Closed chain link for conveying small-caliber shells

Abstract

In order to solve the problems of low reliability, large volume and weight and time consumption in assembly of the existing scheme for transmitting shells by adopting a chainless technology, the invention provides a closed chain link for transmitting small-caliber shells, which comprises a shell clamping groove, the n bullet clamping grooves are arranged in parallel and are sequentially connected to form a closed chain-shaped structure; one ends of every two adjacent bullet clamping grooves are connected through a bullet tip support, a connecting plate, a chain pin and a bearing, the other ends of every two adjacent bullet clamping grooves are connected through a bullet bottom support, a connecting plate, a chain pin and a bearing, and a bullet holding groove of a bullet position is formed; the connecting plate is a step dislocation type strip plate formed by sequentially arranging a first thin plate, a second thick plate and a third thin plate; the end heads of the first and third sections of thin plates are respectively used for connecting bullet tip supports or bullet bottom supports in the adjacent bullet holding grooves; the two sections of thick plates are used for being connected with the end parts of the bullet clamping grooves between the adjacent bullet holding grooves; bearings are installed on the bullet tip support and the bullet bottom support and used for enabling the bullet clamping grooves to roll, and bullet conveying is completed. And the chain pin is used for axially limiting the bearings and the connecting plates on the elastic tip support and the elastic bottom support. The device is simple in structure and high in reliability.

Description

Technical Field

[0001] The present invention relates to a closed chain link for transmitting small-caliber shells. The small-caliber shells described in the present invention refer to shells used for artillery with a caliber of less than 37 mm. Background Art

[0002] At present, the technologies used by weapons and equipment at home and abroad to transport artillery shells are mainly chain technology and chainless technology. Chain technology mainly presses the shells and chain links together; chainless technology mainly allows the shells and chain links to be easily separated, and the chain links can be used to repeatedly accommodate shells. Chain technology has been widely used, but it has disadvantages such as difficult chain processing, non-reusable, and complicated assembly. It can no longer meet the requirements for the supply of small-caliber, high-rate artillery.

[0003] Chainless technology has been more widely used at home and abroad, and has shown greater advantages in actual use. Chainless technology is divided into linear chainless technology, drum chainless technology and spiral chainless technology.

[0004] The patent document with application number 201318001070.5 and titled Bidirectional Linear Chainless Closed Belt discloses a typical bidirectional linear chainless closed belt technology. The main bullet container in this solution is a closed belt, which is linearly connected in series by a series of bullet-holding grooves and closed at both ends. The bullet-holding grooves are connected to the large chain plate and the small chain plate by welding, and can feed bullets for the automatic machine and receive the returned shells or shells in an orderly manner. The disadvantages of this solution are that the chain link machining is difficult, the assembly gap control is cumbersome, and the welding quality of the bullet-holding grooves and the large chain plate and the small chain plate is affected and limited by the workers' skill level, resulting in poor welding consistency and low reliability of the closed belt.

[0005] The main ammunition container in the drum-type chainless feeding technology is the drum. Due to the limitations of the ammunition storage method (the length of the bullet points to the center of the circle) and the transmission method (spiral), the drum is generally round and has a relatively large diameter, which makes the artillery system large in size, heavy in weight, and requires a relatively large installation space.

[0006] The patent document with application number 202118009252.1 and name Spiral Linear Chainless Ammunition Feed Device discloses a spiral linear chainless ammunition feeding technology. This solution can realize the arrangement of the ammunition chain in three-dimensional space. However, its disadvantage is that there are many parts and the assembly is time-consuming and labor-intensive. Summary of the invention

[0007] In order to solve the technical problems of low reliability, large size and weight, and time-consuming and labor-intensive assembly of the existing solution of transmitting artillery shells using chainless technology, the present invention provides a closed chain link for transmitting small-caliber artillery shells. The present invention adopts an embracing positioning method to store the artillery shells, and has a simple structure with few parts, and has the advantages of high reliability, small size, light weight and simple assembly.

