A lift for a house car which is convenient to fold and store
By designing a combination of screw, internal threaded column, connecting plate and insert, and using a drive motor and spring, the problem of complex operation and large size after storage of traditional RV lifts is solved. It achieves quick folding and fixing, simplifies the operation process, and reduces space occupation and driving impact.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN TIANYE MODEL MFG CO LTD
- Filing Date
- 2025-09-29
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional RV lifts require manual assembly and disassembly of the ladder frame components, which is complicated to operate, bulky when stored, takes up space, and affects driving.
A foldable and easy-to-store RV lift has been designed. By combining a screw, an internally threaded column, a connecting plate, a platform, and a plug, and utilizing the cooperation of a drive motor and springs, the platform can be quickly folded and fixed, simplifying the operation process.
It enables quick storage and fixation of the platform, reduces space occupation, avoids travel restrictions, and is simple, safe and reliable to operate.
Smart Images

Figure CN224545826U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of RV lift technology, specifically an RV lift that is easy to fold and store. Background Technology
[0002] A motorhome lift is a lifting device specifically designed for motorhomes. It is mainly used to facilitate passengers getting on and off the vehicle or loading and unloading items. It is usually installed at the rear or side of the motorhome and achieves smooth lifting through electric or hydraulic drive. It is suitable for people with mobility impairments or for moving large luggage.
[0003] Traditional elevators often require multiple steps, such as manually assembling the ladder frame and fixing the support components. When storing them, the ladder frame components need to be disassembled one by one, making the operation process complicated. Moreover, the overall volume is still large after storage, which will significantly occupy the activity space of the RV or increase the width of the vehicle, affecting driving. Utility Model Content
[0004] To overcome the above-mentioned defects, this utility model provides a motorhome lift that is easy to fold and store. It solves the problem that traditional lifts mostly require multiple steps such as manually assembling the ladder frame and fixing the support components. When storing, the ladder frame components need to be disassembled one by one, which is complicated. Moreover, the overall volume is still large after storage, which will significantly occupy the motorhome's activity space or increase the vehicle's width and affect driving.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a foldable and easy-to-store RV lift, including a fixed base, fixed holes on both sides of the fixed base, a hollow column connected to the fixed base, a drive motor fixedly installed below the hollow column, a screw connected to the output shaft of the drive motor, an internally threaded column threaded on the screw, and a connecting plate connected to one end of the internally threaded column;
[0006] A fixing block is connected to the connecting plate, and a fixing rod is connected to one end of the connecting plate. A ladder is rotatably installed on the connecting plate via the fixing rod. A hollow rod is connected inside the fixing block, and a pull rod is slidably connected through the hollow rod. A spring is sleeved on the pull rod, and an insert block is connected to one end of the pull rod.
[0007] As a further embodiment of this utility model: a connecting sleeve is connected to the ladder platform, the connecting sleeve is rotatably connected to the fixed rod, the screw is rotatably connected to slide inside the hollow column through the bearing, and limit grooves are provided on one side of the hollow column and the wall of the fixed seat.
[0008] As a further embodiment of this utility model: the internally threaded column slides inside the hollow column, and a limiting plate is connected to one side of the internally threaded column, and the limiting plate slides inside the limiting groove.
[0009] As a further embodiment of this utility model: the connecting plate is designed in an L-shape, and the L-shaped end of the connecting plate contacts and abuts against the ladder platform; the insert is designed in a U-shape and has an inclined surface on one side; one side of the ladder platform is inserted into the U-shaped groove of the insert.
[0010] As a further embodiment of this utility model: one end of the spring is connected to the inner wall of the hollow rod, and the other end of the spring is connected to a fixing ring, which is fixedly connected to the pull rod and slides inside the hollow rod.
[0011] As a further embodiment of this utility model: one end of the pull rod is provided with a threaded section, and a nut is threadedly connected to the threaded section, and the nut is provided with anti-slip texture.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] 1. This foldable and easy-to-store RV lift consists of a screw, an internally threaded column, a connecting plate, a platform, and an insert. In use, pushing the platform causes the connecting sleeve to rotate on the fixed rod, bringing the bottom of the platform abutting against the L-shaped end of the connecting plate. During operation, the drive motor rotates the screw, causing the internally threaded column to slide within the hollow column and move the connecting plate, thus lifting the platform to transport luggage. For storage, simply rotate the platform, causing it to push the insert upwards via the inclined surface on one side. When the insert falls, the platform inserts into the U-shaped slot of the insert, securing it. The operation is simple and quick, enabling rapid folding and storage, reducing space occupation and avoiding travel restrictions.
