阅读说明：本技术 一种可以改变制退效率的半开腔式制退器 (Half-open-cavity brake capable of changing brake efficiency ) 是由 赫雷 张翔宇 周克栋 陆野 刘强 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种可以改变制退效率的半开腔式制退器,包括连接座、上板、推杆、中板、叶片、下板、丝杆驱动机构；连接座设置在中板与下板之间；上板、中板、座块、下板依次连接,上板与中板之间设有推杆滑动的间隙；中板与下板上均设有多组曲线组,多组曲线组每两组左右成对设置；中板与下板之间设有对个叶片,每两个叶片成对设置；叶片上下端从内向外依次均设有第一限位柱、转轴、第二限位柱,分别对应中板与下板上之间的曲线组；两个叶片的半圆缺口构成制退器的中央孔道；上板上端设有丝杆驱动机构,所述丝杆驱动机构与推杆连接,用于带动叶片绕转轴转动；本发明可改变枪械发射时火药燃气产生制退力,从而改变制退效率。(The invention discloses a half-open-cavity brake capable of changing brake efficiency, which comprises a connecting seat, an upper plate, a push rod, a middle plate, blades, a lower plate and a screw rod driving mechanism, wherein the connecting seat is arranged on the upper plate; the connecting seat is arranged between the middle plate and the lower plate; the upper plate, the middle plate, the seat block and the lower plate are sequentially connected, and a gap for the push rod to slide is formed between the upper plate and the middle plate; a plurality of groups of curve groups are arranged on the middle plate and the lower plate, and each two groups of the curve groups are arranged in pairs; a pair of blades is arranged between the middle plate and the lower plate, and every two blades are arranged in pairs; the upper end and the lower end of the blade are sequentially provided with a first limiting column, a rotating shaft and a second limiting column from inside to outside, and the first limiting column, the rotating shaft and the second limiting column respectively correspond to a curve group between the middle plate and the lower plate; the semicircular gaps of the two blades form a central pore channel of the brake; the upper end of the upper plate is provided with a screw rod driving mechanism, and the screw rod driving mechanism is connected with the push rod and is used for driving the blades to rotate around the rotating shaft; the invention can change the stopping force generated by gunpowder gas when the firearms are launched, thereby changing the stopping efficiency.)

1. A half-open-cavity brake capable of changing brake efficiency is characterized by comprising a connecting seat, an upper plate, a push rod, a middle plate, blades, a lower plate and a screw rod driving mechanism;

the connecting seat comprises a connecting head and a seat block which are coaxially connected; the connector is used for being connected with a muzzle; the middle of the seat block is provided with a bullet through hole and is arranged between the middle plate and the lower plate; the upper plate, the middle plate, the seat block and the lower plate are sequentially connected, and a gap for sliding the push rod is formed between the upper plate and the middle plate;

a plurality of groups of curve groups are arranged on the middle plate and the lower plate, and each two groups of the curve groups are arranged in pairs; each group of curve groups comprises a rotating hole positioned in the middle, a first circumferential groove positioned on the inner side of the rotating hole and a second circumferential groove positioned on the outer side of the rotating hole; a pair of blades is arranged between the middle plate and the lower plate, and every two blades are arranged in pairs; the upper end and the lower end of the blade are sequentially provided with a first limiting column, a rotating shaft and a second limiting column from inside to outside, and the first limiting column, the rotating shaft and the second limiting column respectively correspond to a circumferential groove and a rotating hole between the middle plate and the lower plate; the inner sides of the blades are provided with semicircular notches, and the semicircular notches of the two blades form a central pore passage of the brake;

the upper end of the upper plate is provided with a screw rod driving mechanism, the screw rod driving mechanism is connected with a push rod and used for driving the push rod to slide along the axial direction of the gun barrel, and the push rod is hinged with a second limiting column at the upper end of the blade and used for driving the blade to rotate around a rotating shaft; to vary the central orifice of the damper between the pair of vanes.

2. The semi-open cavity brake actuator of claim 1, wherein said push rod comprises a lower plate and a slide block secured to an upper end of the lower plate; the lower bottom plate is arranged between the middle plate and the upper plate and can slide back and forth between the middle plate and the upper plate; the middle of the upper plate is provided with a sliding groove, the sliding block is in clearance fit with the sliding groove and can slide back and forth in the sliding groove, and the sliding direction is parallel to the axial direction of the connector.

3. The half-open damper according to claim 2, wherein the upper end of the slider is provided with a threaded hole for engaging with a lead screw supported on the upper plate through the connecting base, the lead screw being axially parallel to the axial direction of the connecting head.

