CN110758558A

CN110758558A - Trailer

Info

Publication number: CN110758558A
Application number: CN201910537644.7A
Authority: CN
Inventors: 房坤; 瞿绘军; 蔡加加; 刘晨
Original assignee: Yangzhou Zhongji Tonghua Special Vehicle Co Ltd
Current assignee: Yangzhou Zhongji Tonghua Special Vehicle Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-02-07

Abstract

The invention relates to the technical field, in particular to a trailer. The hydraulic vehicle comprises a vehicle frame, a vehicle axle and an oil pressure pipeline; the frame comprises two longitudinal beams and a cross beam fixed between the two longitudinal beams; the axle is arranged at the bottom of the frame; the oil pressure pipeline is arranged on the side surface of the cross beam and the inner side surface of the longitudinal beam; the oil pressure pipeline is provided with a hydraulic execution device and an energy accumulator; one end of the hydraulic actuating device is connected to the longitudinal beam, and the other end of the hydraulic actuating device is connected to the end portion of the axle, so that the side portion of the frame can be lifted. The trailer is kept stable, and the trailer is effectively restrained from inclining laterally, so that the side turning is prevented, and the transportation safety is ensured.

Description

Trailer

Technical Field

The invention relates to the technical field of transport tools, in particular to a trailer.

Background

A trailer refers to a vehicle that is towed by a car without power drive per se. Generally, the type of trailer is great, and the weight and the volume of the goods of transporting are great for medium and long distance cargo transportation, in the transportation of trailer, meet complicated road conditions with being difficult to avoid, for example when one side tire of trailer is empty, the trailer takes place to heels, takes place to turn on one's side when serious, influences transportation safety.

Disclosure of Invention

The invention aims to provide a trailer to solve the problem that the existing trailer is difficult to control the side inclination to cause the side overturning.

The purpose of the invention is realized by the following technical scheme:

the invention provides a trailer, which comprises a frame, an axle and an oil pressure pipeline; the frame comprises two longitudinal beams and a cross beam fixed between the two longitudinal beams; the axle is arranged at the bottom of the frame; the oil pressure pipeline is arranged on the side surface of the cross beam and the inner side surface of the longitudinal beam; the oil pressure pipeline is provided with a hydraulic execution device and an energy accumulator; one end of the hydraulic actuating device is connected to the longitudinal beam, and the other end of the hydraulic actuating device is connected to the end of the axle, so that the side portion of the frame can be lifted.

In one embodiment, the hydraulic executing device is an actuator, and the actuator comprises a cylinder body, a plug body arranged in the cylinder body in a sliding manner, a telescopic rod fixed on the plug body, and an air pump arranged on the cylinder body; the telescopic rod penetrates through the cylinder body; the plug body divides the space in the cylinder body into an oil pressure chamber and an air pressure chamber, the oil pressure chamber is communicated with the oil pressure pipeline, and the air pressure chamber is communicated with the air pump; the cylinder body is connected with the longitudinal beam, and the telescopic rod is connected with the axle; the trailer also comprises a sensor for detecting the running state of the frame and a controller electrically connected with the sensor; the controller is electrically connected with the air pump to control the pressure in the air pressure cavity, so that the telescopic rod is driven to move along the cylinder body.

In one embodiment, the hydraulic pipeline includes two hydraulic pipelines, the two hydraulic pipelines are respectively installed at two side portions of the frame, and the accumulator and the actuator are respectively installed on each of the hydraulic pipelines.

In one embodiment, the oil pressure line further comprises a connecting line; the oil cavity of the energy accumulator on one oil pressure pipeline is communicated with the oil cavity of the energy accumulator on the other oil pressure pipeline through the connecting pipeline, and a valve is arranged on the connecting pipeline.

In one embodiment, the accumulator is a gas accumulator; the trailer further comprises a communicating pipeline and two air pressure pipelines, the two air pressure pipelines are arranged corresponding to the two oil pressure pipelines one by one, two ends of each air pressure pipeline are respectively communicated with the corresponding air cavity of the gas type energy accumulator on the oil pressure pipeline and the air pump of the actuator, the air cavity of the gas type energy accumulator on one oil pressure pipeline is communicated with the air cavity of the gas type energy accumulator on the other oil pressure pipeline through the communicating pipeline, and a switch valve is arranged on the communicating pipeline.

