阅读说明：本技术 自定心小口径弹药底火压装机构 (Self-centering small-caliber ammunition primer press-fitting mechanism ) 是由 万秋里 王成恩 于 2021-10-14 设计创作，主要内容包括：一种具有推拔齿轮机构的自定心小口径弹药底火压装机构,包括：并列设置且相互啮合的若干底火压装单元以及与一个底火压装单元相连的驱动机构,其中：底火压装单元转动设置于固定底板上,驱动机构往复运动带动每个底火压装单元转动。本发明能够实现子弹自动装配过程中底火和弹壳的精准同轴定位,该发明机构同时限定压杆对弹壳、顶杆对底火的准确施力位置。本发明其结构简单可靠、效率高、实用性强。大大提高小口径弹药装配系统的稳定性和底火的压装精度。(A self-centering small caliber ammunition primer press-fit mechanism with a push-pull gear mechanism, comprising: a plurality of primer press mounting units arranged in parallel and meshed with each other and a driving mechanism connected with one primer press mounting unit, wherein: the primer press-fitting units are rotatably arranged on the fixed bottom plate, and the driving mechanism reciprocates to drive each primer press-fitting unit to rotate. The mechanism can realize accurate coaxial positioning of the primer and the cartridge case in the automatic bullet assembly process, and simultaneously limits the accurate force application positions of the compression rod to the cartridge case and the ejector rod to the primer. The invention has simple and reliable structure, high efficiency and strong practicability. The stability of the small-caliber ammunition assembly system and the press-fitting precision of the primer are greatly improved.)

1. The utility model provides a small-bore ammunition primer pressure equipment mechanism with it is from line-up gear from centering function which characterized in that includes: a plurality of primer press mounting units arranged in parallel and meshed with each other and a driving mechanism connected with one primer press mounting unit, wherein: the primer press-mounting units are rotationally arranged on the fixed bottom plate, and the driving mechanism reciprocates to drive each primer press-mounting unit to rotate;

the primer press-fitting unit comprises: the depression bar and the push rod that relative set up about set up in proper order in the outside mounting flange of push rod and push away and pull out the gear, wherein: one end of the shell case is sleeved at the tail end of the pressing rod, the other end of the shell case is arranged in the assembling flange, and the primer is arranged at the top end of the push rod.

2. The small-caliber ammunition primer press-fitting mechanism with the function of self-centering of the push-pull gear as claimed in claim 1, wherein the bottom of the pressure lever is provided with a taper and a step for shaping the cartridge case, and the step is a force application position of the pressure lever to the cartridge case during press-fitting of the pressure lever.

3. The small-caliber ammunition primer press-fitting mechanism with the function of self-centering of the push-pull gear according to claim 1, wherein the top of the push rod is provided with an inner fillet shape so as to ensure the accurate force application position of the push rod on the primer and avoid the risk that the primer explodes when the push rod is directly pressed to the middle position of the bottom of the primer.

4. The small-caliber ammunition primer press-fitting mechanism with the function of self-centering of the push-pull gear according to claim 1, wherein the adjacent two primer press-fitting units are engaged through the push-pull gear, and the push-pull gear of the first primer press-fitting unit, namely the head push-pull gear, is engaged with the driving mechanism.

5. The small-caliber ammunition primer press-fitting mechanism with the function of self-centering of the push-pull gear according to claim 1, characterized in that the assembly flange is made of metal with elasticity and comprises: the upper part of the boss is used for positioning the cage-type strip-shaped structure of the cartridge case, the lower part of the boss is used for positioning the boss, a through hole used for positioning the primer is arranged in the boss, and the ejector rod is in clearance fit with the through hole.

6. The small-caliber ammunition primer press-fitting mechanism with the self-centering function of the push-pull gear as claimed in claim 1, wherein the cage-shaped strip structure is provided with a conical surface on the outer portion, the push-pull gear is provided with a conical surface on the inner wall, the conical surface is matched with the conical surface of the cage-shaped strip structure on the upper portion of the mounting flange, when the push-pull gear and the mounting flange move relatively through threads, the push-pull gear moves downwards, and the inner conical surface presses the conical surface of the cage-shaped strip structure on the mounting flange so that the cage-shaped strip structure can be centered to hold the cartridge case tightly, thereby realizing the accurate centering, clamping and positioning function of the cartridge case.

