪机顺着导引槽在限位滚轮导引下在机匣内灵活运动。本发明的导引机构结构简单,各零部件运动灵活,限位可靠,完全满足使用要求。(The invention discloses a bolt type sniper rifle bolt in-and-out guiding mechanism, which comprises a receiver and a bolt, wherein the receiver is axially provided with a through hole a, the bolt can move back and forth and rotate circumferentially in the through hole a of the receiver, the tail part of the receiver is vertically provided with a through hole b, the through hole b is communicated with the through hole a, a roller shaft is fixed in the through hole b, the lower end of the roller shaft is rotatably matched with a limiting roller for guiding the movement of the bolt in the receiver, the outer surface of the bolt is provided with a guiding groove, the guiding groove is sequentially divided into A, B, C, D four sections from the front end to the rear end of the bolt, and when the bolt moves in the receiver, the limiting roller is arranged in the guiding groove of the bolt, so that the bolt can flexibly move in the receiver under the guidance of the limiting roller along the guiding groove. The guide mechanism has the advantages of simple structure, flexible movement of parts, reliable limit and capability of completely meeting the use requirement.)

1. The bolt type sniper rifle bolt in-and-out guiding mechanism comprises a receiver and a bolt, wherein the receiver is provided with a through hole a along the axial direction, and the bolt can move back and forth and rotate circumferentially in the through hole a of the receiver, and is characterized in that: the gun receiver comprises a receiver, a through hole b, a limiting roller, a guiding groove and a limiting roller, wherein the receiver is arranged at the tail of the receiver, the through hole b is vertically communicated with the through hole a, a roller shaft is fixed in the through hole b, the lower end of the roller shaft is rotatably matched with the limiting roller and used for guiding the movement of a gun in the receiver, the outer surface of the gun is provided with the guiding groove, the guiding groove is sequentially divided into A, B, C, D sections from the front end to the rear end of the gun, and when the gun moves in the receiver, the limiting roller is arranged in the guiding groove of the gun, so that the gun flexibly moves in the receiver under the guiding of the limiting roller along the guiding groove.

2. The bolt sniper rifle bolt entry and exit guide mechanism of claim 1, wherein: the segments A, C of the guide grooves are symmetrically arranged along the axial direction of the gunlock and relative to the axial line of the gunlock, so that an included angle alpha is formed between the segments A, C of the guide grooves, the segments B, D of the guide grooves are arranged perpendicular to the axial line of the gunlock, the segments A, C of the guide grooves are connected through the segments B of the guide grooves, the segments D of the guide grooves are connected with the segments C of the guide grooves, the tail ends of the segments D of the guide grooves form an included angle beta with the central line of the segments C of the guide grooves, and the width of the guide grooves is consistent with the outer diameter of.

3. A bolt-type sniper rifle bolt entry and exit guide as claimed in claim 1 or claim 2, wherein: the roller shaft comprises a large end and a small end, the large end is a circular boss and is matched with a guide groove of the gun bolt, the small end is a cylinder and is matched with a through hole b of the case, a counter bore is formed in the center of the small end, and the roller shaft is riveted and fixed with the case through the counter bore.

4. The bolt sniper rifle bolt entry and exit guide mechanism of claim 3, wherein: the limiting roller is provided with a step hole along the axial direction, the large hole is matched with the large end of the roller shaft, and the small hole is matched with the small end of the roller shaft, so that the limiting roller can rotate on the roller shaft and is limited by the large end of the roller shaft to prevent the limiting roller from falling out downwards.

5. The bolt sniper rifle bolt entry and exit guide mechanism of claim 2, wherein: the included angle alpha between the sections of the guide grooves A, C is 45-70 degrees, and the included angle beta formed by the tail end of the section D of the guide groove and the section C of the guide groove is 60-120 degrees.

6. A bolt-type sniper rifle bolt entry and exit guide as claimed in claim 1 or claim 2, wherein: the tail end of the bolt is also provided with a handle for pushing, pulling and rotating the bolt in and out of the receiver by hand.

Technical Field

The invention belongs to the technical field of firearms, and particularly relates to a bolt type sniper rifle bolt in-and-out guide mechanism.