[0008] The technical solution of the present invention is:

[0009] A closed chain link for transmitting small-caliber artillery shells, which is special in that it comprises a bullet-catching groove, a bullet tip support, a bullet base support, a connecting plate, a chain pin and a bearing;

[0010] There are n bullet retaining grooves arranged in parallel and connected in sequence to form a closed chain structure; one end of two adjacent bullet retaining grooves is connected in a linked manner using the bullet tip support, connecting plate, chain pin and bearing, and the other end is connected in a linked manner using the bullet base support, connecting plate, chain pin and bearing to form a bullet retaining groove for one bullet position, and the cavity of the bullet retaining groove is adapted to the shape and size of the shell to be loaded; the n bullet retaining grooves form a total of n-1 bullet retaining grooves;

[0011] The connecting plate is a step-displaced long strip plate formed by sequentially arranging a thin plate, two thick plates and three thin plates, and the ends of the thin plate and the three thin plates are both semicircular ends; the thin plate and the three thin plates are respectively used to connect the bullet tip support or the bullet bottom support in the adjacent bullet holding grooves, and the two thick plates are used to connect the ends of the bullet holding grooves between the adjacent bullet holding grooves;

[0012] The bearing is installed on each of the bullet tip support and the bullet base support, and is used to make the bullet slot roll to complete the bullet feeding action;

[0013] The chain pin is used to axially limit the bearing and the connecting plate on the bullet tip support and the bullet base support on the bullet tip support and the bullet base support.

[0014] Furthermore, the spring tip support is a three-step columnar stepped shaft, and a first chain pin mounting through hole for mounting the chain pin is provided in the middle of the shaft end; the first-step shaft of the spring tip support is used to mount the bearing, the second-step shaft is used to mount the connecting plate, and the third-step shaft is used to limit the connection plate to prevent forward and backward movement.

[0015] Furthermore, the shell base support is a four-step disc-shaped stepped shaft, and a second chain pin mounting through hole for mounting the chain pin is provided in the middle of the shaft end; the first-step shaft of the shell base support is used to mount the bearing, the second-step shaft is used to mount the connecting plate, the third-step shaft is used to limit the connecting plate to prevent the connecting plate from moving forward and backward, and the end face of the fourth-step shaft is used to limit the bottom of the projectile, and a concave clearance platform is provided in the middle of the end face of the fourth-step shaft to ensure that it does not contact the shell primer.

[0016] Furthermore, the bullet holding slot includes a left bullet bottom plate, a right bullet bottom plate, a left positioning block and a right positioning block; the left bullet bottom plate is connected to the right bullet bottom plate in parallel, and the left positioning block and the right positioning block are respectively arranged on the left and right sides of the combination formed by the left bullet bottom plate and the right bullet bottom plate; the left positioning block in one bullet holding slot and the right positioning block in the adjacent bullet holding slot are used together to hold the shells.

[0017] Furthermore, the left bullet bottom plate is in the shape of an elongated strip as a whole. When viewed from the width direction, the middle part of the left bullet bottom plate is a trumpet-shaped groove whose opening size gradually decreases from the top of the groove to the bottom of the groove; the trumpet-shaped groove includes a middle flat plate and inclined plates located on both sides of the middle flat plate, and the inclined plates close to the bottom end of the bullet can be used to position the shells; a plurality of mounting holes are arranged at intervals on the middle flat plate, among which the mounting holes located in the middle serve as the mounting interface between the left bullet bottom plate and the left positioning block, and the remaining mounting holes serve as the mounting interface between the left bullet bottom plate and the right bullet bottom plate; a bending structure extending and bending toward the outside of the trumpet-shaped groove is also provided at the top of the trumpet-shaped groove; in the length direction, both ends of the trumpet-shaped groove are provided with ears for connecting with the connecting plate, and the ears are bent toward the notch direction of the trumpet-shaped groove; a first clearance gap is also provided on the upper and lower sides of the left bullet bottom plate for performing a toggling operation on the shells in a closed loop;

[0018] The right elastic bottom plate is a mirror-symmetrical piece of the left elastic bottom plate;

[0019] The right elastic bottom plate and the left elastic bottom plate are arranged with their groove bottoms facing each other, and the middle flat plates of the trumpet-shaped grooves of the two are connected by riveting.

