Special assembly fixture for artillery ammunition magazine

Abstract

This utility model discloses a special assembly fixture for artillery ammunition storage cylinders. A positioning shaft is fixed to the center of a base plate. To the right of the positioning shaft, a stop block II is fixed to the base plate, and to the left rear of the positioning shaft, a stop block I is fixed to the base plate. The positioning shaft passes through the ammunition storage cylinder, and the rear sleeve of the cylinder is placed between stop blocks II and stop block I. Between the rear sleeve and sleeve I, two clamping blocks are provided on the outside of the ammunition storage cylinder. Between sleeves I and II, three support sleeves are provided on the outside of the ammunition storage cylinder. The shaft passes through one of the support sleeves and the small round holes at the corners of sleeves I and II. A positioning groove is provided at the bottom of the end cap. Above the positioning groove, a through hole is provided in the center of the end cap, and a pin hole A is provided on one side of the through hole. The end cap is installed with the front sleeve at the upper end of the ammunition storage cylinder through the positioning groove. Fastening bolts pass through the through hole and are fixed to the upper end of the positioning shaft, and positioning pins pass through pin hole A and are fixed to the upper end of the positioning shaft. This utility model effectively solves the problems of poor adaptability and cumbersome operation of general-purpose fixtures.

Description

Technical Field

[0001] This utility model relates to a special assembly fixture for artillery ammunition storage tubes, belonging to the field of mechanical technology. Background Technology

[0002] In the assembly process of specific artillery magazines, existing general-purpose clamps suffer from problems such as complex structure and insufficient positioning specificity, mainly in the following aspects: 1. The elastic clamping mechanism of the general-purpose clamp has poor adaptability to the rigid positioning of a specific ammunition storage cylinder, and is prone to deformation of the cylinder wall due to over-clamping; 2. The modular design introduces redundant adjustment mechanisms, which increases positioning errors during assembly and makes operation cumbersome, making it difficult to meet the high-precision assembly requirements of specific ammunition storage cylinders.

[0003] Therefore, it is of great significance to design a specialized assembly fixture with a simplified structure and precise positioning for a single-specification ammunition storage cylinder. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a special assembly fixture for artillery ammunition storage cylinders. This fixture achieves precise rigid positioning through a customized positioning structure, solving the problems of poor adaptability and cumbersome operation of general-purpose fixtures, and improving the assembly efficiency and accuracy of specific ammunition storage cylinders.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a special assembly fixture for artillery ammunition storage tubes, including a body, a stop block I, a stop block II, a clamping block, a shaft, a support sleeve, an end cap, fastening bolts and positioning pins. The body includes a base plate and a positioning shaft. The positioning shaft is vertically fixed at the center of the base plate. On the right side of the positioning shaft, a rectangular stop block II is fixed on the base plate. On the left rear side of the positioning shaft, an L-shaped stop block I is fixed on the base plate.

[0006] The positioning shaft is inserted into the ammunition storage cylinder, and the rear sleeve on the bottom end of the ammunition storage cylinder is fitted into the stop block II and the stop block I; between the rear sleeve and the sleeve I of the ammunition storage cylinder, two semi-circular arc-shaped clamps are provided on the outside of the ammunition storage cylinder, and the two clamps fit against the rear sleeve and the sleeve I.

[0007] Between sleeve I and sleeve II of the ammunition storage tube, three evenly spaced and vertically arranged support sleeves are provided on the outside of the ammunition tube. The support sleeves are inserted into one of the support sleeves and the small round holes at the corners of sleeve I and sleeve II. The support sleeves are in close contact with sleeve I and sleeve II.

[0008] The bottom of the end cap has a circular positioning groove with the opening facing downwards. Above the positioning groove, at the center of the top of the end cap, there is a through hole communicating with the positioning groove. On one side of the through hole, there is a pin hole A communicating with the positioning groove in the end cap. The end cap is installed by engaging with the front sleeve at the upper end of the ammunition storage cylinder through the positioning groove.

[0009] The fastening bolts are fitted through the through hole and fixedly connected to the upper end of the positioning shaft, and the positioning pins are fitted through the pin hole A and fixed to the upper end of the positioning shaft.

[0010] Furthermore, a horizontal handle is installed in the head of the fastening bolt.

