阅读说明：本技术 一种快换式拉壳钩轴限位保护结构 (Quick-change type pull-shell hook shaft limiting protection structure ) 是由 黄光富 朱开钰 黄�俊 刘科言 蔡崧 罗波 雷枫桥 王冲 叶云凯 宋维东 张渝 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种快换式拉壳钩轴限位保护结构,包括机框体、机头体、拉壳钩和安装在机头体上的拉壳钩轴,机框体的前端沿轴向设有凸笋,凸笋在枪机开锁状态时位于机头体闭锁齿正后方,用于压紧拉壳钩轴,拉壳钩轴包括杆部和头部,机头体的杆部前端沿轴向设有容纳槽,用于放置拉壳钩轴头部,防止拉壳钩轴头部扭转,容纳槽内沿径向开设有通孔,用于安装拉壳钩轴杆部,枪机在开锁/闭锁工作循环中,所述拉壳钩轴头部始终被机框体前端的凸笋底部挡住不窜出机头体。本发明结构可提高枪机的维修性能,便于拉壳钩轴的快速更换和拆卸清洗要求,且不占用机头外围尺寸,并且不增加枪械闭锁部位体积,有利于枪械减重量,提高机动性。(The invention discloses a quick-change type pull-shell hook shaft limiting protection structure which comprises a frame body, a machine head body, a pull-shell hook and a pull-shell hook shaft arranged on the machine head body, wherein a convex bamboo shoot is axially arranged at the front end of the frame body and is positioned right behind a locking tooth of the machine head body in a gun unlocking state for pressing the pull-shell hook shaft, the pull-shell hook shaft comprises a rod part and a head part, an accommodating groove is axially arranged at the front end of the rod part of the machine head body and is used for accommodating the head part of the pull-shell hook shaft to prevent the head part of the pull-shell hook shaft from being twisted, a through hole is radially arranged in the accommodating groove and is used for installing the pull-shell hook shaft rod part, and the head part of the pull-shell hook shaft is always blocked by the bottom of the convex bamboo shoot at the front end of the. The structure of the invention can improve the maintenance performance of the gun, is convenient for the quick replacement and disassembly and cleaning requirements of the pull-shell hook shaft, does not occupy the peripheral size of the machine head, does not increase the volume of the locking part of the gun, is beneficial to reducing the weight of the gun and improves the maneuverability.)

1. The utility model provides a quick change formula draws shell hook shaft spacing protection architecture, includes the frame body, cup joints the head body in the frame body, connects the draw shell hook in the head body draws shell hook groove and installs the draw shell hook shaft on the head body, its characterized in that: the front end of frame body is equipped with protruding bamboo shoot along the axial, protruding bamboo shoot is located the frame head body dead front side of locking tooth when the rifle bolt state of unblanking for compress tightly and draw the shell hook axle, draw the shell hook axle to include pole portion and head, the pole portion front end of frame head body is equipped with the holding tank along the axial for place and draw shell hook axle head, prevent to draw shell hook axle head to twist reverse, radially seted up the through-hole in the holding tank for installation draws shell hook axle pole portion, the rifle bolt is in unblanking/shutting duty cycle, draw shell hook axle head to be blocked by the protruding bamboo shoot bottom of frame body front end all the time and do not scurry out the frame head body.

2. The quick-change type pull-shell hook shaft limiting protection structure according to claim 1, characterized in that: the pull-shell hook shaft head part is of an asymmetric structure relative to the rod part, the long end of the pull-shell hook shaft head part is provided with a weight reduction inclined plane for reducing rotation inertia, and a chamfer angle for increasing strength is arranged between the pull-shell hook shaft head part and the rod part.

3. The quick-change type pull-shell hook shaft limiting protection structure according to claim 1, characterized in that: the pull shell hook shaft head part is of a symmetrical or asymmetrical structure relative to the rod part, and a chamfer angle for increasing strength is arranged between the pull shell hook shaft head part and the rod part.

4. The quick-change type zipper puller hook shaft limiting protection structure as claimed in claim 2 or 3, wherein: and a yielding groove is formed between the accommodating groove and the through hole of the rod part of the machine head body and is used for chamfering and yielding when the pull shell hook shaft is installed.

