A tooling for detecting misalignment of the barrel assembly mounting bracket of a multi-barrel gun.
By designing a testing fixture for multi-barrel cannons, and using a measuring rod and positioning plate in conjunction with a dial indicator to detect the offset of the barrel assembly mounting bracket, the problem of reduced firing accuracy of multi-barrel cannons was solved, enabling rapid testing and adjustment, and improving firing accuracy and operational efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGAN AUTOMOBILE (GRP) CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
AI Technical Summary
After firing, the barrel assembly mounting bracket of a multi-barrel cannon may shift due to temperature changes, affecting firing accuracy. Current technology lacks effective on-site testing methods, resulting in long return-to-factory repair times and reduced usage frequency.
Design a testing fixture that includes a base, a measuring rod, a positioning plate, and a dial indicator. The measuring rod passes through the round hole at the front end of the barrel assembly mounting bracket, and the offset is measured by the positioning plate and the dial indicator. This allows for the rapid detection and adjustment of the offset of the barrel assembly mounting bracket.
It enables rapid detection and adjustment of the barrel assembly mounting bracket offset at the multi-barrel gun usage site, ensuring consistent rotation center, improving firing accuracy and destructive power, simplifying maintenance procedures, and facilitating portability and use.
Smart Images
Figure CN224455624U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of maintenance and testing devices for multi-barrel guns, specifically to a testing fixture for the offset of the barrel assembly mounting bracket of a multi-barrel gun. Background Technology
[0002] Currently, multi-barreled howitzers used for terminal defense are designed to counter low-altitude penetration by aircraft, helicopters, and drones. These howitzers typically have six barrels, secured by a barrel assembly mounting bracket, which is mounted on a traveling mechanism via a cradle. After frequent use, the temperature generated by firing causes the barrel assembly mounting bracket to shift, resulting in the six barrels shifting with the bracket. This shift in the barrel assembly's rotation center affects firing accuracy, significantly reducing its destructive power. Once reduced accuracy is detected, the equipment must be returned to the factory for repair, which is time-consuming and severely impacts the frequency of use. To reduce the time and manpower wasted on factory repairs, a detection fixture is needed to detect barrel assembly bracket shifting on-site at the multi-barreled howitzer's deployment location. Summary of the Invention
[0003] To address the aforementioned problems, this utility model provides a testing fixture for the barrel assembly mounting bracket of a multi-barrel gun. It can quickly detect the offset of the barrel assembly mounting bracket, facilitating subsequent adjustments to the mounting bracket and ensuring that the rotation center of the barrel assembly is aligned with the cradle, thereby ensuring its firing accuracy.
[0004] The technical solution of this utility model is as follows: a testing fixture for a barrel assembly mounting bracket of a multi-barrel gun, comprising a base, a measuring rod, a positioning plate, and a dial indicator. Support legs are respectively provided on both the front and rear ends of the base. Two mounting bases are provided on the base. The rear end of the measuring rod is fixed to the mounting base. The front end of the measuring rod extends forward to pass through the front circular hole of the barrel assembly mounting bracket. The radius of the positioning plate is the same as the radius of the front circular hole of the barrel assembly mounting bracket. An assembly hole is provided at the center of the positioning plate, and the diameter of the assembly hole matches the diameter of the front end of the measuring rod. A notch is provided on the circumference of the positioning plate, communicating with the assembly hole. This notch allows the top rod of the dial indicator to be inserted and contact the front end of the measuring rod to measure the offset of the barrel assembly mounting bracket.
[0005] Preferably, the measuring rod is a stepped rod, comprising a first small diameter section, a large diameter section, and a second small diameter section, wherein a mounting bushing is provided on the first small diameter section.
[0006] Preferably, the end of the larger diameter section near the first smaller diameter section is provided with a reinforcing rib.
[0007] Preferably, the large-diameter section is a hollow rectangular tube, and the large-diameter section is connected to the first small-diameter section and the second small-diameter section by welding.
