Rapidly detachable and foldable crank of hand-cranking ammunition feeding device

Abstract

The utility model provides a crank of a hand-cranking ammunition feeding device, which can be quickly detached and folded and comprises a connecting arm, a first matching part and a second matching part are respectively arranged at two ends of the connecting arm, and the first matching part is detachably mounted on the hand-cranking ammunition feeding device; a chuck base is fixed to the second matching part, a clamping disc is clamped to the chuck base, a foldable handle is installed in the center of the clamping disc, and the foldable handle drives the second matching part to rotate around the center of the first matching part. The whole crank is detachably installed on the hand-cranking ammunition supply device through the spline groove of the first matching part, so that the whole crank is convenient to disassemble and assemble, meanwhile, the space occupied by the crank is further reduced through the design of the foldable handle, personnel can conveniently operate or maintain in a turret, and the working efficiency is improved. The foldable handle is clamped on the chuck base through the clamping disc, and falling of the foldable handle caused by vibration can be avoided by means of the elastic structure of the spring stop pin, so that the crank has high stability and detachability.

Description

Technical Field

[0001] The utility model relates to the field of combat equipment, and particularly relates to a crank for a hand-operated ammunition feeding device that can be quickly disassembled and folded. Background Art

[0002] Artillery has been widely used and developed in modern combat. Ammunition loading is an essential link in combat. The speed and accuracy of loading ammunition are important factors determining the outcome of a war. Traditional ammunition loading is carried out manually by hand. With the development of technology, automated methods have also been added to ammunition loading.

[0003] In certain specific situations, such as in a turret, ammunition loading often chooses to use the method of hand-cranked ammunition feeding. However, due to the limited space inside the turret itself, the installation of a hand-cranked ammunition feeding device will limit the movement space of personnel and is not convenient for personnel maintenance. Therefore, it is crucial to design a crank that can reduce the space occupied by the hand-cranked ammunition feeding device. Summary of the Utility Model

[0004] Aiming at the problems in the prior art that the hand-cranked ammunition feeding device occupies a large space and is not convenient for personnel operation, use and maintenance, the utility model proposes a crank for a hand-operated ammunition feeding device that can be quickly disassembled and folded.

[0005] The present application proposes a crank for a hand-operated ammunition feeding device that can be quickly disassembled and folded, including a connecting arm. The two ends of the connecting arm are respectively provided with a first fitting part and a second fitting part. The first fitting part is detachably installed on the hand-operated ammunition feeding device; a chuck base is fixed on the second fitting part, and a chuck plate is clamped on the chuck base. A foldable handle is installed at the center of the chuck plate, and the foldable handle drives the second fitting part to rotate around the center of the first fitting part.

[0006] By adopting the above technical solution, the whole crank is detachably matched with the hand-operated ammunition feeding device through the first fitting part. At the same time, the cooperation between the chuck plate and the chuck base enables the chuck plate to be quickly disassembled. The staff can open and shake the foldable handle, and then drive the second fitting part to rotate around the first fitting part through the chuck base to realize the shaking of the hand-operated ammunition feeding device. This structural design can withstand multiple disassembly, assembly and folding, enhancing the durability and reliability of the device and being conducive to long-term use and maintenance.

[0007] In some specific embodiments, the foldable handle includes a mounting base. The mounting base is matched with the center of the chuck plate through bolts. A convex hollow frustum is also provided at the center of the mounting base. An oscillating arm extends from the outer side of the hollow frustum, and a grip is rotatably arranged at the end of the oscillating arm.

[0008] By adopting the above technical solution, the mounting base is closely fitted with the center of the clamping disc through bolts, ensuring the firmness of the connection, preventing loosening or detachment. The convex hollow frustum structure design optimizes the torque transmission path. Combined with the use of the swing arm, it can more effectively transmit the operating force, improving the working efficiency of the ammunition feeding device. The grip is designed as a foldable structure, which can be folded when not in use, reducing the occupied space of the device and enhancing portability, making it particularly suitable for application scenarios that require frequent movement or have limited storage space.

[0009] In some specific embodiments, a vertical connecting portion is provided at the end of the swing arm, and the grip is rotatably connected to the connecting portion through a pin shaft.

