Elimination of wedge structure for light weapons

Abstract

The application discloses a light weapon elimination wedge structure, which comprises a joint sleeve, a bolt and a bolt frame. The bolt is coaxially matched with the bolt hole of the bolt frame, and the longitudinal section of the bolt frame is rectangular. A rotation limiting check iron displacement slot is arranged on the bolt frame, the rotation limiting check iron displacement slot is provided with a rotation limiting check iron, the rotation limiting check iron can rotate relative to the bolt frame, and an elastic reset mechanism is arranged in the bolt frame, which can apply an elastic force to the rotation limiting check iron, so that the rotation limiting check iron abuts against a guide column, and the guide column cannot move axially relative to the bolt frame. The guide column is inserted into the bolt, and a firing pin penetrates through the guide column and the bolt frame. The side end of the bolt frame is provided with a curved slot, and the guide column is located in the curved slot. When the bolt enters the joint sleeve, the joint sleeve can be matched with the rotation limiting check iron, so that the rotation limiting check iron rotates against the elastic force and is separated from the guide column, and the guide column can move in the curved slot to drive the bolt to rotate and complete the locking. The designed rotation limiting check iron mechanism can improve the reliability of the firearm.

Description

Technical Field

[0001] This invention pertains to firearms technology involving rotating bolt locking, specifically a mechanical structure for eliminating the wedging between the bolt and receiver during rotating bolt locking, and particularly a structure for eliminating wedging in a lightweight weapon. Background Technology

[0002] Firearms that use a bolt-locking mechanism and allow relative movement between the bolt and bolt carrier typically employ a guide rail on the receiver to constrain the bolt's movement, for example, during feeding. The reaction force of the bolt on the receiver is a wedging force, which increases the resistance to the movement of the bolt assembly within the receiver, reducing the reliability of the mechanism.

[0003] Reducing and eliminating wedging is a common method to improve firearm reliability. Some firearms manufacture the bolt guide rail, which constrains the bolt movement, as a separate part, improving its manufacturing precision and significantly reducing surface roughness to lower the coefficient of friction between it and the bolt, thereby reducing the wedging force. Other firearms use bolt carriers with planar curved grooves. After unlocking, the bolt is held in place by the plane on the curved groove, keeping the bolt and bolt carrier stationary. The guide post is designed as a polygon to mate with the plane on the curved groove. In recent years, some firearms have incorporated a swivel block to maintain the relative stationary position of the bolt carrier and bolt, eliminating wedging. This structure only appears on cylindrical or semi-cylindrical bolt carriers, where the curved groove mates with the bolt guide post on the arc surface of the bolt carrier.

[0004] The use of a rectangular bolt carrier is a trend in the development of light weapons. Rectangular bolt carriers are easier to manufacture than cylindrical or semi-cylindrical bolt carriers, and the corresponding receivers are also easier to produce. However, firearms using rectangular bolt carriers have not yet eliminated the wedge-tight structure. Summary of the Invention

[0005] The purpose of this invention is to provide a structure for eliminating wedge tightness in lightweight weapons, applicable to rectangular bolt carriers of lightweight weapons to eliminate wedge tightness between the bolt and receiver, thereby improving the reliability of firearms.

[0006] The technical solution to achieve the purpose of this invention is as follows:

[0007] A lightweight weapon has a wedge-tightening structure, comprising a sleeve, a bolt, and a bolt carrier; the bolt and bolt carrier have a bolt hole that is coaxially fitted, and the bolt carrier has a rectangular longitudinal section;

[0008] The bolt carrier is provided with a rotation locking lug groove, and the rotation locking lug groove is provided with a rotation locking lug. The rotation locking lug can rotate relative to the bolt carrier, and the bolt carrier is provided with an elastic reset mechanism, which can apply an elastic force to the rotation locking lug, so that the rotation locking lug abuts against the guide post, and the guide post cannot move axially relative to the bolt carrier.

[0009] The guide post is inserted into the bolt, and the firing pin passes through the guide post and the bolt carrier;

[0010] The bolt carrier has a curved groove on its side end, and the guide post is located inside the curved groove.