In one embodiment, a damping valve is disposed on each of the two oil pressure lines, and the damping valve is located between the actuator and the accumulator.

In one embodiment, two mounting brackets are fixed on the side surface of the middle part of the cross beam, and the damping valves on the two hydraulic pipelines are correspondingly mounted and fixed on the two mounting brackets one by one.

In one embodiment, two fixing brackets are fixed on the side surface of the middle part of the cross beam, and the energy accumulators on the two oil pressure pipelines are correspondingly installed and fixed on the two fixing brackets one by one.

In one embodiment, the actuator further includes two lifting lugs, the two lifting lugs are fixed to the outer end of the telescopic rod and the cylinder bottom of the cylinder body in a one-to-one correspondence manner, the telescopic rod is rotatably connected with the axle through the lifting lugs, and the cylinder body is rotatably connected with the frame through the lifting lugs.

In one embodiment, a tank body is mounted on the frame, a pipeline is arranged on the bottom surface of the tank body, and the pipeline extends between the two longitudinal beams; the accumulator is remote from the conduit.

In one embodiment, the hydraulic actuating device is a single-action hydraulic cylinder, and the single-action hydraulic cylinder comprises a cylinder barrel and a piston rod penetrating through the cylinder barrel; the piston rod is connected with the end part of the axle, and the cylinder barrel is connected with the longitudinal beam.

According to the technical scheme, the invention has the advantages and positive effects that: the axle is installed to the bottom of frame, is provided with the oil pressure pipeline on the side of the crossbeam of frame and the medial surface of longeron ingeniously, and the space in the frame is utilized rationally to the oil pressure pipeline ingeniously, does not cause the interference to other parts of frame. The hydraulic pipeline is stored with hydraulic oil, and the hydraulic pipeline is provided with a hydraulic executing device and an energy accumulator, and the hydraulic executing device is connected between the frame and the axle. When one side of the trailer is empty and heels, the pressure of the side with the higher position of the frame is increased, the hydraulic actuating device is contracted, the side part of the frame is lowered, and the hydraulic oil in the hydraulic actuating device at the side flows out to flow into the energy accumulator through the hydraulic pipeline; the pressure of the lower side of the frame is reduced, the energy accumulator releases compression energy, hydraulic oil in the energy accumulator flows outwards and flows into the hydraulic actuating device of the side through the hydraulic pipeline, the hydraulic actuating device of the side extends, the side portion of the frame rises, the trailer is kept stable, the trailer is effectively restrained from inclining laterally, the side turning is prevented, and the transportation safety is ensured.

Drawings

For the purpose of easy explanation, the present invention will be described in detail with reference to the following preferred embodiments and the accompanying drawings.

FIG. 1 is a schematic structural diagram of a trailer according to an embodiment of the present invention;

FIG. 2 is a side view of the trailer shown in FIG. 1;

FIG. 3 is a schematic diagram of the hydraulic line of the trailer according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of a first cross member of a trailer according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a fixed bracket of a trailer according to an embodiment of the invention;

FIG. 6 is a schematic structural view of a second cross member of the trailer according to an embodiment of the present invention;

FIG. 7 is a schematic illustration of the trailer of the present invention in a configuration for loading a tank;

FIG. 8 is a rear view of the trailer shown in FIG. 7;

fig. 9 is a schematic structural diagram of a hydraulic actuator of a trailer according to an embodiment of the invention.

Description of reference numerals: 1. a frame; 11. a stringer; 12. a first cross member; 13. a second cross member; 14. a third cross member; 15. a spring holder; 2. an axle; 3. an oil pressure line; 31. a hydraulic actuator; 311. lifting lugs; 312. a cylinder body; 313. a telescopic rod; 32. an accumulator; 321. fixing a bracket; 33. a damping valve; 331. mounting a bracket; 34. a hydraulic line; 341. a first branch; 342. a second branch circuit; 343. a third branch; 344. a fourth branch; 4. a tank body; 5. a wheel; 6. a pneumatic pipeline; 61. a pneumatic line; 611. a first gas path; 612. a second gas path; 613. a third gas path; 614. and a fourth gas path.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention provides a trailer which is used for effectively controlling side tipping, so that side tipping is prevented, and transportation safety is ensured.

