Lifting trailer

Abstract

The utility model discloses a lifting trailer and belongs to the technical field of trailer structures. The lifting trailer comprises a frame body; the first lifting unit is located at the front end of the advancing direction of the frame body and comprises a connecting beam and a first telescopic cylinder; the second lifting units are arranged on the two sides of the frame body, each second lifting unit comprises a damping spring, a connecting frame, a second telescopic cylinder, a connecting plate and wheels, the damping springs are hinged to the frame body and the connecting frames, cylinder barrels of the second telescopic cylinders are hinged to the connecting frames, and the connecting plates are hinged to the connecting frames. A piston rod of the second telescopic cylinder is hinged to the connecting plate, the wheels are connected with the connecting plate, and the connecting plate is hinged to the frame body. And the control box is connected with the first lifting unit and the second lifting unit. According to the scheme, the trailer structure facilitating loading of the articles is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of trailer structures, in particular to a lifting trailer. Background Art

[0002] In recent years, with the increasing demand for travel or the expansion of entertainment activities, more and more people choose to carry more items when traveling, such as taking mountain bikes, motorcycles or dune buggies with them to ride at the destination while traveling. However, these vehicles are large in size and difficult to put into the vehicle being driven for carrying. In order to facilitate carrying these vehicles, a trailer is usually attached to the rear of the driving vehicle, and these vehicles are placed on the trailer for carrying.

[0003] When placing the aforementioned vehicle on a trailer, it is usually necessary to use a loading and unloading ramp or lower the height of the trailer. In order to facilitate the transfer of the vehicle or other items to the trailer, this solution proposes a lifting trailer. Utility Model Content

[0004] The main purpose of the utility model is to provide a lifting trailer, aiming to provide a trailer structure that is convenient for transferring vehicles or other items onto the trailer.

[0005] To achieve the above-mentioned purpose, the lifting trailer proposed by the present invention includes:

[0006] frame;

[0007] a first lifting unit, the first lifting unit being located at the front end of the frame in the direction of travel, the first lifting unit comprising a connecting beam and a first telescopic cylinder, one end of the connecting beam being connected to the traction vehicle, and the other end being hinged to the frame to form a hinge point, a cylinder barrel of the first telescopic cylinder being hinged to the frame, a piston rod of the first telescopic cylinder being hinged to the connecting beam, and the hinge point being located within the travel of the first telescopic cylinder;

[0008] a second lifting unit, the second lifting unit being arranged on both sides of the frame, the second lifting unit comprising a damping spring, a connecting frame, a second telescopic cylinder, a connecting plate and wheels, the damping spring being hinged to the frame and the connecting frame, the cylinder barrel of the second telescopic cylinder being hinged to the connecting frame, the piston rod of the second telescopic cylinder being hinged to the connecting plate, the wheels being connected to the connecting plate, and the connecting plate being hinged to the frame;

[0009] A control box is connected to the first lifting unit and the second lifting unit.

[0010] Optionally, in an embodiment of the present invention, the first telescopic cylinder and the second telescopic cylinder are hydraulic cylinders.

[0011] Optionally, in an embodiment of the present invention, the frame is made of Q1500 steel.

[0012] Optionally, in an embodiment of the present invention, the connecting plate is a triangular connecting plate.

[0013] Optionally, in one embodiment of the present invention, it further includes a support leg, which is rotatably connected to the frame, and the support leg has a vertical state for supporting the frame and a horizontal state away from the ground.

[0014] Optionally, in an embodiment of the present invention, the support leg includes a cylinder, a support wheel, and a rocker arm, the support wheel is slidably connected to the cylinder via a sliding rod, and the rocker arm is connected to the support wheel.

[0015] Optionally, in an embodiment of the present invention, the second telescopic cylinder is located below the damping spring, two damping springs are provided, and the second telescopic cylinder is located between the two damping springs.

[0016] Optionally, in an embodiment of the present invention, the frame is formed by a cross-combination of multiple steels and is hollowed out.

[0017] Optionally, in one embodiment of the present invention, a safety shell is further included. The safety shell is provided with a pin hole, and the safety shell covers the first telescopic cylinder and the second telescopic cylinder.