[0008] Preferably, the notch of the positioning disk is a V-shaped notch, and the notch is a minor arc with an arc angle of less than 45°.
[0009] Preferably, the clearance between the positioning plate and the measuring rod is less than 0.05 mm, and the clearance between the positioning plate and the outlet of the barrel assembly mounting bracket is less than 0.05 mm.
[0010] Preferably, the positioning disk is provided with multiple weight-reducing holes.
[0011] The advantages of this invention are that it detects the offset of the barrel assembly mounting bracket and then adjusts the mounting bracket with shims to make its rotation center consistent with the cradle, thereby ensuring that the rotation center of the barrel assembly is consistent with the cradle, thus ensuring its firing accuracy and power. This invention has a simple structure, is easy to carry, and can quickly detect the offset of the barrel assembly mounting bracket at the site of use of multi-barrel cannons, which facilitates the maintenance, repair and debugging of multi-barrel cannons. Attached Figure Description
[0012] Figure 1 This is a front view structural diagram of the present utility model;
[0013] Figure 2 This is a top view of the structure of this utility model;
[0014] Figure 3 This is a schematic diagram of the measuring rod structure of this utility model;
[0015] Figure 4 This is a schematic diagram of the calibration disk structure of this utility model;
[0016] Figure 5 This is an assembly diagram of the gun barrel assembly mounting bracket for detecting offset according to this utility model. Detailed Implementation
[0017] See Figures 1 to 5A testing fixture for a barrel assembly mounting bracket of a multi-barrel gun includes a base 1, a measuring rod 4, a positioning plate 2, and a dial indicator. Support legs 11 are respectively provided on the front and rear sides of the base 1. Two mounting bases 3 are provided on the base 1. The rear end of the measuring rod 4 is fixed to the mounting base 3. The front end of the measuring rod 4 extends forward to pass through the front circular hole 51 of the barrel assembly mounting bracket 5. The measuring rod 4 is a stepped rod, including a first small-diameter section 41, a large-diameter section 42, and a second small-diameter section 43. The first small-diameter section 41 is provided with a mounting bushing 411 for fixing with the mounting base 3. The end of the large-diameter section 42 near the first small-diameter section 41 is provided with a reinforcing rib 421 to ensure the strength of the large-diameter section 42 and prevent it from being bent or even broken when positioned by the positioning plate 2. The large-diameter section 42 is a hollow rectangular tube. The large-diameter section 42 is welded to the first small-diameter section 41 and the second small-diameter section 43 to save costs. Preferably, the large-diameter section 42, the first small-diameter section 41, and the second small-diameter section 43 are integrally formed. The large-diameter section 42 has a length of 1360mm, a wall thickness of 3mm, a cross-sectional length of 50mm, and a cross-sectional width of 30mm, ensuring that the large-diameter section 42 has a certain elastic deformation capability when positioned by the positioning plate 2. The radius of the positioning plate 2 is the same as the radius of the front circular hole 51 of the barrel assembly mounting bracket 5. An assembly hole 21 is provided at the center of the positioning plate 2, and the diameter of the assembly hole 21 matches the diameter of the front end of the measuring rod 4. A notch 22 is provided on the circumference of the positioning plate 2, communicating with the assembly hole 21. This notch allows the dial indicator's push rod to be inserted and contact the front end of the measuring rod 4 to measure the offset of the barrel assembly mounting bracket 5. The notch 22 of the positioning disk 2 is a V-shaped notch with a minor arc, the curvature being less than 45°, to avoid excessive curvature that could lead to inaccurate positioning. The clearance between the positioning disk 2 and the measuring rod 4 is less than 0.05mm, and the clearance between the positioning disk 2 and the front circular hole 51 of the barrel assembly mounting bracket 5 is less than 0.05mm. This design aims to ensure accurate positioning of the positioning disk 2. The positioning disk 2 is provided with multiple weight-reducing holes 23 to reduce its weight and save manufacturing costs.
