Movable boarding ramp

Abstract

The movable boarding ramp comprises a steel framework, a deck plate is fixedly connected to the upper surface of the steel framework, first trundles are symmetrically arranged on one side of the inner wall of the steel framework, second trundles are symmetrically arranged on the side, away from the first trundles, of the inner wall of the steel framework, and the first trundles are arranged in a four-corner symmetrical mode. The boarding ramp is of an integral structure and is convenient to move or transfer, the trundles are lifted through the turbine lead screw lifters, when the boarding ramp is used, the steel framework is attached to the ground through lifting, when temporary transfer is needed, the turbine lead screw lifters are driven by the rotators to ascend and descend, the trundles on the two sides are exposed, and the steel framework is attached to the ground through lifting. Lifting is achieved through linkage of the connecting rods of the universal couplings, in this way, synchronous adjustment can be achieved, the adjusting time is greatly shortened, due to the fact that the linkage mechanism is adopted, operation can be conducted on one side, splicing of two sets of getting-on ramps can be achieved, and the using requirement for a larger size can be met.

Description

Technical Field

[0001] This utility model relates to the field of turntable auxiliary technology, specifically to a movable vehicle ramp. Background Technology

[0002] For some car turntables or rotating stages, where a foundation pit is not constructed, the turntable needs to be installed on the ground. This means the turntable surface will be raised above the ground. For situations requiring loading and unloading of vehicles or transporting goods by handcart, a loading ramp is necessary for ease of access. Generally, loading ramps are fixed and, due to their large size and weight, require forklifts or other transport vehicles for movement. In situations where there are no transport vehicles and frequent needs to move the loading ramp, such as rotating stages used for filming, this can cause significant inconvenience for users. Therefore, we propose a movable loading ramp. Utility Model Content

[0003] The purpose of this invention is to provide a movable ramp for loading vehicles to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a movable ramp for loading vehicles, comprising a steel frame, a platform fixedly connected to the upper surface of the steel frame, a first caster symmetrically arranged on one side of the inner wall of the steel frame, a second caster symmetrically arranged on the side of the inner wall of the steel frame away from the first caster, and the first casters being arranged symmetrically at the four corners.

[0005] Preferably, a steering mechanism is symmetrically arranged between the two first casters and the second caster on the same side. The lower surface of the steering mechanism is fixedly connected to the inner wall of the steel frame. A second connecting rod is rotatably connected to one side of the steering mechanism, and a first worm gear screw jack is rotatably connected to the other side of the second connecting rod. The lower surface of the first worm gear screw jack is fixedly connected to the upper surface of the first caster. A third connecting rod is rotatably connected to the other side of the steering mechanism, and a second worm gear screw jack is rotatably connected to the other side of the third connecting rod. The lower surface of the second worm gear screw jack is fixedly connected to the upper surface of the second caster.

[0006] Preferably, a first connecting rod is rotatably connected between the inner sides of the two steering gears, and a handwheel is installed on the side wall of one of the steering gears.

[0007] Preferably, universal joints are provided at both ends of the first connecting rod, the second connecting rod, and the third connecting rod.

[0008] Preferably, the diameters of the first caster and the second caster are different, and the diameter of the first caster is larger than the diameter of the second caster.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: the ramp adopts an integral structure, eliminating the time required for on-site assembly. Furthermore, the ramp uses a four-set caster structure, facilitating movement or relocation. The casters are raised and lowered via a worm gear screw jack. When used as a ramp, the steel frame is brought into contact with the ground through raising and lowering. When temporary relocation is required, the worm gear screw jack is raised and lowered by a rotator, exposing the casters on both sides. The raising and lowering are achieved through linkage using a universal joint connecting rod. This not only enables synchronous adjustment but also significantly reduces adjustment time. Because of the linkage mechanism, operation can be performed from one side, allowing for the splicing of two ramps to meet the needs of larger sizes. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 for Figure 1 Detailed structural diagrams of the first and second casters;

[0012] Figure 3 for Figure 1 Enlarged detail image of the first caster wheel;

[0013] Figure 4 for Figure 1 Enlarged detail image of the steering gear;

[0014] Figure 5 for Figure 1 Enlarged detail image of the second caster in the middle;

[0015] In the diagram: 1. Steel frame; 2. Tabletop; 3. First caster; 4. Second caster; 5. Steering mechanism; 6. First connecting rod; 7. Second connecting rod; 8. First worm gear screw jack; 9. Third connecting rod; 10. Second worm gear screw jack; 11. Handwheel. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5This utility model provides a movable ramp for loading vehicles, including a steel frame 1, a platform 2 fixedly connected to the upper surface of the steel frame 1, a first caster 3 symmetrically arranged on one side of the inner wall of the steel frame 1, and a second caster 4 symmetrically arranged on the side of the inner wall of the steel frame 1 away from the first caster 3, and the first caster 3 is arranged symmetrically at the four corners.

