Aerospace barrel housing fixture
By designing a fixture suitable for aerospace cylinder shells, and utilizing gear meshing and threaded connections to achieve the expansion and retraction of multiple sets of arc-shaped support plates, the problem of the lack of versatility of existing fixtures is solved, and the fixing efficiency and processing quality are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN ZECHUAN IND & TRADE CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-24
AI Technical Summary
Existing aerospace cylinder shell fixing fixtures lack versatility, requiring frequent replacement of fixing parts to adapt to cylinder shells of different sizes, resulting in low fixing efficiency and unstable processing quality.
A fixture comprising components such as a fixed base, a fixed platform, a movable cylinder, a rotating sleeve, a positioning support sleeve, and an arc-shaped support plate is designed. Through gear meshing and threaded connection, multiple sets of arc-shaped support plates can be radially expanded or retracted, providing uniform support and loosening, and adapting to cylinder shells with different inner diameter specifications.
It improves the fixing efficiency of aerospace cylinder shells, ensures processing quality, avoids cylinder shell displacement and deformation, has versatility, reduces tooling change frequency, and improves processing stability.
Smart Images
Figure CN224544304U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aerospace tooling, and in particular to a fixing tool for aerospace cylindrical shells. Background Technology
[0002] An existing patent (publication number: CN221494259U) discloses a fixing fixture for aerospace cylindrical shells, including a fixing component and a stepped shaft. The fixing component is an expandable cylindrical thin-walled structure with a through-hole on its inner side. The inner hole wall of the fixing component is a conical structure. The outer surface of the fixing component fits into the inner hole wall structure of the cylindrical shell. When the stepped shaft is installed in the fixing component, the fixing component expands, clamping and fixing the cylindrical shell. However, this device requires "fixing components of different sizes to process different cylindrical shells," lacking versatility. This necessitates frequent replacement of the fixing component size when fixing cylindrical shells of different sizes, reducing the fixing efficiency of aerospace cylindrical shells and presenting drawbacks. Summary of the Invention
[0003] This utility model addresses the aforementioned shortcomings of existing technologies by providing a versatile aerospace cylinder shell fixing fixture that is adaptable to fixing various specifications of cylinder shells, provides uniform support force to prevent processing deformation, ensures the fixed position of the cylinder shell during processing, guarantees processing quality, and improves the fixing efficiency of aerospace cylinder shells by reducing the frequency of tooling changes.
[0004] The objective of this utility model is achieved through the following technical solution:
[0005] A fixture for fixing an aerospace cylinder shell includes a fixed base, a fixed platform, a movable cylinder, a rotating sleeve, a positioning support sleeve, and an arc-shaped support plate. The fixed platform has an outer protective cover with multiple outer support sleeves. The fixed platform has an inner fixed column with multiple inner support sleeves. The inner support sleeves fit against the inner end of the rotating sleeve, and the outer end of the rotating sleeve fits against the outer support sleeves. A support rod connects the protective cover, outer support sleeves, rotating sleeve, and inner support sleeves in sequence. The support rod is connected to the outer support sleeve by an outer screw, which in turn connects to the outer support sleeve and the support rod in sequence. The support rod is connected to the inner support sleeve by an inner screw, which in turn connects to the inner support sleeve and the support rod in sequence. The rotating sleeve has a gear on its exterior and passes through the positioning support sleeve. The rotating sleeve is connected to the positioning support sleeve by a thread.
[0006] The positioning support sleeve of this utility model has a lever, the fixing platform has multiple sliding holes, the arc-shaped support plate has a lever groove, the lever groove and sliding holes are adapted to the lever, the lever passes through the sliding holes, the lever is connected to the lever groove, the arc-shaped support plate is externally connected to a rubber pad, and the lower part of the arc-shaped support plate is attached to the fixing platform.
[0007] The protective cover of this utility model is fitted with a movable cylinder on its inner side. The movable cylinder has a rotating wheel on its outer side and a toothed ring inside the movable cylinder. The toothed ring meshes with a gear and is connected to the gear.