[0020] Furthermore, the first clearance gap located on the upper side extends from the bending structure at the upper groove top to the middle of the middle plate, and the first clearance gap located on the lower side extends from the bending structure at the lower groove top to the middle of the middle plate.

[0021] Furthermore, the first clearance gap is a U-shaped gap.

[0022] Further, the left positioning block is an arc-shaped bent plate, and a second clearance notch is provided in the middle of the upper part of the arc-shaped bent plate; the middle part of the outer wall of the arc-shaped bent plate is a horizontal plane, and the upper and lower sides of the horizontal plane are inclined planes; the horizontal plane matches the middle flat plate of the trumpet-shaped groove on the left bullet bottom plate, and the angles of the inclined planes on both sides are greater than the angles of the inclined plates of the trumpet-shaped groove on the left bullet bottom plate; the inner side wall of the arc-shaped bent plate is an arc surface, which is used to match with the shell; there is an inclined shoulder at the front end of the arc surface, which is used to limit the forward and backward movement of the shell; the inner side wall of the arc-shaped bent plate is also provided with a step through hole, which serves as the mounting interface between the left positioning block and the left bullet bottom plate; the second clearance notch on the upper part of the left positioning block corresponds to and matches the first clearance notch in the middle part of the upper side of the left bullet bottom plate, and is used to make way for the shell;

[0023] The right positioning block is a mirror-symmetrical piece of the left positioning block.

[0024] Furthermore, the thickness of one thin plate section and three thin plates of the connecting plate is equal, and the thickness of the two thick plates is equal to the sum of the thickness of the one thin plate section and the two thin plates section.

[0025] Furthermore, working recesses are respectively provided at the semicircular ends of the connecting plates, and the planes of the working recesses on both ends are on the same horizontal plane. The lengths of the working recesses on both ends are greater than the diameters of the semicircular ends, so that the two connecting plates can be rotated freely after being staggered and installed without interference.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The present invention can realize bidirectional linear transmission of shells. When rotating forward, it can supply shells to the automatic machine, and when rotating reversely, it can remove unfired shells.

[0028] 2. The present invention utilizes inclined plates and positioning blocks to implement embracing positioning of artillery shells, which can realize reliable positioning of artillery shells in the shell box and random arrangement of closed chain links. It has a simple structure, a small number of parts, is easy to assemble and use, and reduces the energy consumption of artillery.

[0029] 3. The main parts of the present invention are castings and stampings, which are small in size, light in weight, simple to process, and suitable for mass production at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of an embodiment of a closed chain link for transmitting small-caliber shells according to the present invention.

[0031] Figure 2 It is a structural schematic diagram of the combined bullet-binding slot, wherein FIG a) is a front view, FIG b) is a top view, and FIG c) is a right view.

[0032] Figure 3 It is a schematic diagram of the structure of the left-moving film.

[0033] Figure 4 It is a schematic diagram of the structure of the right film.

[0034] Figure 5 It is a schematic diagram of the installation of the bullet tip support. Among them, Figure a) is a schematic diagram of the bullet tip support structure, Figure b) is a schematic diagram of the assembly of the bullet tip support, and Figure c) is a schematic diagram of the installation of the two connecting plates at the bullet tip support.

[0035] Figure 6 It is a schematic diagram of the installation of the base support. Among them, Figure a) is a schematic diagram of the structure of the base support, Figure b) is a schematic diagram of the assembly of the base support, and Figure c) is a schematic diagram of the installation of the two connecting plates at the base support.

[0036] Figure 7 It is a structural diagram of the left positioning block.

[0037] Figure 8 It is a structural diagram of the right positioning block.

[0038] Fig. 9 It is a schematic diagram of the structure of the chain pin.

[0039] Fig.10 It is a structural diagram of the connecting plate.

[0040] Fig.11 It is a usage state diagram of an embodiment of a closed chain link for transmitting small-caliber artillery shells according to the present invention.

