A hinged sub-frame device
By connecting the I-beam and the tee with a bolted structure, a bolted subframe is formed, which solves the problems of processing deformation of welded parts and residual stress in welds, and achieves high impact resistance and easy maintenance of the subframe.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU AEROSPACE TIANMA ELECTRICAL TECH
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-02
AI Technical Summary
Existing subframe devices are mostly welded parts, which are prone to large deformations during processing and are difficult to correct. Residual stress in the welds leads to poor structural stability, making them prone to cracks and affecting their performance.
It adopts a screw-in structure, using I-beams, tees and door frame components for connection, and forms a tight joint with bolts, screws and pins. All connection parts are detachable and replaceable, avoiding residual welding stress and improving impact resistance.
The screw-type subframe device exhibits minimal deformation during processing, good product consistency, strong impact resistance, and ease of maintenance and replacement, thereby enhancing structural stability and performance.
Smart Images

Figure CN224311828U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a screw-connected subframe device, belonging to the field of mechanical design and processing technology, and is applicable to large frame screw-connected structures. Background Technology
[0002] Due to product development needs, the requirements for subframe devices are becoming increasingly stringent. However, existing subframe devices mainly have the following shortcomings:
[0003] Subframe components are mostly welded parts, which are prone to large deformations during processing and are difficult to correct. Residual stress in the welds reduces the structural stability and load-bearing capacity. During transportation and use, the high structural rigidity of the product can easily lead to cracks in the welded joints and structural damage, which seriously affects the performance of the subframe components. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a screw-connected subframe device, which has the characteristics of small processing deformation and high product consistency. Utilizing the excellent ductility of the screw-connected structure, it can effectively improve the impact resistance of large frames and the reliability of the subframe device.
[0005] This utility model is achieved through the following technical solution.
[0006] This utility model provides a screw-connected subframe device, including multiple I-beams, tees, and door frame assemblies; the multiple I-beams, tees, and door frame assemblies are interconnected to form the overall frame of the subframe, and a rope locking device, diagonal support, connector, and equipment mounting plate are also connected to the I-beams by bolts; the I-beams are connected to bearing mounting seats through columns, and an adjusting shim for adjusting the height of the column is provided between the column and the I-beam.
[0007] Both ends of the I-beam are square grooves, and the three directions of the tee are bosses. The door frame assembly is connected to the I-beam by bolts.
[0008] The I-beam and the tee are connected by a boss and a square groove, and are fixed at the connection point with screws and pins.
[0009] The bearing mounting base is screwed to the column, and the column is screwed to the I-beam through a threaded hole and a cap nut.
[0010] The door frame assembly includes a door frame and an L-shaped connector, with the door frame bolted to the I-beam via the L-shaped connector.
[0011] The connector has a step and is fixed to the I-beam by bolts at the lap surface.
[0012] The equipment mounting plate is directly fixed to the preset mounting position of the I-beam by bolts.
[0013] The rope locking device includes an adapter turntable and an adapter body. The adapter body is connected to the I-beam, and the adapter turntable is mounted on the adapter body.
[0014] The door frame is provided with a groove, and a rubber sealing gasket is embedded in the groove.
[0015] All bolted connections of the subframe assembly are suitable for metal or non-metal frames, and each connection can be repeatedly disassembled and replaced.
[0016] The beneficial effects of this utility model are as follows: by adopting a screw connection structure and taking advantage of its excellent ductility, energy can be consumed during the impact process, thereby improving the impact resistance of the subframe device. At the same time, the screw connection structure is detachable and replaceable, which facilitates later maintenance and replacement, and can effectively improve the performance of the subframe device. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 yes Figure 1 Diagram of bolted connections for the I-beam and tee;
[0019] Figure 3 yes Figure 1 Diagram of the bolt connection between the bearing mounting base and the column;
[0020] Figure 4 yes Figure 1 Diagram of the bolted connection between the middle door frame assembly and the I-beam;
[0021] Figure 5 yes Figure 1 Diagram showing the bolted connections between the connecting parts, equipment mounting plate, and I-beam;
[0022] Figure 6 yes Figure 1 Structural diagram of the pull rope locking device;
[0023] In the diagram: 1-Pull rope locking device, 2-I-beam, 3-Column, 4-Diagonal support, 5-Tee, 6-Bearing mounting seat, 7-Connector, 8-Door frame assembly, 9-Equipment mounting plate, 10-Cap nut, 11-Door frame, 12-L-type connector, 13-Rubber sealing gasket, 14-Adapter turntable, 15-Adapter body. Detailed Implementation
[0024] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.