Referring to fig. 1, in the present embodiment, the trailer includes a frame 1, an axle 2 installed at the bottom of the frame 1, an oil pressure pipeline 3 installed in the frame 1, a hydraulic actuator 31 disposed on the oil pressure pipeline 3, and an accumulator 32 disposed on the oil pressure pipeline 3.

The frame 1 has two side portions, and the two side portions of the frame 1 face each other in the width direction of the frame 1. Hydraulic oil is stored in the hydraulic line 3. The hydraulic actuator 31 and the accumulator 32 communicate with each other through the oil pressure line 3. When the hydraulic actuator 31 contracts, the hydraulic oil in the hydraulic actuator 31 is less, and the hydraulic oil in the accumulator 32 is more, so that the accumulator 32 has larger compression energy. The two ends of the hydraulic actuator 31 are respectively connected to the side part of the frame 1 and the end part of the axle 2, and are matched with the accumulator 32 to control the inclination angle of the frame 1 so as to adjust the gravity center of the frame 1, thereby inhibiting the trailer from rolling and preventing the trailer from rolling over.

Specifically, the frame 1 includes two side members 11, and a plurality of cross members fixed between the two side members 11.

A spring bracket 15 is fixedly mounted on the outer side surface of the longitudinal beam 11. The longitudinal beam 11 is an i-beam. The side member 11 is located at a position corresponding to a side portion of the vehicle frame 1. The side face of the longitudinal beam 11 connected with the cross beam is an inner side face of the longitudinal beam 11, and the side face of the longitudinal beam 11 departing from the cross beam is an outer side face of the longitudinal beam 11.

Referring to fig. 1 and 2, there are three beams, and three beams are arranged in parallel at intervals. The three beams are divided into a first beam 12, a second beam 13 and a third beam 14. The second beam 13 is located between the first beam 12 and the third beam 14. Of course, the number of the cross beams can also be two or more than three, and the cross beams are spaced from each other.

The first cross member 12 is the cross member closest to the head of the frame 1 among the three cross members, wherein the head of the frame 1 refers to the portion of the frame 1 for connecting a tractor. Two fixing brackets 321 are fixedly arranged in the middle of the side surface of the first cross beam 12. Referring to fig. 4 and 5, a side of the fixing bracket 321 away from the first beam 12 is provided with a screw hole.

Of course, the fixing bracket 321 may be mounted on the inner side surface of the longitudinal beam 11, the second cross beam 13, the third cross beam 14, or other positions of the first cross beam 12, without affecting the normal arrangement of the oil pressure line 3, and without interfering with the components of the trailer.

Referring to fig. 6, two mounting brackets 331 are fixedly mounted on the side surface of the middle portion of the second beam 13, and screw holes are formed on the top surfaces of the mounting brackets 331.

Of course, the mounting bracket 331 may be mounted on the inner side surface of the side member 11, the first cross member 12, the third cross member 14, or the second cross member 13 at other positions without affecting the normal arrangement of the oil pressure line 3 and without interfering with the components of the trailer.

Referring to fig. 1, the axle 2 is generally parallel to the cross member. The number of the axles 2 is three, and the three axles 2 are arranged in parallel at intervals along the length direction of the longitudinal beam 11. The triple axle 2 is arranged corresponding to a triple cross member. Of course, two or more than three axles 2 can also be used.

Six hydraulic actuators 31 are provided, and the six hydraulic actuators 31 are mounted on both ends of the three-axle 2 in a one-to-one correspondence.

Referring to fig. 9, the hydraulic actuator 31 is an actuator, and the actuator includes a cylinder 312, a plug (not shown) slidably disposed in the cylinder 312, an expansion rod 313 fixed to the plug, and an air pump (not shown) disposed on the cylinder 312.

The telescopic rod 313 penetrates through the end face of the cylinder body 312, the outer end of the telescopic rod 313 penetrates through the cylinder body 312, and the outer end of the telescopic rod 313 is connected with the axle 2. The plug body is sealingly connected to the inner wall of the cylinder 312. The plug body divides the space in the cylinder 312 into two chambers, which are divided into an air pressure chamber (not shown) and an oil pressure chamber (not shown), the oil pressure chamber is communicated with the oil pressure pipeline 3, and the air pressure chamber is communicated with the air pump. The cylinder 312 is connected to the spring holder 15.