[0011] Furthermore, the positioning shaft includes a shaft body and a plug. The shaft body is a hollow tube, and the plug is fixed at the upper end of the shaft body, flush with the top of the shaft body. A threaded hole is provided at the center of the plug, and a pin hole B is provided in the plug on one side of the threaded hole. The fastening bolt is threadedly connected to the threaded hole, and the positioning pin is inserted into the pin hole B.

[0012] Furthermore, a circular hole is provided at the center of the base plate. On the right side of the circular hole, a rectangular notch a is provided in the base plate. On the left rear side of the circular hole, an L-shaped notch b is provided in the base plate. Block I is fixedly installed in notch b, and block II is fixedly installed in notch a.

[0013] Furthermore, the through hole is located at the center of the positioning groove.

[0014] Furthermore, the curvature of the clamping block matches that of the outer wall of the cartridge.

[0015] Furthermore, pin hole A and pin hole B are on the same center line and have the same size, and through hole and threaded hole are on the same center line.

[0016] The beneficial effects of this utility model are as follows: It boasts high positioning accuracy. The customized L-shaped stop, end cap positioning groove, and radial positioning shaft form a three-dimensional rigid positioning system of "surface-hole-point," ensuring that the coaxiality error between the ammunition storage tube and the artillery base is ≤0.2mm and the perpendicularity error is ≤0.01°, meeting high-precision assembly requirements. Operation is efficient; there is no need to adjust the elastic structure or replace modules. The ammunition storage tube is directly inserted into the positioning shaft, and the sleeve of the ammunition storage tube is pushed in along the reference surface of the L-shaped stop. The axial positioning block and radial positioning shaft automatically align. The end cap and radial positioning shaft are connected by a positioning pin, and the front sleeve automatically aligns. The single assembly positioning time is ≤10 minutes, improving efficiency by more than 50% compared to general-purpose fixtures. The structure is stable and reliable. The mechanical locking mechanism achieves rigid clamping through fastening bolts, avoiding the deformation risk of elastic clamping. Furthermore, the positioning components have no redundant moving parts, reducing error sources during assembly and making it suitable for repetitive positioning in mass production. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the main body of this utility model.

[0020] Figure 3 yes Figure 2 A-A direction diagram.

[0021] Figure 4 This is the front view of the ammunition storage cylinder.

[0022] Figure 5 This is a three-dimensional schematic diagram of the ammunition storage tube.

[0023] Figure 6 This is a schematic diagram of the positioning shaft of this utility model.

[0024] Figure 7 yes Figure 6 The right view.

[0025] Figure 8 This is a schematic diagram of the base plate of this utility model.

[0026] Figure 9 This is a schematic diagram of the clamping block of this utility model.

[0027] Figure 10 This is a cross-sectional view of the end cap of this utility model.

[0028] Figure 11 yes Figure 10 A bottom-view diagram.

[0029] Figure 12 This is a schematic diagram of the support sleeve of this utility model.

[0030] Figure 13 This is a schematic diagram of the shaft of this utility model.

[0031] Numbering on the map: 1. Body, 101. Base plate, 1011. Round hole, 1012. Notch a, 1013. Notch b, 102. Positioning shaft, 1021. Shaft body, 1022. Plug, 1023. Threaded hole, 1024. Pin hole B, 2. Stop block I, 3. Stop block II, 4. Clamping block, 5. Shaft, 6. Support sleeve, 7. End cover, 701. Positioning groove, 702. Through hole, 703. Pin hole A, 8. Fastening bolt, 9. Handle, 10. Positioning pin, 11. Memory cartridge, 1101. Memory cartridge, 1102. Rear sleeve, 1103. Front sleeve, 1104. Sleeve I, 1105. Sleeve II. Detailed Implementation

[0032] like Figure 1As shown in Figure 13, a special assembly fixture for artillery ammunition storage cylinders includes a body 1, a stop block I 2, a stop block II 3, a clamping block 4, a shaft 5, a support sleeve 6, an end cap 7, fastening bolts 8, and a positioning pin 10. The body 1 includes a base plate 101 and a positioning shaft 102. The positioning shaft 102 includes a shaft body 1021 and a plug 1022. The shaft body 1021 is a hollow tube. The plug 1022 is fixed at the upper end of the shaft body 1021 and is flush with the top of the shaft body 1021. A threaded hole 1023 is provided at the center of the plug 1022, and a pin is provided in the plug 1022 on one side of the threaded hole 1023. Hole B1024; A circular hole 1011 is provided at the center of the base plate 101. On the right side of the circular hole 1011, a rectangular notch a1012 is provided in the base plate 101. On the left rear side of the circular hole 1011, an L-shaped notch b1013 is provided in the base plate 101. The positioning shaft 102 is vertically fixed at the center of the base plate 101. On the right side of the positioning shaft 102, a rectangular stop block I2 is fixed on the base plate 101. The stop block I2 is fixedly installed in the notch b1013. On the left rear side of the positioning shaft 102, an L-shaped stop block I2 is fixed on the base plate 101. The stop block II3 is fixedly installed in the notch a1012.