4. The semi-open cavity brake according to claim 2, wherein said lower base plate is provided with six sets of rectangular grooves, which are symmetrically distributed in left and right three sets and respectively fit with the first limit posts on the upper sides of the six blades.

5. The half-cavity brake according to claim 2, wherein the lower plate is provided with six rotation holes, which are rotatably connected to the first limit posts on the upper sides of the six blades, respectively.

6. The half-open damper according to claim 1, wherein a plurality of spacers are disposed between said upper plate and said middle plate to form a gap therebetween.

7. The semi-open damper of claim 1, wherein said upper plate, middle plate, seat block, and lower plate are riveted together by rivets.

8. The semi-open damper of claim 1 wherein said upper, middle and lower plates are chamfered at each of their four corners.

Technical Field

The invention belongs to the field of automatic weapon structure design, and particularly relates to a semi-open cavity type brake capable of changing brake efficiency.

Background

In the history of firearm development, recoil is a still-unbounded topic, and the first automatic weapon in the world, namely a Makexin machine gun, is invented by a Makexin machine gun which is a father of an automatic weapon and utilizes recoil generated when the firearm shoots, and more people focus on reducing recoil generated when the firearm shoots in more than one hundred years. In recent years, students pay more attention to the cooperation of various buffer mechanisms, such as land, Zhou Ke, Herei, Li drastically pine, yellow snow hawk, the influence of the efficiency of the muzzle brake on a novel large-diameter machine gun based on the full-gun floating principle is researched [ J ]. war institute, 2016,37(09): 1585-; the impact of matching of the muzzle brake and the buffer on recoil force [ J ] ballistics proceedings, 2017,29(04):86-92. the impact of matching of the muzzle brake and the buffer on recoil force reduction is studied. They all have reached a similar conclusion that there is an optimum configuration when the bore damper is used in conjunction with other recoil reducing devices, i.e. the optimum effect can only be achieved with the cooperation of various recoil reducing devices when the bore damper retraction efficiency is taken to a value within a certain specific range.

After the conventional rifling damper is produced, all structural parameters are fixed, the braking efficiency is also fixed, the dynamic characteristics of the firearm automatic machine are necessarily influenced by the use environment (such as sand blown by wind, muddy water and the like), and when the dynamic characteristics of the automatic machine are forced to change by the use environment, if the braking efficiency of the rifling damper is not changed along with the change, the dynamic characteristics of the automatic machine are likely to be forced to develop towards a worse direction.

Disclosure of Invention

The invention aims to provide a semi-open-cavity brake capable of changing braking efficiency so as to change the braking force generated by gunpowder gas when a firearm is fired and further change the braking efficiency.

The technical solution for realizing the purpose of the invention is as follows:

a half-open-cavity brake capable of changing brake efficiency comprises a connecting seat, an upper plate, a push rod, a middle plate, blades, a lower plate and a screw rod driving mechanism;

the connecting seat comprises a connecting head and a seat block which are coaxially connected; the connector is used for being connected with a muzzle; the middle of the seat block is provided with a bullet through hole and is arranged between the middle plate and the lower plate; the upper plate, the middle plate, the seat block and the lower plate are sequentially connected, and a gap for sliding the push rod is formed between the upper plate and the middle plate;

a plurality of groups of curve groups are arranged on the middle plate and the lower plate, and each two groups of the curve groups are arranged in pairs; each group of curve groups comprises a rotating hole positioned in the middle, a first circumferential groove positioned on the inner side of the rotating hole and a second circumferential groove positioned on the outer side of the rotating hole; a pair of blades is arranged between the middle plate and the lower plate, and every two blades are arranged in pairs; the upper end and the lower end of the blade are sequentially provided with a first limiting column, a rotating shaft and a second limiting column from inside to outside, and the first limiting column, the rotating shaft and the second limiting column respectively correspond to a circumferential groove and a rotating hole between the middle plate and the lower plate; the inner sides of the blades are provided with semicircular notches, and the semicircular notches of the two blades form a central pore passage of the brake;

the upper end of the upper plate is provided with a screw rod driving mechanism, the screw rod driving mechanism is connected with a push rod and used for driving the push rod to slide along the axial direction of the gun barrel, and the push rod is hinged with a second limiting column at the upper end of the blade and used for driving the blade to rotate around a rotating shaft; to vary the central orifice of the damper between the pair of vanes.

