Muzzle connecting structure

Abstract

The utility model discloses a muzzle connecting structure which is simple in structure, quick to mount and dismount and good in universality. Comprising a barrel body and a barrel cover, the barrel body is in a step shaft shape, the large-diameter section of the barrel body is used for installing a functional device, a plurality of supporting lugs and a plurality of mortise and tenon holes are arranged on the peripheral face of the small-diameter section of the barrel body, the barrel cover is in clearance fit with the small-diameter section of the barrel body, a barrel cover end plate, a first check ring and a second check ring are arranged on the inner wall of the barrel cover, and a supporting lug rotating groove is formed between the barrel cover end plate and the first check ring; a mortise and tenon movement receding groove is formed between the first check ring and the second check ring, a threaded connection hole is formed in one end of each mortise and tenon, an arc is arranged at the other end of each mortise and tenon, the threaded connection holes of the mortises and tenons are connected with the middle of a mortise and tenon shaft, and the two ends of the mortise and tenon shaft are cylindrical sections. The first check ring and the second check ring are provided with a plurality of mortise and tenon shaft guiding spiral grooves corresponding to the mortise and tenon shafts, and the cylindrical sections at the two ends of each mortise and tenon shaft are arranged in the mortise and tenon shaft guiding spiral grooves in the first check ring and the second check ring in a sliding fit mode respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of firearms, in particular to a muzzle connection structure. Background Art

[0002] The muzzle of a firearm is typically constructed by press-fitting a muzzle device onto the front end of the barrel (the overall shape is similar to a stepped cylinder connected to a large cylinder in front of a small cylinder). The muzzle device reduces muzzle smoke and flames and protects the muzzle. Sometimes, to expand the firearm's functionality under special conditions or facilitate training exercises, it is necessary to attach a silencer, blank cartridge recoil assist device, ejector, laser, indicator trainer, illuminator, or other device to the muzzle. The present utility model provides a universal connection structure for connecting these devices or equipment to the muzzle. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a muzzle connection structure with simple structure, quick installation and disassembly, and good versatility.

[0004] The purpose of this utility model is achieved in this way:

[0005] A muzzle connection structure includes a barrel and a barrel cover. The outer surface of the barrel is in a stepped shaft shape. The large diameter section of the barrel is used to install a functional device, and the small diameter section of the barrel is used to connect to the barrel muzzle device. The outer circumference of the small diameter section of the barrel is provided with a plurality of lugs and a plurality of tenon holes. The plurality of lugs and the plurality of tenon holes are evenly distributed along the circumference of the small diameter section of the barrel.

[0006] The cylinder cover is clearance-matched with the small-diameter section of the cylinder body. The cylinder cover end plate, the first retaining ring, and the second retaining ring are sequentially provided on the inner wall of the cylinder cover. A lug rotation groove is formed between the cylinder cover end plate and the first retaining ring. The lug on the cylinder body is inserted into the lug rotation groove and can rotate in the lug rotation groove. The first retaining ring and the second retaining ring are provided with a plurality of lug clearance grooves corresponding to the lugs on the cylinder body. The lug clearance grooves are used to make way for the lugs when they are inserted into the lug rotation grooves.

[0007] The first retaining ring and the second retaining ring are used to slide the tenon shaft into the guide grooves of the tenon shaft so that the tenon can move in a circular motion.

[0008] Preferably, anti-slip straight lines are provided on the outer circle of the cylinder cover.

[0009] Preferably, the threaded section of the tenon shaft is coated with thread glue.

[0010] Preferably, a plurality of tenon shaft installation process holes corresponding to the plurality of tenon shafts are provided on the end plate of the cylinder cover, and the tenon shaft installation process holes are used to make way for the tenon shafts when installing the tenon shafts.

[0011] Preferably, a screwdriver slot is provided on the rear end surface of the tenon shaft, and the screwdriver slot is used to install the tenon shaft by screwing it with a screwdriver.

[0012] Preferably, the outer diameter of the large diameter section of the cylinder is equal to the outer diameter of the cylinder cover.

