Cartridge case material evidence clamping and fixing mechanism for bullet mark detection

Abstract

The utility model relates to the technical field of bullet mark detection, and discloses a bullet case material evidence clamping and fixing mechanism for bullet mark detection, which comprises a working table, brackets are mounted on two sides of the working table, screw rods are mounted in the brackets, matched sliding blocks are slidably arranged on the screw rods, and mounting plates are fixed at the bottom ends of the inner walls of the sliding blocks; a bracket is integrally fixed to the bottom end of the inner wall of the mounting plate, and sector gears are symmetrically and rotationally arranged on the bracket. Through the combined arrangement of the sector gear, the connecting bent rod, the connector, the movable frame and the positioning clamping block, the movable frame can rotate by an adaptive angle in the connector according to the shape and size of a material evidence, it is ensured that the positioning clamping block can be tightly attached to the outer wall of the material evidence, the material evidence of different shapes and sizes can be effectively coped with through a self-adaptive clamping mode, and the practicability is high. The problem that clamping is not stable due to the fact that a traditional clamping device is difficult to be accurately matched with the appearance of the material evidence is solved, and the fixing effect on the material evidence is greatly enhanced.

Description

Technical Field

[0001] This application relates to the field of bullet hole detection technology, and in particular to a bullet casing evidence clamping and fixing mechanism for bullet hole detection. Background Technology

[0002] As a crucial type of physical evidence, cartridge cases contain a wealth of information related to firearm use and crime scenes. Bullet mark detection is a core method for uncovering this information and reconstructing the truth of a case, and precise and stable cartridge case clamping is the cornerstone of ensuring the reliability of bullet mark detection results. However, most traditional cartridge case clamping devices use rigid, inflexible clamps with fixed structures, lacking the ability to flexibly adjust according to the actual shape and size of the cartridge case. When handling small, delicate cartridge cases, the clamping components are difficult to position precisely, easily causing over-clamping and damaging the minute marks on the cartridge case surface. Faced with the special clamping requirements of large, irregularly shaped cartridge cases, existing equipment is helpless, unable to achieve stable and comprehensive clamping, requiring a significant amount of time for manual adjustment and assembly of the clamps, resulting in low efficiency and seriously hindering the efficient progress of the detection process.

[0003] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0004] To address the problem that most traditional cartridge case clamping devices use clamps with poor versatility and rigid structures, and are mostly fixed in structure, lacking the ability to flexibly adjust according to the actual shape and size of the cartridge case, this application provides a cartridge case evidence clamping and fixing mechanism for bullet mark detection.

[0005] The bullet casing evidence clamping and fixing mechanism for bullet hole detection provided in this application adopts the following technical solution:

[0006] A cartridge case evidence clamping and fixing mechanism for bullet hole detection includes a worktable, with brackets installed on both sides of the worktable. A lead screw is installed inside the bracket, and a matching slider is slidably mounted on the lead screw. A mounting plate is fixed to the bottom end of the inner wall of the slider, and a bracket is integrally fixed to the bottom end of the inner wall of the mounting plate. A sector gear rotates symmetrically on the bracket, and a connecting bent rod is fixed to the outer wall of each of the two sector gears. A movable frame is provided on the connecting bent rod.

[0007] Preferably, a sliding rod is fixed to the bottom of the inner wall of the bracket, and a matching sliding sleeve is slidably installed on the outside of the sliding rod.

[0008] Preferably, the top end of the adapter sleeve is fixed to the bottom of the slider, a motor is installed on the outer wall of the bracket, and the output end of the motor is driven by a lead screw.

[0009] Preferably, a servo motor is fixedly mounted on one side of the inner wall of the mounting plate, and the output end of the servo motor is driven by one of the sector gears.

[0010] Preferably, each of the two connecting rods has a connector fixed at one end that is close to the other, and the connector has a through hole inside.

[0011] Preferably, the movable frame is rotatably connected to the inner wall of the through hole, and positioning clamping blocks are fixed at both ends of the movable frame.

[0012] In summary, this application includes the following beneficial technical effects:

[0013] This application utilizes a combination of a sector gear, a connecting rod, a connector, a movable frame, and a positioning clamping block. The movable frame can rotate within the connector to adapt to the shape and size of the evidence, ensuring the positioning clamping block fits snugly against the outer wall of the evidence. This adaptive clamping method effectively handles evidence of different shapes and sizes, overcoming the problem of unstable clamping caused by the difficulty of accurately matching the shape of evidence in traditional clamping devices. This significantly enhances the fixation effect on the evidence, preventing displacement or shaking during subsequent testing. Attached Figure Description

[0014] Figure 1 This is a front view of a bullet casing evidence clamping and fixing mechanism for bullet hole detection according to an embodiment of the application.

[0015] Figure 2 This is a schematic diagram of the workbench structure in the embodiment of the application.

[0016] Figure 3 This is a schematic diagram of the positioning clamping block in the embodiment of the application.

[0017] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Support; 3. Lead screw; 4. Slider; 5. Adaptive sleeve; 6. Slide rod; 7. Mounting plate; 8. Motor; 9. Bracket; 10. Sector gear; 11. Connecting bent rod; 12. Connector; 13. Movable frame; 14. Positioning clamping block; 15. Servo motor. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-3 This application is described in further detail.

