Firing pin feeding detection mechanism for needling sensitivity testing machine

Abstract

The invention provides a firing pin feeding detection mechanism for a needling sensitivity testing machine, the firing pin feeding detection mechanism comprises a detection fixing plate, a single-shaft telescopic module, a pin pressing assembly and a detection switch, one end of the detection fixing plate is provided with the single-shaft telescopic module, the telescopic end of the single-shaft telescopic module is provided with the pin pressing assembly and the detection switch, and the detection switch is located at the upper end of the pin pressing assembly. When one end of the pin pressing assembly extrudes the firing pin, the other end of the pin pressing assembly touches the detection switch to determine the position of the firing pin, whether the firing pin is placed in place or not can be accurately detected, and test errors caused by the incorrect position of the firing pin are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of needle puncture sensitivity testing equipment, and in particular relates to a firing pin feeding detection mechanism for a needle puncture sensitivity testing machine. Background Art

[0002] Needle sensitivity refers to the ease with which the explosive explodes when pierced by a needle. It is evaluated by using a steel ball (or hammer) of a certain mass to fall freely from different heights to hit the firing pin. The firing pin pokes the primer and the ignition of the primer is observed.

[0003] The needle sensitivity test is one of the important means to evaluate the safety and reliability of pyrotechnics. The traditional test method is to use manual operation to assemble the test components and then strike the firing pin. This not only has low work efficiency but also poor test accuracy. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a firing pin feeding detection mechanism for a needle sensitivity testing machine, which is configured by setting one end of a pressing pin assembly to squeeze the firing pin, and setting a detection switch at the other end of the pressing pin assembly. The detection switch detects the extension and retraction amount of the pressing pin assembly to accurately detect whether the firing pin is placed in place, thereby avoiding test errors caused by incorrect firing pin position.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A firing pin feeding detection mechanism for a needle puncture sensitivity testing machine comprises a detection fixing plate, a uniaxial telescopic module, a pressing pin assembly and a detection switch, wherein the uniaxial telescopic module is arranged at one end of the detection fixing plate, the pressing pin assembly and the detection switch are arranged at the telescopic end of the uniaxial telescopic module, and the detection switch is located at the upper end of the pressing pin assembly; when one end of the pressing pin assembly squeezes the firing pin, the other end of the pressing pin assembly touches the detection switch to determine the position of the firing pin.

[0007] Furthermore, a vertical connecting plate is provided on the extended end of the detection fixing plate, the single-axis telescopic module is fixed on the vertical connecting plate, a seat tube fixing seat is provided on the lower telescopic end of the single-axis telescopic module, and the seat tube fixing seat is sleeved with the pressure needle assembly.

[0008] Furthermore, the pressure needle assembly includes a pressure needle shaft, a pressure needle spring and a pressure needle seat cylinder. The pressure needle seat cylinder is embedded in the seat cylinder fixing seat. The pressure needle shaft is slidably sleeved in the pressure needle seat cylinder. The pressure needle spring is sleeved on the pressure needle shaft located at the lower end of the pressure needle seat cylinder. Both ends of the pressure needle spring are blocked between the pressure needle shaft and the pressure needle seat cylinder.

[0009] Furthermore, an L-shaped plate is provided on the lower telescopic end of the single-axis telescopic module, the seat tube fixing seat is provided on the upper end of one side of the L-shaped plate, a U-shaped bracket is provided on the L-shaped plate, and the detection switch is provided on the U-shaped bracket.

[0010] Furthermore, a flange platform is provided at the lower end of the pressing needle shaft and radially extends toward the outer circumference of the pressing needle shaft, and the lower end of the pressing needle spring abuts against the flange platform.

[0011] Furthermore, the spring force of the needle pressing spring is smaller than the force that triggers the primer to ignite.

[0012] Furthermore, the detection switch is a proximity switch or a photoelectric switch.

[0013] Furthermore, the proximity switch is arranged in the middle of the U-shaped bracket and is spaced apart from the pressure needle shaft.