[0010] By adopting the above technical solution, by using the connecting portion perpendicular to the end of the swing arm, the grip can be closely attached to the swing arm after folding, further saving the occupied space of the foldable handle. Through the pin shaft connection, the grip can rotate freely within a certain range, allowing the user to adjust the grip angle according to different operating requirements and postures, providing greater operating flexibility and adaptability.

[0011] In some specific embodiments, the clamping disc includes a first fixed seat in the middle and clamping claws arranged equidistantly around the first fixed seat.

[0012] By adopting the above technical solution, the clamping claws arranged equidistantly can provide sufficient support for the cooperation between the clamping disc and the chuck base, evenly distributing the stress points and ensuring the stability of the cooperation. The equidistant design of the clamping claws can also avoid the offset problem during the installation process, thereby improving the assembly accuracy and efficiency.

[0013] In some specific embodiments, the chuck base includes a second fixed seat in the middle. Around the second fixed seat, there are clamping portions corresponding to the positions of the clamping claws. The second fixed seat is bolted to the second mating portion, and the clamping claws are inserted into the grooves of the clamping portions.

[0014] By adopting the above technical solution, the provision of the clamping portions facilitates the quick installation of the clamping disc, ensuring that the clamping claws can accurately be inserted into the grooves of the clamping portions to achieve precise positioning. The bolt and clamping method reduces the complexity of installation and is more conducive to installation, maintenance, and servicing.

[0015] In some specific embodiments, a retaining pin groove is formed on the side of the clamping portion facing the foldable handle, and a spring retaining pin passes through the retaining pin groove and abuts against the side of the clamping claw.

[0016] By adopting the above technical solution, with the design of the retaining nail groove and the spring retaining nail, the claw can be more firmly fixed within the clamping portion, avoiding loosening or detachment caused by vibration or external force during use, thereby improving the safety of operation. The spring retaining nail can automatically reset under the action of the spring, enabling the claw to maintain a stable state within the clamping portion.

[0017] In some specific embodiments, the claw is L-shaped, and the end of the spring retaining nail abuts against the side surface of the bent portion of the claw.

[0018] By adopting the above technical solution, the L-shaped claw provides two contact surfaces. The combination with the spring retaining nail can form a more stable support point at the bent portion, providing a larger contact area. Through the lateral support of the spring retaining nail, a greater fastening force can be applied, enhancing the overall fixing effect between the claw and the clamping portion and reducing the risk of loosening.

[0019] In some specific embodiments, the spring retaining nail includes a retaining nail head, a spring portion, and a limiting portion. The retaining nail head and the spring portion are placed in the retaining nail groove, and the end of the limiting portion protrudes from the hole position on the bottom surface of the retaining nail groove.

[0020] By adopting the above technical solution, the design of the limiting portion enables the spring retaining nail to maintain a stable position within the retaining nail groove, avoiding displacement of the spring retaining nail due to external force. The elastic force provided by the spring portion enables the limiting portion to automatically adjust according to the position of the claw, ensuring stable support and positioning even when the claw moves or is impacted.

[0021] In some specific embodiments, a limiting ring is further provided around the connection between the limiting portion and the spring portion, and the limiting ring abuts against the inner bottom surface of the retaining nail groove.

[0022] By adopting the above technical solution, the design of the limiting ring defines the installation depth and position of the spring retaining nail, making it easier to position during installation, improving the assembly efficiency, effectively restricting the up and down movement of the spring retaining nail, and enabling the spring retaining nail to maintain higher positioning stability during operation.

[0023] In some specific embodiments, a spline hole is provided at the center of the surface of the first mating portion that mates with the hand-cranked ammunition feeding device, and the hand-cranked ammunition feeding device is detachably mated with the spline hole through a spline.

[0024] By adopting the above technical solution, spline connection can provide more efficient torque transmission, reduce energy loss during transmission, reduce the possibility of loosening and slipping, ensure stability during operation, and at the same time, spline connection has good self-aligning ability, can automatically adjust alignment during installation, reduce transmission errors caused by improper installation, and improve the reliability of the device.