[0008] The movable cylinder of this utility model has a mounting sleeve attached to the lower part of the fixed seat. The movable cylinder has a mounting sleeve connected to the outside of the bearing. The fixed seat is connected to the inside of the bearing. The fixed seat is connected to the fixed column. The fixed column has a square insert. The fixed seat has a square slot. The square insert is adapted to the square slot. The square insert is connected to the square slot. Beneficial effects
[0009] During the fixing operation, the aerospace cylinder shell is first placed on the upper part of the fixing platform, and multiple sets of arc-shaped support plates are placed inside the cylinder shell. Then, the rotating wheel drives the movable cylinder to rotate, driving the gear ring and each gear to mesh and move. The positive and negative threads between the rotating sleeve and the positioning support sleeve are used for positioning, so that the multiple sets of arc-shaped support plates synchronously expand or contract radially along the sliding hole direction of the fixing platform. This provides tension support and rapid release for the inner wall of the aerospace cylinder shell, ensuring the fixing of the aerospace cylinder shell and preventing displacement during processing. This improves the processing quality and is also flexible in structure, which can meet the fixing requirements of aerospace cylinder shells with different inner diameter specifications. It has versatility and improves the fixing efficiency of aerospace cylinder shells by reducing the frequency of tooling changes.
[0010] This invention features multiple sets of arc-shaped support plates evenly distributed axially to provide tension support from the inner wall of the cylindrical shell. This avoids thin-wall deformation caused by external obstruction and localized stress concentration of the cylindrical shell. In conjunction with rubber pads, it increases the frictional resistance and provides soft cushioning between the contact surfaces of the arc-shaped support plates and the inner wall of the cylindrical shell. This prevents scratches on the surface of the cylindrical shell and also prevents displacement of the cylindrical shell during processing, ensuring that the position of the cylindrical shell is fixed during processing and improving processing quality.
[0011] This utility model is highly versatile and can be adapted to fix various specifications of cylindrical shells. It provides uniform support force, avoids processing deformation, and ensures that the position of the cylindrical shell is fixed during processing. While ensuring processing quality, it also improves the fixing efficiency of aerospace cylindrical shells by reducing the frequency of tooling changes. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of a fixing fixture structure for an aerospace cylinder shell according to the present invention.
[0013] Figure 2 This is an exploded view of the fixing fixture structure for an aerospace cylinder shell according to the present invention.
[0014] Figure 3 This is a top view of a fixing fixture structure for an aerospace cylinder shell according to the present invention.
[0015] Figure 4 This is a cross-sectional view of a fixing fixture structure for an aerospace cylinder shell according to the present invention.
[0016] Figure 5 This is a schematic diagram of the arc-shaped support plate control structure described in this utility model.
[0017] Figure 6 This is a schematic diagram of the fixed platform and rotating sleeve structure described in this utility model. Detailed Implementation
[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
[0019] Example 1:
[0020] A fixture for fixing an aerospace cylinder shell includes a fixed base 01, a fixed platform 02, a movable cylinder 08, a rotating sleeve 13, a positioning support sleeve 17, and an arc-shaped support plate 21. The fixed platform 02 has an outer protective cover 03, and the protective cover 03 has multiple outer support sleeves 15. The fixed platform 02 has a fixed column 04 inside. The fixed column 04 has multiple inner support sleeves 16. The inner support sleeves 16 fit the inner end of the rotating sleeve 13, and the outer end of the rotating sleeve 13 fits the outer support sleeve 15. The support rod 14 is connected to the protective cover 03, the outer support sleeve 15, the rotating sleeve 13, and the inner support sleeve 16 in sequence. The support rod 14 is connected to the outer support sleeve 15 by the outer screw 23. The outer screw 23 is connected to the outer support sleeve 15 and the support rod 14 in sequence. The support rod 14 is connected to the inner support sleeve 16 by the inner screw 24. The inner screw 24 is connected to the inner support sleeve 16 and the support rod 14 in sequence. The rotating sleeve 13 has a gear 12 on the outside. The rotating sleeve 13 passes through the positioning support sleeve 17 and is connected to the positioning support sleeve 17 by a thread.