[0014] Furthermore, a pair of the photoelectric switches are respectively arranged on both sides of the U-shaped bracket, and the detection light paths of the pair of the photoelectric switches intersect the axis of the pressure needle shaft perpendicularly.

[0015] Furthermore, the firing pin feeding detection mechanism also includes a manual lifting and adjusting module, which is arranged at one end of the detection fixing plate, and the single-axis telescopic module is arranged on the telescopic end of the manual lifting and adjusting module, and a detection scale is arranged on one side of the detection fixing plate.

[0016] The present invention adopts the above technical solution, which has the following advantages and effects:

[0017] The present invention provides a firing pin feeding detection mechanism for a needle sensitivity testing machine. By providing a pressing pin assembly and a detection switch, the mechanism can accurately detect whether the firing pin is in place, thereby avoiding test errors caused by incorrect firing pin position. When the detection switch fails to detect the upper end of the pressing pin shaft, it indicates that the firing pin is not accurately placed in the firing pin hole of the upper cover. At this time, an alarm prompt will be triggered, and manual intervention will be required to handle the problem, thereby avoiding safety accidents caused by misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an isometric structural schematic diagram of the firing pin feeding detection mechanism of the present invention.

[0019] Figure 2 for Figure 1 Schematic diagram of the explosion structure.

[0020] Figure 3 It is a schematic diagram of the structure of the needle pressing assembly of the present invention.

[0021] Figure 4 for Figure 2 Schematic diagram of the explosion structure.

[0022] The accompanying drawings are marked as follows: 1-detection fixing plate, 2-single-axis telescopic module, 3-pressing needle assembly, 31-pressing needle shaft, 32-pressing needle spring, 33-pressing needle seat cylinder, 34-seat cylinder fixing seat, 4-vertical connecting plate, 5-U-shaped bracket, 6-L-shaped plate, 7-manual lifting and lowering adjustment module, 8-detection scale. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0024] The needle puncture sensitivity test machine is used to assemble the test components and then conduct the impact test. After the impact test is completed, the test components are disassembled one by one for cleaning, and then the cycle is repeated after cleaning. The test components include multiple accessories, namely, the base, lead plate, plastic seat, primer, upper cover and firing pin. The lead plate is placed on the base of the test platform, the plastic seat is placed on the lead plate, the primer is placed on the plastic seat, the upper cover is buckled on the base to cover the primer, the firing pin is inserted into the upper cover to contact the primer, and the firing pin is struck to make the firing pin poke the primer to complete the impact test.

[0025] When inserting the firing pin into the upper cover, it is also necessary to ensure that the firing pin contacts the percussion cap and does not trigger the percussion cap to ignite. Therefore, the firing pin feeding detection mechanism for the needle puncture sensitivity tester provided by the present invention can be used to detect whether the firing pin is placed in the upper cover to determine whether the placement position of the firing pin is correct.

[0026] like Figure 1 , Figure 2 As shown. A firing pin feeding detection mechanism for a needle puncture sensitivity tester of the present invention comprises a detection fixing plate 1, a uniaxial telescopic module 2, a pressure needle assembly 3 and a detection switch. The detection fixing plate 1 is located at the upper end of the rotating table of the needle puncture sensitivity tester, and one end thereof is arranged on the upper supporting table of the needle puncture sensitivity tester. The other end of the detection fixing plate 1 extends to the outer peripheral edge of the rotating table, and the uniaxial telescopic module 2 is arranged at the extended end. The pressure needle assembly 3 and the detection switch are arranged at the telescopic end of the uniaxial telescopic module 2, and the detection switch is located at the upper end of the pressure needle assembly 3. When one end of the pressure needle assembly 3 squeezes the firing pin, the other end of the pressure needle assembly 3 touches the detection switch to determine the position of the firing pin.