[0018] Compared to the prior art, the present invention achieves at least the following beneficial effects. By utilizing dual lifting units, the present invention allows the frame to completely reach the ground during lowering, facilitating the transfer of items such as motorcycles and dune buggies onto the frame. Normally, both the first and second telescopic cylinders are extended, ensuring the frame is elevated above the ground and can be towed by a towing vehicle. When the frame needs to be lowered to the ground, the first and second telescopic cylinders are retracted via a control box. During the retraction of the first telescopic cylinder, the telescopic rod and cylinder barrel are articulated to the connecting beam and the frame, respectively. Therefore, the height of the connecting beam remains unchanged during the retraction of the first telescopic cylinder, while the height of the front section of the frame gradually decreases. During the retraction of the second telescopic cylinder, the connecting plate, connected to the wheel and the piston rod of the second telescopic cylinder, prevents the wheel from changing height during the frame's descent. Therefore, the connecting plate rotates toward the ground around the wheel. The frame is articulated to the cylinder barrel of the second telescopic cylinder via a damping spring and the connecting frame. During the descent, the cylinder barrel and damping spring of the second telescopic cylinder rotate synchronously, ultimately lowering the middle and rear sections of the frame. Because the first and second telescopic cylinders are controlled by the control box, the front and middle and rear sections of the frame descend synchronously until they reach the ground. At this point, the height difference between the frame and the ground is only equal to the frame's thickness, allowing vehicles such as motorcycles and dune buggies to easily transfer onto the frame. Once the vehicle is transferred, the control box extends the first and second telescopic cylinders, completing the raising of the frame and enabling it to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a side view of a lifting trailer of the utility model;

[0021] Figure 2 This is a side view of a lift trailer with its wheels hidden;

[0022] Figure 3 This is a top view of a middle frame of a lifting trailer of the utility model;

[0023] Figure 4 This is a structural schematic diagram of a lifting trailer of the utility model.

[0024] Description of Figure Numbers:

[0025] 100, frame; 200, first lifting unit; 210, connecting beam; 220, first telescopic cylinder; 300, second lifting unit; 310, damping spring; 320, connecting frame; 330, second telescopic cylinder; 340, connecting plate; 350, wheel; 400, control box; 500, support leg; 510, elastic latch; 520, cylinder; 530, support wheel; 540, rocker; 600, fuse housing;

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Reference Figures 1 to 4 The utility model provides a lifting trailer, comprising:

[0032] Frame 100;

[0033] The first lifting unit 200 is located at the front end of the frame 100 in the direction of travel. The first lifting unit 200 includes a connecting beam 210 and a first telescopic cylinder 220. One end of the connecting beam 210 is connected to the towing vehicle, and the other end is hinged to the frame 100 to form a hinge point. The cylinder barrel of the first telescopic cylinder 220 is hinged to the frame 100, and the piston rod of the first telescopic cylinder 220 is hinged to the connecting beam 210. The hinge point is located within the travel of the first telescopic cylinder 220.

[0034] The second lifting unit 300 is arranged on both sides of the frame 100. The second lifting unit 300 includes a damping spring 310, a connecting frame 320, a second telescopic cylinder 330, a connecting plate 340 and wheels 350. The damping spring 310 is hinged to the frame 100 and the connecting frame 320. The cylinder barrel of the second telescopic cylinder 330 is hinged to the connecting frame 320. The piston rod of the second telescopic cylinder 330 is hinged to the connecting plate 340. The wheels 350 are connected to the connecting plate 340. The connecting plate 340 is hinged to the frame 100.

[0035] The control box 400 is connected to the first lifting unit 200 and the second lifting unit 300 .