[0033] The positioning shaft 102 is inserted into the cartridge 1101 of the cartridge 11. The rear sleeve 1102 on the bottom end of the cartridge 11 is placed in the stop block II 3 and the stop block I 2. Between the rear sleeve 1102 and the sleeve I 1104 of the cartridge 11, two semi-circular arc-shaped clamping blocks 4 are provided on the outside of the cartridge 1101. The clamping blocks 4 are consistent with the curvature of the outer wall of the cartridge 1101. The two clamping blocks 4 are in close contact with the rear sleeve 1102 and the sleeve I 1104.

[0034] Between the sleeve I 1104 and sleeve II 1105 of the ammunition storage tube 11, three evenly spaced and vertically arranged support sleeves 6 are provided on the outside of the ammunition tube 1101. The shaft 5 is fitted into one of the support sleeves 6 and the small round hole at the corner of sleeve I 1104 and the small round hole at the corner of sleeve II 1105. The support sleeve 6 is in close contact with sleeve I 1104 and sleeve II 1105.

[0035] The bottom of the end cap 7 is provided with a circular positioning groove 701 facing downwards. Above the positioning groove 701, at the center of the top of the end cap 7, there is a through hole 702 communicating with the positioning groove 701. The through hole 702 is located at the center of the positioning groove 701. On one side of the through hole 702, the end cap 7 is provided with a pin hole A703 communicating with the positioning groove 701. The end cap 7 is installed by cooperating with the front sleeve 1103 at the upper end of the ammunition storage cylinder 11 through the positioning groove 701.

[0036] The pin hole A703 and the pin hole B1024 are on the same center line and have the same size. The through hole 702 and the threaded hole 1023 are on the same center line. The fastening bolt 8 is threaded through the through hole 702 and threaded into the threaded hole 1023 on the plug 1022. The positioning pin 10 is inserted into the pin hole A703 and the pin hole B1024 and fixed. A horizontal handle 9 is installed in the head of the fastening bolt 8.

[0037] The circular hole 1011 at the center of the base plate 101 is used to assemble the positioning shaft 1021. After the base plate 101 and the positioning shaft 101 are assembled, they are pre-welded, and the perpendicularity is checked by scribing. After the perpendicularity meets ≤0.05mm, the welding is completed. The base plate 101 has an L-shaped notch b1013 and a rectangular notch a1012 according to the assembly coordinates of the sleeve in the specific ammunition storage cylinder 11. The two notches are equipped with detachable stop blocks I2 and II3, which serve as the sleeve in the ammunition storage cylinder 11. The positioning reference surface of the hoop has a surface roughness of ≤3.2, serving as the basis for axial and radial positioning of the ammunition storage cylinder 11. The end cap 7, stop block I2, and stop block II3 form an axial positioning block. Stop block I2 and stop block II3 fix the rear hoop 1102 and hoop I1104 in the ammunition storage cylinder 11. The end cap 7 has a positioning groove 701 with a shape that matches the flange of the front hoop 1103 in the ammunition storage cylinder 11. The groove depth is consistent with the flange thickness, thereby achieving axial positioning of the ammunition storage cylinder 11.

[0038] The positioning shaft 102, shaft 5, and positioning pin 10 form a radial centering column. The positioning shaft 102 is set in the circular hole 1011 of the base plate 101. The axis of the positioning shaft 102 is coaxial with the theoretical axis of the ammunition storage cylinder 11. The diameter of the positioning shaft 102 and the inner wall of the ammunition storage cylinder 11 have a clearance of ≤0.1mm. After being inserted into the cylinder, it forms a radially rigid centering. Since the circular holes at the corners of the sleeves I 1104 and II 1105 in the ammunition storage cylinder 11 are single-piece fixed-size, it is necessary to ensure that the circular holes at the corners are coaxial during the assembly and welding process. Shaft 5 is inserted into the circular holes at the corners of the two sleeves to radially fix the two sleeves. Small circular holes are machined on the end cover 7 and the positioning shaft 102 at the same time. The positioning pin 10 is inserted into the pin hole A703 of the end cover 7 and the pin hole B1024 of the positioning shaft 102 to radially rigidly fix the end cover 7.

