JP3782860B2 - Ranma driving method of cannon - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of driving a rotary chamber of a rotary chamber-type cannon.
[0002]
[Prior art]
A rotating chamber-style cannon is composed of a chamber drum in which a plurality of chambers are arranged at equal intervals on the same circumference, a loading mechanism that pushes ammunition into a predetermined chamber, and an intermittent drive that intermittently drives the chamber drum. It is equipped with a mechanism, etc., which continuously loads and closes ammunition into the chamber, fires bullets, and discharges the charge remaining in the chamber. The chamber drum is stopped while the ammunition is loaded in a predetermined chamber, and the ammunition is transferred to another chamber by a loading drive mechanism equipped with a rammer while the chamber drum is stopped. Then, it is rotated by 1 pitch by the intermittent drive mechanism. Ranma performs a reciprocal movement consisting of a forward movement for loading ammunition and a backward movement for returning. Therefore, the movement of the rammer is performed in synchronization with the rotation and stop of the chamber drum.
[0003]
[Problems to be solved by the invention]
However, such a conventional cannon has the following technical problems because it is provided with an intermittent drive mechanism for the chamber drum and a loading drive mechanism for the rammer separately.
[0004]
The conventional loading operation of ammunition is performed by driving the loading drive mechanism while the chamber drum is stopped, that is, during the stop after the intermittent indexing rotary motion of the chamber drum is completed. Usually, the ratio of the stop time and the rotation index time in one cycle in which the chamber drum rotates once is 1: 3 in consideration of the shooting time, and the stop time occupies 25% of the cycle time. Yes. As described above, since the stop time for loading in this one cycle time is short, the loading speed and loading acceleration of the ammunition are increased, and there is a disadvantage that it is necessary to apply a large ramper driving force to the loading drive mechanism. In addition, the chamber drum indexing drive by the intermittent drive mechanism and the reciprocating operation of the rammers by the loading drive mechanism each require a driving force and have a drawback in that the structure must be matched and the structure becomes complicated.
[0005]
[Means for Solving the Problems]
The present invention has been made in view of such a conventional technical problem, and the configuration thereof is as follows.
According to the first aspect of the present invention, in the rotating chamber type cannon, the gun rack 1 provided with the barrel 4 and the ammunition guide portion 2c defined by the chamber 2a and the ammunition holding portion 2b have the same center axis. A plurality of chamber drums 2 formed on the circumference and rotatably supported by the gun rack 1, and fixed to the gun rack 1 in an inserted state in the chamber drum 2, are arranged on the outer circumferential surface behind the drug chamber 2a. The cam drum 3 in which the endless helical cam groove 3b is formed and the rammer guide portion 2d formed in the vicinity of the ammunition guide portion 2c of the chamber drum 2 are arranged so as to be movable back and forth. Are provided with a plurality of rammers 5 on which the protrusions 5a are slidably engaged, and an intermittent drive mechanism 16 for giving the chamber drum 2 an intermittent rotational motion. No Rama 5 The ammunition 12 is moved forward and backward along the cam groove 3b while being guided by 2d, and the ammunition 12 supplied to the ammunition guide portion 2c ahead of the runner 5 is loaded toward the predetermined chamber 2a. This is a method of driving the machine gun.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment in which the method for driving a machine gun according to the present invention is applied to a rotary chamber-type push-through type machine gun. In the figure, reference numeral 1 denotes a gun mount, on which a cam drum 3 is fixed, a chamber drum 2 is rotatably supported, and one gun barrel 4 is fixed. . The cam drum 3 is fixed to the gun stand 1 in a cantilevered state with the cam drum 3 inserted into the chamber drum 2 from the front (left side in FIG. 1). The chamber drum 2 is rotatably supported on the cam drum 3 with a bearing 7 at the front end and a bearing 8 at the rear end, and is further rotatable on the gun mount 1 with a bearing 9 at the rear end. It is supported by. Accordingly, the chamber drum 2 is rotatable with respect to the gun mount 1 and the cam drum 3.
[0007]
The chamber drum 2 has a plurality of (six in this example) chambers 2a having a circular cross section formed on the outer periphery of the front portion thereof so that the barrel 4 and the cam drum 3 are parallel to the central axis. The rear of 2a is divided into a plurality (six) in the circumferential direction, and a ramp guide portion 2d extends in the central axis direction. Moreover, the ammunition holding part 2b is formed on both sides connected to the outer diameter part of the rammer guide part 2d so as to face each other, and the semicircular space having the same central axis as each medicine chamber 2a by the facing ammunition holding part 2b. The ammunition guide portion 2c is defined. As shown in FIG. 4, the rammer guide portion 2d is formed in a cross shape having an open radial direction, and an intermediate portion of the rammer 5 described later is slidably engaged.