[0018] The usage process of this utility model is as follows:
[0019] 1) Place the base of this utility model into the slide groove of the rocker arm and position it using the support legs;
[0020] 2) Fix the rear end of the measuring rod to the mounting base of the base, and make the front end of the measuring rod pass through the front round hole of the barrel assembly mounting bracket.
[0021] 3) Install the dial indicator on the fixed frame on the traveling device, so that the top rod of the dial indicator is against the horizontal direction of the front end of the measuring rod, and then zero the dial indicator;
[0022] 4) Align the notch of the positioning plate with the dial indicator top rod, then insert the positioning plate from the front end of the measuring rod and make the positioning plate fit against the front round hole of the barrel assembly mounting bracket. Record the dial indicator data at this time. This data is the horizontal offset of the barrel assembly mounting bracket.
[0023] 5) Remove the positioning plate, place the dial indicator's push rod against the vertical direction of the measuring rod's front end, and then zero the dial indicator;
[0024] 6) Align the notch of the positioning plate with the dial indicator top rod, then insert the positioning plate from the front end of the measuring rod and make the positioning plate fit against the front round hole of the barrel assembly mounting bracket. Record the dial indicator data at this time. This data is the vertical offset of the barrel assembly mounting bracket.
[0025] According to the requirements, the horizontal and vertical offset of the gun barrel assembly mounting bracket should both be within 0.05mm. If the horizontal and vertical offsets are greater than 0.05mm during the test, the corresponding offsets should be adjusted by shims to ensure that they meet the requirements.
[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A detection tool for detecting misalignment of a barrel set mounting frame of a multi-barreled gun, characterized by: The device includes a base (1), a measuring rod (4), a positioning plate (2), and a dial indicator. The base (1) has legs (11) on both the front and rear sides. Two mounting bases (3) are provided on the base (1). The rear end of the measuring rod (4) is fixed on the mounting base (3). The front end of the measuring rod (4) extends forward to pass through the front end circular hole (51) of the barrel assembly mounting bracket (5). The radius of the positioning plate (2) is the same as the radius of the front end circular hole (51) of the barrel assembly mounting bracket (5). The center of the positioning plate (2) is provided with an assembly hole (21). The diameter of the assembly hole (21) matches the diameter of the front end of the measuring rod (4). A notch (22) is provided on the circumference of the positioning plate (2). The notch (22) communicates with the assembly hole (21). The notch allows the top rod of the dial indicator to be inserted and contact the front end of the measuring rod (4) to measure the offset of the barrel assembly mounting bracket (5).
2. The tool for detecting the offset of the mounting frame of the barrel group of the multi-barrel cannon according to claim 1, characterized in that: The measuring rod (4) is a stepped rod, including a first small diameter section (41), a large diameter section (42), and a second small diameter section (43). The first small diameter section (41) is provided with a mounting bushing (411).
3. The tool for detecting the offset of the mounting frame of the barrel group of the multi-barrel cannon according to claim 2, characterized in that: The large-diameter section (42) is provided with a reinforcing rib (421) at one end near the first small-diameter section (41).
4. The tool for detecting the offset of the mounting rack of the barrel group of the multi-barrel cannon according to claim 2, characterized in that: The large diameter section (42) is a hollow rectangular tube, and the large diameter section (42) is connected to the first small diameter section (41) and the second small diameter section (43) by welding.
5. The detection fixture for the offset of the barrel assembly mounting bracket of a multi-barrel gun according to claim 1, characterized in that: The notch (22) of the positioning disk (2) is a V-shaped notch, and the notch (22) is a minor arc with an arc of less than 45°.
6. The tool for detecting the offset of the mounting rack of the barrel group of a multi-barrel cannon according to claim 1, characterized in that: The gap between the positioning plate (2) and the measuring rod (4) is less than 0.05 mm, and the gap between the positioning plate (2) and the front end round hole (51) of the barrel assembly mounting bracket (5) is less than 0.05 mm.
7. The tool for detecting the offset of the mounting rack of the barrel group of the multi-barrel gun according to claim 1, characterized in that: The positioning disk (2) is provided with multiple weight reduction holes (23).