[0027] Specifically, a vertical connecting plate 4 is provided on the extended end of the detection fixing plate 1, and a uniaxial telescopic module 2 is fixed on the vertical connecting plate 4. An L-shaped plate 6 is provided on the lower telescopic end of the uniaxial telescopic module 2. A seat tube fixing seat 34 is provided on the upper end of one side of the L-shaped plate 6. The seat tube fixing seat 34 is sleeved with a pressure needle assembly 3. A U-shaped bracket 5 is provided on the L-shaped plate 6 at the upper end of the pressure needle assembly, and a detection switch is provided on the U-shaped bracket 5. The pressure needle assembly 3 presses the firing pin downward so that the lower end of the firing pin contacts the upper end of the primer. The uniaxial telescopic module 2 moves downward to drive the pressure needle assembly 3 to squeeze the firing pin. When the firing pin contacts the primer and is in place, the pressure needle assembly 3 moves upward to touch the detection switch to realize the detection of the firing pin in place.

[0028] When the lower end of the pressing needle assembly 3 squeezes the firing pin, the upper end of the pressing needle assembly 3 moves upward to the position of the detection switch to trigger the detection switch. According to the expansion and contraction amount of the pressing needle assembly 3, it can be determined whether the position of the firing pin is correct.

[0029] like Figure 3 , Figure 4 Further, the needle pressing assembly 3 comprises a needle pressing shaft 31, a needle pressing spring 32 and a needle pressing seat 33. The needle pressing seat 33 is embedded in a seat fixing seat 34. The needle pressing shaft 31 is slidably sleeved in the needle pressing seat 33. The needle pressing spring 32 is sleeved on the needle pressing shaft 31 at the lower end of the needle pressing seat 33. The two ends of the needle pressing spring 32 are blocked between the needle pressing shaft 31 and the needle pressing seat 33.

[0030] Specifically, the outer diameter of the pressure needle spring 32 is smaller than the outer diameter of the pressure needle seat tube 33, so that the upper end of the pressure needle spring 32 can be abutted against the lower end of the pressure needle seat tube 33. The lower end of the pressure needle shaft 31 is provided with a flange extending radially toward the outer periphery of the pressure needle shaft, and the lower end of the pressure needle spring 32 is abutted against the flange.

[0031] When the uniaxial telescopic module 2 moves downward, the pressing needle shaft 31 contacts the upper end surface of the firing pin to move the firing pin downward. When the tip of the firing pin contacts the primer, the pressing needle spring 32 generates compression to remove the redundant travel of the uniaxial telescopic module 2. The spring force of the pressing needle spring 32 is less than the force that triggers the primer to ignite. The upper end of the pressing needle shaft 31 bounces upward and touches the detection switch to detect the position of the firing pin. When the detection switch detects the upper end of the pressing needle shaft 31, it means that the firing pin has been pressed down and has been installed in place.

[0032] The detection switch is preferably a proximity switch or a photoelectric switch. When it is a proximity switch, the proximity switch is arranged in the middle of the U-shaped bracket 5 and is spaced apart from the pressing needle shaft 31. When it is a photoelectric switch, a pair of photoelectric switches are arranged on both sides of the U-shaped bracket 5, and the detection optical path of the pair of photoelectric switches intersects the axis of the pressing needle shaft 31 perpendicularly.

[0033] Since the contact position between the firing pin and the primer is fixed, the telescopic stroke of the pressing pin shaft 31 is fixed when the firing pin is pressed into place. When the single-axis telescopic module 2 is fully extended, if the detection switch does not detect the upper end of the pressing pin shaft, it means that the firing pin is not accurately placed in the firing pin hole of the upper cover. At this time, an alarm prompt will be triggered and manual intervention will be required.

[0034] Again Figure 1 , Figure 2 Further, in order to facilitate the adjustment of the telescopic amount of the pressing needle assembly 3, the firing pin feeding detection mechanism also includes a manual lifting adjustment module 7, the manual lifting adjustment module 7 is arranged at one end of the detection fixing plate 1, the single-axis telescopic module 2 is arranged on the telescopic end of the manual lifting adjustment module 7, and a detection scale 8 is arranged on one side of the detection fixing plate 1. The detection scale 8 is used to determine the adjustment amount of the manual lifting adjustment module 7 or the single-axis telescopic module 2, so as to facilitate the precise adjustment of the compression amount of the pressing needle assembly 3.