[0025] like Figure 1As shown, the I-beam (2) is connected to the tee (5). The two ends of the I-beam (2) are square grooves, and the three directions of the tee (5) are bosses. The I-beam (2) and the tee (5) are directly fixed together through the bosses and square grooves, and then screws and pins are used at the connection position to form a tight connection. The entire subframe frame is made up of I-beam (2) and tee (5) structures, including but not limited to metal frames. Non-metal frames are connected by bolted structures of tee and I-beam, such as... Figure 2 As shown.
[0026] Specifically, the bearing mounting base (6) is screwed to the column (3). The column (3) is screwed to the I-beam (2) through a threaded hole and a cap nut 10 at its lower end. By adding adjusting shims, the height of the column (3) can be adjusted, thereby adjusting the flatness of the working surface of the bearing mounting base (6). This includes, but is not limited to, metal frames and non-metal frames using a screwed connection structure between the bearing mounting base (6) and the column (3), such as... Figure 3 As shown.
[0027] Specifically, the door frame assembly (8) is fixed to the I-beam (2) by bolts. The door frame assembly (8) consists of an L-shaped connector 12, a door frame 11, and a rubber sealing gasket 13. One side of the L-shaped connector 12 is screwed to the I-beam (2), and the other side of the L-shaped connector 12 is screwed to the door frame 11. The door frame 11 is designed with grooves for assembling the rubber sealing gasket 13, such as... Figure 4 As shown.
[0028] Specifically, the rope locking device (1), connector (7), equipment mounting plate (9), and I-beam (2) are fixedly connected by bolts. The connector (7) has a step that overlaps with the I-beam, and the two contact surfaces are fixedly connected to the I-beam (2) by bolts. Figure 5 As shown.
[0029] Specifically, the pull rope locking device (1) consists of an adapter body 15 and an adapter disc 14. The adapter body 15 has a structure similar to a lug bolt. The adapter disc 14 is assembled between the subframe and the adapter body 15. The adapter disc 14 can be rotated at any angle before tightening the adapter body 15, which can adapt to the direction of the pull rope tension, such as... Figure 6 As shown.
[0030] In summary, this utility model uses bolted connections for all parts, allowing for repeated disassembly and replacement. The product is highly interchangeable, has minimal processing deformation, and is free from welding residual stress, thus exhibiting strong impact resistance.
Claims
1. A screw-connected subframe assembly, comprising multiple I-beams (2), tees (5), and door frame components (8), characterized in that: Multiple I-beams (2), tees (5) and door frame assemblies (8) are interconnected to form the overall frame of the subframe. A rope locking device (1), diagonal support (4), connector (7) and equipment mounting plate (9) are also connected to the I-beams (2) by bolts. The I-beams (2) are connected to bearing mounting seats (6) through columns (3), and there are adjusting shims between the columns (3) and the I-beams (2) for adjusting the height of the columns (3).
2. The screw-connected subframe device as described in claim 1, characterized in that: Both ends of the I-beam (2) are square grooves, and the three directions of the tee (5) are bosses. The door frame assembly (8) is connected to the I-beam (2) by bolts.
3. The screw-connected subframe device as described in claim 2, characterized in that: The I-beam (2) and the tee (5) are connected by a boss and a square groove, and are fixed at the connection position by screws and pins.
4. The screw-connected subframe device as described in claim 1, characterized in that: The bearing mounting base (6) is screwed to the column (3), and the column (3) is screwed to the I-beam (2) through the threaded hole and the cap nut (10).
5. The screw-connected subframe device as described in claim 1, characterized in that: The door frame assembly (8) includes a door frame (11) and an L-shaped connector (12), wherein the door frame (11) is screwed to the I-beam (2) via the L-shaped connector (12).
6. The screw-connected subframe device as described in claim 1, characterized in that: The connector (7) is provided with a step and is fixed to the lap surface of the I-beam (2) by bolts.
7. The screw-connected subframe device as described in claim 1, characterized in that: The equipment mounting plate (9) is directly fixed to the preset mounting position of the I-beam (2) by bolts.
8. The screw-connected subframe device as described in claim 1, characterized in that: The rope locking device (1) includes an adapter turntable (14) and an adapter body (15). The adapter body (15) is connected to the I-beam (2), and the adapter turntable (14) is mounted on the adapter body (15).
9. The screw-connected subframe device as described in claim 5, characterized in that: The door frame (11) is provided with a groove, and a rubber sealing gasket (13) is embedded in the groove.
10. The screw-connected subframe device as described in any one of claims 1 to 9, characterized in that: All bolted connections of the subframe assembly are suitable for metal or non-metal frames, and each connection can be repeatedly disassembled and replaced.