A structure for preventing the receiver cover of a rifle from falling off and its installation and disassembly method.

Abstract

This invention discloses a structure and installation / removal method for preventing the receiver cover of a rifle from detaching. It includes a receiver cover, a guide seat, a sight seat, and a lower receiver assembly. The guide seat is located inside the receiver cover, the sight seat is mounted in front of the receiver cover, and the bottom of the guide seat is mounted on the lower receiver assembly. The rear end of the receiver cover has a square hole. The rear end of the guide seat has a rear boss that passes through the square hole in the receiver cover. The top rear end of the rear boss has a second protrusion that engages with the upper wall of the square hole to longitudinally limit the guide seat. The bottom rear end of the rear boss has a chamfered edge for inserting or removing the rear boss from the square hole in the receiver cover. The bottom of the guide seat has mounting guide ribs on both sides. Behind the lower receiver assembly, there is a guide seat mounting groove and a third protrusion. The mounting guide ribs of the guide seat engage with the mounting guide groove of the lower receiver assembly, and the third protrusion prevents the receiver cover from sliding backward.

Description

Technical Field

[0001] This invention relates to the field of firearms technology, and in particular to a structure for preventing the receiver cover of a rifle from falling off, and a method for installing and removing it. Background Technology

[0002] When a rifle fires a muzzle grenade, the recoil impulse generated by the propellant gases is far greater than that generated when firing ordinary ammunition. During the firing of a muzzle grenade, because the automatic mechanism is not securely engaged with the receiver, the bolt assembly gains a large recoil velocity during the recoil process, compressing the recoil spring. The recoil spring gains significant potential energy, and when the receiver stops recoiling, the recoil spring releases its energy, pushing the automatic mechanism forward. Once the mechanism returns to its original position, the recoil spring, recoil spring guide rod, and guide seat continue to move forward due to inertia, causing the guide seat to displace. This causes the protruding shaft behind the guide seat to dislodge from the receiver cover, resulting in the receiver cover detaching. Therefore, it is necessary to solve the problem of the receiver cover detaching when firing a muzzle grenade. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a structure for preventing the receiver cover of a rifle from falling off, as well as a method for its installation and removal, which can prevent the receiver cover from falling off.

[0004] The objective of this invention is achieved as follows:

[0005] A structure for preventing the receiver cover of a rifle from detaching includes a receiver cover, a guide seat, a rear sight seat, and a lower receiver assembly. The guide seat is located inside the receiver cover, the rear sight seat is mounted in front of the receiver cover, a guide rod and a recoil spring are mounted on the front end of the guide seat, and the bottom of the guide seat is mounted on the lower receiver assembly. Under normal conditions, under the force of the recoil spring, the guide seat is located at the rear of the lower receiver assembly.

[0006] The rear end face of the receiver cover is beveled, and a square hole is provided on the rear end face of the receiver cover; the rear end face of the guide seat is beveled, and a rear boss is provided on the rear end face of the guide seat. The rear boss of the guide seat passes through the square hole on the receiver cover. A second protrusion is provided at the top rear end of the rear boss. The second protrusion is used to cooperate with the upper end wall of the square hole to form a longitudinal limit on the guide seat, preventing the guide seat from moving forward and falling off when the receiver cover is fired from the muzzle grenade. A chamfer is provided at the bottom rear end of the rear boss. The chamfer is used to insert or remove the rear boss into or out of the square hole on the receiver cover.

[0007] The bottom of the guide seat has mounting guide ribs on both sides. Behind the lower casing assembly, there is a guide seat mounting groove and a third protrusion. The mounting guide ribs of the guide seat cooperate with the mounting guide groove of the lower casing assembly, so that the guide seat can move longitudinally. The third protrusion prevents the casing cover from sliding backward.