[0014] 2. This foldable and easy-to-store RV lift features a pull rod, spring, retaining ring, threaded section, and nut. When the ladder platform is pushed upward by the inclined surface of the insert block, the pull rod and retaining ring slide inside the hollow rod, compressing the spring. The spring's rebound assists the insert block in falling, securing the ladder platform and preventing accidental rotation and unfolding. Afterward, by tightening the nut, it moves along the threaded section and abuts against one end of the hollow rod, preventing the pull rod from accidentally sliding upward and causing the fixation to loosen. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention;
[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the hollow column of this utility model;
[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the internally threaded column of this utility model;
[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the hollow rod of this utility model;
[0019] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of section A in the middle;
[0020] In the diagram: 1. Fixed base; 2. Fixed hole; 3. Hollow column; 4. Drive motor; 5. Screw; 6. Internally threaded column; 7. Connecting plate; 8. Fixed block; 9. Fixed rod; 10. Ladder platform; 11. Hollow rod; 12. Tie rod; 13. Spring; 14. Insert block; 15. Connecting sleeve; 16. Limiting plate; 17. Limiting groove; 18. Fixed ring; 19. Threaded section; 20. Nut. Detailed Implementation
[0021] The technical solution of this patent will be further described in detail below with reference to specific embodiments.
[0022] like Figure 1-5 As shown, this utility model provides a technical solution: a foldable and easy-to-store RV lift, including a fixed base 1, fixed holes 2 on both sides of the fixed base 1, a hollow column 3 connected to the fixed base 1, a drive motor 4 fixedly installed below the hollow column 3, a screw 5 connected to the output shaft of the drive motor 4, an internally threaded column 6 threadedly installed on the screw 5, the internally threaded column 6 sliding inside the hollow column 3, a limiting plate 16 connected to one side of the internally threaded column 6, the limiting plate 16 sliding inside the limiting groove 17, when the internally threaded column 6 moves, the limiting plate 16 will slide inside the limiting groove 17 and eventually abut against the groove wall of the limiting groove 17, thereby preventing the internally threaded column 6 from detaching from the hollow column 3.
[0023] One end of the internally threaded column 6 is connected to a connecting plate 7. The connecting plate 7 is L-shaped, and the L-shaped end of the connecting plate 7 contacts and abuts against the ladder platform 10. The insert block 14 is U-shaped and has a bevel on one side. One side of the ladder platform 10 is inserted into the U-shaped groove of the insert block 14. Through the abutment between the L-shaped end of the connecting plate 7 and the ladder platform 10, the ladder platform 10 can be supported by the fixing rod 9. The bevel on one side of the insert block 14 makes it easy for the ladder platform 10 to push the insert block 14 upward, thereby making it easier for the staff to fix the ladder platform 10 and simplifying the operation.
[0024] A fixing block 8 is connected to the connecting plate 7, and a fixing rod 9 is connected to one end of the connecting plate 7. A ladder 10 is rotatably installed on the connecting plate 7 via the fixing rod 9. A connecting sleeve 15 is connected to the ladder 10. The connecting sleeve 15 is rotatably connected to the fixing rod 9. The screw 5 is rotatably connected to the hollow column 3 via a bearing and slides inside the hollow column 3. Limiting grooves 17 are opened on one side of the hollow column 3 and on the wall of the fixing seat 1. Through the rotational cooperation of the connecting sleeve 15 and the fixing rod 9, the ladder 10 can be flexibly flipped to complete the conversion between horizontal and vertical states, thereby facilitating the use and storage of staff.
[0025] A hollow rod 11 is connected inside the fixed block 8. A pull rod 12 is slidably connected through the hollow rod 11. One end of the pull rod 12 is provided with a threaded section 19. A nut 20 is threadedly connected to the threaded section 19, and the nut 20 is provided with anti-slip texture. By turning the nut 20, the nut 20 abuts against one end of the hollow rod 11, thereby limiting the pull rod 12 and preventing vibration from causing the insert block 14 to move.
