Pin pulling safety device for gun shooting test

Abstract

The invention discloses a pull pin safety device for a gun shooting test, which belongs to the technical field of fuse safety mechanisms and comprises a shell, a safety pin, a conductive pin, an elastic body and a pull rope, the pull rope is arranged on one side of the shell, and the safety pin is manually pulled through the pull rope to relieve safety, so that the safety can be relieved according to needs after the pull pin safety is installed in an artillery, and the safety of a gun shooting test is guaranteed; meanwhile, two conductive pins of which one ends are connected through a wire are arranged, and the safety pin is conductive, so that the safety pin can be in contact with the two conductive pins when the safety pin relieves the safety, and the other ends of the two conductive pins are communicated to form a conductive loop, so that the on-off state of the two conductive pins can be remotely judged; and judging whether the safety pin relieves the safety in place. The pull pin safety device for the gun shooting test is simple in structure, reasonable in design and convenient to operate, the safety of the gun shooting test is effectively improved, and the pull pin safety device has good application prospects and popularization value.

Description

Technical Field

[0001] The invention belongs to the technical field of fuze safety mechanisms, and in particular relates to a pull pin safety for artillery firing tests. Background Art

[0002] Cannon firing test is a common method to verify the performance of fuzes. In order to ensure the safety of the test, cannon firing test fuzes are usually equipped with insurance. Usually, the fuze insurance during cannon firing test has an electrical insurance, which is released by power supply, and a muzzle insurance, which is activated by overload in the chamber.

[0003] However, in the art, when the gun firing test fuze is installed in the gun, generally only the muzzle safety is left, and the general electrical safety is released before the gun is installed in the gun. In addition, for the gun firing test with a low firing speed, the overload in the bore is generally low, in which case, the muzzle safety may not be released. Summary of the invention

[0004] In response to one or more of the above defects or improvement needs in the prior art, the present invention provides a pull-pin safety for artillery firing tests, which can be released manually and can remotely test whether the safety is released in place, thereby greatly improving the safety of artillery firing tests.

[0005] To achieve the above-mentioned purpose, the present invention provides a pull pin safety for a gun firing test, which comprises a housing, a safety pin, a conductive pin, an elastic body and a pull rope;

[0006] The shell is hollow inside; the safety pin is conductive, one end of which is encapsulated in the shell, and the other end of which protrudes out of the shell in an initial state;

[0007] The conductive pins are provided in two numbers and are arranged at intervals on a side of the housing away from the safety pin, and one end of the two conductive pins is connected by a wire, and the other end is arranged opposite to the safety pin;

[0008] The elastic body is arranged in a compressed state between the housing and the safety pin, and one end of the elastic body abuts against a side of the safety pin close to the conductive pin, and the other end abuts against an inner side surface of the housing close to the conductive pin;

[0009] One end of the pull rope is connected to the safety pin, and the other end extends out of the housing near the conductive pin, so that when the extended end of the safety pin is retracted into the housing by pulling the pull rope, the safety pin is in contact and connected with the two conductive pins.

[0010] As a further improvement of the present invention, the safety pin includes a large cylinder and a small cylinder; the large cylinder is encapsulated in the shell, one end of the small cylinder is fixedly connected to the large cylinder, and the other end can extend out of the shell as an extended end.

[0011] As a further improvement of the present invention, a blind hole is provided at one end of the large cylinder close to the elastic body, and one end of the elastic body extends into and abuts against the blind hole.

[0012] As a further improvement of the present invention, the elastic body is a drive spring, and the initial compression amount of the drive spring is 10% to 15%.

[0013] As a further improvement of the present invention, in an initial state, a distance between a side of the safety pin close to the conductive pin and the conductive pin is greater than a protruding length of the safety pin extending out of the housing.

[0014] As a further improvement of the present invention, at least one boss is arranged on the side wall of the safety pin close to one end of the conductive pin, and a groove extending along the stretching direction of the pull rope is arranged on the inner wall of the shell corresponding to the boss, and the boss is slidably embedded in the groove.

[0015] As a further improvement of the present invention, the boss is provided in plurality corresponding to the conductive pin and the pull rope, one end of the pull rope is passed through and fixedly connected to the boss, and one end of the conductive pin can abut against the boss.