[0041] Figure numerals: 1-left elastic bottom plate, 101-trumpet-shaped groove, 1011-middle flat plate, 1012-inclined plate, 1013-mounting hole, 102-bending structure, 103-ear, 104-first yielding notch, 2-right elastic bottom plate, 3-elastic tip support, 301-first step axis, 302-second step axis, 303-third step axis, 304-first chain pin mounting through hole, 4-elastic bottom support, 401-first step axis, 402-second step axis, 403-third step axis , 404-fourth-step shaft, 405-second chain pin mounting through hole, 406-yield platform, 5-left positioning block, 501-horizontal plane, 502-inclined plane, 503-arc surface, 504-step through hole, 505-second yielding notch, 506-oblique shoulder, 6-right positioning block, 7-connecting plate, 701-working concave table, 702-mounting shaft hole, 703-long rivet mounting hole, 8-chain pin, 9-bearing, 10-long rivet, 11-short rivet, 12-sprocket. DETAILED DESCRIPTION

[0042] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Reference Figure 1 The closed chain link for transmitting small-caliber artillery shells provided in this embodiment includes a bullet-catching groove, a bullet tip support 3, a bullet base support 4, a connecting plate 7, a chain pin 8, a bearing 9, a long rivet 10 and a short rivet 11.

[0044] Reference Figure 2-Figure 4 The bullet-holding slot includes a left bullet bottom sheet 1, a right bullet bottom sheet 2, a left positioning block 5 and a right positioning block 6. The left bullet bottom sheet 1 and the right bullet bottom sheet 2 are parallelly connected, and the left positioning block 5 and the right positioning block 6 are respectively arranged on the left and right sides of the assembly formed by connecting the left bullet bottom sheet 1 and the right bullet bottom sheet 2. The shape of the bullet-holding slot is like an elongated "X" when viewed longitudinally and like a "butterfly" when viewed laterally.

[0045] Reference Figure 3The left bullet bottom sheet 1 is in the shape of an elongated strip as a whole. From the width direction, the middle part of the left bullet bottom sheet 1 is a trumpet-shaped groove 101 whose opening size gradually decreases from the top to the bottom of the groove; the trumpet-shaped groove 101 includes a middle flat plate 1011 and inclined plates 1012 located on both sides of the middle flat plate, and the inclined plate 1012 near the bottom end of the shell can be used to position the shell; a plurality of mounting holes 1013 are arranged at intervals on the middle flat plate 1011, among which the mounting hole 1013 located in the middle serves as the mounting interface between the left bullet bottom sheet 1 and the left positioning block 5, and the remaining mounting holes 1013 serve as the mounting interface between the left bullet bottom sheet 1 and the right bullet bottom sheet 2; a bending structure 102 extending and bending toward the outside of the trumpet-shaped groove 101 is also provided at the top of the trumpet-shaped groove 101; in the length direction, both ends of the trumpet-shaped groove 101 are provided with ears 103 for connecting with the connecting plate 7, and the ears 103 are bent toward the notch direction of the trumpet-shaped groove 101. In addition, first clearance notches 104 are provided on the upper and lower sides of the left shell bottom plate 1 for performing a toggling operation on the shells in a closed loop; the first clearance notch 104 on the upper side extends from the bending structure 102 at the top of the upper groove to the middle of the middle plate 1011, and the first clearance notch 104 on the lower side extends from the bending structure 102 at the top of the lower groove to the middle of the middle plate 1011; the first clearance notch 104 in the present embodiment is a U-shaped notch, and there are two clearance notches on the upper side and one clearance notch on the lower side, and the depth and length of these three clearance notches are the same.

[0046] Reference Figure 4 and Figure 2 The right elastic film 2 is a mirror-symmetrical part of the left elastic film 1.

