Hydraulic lifting platform trailer

Abstract

The utility model discloses a hydraulic lifting platform trailer, which belongs to the technical field of trailers and comprises a chassis frame and a carriage slidably mounted on the chassis frame, independent suspensions are respectively arranged on two sides of the chassis frame, the independent suspensions are hinged to the chassis frame, buffer devices are arranged between the independent suspensions and the chassis frame, and hubs are rotatably mounted on the independent suspensions; an oil cylinder is hinged between the chassis frame and the front end of the carriage, a guide structure is arranged between the side face of the carriage and the chassis frame in a matched mode, and when the carriage ascends and descends, the carriage keeps horizontal through the guide structure and can fall to the ground. A locking mechanism is arranged between the front end of the carriage and the chassis frame, after the carriage ascends to a set position, the carriage and the chassis frame are locked through the locking mechanism, when the carriage descends, the carriage can stably fall on the ground, vehicles such as an excavator do not need to be loaded and unloaded with the help of external equipment, use is convenient, when the carriage ascends to the set position, the carriage can be reliably locked, and use is convenient. And the use safety is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of trailers, and in particular relates to a hydraulic lifting flatbed trailer. Background Art

[0002] A trailer is a tool used to transport vehicles such as excavators. It is generally composed of a traction frame and a carriage. The traction frame is connected to the front vehicle and is used to tow the trailer, while the carriage is used to carry the vehicle. Generally, the trailer carriage is fixed. When transporting equipment such as excavators or cars, a loading and unloading platform or crane is required to move the excavator onto the trailer or move it off the trailer, which causes great inconvenience to the majority of vehicle users. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hydraulic lifting flatbed trailer, which can fall to the ground stably when the carriage is lowered, does not need to use external equipment to load and unload vehicles such as excavators, is easy to use, and can reliably lock the carriage when it rises to a set position, and has high safety in use.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A hydraulically-liftable flatbed trailer comprises a chassis frame and a carriage slidably mounted on the chassis frame, independent suspensions are respectively arranged on both sides of the chassis frame, the independent suspensions are hinged to the chassis frame and a buffer device is arranged between the two, and a wheel hub is rotatably mounted on the independent suspension; an oil cylinder is hinged between the chassis frame and the front end of the carriage, a guide structure is cooperatively arranged between the side of the carriage and the chassis frame, the guide structure enables the carriage to remain horizontal when the carriage is lifted or lowered and the carriage can fall to the ground when it is lowered; a locking mechanism is arranged between the front end of the carriage and the chassis frame, and after the carriage rises to a set position, the locking mechanism locks the carriage and the chassis frame.

[0006] Furthermore, the guide structure includes a guide rail and a roller, the roller is rotatably installed in the guide rail, two guide rails are respectively provided on the left and right sides of the carriage, and the roller is rotatably installed at a corresponding position of the chassis frame.

[0007] Furthermore, the guide rail is a straight structure and the upper end is inclined toward the front end of the carriage.

[0008] Furthermore, the locking mechanism includes a hook installed on the carriage and a hanging shaft installed on the chassis frame. When the hook is hung on the hanging shaft, the carriage and the chassis frame are locked by gravity.

[0009] Furthermore, the lower end of the hook is rotatably mounted on the front end of the carriage through a pin shaft, and a baffle is also provided on the carriage. The baffle is located in front of the lower part of the hook so that the upper end of the hook can maintain a state of tilting forward. After the carriage rises to a set position and the power of the cylinder disappears, the upper end of the hook is automatically connected to the hanging shaft.

[0010] Furthermore, the locking mechanism includes a handle rotatably mounted on the chassis frame, a shift block is fixed on the handle, and when the handle is rotated, the shift block pushes the hook to rotate backward to disengage the hook from the hanging shaft.

[0011] Furthermore, the upper edge of the independent suspension is connected to the chassis frame via a suspension chain.

[0012] Furthermore, the buffer device is a buffer airbag, and the chassis frame is provided with a limit block, and the limit block is located between the hinge point of the airbag and the chassis frame and opposite to the edge of the independent suspension.

[0013] Furthermore, a power unit is provided at the front end of the chassis frame, and the power unit includes a hydraulic pump, a battery and an electric control switch. The hydraulic pump is connected to the oil cylinder through a pipeline, and the hydraulic pump is electrically connected to the battery and the electric control switch.