[0039] The clamping block 4 and the support sleeve 6 form a height positioning block. To ensure the form and position relationship between the rear sleeve 1102 and sleeve I 1104 and sleeve II 1105, the clamping block 4 and the support sleeve 6 are set between the three sleeves. The fastening bolt 8 and the handle 9 on the end cover 7 form a mechanical locking device. By tightening the fastening bolt 8 with the handle 9, the front end of the ammunition storage cylinder 11 is rigidly pressed, and the radial centering column and the height positioning block form a three-dimensional fixation.

[0040] To improve the wear resistance of the positioning surfaces and ensure long-term accuracy, the surfaces of the base plate 101, stop block I2, stop block II3, shaft 5, positioning shaft 102, positioning pin 10, support sleeve 6 and end cover 7 are all carburized and quenched to a hardness ≥ HRC55.

[0041] In use, the cartridge 1101 of the ammunition storage cylinder 11 is fitted onto the positioning shaft 102. The rear sleeve 1102 and sleeve I 1104 are then installed on the cartridge 1101 in sequence. The height is controlled between sleeve I 1104 and the intermediate sleeve II 1105 using the clamping block 4. Then sleeve II 1105 is fitted, and the shaft 5 is inserted into the round hole at the corner end of sleeve I 1104 and the intermediate sleeve II 1105. The front sleeve 1103 is then fitted, the end cap 7 is assembled using the positioning pin 10, and the fastening bolt 8 is tightened using the handle 9.

[0042] Fixture installation: 1) After assembling the base plate 101 and the positioning shaft 102, pre-weld them first, check the verticality by scribing, and complete the welding after the verticality meets ≤0.05mm; insert the L-shaped stop block I2 and the rectangular stop block II into the L-shaped notch a1012 and the rectangular notch b1013 in the base plate 101 according to the assembly coordinates of the sleeve in the specific ammunition storage tube 11. 2) Based on the position of the rear sleeve 1102 in the ammunition storage cylinder 11, assemble the clamping block 4 to determine the position of sleeve I 1104. Insert the shaft 5 and the support sleeve 6 into the small round hole at the corner of sleeve I 1104 and the sleeve II 1105 to determine the position of sleeve II 1105. Through the above means, the assembly height of each sleeve on the ammunition storage cylinder 11 is determined.

[0043] Assembly process of ammunition storage tube 11: 1) Manually hold the ammunition storage cylinder 1101 and slowly insert it into the positioning shaft 102 until the inner wall of the ammunition storage cylinder 1101 is completely in contact with the positioning shaft 102. 2) Slowly push the rear sleeve 1102 and sleeve I 1104 of the ammunition storage tube 11 into the reference plane of the L-shaped stop I 2 and the rectangular stop II 3 along the outer circle of the ammunition tube 1101; 3) Slowly push the sleeve II 1105 of the ammunition storage tube 11 along the outer circle of the ammunition tube 1101, then insert the shaft 5 and a support sleeve 6 into the small round holes at the corners of the sleeve I 1104 and the sleeve II 1105, and place the other two support sleeves 6 between the sleeve I 1104 and the sleeve II 1105 until the planes of the sleeve I 1104 and the sleeve II 1105 are parallel. 4) Slowly push the front sleeve 1103 of the ammunition storage tube 11 into the outer circle of the ammunition tube 1101, and align the flanges of the ammunition tube 1101 and the front sleeve 1103 with the positioning groove 701 of the clamp end cover 7. 5) Check the assembly status of the ammunition cylinder 1101, front sleeve 1103, sleeve I 1104, sleeve II 1105 and rear sleeve 1102 in the ammunition storage cylinder 11. After confirming that there are no errors, tighten the final fastening bolts 8 to complete the assembly.