7. The small-caliber ammunition primer press-fitting mechanism with the self-centering function of the push-pull gear as claimed in claim 1, wherein the outside of the assembling flange is provided with external threads, the inner wall of the push-pull gear is further provided with threads, the threads of the adjacent primer press-fitting units have opposite turning directions, and the external threads of the adjacent primer press-fitting units have opposite turning directions.

8. The small caliber ammunition primer press-fitting mechanism with the function of self-centering of the push-pull gear as claimed in claim 1, wherein the driving mechanism comprises: and the rack is engaged with a push-pull gear of the first primer press-fitting unit.

9. The small-caliber ammunition primer press-fitting mechanism with the function of self-centering of the push-pull gear according to claim 1, wherein the push-pull gear and the rack meshed with the push-pull gear are both made of die steel.

10. The small-caliber ammunition primer press-fitting mechanism with the self-centering function of the push-pull gear as claimed in claim 1, wherein the mounting flange is provided with a wrench face for adjusting the mounting angle of the mounting flange, the wrench face is used for clamping a wrench during adjusting the position angle of the mounting flange on the fixing base plate, and after the position adjustment is completed, the mounting flange is fixed through a set screw and a set threaded hole in the fixing base plate.

Technical Field

The invention relates to a technology in the field of small-caliber ammunition assembly, in particular to a self-centering small-caliber ammunition primer press-fitting mechanism with a gear push-pull mechanism.

Background

The small-caliber ammunition is national defense foundation combat readiness, and how to improve the assembly efficiency in the assembly process of the small-caliber bullet is suitable for the large-scale production requirement is one of the technical problems to be solved in the field. The existing small-caliber bullet automatic assembly technology has the difficult problems of: firstly, accurately positioning the primer and the cartridge case, and aiming at ensuring the coaxiality of the primer and the cartridge case to be convenient for accurate press mounting; and secondly, based on the requirement of the primer press-mounting process, the accurate force application position of the pressure lever to the cartridge case and the accurate force application position of the ejector rod to the primer need to be ensured.

Disclosure of Invention

Aiming at the key technical points in the prior art, the invention provides a self-centering small-caliber ammunition primer press-fitting mechanism with a gear push-pull mechanism, which can realize accurate coaxial positioning of primer and a cartridge case in the automatic bullet assembly process. The invention has simple and reliable structure, high efficiency and strong practicability. The stability of the small-caliber ammunition assembly system and the press-fitting precision of the primer are greatly improved.

The invention is realized by the following technical scheme:

the invention relates to a small-caliber ammunition primer press-fitting mechanism with a gear push-pull self-centering function, which comprises: a plurality of primer press mounting units arranged in parallel and meshed with each other and a driving mechanism connected with one primer press mounting unit, wherein: the primer press-fitting units are rotatably arranged on the fixed bottom plate, and the driving mechanism reciprocates to drive each primer press-fitting unit to rotate.

The primer press-fitting unit comprises: the depression bar and the push rod that relative set up about set up in proper order in the outside mounting flange of push rod and push away and pull out the gear, wherein: one end of the shell case is sleeved at the tail end of the pressing rod, the other end of the shell case is arranged in the assembling flange, and the primer is arranged at the top end of the push rod.

Technical effects

The invention integrally solves the following problems in the technical field of automatic assembly of small-caliber bullets at the present stage:

firstly, accurate positioning of primer and cartridge case is solved, and coaxiality of the primer and the cartridge case is ensured so as to facilitate accurate press mounting;

secondly, based on the primer press-mounting process requirement, accurate force application of the compression bar to the cartridge case and accurate force application of the ejector rod to the primer are solved from the force application position;

and thirdly, the precise and controllable pulling motion is ensured through the transmission of a gear and a rack, and through the simulation of a specific practical experiment, as shown in fig. 7 and 8, when the rack moves according to an input displacement function (input according to a certain trigonometric function), the meshed gear moves smoothly, the curve output of the angular displacement, the angular velocity and the angular acceleration also shows good movement performance, and the result is favorable for smoothly realizing the pulling motion.