[0008]
As shown in FIG. 1, the ammunition holding part 2b is actually formed at two locations for each medicine chamber 2a as a predetermined interval in the front-rear direction. The chamber 2a ₅ located at a predetermined position (lower end) in FIG. 2 is coincident with the gun barrel 4 shown in FIG. Accordingly, the chamber drum 2 is driven by an intermittent drive mechanism 16 to be described later and rotates intermittently, and the chamber 2a ₄ , the chamber 2a ₃ , the chamber 2a ₂ , the chamber 2a ₁ , and the chamber 2a ₆ are The gun barrel 4 and the central axis coincide with each other by reaching the position of the chamber 2a ₅ shown in FIG.
[0009]
A dome portion 1b is formed at an intermediate portion of the gun rack 1 at a position rearward of the chamber 2a so as to cover the ammunition holding portion 2b of the chamber drum 2, and a part of the dome portion 1b is shown in FIG. As shown, a bullet feed hole 1c is formed. Ammunition 12 is supplied from outside through Kyudan'ana 1c, it is fed to a predetermined ammunition guide portion 2c _1. At the location corresponding to the bullet feed hole 1c, the runner 5 takes the most retracted position as shown by the phantom line in FIG. 1, and the ammunition 12 is successively supplied in front of the runner 5 taking this position.
[0010]
The cam drum 3 is formed with an endless winding cam groove 3b on the rear half thereof, that is, on the outer peripheral surface at a position rearward of the drug chamber 2a, and the protrusions 5a of the rammers 5 are slidable in the cam groove 3b. Is engaged. Thus, the rammer 5 can move back and forth along the shape of the cam groove 3b while being guided by the rammer guide portion 2d in the vicinity of the ammunition guide portion 2c, behind the chamber 2a. Also, the closing portion 1a at the lower end center of the gun carriage 1 is projected, the rear for the chamber 2a ₅ reaching the lower end position is by connexion closed closure 1a. The closing portion 1a is provided with a firing mechanism 14.
[0011]
The chamber drum 2 is driven and rotated by the intermittent mechanism 6. Since the intermittent mechanism 6 converts the rotational motion of the motor 11 into the intermittent rotational motion of the shaft 10, the chamber drum 2 rotates intermittently by the shaft 10. The intermittent mechanism 6 and the motor 11 constitute an intermittent drive mechanism 16. In the example shown in the figure, since six chambers 2a are provided, one step of intermittent rotation consists of 60 ° rotation of the chamber drum 2, and then stops at the position shown in FIGS. The ratio between the rotation time and the stop time is 3: 1 in consideration of the shooting time. The time of step consisting of rotation and stop, that is, the firing speed, is adjusted by increasing or decreasing the rotational speed of the motor 11.
[0012]
Next, the operation will be described.
Now, it is assumed that the ammunition 12 or the cartridge case 12b successively supplied from the bullet feed hole 1c is held in the respective ammunition guides 2c or the chamber 2a. If the chamber drum 2 is rotated by one step (60 °) in one direction (in the direction of arrow A shown in FIG. 3) by the intermittent drive mechanism 16, each rammer 5 corresponds to the groove shape, that is, the inclination of the cam groove 3 b to be engaged. Move forward or backward. FIG. 5 shows that the ramper 5 moves along the cam groove 3b in three steps forward (rammers 5 _{1 to} 5 ₄ ), two steps backward (rammers 5 _{4 to} 5 ₆ ), and one stop step (rammers 5 _{6 to} 5 ₁ ). An example is shown. The cam groove 3b ₁ indicates a forward portion, the cam groove 3b ₂ indicates a backward portion, and the cam groove 3b ₃ indicates a stop portion.
[0013]
The rammers 5 _{1 to} 5 ₄ taking the three forward steps perform an operation of pushing the ammunition 12 into the chamber 2a, and the rammers 5 _{3 to} 5 ₄ taking one step of the forwards move the cartridge case remaining in the chamber 2a forward. The rammers 5 _{4 to} 5 _6, which take two steps backward, perform the backward operation. The rammer 5, a stop in one step between the rammer 5 _{6-5 1.} Therefore, while the chamber drum 2 is intermittently rotated 360 °, the ramper 5 performs six steps of forward and backward advance and stop. In FIG. 5, S ₁ indicates the forward stroke of the ramper 5 for one step of the chamber drum 2, S _L indicates the full stroke of the ramper 5, and S ₂ indicates the reverse stroke of the ramper 5 for one step of the chamber drum 2. Indicates.
[0014]
Since this cannon is a push-through type, the ammunition 12 is loaded into the chamber 2a just before the gun barrel 4 is matched, and at the same time, the cartridge case remaining in the chamber 2a is pushed forward, and then the gun barrel 4 is matched with the gun barrel 4. Shoot. Accordingly, the retreating operation of the rammers 5 _{4 to} 5 ₅ is performed irrespective of the ammunition 12.