5. The quick-change type pull-shell hook shaft limiting protection structure according to claim 1, characterized in that: the section size of the convex bamboo shoot at the front end of the frame body along the longitudinal direction is smaller than the section size of the locking tooth of the frame body, so that the convex bamboo shoot does not interfere with the joint sleeve in the unlocking/locking process of the gun.

Technical Field

The invention relates to the technical field of firearms, in particular to a quick-change type pull-shell hook shaft limiting protection structure.

Background

The AR series rifles such as M16, M4 and the like in foreign countries all adopt a cylindrical shell-pulling hook shaft, the shell-pulling hook shaft is completely blocked by a machine frame body in an unlocking/locking working cycle to prevent the shell-pulling hook shaft from jumping out, the AR series rifles have the advantages of simple structure and good manufacturability, but the AR series rifles are only suitable for a structure with small unlocking/locking stroke, the small stroke of an opening and closing lock means that the spiral rising angle of the opening and closing lock is large and the free stroke after locking is small, the problem of large resistance of the opening and closing lock is caused by the large spiral rising angle of the opening and closing lock, the free stroke after locking can only be an elastic shell-throwing structure, the problem of poor reliability under the conditions of river water with silt and dust due to the fact that the shell-throwing spring has influence on the in-position rebounding of a gunlock is solved by the shell-throwing. Foreign AK series and domestic 56 dashes series, 81 formula step series, 95/95-1 formula class use rifle clan, all adopt the structure of locking the axle of drawing shell hook with solid or elasticity cylinder firing pin, its advantage is simple in construction, the manufacturability is good, but the aircraft nose structural dimension is great, leads to whole rifle structure big, the weight is heavy, and drawing shell hook axle has the risk that the reliability is influenced in the work of shifting out.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a quick-change type pull-shell hook shaft limiting protection structure, can improve the maintenance performance of a gun bolt, is convenient for the quick replacement and disassembly and cleaning requirements of the pull-shell hook shaft, does not occupy the peripheral size of a machine head, does not increase the volume of a locking part of the gun, is beneficial to reducing the weight of the gun and improves the maneuverability.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a quick-change formula draws shell hook shaft spacing protection architecture, includes the frame body, cup joints the frame body in the frame body, connects the draw shell hook in the frame body draws shell hook inslot and installs the draw shell hook shaft on the frame body, the front end of frame body is equipped with protruding bamboo shoot along the axial, protruding bamboo shoot is located the frame body locking tooth dead astern when the rifle bolt state of unblanking for compress tightly draw shell hook shaft, draw shell hook shaft includes pole portion and head, the pole portion front end of frame body is equipped with the holding tank along the axial for place draw shell hook shaft head, prevent that draw shell hook shaft head from twisting, radially seted up the through-hole in the holding tank for installation draws shell hook shaft pole portion, the rifle bolt is in unblanking/shutting duty cycle, draw shell hook shaft head is blocked the not scurrying out of frame body by the protruding bamboo shoot bottom of frame body front end all the time.

Preferably, the head part of the pull-shell hook shaft is of a symmetrical or asymmetrical structure relative to the rod part, a weight-reducing inclined plane is arranged at the long end of the asymmetrical structure and used for reducing the rotation inertia, and a chamfer used for increasing the strength is arranged between the head part of the pull-shell hook shaft and the rod part.

Preferably, the shaft head part of the pull-shell hook is in a symmetrical or asymmetrical structure relative to the rod part, and a fillet for increasing strength is arranged between the shaft head part of the pull-shell hook and the rod part.

Preferably, a yielding groove is formed between the accommodating groove and the through hole in the rod part of the machine head body and used for chamfering and yielding when the pull case hook shaft is installed.

Preferably, the section size of the convex bamboo shoot at the front end of the bolt frame body along the longitudinal direction is smaller than the section size of the locking tooth of the bolt head body, so that the convex bamboo shoot does not interfere with the joint sleeve in the unlocking/locking process of the bolt.

The invention has the beneficial effects that:

1. the pull-shell hook shaft is designed into the rod part and the head part which are integrally formed, the accommodating groove and the through hole are formed in the machine head body, the head part of the pull-shell hook shaft is placed in the accommodating groove and is limited in the axial direction of the pull-shell hook shaft, the head part is prevented from being twisted, the convex bamboo shoots are arranged at the front end of the machine frame body, and the bottom of the convex bamboo shoots of the machine frame body always blocks the head part of the pull-shell hook shaft in an unlocking/locking working cycle of the gun machine, so that the pull-shell hook shaft is prevented from jumping out of the machine head body and colliding with the.

