一种方便重物上楼的拖车架
By designing the trailer wheel and support structure, the problem of moving heavy objects up stairs is solved, enabling effortless carrying of heavy objects upstairs and convenient storage of the trailer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN LIANXING LUGGAGE ACCESSORIES CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-07-17
AI Technical Summary
Staircase steps are inconvenient for carrying heavy objects upstairs, and traditional trailer rack designs cannot effectively assist in carrying heavy objects upstairs.
A trailer frame was designed, comprising trailer wheels and trailer wheel brackets. Using elastic and limiting devices, the trailer wheel brackets can roll on stair steps to assist in carrying heavy objects upstairs. The trailer frame can be stored and its length adjusted through a rope and tie rod structure.
It enables the convenient and labor-saving lifting of heavy objects on stairs, and the trailer rack is retractable, making it easy to store and adapt to different working conditions.
Smart Images
Figure CN224511136U_ABST
Abstract
Claims
1. A trailer frame for facilitating the carrying of heavy objects up stairs, comprising a trailer frame body (10) and trailer wheels (20) mounted on trailer wheel supports (21), characterised in that: The trailer wheel bracket is hinged to the trailer frame body. An elastic device is provided between the trailer wheel bracket and the trailer frame body, which makes the trailer wheel bracket tend to move away from the trailer frame body. A limiting device is provided between the trailer wheel bracket and the trailer frame body, which limits the maximum distance of the trailer wheel bracket away from the trailer frame body.
2. The dolly of claim 1, wherein: The trailer frame body (10) is fixedly provided with a rotating support (11), and the end of the rotating shaft (22) of the trailer wheel bracket (21) is movably fitted in the rotating support. The elastic device is a torsion spring (23) provided between the rotating support and the rotating shaft.
3. The dolly of claim 2, wherein: The limiting device includes a limiting block (12) disposed on the inner wall of the rotating support (11) and a limiting groove (221) disposed at the end of the rotating shaft (22), with the limiting block fitting in the limiting groove.
4. The dolly of claim 1, wherein: The limiting device includes a rope (30) connecting the trailer wheel bracket (21) and the trailer frame body (10).
5. The dolly of claim 4, wherein: The trailer frame body (10) is provided with a guide (13) and a rope fixing member (14). One end of the rope (30) is connected to the trailer wheel bracket (21), and the other end of the rope is connected to the rope fixing member after passing through the guide.
6. The dolly of claim 5, wherein: The trailer frame body (10) is provided with a trailer wheel bracket storage seat (15), and the trailer wheel bracket (21) that is closed with the trailer frame body is fitted in the trailer wheel bracket storage seat.
7. The dolly of claim 1, wherein: The trailer frame body (10) includes a frame (16) and a tie rod (17). The tie rod has a first pin hole, and the frame has several second pin holes (171). The tie rod is inserted into the frame, and a spring piece (18) is fitted in the tie rod. The spring piece has a pin (181), which is inserted into the aligned first pin hole and second pin hole.
8. The dolly of claim 7, wherein: The end of the tie rod insertion hole of the frame (16) is provided with a plastic kit (19), the plastic kit is provided with a buckle (191), the frame is provided with a slot (161), the plastic kit fits into the tie rod insertion hole of the frame, and the buckle and the slot fit together.