[0011] When the bolt enters the sleeve, the sleeve can cooperate with the slewing block, causing the slewing block to overcome the elastic force and rotate and separate from the guide post, so that it can move in the curved groove and drive the bolt to rotate to complete the locking.

[0012] The significant advantages of this invention compared to existing technologies are:

[0013] During feeding and ejection, the bolt is relatively stationary with respect to the bolt carrier, transferring the resistance acting on the bolt to the entire bolt assembly. This prevents the receiver rail from wedging into the bolt, improving the reliability of the firearm. In addition, the rectangular bolt carrier makes it easy to manufacture and suitable for light weapons. Attached Figure Description

[0014] Figure 1 Overall diagram of eliminating the wedge-tightening structure for light weapons.

[0015] Figure 2 This is a schematic diagram showing the engagement between the locking block and the locking block spring head inside the bolt carrier.

[0016] Figure 3 This is a schematic diagram showing the connection between the guide post, firing pin, and bolt.

[0017] Figure 4 This is a schematic diagram showing the connection between the sleeve and the control plate.

[0018] Figure 5 This is a schematic diagram showing the interaction between the rotating clamp and the guide post.

[0019] Figure 6 This is a schematic diagram showing the fit between the top of the swivel iron and the protruding inclined surface of the end face of the sleeve.

[0020] Figure 7 The bolt locking is complete when the bolt carrier is fully pressed down by the tail end of the sleeve. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] This embodiment provides a lightweight weapon wedge-eliminating structure, such as... Figures 1-7As shown, the assembly includes a sleeve 1, a bolt carrier 4, a bolt 2, a locking lug 3, a locking lug screw pin 7, a locking lug spring head 8, a locking lug spring 9, a guide post 6, and a firing pin 5. The bolt 2 is coaxially fitted with the bolt hole of the bolt carrier 4. One side of the bolt carrier 4 has a curved groove 401, through which the guide post 6 passes and inserts into the guide post hole 202 on the bolt 2. The firing pin hole 603 on the guide post 6 is coaxial with the firing pin hole 201 inside the bolt 2, and the firing pin 5 passes through these two firing pin holes in sequence. Above and in front of the curved groove 401 of the bolt carrier is a locking lug relief groove 402, in which the locking lug 3 rotates around the locking lug screw pin 7. The locking lug screw pin 7 passes through the locking lug 3 and is fixed to the bolt carrier 4 by threads. The rotating catch spring 9 and the rotating catch spring top 8 are located in the rotating catch spring hole 403 of the bolt carrier. One end of the rotating catch spring top 8 abuts against the rotating catch 3, and the other end is inserted into the rotating catch spring 9. When the bolt 2 is in the unlocked state, the guide post 6 is located at the foremost position of the curved groove 401 of the bolt carrier. Under the force of the rotating catch spring 9, the rotating catch 3 abuts against the upper surface 602 of the guide post 6. The direction of movement of the guide post 6 relative to the bolt carrier 4 is perpendicular to the rotating surface of the rotating catch. The guide post 6 is restricted by the rotating catch 3 and cannot move relative to the bolt carrier 4. After the guide post 6 is restricted from relative movement by the rotating catch 3, the guide post 6 and the bolt 2 are coaxially engaged through the guide post mounting hole 202, and also coaxially engaged through the two firing pin holes 201 and 603. The axes of the two coaxial engagements are perpendicular to each other. The bolt 2 and the guide post 6 are relatively fixed, meaning the bolt 2 is also restricted by the rotating catch 3 and does not move relative to the bolt carrier 4. This allows the bolt 2 to complete the subsequent extraction and feeding functions. During extraction and feeding, the bolt 2 needs to remain relatively stationary with the bolt carrier 4. When the bolt 2 locks with the sleeve 1, the bolt 2 enters the stationary sleeve 1 and rotates a certain angle. To allow the bolt 2 to rotate, the guide post 6 moves along the curved groove 401 on the side of the bolt carrier. Because the guide post 6 and the bolt 2 are coaxially engaged through the guide post mounting hole 202, and also coaxially engaged through the two firing pin holes 201 and 603, the guide post 6 drives the bolt 2 to move. When the bolt 2 moves outside the sleeve 1, the rotating block 3 restricts the movement of the bolt 2, keeping it stationary with the bolt carrier 4. When the bolt 2 enters the sleeve 1, the protruding inclined surface 101 connected to the tail end face of the sleeve presses against the top of the rotating block 301, causing the rotating block 3 to rotate against the spring force. When the rotating block 3 rotates to a sufficient angle, the guide post 6 is no longer restricted by the rotating block 3, and the guide post 6 moves along the curved groove 401, and the bolt 2 rotates to complete the locking.