[0047] Reference Figure 7 The left positioning block 5 is an arc-shaped curved plate, and a second clearance notch 505 is provided in the middle of the upper part of the arc-shaped curved plate. The middle part of the outer wall of the left positioning block 5 is a horizontal plane 501, and the upper and lower sides of the horizontal plane 501 are inclined planes 502. The horizontal plane 501 matches with the middle flat plate 1011 of the trumpet-shaped groove 101 on the left bullet negative film 1, and the angles of the inclined planes 502 on both sides are greater than the angles of the inclined plates 1012 of the trumpet-shaped groove 101 on the left bullet negative film 1. The inner wall of the left positioning block 5 is an arc surface 503, which is used to cooperate with the shell; there is an inclined shoulder 506 at the front end of the arc surface 503, which is used to limit the forward and backward movement of the shell. The inner wall of the left positioning block 5 is provided with a step through hole 504, which serves as the installation interface between the left positioning block 5 and the left bullet negative film 1. The second clearance notch 505 on the upper part of the left positioning block 5 corresponds to the first clearance notch 104 on the middle part of the upper side of the left shell bottom plate 1, and is used to make way for the shells. The second clearance notch 505 matches the shape and size of the corresponding first clearance notch 104. In this embodiment, the second clearance notch 505 is a U-shaped notch.

[0048] Reference Figure 8The right positioning block 6 is a mirror-symmetrical part of the left positioning block 5.

[0049] Reference Figure 2 The left elastic bottom plate 1 and the right elastic bottom plate 2 are arranged with the bottom of the groove facing each other. The middle plate 1011 of the trumpet-shaped groove 101 of the left elastic bottom plate 1 is connected with the middle plate of the trumpet-shaped groove of the right elastic bottom plate 2 at the mounting hole 1013 by a short rivet 11. After the connection, it is necessary to expand and rivet, and no axial string momentum is allowed. The left positioning block 5 and the right positioning block 6 are respectively arranged on both sides of the left elastic negative plate 1 and the right elastic negative plate 2 assembly, and are located in the middle position of the left elastic negative plate 1 and the right elastic negative plate 2 assembly in the longitudinal direction; the left positioning block 5 and the right positioning block 6 are respectively fixed at the mounting hole 1013 in the middle of the corresponding elastic negative plate by long rivets 10, the horizontal surface 501 in the middle of the outer wall of the left positioning block 5 is fitted and docked with the middle flat plate 1011 of the left elastic negative plate 1, the horizontal surface in the middle of the outer wall of the right positioning block 6 is fitted and docked with the middle flat plate of the right elastic negative plate 2, the second clearance notch 505 on the left positioning block 5 is basically aligned with the first clearance notch 104 in the middle of the upper side of the left elastic negative plate 1, and the second clearance notch on the right positioning block 6 is basically aligned with the first clearance notch in the middle of the upper side of the right elastic negative plate 2. Similarly, it is necessary to expand and rivet after the left positioning block 5 is connected to the left elastic negative plate 1 and the right positioning block 6 is connected to the right elastic negative plate 2, and axial stringing momentum is not allowed.

[0050] Reference Figure 1 There are n bullet retaining grooves, and these n bullet retaining grooves are arranged in parallel; one end of two adjacent bullet retaining grooves is connected in a linked manner by a connecting plate 7, a bullet tip support 3, a bearing 9 and a chain pin 8, and the other end is connected in a linked manner by a connecting plate 7, a bullet base support 4, a bearing 9 and a chain pin 8, and finally the n bullet retaining grooves are connected in sequence into a closed chain structure (the chain distance t depends on the distance between the mounting shaft holes at the two semicircular ends of the connecting plate 7), and two adjacent bullet retaining grooves can form a bullet holding groove for a bullet position, that is, a bullet holding groove that can just accommodate one shell is formed, and the n bullet retaining grooves form a total of n-1 bullet holding grooves, and the shape and size of the bullet holding groove are adapted to the external structure and size of the shell to be loaded, and each bullet holding groove has a bullet tip support 3 and a bullet base support 4; the area near the bullet tip support 3 in the bullet holding groove is the bullet head accommodating end, and the area near the bullet base support 4 is the bullet base accommodating end. The hole formed by the arc surface 503 on the inner side of the left positioning block 5 in one bullet-holding groove and the arc surface on the inner side of the right positioning block 6 in the adjacent bullet-holding groove is adapted to the external dimensions of the shell at that location. The shell is axially limited by the oblique shoulder 506 on the left positioning block 5 and the oblique shoulder on the right positioning block 6, and the shell is reliably positioned in cooperation with the shell base 4.