[0025] This application mainly solves the problems in the prior art that the hand-cranked ammunition feeding device occupies a large space, is not convenient for personnel to operate, use and maintain. This application proposes a crank handle for a hand-cranked ammunition feeding device that can be quickly disassembled and folded. The whole crank handle is detachably installed on the hand-cranked ammunition feeding device through the spline groove of the first fitting part, so that the whole crank handle is convenient for disassembly and installation. At the same time, the design of the foldable handle further reduces the space occupied by the crank handle, which is beneficial for personnel to operate or perform maintenance in the turret. The foldable handle is clamped on the chuck base through a clamping disc, and the elastic structure of the spring retaining pin can prevent the foldable handle from falling off due to vibration, making the crank handle have strong stability and detachability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate the embodiments and, together with the description, are used to explain the principles of the present invention. Other embodiments and many of the intended advantages of the embodiments will be readily apparent as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale with each other. The same reference numerals refer to corresponding like parts.

[0027] Figure 1 is a schematic diagram of the installation of the crank handle according to an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of the foldable handle according to a specific embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of the clamping disc according to a specific embodiment of the present invention;

[0030] Figure 4 is a schematic structural diagram of the chuck base according to a specific embodiment of the present invention;

[0031] Figure 5 is a schematic structural diagram of the spring retaining pin according to a specific embodiment of the present invention.

[0032] The meanings of the numbers in the figures are as follows:

[0033] Hand-cranked ammunition feeding device 01, spline 011, connecting arm 02, first fitting part 021, second fitting part 022, chuck base 03, second fixing seat 031, clamping part 032, retaining pin groove 033, clamping disc 04, first fixing seat 041, clamping claw 042, foldable handle 05, mounting base 051, hollow frustum 052, swing arm 053, grip 054, connecting part 055, spring retaining pin 06, retaining pin head 061, spring part 062, limiting part 063, limiting ring 064. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In the following detailed description, reference is made to the accompanying drawings, which form a part of the detailed description and illustrate illustrative specific embodiments in which the present utility model can be practiced. In this regard, directional terms such as "top", "bottom", "left", "right", "upper", "lower", etc. are used with reference to the orientation of the described figures. Since the components of the embodiments can be positioned in several different orientations, the directional terms are used for the purpose of illustration and are in no way limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present utility model. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present utility model is defined by the appended claims.

[0035] This application proposes a crank handle of a hand-cranked ammunition feeding device that can be quickly disassembled and folded. Figure 1 The schematic diagram of the installation of the crank handle according to an embodiment of the present utility model is shown. As shown in the figure, the crank handle includes a connecting arm 02. The two ends of the connecting arm 02 are respectively provided with a first mating part 021 and a second mating part 022. The first mating part 021 is detachably installed on the hand-cranked ammunition feeding device 01. Specifically, a spline hole (not shown in the figure) is opened at the center of the surface of the first mating part 021 that cooperates with the hand-cranked ammunition feeding device 01. The hand-cranked ammunition feeding device 01 is detachably cooperated with the spline hole through a spline 011. A chuck base 03 is fixed on the second mating part 022. A clamping disc 04 is clamped on the chuck base 03. A foldable handle 05 is installed at the center of the clamping disc 04. The foldable handle 05 drives the second mating part 022 to rotate around the center of the first mating part 021. The whole crank handle is detachably cooperated with the hand-cranked ammunition feeding device 01 through the first mating part 021. At the same time, the cooperation between the clamping disc 04 and the chuck base 03 enables the clamping disc 04 to be quickly disassembled. The staff can open and shake the foldable handle 05, and then drive the second mating part 022 to rotate around the first mating part 021 through the chuck base 03. Further, through the cooperation between the spline 011 and the spline hole of the first mating part 021, the function of cranking and feeding the hand-cranked ammunition feeding device is realized. This structural design can withstand multiple disassembly, assembly and folding, enhancing the durability and reliability of the device, which is beneficial to long-term use and maintenance. The specific principle and structure are described in detail in combination with Figures 2 - 3 the application in

[0036] Figure 2 The schematic diagram of the structure of the foldable handle according to a specific embodiment of the present utility model is shown. As Figures 1 - 2As shown, the collapsible handle 05 includes a mounting base 051. A number of holes are provided on the mounting base 051, and it is fitted with the center of the clamping disc 04 through bolts. A convex hollow frustum 052 is also provided at the center of the mounting base 051. An arm 053 extends from the outer side of the hollow frustum 052. A grip 054 is rotatably provided at the end of the arm 053. The mounting base 051 is tightly fitted with the center of the clamping disc 04 through bolts, ensuring the firmness of the connection and preventing loosening or detachment. The structural design of the convex hollow frustum 052 optimizes the torque transmission path. Combined with the use of the arm 053, it can more effectively transmit the operating force, improving the working efficiency of the hand-cranked ammunition feeding device 01. The grip 054 is designed as a collapsible structure, which can be folded when not in use, reducing the occupied space of the device and enhancing portability, especially suitable for application scenarios that require frequent movement or have limited storage space.