Compared with the prior art, the invention has the following remarkable advantages:

(1) the opening of the central pore passage formed by the semicircular notches 8a of the two blades 8 in the same group is changed, so that the angle of the edge pore passage of the rifling brake is changed in the process, the included angle between the edge pore passage and the gun barrel determines the direction of the flushing of gunpowder gas, the direction of the gas flow reverse thrust of each edge pore passage is determined, and the braking force generated by the gunpowder gas when the firearms are fired is changed.

(2) All the blades are linked through the push rod, so that the angles of all the side pore passages are kept consistent, and the stopping force is ensured to be always along the axial direction of the gun barrel.

(3) The blades are positioned through the reverse locking effect of the screw rod, and the reliability of the blades in the use process is guaranteed.

Drawings

FIG. 1 is a drawing of a brake assembly.

Fig. 2 is an exploded view of the damper.

Fig. 3 is a structure view of the middle and lower plates.

FIG. 4 is a schematic view of a blade attachment.

Fig. 5 is a drawing of a push rod part.

FIG. 6 is a drawing of the push rod, vane assembly and interaction.

Fig. 7 is a top plate detail view.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

The half-cavity type brake capable of changing the braking efficiency in the embodiment comprises a connecting seat 1, rivets 2, an upper plate 3, a screw rod 4, a push rod 5, a front gasket 6, a middle plate 7, blades 8, a lower plate 9 and a rear gasket 10.

Connecting seat 1 is formed by connector 1a and seat piece 1b welding, and connector 1a is a pipe, is equipped with the internal thread, links to each other with the external screw thread of muzzle, through threaded connection, connects this brake at the muzzle. The upper plate 3, the gaskets (comprising two front gaskets 6 and two rear gaskets 10), the middle plate 7, the seat block 1b and the lower plate 9 are riveted together through 6 rivets 2 in sequence. The seat block 1b is clamped between the middle plate 7 and the lower plate 9, and a through hole coaxial with the connector 1a is formed in the middle of the seat block 1b and is a bullet through hole. Six groups of blades 8 are connected between the middle plate 7 and the lower plate 9.

The upper plate 3 is a rectangular steel plate with four corners containing chamfers. The structure of medium plate 7 is the same with hypoplastron 9 completely, and the main part is the rectangle steel sheet that four corners contains the chamfer, and except that there are six riveting holes 7a at four angular position fretworks of steel sheet, in the inside fretwork six groups of curve groups of face, for the activity restriction groove and the rotation hole of blade 8, six groups of curve groups are controlled and are set up in pairs about every two sets of. Each group of curve groups consists of two circumferential grooves 7b and 7d and a rotating hole 7c for rotating the blade 8, the two circumferential grooves 7b and 7d are the same circumference, and the rotating hole 7c is arranged at the circle center of the two circumferential grooves 7b and 7 d. Six groups of curve groups are correspondingly provided with six blades 8, and each group of blades 8 is arranged in pairs. The blades 8 are made to be circumferentially rotatable around the rotation hole 7c by the rotation hole 7c and the two circumferential grooves 7b, 7 d; six blades 8 are the same in structure, blade 8 is a vertical rectangular plate that contains semicircle breach 8a, and semicircle breach 8a sets up at blade 8 inboardly, and semicircle breach 8a is half of brake ware central pore, and the semicircle breach 8a group of two blades 8 constitutes a whole brake ware central pore.

The upper bottom surface and the lower bottom surface of the blade 8 are respectively welded with 3 cylinders (six cylinders in total), the cylinders corresponding to the upper bottom surface and the lower bottom surface are coaxial, a first limiting column 8b, a rotating shaft 8c and a second limiting column 8d are arranged from inside to outside in sequence, and the first limiting column 8b, the rotating shaft 8c and the second limiting column 8d on the upper side are arranged in a first circumferential groove 7b, a rotating hole 7c and a second circumferential groove 7d of the middle plate 7 respectively; the first limiting column 8b, the rotating shaft 8c and the second limiting column 8d on the lower side are respectively arranged in the first circumferential groove 7b, the rotating hole 7c and the second circumferential groove 7d of the lower plate 9. Wherein the height of the first position-limiting column 8b at the upper side of the blade 8 is larger than that of the other five cylinders, so that only the first position-limiting column 8b at the upper side of the blade 8 can be higher than the upper plane of the middle plate 7, namely, extend out of the first circumferential groove 7b of the middle plate 7 after the lower plate 9, the blade 8 and the middle plate 7 are combined in the order of the middle and the upper. Hypoplastron 9, blade 8, the connected mode of median plate 7 has guaranteed that blade 8 can revolve around axis of rotation 8c axial, and median plate 7, the circumferencial slot 7b on the hypoplastron 9, 7d have restricted blade 8's gyration scope, because connecting seat 1 fills up between median plate 7 and hypoplastron 9, as long as let the thickness of seat piece 1b slightly be greater than the height of blade 8 rectangular sheet main part, upper plate 3, median plate 7, hypoplastron 9 are riveted by rivet 2 after, blade 8 can not be blocked and can not rotate by median plate 7 and hypoplastron 9.