[0051] Reference Figure 5The bullet tip support 3 is a three-step columnar stepped shaft, and a first chain pin installation through hole 304 is provided in the middle of the shaft end. The first step shaft 301 is used to install the bearing 9, the second step shaft 302 is used to install the connecting plate 7, and the third step shaft 303 is used to limit the position to prevent the connecting plate 7 from moving forward and backward. During installation, the two bullet-catching grooves are arranged horizontally, and the connecting holes of the two connecting plates 7 are aligned and installed at the second step shaft 302 of the bullet tip support 3, and then the bearing 9 is installed at the first step shaft 301 of the bullet tip support 3, and finally the chain pin 8 is installed from the end of the first step shaft 301 into the first chain pin installation through hole 304, and the expanded rivet hole on the chain pin 8 is expanded and riveted to ensure that no axial movement occurs.

[0052] Reference Figure 6 The shell base support 4 is a four-step disc-shaped stepped shaft, and a second chain pin installation through hole 405 is provided in the middle of the shaft end. The first-step shaft 401 is used to install the bearing 9, the second-step shaft 402 is used to install the connecting plate 7, the third-step shaft 403 is used to limit the connection plate 7 to prevent the front and rear movement, and the end face of the fourth-step shaft 404 is used to limit the bottom of the projectile, and a concave clearance platform 406 is provided in the middle of the end face of the fourth-step shaft 404 to ensure that it does not contact the shell primer. During installation, the two bullet-holding grooves are arranged horizontally, and the connecting holes of the two connecting plates 7 are aligned and installed at the second-step shaft 402 of the shell base support 4, and then the bearing 9 is installed at the first-step shaft 401 of the shell base support 4, and finally the chain pin 8 is installed from the end of the first-step shaft 401 to the second chain pin installation through hole 405, and the expanded rivet hole on the chain pin 8 is expanded and riveted to ensure that no axial movement occurs.

[0053] Reference Fig.10The connecting plate 7 is a step-displaced long strip plate formed by sequentially arranging one thin plate, two thick plates and three thin plates, and the two ends of the connecting plate 7 are semicircular; the one thin plate and the three thin plates are respectively used to connect the bullet tip support or the bullet base support in the adjacent bullet holding grooves, and the two thick plates are used to connect with the ends of the bullet-holding grooves between the adjacent bullet holding grooves. The one thin plate and the three thin plates are of equal thickness, and the thickness of the two thick plates is equal to the sum of the thickness of the one thin plate and the two thin plates. Working recesses 701 are respectively provided at the semicircular ends, and the planes of the working recesses 701 on the two ends are on the same horizontal plane. The lengths of the working recesses 701 on the two ends should be greater than the diameter at the semicircular ends, so that the two connecting plates can be rotated at will after being displaced and installed without interference. The semicircular ends are also provided with a mounting shaft hole 702 for cooperating with the bullet base support 4 or the bullet tip support 3. The two thick plates of the connecting plate 7 are provided with stepped long rivet mounting holes 703 matching the lugs 103 on the left elastic bottom plate 1 and the lugs on the right elastic bottom plate 2. The long rivet mounting holes 703 serve as mounting interfaces between the connecting plate 7 and the left elastic bottom plate 1 and the right elastic bottom plate 2. When assembling the bullet-catching groove formed by the connecting plate 7 and the left elastic bottom plate 1 and the right elastic bottom plate 2, align the long rivet mounting holes 703 on the two thick plates of the connecting plate 7 with the mounting holes of the lugs on the bullet-catching groove, and then insert the long rivets 10 therein, and then expand and rivet after connection to prevent axial movement. For ease of operation, the conical mounting holes on the connecting plate 7 for expansion and rivet are facing outward.