[0037] In a specific embodiment, a vertical connecting portion 055 is provided at the end of the arm 053. The top of the grip 054 is snapped into the groove of the connecting portion 055 and is rotatably connected to the connecting portion 055 through a pin shaft (not shown in the figure). By using the connecting portion 055 perpendicular to the end of the arm 053, the grip 054 can be made to closely adjoin the arm 053 after folding, further saving the occupied space of the collapsible handle 05. Through the pin shaft connection, the grip 054 can rotate freely within a certain range, allowing the user to adjust the angle of the grip 054 according to different operating requirements and postures, providing greater operating flexibility and adaptability.

[0038] Figure 3 The structural schematic diagram of the clamping disc according to a specific embodiment of the present invention is shown. As Figures 1 - 3 shown, the clamping disc 04 includes a first fixed seat 041 in the middle and clamping claws 042 arranged equidistantly around the first fixed seat 041. The clamping claws 042 arranged equidistantly can provide sufficient support for the cooperation between the clamping disc 04 and the chuck base 03, evenly distributing the stress points and ensuring the stability of the cooperation. The equidistant design of the clamping claws 042 can also avoid the offset problem during the installation process, thereby improving the assembly accuracy and efficiency.

[0039] Figure 4 The structural schematic diagram of the chuck base according to a specific embodiment of the present invention is shown. As Figures 1 - 4As shown, the chuck base 03 includes a second fixed seat 031 in the middle. Around the second fixed seat 031, there are clamping portions 032 corresponding to the positions of the clamping jaws 042. The second fixed seat 031 and the second mating portion 022 are bolted together. The clamping jaws 042 are inserted into the grooves of the clamping portions 032. The provision of the clamping portions 032 facilitates the quick installation of the clamping disc 04, ensuring that the clamping jaws 042 can be accurately inserted into the clamping portions 032 to achieve precise positioning. The bolt and clamping method reduces the complexity of installation and is more conducive to installation, maintenance, and servicing.

[0040] In a specific embodiment, a retaining pin groove 033 is formed on the side of the clamping portion 032 facing the foldable handle 05. The spring retaining pin 06 passes through the retaining pin groove 033 and abuts against the side of the clamping jaw 042. Due to the design of the retaining pin groove 033 and the spring retaining pin 06, the clamping jaws 042 can be more firmly fixed within the clamping portions 032, avoiding loosening or falling off caused by vibration or external forces during use, thereby improving the safety of operation. Specifically, before the clamping jaws 042 are inserted into the clamping portions 032, they first abut against the end of the spring retaining pin 06. The end of the spring retaining pin 06 is compressed upward by the force, allowing the clamping jaws 042 to pass through. After the clamping jaws 042 are inserted into the clamping portions 032, the spring retaining pin 06 is decompressed and reset, enabling the clamping jaws 042 to maintain a stable state within the clamping portions.

[0041] In a specific embodiment, the clamping jaws 042 are L-shaped, and the end of the spring retaining pin 06 abuts against the side of the bent portion of the clamping jaws 042. The L-shaped clamping jaws 042 provide two contact surfaces. The combination with the spring retaining pin 06 can form a more stable support point at the bent portion, providing a larger contact area. Through the lateral support of the spring retaining pin 06, a greater tightening force can be applied, enhancing the overall fixing effect between the clamping jaws 042 and the clamping portions 032 and reducing the risk of loosening.

[0042] Figure 5 The structural schematic diagram of the spring retaining pin according to a specific embodiment of the present invention is shown. As Figures 1 - 5 shown, the spring retaining pin 06 includes a retaining pin head 061, a spring portion 062, and a limiting portion 063. The retaining pin head 061 and the spring portion 062 are placed in the retaining pin groove 033. The end of the limiting portion 063 protrudes from the hole position on the bottom surface of the retaining pin groove 033. The design of the limiting portion 063 enables the spring retaining pin 06 to maintain a stable position within the retaining pin groove 033, avoiding displacement of the spring retaining pin 06 due to external forces. The elastic force provided by the spring portion 062 allows the limiting portion 063 to automatically adjust according to the position of the clamping jaws 042, ensuring that stable support and positioning can still be provided when the clamping jaws 042 move or are impacted.