[0014] Furthermore, a winch is provided at the front end of the inner side of the carriage.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The hydraulic lifting flatbed trailer of the utility model comprises a chassis frame and a carriage slidably mounted on the chassis frame, independent suspensions are respectively arranged on both sides of the chassis frame, the independent suspensions are hinged to the chassis frame and a buffer device is arranged between the two, and a wheel hub is rotatably mounted on the independent suspension; an oil cylinder is hinged between the chassis frame and the front end of the carriage, a guide structure is cooperatively arranged between the side of the carriage and the chassis frame, the guide structure keeps the carriage horizontal when the carriage is lifted and lowered, and the carriage can fall to the ground when it is lowered; a locking mechanism is arranged between the front end of the carriage and the chassis frame, after the carriage rises to a set position, the locking mechanism locks the carriage and the chassis frame, when the carriage is lowered, it can fall smoothly to the ground, no external equipment is needed to load and unload vehicles such as excavators, the use is convenient, the carriage can be reliably locked when the carriage rises to a set position, and the use safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model hydraulic lifting flatbed trailer;

[0018] Figure 2 It is a schematic diagram of the state in which the carriage of the hydraulic lifting flatbed trailer of the utility model is on the ground;

[0019] Figure 3 It is a partial schematic diagram of the front end of the hydraulic lifting flatbed trailer of the utility model;

[0020] Figure 4 It is a structural diagram of the carriage;

[0021] Figure 5 yes Figure 4 The enlarged schematic diagram of the middle A part;

[0022] Figure 6 is a schematic diagram of the locking mechanism;

[0023] Figure 7 It is a schematic diagram of the structure between the independent suspension and the chassis frame;

[0024] In the figure, 100-chassis frame, 110-traction structure, 111-support leg, 121-oil cylinder, 122-battery, 123-hydraulic pump, 131-rotating shaft, 140-locking mechanism, 141-hanging shaft, 142-handle, 143-shift block, 151-independent suspension, 152-wheel hub, 153-pressure plate, 154-buffer airbag, 155-lifting chain, 156-limiting block, 161-spare tire, 200-carriage, 201-winch, 211-guide rail, 212-reinforcement rod, 221-hook, 222-baffle. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the protection scope of the present invention.

[0026] like Figure 1 , Figure 2 and Figure 7 As shown in the figure, the hydraulic lifting flatbed trailer includes a chassis frame 100 and a carriage 200 slidably mounted on the chassis frame 100. Independent suspensions 151 are respectively provided on both sides of the chassis frame 100. The independent suspensions 151 are hinged to the chassis frame 100 and a buffer device is provided between the two. A wheel hub 152 is rotatably installed on the independent suspension 151. An oil cylinder 121 is hinged between the chassis frame 100 and the front end of the carriage 200. A guide structure is provided between the side of the carriage 200 and the chassis frame 100. When the carriage 200 is raised or lowered, the guide structure keeps the carriage 200 horizontal and can fall to the ground when it is lowered. A locking mechanism 140 is provided between the front end of the carriage 200 and the chassis frame 100. After the carriage 200 rises to a set position, the locking mechanism 140 locks the carriage 200 with the chassis frame 100.

[0027] like Figure 3 As shown, the front end of the chassis frame 100 is provided with a traction structure 110 and a power unit, the power unit includes a lifting button, a battery 122 and a hydraulic pump 123, one end of the oil cylinder 121 is hinged to the lower part of the traction structure 110, and the other end is hinged to the front end of the carriage 200. The traction structure 110 is used to connect with the front vehicle, and a support leg 111 is provided on one side of the traction structure 110. The fixing ring on the support leg 111 is locked with the traction structure 110 by bolts, and the bottom end is supported on the ground. The fixing ring is adjustable in height, and the traction structure 110 can be supported when the trailer is idle. The traction structure 110 is a conventional structure on the trailer in the prior art, and the specific structure is not described here.

[0028] like Figure 1 and Figure 2 As shown in the figure, the oil cylinder 121 can be a one-way oil cylinder. When the carriage 200 descends, the hydraulic pump 123 does not work. The carriage 200 falls to the ground along the guide structure under its own gravity. At this time, the oil cylinder 121 extends until the carriage 200 falls flat on the ground. The excavator or other equipment such as the car can be directly driven onto the trailer, and the rope is passed through the lock on the bottom of the carriage 200 to fix the vehicle or equipment to prevent shaking. When the carriage 200 needs to rise, the lifting button is actuated, and the hydraulic pump 123 works to retract the oil cylinder 121. After the carriage 200 rises to a certain height to the set position and is locked, it can be transported.

[0029] In order to avoid the problem that the car 200 falls by its own gravity and the speed is uncontrollable when using a one-way cylinder 121, the cylinder 121 can also be a two-way cylinder, and the extension or retraction speed of the cylinder 121 can be controlled by a lifting button, so that the lifting and lowering speeds of the car 200 can be controlled.

[0030] like Figure 3 As shown, a winch 201 is provided at the front end of the inner side of the carriage 200, and some unpowered equipment can be towed to the trailer by the winch 201. The winch 201 can be a manual winch or an electric winch.