[0016] As a further improvement of the present invention, two first through holes are symmetrically arranged on the side of the housing facing away from the safety pin;

[0017] The conductive pin is a stepped cylinder, one end of which is arranged in the first through hole with an interference fit, and the other end protrudes from the inner side surface of the shell.

[0018] As a further improvement of the present invention, the pull rope is symmetrically arranged in two, and two second through holes are symmetrically arranged on one side of the shell close to the conductive pin, and one end of the pull rope extends out of the shell from the second through hole.

[0019] As a further improvement of the present invention, the shell has an opening on one side close to the safety pin, and a compression screw is arranged corresponding to the opening, the compression screw encapsulates the large cylinder in the shell, and a third through hole is arranged on the compression screw, and one end of the small cylinder extends out of the shell from the third through hole.

[0020] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0021] In general, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:

[0022] (1) The pull-pin safety for the artillery firing test of the present invention is provided with a pull rope on one side of the shell so that the safety pin can be manually pulled to release the safety. After the pull-pin safety is installed in the artillery, the safety can be released as needed. After all the preparations are completed, the safety can be manually released to ensure the safety of the artillery firing test. At the same time, two conductive pins connected at one end by a wire are provided, and the safety pin is configured to be conductive. When the safety pin is released, it can contact the two conductive pins, and then the other ends of the two conductive pins are connected to form a conductive circuit, so that it can be remotely judged by judging the on-off state of the two conductive pins to determine whether the safety pin is released.

[0023] (2) The pull pin safety for the gun firing test of the present invention is provided by providing at least one boss on the outer side wall of the safety pin, and providing a groove on the inner side wall of the outer shell corresponding to the boss, so as to limit the safety pin circumferentially by sliding the boss into the groove, thereby preventing the safety pin from rotating in the outer shell; and by providing a spring between the outer shell and the safety pin, when the safety pin is in the initial safety state, an outward force is provided to the safety pin, thereby ensuring that the safety pin will not retract even under impact, vibration and other environments, thereby ensuring the reliability of the safety function of the safety pin.

[0024] (3) The pull pin safety for the gun firing test of the present invention sets the distance between the safety pin and the conductive pin to be greater than the extended length of the safety pin, so as to ensure that the safety pin is released in place when the safety pin is connected to the conductive pin.

[0025] (4) The pull pin safety for the cannon firing test of the present invention has a simple structure, reasonable design, and convenient operation, which effectively improves the safety of the cannon firing test and has good application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a half-section view of the initial state of the pull pin safety for the gun firing test in the embodiment of the present invention;

[0028] Figure 2 It is a schematic cross-sectional view of the conductive pin portion of the pull pin safety for the gun firing test in an embodiment of the present invention;

[0029] Figure 3 2 is a schematic cross-sectional view of a pull rope portion of a pull pin safety for a gun firing test according to an embodiment of the present invention;

[0030] Figure 4 It is a half-section view of the embodiment of the present invention in which the pull pin for the gun firing test is in the safety state in place;

[0031] Figure 5 It is a schematic cross-sectional view of the conductive pin portion of the gun firing test in the embodiment of the present invention when the pull pin safety is in place;

[0032] Figure 6 It is a schematic diagram of the overall structure of the safety pin in an embodiment of the present invention;

[0033] In all the drawings, the same figure marks represent the same technical features, specifically: 1. safety pin; 101. large cylinder; 102. small cylinder; 103. boss; 2. drive spring; 3. housing; 4. conductive pin; 5. pull rope; 6. pressure screw; 7. screw. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Example:

[0040] See also Figure 1 to Figure 6 The pull pin safety for the gun firing test in the preferred embodiment of the present invention comprises a housing 3, a safety pin 1, a conductive pin 4, an elastic body and a pull rope 5, so that the safety pin 1 is pulled back into the housing 3 by the pull rope 5, the safety is manually released, and after pulling, the two conductive pins 4 are connected by the safety pin 1, and then the on-off state of the conductive pin 4 is used to judge whether the safety is released in place to prevent misjudgment.

[0041] Specifically, if Figure 1 As shown in FIG. 1 , the housing 3 in the preferred embodiment is a cylindrical structure, and its interior is hollow with one end open, for accommodating the elastic body and the safety pin 1 .