[0013] Preferably, the interior of the large diameter section of the cylinder is used to place the functional device, and the end of the large diameter section of the cylinder is provided with a connecting thread.

[0014] Preferably, the diameter of the circular arc is equal to the outer diameter of the corresponding barrel muzzle arrangement.

[0015] Due to the adoption of the above technical solution, the utility model has a simple structure, quick installation and disassembly, convenient and reliable use, high positioning accuracy, good versatility, can be easily connected to various functional modules, and has good scalability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 Schematic diagram of the cylinder cover structure;

[0018] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0019] Figure 4 yes Figure 2 Cross-sectional view of the middle BB;

[0020] Figure 5 It is a schematic diagram of the cylinder structure;

[0021] Figure 6 yes Figure 5 Cross-sectional view of CC;

[0022] Figure 7 yes Figure 5 Cross-sectional view of the middle DD;

[0023] Figure 8 It is a schematic diagram of the tenon structure;

[0024] Figure 9 It is a schematic diagram of the tenon shaft structure.

[0025] Reference numerals

[0026] In the accompanying drawings, 1 is a cylinder cover, 11 is a straight circular hole, 12 is a hole for mounting the tenon shaft, 13 is a first retaining ring, 14 is a second retaining ring, 131 and 141 are support ear clearance grooves, 132 and 142 are guide spiral grooves for the tenon shaft, 15 is a support ear rotation groove, 16 is a tenon movement clearance groove, and 17 is an anti-slip straight groove;

[0027] 2 is a cylinder, 21 is a small straight round tube (small diameter section), 211 is a support ear, 212 is a mortise hole, 22 is a large straight round tube (large diameter section), and 221 is a thread;

[0028] 3 is a tenon, 31 is a threaded hole, and 32 is an arc;

[0029] 4 is a tenon shaft, 41 is a screwdriver slot, 42 is a first cylindrical section, 43 is a threaded section, and 44 is a second cylindrical section. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0031] A muzzle connection structure comprises a barrel 2 and a barrel cover, the outer circumference of which is provided with anti-slip straight grooves. The outer surface of the barrel 2 is a stepped shaft. The large diameter section of the barrel 2 is used to mount functional devices, and its outer diameter is equal to the outer diameter of the barrel cover. The small diameter section 21 of the barrel 2 is used to connect to the barrel muzzle assembly. The outer circumference of the small diameter section 21 of the barrel 2 is provided with multiple lugs 211 and multiple tenon holes 212, which are evenly distributed along the circumference of the small diameter section 21 of the barrel 2.

[0032] The cylinder cover 1 is clearance-fitted with the small-diameter section of the cylinder body. A cylinder cover end plate, a first retaining ring 13, and a second retaining ring are sequentially provided on the inner wall of the cylinder cover. A lug rotation groove 15 is formed between the cylinder cover end plate and the first retaining ring. The lug on the cylinder body 211 is inserted into the lug rotation groove 15 and can rotate in the lug rotation groove 15. A plurality of lug clearance grooves are provided on the first retaining ring and the second retaining ring corresponding to the lug on the cylinder body 211. The lug clearance grooves are used to make way for the lug 211 when it is inserted into the lug rotation groove 15.

[0033] A tenon 3 is loosely fitted in each tenon hole 212, and a tenon movement clearance groove 16 is formed between the first retaining ring and the second retaining ring. The tenon is located in the tenon movement clearance groove 16 and can rotate in the tenon movement clearance groove 16. One end of the tenon is provided with a threaded connection hole 31, and the other end of the tenon 3 is provided with an arc 32. The threaded connection hole 31 of the tenon 3 is connected to the threaded section 43 in the middle of the tenon shaft 4, and the threaded section 43 of the tenon shaft 4 is coated with thread glue. The two ends of the tenon shaft 4 are cylindrical sections, and a plurality of tenon shaft guide spiral grooves are provided on the first retaining ring and the second retaining ring corresponding to the tenon shaft 4. The cylindrical sections at both ends of the tenon shaft 4 are respectively slidably fitted in the tenon shaft guide spiral grooves 132 on the first retaining ring 13 and the second retaining ring 14. The tenon shaft guide spiral grooves are used to guide the tenon shaft to slide in the tenon shaft guide spiral grooves 132 and make the tenon 3 move radially. When the tenon 3 is at the inner limit position, the arc 32 of the tenon 3 clamps the barrel muzzle device. When the tenon 3 is at the outer limit position, the arc 32 of the tenon 3 releases the barrel muzzle device.