[0008] Preferably, the rear end face of the scale holder has an arc-shaped groove, the front end of the receiver cover extends into the arc-shaped groove of the scale holder, and a clearance is left between the arc-shaped inner surface of the front end of the receiver cover and the lower wall of the arc-shaped groove. The top of the front end of the receiver cover is provided with a first protrusion, which is arc-shaped. The arc-shaped upper surface of the first protrusion on the receiver cover is engaged and positioned with the outer ring surface of the arc-shaped groove of the scale holder. The first protrusion and the clearance allow the front end of the receiver cover to rotate against the scale holder.

[0009] Preferably, under normal conditions, the lower wall of the square hole on the casing cover mates with the lower plane of the rear boss of the guide seat to form a vertical positioning. When the guide seat is pushed to the front limit position, the starting position of the lower end of the chamfered edge of the guide seat reaches the lower wall of the square hole on the casing cover.

[0010] A method for disassembling a structure that prevents the receiver cover from falling off a rifle.

[0011] Prepare the push rod, which has a flat end and a transverse locking tooth on the rear protrusion of the guide seat;

[0012] Use the flat end of the push rod to abut against the transverse locking teeth on the rear boss of the guide seat and form a locking engagement. Use the push rod to push the guide seat forward. When the starting position of the lower end of the chamfered edge of the guide seat reaches the lower hole wall of the square hole in the casing cover, lift the tail end of the casing cover upward. The starting position of the lower end of the chamfered edge of the guide seat will disengage from the square hole in the casing cover. The front end of the casing cover will rotate against the scale seat, thereby completely rotating the square hole in the casing cover out of the guide seat. Then, remove the casing.

[0013] A method for installing a structure to prevent the receiver cover of a rifle from falling off.

[0014] Prepare the push rod, which has a flat end and a transverse locking tooth on the rear protrusion of the guide seat;

[0015] First, insert the front end of the receiver cover into the arc-shaped groove of the scale seat. Then, use the flat end of the push rod to abut against the transverse locking teeth on the rear boss of the guide seat to form a locking connection. Push the guide seat forward with the push rod, and the square hole at the rear end of the receiver cover will fit into the rear boss of the guide seat. Press the receiver cover into place to complete the installation.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0017] This invention has the advantages of novel structure, convenient operation and strong practicality, and is extremely suitable for use in the firing of muzzle grenades from rifles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the casing cover.

[0019] Figure 2 This is a schematic diagram of the guide seat structure;

[0020] Figure 3This is a schematic diagram of the scale holder structure;

[0021] Figure 4 This is a structural schematic diagram of the lower casing assembly;

[0022] Figure 5 This is a schematic diagram of the structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the push rod structure;

[0024] Figure 7 , Figure 8 This is a disassembly diagram of the present invention. Detailed Implementation

[0025] See Figures 1-6 An embodiment of a structure for preventing the receiver cover of a rifle from falling off includes a receiver cover, a guide seat, a sight seat, and a lower receiver assembly. The guide seat is located inside the receiver cover, the sight seat is installed in front of the receiver cover, a guide rod and a recoil spring are installed at the front end of the guide seat, and the bottom of the guide seat is installed on the lower receiver assembly. Under normal conditions, the guide seat is located at the rear of the lower receiver assembly under the action of the recoil spring force.

[0026] The rear end face of the receiver cover is beveled, and a square hole is provided on the rear end face of the receiver cover; the rear end face of the guide seat is beveled, and a rear boss is provided on the rear end face of the guide seat. The rear boss of the guide seat passes through the square hole on the receiver cover. A second protrusion is provided at the top rear end of the rear boss. The second protrusion is used to cooperate with the upper end wall of the square hole to form a longitudinal limit on the guide seat, preventing the guide seat from moving forward and falling off when the receiver cover is fired from the muzzle grenade. A chamfer is provided at the bottom rear end of the rear boss. The chamfer is used to insert or remove the rear boss into or out of the square hole on the receiver cover.