[0031] like Figure 1 , Figure 2 and Figure 4As shown together, the guide structure includes guide rails 211 and rollers (not shown) respectively arranged on the carriage 200 and the chassis frame 100, and the rollers are rotatably installed in the guide rails 211. Specifically, two guide rails 211 are respectively arranged on the left and right sides of the carriage 200, and rollers are rotatably installed at the corresponding positions on the left and right sides of the chassis frame 100 through the rotating shaft 131, and the guide structure has a good supporting effect. The guide rail 211 is a linear structure and the upper end is inclined toward the front end of the carriage 200. The rear side of the chassis frame 100 is open. When the carriage 200 falls, it moves downward and backward, and when the carriage 200 rises, it moves forward and upward.

[0032] The side of the car body 200 is a frame structure with a light overall weight. A reinforcing rod 212 is provided on the side of the car body 200. The reinforcing rod 212 is connected between the two guide rails 211 and between the frame on the side of the car body 200 and the guide rail 211, which can enhance the strength of the guide rail 211 and increase the safety of the trailer.

[0033] like Figure 5 and Figure 6 As shown together, a locking mechanism 140 is provided between the front end of the carriage 200 and the chassis frame 100. After the carriage 200 rises to a set position, the locking mechanism 140 locks the carriage 200 and the chassis frame 100 to prevent the carriage 200 from falling during transportation, thereby further increasing the safety of the trailer.

[0034] Specifically, the locking mechanism 140 includes a hook 221 installed on the carriage 200 and a hanging shaft 141 installed on the chassis frame 100. When the hook 221 is hung on the hanging shaft 141, the carriage 200 and the chassis frame 100 are locked by gravity.

[0035] The lower end of the hook 221 is rotatably mounted on the front end of the carriage 200 through a pin shaft. After the carriage 200 rises to a set position and the power of the oil cylinder 121 disappears, the upper end of the hook 221 is hooked on the hanging shaft 141. The carriage 200 is also provided with a baffle 222, which is located in front of the lower part of the hook 221 to keep the upper end of the hook 221 tilted forward. After the carriage 200 rises to a set position and the power of the oil cylinder 121 disappears, the upper end of the hook 221 is automatically hooked on the hanging shaft 141, no manual operation is required, and it is more convenient to use.

[0036] The specific process is that when the carriage 200 rises, since the hook 221 tilts forward at a certain angle, when it is about to rise to the maximum height, the outer edge of the hook 221 will contact the hanging shaft 141, forcing the hook 221 to rotate backward. At this time, the hook 221 will not be separated from the hanging shaft 141; when the carriage 200 rises to the maximum height, the hook 221 tilts forward and rotates forward due to its own gravity, and is stuck in the position above the hanging shaft 141; then the cylinder 121 does not work, and the carriage 200 falls a very small distance, and the hook 221 is finally hung on the hanging shaft 141, and is not easy to fall off under the action of the gravity of the carriage 200.

[0037] Furthermore, the locking mechanism 140 also includes a handle 142 rotatably mounted on the chassis frame 100, and a shifting block 143 is fixed on the handle 142. When the carriage 200 is ready to fall, the electric control switch is pressed to make the oil cylinder 121 continue to retract, and the carriage 200 rises (the rising amount is very small), so that the hook 221 fixing the carriage 200 is not subjected to force, and then the locking handle 142 is rotated, and the shifting block 143 pushes the hook 221 to rotate backwards to disengage the hook 221 from the hanging shaft 141, so that the hook 221 is disengaged from the hanging shaft 141 on the chassis frame 100, and the hook 221 is rotated backwards to completely disengage from the hanging shaft 141, and at the same time, the oil cylinder 121 is stopped from working or the oil cylinder 121 is controlled to extend, and the carriage 200 falls by gravity. Among them, the mating surfaces of the shifting block 143 and the hook 221 are both arc surfaces.

[0038] like Figure 7 As shown, in order to make the carriage 200 drop horizontally, the wheel hub 152 cannot use a through-axle. Based on this, the wheel hub 152 of the present application adopts an independent suspension structure. Specifically, the two sides of the chassis frame 100 are respectively hinged to the wheel hub 152 through the independent suspension 151, and the wheel hub 152 is rotatably connected to the tire. As shown in the figure, the independent suspension 151 is a triangular structure, and the two lower corners are respectively hinged to the chassis frame 100 and the wheel hub 152.

[0039] The buffer device is a buffer airbag 154. Specifically, pressure plates 153 are respectively arranged on both sides of the buffer airbag 154, one of which is connected between the buffer airbag 154 and the chassis frame 100, and the other is vertically fixed to one side of the upper corner of the independent suspension 151 and is not connected to the buffer airbag 154, thereby ensuring that the pressure on the buffer airbag 154 is uniform and playing an effective buffering role during driving.