Further, the actuator further includes two lifting lugs 311, and the two lifting lugs 311 are fixed on the outer end of the telescopic rod 313 and the bottom of the cylinder 312 in a one-to-one correspondence manner. The telescopic rod 313 is rotatably connected with the axle 2 through the lifting lug 311, and the cylinder 312 is rotatably connected with the spring bracket 15 through the lifting lug 311, so that the work of an actuator is facilitated.

The trailer further comprises a sensor (not shown) for detecting the driving state of the frame 1, and a controller (not shown) electrically connected to the sensor.

The sensor is mounted on the frame 1. The sensors include acceleration sensors and gyro sensors.

The controller is electrically connected with the air pump and receives the signals transmitted by the sensor. If the sensor detects that the trailer heels, the controller controls the air pump to work, adjusts the air pressure in the air pressure chamber, enables the pressure in the air pressure chamber and the pressure in the hydraulic pressure chamber to be dynamically balanced, controls the telescopic rod 313 to stretch and contract, adjusts the gravity center of the frame 1, and accordingly restrains the trailer from heeling.

Referring to fig. 1, there are two energy accumulators 32, the two energy accumulators 32 are correspondingly mounted and fixed on the two fixing brackets 321, and the energy accumulator 32 is located in the middle of the first cross beam 12 to increase the stability of the trailer. Specifically, the accumulator 32 is fixed to the fixing bracket 321 by a bolt that is screw-fitted to a screw hole on the fixing bracket 321.

The accumulator 32 is a gas accumulator 32, the gas accumulator 32 has a gas chamber (not shown) and an oil chamber (not shown), the gas chamber and the oil chamber are two separate spaces, and the volume of the gas chamber can be changed, taking the bellows type accumulator 32 as an example, the inflatable or deflatable bellows corresponds to the gas chamber, and the rigid pressure tank corresponds to the oil chamber. The oil chamber is communicated with the oil pressure pipeline 3 and is used for storing hydraulic oil. The air chamber is reduced or increased with a change in pressure in the oil chamber, thereby accumulating compression energy or releasing compression energy.

Referring to fig. 1 and 3, the hydraulic line 3 includes two hydraulic lines 34, the two hydraulic lines 34 are correspondingly installed on two sides of the frame 1, and the two hydraulic lines 34 are symmetrical.

Specifically, the oil pressure line 34 includes a first branch 341, a second branch 342, and a third branch 343.

One ends of the first branch 341, the second branch 342, and the third branch 343 are in one-to-one correspondence with hydraulic chambers of three actuators on one side of the frame 1, and the other ends of the first branch 341, the second branch 342, and the third branch 343 are all in communication with an oil pressure chamber of the gas accumulator 32, in other words, the three hydraulic actuators 31 on the oil pressure line 34 share one accumulator 32.

The hydraulic line 34 further includes a fourth branch 344, and the first branch 341, the second branch 342, and the third branch 343 are all connected to the oil chamber of the gas accumulator 32 through the fourth branch 344, so as to optimize the structure of the hydraulic line 34. In other words, the fourth leg 344 serves as a summarized leg.

The damper valve 33 is installed in the fourth branch 344, and the damper valve 33 damps the impact of the hydraulic oil in the hydraulic line 34 to increase the damping, so that the flow of the hydraulic oil is smooth.

The damping valves 33 on the fourth branches 344 are correspondingly mounted on the two mounting brackets 331 fixed on the second cross beam 13, and the damping valves 33 are located in the middle of the second cross beam 13, so that the stability of the trailer is improved. Specifically, the damper valve 33 is fixed to the fixing bracket 321 by bolts that are screw-fitted to screw holes on the mounting bracket 331.

The first branch 341 is attached to the inner side surface of the side member 11 and the side surface of the second cross member 13, the second branch 342 is attached to the inner side surface of the side member 11 and the side surface of the second cross member 13, and the third branch 343 is attached to the inner side surface of the side member 11 and the side surface of the second cross member 13.