[0034] The end plate of the cylinder cover is provided with a plurality of mortise shaft installation process holes 12 corresponding to the plurality of mortise shafts, and the mortise shaft installation process holes 12 are used to make way for the mortise shaft when installing the mortise shaft 4. The rear end surface of the mortise shaft 4 is provided with a screwdriver groove, and the screwdriver groove is used to screw and install the mortise shaft by a screwdriver.

[0035] The assembly process is as follows:

[0036] Step 1: Align the small straight circular tube 21 at the front of the cylinder body 2 with the straight circular hole 11 of the cylinder cover 1, align the lug 211 on the small straight circular tube 21 at the front of the cylinder body 2 with the lug clearance groove 131 on the lug of the first retaining ring 13 of the cylinder cover 1 and the lug clearance groove 141 on the second retaining ring 14, axially insert the lug 211 into the lug rotation groove 15, and rotate the cylinder body 2. The lug 211 can rotate in this lug rotation groove 15.

[0037] Step 2: Insert the tenon 3 from the tenon hole 212 on the small straight round tube 21 of the cylinder body 2, so that its arc 32 faces the inner arc of the straight round tube 21, and the threaded connection hole 31 faces the first retaining ring 13 tenon shaft guide spiral groove 132 and the second retaining ring 14 tenon shaft guide spiral groove 142 of the cylinder cover 1; apply thread glue on the threaded section 43 of the tenon shaft 4, insert the rotating tenon shaft 4 from the tenon shaft installation process hole 12 on the cylinder cover 1, and pass through the first and second retaining rings 13 and 142 of the cylinder cover 1 respectively. The retaining ring 13 has a guide spiral groove 132 for the tenon shaft, a threaded connection hole 31 for the tenon 3, and a guide spiral groove 142 for the tenon shaft of the second retaining ring 14. The first cylindrical section 42 of the tenon shaft 4 matches the guide spiral groove 132 for the tenon shaft on the first retaining ring 13 of the cylinder cover 1, the second cylindrical section 44 of the tenon shaft 4 matches the guide spiral groove 142 for the tenon shaft on the second retaining ring 14 of the cylinder cover 1, and the threaded section 43 of the tenon shaft 4 matches the threaded connection hole 314 of the tenon 3.

[0038] Step 3: Repeat step 2 twice to complete the assembly of the tenon shafts 4 (3 pieces).

[0039] The working process is as follows:

[0040] First, open the muzzle connection structure. Hold the barrel 2 with your right hand and the barrel cover 1 with your left hand, and rotate the barrel cover 1 counterclockwise. The first retaining ring 13 of the barrel cover 1 guides the spiral groove 132 of the latch shaft and the second retaining ring 14 guides the spiral groove 142 of the latch shaft; this drives the first cylindrical section 42 of the latch shaft 4 that matches the spiral groove 132 of the latch shaft on the first retaining ring 13 of the barrel cover 1, and the second cylindrical section 44 of the latch shaft 4 that matches the spiral groove 142 of the latch shaft on the second retaining ring 14 of the barrel cover 1, to move toward the spiral groove 132. The distal end of the guide spiral groove 142 slides (outward), and at the same time, the threaded section 43 of the tenon shaft 4 and the matching threaded section 43 of the tenon 3 drive the three tenons 3 to move outward perpendicularly to the axis of the barrel 2 in the tenon hole 212. When the limit position is reached, the three tenons are all accommodated in the barrel tenon hole 212, and the arcs 32 of the three tenons 3 are all recessed into the inner wall of the small straight circular tube 21 of the barrel 2. At this time, the muzzle connection structure is in a non-operating state (non-connected state). If the muzzle connection structure is already open, this step can be omitted.