Compared with the prior common shell case positioning process, two flat plates are generally adopted to perform centering linear motion, the positioning often has impact, and the motion is not smooth, so that the device can realize smooth shell case positioning motion and scientific stress through a rack and gear and assembly flange composite mechanism, and is shown in figures 7 and 8.

Drawings

FIGS. 1(a), (b) and (c) are a top view, a side sectional view and a perspective view of the overall mechanism of the present invention, respectively;

FIG. 2 is a detail view of the press-fitting process;

FIG. 3 is a detail view of the tapered gear;

FIG. 4 is a detail view of the mounting flange;

FIG. 5 is a view of a fixed baseplate;

FIG. 6 is a detail view of the mounting flange attachment;

FIG. 7 is a schematic diagram of a rack input displacement curve (local coordinates);

FIG. 8 is a schematic diagram of angular displacement, angular velocity, angular acceleration curves (local coordinates) of a gear;

in the figure: the automatic assembling device comprises a cylinder 1, a rack 2, a reset spring 3, a head-mounted push-pull gear 4, a pressure lever 5, a cartridge case 6, a primer 7, a push rod 8, a push-pull gear 9, an assembling flange 10, a fixing bottom plate 11, a set screw 12, a cage-type strip structure 13, a boss 14, a through hole 15, a pressure lever step 51, a pressure lever taper 52, a push rod fillet surface 81, an inner conical surface 91 of the push-pull gear, an inner thread 92 of the push-pull gear, a wrench surface 101, an assembling flange conical surface 102, an outer thread 103 of the assembling flange and a set thread hole 111.

Detailed Description

As shown in fig. 1, the present embodiment relates to a small caliber ammunition primer press-fitting mechanism with a self-centering function of a push-pull gear, which comprises: a plurality of primer press mounting units arranged in parallel and meshed with each other and a driving mechanism connected with one primer press mounting unit, wherein: the primer press-fitting units are rotatably arranged on the fixed bottom plate, and the driving mechanism reciprocates to drive each primer press-fitting unit to rotate.

The primer press-fitting unit comprises: the depression bar 5 and the push rod 8 that relative set up from top to bottom set up in proper order in the outside mounting flange 10 of push rod 8 and push away and pull out gear 9, wherein: one end of the cartridge case 6 is sleeved at the tail end of the compression bar 5, the other end of the cartridge case is arranged in the assembly flange 10, and the primer 7 is arranged at the top end of the push rod 8.

As shown in fig. 2, the bottom of the pressure lever 5 is provided with a taper 52 and a step 51 for shaping the cartridge case, and in the process of press-fitting the pressure lever, the step 51 is a position of the pressure lever for applying a force to the cartridge case 6.

The top of ejector pin 8 be equipped with interior fillet shape 81, effectively guarantee the accurate application of force position of ejector pin to the primer, this structure avoids the push rod to directly press the risk that the primer explodes to the primer bottom intermediate position probably caused.

The adjacent two primer press-fitting units are engaged through a push-pull gear 9, and the push-pull gear of the first primer press-fitting unit, namely the head push-pull gear 4, is engaged with the driving mechanism.

The push rod 8 penetrates through the fixed bottom plate.

As shown in fig. 4, the mounting flange 10 is made of a metal having elasticity, and the mounting flange 10 includes: a cage-type strip structure 13 positioned at the upper part and used for positioning the cartridge case, and a boss 14 positioned at the lower part, wherein a through hole 15 used for positioning the primer is arranged in the boss.

The ejector rod 8 is in clearance fit with the through hole 15.

The outer portion of the cage-type strip-shaped structure 13 is a conical surface 102, as shown in fig. 4, the inner wall of the push-pull gear 9 is correspondingly provided with a conical surface 91, the conical surface 91 is matched with the conical surface 102 of the cage-type strip-shaped structure on the upper portion of the mounting flange, when the push-pull gear and the mounting flange generate relative motion through threads, the push-pull gear moves downwards, the inner conical surface of the push-pull gear presses the conical surface of the cage-type strip-shaped structure on the upper portion of the mounting flange, and therefore the bullet shell is centered and tightly held by the cage-type strip-shaped structure, and coaxiality of the primer and the bullet shell is effectively guaranteed so as to facilitate accurate press mounting.