[0040] Furthermore, the upper edge of the independent suspension 151 is connected to the chassis frame 100 via a suspension chain 155, which can prevent the tire from detaching from the chassis frame 100, is not easily damaged, and can avoid collision between the tire and the chassis frame 100 when the pressure of the buffer airbag 154 is relatively low.

[0041] Furthermore, the chassis frame 100 is provided with a limit block 156, which is located between the hinge point of the buffer airbag 154 and the chassis frame 100 and opposite to the edge of the independent suspension 151, so as to prevent the buffer airbag 154 from having low air pressure or bursting, thereby preventing the tire from colliding with the chassis frame 100 and being damaged.

[0042] like Figure 1 and Figure 2 As shown in the figure, a spare tire 161 is also provided on the chassis frame 100. When a tire in use is damaged, it can be replaced in time to ensure the normal running of the trailer.

[0043] The hydraulic lifting flatbed trailer of the utility model installs a carriage on the chassis frame by sliding through a guide structure. The chassis frame and the front end of the carriage are hinged with an oil cylinder. The carriage can fall to the ground smoothly under the guide support of the guide structure. Excavators, cars and other equipment can be directly driven onto the trailer. Then, the trailer carriage is lifted for transportation. No external equipment is needed for loading and unloading. The utility model is also applicable to vehicles such as sports cars with low chassis, and has strong versatility.

[0044] In the description of this specification, it should be understood that the descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In the description of this specification, unless otherwise clearly defined, words such as "setting", "installation", and "connection" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in this utility model based on the specific content of the technical solution.

[0046] Although the specific implementation methods of the utility model are described above, those skilled in the art should understand that the described embodiments are only part of the implementation methods of the utility model, rather than all the implementation methods, which are only examples, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various changes or modifications to these implementation methods without departing from the principle and essence of the utility model and without any creative work, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A hydraulic lift flatbed trailer, comprising a chassis frame and a carriage slidably mounted on the chassis frame, independent suspensions are respectively arranged on both sides of the chassis frame, the independent suspensions are hinged to the chassis frame and a buffer device is arranged between the two, and a wheel hub is rotatably mounted on the independent suspension; characterized in that: An oil cylinder is hinged between the chassis frame and the front end of the carriage, and a guide structure is provided between the side of the carriage and the chassis frame. When the carriage is raised or lowered, the guide structure keeps the carriage horizontal and allows the carriage to fall to the ground when it is lowered. A locking mechanism is provided between the front end of the carriage and the chassis frame. After the carriage rises to a set position, the locking mechanism locks the carriage and the chassis frame.

2. The hydraulic lift flatbed trailer according to claim 1, characterized in that: The guide structure comprises a guide rail and a roller, wherein the roller is rotatably mounted in the guide rail, two guide rails are respectively arranged on the left and right sides of the carriage, and the roller is rotatably mounted at a corresponding position of the chassis frame.

3. The hydraulic lift flatbed trailer according to claim 2, characterized in that: The guide rail is a straight structure and the upper end thereof is inclined toward the front end of the carriage.

4. The hydraulic lift flatbed trailer according to claim 1, characterized in that: The locking mechanism comprises a hook installed on the carriage and a hanging shaft installed on the chassis frame. When the hook is hung on the hanging shaft, the carriage and the chassis frame are locked by gravity.

5. The hydraulic lift flatbed trailer according to claim 4, characterized in that: The lower end of the hook is rotatably mounted on the front end of the carriage through a pin shaft. A baffle is also provided on the carriage. The baffle is located in front of the lower part of the hook to keep the upper end of the hook tilted forward. After the carriage rises to a set position and the power of the cylinder disappears, the upper end of the hook is automatically connected to the hanging shaft.

6. The hydraulic lift flatbed trailer according to claim 4, characterized in that: The locking mechanism comprises a handle rotatably mounted on the chassis frame, a shift block is fixed on the handle, and when the handle is rotated, the shift block pushes the hook to rotate backwards so that the hook is unhooked from the hanging shaft.

7. The hydraulic lift flatbed trailer according to claim 1, characterized in that: The upper side edge of the independent suspension is connected to the chassis frame via a suspension chain.

8. The hydraulic lift flatbed trailer according to claim 1, characterized in that: The buffer device is a buffer airbag, and the chassis frame is provided with a limit block, which is located between the hinge point of the airbag and the chassis frame and opposite to the edge of the independent suspension.

9. The hydraulic lift flatbed trailer according to claim 1, characterized in that: A power unit is arranged at the front end of the chassis frame, and the power unit comprises a hydraulic pump, a battery and an electric control switch. The hydraulic pump is connected to the oil cylinder through a pipeline, and the hydraulic pump is electrically connected to the battery and the electric control switch.

10. The hydraulic lift flatbed trailer according to any one of claims 1 to 9, characterized in that: A winch is arranged at the front end of the inner side of the carriage.

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