[0041] Then, load the muzzle connection structure and insert the opened muzzle connection structure from the muzzle.

[0042] Finally, lock the muzzle connection structure to achieve the connection between the muzzle connection structure and the muzzle. Hold the cylinder body 2 with the right hand and the cylinder cover 1 with the left hand, and rotate the cylinder cover 1 clockwise. The first retaining ring 13 of the cylinder cover 1 guides the spiral groove 132 of the tenon shaft and the second retaining ring 14 guides the spiral groove 142 of the tenon shaft; drive the first cylindrical section 42 of the tenon shaft 4 that matches the tenon shaft guide spiral groove 132 on the first retaining ring 13 of the cylinder cover 1, and the second cylindrical section 44 of the tenon shaft 4 that matches the tenon shaft guide spiral groove 142 on the second retaining ring 14 of the cylinder cover 1, to slide toward the proximal end (inward) of the spiral groove 132 guiding the spiral groove 142. At the same time, the threaded section 43 of the tenon shaft 4 and the matching threaded section 43 of the tenon 3 drive the three tenons 3 to the tenon holes of the cylinder body 2. When 212 moves inward perpendicular to the axis of the barrel and reaches the extreme position, the three tenons all protrude from the tenon hole 212 of the barrel, that is, the three arcs 32 of the three tenons all protrude from the inner hole wall of the small straight circular tube 21 of the barrel 2. At this time, the three arcs 32 of the three tenons all protrude from the inner hole wall of the small straight circular tube 21 of the barrel 2, and the three arcs 32 of the three tenons all protrude from the barrel and match the outer circle of the barrel, and their three front end faces match the rear end face of the outer circle of the barrel muzzle device (stuck on the rear end face of the outer circle of the muzzle device). The muzzle connecting structure is in a connected state (working state). The muzzle connecting structure cannot be removed from the muzzle, realizing the connection state of the muzzle connecting structure at the muzzle.

[0043] Description of each component:

[0044] The cylinder cover is a thin-walled circular cover-shaped body with a straight circular hole in its axial direction, which matches the small straight circular tube in the front of the cylinder body. Its inner diameter is the same as the outer diameter of the small straight circular tube in the front of the cylinder body. There are three mortise shaft installation process holes on the cylinder cover end plate for installing the mortise shaft. The first retaining ring and the second retaining ring are arranged in the cylinder cover from back to front. A support ear rotation groove is provided between the inner wall of the cylinder cover end plate and the rear wall of the first retaining ring. The groove width is equal to the thickness of the cylinder support ear. The cylinder support ear can rotate in this groove; between the first retaining ring and the second retaining ring There is a tenon movement clearance groove in between, and its groove width is equal to the thickness of the tenon, and the tenon can rotate in this groove; 3 cylinder support ear clearance grooves are evenly arranged on the first retaining ring and the second retaining ring, and their width is equal to the width of the support ear, which is used to make way for the support ear when the cylinder is installed. At the same time, 3 tenon shaft guide spiral grooves are also evenly arranged on the first retaining ring and the second retaining ring, and their groove width is equal to the first and second cylindrical diameters of the tenon shaft, which is used to guide the tenon shaft to slide in its spiral groove, and anti-slip straight lines are provided on the outer cylindrical surface of the cylinder cover.

[0045] The front part of the barrel is a small straight round tube that contains the muzzle device (the structure at the front end of the barrel). Its diameter is equal to the outer diameter of the muzzle device. Three evenly distributed lugs are arranged in sequence on the small straight round tube for connecting the barrel cover. Its width is equal to the width of the groove for the lugs of the first and second retaining rings on the barrel cover, and its thickness is equal to the width of the groove between the inner surface of the front end cover of the barrel cover and the first retaining ring. The lug can rotate in this groove and also plays the role of connecting the barrel body and the barrel cover; three evenly distributed mortise holes are opened on the rear part of the small straight round tube lug to accommodate the radial movement of the guide mortise. The rear part of the barrel is a large straight round tube with an outer diameter equal to the outer diameter of the barrel cover. The rear part is provided with a thread for connecting the front end cover (or other devices, this patent is not equipped with or involves the front end cover). Its interior can be used to place various silencers, flame suppressors, lighting, indicators, blank cartridge recoil brakes, blank cartridge live ammunition ejectors, or use threads to connect the above functional devices. (This patent does not involve)