[0036] In this embodiment, by using a double lifting unit, the frame 100 can be completely dropped to the ground when it is lowered, which facilitates the transfer of vehicles such as motorcycles and dune buggies onto the frame 100. Under normal conditions, the first telescopic cylinder 220 and the second telescopic cylinder 330 are both in an extended state to ensure that the frame 100 is away from the ground and can be towed by a towing vehicle. When it is necessary to lower the frame 100 to the ground, the first telescopic cylinder 220 and the second telescopic cylinder 330 are retracted by controlling the control box 400. When the first telescopic cylinder 220 retracts, since the telescopic rod and the cylinder barrel are hinged to the connecting beam 210 and the frame 100 respectively, during the process of retracting the first telescopic cylinder 220, the height of the connecting beam 210 remains unchanged, and the height of the front section of the frame 100 gradually decreases. During the retraction of the second telescopic cylinder 330, the height of the wheel 350 does not change during the descent of the frame 100 because the connecting plate 340 is connected to the wheel 350 and the piston rod of the second telescopic cylinder 330. Therefore, the connecting plate 340 rotates toward the ground around the wheel 350. The frame 100 is hinged to the cylinder barrel of the second telescopic cylinder 330 via the damping spring 310 and the connecting frame 320. During the descent, the cylinder barrel of the second telescopic cylinder 330 and the damping spring 310 rotate synchronously, ultimately lowering the middle and rear sections of the frame 100. Because the first telescopic cylinder 220 and the second telescopic cylinder 330 are controlled by the control box 400, the front and middle and rear sections of the frame 100 descend synchronously until they reach the ground. At this point, the height difference between the frame 100 and the ground is only equal to the thickness of the frame 100, allowing vehicles such as motorcycles and dune buggies to easily transfer onto the frame 100. When the transfer of the relevant vehicles is completed, the first telescopic cylinder 220 and the second telescopic cylinder 330 are extended through the control box 400 to complete the lifting of the frame 100, so as to drive the frame 100 to move.

[0037] Specifically, the first telescopic cylinder 220 and the second telescopic cylinder 330 are hydraulic cylinders. Because the frame 100 is in a raised position for extended periods and carries heavy objects, the frame 100 exerts a significant force on the telescopic cylinders. To ensure the stability of the frame 100, hydraulic cylinders were selected. Unlike other types of telescopic cylinders, hydraulic cylinders offer greater stability. Furthermore, in addition to carrying items such as dune buggies and motorcycles, the frame 100 can also serve as the base for a trailer-type RV. When used as the base for a RV, the frame 100 places even higher demands on the stability of the telescopic cylinders.

[0038] Furthermore, since the telescopic cylinders are normally extended, a safety cover 600 is provided on the telescopic cylinders (including the first telescopic cylinder 220 and the second telescopic cylinder 330) to prevent the piston rods from retracting suddenly due to failure or misoperation. Specifically, one end of the safety cover 600 is hinged to the cylinder barrel of the telescopic cylinder, and the other end of the safety cover 600 is provided with a pin hole. After the telescopic cylinders are extended, the safety cover 600 is rotated to cover the cylinder barrel and piston rod, and a safety pin is inserted into the pin hole to prevent the piston rod from retracting. To lower the frame 100, the safety pin is released and the safety cover 600 is rotated away from the cylinder barrel to prevent it from interfering with the retraction of the piston rod.

[0039] Furthermore, the frame 100 is formed from multiple intersecting steel bars with hollow sections. Specifically, the steel is preferably Q1500 steel. According to trailer standards, the sum of the mass of the frame 100 and the load capacity must be below a certain value. Therefore, reducing the mass of the frame 100 allows for the loading of heavier items. To this end, the frame 100 is designed with a hollow, intersecting structure to reduce its mass.

[0040] In addition, the strength of the frame 100 needs to match its load-bearing capacity, and Q1500 steel is selected as the steel used for the frame 100. Q1500 steel has the characteristics of high strength, good toughness, good fatigue resistance, corrosion resistance, and lightweight. Therefore, using Q1500 steel as the manufacturing material of the frame 100 can simultaneously meet the requirements of high structural strength and lightweight of the frame 100. In addition, because the trailer is in a high-load state outdoors for a long time, the high toughness, fatigue resistance, and corrosion resistance can also extend the service life of the trailer.