An energy accumulator 32 and a damping valve 33 are arranged on the two hydraulic pipelines 34, so that unbalance of compensation forces on two sides of the frame 1 is prevented when the interconnected suspension works and compensates, and the trailer is prevented from rolling in use.

The oil pressure pipeline 3 further includes a connecting line (not shown), wherein the oil chamber of the accumulator 32 on one oil pressure pipeline 34 is communicated with the oil chamber of the accumulator 32 on the other oil pressure pipeline 34 through the connecting line, and specifically, both ends of the connecting branch are respectively communicated with the fourth branch 344. The connecting branch is provided with a valve, when one accumulator 32 fails, the valve is opened, and the two hydraulic pipelines 34 share one accumulator 32, so that the actuator on the branch where the failed accumulator 32 is located can work normally.

The trailer further comprises a pneumatic pipeline 6, and the pneumatic pipeline 6 is used for communicating the air pump of the actuator with the air cavity of the gas accumulator 32, so that the interaction between the actuator and the gas accumulator 32 is facilitated.

Specifically, the oil pressure chamber of the actuator corresponds to the bottom of the cylinder body 312, the air pressure chamber of the actuator corresponds to the top of the cylinder body 312, when the expansion link 313 is required to extend, the air pump works, the air in the air pressure chamber of the actuator is conveyed into the air cavity of the air accumulator 32, so that the pressure in the air pressure chamber of the actuator becomes small, the pressure in the air cavity of the accumulator 32 becomes large, the hydraulic oil in the oil cavity of the accumulator 32 is facilitated to flow outwards, the hydraulic oil in the oil pressure pipeline 34 flows into the oil pressure chamber of the actuator, and the plug body moves towards the top of the cylinder body 312, and the expansion link 313 extends. On the contrary, when the telescopic rod 313 is required to be contracted, the air pump works to convey the air in the air cavity of the air type energy accumulator 32 to the air pressure chamber of the actuator, so that the pressure in the air pressure chamber of the actuator is increased, the pressure in the air cavity of the energy accumulator 32 is decreased, the hydraulic oil in the oil pressure chamber of the actuator is facilitated to flow outwards, the hydraulic oil in the oil pressure pipeline 34 flows into the oil cavity of the energy accumulator 32, and the plug body moves towards the bottom of the cylinder body 312, and the telescopic rod 313 is contracted.

Further, the pneumatic line 6 includes a communication line (not shown) and two pneumatic lines 61.

The two air pressure lines 61 are arranged in one-to-one correspondence with the two oil pressure lines 34, in other words, the two air pressure lines 61 are arranged at both side portions of the frame 1, respectively. Both ends of the pneumatic line 61 are respectively communicated with the air chamber of the accumulator 32 and the air pump of the actuator on the corresponding hydraulic line 34.

Specifically, the oil pressure line 34 includes a first air passage 611, a second air passage 612, and a third air passage 613.

The first air passage 611, the second air passage 612 and the third air passage 613 are all installed on the inner side surface of the longitudinal beam 11. One ends of the first air passage 611, the second air passage 612 and the third air passage 613 are communicated with the air pressure chambers of the three actuators on one side portion of the frame 1 in a one-to-one correspondence manner, and the other ends of the first air passage 611, the second air passage 612 and the third air passage 613 are communicated with the air chambers of the gas accumulator 32.

The oil pressure line 34 further includes a fourth air passage 614, and the first air passage 611, the second air passage 612 and the third air passage 613 are all communicated with the air chamber of the gas accumulator 32 through the fourth air passage 614, which optimizes the structure of the gas pressure line 61. In other words, the fourth path 614 serves as a collective path.

The pneumatic circuit 6 further includes a communication line (not shown), wherein the air chamber of the accumulator 32 on one hydraulic line 34 is communicated with the air chamber of the accumulator 32 on the other hydraulic line 34 through the communication line, and specifically, both ends of the communication line are respectively communicated with the two fourth air passages 614. The communicating pipelines are provided with switch valves, when one accumulator 32 fails, the switch valves are opened, and the two hydraulic pipelines 34 share one accumulator 32, so that the actuator on the branch where the failed accumulator 32 is located can work normally. It is worth mentioning that the on-off valve on the communication line and the valve on the connection line are opened or closed simultaneously.