[0046] The tenon is a sheet-like body, and its front and rear surfaces are parallel when viewed from the side. A threaded connection hole is provided on the upper part of the tenon for connecting the tenon shaft, and an arc is provided on the lower part with the same radius as the outer circle of the clamped barrel. Driven by the tenon shaft, the tenon moves outward and inward perpendicular to the axis of the barrel in the tenon hole of the barrel. When it moves outward to the extreme position, the tenon is accommodated in the tenon hole of the barrel. At this time, the muzzle connection structure is in a non-working state (non-connected state), and the muzzle connection structure can be installed or removed; when it moves inward to the extreme position, the tenon protrudes out of the tenon hole of the barrel, and its lower arc cooperates with the outer circle of the barrel, and its front end face is clamped on the rear arc end face of the barrel muzzle device. At this time, the muzzle connection structure is in a working state (connected state), and the muzzle connection structure cannot be removed from the muzzle.

[0047] A thread is provided in the middle of the tenon shaft for connecting the tenon, and the front and rear edges are cylindrical. The first and second retaining rings in the cylinder cover slide in the tenon lifting guide spiral groove, and the rear end face is provided with a flat screwdriver groove for the screwdriver to pass through the tenon shaft installation process hole at the front end of the cylinder cover to twist and install the tenon shaft.

[0048] 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 limiting. 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 in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A muzzle connection structure, characterized in that: It includes a barrel and a barrel cover. The outer surface of the barrel is in the shape of a stepped shaft. The large diameter section of the barrel is used to install the functional device, and the small diameter section of the barrel is used to connect the barrel muzzle device. The outer circumference of the small diameter section of the barrel is provided with a plurality of lugs and a plurality of tenon holes. The plurality of lugs and the plurality of tenon holes are evenly distributed along the circumference of the small diameter section of the barrel. The cylinder cover is clearance-matched with the small-diameter section of the cylinder body. The cylinder cover end plate, the first retaining ring, and the second retaining ring are sequentially provided on the inner wall of the cylinder cover. A lug rotation groove is formed between the cylinder cover end plate and the first retaining ring. The lug on the cylinder body is inserted into the lug rotation groove and can rotate in the lug rotation groove. The first retaining ring and the second retaining ring are provided with a plurality of lug yielding grooves corresponding to the lugs on the cylinder body. The lug yielding grooves are used to yield when the lug is inserted into the lug rotation groove. The first retaining ring and the second retaining ring are used to slide the tenon shaft into the guide grooves of the tenon shaft so that the tenon can move in a circular motion.

2. The muzzle connection structure according to claim 1, characterized in that: Anti-slip straight lines are provided on the outer circle of the cylinder cover.

3. The muzzle connection structure according to claim 1, characterized in that: The threaded section of the tenon shaft is coated with thread glue.

4. The muzzle connection structure according to claim 1, characterized in that: A plurality of mortise shaft installation process holes corresponding to the plurality of mortise shafts are provided on the end plate of the cylinder cover. The mortise shaft installation process holes are used to make way for the mortise shafts when installing the mortise shafts.

5. The muzzle connection structure according to claim 1, characterized in that: A screwdriver slot is provided on the rear end surface of the tenon shaft, and the screwdriver slot is used to install the tenon shaft by screwing it with a screwdriver.

6. The muzzle connection structure according to claim 1, characterized in that: The outer diameter of the large diameter section of the cylinder is equal to the outer diameter of the cylinder cover.

7. The muzzle connection structure according to claim 1, characterized in that: The interior of the large diameter section of the cylinder is used for placing functional devices, and the end of the large diameter section of the cylinder is provided with a connecting thread.

8. The muzzle connection structure according to claim 1, characterized in that: The diameter of the arc is equal to the outer diameter of the corresponding barrel muzzle device.

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