2. The locking mechanism can be used in a gun bolt structure with small size and light weight, and can also be used in a gun bolt with a rigid shell-throwing structure, wherein the stroke of an opening-closing lock is large, and the free stroke after locking is large;

3. the pull-shell hook shaft and the machine head body are in clearance fit, the maintainability is good, and the quick replacement, the disassembly and the cleaning of the pull-shell hook shaft are convenient.

4. The man-machine efficiency is good, the peripheral size of the machine head body is not occupied, the size of the locking part of the firearm is not increased, the weight of the firearm is reduced, and the maneuverability is improved.

5. The structure is simple, the shell-pulling hook is suitable for being widely adopted in similar weapons with the shell-pulling hook arranged between the two locking teeth, and the portability is good.

Drawings

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

FIG. 2 is a top view of the unlocking mechanism of the present invention;

FIG. 3 is a schematic view of the latch of the present invention;

FIG. 4 is a schematic structural diagram of a frame body;

FIG. 5 is a schematic structural diagram of a machine head body;

FIG. 6 is a front view of the drawer hook shaft;

FIG. 7 is a top view of the drawer hook shaft;

fig. 8 is a left side view of the drawer hook shaft.

Reference numerals

1. A frame body; 2. a machine head body; 3. pulling a shell hook; 4. a pull-shell hook shaft;

101. convex bamboo shoots; 201. accommodating grooves; 202. a yielding groove; 203. a through hole;

401. the head part of the pull shell hook shaft; 402. a weight reduction slope; 403. a chamfer between the stem and the head; 404. the shaft part of the pull-shell hook.

Detailed Description

The working principle and structure of the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1 to 8, a quick-change type slip hook shaft limiting protection structure for a certain type of firearm includes a frame body 1, a machine head body 2 sleeved in the frame body 1, a slip hook 3 connected in a slip hook groove of the machine head body 2, and a slip hook shaft 4 installed on the machine head body 2, wherein a protruding bamboo shoot 101 is axially disposed at a front end of the frame body 1, the protruding bamboo shoot 101 is located right behind a locking tooth of the machine head body in an unlocking state of the firearm and is used for pressing the slip hook shaft 4, the slip hook shaft 4 includes a rod portion 404 and a head portion 401, an accommodating groove 201 is axially disposed at a front end of the rod portion of the machine head body and is used for placing a slip hook shaft head portion 401 to prevent the slip hook shaft head portion 401 from twisting, a through hole 203 is radially disposed in the accommodating groove 201 and is used for installing the slip hook shaft 404,

as shown in fig. 6 to 8, in this embodiment, the pull-shell hook shaft head portion 401 has an asymmetric T-shaped structure with respect to the rod portion 404, the long end is provided with a weight-reducing inclined surface 402 for reducing the rotational inertia, and an arc-shaped chamfer is provided between the pull-shell hook shaft head portion 401 and the rod portion 404 for increasing the connection strength between the pull-shell hook shaft rod portion 404 and the head portion 401.

In this embodiment, a relief groove 202 is provided between the accommodating groove 201 of the head body rod portion and the through hole 203, and is used for relieving the arc-shaped chamfer during the installation of the clamshell hook shaft, so as to ensure that the clamshell hook shaft rod portion 404 and the arc-shaped chamfer 403 of the head portion 401 do not interfere with the accommodating groove 201 of the head body 2.

In this embodiment, the section size of the protruding bamboo shoot 101 at the front end of the machine frame body along the longitudinal direction is smaller than the section size of the locking tooth of the machine frame body, so that the protruding bamboo shoot does not interfere with the section sleeve in the unlocking/locking process of the bolt.

After the bolt machine is arranged in the accommodating groove and the through hole of the machine head body arranged on the pull-shell hook shaft in the embodiment, the head part of the pull-shell hook shaft is always blocked by the bottom of the convex bamboo shoot at the front end of the machine frame body in the unlocking/locking working cycle of the bolt machine, so that the condition that the pull-shell hook shaft does not move out of the machine head body to collide with the machine frame body and the end face of the mounting hole of the machine head body is ensured, and the safety in the working cycle of the bolt machine is ensured.

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.