Referring to fig. 7 and 8, the tank 4 is mounted on the frame 1, and a duct is disposed on the bottom surface of the middle rear portion of the tank 4, and extends into the frame 1, specifically, extends between the two longitudinal beams 11, and is substantially located at the tail of the frame 1. The accumulator 32 is spaced from the pipe of the tank 4, and a large distance exists between the accumulator 32 and the pipe of the tank 4, so that the accumulator 32 is prevented from interfering with the pipe of the tank 4.

The trailer also comprises wheels 5 mounted on two ends of the axle 2. it is worth mentioning that the tires mounted on the ends of the axle 2 are single, in other words, the trailer adopts a single-tire structure, the section of the single tire is wider, and the distance between two wheels 5 on the same axle 2 is increased, as the wheel distance of the axle 2 is increased, the distance between two longitudinal beams 11 can be increased, so that the inner space of the frame 1 is larger, and the oil pressure pipeline 3, the energy accumulator 32 and the damping valve 33 are convenient to mount.

In the example, the trailer is a semitrailer, and of course, a full trailer can be adopted, and the frame 1, the axle 2, the oil pressure pipeline 3, the accumulator 32 and the hydraulic actuating device 31 are mutually matched to play a role in preventing side turning.

Referring to fig. 1 and fig. 3, the working principle of the embodiment of the present application is as follows: when one side of the trailer is empty and roll occurs, the pressure on the higher side of the frame 1 increases, and the sensor detects the trailer roll and transmits a signal to the controller. The controller drives the air pump of the actuator on the side to work, the air in the air cavity of the air type energy accumulator 32 is conveyed into the air pressure chamber of the actuator, the pressure in the air pressure chamber of the actuator is increased, the pressure in the air cavity of the energy accumulator 32 is decreased, the hydraulic oil in the oil pressure chamber of the actuator can flow outwards, the hydraulic oil in the oil pressure pipeline 34 flows into the oil cavity of the energy accumulator 32, the plug body moves towards the bottom of the cylinder body 312, the expansion rod 313 of the actuator is contracted, the side part of the frame 1 is lowered, and the hydraulic oil in the oil pressure chamber of the actuator on the side flows outwards and flows into the energy accumulator 32 through the oil pressure pipeline 34.

The pressure of the lower side of the frame 1 is reduced, the energy accumulator 32 releases compression energy, hydraulic oil in the energy accumulator 32 flows outwards and flows into the oil pressure chamber of the actuator at the side through the oil pressure pipeline 3, the controller drives the air pump of the actuator at the side to work, gas in the air pressure chamber of the actuator is conveyed into the air chamber of the gas type energy accumulator 32, so that the pressure in the air pressure chamber of the actuator is reduced, the pressure in the air chamber of the energy accumulator 32 is increased, the hydraulic oil in the oil chamber of the energy accumulator 32 can flow outwards, the hydraulic oil in the oil pressure pipeline 34 flows into the oil pressure chamber of the actuator, the plug body moves towards the top of the cylinder body 312, the telescopic rod 313 of the actuator at the side extends out, the side part of the frame 1 is lifted, the trailer is kept stable, the trailer is effectively restrained from rolling, the side rollover is prevented, and the transportation safety is ensured.

In other embodiments, not shown, the hydraulic actuator is a single-acting hydraulic cylinder, and the single-acting hydraulic cylinder includes a cylinder, a piston slidably disposed in the cylinder, and a piston rod disposed through the cylinder. The piston rod is fixedly connected with the piston, and the piston is connected with the inner wall of the cylinder barrel in a sealing manner.

The cylinder barrel is communicated with an oil pressure pipeline. The bottom of the cylinder barrel is connected with the frame, and the outer end of the piston rod is connected with the axle. Lifting lugs are fixed at the outer end of the piston rod and the bottom of the cylinder barrel, the lifting lugs on the piston rod are rotatably connected with the axle, and the lifting lugs on the cylinder barrel are rotatably connected with the frame. At the moment, a pneumatic pipeline is not required to be installed, and the energy accumulator can also adopt a spring type energy accumulator and a weight type energy accumulator.