The push rod 5 is composed of a lower bottom plate 5d and a slider 5c welded at the upper end of the lower bottom plate 5b, 6 groups of rectangular grooves 5b are arranged on the lower bottom plate 5d, are symmetrically distributed according to 3 groups of left and right sides and are respectively matched with first limiting columns 8b on the upper sides of six blades 8, a vertical plate is welded at one end, close to a gun muzzle (close to 1a), of each rectangular block 5c, a threaded hole 5a is formed in the vertical plate, and the threaded hole 5a is matched with a lead screw 4. Lower plate 5d arranges in between medium plate 7 and upper plate 3, can slide around between the two, guarantees that every rectangular channel 5b on push rod 5 all blocks the first spacing post 8b of a blade 8 upside, places preceding gasket 6 and back gasket 10 on four angles of medium plate 7 upper surface, guarantees to go up upper plate 3 back on gasket 6, 10, has the clearance between lower plate 5d upper surface and the upper plate 3 of push rod 5, and upper plate 3 does not influence the motion of push rod 5 promptly.

In some embodiments, six rotation holes may be provided on the lower bottom plate 5d, and are respectively connected with the first limiting posts 8b on the upper sides of the six blades 8 in a rotation manner, so as to realize the axial rotation of the blades 8 around the rotation shaft 8 c.

The middle of the upper plate 3 is provided with a sliding groove 3b, the position of the sliding groove can just pass through a sliding block 5c on the push rod 5, the sliding block 5c is in clearance fit with the sliding groove 3b, the length of the sliding groove 3b is larger than that of the sliding block 5c, so that the sliding block 5c can slide back and forth in the sliding groove 3b, and the sliding direction is parallel to the axial direction of the connector 1 a. On 3 upper surfaces of upper plate, both ends around the rectangular through groove 3b weld "L" shape iron 3d respectively, and two "L" shape irons 3d are back to back each other, and it all punches through-hole 3c on the opposite face, and the coaxial isodiametric of through-hole on two "L" irons 3d is as the connecting seat of lead screw 4. Referring to fig. 1, the axial direction of the screw rod 4 is parallel to the axial direction of the connector 1a, the screw rod 4 simultaneously penetrates through the through hole 3c and the threaded hole 5a on the push rod 5, the axial direction is limited by the end cover, the screw rod 4 can only rotate relative to the L-shaped iron and cannot axially translate along the screw rod 4, and the push rod 5 translates along the groove 3b by rotating the screw rod 4.

The working process of the mechanism is as follows: the lead screw 4 is rotated, the lead screw 4 drives the push rod 5 to translate, the push rod 5 drives the blades 8 to rotate around the rotating shaft 8c of the blades 8, so that the included angle between the blades 8 and the axis of a gun barrel (namely the axis 1a) is changed, because the 6 blades 8 rotate at the same time by the same angle, a central pore passage formed by semicircular notches 8a of the two blades 8 in the same group changes an opening, the process changes the angle of a side pore passage (a passage between the two blades 8) of the muzzle brake, the included angle between the side pore passage and the gun barrel determines the direction of the gas rushing out of gunpowder, so that the direction of the gas flow reverse thrust of each side pore passage is determined (the side pore passages are symmetrically distributed left and right, the resultant force of the gas flow rushed out of each group of symmetrically distributed side pore passages is axially forwards along the gun barrel, the resultant force of the gas flow reverse force of all the side pore passages is braking force, the braking, the angle of the side pore channel is changed, the magnitude of the braking force can be changed, the braking force generated by gunpowder gas when the firearms are launched is changed, and for the same type of firearms and the configured braking devices, the braking force when the firearms are launched is changed, namely the braking efficiency of the braking devices is changed. Meanwhile, when the blade 8 is at the required angle, the screw 4 stops rotating, the blade 8 is fixed at the position through self-locking of the screw 4, the blade 8 is locked by applying the screw self-locking principle, and the structure is reliable. All the blades are linked through the push rod, so that the angles of all the side pore passages are kept consistent, and the stopping force is ensured to be always along the axial direction of the gun barrel.