[0043] In a specific embodiment, a limiting ring 064 is further provided around the connection between the limiting portion 063 and the spring portion 062. The limiting ring 064 abuts against the inner bottom surface of the retaining pin groove 033. The design of the limiting ring 064 defines the installation depth and position of the spring retaining pin 06, making it easier to locate during the installation process, improving the assembly efficiency, effectively restricting the up and down movement of the spring retaining pin 06, and enabling the spring retaining pin 06 to maintain higher positioning stability during operation.

[0044] This application mainly solves the problems in the prior art that the hand-cranked ammunition feeding device occupies a large space and is not convenient for personnel to operate, use, maintain and repair. This application proposes a crank handle for a hand-cranked ammunition feeding device that can be quickly disassembled and folded. The whole crank handle is detachably installed on the hand-cranked ammunition feeding device 01 through the spline groove of the first mating portion 021, making the whole crank handle easy to disassemble and install. At the same time, the design of the foldable handle 05 further reduces the space occupied by the crank handle, which is beneficial for personnel to operate or perform maintenance and repair inside the turret. The foldable handle 05 is snap-fitted on the chuck base 03 through the snap chuck 04, and by utilizing the elastic structure of the spring retaining pin 06, it can prevent the foldable handle 05 from falling off due to vibration, making the crank handle have strong stability and detachability.

[0045] Obviously, those skilled in the art can make various modifications and changes to the embodiments of the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and changes are within the scope of the claims of the present invention and their equivalent forms, the present invention also aims to cover these modifications and changes. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A crank of a hand-operated ammunition feeding device that can be quickly disassembled and folded, characterized in that, It includes a connecting arm, with a first fitting portion and a second fitting portion respectively provided at both ends of the connecting arm. The first fitting portion is detachably mounted on the hand-cranked ammunition feeding device; a chuck base is fixed on the second fitting portion, a clamping disc is clamped on the chuck base, and a foldable handle is installed at the center of the clamping disc. The foldable handle drives the second fitting portion to rotate around the center of the first fitting portion.

2. The crank according to claim 1, characterized in that, The foldable handle includes a mounting base, the mounting base is fitted with the center of the clamping disc through bolts, and a protruding hollow frustum is further provided at the center of the mounting base. An oscillating arm extends from the outer side surface of the hollow frustum, and a grip is rotatably arranged at the end of the oscillating arm.

3. The crank according to claim 2, characterized in that, A vertical connecting portion is provided at the end of the oscillating arm, and the grip is rotatably connected to the connecting portion through a pin shaft.

4. The crank according to claim 1, wherein The clamping disc includes a first fixing base in the middle and clamping claws arranged equidistantly around the first fixing base.

5. The crank according to claim 4, wherein, The chuck base includes a second fixing base in the middle, and clamping portions corresponding to the positions of the clamping claws are arranged around the second fixing base. The second fixing base is in bolt fit with the second fitting portion, and the clamping claws are inserted into the grooves of the clamping portions.

6. The crank according to claim 5, wherein A retaining pin groove is formed on the surface of the clamping portion facing the foldable handle, and a spring retaining pin passes through the retaining pin groove and abuts against the side surface of the clamping claw.

7. The crank according to claim 6, characterized in that, The clamping claw is L-shaped, and the end of the spring retaining pin abuts against the side surface of the bent portion of the clamping claw.

8. The crank according to claim 6, characterized in that, The spring retaining pin includes a retaining pin head, a spring portion and a limiting portion. The retaining pin head and the spring portion are placed in the retaining pin groove, and the end of the limiting portion protrudes from the hole position on the bottom surface of the retaining pin groove.

9. The crank according to claim 8, wherein, A limiting ring is further arranged around the connection between the limiting portion and the spring portion, and the limiting ring abuts against the inner bottom surface of the retaining pin groove.

10. The crank according to claim 1, characterized in that, A spline hole is formed at the center of the surface of the first fitting portion that cooperates with the hand-cranked ammunition feeding device, and the hand-cranked ammunition feeding device is detachably fitted with the spline hole through a spline.

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