[0015]
In the state where the ammunition 12 is supplied from the bullet feed hole 1c in the ammunition guide portion 2c _1, rammer 5 ₁ as described above is convex most retracted position as shown in phantom in FIG. 1. Thereafter, the rammer 5 that has been stopped with the rotation of the chamber drum 2 starts to advance, and in the rammers 5 _{1 to} 5 ₄ , the ammunition 12 is gradually pushed into the chemical chamber 2a to complete the loading. Between the rammers 5 _{3 to} 5 _4, the front of the chamber 2a (the chamber 2a _{3 to} 2a ₄ shown in FIG. 2) is still open without being hindered by the gun barrel 4, so that the chamber 2a New ammunition 12 is loaded while the remaining cartridge case is pushed forward.
[0016]
Thereafter, the rammer 5 while leaving the ammunition 12 in Kusurishitsu the 2a moves to backward movement, the rear for the chamber 2a ₅ of the lower end at the position of the rammer 5 ₅ is by connexion closed closure 1a. I connexion ammunition 12 to the action of the percussion mechanism 14 in this state is percussion, bullet 12a shown in FIG. 1 is fired from the gun barrel 4, cartridge 12b remains in the medication chamber 2a _5. Furthermore, it retreats between the rammers 5 _{5 to} 5 ₆ , and then returns to the position of the rammers 5 ₁ .
[0017]
In FIG. 2, the loading operation is performed between the chambers 2 a _{1 to} 2 a _4, and the chamber 2 a ₅ shoots at a position that matches the gun barrel 4. Between the drug chamber 2a ₄ to 2A region ₆ retracts rammer 5, between the drug chamber 2a ₆ to 2A region ₁ rammer 5 is stopped.
[0018]
By the way, in the above-described embodiment, the ramper 5 is stopped in one step between the rampers 5 _{6 to} 5 ₁ (chambers 2a _{6 to} 2a ₁ ). It is also possible to set the shape of the cam groove 3b so as to give a forward movement following the backward movement.
[0019]
【The invention's effect】
As can be understood from the above description, according to the method of driving the machine gun according to the present invention, the following effects can be obtained.
(1) Since ammunition is loaded by a runner driven by the rotation of the chamber drum, a long loading time can be secured. Specifically, the loading time can be increased from 1/4 to 3/4 of the conventional one cycle time. As a result, the speed and acceleration applied to the rammer can be reduced as compared with the conventional example. Further, the torque required for driving the rammer and thus the power can be reduced.
[0020]
(2) The driving of the chamber drum and the driving of the rammer are performed by the same indexing operation. For this reason, the structure is simplified as compared with the conventional example in which the intermittent drive mechanism for the chamber drum and the loading drive mechanism for the rammer are separately provided. In particular, the movable parts that operate for loading / closing ammunition into the chamber, firing the bullets, and discharging the charge remaining in the chamber are only the chamber drum and the ramma, which improves reliability and durability.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a machine gun according to an embodiment of the present invention with a cam groove partially omitted.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a cross-sectional view taken along line III-III in FIG.
4 is an enlarged cross-sectional view of the main part of FIG.
FIG. 5 is an explanatory view showing a ramp stroke during one rotation of the chamber drum.
[Explanation of symbols]
1: gun mount, 2: chamber drum, 2a: chamber, 2b: ammunition holder, 2c: ammunition guide, 2d: rammer guide, 3: cam drum, 3b: cam groove, 4: gun barrel, 5: rammer, 5a: protrusion, 16: intermittent drive mechanism.

Claims (1)

In the rotating chamber type cannon, the gun rack (1) having the barrel (4) and the ammunition guide portion (2c) defined by the chamber (2a) and the ammunition holding portion (2b) have the same central axis. A plurality of chamber drums (2) formed on the same circumference and rotatably supported by the gun rack (1), and fixed to the gun rack (1) in an inserted state in the chamber drum (2), A cam drum (3) having an endless spiral cam groove (3b) formed on the outer peripheral surface behind the chamber (2a), and a rammer formed near the ammunition guide (2c) of the chamber drum (2) A plurality of rammers (5) that are guided by the guide portion (2d) and are movably disposed back and forth, and in which the protrusions (5a) are slidably engaged with the cam grooves (3b) of the cam drum (3); An intermittent drive mechanism (16) for applying an intermittent rotational motion to the chamber drum (2),
When the chamber drum (2) performs an intermittent rotational motion, the plurality of rammers (5) are moved forward and backward along the cam groove (3b) while being guided by the rammer guide portion (2d). A method for driving a machine gun ramma, wherein the ammunition (12) supplied to the ammunition guide (2c) ahead of 5) is loaded toward a predetermined chamber (2a).

Images