Background

At present, the sniper rifles usually adopt a semi-automatic type and a bolt type, and particularly the bolt type is mainly used. The bolt type sniper rifle finishes complete mechanism actions such as bullet pushing, locking, firing, unlocking, gun retreating and shell ejection and the like by means of relative movement of a gun in a receiver, so that the movement flexibility of the bolt type gun rifle is related to the operation comfort and the rapid sensitivity of a shooter when a sniper task is finished, the bullet supply reliability at the moment is seriously influenced even, and the tendency of a war office is influenced. When the existing gun moves in the receiver, a guide rail groove is usually arranged on the gun body, a guide rail is arranged on the receiver, and the whole mechanism action of the gun is completed through the matching of the guide rail groove and the guide rail.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a bolt type sniper rifle bolt in-and-out guide mechanism.

The purpose of the invention is realized as follows:

the bolt type sniper rifle bolt in-and-out guiding mechanism comprises a receiver and a rifle bolt, wherein the receiver is axially provided with a through hole a, the rifle bolt can move back and forth and rotate circumferentially in the through hole a of the receiver, the tail of the receiver is vertically provided with a through hole b, the through hole b is communicated with the through hole a, a roller shaft is fixed in the through hole b, the lower end of the roller shaft is rotatably matched with a limiting roller to provide guidance for the movement of the rifle bolt in the receiver, the outer surface of the rifle bolt is provided with a guiding groove, the guiding groove is sequentially divided into A, B, C, D four sections from the front end to the rear end of the rifle bolt, and when the rifle bolt moves in the receiver, the limiting roller is arranged in the guiding groove of the rifle bolt to enable the rifle bolt to flexibly move in the receiver under the guidance of the limiting roller along the guiding groove.

Furthermore, the sections A, C of the guide grooves are symmetrically arranged along the axial direction of the bolt and relative to the axial line of the bolt, so that an included angle α is formed between the sections A, C of the guide grooves, the sections B, D of the guide grooves are arranged perpendicular to the axial line of the bolt, the sections A, C of the guide grooves are connected through the sections B of the guide grooves, the sections D of the guide grooves are connected with the sections C of the guide grooves, the tail ends of the sections D of the guide grooves form an included angle β with the central line of the sections C of the guide grooves, and the width of the guide grooves is consistent with the outer diameter of the limiting rollers.

Furthermore, the roller shaft comprises a large end and a small end, the large end is a circular boss and is matched with a guide groove of the gun bolt, the small end is a cylinder and is matched with the through hole b of the case, a counter bore is arranged at the center of the small end, and the roller shaft is riveted and fixed with the case through the counter bore.

Furthermore, the limiting idler wheel is provided with a step hole along the axial direction, the large hole is matched with the large end of the idler wheel shaft, and the small hole is matched with the small end of the idler wheel shaft, so that the limiting idler wheel can rotate on the idler wheel shaft, and the limiting idler wheel is prevented from falling out downwards through limiting of the large end of the idler wheel shaft.

Furthermore, the included angle alpha degree between the sections of the guide grooves A, C is 45-70 degrees, and the included angle beta degree formed by the tail end of the section D of each guide groove and the section C of each guide groove is 60-120 degrees.

Furthermore, the tail end of the bolt is also provided with a handle which is used for pushing, pulling and rotating the bolt in and out of the receiver in a handheld manner.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. the roller shaft is fixedly riveted on the receiver, the lower end of the roller shaft is in running fit with the limiting roller, the large end of the roller shaft can limit the limiting roller to prevent the limiting roller from falling out downwards, and when the gun bolt moves back and forth and rotates circumferentially in the receiver, the gun bolt is guided by the limiting roller.

2. The outer surface of the gun bolt is provided with a guide groove, when the gun bolt moves back and forth and rotates circumferentially in the receiver, the gun bolt can be pushed into the chamber to complete locking only by aligning the guide groove of the gun bolt with the limiting roller, the gun bolt is pushed forward and rotated by external force, and the gun bolt can be unlocked, ejected or retreated by pulling backwards, so that the gun bolt can move back and forth in the receiver to guide accurately, safely and reliably.

3. The mechanism has the advantages of simple structure, flexible movement of each part, reliable limit and capability of completely meeting the use requirements.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the construction of the bolt of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view of the step E-E of FIG. 2;

FIG. 5 is a view from direction F of FIG. 4;

FIG. 6 is a schematic structural view of the casing of the present invention;

FIG. 7 is a schematic view of the construction of the roller shaft of the present invention;

fig. 8 is a schematic structural view of the spacing roller of the present invention.