[0027] The guide seat has mounting guide ribs on both sides at its bottom end. Behind the lower casing assembly, there is a guide seat mounting groove and a third protrusion. The mounting guide ribs of the guide seat cooperate with the mounting guide groove of the lower casing assembly, allowing the guide seat to move longitudinally. The third protrusion prevents the casing cover from sliding backward. Under normal conditions, the lower wall of the square hole on the casing cover cooperates with the lower plane of the rear protrusion of the guide seat to form a vertical positioning. When the guide seat is pushed to the front limit position, the starting position of the lower end of the chamfered edge of the guide seat reaches the lower wall of the square hole in the casing cover.

[0028] The rear end face of the scale holder has an arc-shaped groove. The front end of the receiver cover extends into the arc-shaped groove of the scale holder. A clearance is left between the arc-shaped inner surface of the front end of the receiver cover and the lower wall of the arc-shaped groove. The top of the front end of the receiver cover has a first protrusion. The first protrusion is arc-shaped. The arc-shaped upper surface of the first protrusion on the receiver cover is engaged and positioned with the outer ring surface of the arc-shaped groove of the scale holder. The first protrusion and the clearance allow the front end of the receiver cover to rotate against the scale holder.

[0029] A method for disassembling a structure that prevents the receiver cover from falling off a rifle includes preparing a push rod with a flat end and a transverse locking tooth on the rear protrusion of a guide seat; using the flat end of the push rod to abut against the transverse locking tooth on the rear protrusion of the guide seat to form a locking engagement; using the push rod to push the guide seat forward; when the starting position of the lower end of the chamfered edge of the guide seat reaches the lower wall of the square hole in the receiver cover, lifting the rear end of the receiver cover upwards; the starting position of the lower end of the chamfered edge of the guide seat disengages from the square hole in the receiver cover; the front end of the receiver cover abuts against the rear sight base and rotates, thereby completely rotating the square hole in the receiver cover out of the guide seat; and then removing the receiver.

[0030] A method for installing a structure to prevent the receiver cover from falling off a rifle includes preparing a push rod with a flat end and a transverse locking tooth on the rear protrusion of the guide seat; first, inserting the front end of the receiver cover into the arc-shaped groove of the sight seat, then using the flat end of the push rod to abut against the transverse locking tooth on the rear protrusion of the guide seat to form a locking engagement; pushing the guide seat forward with the push rod, and fitting the square hole at the rear end of the receiver cover into the rear protrusion of the guide seat, pressing the receiver cover into place to complete the installation.

[0031] Specifically:

[0032] See Figure 1 The receiver cover has a first protrusion at the front end and a square hole at the rear end;

[0033] See Figure 2 The guide seat has an upward second protrusion on the upper surface of the rear protrusion to prevent the receiver cover from falling off due to the guide seat moving forward during firing. The lower surface of the guide seat has a chamfered edge to make the receiver cover easier to install and remove. There are guide ribs on both sides of the bottom end of the guide seat. The guide rod and recoil spring are installed at the front end of the guide seat. Under normal circumstances, the guide seat is held at the rear of the lower receiver assembly by the force of the recoil spring.

[0034] See Figure 3 The dial gauge base has an arc-shaped groove on its end face;

[0035] See Figure 4 The lower receiver assembly has a guide seat mounting groove and a third protrusion at the rear. The third protrusion prevents the receiver cover from sliding backward. The guide rib at the bottom of the guide seat cooperates with the mounting guide groove of the lower receiver assembly, allowing the guide seat to move along the direction of the gun body.