[0054] Reference Figure 5 , Fig. 9 The chain pin 8 is a semi-hollow shaft with a flat head shape, the hollow end of which is used to be fixed to the base support 4 or the tip support 3 by expansion and riveting, and the end face of the flat head end is used to fix the inner ring of the bearing 9.

[0055] The bearing 9 is a standard part, and a deep groove ball bearing with dust covers at both ends can be used. A bearing 9 is installed at the bullet base support 4 and the bullet tip support 3 corresponding to a bullet holding groove to make the bullet holding groove roll and complete the bullet feeding action.

[0056] The principle and working process of using the present invention to transmit shells are as follows:

[0057] Reference Figure 2 , connect the left bullet bottom plate 1, the right bullet bottom plate 2, the left positioning block 5 and the right positioning block 6 in sequence through long rivets 10 and short rivets 11 to form a bullet-locking groove, and connect the bullet-locking groove with the connecting plate 7 through long rivets 10 on both sides. In this way, n bullet-locking grooves are assembled. Arrange the n bullet-locking grooves in sequence, and refer to the Figure 5 , Figure 6 Connect n bullet-binding slots and finally connect them end to end to form a closed chain link.

[0058] Reference Fig.11When working, the sprocket wheel 12 is arranged at the turning point of the chain link in the present invention, and the bearings 9 on both sides of the chain link can be moved by the driving mechanism to drive the sprocket wheel 12 to rotate, so as to realize the movement of the entire closed chain link and the reliable transmission of the shells. The sprocket wheel 12 and the corresponding driving mechanism are both existing mature units.

Claims

1. A closed chain link for transmitting small-caliber shells, characterized in that: It includes a bullet slot, a bullet tip support, a bullet base support, a connecting plate, a chain pin and a bearing; There are n bullet retaining grooves arranged in parallel and connected in sequence to form a closed chain structure; one end of two adjacent bullet retaining grooves is connected in a linked manner using the bullet tip support, connecting plate, chain pin and bearing, and the other end is connected in a linked manner using the bullet base support, connecting plate, chain pin and bearing to form a bullet retaining groove for one bullet position, and the cavity of the bullet retaining groove is adapted to the shape and size of the shell to be loaded; the n bullet retaining grooves form a total of n-1 bullet retaining grooves; The connecting plate is a step-displaced long strip plate formed by sequentially arranging a thin plate, two thick plates and three thin plates, and the ends of the thin plate and the three thin plates are both semicircular ends; the thin plate and the three thin plates are respectively used to connect the bullet tip support or the bullet bottom support in the adjacent bullet holding grooves, and the two thick plates are used to connect the ends of the bullet holding grooves between the adjacent bullet holding grooves; The bearing is installed on each of the bullet tip support and the bullet base support, and is used to make the bullet slot roll to complete the bullet feeding action; The chain pin is used to axially limit the bearing and the connecting plate on the bullet tip support and the bullet base support on the bullet tip support and the bullet base support.

2. The closed chain link for transmitting small-caliber artillery shells according to claim 1, characterized in that: The spring tip support is a three-step columnar stepped shaft, and a first chain pin mounting through hole for mounting the chain pin is provided in the middle of the shaft end; the first step shaft of the spring tip support is used for mounting the bearing, the second step shaft is used for mounting the connecting plate, and the third step shaft is used for limiting to prevent the connecting plate from moving forward and backward.

3. The closed chain link for small-caliber artillery shell transmission according to claim 1 is characterized in that: The shell base support is a four-step disc-shaped stepped shaft, and a second chain pin mounting through hole for mounting the chain pin is provided in the middle of the shaft end; the first-step shaft of the shell base support is used to mount the bearing, the second-step shaft is used to mount the connecting plate, the third-step shaft is used to limit the connection plate to prevent the connecting plate from moving forward and backward, and the end face of the fourth-step shaft is used to limit the bottom of the projectile, and a concave clearance platform is provided in the middle of the end face of the fourth-step shaft to ensure that it does not contact the shell primer.