[0018] A steering mechanism 5 is symmetrically arranged between the two first casters 3 and the second caster 4 on the same side. The lower surface of the steering mechanism 5 is fixedly connected to the inner wall of the steel frame 1. A second connecting rod 7 is rotatably connected to one side of the steering mechanism 5. A first worm gear screw jack 8 is rotatably connected to the other side of the second connecting rod 7. The lower surface of the first worm gear screw jack 8 is fixedly connected to the upper surface of the first caster 3. A third connecting rod 9 is rotatably connected to the other side of the steering mechanism 5. A second worm gear screw jack 10 is rotatably connected to the other side of the third connecting rod 9. The lower surface of the second worm gear screw jack 10 is fixedly connected to the upper surface of the second caster 4.

[0019] A first connecting rod 6 is rotatably connected between the inner sides of the two steering gears 5, and a handwheel 11 is installed on the side wall of one steering gear 5.

[0020] Universal couplings are provided at both ends of the first connecting rod 6, the second connecting rod 7, and the third connecting rod 9.

[0021] The diameters of the first caster 3 and the second caster 4 are different, and the diameter of the first caster 3 is larger than the diameter of the second caster 4.

[0022] Working Principle: The ramp consists of a steel frame 1 and a platform 2. The steel frame 1 is the important load-bearing structure, welded from rectangular tubing. The dimensions of the ramp depend on specific requirements such as overall height, width, and slope. The steel frame 1 has an upper and lower plane. The lower plane rests directly on the ground, supporting the overall structure, while the upper plane has a certain slope, directly bearing the load. The platform 2 is located on the upper plane of the steel frame 1 and is fixed to the frame 1 as a whole using screws. During linkage lifting, it is accomplished through casters on both sides and steering mechanisms 5. The first caster 3 and the second caster 4, along with the steering mechanism 5, are fixed inside the steel frame 1. The first caster 3 and the second caster 4 differ only in their diameter; other structures are identical. Because the ramp has a certain angle, and the caster size cannot be made large near the sharp corner due to space limitations, two sizes of casters are used: one large and one small. The wheel assembly is designed to make pushing easier. The surface of the first caster 3 is equipped with a first worm gear screw jack 8, and the first caster 3 is connected to the steering gear 5 through a second connecting rod 7. The surface of the second caster 4 is equipped with a second worm gear screw jack 10, and the second caster 4 is connected to the steering gear 5 through a third connecting rod 9. Both caster structures on both sides use worm gear screw jacks as lifting components. When performing linkage lifting, turn the handwheel 11 on one side. The handwheel 11 is connected to the steering gear 5. The steering gears 5 are connected to each other through a first connecting rod 6. Universal couplings are provided at both ends of the three connecting rods. In this way, by manually turning the handwheel, the worm gear screw jacks of the four casters can be raised synchronously. When used as a fixed ramp for loading onto vehicles, the casters are raised so that the steel frame 1 contacts the ground. When it is necessary to move, turn the handwheel 11 to lower the casters, and the ramp can be moved or transferred.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A movable loading ramp, characterized in that: The steel frame (1) includes a tabletop (2) fixedly connected to the upper surface of the steel frame (1). A first caster (3) is symmetrically arranged on one side of the inner wall of the steel frame (1), and a second caster (4) is symmetrically arranged on the side of the inner wall of the steel frame (1) away from the first caster (3). The first caster (3) is arranged symmetrically at the four corners.

2. The movable loading ramp according to claim 1, characterized in that: A steering mechanism (5) is symmetrically arranged between the two first casters (3) and the second caster (4) on the same side. The lower surface of the steering mechanism (5) is fixedly connected to the inner wall of the steel frame (1). A second connecting rod (7) is rotatably connected to one side of the steering mechanism (5). A first turbine screw jack (8) is rotatably connected to the other side of the second connecting rod (7). The lower surface of the first turbine screw jack (8) is fixedly connected to the upper surface of the first caster (3). A third connecting rod (9) is rotatably connected to the other side of the steering mechanism (5). A second turbine screw jack (10) is rotatably connected to the other side of the third connecting rod (9). The lower surface of the second turbine screw jack (10) is fixedly connected to the upper surface of the second caster (4).

3. A movable loading ramp according to claim 2, characterized in that: A first connecting rod (6) is rotatably connected between the inner sides of the two steering gears (5), and a handwheel (11) is installed on the side wall of one side of the steering gear (5). Universal couplings are provided at both ends of the first connecting rod (6), the second connecting rod (7), and the third connecting rod (9).

4. A movable ramp for loading vehicles according to claim 1, characterized in that: The diameters of the first caster (3) and the second caster (4) are different, and the diameter of the first caster (3) is larger than the diameter of the second caster (4).

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