[0026] A spring 13 is sleeved on the pull rod 12. One end of the pull rod 12 is connected to a plug 14. One end of the spring 13 is connected to the inner wall of the hollow rod 11. The other end of the spring 13 is connected to a fixing ring 18. The fixing ring 18 is fixedly connected to the pull rod 12 and slides inside the hollow rod 11. The pull rod 12 is reset by pushing the fixing ring 18 through the rebound of the spring 13, which in turn drives the plug 14 to lock the platform 10. The platform 10 can be limited and fixed without manually adjusting the position of the plug 14.
[0027] The working principle of this utility model is as follows:
[0028] In use, loosening nut 20 pulls lever 12 upwards, causing insert 14 to disengage from platform 10. Then, platform 10 is pushed until its lower part abuts against the L-shaped end of connecting plate 7. During operation, drive motor 4 rotates screw 5, causing internal threaded post 6 to slide within hollow post 3 and drive connecting plate 7, thus raising platform 10 and completing the lifting and transport of luggage. For storage, simply push and rotate platform 10 upwards; during this process, platform 10 will pass over the inclined surface on one side of insert 14. Pushing the insert 14 upward causes the fixing ring 18 and the pull rod 12 to slide within the hollow rod 11 and compress the spring 13. The rebound of the spring 13 then assists the insert 14 to fall, allowing the platform 10 to be inserted into the U-shaped slot of the insert 14, thereby fixing the platform 10 to reduce space occupation and avoid restricting movement. Then, the nut 20 is tightened, causing the nut 20 to move along the threaded section 19 and abut against one end of the hollow rod 11, thereby preventing the pull rod 12 from accidentally sliding upward and causing the fixation to loosen.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.
Claims
1. A foldable and easily stored RV lift, comprising a fixed base (1), characterized in that: The fixed base (1) has fixed holes (2) on both sides. A hollow column (3) is connected to the fixed base (1). A drive motor (4) is fixedly installed below the hollow column (3). The output shaft of the drive motor (4) is connected to a screw (5). An internal threaded column (6) is threadedly installed on the screw (5). A connecting plate (7) is connected to one end of the internal threaded column (6). A fixing block (8) is connected to the connecting plate (7), and a fixing rod (9) is connected to one end of the connecting plate (7). A ladder (10) is rotatably installed on the connecting plate (7) through the fixing rod (9). A hollow rod (11) is connected inside the fixing block (8). A pull rod (12) is slidably connected through the hollow rod (11). A spring (13) is sleeved on the pull rod (12). A plug (14) is connected to one end of the pull rod (12).
2. The foldable and easily stored RV lift according to claim 1, characterized in that: A connecting sleeve (15) is connected to the platform (10). The connecting sleeve (15) is rotatably connected to the fixing rod (9). The screw (5) is rotatably connected to the hollow column (3) and slides inside the hollow column (3) through the bearing. Limiting grooves (17) are opened on one side of the hollow column (3) and the wall of the fixing seat (1).
3. The foldable and easily stored RV lift according to claim 2, characterized in that: The internally threaded column (6) slides within the hollow column (3), and a limiting plate (16) is connected to one side of the internally threaded column (6). The limiting plate (16) slides within the limiting groove (17).
4. The foldable and easily stored RV lift according to claim 1, characterized in that: The connecting plate (7) is L-shaped, and the L-shaped end of the connecting plate (7) contacts and abuts against the ladder (10). The insert (14) is U-shaped and has a sloping surface on one side. The ladder (10) is inserted into the U-shaped groove of the insert (14) on one side.
5. A foldable and easily stored RV lift according to claim 1, characterized in that: One end of the spring (13) is connected to the inner wall of the hollow rod (11), and the other end of the spring (13) is connected to a fixing ring (18). The fixing ring (18) is fixedly connected to the pull rod (12) and slides inside the hollow rod (11).
6. The foldable and easily stored RV lift according to claim 1, characterized in that: One end of the pull rod (12) is provided with a threaded section (19), and a nut (20) is threadedly connected to the threaded section (19), and the nut (20) is provided with anti-slip texture.