4. The closed chain link for transmitting small-caliber shells according to any one of claims 1 to 3, characterized in that: The bullet-holding slot comprises a left bullet bottom plate, a right bullet bottom plate, a left positioning block and a right positioning block; the left bullet bottom plate is parallel to the right bullet bottom plate and is connected with the left bullet bottom plate, and the left positioning block and the right positioning block are respectively arranged on the left and right sides of a combination formed by connecting the left bullet bottom plate and the right bullet bottom plate; the left positioning block in one bullet-holding slot and the right positioning block in the adjacent bullet-holding slot are used together to hold the shells.

5. The closed chain link for transporting small-caliber artillery shells according to claim 4, characterized in that: The left bullet bottom plate is in the shape of an elongated strip as a whole. When viewed from the width direction, the middle part of the left bullet bottom plate is a trumpet-shaped groove whose opening size gradually decreases from the top of the groove to the bottom of the groove; the trumpet-shaped groove includes a middle flat plate and inclined plates located on both sides of the middle flat plate, and the inclined plates close to the bottom end of the bullet can be used to position the shells; a plurality of mounting holes are arranged at intervals on the middle flat plate, among which the mounting holes located in the middle serve as the mounting interface between the left bullet bottom plate and the left positioning block, and the remaining mounting holes serve as the mounting interface between the left bullet bottom plate and the right bullet bottom plate; a bending structure extending and bending toward the outside of the trumpet-shaped groove is also provided at the top of the trumpet-shaped groove; in the length direction, both ends of the trumpet-shaped groove are provided with ears for connecting with the connecting plate, and the ears are bent toward the notch direction of the trumpet-shaped groove; a first clearance gap is also provided on the upper and lower sides of the left bullet bottom plate for performing a toggling operation on the shells in a closed loop; The right elastic bottom plate is a mirror-symmetrical piece of the left elastic bottom plate; The right elastic bottom plate and the left elastic bottom plate are arranged with their groove bottoms facing each other, and the middle flat plates of the trumpet-shaped grooves of the two are connected by riveting.

6. The closed link for transporting small-caliber artillery shells according to claim 5, characterized in that: The first clearance gap located on the upper side extends from the bending structure at the upper groove top to the middle of the middle plate, and the first clearance gap located on the lower side extends from the bending structure at the lower groove top to the middle of the middle plate.

7. The closed link for transporting small-caliber artillery shells according to claim 6, characterized in that: The first clearance gap is a U-shaped gap.

8. The closed chain link for transporting small-caliber artillery shells according to claim 4, characterized in that: The left positioning block is an arc-shaped bent plate, and a second clearance notch is provided in the middle of the upper part of the arc-shaped bent plate; the middle part of the outer wall of the arc-shaped bent plate is a horizontal plane, and the upper and lower sides of the horizontal plane are inclined planes; the horizontal plane matches the middle flat plate of the trumpet-shaped groove on the left bullet bottom plate, and the angles of the inclined planes on both sides are greater than the angles of the inclined plates of the trumpet-shaped groove on the left bullet bottom plate; the inner side wall of the arc-shaped bent plate is an arc surface, which is used to match with the shell; there is an inclined shoulder at the front end of the arc surface, which is used to limit the forward and backward movement of the shell; the inner side wall of the arc-shaped bent plate is also provided with a step through hole, which serves as the mounting interface between the left positioning block and the left bullet bottom plate; the second clearance notch on the upper part of the left positioning block corresponds to and matches the first clearance notch in the middle part of the upper side of the left bullet bottom plate, which is used to make way for the shell; The right positioning block is a mirror-symmetrical piece of the left positioning block.

9. The closed link for transporting small-caliber artillery shells according to claim 1, characterized in that: The thickness of one thin plate section and three thin plates of the connecting plate is equal, and the thickness of the two thick plates is equal to the sum of the thickness of the one thin plate section and the two thin plates section.

10. The closed link for transporting small-caliber artillery shells according to claim 9, characterized in that: Working recesses are respectively provided at the semicircular ends of the connecting plates, and the planes of the working recesses at both ends are on the same horizontal plane. The lengths of the working recesses at both ends are greater than the diameters of the semicircular ends, so that the two connecting plates can be rotated freely after being installed in an offset manner without interference.

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