[0041] After the lifting trailer arrives at the destination, the frame 100 can be detached from the towing vehicle. In order to support the detached frame 100, a leg 500 is provided. The leg 500 is provided at the front end of the frame 100. The leg 500 is rotatably connected to the frame 100 and fixed by an elastic latch 510. When lowering the leg 500, the elastic latch 510 is pulled out and the cylinder 520 is rotated. When the leg 500 is perpendicular to the ground as a whole, the elastic latch 510 is inserted into the frame 100 again to keep the leg 500 in a vertical position. The rocker 540 is rotated to adjust the length of the support wheel 530 so that the support wheel 530 contacts the ground, thereby completing the support of the frame 100. In addition, the support wheel 530 has a separate locking structure to prevent the support wheel 530 from sliding at will. When the support leg 500 is used, the elastic latch 510 is pulled out, the cylinder 520 is turned horizontally, and the elastic latch 510 is reinserted to complete the storage of the support leg 500.

[0042] In one embodiment, the frame 100 includes a rectangular portion and an angular portion, the connecting beam 210 is disposed on the isosceles triangle portion, and the supporting legs 500 are disposed on at least one waist of the isosceles triangle portion.

[0043] Furthermore, the connecting plate 340 is in a triangular shape. The connecting plate 340 serves to connect the wheel 350 and the piston rod of the second telescopic cylinder 330 in the second lifting unit 300. To improve its carrying capacity, the connecting plate 340 is designed in a triangular shape to improve its stability.

[0044] The second lifting unit 300 is equipped with two damping springs 310. These serve as connectors between the frame 100 and the wheels 350, primarily to dampen vibrations. When the frame 100 is towed by a towing vehicle and encounters bumps, vibrations can occur. If the frame 100 is carrying an object, excessive vibrations can cause collisions between the object and the frame 100, potentially damaging the object or the frame 100. To mitigate these shocks, two damping springs 310 are provided.

[0045] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, within the inventive concept of the present invention, are included in the patent protection scope of the present invention.

Claims

1. A lifting trailer, characterized in that: include: frame; a first lifting unit, the first lifting unit being located at the front end of the frame in the direction of travel, the first lifting unit comprising a connecting beam and a first telescopic cylinder, one end of the connecting beam being connected to the traction vehicle, and the other end being hinged to the frame to form a hinge point, a cylinder barrel of the first telescopic cylinder being hinged to the frame, a piston rod of the first telescopic cylinder being hinged to the connecting beam, and the hinge point being located within the travel of the first telescopic cylinder; a second lifting unit, the second lifting unit being arranged on both sides of the frame, the second lifting unit comprising a damping spring, a connecting frame, a second telescopic cylinder, a connecting plate and wheels, the damping spring being hinged to the frame and the connecting frame, the cylinder barrel of the second telescopic cylinder being hinged to the connecting frame, the piston rod of the second telescopic cylinder being hinged to the connecting plate, the wheels being connected to the connecting plate, and the connecting plate being hinged to the frame; A control box is connected to the first lifting unit and the second lifting unit.

2. The lift trailer according to claim 1, wherein: The first telescopic cylinder and the second telescopic cylinder are hydraulic cylinders.

3. The lift trailer according to claim 1, wherein: The frame is made of Q1500 steel.

4. The lift trailer according to claim 1, wherein: The connecting plate is a triangular connecting plate.

5. The lift trailer according to claim 1, wherein: It also includes a support leg, which is rotatably connected to the frame body, and the support leg has a vertical state of supporting the frame body and a horizontal state away from the ground.

6. The lift trailer according to claim 5, wherein: The support leg includes a cylinder, a support wheel, and a rocker. The support wheel is slidably connected to the cylinder through a sliding rod, and the rocker is connected to the support wheel.

7. The lift trailer according to claim 1, wherein: The second telescopic cylinder is located below the damping spring. Two damping springs are provided, and the second telescopic cylinder is located between the two damping springs.

8. The lift trailer according to claim 1, wherein: The frame is formed by cross-combining a plurality of steel materials and is hollowed out.

9. The lift trailer according to claim 1, wherein: The utility model further comprises a safety shell, wherein the safety shell is provided with a pin hole, and the safety shell covers the first telescopic cylinder and the second telescopic cylinder.

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