[0036] The upper surface of the front protrusion of the receiver cover engages with the outer ring surface of the arc-shaped groove of the scale seat. There is a certain gap between the inner surface of the front of the receiver cover and the arc-shaped groove. The lower edge of the square hole at the rear of the receiver cover mates with the lower plane of the rear boss of the guide seat. The rear face of the receiver cover contacts the rear protrusion of the lower receiver. See details... Figure 5 Installation diagram.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A structure for preventing the receiver cover of a rifle from falling off, comprising a receiver cover, a guide seat, a rear sight seat, and a lower receiver assembly, wherein the guide seat is located inside the receiver cover, the rear sight seat is mounted in front of the receiver cover, a guide rod and a recoil spring are mounted on the front end of the guide seat, and the bottom of the guide seat is mounted on the lower receiver assembly; under normal conditions, under the action of the recoil spring force, the guide seat is located at the rear of the lower receiver assembly, characterized in that: The rear end face of the receiver cover is beveled, and a square hole is provided on the rear end face of the receiver cover; the rear end face of the guide seat is beveled, and a rear boss is provided on the rear end face of the guide seat. The rear boss of the guide seat passes through the square hole on the receiver cover. A second protrusion is provided at the top rear end of the rear boss. The second protrusion is used to cooperate with the upper end wall of the square hole to form a longitudinal limit on the guide seat, preventing the guide seat from moving forward and falling off when the receiver cover is fired from the muzzle grenade. A chamfer is provided at the bottom rear end of the rear boss. The chamfer is used to insert or remove the rear boss into or out of the square hole on the receiver cover. The bottom of the guide seat has mounting guide ribs on both sides. Behind the lower casing assembly, there is a guide seat mounting groove and a third protrusion. The mounting guide ribs of the guide seat cooperate with the mounting guide groove of the lower casing assembly, so that the guide seat can move longitudinally. The third protrusion prevents the casing cover from sliding backward.

2. The structure for preventing the receiver cover from falling off a rifle according to claim 1, characterized in that: The rear end face of the scale holder has an arc-shaped groove. The front end of the receiver cover extends into the arc-shaped groove of the scale holder. A clearance is left between the arc-shaped inner surface of the front end of the receiver cover and the lower wall of the arc-shaped groove. The top of the front end of the receiver cover has a first protrusion. The first protrusion is arc-shaped. The arc-shaped upper surface of the first protrusion on the receiver cover is engaged and positioned with the outer ring surface of the arc-shaped groove of the scale holder. The first protrusion and the clearance allow the front end of the receiver cover to rotate against the scale holder.

3. The structure for preventing the receiver cover from falling off a rifle according to claim 2, characterized in that: Under normal conditions, the lower wall of the square hole on the casing cover mates with the lower plane of the rear boss of the guide seat to form a vertical positioning. When the guide seat is pushed to the front limit position, the starting position of the lower end of the chamfered edge of the guide seat reaches the lower wall of the square hole on the casing cover.

4. A method for disassembling the structure for preventing the receiver cover from falling off the rifle as described in claim 1, characterized in that: Prepare the push rod, which has a flat end and a transverse locking tooth on the rear protrusion of the guide seat; Use the flat end of the push rod to abut against the transverse locking teeth on the rear boss of the guide seat and form a locking engagement. Use the push rod to push the guide seat forward. When the starting position of the lower end of the chamfered edge of the guide seat reaches the lower hole wall of the square hole in the casing cover, lift the tail end of the casing cover upward. The starting position of the lower end of the chamfered edge of the guide seat will disengage from the square hole in the casing cover. The front end of the casing cover will rotate against the scale seat, thereby completely rotating the square hole in the casing cover out of the guide seat. Then, remove the casing.

5. A method for installing the structure for preventing the receiver cover from falling off the rifle as described in claim 1, characterized in that: Prepare the push rod, which has a flat end and a transverse locking tooth on the rear protrusion of the guide seat; First, insert the front end of the receiver cover into the arc-shaped groove of the scale seat. Then, use the flat end of the push rod to abut against the transverse locking teeth on the rear boss of the guide seat to form a locking connection. Push the guide seat forward with the push rod, and the square hole at the rear end of the receiver cover will fit into the rear boss of the guide seat. Press the receiver cover into place to complete the installation.

Images