[0019] This application discloses a cartridge case evidence clamping and fixing mechanism for bullet hole detection. (Refer to...) Figure 1-Figure 2The system includes a workbench 1, with supports 2 installed on both sides of the workbench 1. A lead screw 3 is installed inside each support 2, and a matching slider 4 slides on the lead screw 3. A sliding rod 6 is fixed to the bottom of the inner wall of the support 2, and a matching adapter sleeve 5 is slidably installed outside the sliding rod 6. The top of the adapter sleeve 5 is fixed to the bottom of the slider 4. A motor 8 is installed on the outer wall of the support 2, and the output end of the motor 8 is driven by the lead screw 3. During the process of adjusting the position of the mounting plate 7 through the lead screw 3 and other components, thereby changing the evidence clamping distance, the adapter sleeve 5 will simultaneously slide outside the sliding rod 6 for positioning, ensuring the stability of the entire structure during adjustment and avoiding instability such as displacement or shaking due to position adjustment.

[0020] like Figure 3 As shown, a mounting plate 7 is fixed to the bottom of the inner wall of the slider 4. A bracket 9 is fixed to the bottom of the inner wall of the mounting plate 7 in an integral structure. A sector gear 10 rotates symmetrically on the bracket 9. A servo motor 15 is fixed to one side of the inner wall of the mounting plate 7. The output end of the servo motor 15 is driven by one of the sector gears 10. The sector gear 10 is driven to rotate by the servo motor 15. Through the transmission of the connecting bent rod 11, the positioning clamping block 14 at the end of the movable frame 13 can be pushed to stick to the outer wall of the evidence to achieve clamping.

[0021] In this application, connecting rods 11 are fixed to the outer walls of the two sector gears 10. Connecting heads 12 are fixed to the ends of the two connecting rods 11 that are close to each other. A through hole is opened inside the connecting head 12. A movable frame 13 is rotatably installed on the inner wall of the through hole. Positioning clamping blocks 14 are fixed to both ends of the movable frame 13. According to the shape and size of the evidence, the movable frame 13 can rotate within the connecting head 12 to adapt the angle, ensuring that the positioning clamping blocks 14 can fit tightly against the outer wall of the evidence and achieve a good positioning effect.

[0022] The implementation principle of the bullet casing evidence clamping and fixing mechanism for bullet hole detection in this application embodiment is as follows:

[0023] During testing, the evidence containing the cartridge case is placed on the workbench 1, positioned as close to the center as possible. Then, the servo motor 15 drives one of the sector gears 10 to rotate, which in turn meshes with the other sector gear 10. This drives the connecting rods 11 on both sides to rotate relative to each other, pushing the positioning clamping block 14 at the end of the movable frame 13 to press against the outer wall of the evidence containing the cartridge case. At this point, depending on the shape and size of the evidence, the movable frame 13 will rotate within the connector 12 to an appropriate angle, facilitating a tight clamping against the outer wall of the evidence. Simultaneously, the motor 8 drives the lead screw 3 to rotate, which in turn pushes the mounting plate 7 to one side via the slider 4, adjusting the clamping distance and facilitating position adjustment. The adapter sleeve 5 slides synchronously outside the slider 6 for positioning, improving overall stability, preventing deviation, expanding the applicability of the device, and enhancing testing efficiency and effectiveness, ensuring comprehensive and thorough testing.

[0024] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0025] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0026] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cartridge case evidence clamping and fixing mechanism for bullet hole detection, comprising a worktable (1), characterized in that: The workbench (1) is equipped with brackets (2) on both sides. A lead screw (3) is installed inside the bracket (2). A matching slider (4) is slidably mounted on the lead screw (3). A mounting plate (7) is fixed to the bottom of the inner wall of the slider (4). A bracket (9) is fixed to the bottom of the inner wall of the mounting plate (7) in an integral structure. A sector gear (10) rotates symmetrically on the bracket (9). A connecting bent rod (11) is fixed to the outer wall of each of the two sector gears (10). A movable frame (13) is provided on the connecting bent rod (11).

2. The bullet casing evidence clamping and fixing mechanism for bullet mark detection according to claim 1, characterized in that: The bottom of the inner wall of the bracket (2) is fixed with a sliding rod (6), and a matching sliding sleeve (5) is slidably installed on the outside of the sliding rod (6).

3. The bullet casing evidence clamping and fixing mechanism for bullet mark detection according to claim 2, characterized in that: The top of the adapter sleeve (5) is fixed to the bottom of the slider (4), and a motor (8) is installed on the outer wall of the bracket (2). The output end of the motor (8) is driven by the lead screw (3).

4. The bullet casing evidence clamping and fixing mechanism for bullet hole detection according to claim 1, characterized in that: A servo motor (15) is fixedly installed on one side of the inner wall of the mounting plate (7), and the output end of the servo motor (15) is driven by one of the sector gears (10).

5. The bullet casing evidence clamping and fixing mechanism for bullet mark detection according to claim 1, characterized in that: Each of the two connecting rods (11) has a connector (12) fixed at one end close to the other, and the connector (12) has a through hole inside.

6. The bullet casing evidence clamping and fixing mechanism for bullet mark detection according to claim 5, characterized in that: The movable frame (13) is rotatably connected to the inner wall of the through hole, and both ends of the movable frame (13) are fixed with positioning clamping blocks (14).

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