The outer part of the assembling flange 10 is provided with an external thread 103, as shown in fig. 4, the inner wall of the push gear 9 is further provided with a thread 92, the screwing directions of the threads 92 of the adjacent primer press-fitting units are opposite, and the screwing directions of the external thread 103 of the corresponding adjacent primer press-fitting units are also opposite.

The drive mechanism includes: a cylinder 1 with a return spring 3 or a motor-driven rack 2, the rack 2 being engaged with a push-pull gear 9 of the first primer press-fitting unit.

The tapered gear 9 and the rack 2 meshed with the tapered gear are both made of die steel such as 40Cr and the like, and the heat treatment mode adopts high-frequency quenching of the gear surface after quenching and tempering.

As shown in fig. 4, the mounting flange 10 has a wrench face 101 for adjusting the mounting angle thereof, and is used for clamping a wrench when adjusting the position angle of the mounting flange 10 on the fixing base plate 11. After the position adjustment is completed, the mounting flange 10 is fixed by the fastening screws 12 and the fastening threaded holes 111 on the fixing base plate.

As shown in fig. 1(c), the present apparatus performs primer press-fitting by: when the cylinder 1 is in a retraction state at an initial position, the reset spring 3 is released, the reset spring 3 drives the rack to move backwards, the first push-pull gear meshed with the rack moves to drive the push-pull gears meshed with each other to move, and the assembling flanges are fixed on the fixed bottom plate 11, and the push-pull gears are in threaded transmission connection with the assembling flanges meshed with each other, so that the first push-pull gear and all the push-pull gears move to the upper positions, the cage-type strip structures on the upper portions of all the assembling flanges 10 are opened, and thus, primer and cartridge cases can be sequentially placed into the assembling flanges 10.

As shown in fig. 1(c), the cylinder 1 extends to a proper position, the return spring 3 is compressed, the cylinder 1 drives the rack 2 to move forward to a proper position, the first push-pull gear engaged with the rack moves to drive the mutually engaged push-pull gears to move, as the assembling flange 10 is fixed on the fixed bottom plate 11, each push-pull gear 9 is in threaded transmission connection with the respectively engaged assembling flange 10, as a result, the first push-pull gear 4 and all the push-pull gears 9 move downward, the inner conical surface 91 presses the cage-shaped strip-shaped structure conical surface 102 on the assembling flange, and as a result, the cage-shaped strip-shaped structure is centered to tightly hold the cartridge case 6, and the accurate centering, clamping and positioning functions of the cartridge case 6 are realized.

Through specific practical experimental simulation, as shown in fig. 7 and 8, when the rack moves according to an input displacement function (input according to a certain trigonometric function), the motion of the meshing gear is smooth, the curve output of angular displacement, angular velocity and angular acceleration also shows good motion performance, and the result is favorable for smoothly realizing the pulling motion.

Compared with the prior art, the device has the advantages that the mechanism with the self-centering function is formed by the special assembly flange 10 and the push-pull gears 4 and 9, so that the coaxiality of primer and a cartridge case is effectively ensured, and the accurate press mounting is facilitated; the inner conical surface of the push-pull gear is matched with the conical surface of the cage-type strip structure on the upper part of the assembly flange, so that the accurate centering, clamping and positioning functions of the cartridge case are realized; the lower part of the pressing rod is provided with the taper and the step, so that the taper can play a role in shaping the cartridge case in the pressing process of the pressing rod, the accurate force application position of the pressing rod on the cartridge case can be effectively ensured to be arranged at the port of the cartridge case, and the deformation of the bottom of the cartridge case caused by the direct pressing of the pressing rod on the bottom of the cartridge case is avoided; the push rod with the inner fillet shape is processed at the top, so that the accurate force application position of the push rod on the primer is effectively ensured, and the risk that the primer explodes due to the fact that the push rod is directly pressed to the middle position of the bottom of the primer is avoided; the mechanism integrally realizes the driving and transmission functions through a gear set consisting of 10 mutually meshed pushing and pulling gears with self-centering function, a rack meshed with the head pushing and pulling gear, a rack return spring and a cylinder for driving the rack to move.

The foregoing embodiments may be modified in many different ways by those skilled in the art without departing from the spirit and scope of the invention, which is defined by the appended claims and all changes that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.