[0035] Specifically, the manual lifting and adjusting module 7 includes a vertical plate, a linear guide, a lead screw and a sliding sleeve. The vertical plate is fixed to one end of the detection fixed plate 1, a pair of linear guides are fixed to the vertical plate at intervals, a sliding sleeve is provided on the lead screw, and the two ends of the sliding sleeve are respectively connected to the sliders of the pair of linear guides, and the sliding sleeve is connected to the single-axis telescopic module 2 through the bottom plate. The upper end of the lead screw passes through the detection fixed plate 1 and is slidably connected to the detection fixed plate 1. The end of the lead screw extending out of the detection fixed plate 1 is provided with a manual rotating wheel, and the position of the pressure needle assembly 3 can be manually adjusted by the manual rotating wheel. The single-axis telescopic module 2 is preferably an electric telescopic rod or an electric telescopic rodless cylinder.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A firing pin feeding detection mechanism for a needle puncture sensitivity tester, characterized in that: It includes a detection fixing plate, a uniaxial telescopic module, a pressure needle assembly and a detection switch. The uniaxial telescopic module is arranged at one end of the detection fixing plate, and the pressure needle assembly and the detection switch are arranged at the telescopic end of the uniaxial telescopic module. The detection switch is located at the upper end of the pressure needle assembly. When one end of the pressure needle assembly squeezes the firing pin, the other end of the pressure needle assembly touches the detection switch to determine the position of the firing pin.

2. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 1, characterized in that: A vertical connecting plate is arranged on the extended end of the detection fixing plate, the single-axis telescopic module is fixed on the vertical connecting plate, a seat tube fixing seat is arranged on the lower telescopic end of the single-axis telescopic module, and the seat tube fixing seat is sleeved with the pressure needle assembly.

3. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 2, characterized in that: The pressure needle assembly includes a pressure needle shaft, a pressure needle spring and a pressure needle seat cylinder. The pressure needle seat cylinder is embedded in the seat cylinder fixing seat. The pressure needle shaft is slidably sleeved in the pressure needle seat cylinder. The pressure needle spring is sleeved on the pressure needle shaft located at the lower end of the pressure needle seat cylinder. Both ends of the pressure needle spring are blocked between the pressure needle shaft and the pressure needle seat cylinder.

4. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 3, characterized in that: An L-shaped plate is arranged on the lower telescopic end of the single-axis telescopic module, the seat tube fixing seat is arranged on the upper end of one side of the L-shaped plate, a U-shaped bracket is arranged on the L-shaped plate, and the detection switch is arranged on the U-shaped bracket.

5. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 4, characterized in that: The lower end of the pressing needle shaft is provided with a flange platform extending radially toward the outer circumference of the pressing needle shaft, and the lower end of the pressing needle spring is abutted against the flange platform.

6. A firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 3 or 4, characterized in that: The spring force of the needle pressing spring is smaller than the force that triggers the primer to ignite.

7. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 5, characterized in that: The detection switch is a proximity switch or a photoelectric switch.

8. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 7, characterized in that: The proximity switch is arranged in the middle of the U-shaped bracket and is spaced apart from the pressing needle shaft.

9. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 7, characterized in that: A pair of photoelectric switches are respectively arranged on both sides of the U-shaped bracket, and the detection light paths of the pair of photoelectric switches intersect the axis of the pressure needle shaft vertically.

10. The firing pin feeding detection mechanism for a needle puncture sensitivity tester according to claim 9, characterized in that: The firing pin feeding detection mechanism also includes a manual lifting and adjusting module, which is arranged at one end of the detection fixing plate, and the single-axis telescopic module is arranged on the telescopic end of the manual lifting and adjusting module. A detection scale is arranged on one side of the detection fixing plate.

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