[0023] like Figure 3 , Figure 4 As shown, the top end 301 of the control bracket engages with the protruding inclined surface 101 connected to the tail end face of the sleeve.

[0024] like Figure 5As shown, the lower end 302 of the control bracket presses against the upper end 602 of the guide post, and the cross-section 601 of the guide post is blocked by the control bracket 3. The control bracket 3 restricts the movement of the guide post 6 in the curved groove 401.

[0025] like Figure 1 As shown, when the locking block 3 presses against the guide post 6, the bolt 2 is in the unlocked state.

[0026] like Figure 6 As shown, the top of the rotating block 301 is pressed against the protruding inclined surface 101 of the end face of the sleeve, and the rotating block 3 rotates relative to the bolt carrier 4 during the axial movement of the rotating block 3.

[0027] like Figure 7 As shown, the bolt carrier 3 is completely pressed down by the end of the sleeve 1, and the bolt 2 is locked.

[0028] In summary, this invention solves the problem of wedging in lightweight weapons using rectangular bolt carriers. It is also ingeniously designed, simple in structure, easy to clean and maintain, and can improve the reliability of firearms.

Claims

1. A lightweight weapon anti-wedge structure, comprising a sleeve, a bolt, and a bolt carrier; wherein the bolt and the bolt carrier have a coaxial engagement with the bolt hole, characterized in that, The bolt carrier has a rectangular longitudinal section; The bolt carrier is provided with a rotation locking lug groove, and the rotation locking lug groove is provided with a rotation locking lug. The rotation locking lug can rotate relative to the bolt carrier, and the bolt carrier is provided with an elastic reset mechanism, which can apply an elastic force to the rotation locking lug, so that the rotation locking lug abuts against the guide post, and the guide post cannot move axially relative to the bolt carrier. The guide post is inserted into the bolt, and the firing pin passes through the guide post and the bolt carrier; The bolt carrier has a curved groove on its side end, and the guide post is located inside the curved groove. When the bolt enters the sleeve, the sleeve can cooperate with the slewing block, causing the slewing block to overcome the elastic force and rotate and separate from the guide post, so that it can move in the curved groove and drive the bolt to rotate to complete the locking.

2. The lightweight weapon anti-wedge structure according to claim 1, characterized in that, The elastic reset mechanism includes a pivot locking spring and a pivot locking spring top. The pivot locking spring and the pivot locking spring top are located in the pivot locking spring hole of the bolt carrier. One end of the pivot locking spring top abuts against the pivot locking iron, and the other end is inserted into the pivot locking spring.

3. The lightweight weapon anti-wedge structure according to claim 1, characterized in that, The end of the sleeve has an inclined surface that allows the slewing catch to rotate. Before the bolt is fully engaged in the sleeve locking mechanism, the inclined surface on the sleeve can collide and press against the slewing catch, causing the slewing catch to rotate and no longer press against the guide post, which then moves along the curved groove.

4. The lightweight weapon anti-wedge structure according to claim 1, characterized in that, The bolt carrier is fixed with a pivot locking pin, and the pivot locking pin rotates around the pivot locking pin in the pivot locking pin relief groove.

5. The lightweight weapon anti-wedge structure according to claim 1, characterized in that, The firing pin hole on the guide post is coaxial with the firing pin hole inside the bolt, and the firing pin passes through these two firing pin holes in sequence.

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