[0021] Example 2:
[0022] The positioning support sleeve 17 of this utility model has a lever 18, the fixed platform 02 has multiple sliding holes 20, and the arc-shaped support plate 21 has a lever groove 19. The lever groove 19 and the sliding holes 20 are adapted to the lever 18. The lever 18 passes through the sliding holes 20 and is connected to the lever groove 19. The arc-shaped support plate 21 is externally connected to a rubber pad 22, and the lower part of the arc-shaped support plate 21 is attached to the fixed platform 02. Multiple sets of arc-shaped support plates 21, evenly distributed in the axial direction, provide tension support from the inner wall of the cylinder shell, avoiding obstruction of the outer wall of the cylinder shell and thin-wall deformation caused by local stress concentration. In conjunction with the rubber pad 22, the frictional resistance and soft buffer between the contact surface of the arc-shaped support plate 21 and the inner wall of the cylinder shell are increased, avoiding scratches on the surface of the cylinder shell and preventing displacement of the cylinder shell during processing. This ensures that the position of the cylinder shell is fixed during processing and improves processing quality.
[0023] Example 3:
[0024] The protective cover 03 of this utility model has a movable cylinder 08 attached to its inner side. The movable cylinder 08 has a rotating wheel 07 on its outside and a toothed ring 11 inside. The toothed ring 11 meshes with the gear 12 and is connected to the gear 12. During the fixing operation, the aerospace cylinder shell is first placed on the upper part of the fixed platform 02, and multiple sets of arc-shaped support plates 21 are placed inside the cylinder shell. Then, the rotating wheel 07 drives the movable cylinder 08 to rotate, causing the toothed ring 11 to mesh and move with each gear 12. The positive and negative threads between the rotating sleeve 13 and the positioning support sleeve 17 are used for positioning, so that the multiple sets of arc-shaped support plates 21 synchronously expand or contract radially along the sliding hole 20 direction of the fixed platform 02, providing tension support and quick release for the inner wall of the aerospace cylinder shell, ensuring the fixation of the aerospace cylinder shell, avoiding displacement during processing, improving processing quality, and having a flexible structure that can meet the fixing requirements of aerospace cylinder shells with different inner diameter specifications. It has versatility and improves the fixing efficiency of aerospace cylinder shells by reducing the frequency of tooling changes.
[0025] Example 4:
[0026] The movable cylinder 08 of this utility model is fitted with a fixed seat 01 at its lower part. The movable cylinder 08 has a mounting sleeve 09, which is connected to the outside of the bearing 10. The fixed seat 01 is connected to the inside of the bearing 10. The fixed seat 01 is connected to a fixed column 04. The fixed column 04 has a square insert 05. The fixed seat 01 has a square slot 06. The square insert 05 is adapted to the square slot 06 and is connected to the square slot 06. This device has strong versatility and can be adapted to fix various specifications of cylinder shells. It provides uniform support force, avoids processing deformation, and ensures that the position of the cylinder shell is fixed during processing. While ensuring processing quality, it improves the fixing efficiency of aerospace cylinder shells by reducing the frequency of tooling changes.