[0044] Fixture maintenance: Regularly inspect the wear of the reference surface of stop I2, the reference surface of stop II3, the positioning shaft 102 and the positioning pin 10. When the roughness of the positioning surface exceeds Ra3.2 or the diameter wear of the positioning shaft 102 and the positioning pin 10 is ≥0.01mm, grind and repair the positioning surface or replace the positioning shaft 102 and the positioning pin 10 to ensure long-term positioning accuracy.

Claims

1. A special assembly fixture for artillery ammunition storage cylinders, characterized in that: The system includes a body (1), a stop block I (2), a stop block II (3), a clamping block (4), a shaft (5), a support sleeve (6), an end cap (7), fastening bolts (8), and a positioning pin (10). The body (1) includes a base plate (101) and a positioning shaft (102). The positioning shaft (102) is vertically fixed at the center of the base plate (101). On the right side of the positioning shaft (102), a rectangular stop block II (3) is fixed on the base plate (101). On the left rear side of the positioning shaft (102), an L-shaped stop block I (2) is fixed on the base plate (101). The positioning shaft (102) is inserted into the cartridge (1101) of the ammunition storage cylinder (11), and the rear sleeve (1102) on the bottom end of the ammunition storage cylinder (11) is placed in the stop block II (3) and the stop block I (2); between the rear sleeve (1102) and the sleeve I (1104) of the ammunition storage cylinder (11), two semi-circular arc-shaped clamps (4) are provided on the outside of the ammunition storage cylinder (1101), and the two clamps (4) fit together with the rear sleeve (1102) and the sleeve I (1104) from top to bottom; Between the sleeve I (1104) and sleeve II (1105) of the ammunition storage tube (11), three evenly spaced and vertically arranged support sleeves (6) are provided on the outside of the ammunition tube (1101). The shaft (5) is inserted into one of the support sleeves (6) and the small round hole at the corner of sleeve I (1104) and the small round hole at the corner of sleeve II (1105). The support sleeve (6) is in close contact with sleeve I (1104) and sleeve II (1105) from top to bottom. A circular positioning groove (701) with the slot facing downward is provided in the bottom of the end cap (7). Above the positioning groove (701), a through hole (702) communicating with the positioning groove (701) is provided at the center of the top of the end cap (7). On one side of the through hole (702), a pin hole A (703) communicating with the positioning groove (701) is provided in the end cap (7). The end cap (7) is installed by cooperating with the front sleeve (1103) at the upper end of the ammunition storage cylinder (11) through the positioning groove (701). The fastening bolt (8) is fixedly connected to the upper end of the positioning shaft (102) by passing through the through hole (702), and the positioning pin (10) is fixedly connected to the upper end of the positioning shaft (102) by passing through the pin hole A (703).

2. The special assembly fixture for artillery ammunition storage tubes according to claim 1, characterized in that: A horizontal handle (9) is installed in the head of the fastening bolt (8).

3. The special assembly fixture for artillery ammunition storage tubes according to claim 1, characterized in that: The positioning shaft (102) includes a shaft body (1021) and a plug (1022). The shaft body (1021) is a hollow tube. The plug (1022) is fixed at the upper end of the shaft body (1021) and is flush with the top of the shaft body (1021). A threaded hole (1023) is provided at the center of the plug (1022). On one side of the threaded hole (1023), a pin hole B (1024) is provided in the plug (1022). The fastening bolt (8) is threadedly connected to the threaded hole (1023), and the positioning pin (10) is inserted into the pin hole B (1024).

4. A special assembly fixture for artillery ammunition storage tubes according to claim 1, characterized in that: A circular hole (1011) is provided at the center of the base plate (101). On the right side of the circular hole (1011), a rectangular notch a (1012) is provided in the base plate (101). On the left rear side of the circular hole (1011), an L-shaped notch b (1013) is provided in the base plate (101). Block I (2) is fixedly installed in notch b (1013), and block II (3) is fixedly installed in notch a (1012).

5. A special assembly fixture for artillery ammunition storage tubes according to claim 1, characterized in that: The through hole (702) is located at the center of the positioning groove (701).

6. A special assembly fixture for artillery ammunition storage tubes according to claim 1, characterized in that: The curvature of the clamping block (4) is consistent with that of the outer wall of the cartridge (1101).

7. A special assembly fixture for artillery ammunition storage tubes according to claim 1, characterized in that: The pin hole A (703) and the pin hole B (1024) are on the same center line and have the same size. The through hole (702) and the threaded hole (1023) are on the same center line.

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