[0042] Furthermore, the safety pin 1 is conductive, and its material is aluminum with good conductivity. One end of the safety pin 1 is encapsulated in the housing 3, and the other end extends out of the housing 3 in the initial state. Figure 1 As shown in the figure, the safety pin 1 in the preferred embodiment is a stepped cylindrical structure, including a large cylinder 101 and a small cylinder 102, wherein the large cylinder 101 is encapsulated in the outer shell 3, one end of the small cylinder 102 is fixedly connected to the large cylinder 101, and the other end can extend out of the outer shell 3 through the opening on the outer shell 3 as an extended end.

[0043] Preferably, a pressure screw 6 is provided corresponding to the opening of the housing 3 on one side close to the safety pin 1, and the pressure screw 6 is fixed to the side of the housing 3 close to the opening by a screw 7 to close the opening. Accordingly, a third through hole is provided in the middle of the pressure screw 6, and the diameter of the third through hole is larger than the diameter of the small cylinder 102 and smaller than the diameter of the large cylinder 101, so that the large cylinder 101 is encapsulated in the housing 3, and the end of the small cylinder 102 away from the large cylinder 101 can extend out of the housing 3 from the third through hole.

[0044] Furthermore, if Figure 2 As shown in the figure, the conductive pin 4 in the preferred embodiment is conductive and made of copper material with good conductivity. Two conductive pins 4 are provided and spaced apart on the side of the housing 3 away from the safety pin 1. At the same time, one end of the two conductive pins 4 is connected by a wire, and the other end is arranged opposite to the safety pin 1, so that when the extended end of the safety pin 1 is retracted, the side of the safety pin 1 close to the conductive pin 4 can move to contact with the two conductive pins 4 at the same time, and the other ends of the two conductive pins 4 are connected to form a conductive loop, as shown in the figure. Figures 4-5 As shown in , it is convenient for the remote operator to judge whether the insurance is released by judging whether the conductive pin 4 is on or off.

[0045] Preferably, the distance between the side of the safety pin 1 close to the conductive pin 4 and the conductive pin 4 is greater than the extension length of the safety pin 1 out of the housing 3 to ensure that when the safety pin 1 moves to connect with the conductive pin 4, the safety pin 1 is completely retracted into the housing 3.

[0046] Preferably, the conductive pin 4 is configured as a stepped cylinder, and two first through holes are symmetrically arranged on the side of the shell 3 facing away from the safety pin 1. One end of the conductive pin 4 is fixed in the first through hole by interference fit, and the other end protrudes from the inner side of the shell 3 so as to be in contact and connected with the safety pin 1 through the protruding part.

[0047] Furthermore, if Figure 3 As shown in the figure, one end of the pull rope 5 in the preferred embodiment is arranged in the housing 3 and fixedly connected to the safety pin 1, and the other end extends from a side of the housing 3 close to the conductive pin 4, so that by pulling the pull rope 5, the safety pin 1 is driven to move in the direction of the conductive pin 4.

[0048] Preferably, two pull ropes 5 are symmetrically arranged, and two second through holes are symmetrically arranged on one side of the housing 3 close to the conductive pin 4 , and one end of the pull rope 5 extends out of the housing 3 from the second through hole.

[0049] In a preferred embodiment, the first through holes and the second through holes are symmetrically arranged in pairs on the housing 3 and are evenly arranged in the circumferential direction.

[0050] Preferably, at least one boss 103 is provided on the side wall of the safety pin 1 close to the conductive pin 4, and a groove is provided on the inner wall of the outer shell 3 corresponding to the boss 103, and the groove extends along the stretching direction of the pull rope 5, and the boss 103 is slidably embedded in the groove, so that when the pull rope 5 pulls the safety pin 1 to move, the safety pin 1 is guided and limited by the groove to prevent the safety pin 1 from rotating in the outer shell 3.

[0051] Preferably, if Figure 6 As shown in the figure, the boss 103 is provided with multiple corresponding conductive pins 4 and pull ropes 5, one end of the pull rope 5 is correspondingly passed through and fixedly connected to the boss 103, and one end of the conductive pin 4 can abut against the corresponding boss 103 when the safety pin 1 is retracted.