[0027] Example 5:
[0028] Installation steps: First, assemble the fixed platform 02 structure. First, put the positioning sleeve 17 on the outside of the rotating sleeve 13 and connect it with the positioning sleeve through threads. Then, put both the rotating sleeve 13 and the positioning sleeve 17 into the protective cover 03, and let the lever 18 pass through the sliding hole 20. The outer end of the rotating sleeve 13 is in contact with the outer support sleeve 15, and the inner end of the rotating sleeve 13 is in contact with the inner support sleeve 16. Then, the support rod 14 passes through the protective cover 03, the outer support sleeve 15, and the rotating sleeve 13 in sequence until its inner end is embedded in the inner support sleeve 16. The support rod 14 is fixedly connected to the outer support sleeve 15 through the outer screw 23, and the support rod 14 is fixed to the inner support sleeve 16 through the inner screw 24. The 16 sets are fixedly connected. Finally, the arc-shaped support plate 21 is placed on the upper part of the fixed platform 02, and the lever 18 is embedded in the lever groove 19 and fixedly connected with the arc-shaped support plate 21. The lower surface of the arc-shaped support plate 21 is in contact with the upper surface of the fixed platform 02. After the fixed platform 02 structure is assembled, the movable cylinder 08 is placed on the upper part of the fixed seat 01, and the mounting sleeve 09 is embedded in the bearing 10. Finally, the fixed platform 02 is placed on the upper part of the fixed seat 01, and the fixed column 04 is fixedly connected with the fixed seat 01. The square insert 05 is embedded in the square slot 06, and the gear ring 11 is meshed with multiple sets of gears 12 to complete the installation.
[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A fixture for fixing aerospace cylindrical shells, characterized in that: The system includes a fixed base (01), a fixed platform (02), a movable cylinder (08), a rotating sleeve (13), a positioning support sleeve (17), and an arc-shaped support plate (21). The fixed platform (02) has a protective cover (03) on its exterior, and the protective cover (03) has multiple outer support sleeves (15). The fixed platform (02) has a fixed column (04) inside. The fixed column (04) has multiple inner sleeves (16). The inner sleeves (16) fit the inner end of the rotating sleeve (13). The outer end of the rotating sleeve (13) fits the outer sleeve (15). The support rod (14) is connected to the protective cover (03), the outer sleeve (15), the rotating sleeve (13), and the inner sleeve (16) in sequence. The support rod (14) is connected to the outer sleeve (15) by the outer screw (23). The outer screw (23) is connected to the outer sleeve (15) and the support rod (14) in sequence. The support rod (14) is connected to the inner sleeve (16) by the inner screw (24). The inner screw (24) is connected to the inner sleeve (16) and the support rod (14) in sequence. The rotating sleeve (13) has a gear (12) on the outside. The rotating sleeve (13) passes through the positioning sleeve (17). The rotating sleeve (13) is connected to the positioning sleeve (17) by the thread.
2. The fixing fixture for an aerospace cylindrical shell according to claim 1, characterized in that: The positioning support (17) has a lever (18), the fixed platform (02) has multiple sliding holes (20), and the arc-shaped support plate (21) has a lever groove (19). The lever groove (19) and the sliding holes (20) are adapted to the lever (18). The lever (18) passes through the sliding holes (20) and is connected to the lever groove (19). The arc-shaped support plate (21) is externally connected to a rubber pad (22), and the lower part of the arc-shaped support plate (21) is attached to the fixed platform (02).
3. The fixing fixture for an aerospace cylindrical shell according to claim 2, characterized in that: The inner side of the protective cover (03) is attached to the movable cylinder (08), the outer side of the movable cylinder (08) has a rotating wheel (07), the inner side of the movable cylinder (08) has a toothed ring (11), the toothed ring (11) meshes with the gear (12), and the toothed ring (11) is connected to the gear (12).
4. The fixing fixture for an aerospace cylindrical shell according to claim 1, characterized in that: The lower part of the movable cylinder (08) is attached to the fixed seat (01). The movable cylinder (08) has a mounting sleeve (09). The mounting sleeve (09) is connected to the outside of the bearing (10). The bearing (10) is connected to the fixed seat (01). The fixed seat (01) is connected to the fixed column (04). The fixed column (04) has a square insert (05). The fixed seat (01) has a square slot (06). The square insert (05) is adapted to the square slot (06). The square insert (05) is connected to the square slot (06).