Reference numerals

In the attached drawings, 1 is a gun bolt, 2 is a receiver, 3 is a limiting roller, 4 is a roller shaft,

11 is a handle, 12 is a guide groove, 21 is a through hole b, 22 is a through hole a,

31 is a stepped hole, 41 is a small end of the roller shaft, 42 is a large end of the roller shaft, 43 is a counter bore,

A. b, C, D are four segments of guide groove

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1-8, a bolt-type sniper rifle bolt entry and exit guide, comprising a receiver 2 and a bolt 1, the receiver 2 is provided with a through hole a22 along the axial direction, the bolt 1 can move back and forth and rotate circumferentially in the through hole a22 of the receiver, the tail part of the machine case 2 is vertically provided with a through hole b21, the through hole b21 is communicated with the through hole a22, a roller shaft 4 is fixed in the through hole b21, the lower end of the roller shaft 4 is rotatably matched with a limit roller 3, for guiding the movement of the bolt 1 in the receiver 2, said bolt 1 being provided with a guide groove 12 on its outer surface, the guide groove 12 is sequentially divided into A, B, C, D four sections from the front end to the rear end of the bolt machine 1, when the bolt 1 moves in the receiver 2, the limiting roller 3 is arranged in the guide groove 12 of the bolt, so that the bolt 1 can flexibly move in the receiver along the guide groove 12 under the guidance of the limiting roller 3.

As shown in fig. 2 to 5, the segments A, C of the guide grooves are symmetrically arranged along the axial direction of the bolt and relative to the axial line of the bolt, so that an included angle α is formed between the segments A, C of the guide grooves, the segments B, D of the guide grooves are arranged perpendicular to the axial line of the bolt, the segments A, C of the guide grooves are connected by the segments B of the guide grooves, the segments D of the guide grooves are connected with the segments C of the guide grooves, the tail ends of the segments D of the guide grooves form an included angle β with the central line of the segments C of the guide grooves, in this embodiment, the included angle α ° between the segments A, C of the guide grooves is preferably 45 ° to 70 °, and the included angle β ° formed between the tail ends of the segments D.

In order to ensure the reliable matching of the limiting roller and the bolt machine guide groove, the width of the guide groove 12 is consistent with the outer diameter of the limiting roller.

As shown in fig. 7, the roller shaft 4 includes a large end 42 and a small end 41, the large end 42 is a circular boss and is matched with the guide groove 12 of the bolt, the small end 41 is a cylinder and is in interference fit with the through hole b21 of the receiver, a counter bore 43 is arranged at the center of the small end 41, and the roller shaft 4 is riveted and fixed with the receiver 2 through the counter bore 43.

As shown in fig. 8, the limiting roller 3 is provided with a step hole 31 along the axial direction, the large hole is matched with the large end 42 of the roller shaft, and the small hole is matched with the small end 41 of the roller shaft, so that the limiting roller 3 can flexibly rotate on the roller shaft 4, and the limiting roller 3 is prevented from falling out downwards through the limiting of the large end 42 of the roller shaft.

In order to facilitate the handheld push-pull and rotation of the bolt to enter and exit the receiver, the tail end of the bolt is also provided with a handle 11.

Pushing the bolt to enter a locking and unlocking process of a receiver:

locking: and (3) putting the gun into the through hole a in the receiver by holding the handle, aligning the section A of the guide groove on the gun with the limiting roller, then pushing the gun to the front end of the receiver, rotating the gun by an angle alpha clockwise when pushing the gun to the section B of the guide groove, enabling the limiting roller to enter the section C of the guide groove, continuously pushing the gun forward until the section D of the guide groove and rotating the gun by the angle beta clockwise again to complete locking.

Unlocking: the handheld machine handle rotates anticlockwise, the gunlock is guided by the limiting idler wheel to sequentially pass through the D section, the C section, the B section and the A section of the guide groove to be unlocked and withdrawn, the shell throwing or bullet withdrawing action is completed, and a reverse motion relation is formed between the shell throwing or bullet withdrawing action and the locking.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.