[0052] Furthermore, the elastomer in the preferred embodiment is arranged in the shell 3 and is compressed between the shell 3 and the safety pin 1, and one end thereof abuts against the side of the safety pin 1 close to the conductive pin 4, and the other end abuts against the inner side surface of the shell 3 close to the conductive pin 4, so as to provide a force for the safety pin 1 in the direction away from the pull rope 5, ensuring that in the initial state, the large cylinder 101 is always pressed against the pressure screw 6, avoiding the small cylinder 102 from retracting under impact, vibration and other environments, thereby ensuring the reliability of the pull pin safety.

[0053] Preferably, the elastic body is a driving spring 2, and further preferably, the compression amount of the driving spring 2 in the initial state is 10% to 15% to provide sufficient elastic force.

[0054] Preferably, a blind hole is provided on one side of the large cylinder 101 close to the elastic body, and one end of the elastic body is extended into and abutted against the blind hole, so as to shorten the length occupied by the elastic body in the housing 3 .

[0055] The pull pin safety for the cannon firing test of the present invention has a simple structure, reasonable design, and convenient operation, which effectively improves the safety of the cannon firing test and has good application prospects and promotion value.

[0056] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pull pin safety for a gun firing test, characterized in that: It includes a housing, a safety pin, a conductive pin, an elastic body and a pull rope; The shell is hollow inside; the safety pin is conductive, one end of which is encapsulated in the shell, and the other end of which protrudes out of the shell in an initial state; The conductive pins are provided in two numbers and are arranged at intervals on a side of the housing away from the safety pin, and one end of the two conductive pins is connected by a wire, and the other end is arranged opposite to the safety pin; The elastic body is arranged in a compressed state between the housing and the safety pin, and one end of the elastic body abuts against a side of the safety pin close to the conductive pin, and the other end abuts against an inner side surface of the housing close to the conductive pin; One end of the pull rope is connected to the safety pin, and the other end extends out of the housing near the conductive pin, so that when the extended end of the safety pin is retracted into the housing by pulling the pull rope, the safety pin is in contact and connected with the two conductive pins.

2. The pull pin safety for gun firing test according to claim 1, characterized in that: The safety pin comprises a large cylinder and a small cylinder; the large cylinder is enclosed in the shell, one end of the small cylinder is fixedly connected to the large cylinder, and the other end serves as an extended end and can extend out of the shell.

3. The pull pin safety for gun firing test according to claim 2, characterized in that: A blind hole is arranged at one end of the large cylinder close to the elastic body, and one end of the elastic body extends into and abuts against the blind hole.

4. The pull pin safety for gun firing test according to claim 1, characterized in that: The elastic body is a driving spring, and the initial compression amount of the driving spring is 10% to 15%.

5. The pull pin safety for gun firing test according to claim 1, characterized in that: In an initial state, a distance between a side of the safety pin close to the conductive pin and the conductive pin is greater than a protruding length of the safety pin extending out of the housing.

6. The pull pin safety for gun firing test according to claim 1, characterized in that: At least one boss is arranged on the side wall of the safety pin near one end of the conductive pin, and a groove extending along the pulling direction of the pull rope is arranged on the inner wall of the shell corresponding to the boss, and the boss is slidably embedded in the groove.

7. The pull pin safety for gun firing test according to claim 6, characterized in that: The bosses are arranged in plurality corresponding to the conductive pins and the pull ropes, one end of the pull rope is passed through and fixedly connected to the bosses, and one end of the conductive pins can abut against the bosses.

8. The pull pin safety for a gun firing test according to any one of claims 1 to 7, characterized in that: Two first through holes are symmetrically arranged on the side of the housing facing away from the safety pin; The conductive pin is a stepped cylinder, one end of which is arranged in the first through hole with an interference fit, and the other end protrudes from the inner side surface of the shell.

9. The pull pin safety for a gun firing test according to any one of claims 1 to 7, characterized in that: The pull ropes are symmetrically arranged in two numbers, and two second through holes are symmetrically arranged on one side of the housing close to the conductive pin, and one end of the pull rope extends out of the housing from the second through hole.

10. The pull pin safety for gun firing test according to claim 2, characterized in that: The shell has an opening on one side close to the safety pin, and a compression screw is arranged corresponding to the opening. The compression screw encapsulates the large cylinder in the shell, and a third through hole is arranged on the compression screw. One end of the small cylinder extends out of the shell from the third through hole.

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