The working principle of the embodiment is that when one side of the trailer is empty and heels, the pressure of the side with the higher position of the frame is increased, the piston rod of the single-acting hydraulic cylinder is contracted, the side part of the frame is lowered, and the hydraulic oil in the single-acting hydraulic cylinder on the side flows out and flows into the energy accumulator through the hydraulic pipeline. The pressure of the lower side of the frame is reduced, the energy accumulator releases compression energy, hydraulic oil in the energy accumulator flows outwards and flows into the single-acting hydraulic cylinder on the side through an oil pressure pipeline, the piston rod of the single-acting hydraulic cylinder on the side extends, the side portion of the frame rises, the trailer is kept stable, the trailer is effectively prevented from inclining laterally, and the transportation safety is ensured.

In other embodiments, not shown, three mounting brackets are fixed to the second beam, damping valves are arranged on the first branch, the second branch and the third branch, and the three damping valves are mounted and fixed on the three mounting brackets in a one-to-one correspondence manner, so that the fourth branch is not required.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A trailer, comprising:

the frame comprises two longitudinal beams and a cross beam fixed between the two longitudinal beams;

the axle is arranged at the bottom of the frame;

the oil pressure pipeline is arranged on the side surface of the cross beam and the inner side surface of the longitudinal beam; the oil pressure pipeline is provided with a hydraulic execution device and an energy accumulator; one end of the hydraulic actuating device is connected to the longitudinal beam, and the other end of the hydraulic actuating device is connected to the end of the axle, so that the side portion of the frame can be lifted.

2. The trailer according to claim 1, wherein the hydraulic actuator is an actuator, and the actuator comprises a cylinder body, a plug body slidably disposed in the cylinder body, a telescopic rod fixed on the plug body, and an air pump disposed on the cylinder body; the telescopic rod penetrates through the cylinder body; the plug body divides the space in the cylinder body into an oil pressure chamber and an air pressure chamber, the oil pressure chamber is communicated with the oil pressure pipeline, and the air pressure chamber is communicated with the air pump; the cylinder body is connected with the longitudinal beam, and the telescopic rod is connected with the axle;

the trailer also comprises a sensor for detecting the running state of the frame and a controller electrically connected with the sensor; the controller is electrically connected with the air pump to control the pressure in the air pressure cavity, so that the telescopic rod is driven to move along the cylinder body.

3. The trailer of claim 2, wherein the hydraulic line comprises two hydraulic lines, the two hydraulic lines are respectively mounted on two sides of the frame, and the accumulator and the actuator are disposed on each of the hydraulic lines.

4. The trailer of claim 3, wherein the oil pressure line further comprises a connecting line; the oil cavity of the energy accumulator on one oil pressure pipeline is communicated with the oil cavity of the energy accumulator on the other oil pressure pipeline through the connecting pipeline, and a valve is arranged on the connecting pipeline.

5. The trailer of claim 4, wherein the accumulator is a gas accumulator;

the trailer further comprises a communicating pipeline and two air pressure pipelines, the two air pressure pipelines are arranged corresponding to the two oil pressure pipelines one by one, two ends of each air pressure pipeline are respectively communicated with the corresponding air cavity of the gas type energy accumulator on the oil pressure pipeline and the air pump of the actuator, the air cavity of the gas type energy accumulator on one oil pressure pipeline is communicated with the air cavity of the gas type energy accumulator on the other oil pressure pipeline through the communicating pipeline, and a switch valve is arranged on the communicating pipeline.

6. The trailer of claim 3, wherein a damping valve is provided on each of the oil pressure lines, the damping valve being located between the actuator and the accumulator.

7. The trailer as claimed in claim 6, wherein two mounting brackets are fixed on the side surface of the middle part of the cross beam, and the damping valves on the two hydraulic pipelines are correspondingly mounted and fixed on the two mounting brackets.

8. The trailer as claimed in claim 3, wherein two fixing brackets are fixed on the side of the middle part of the cross beam, and the energy accumulators on the two oil pressure pipelines are correspondingly fixed on the two fixing brackets.

9. The trailer as claimed in claim 2, wherein the actuator further comprises two lifting lugs, the two lifting lugs are fixed on the outer end of the telescopic rod and the bottom of the cylinder body in a one-to-one correspondence manner, the telescopic rod is rotatably connected with the axle through the lifting lugs, and the cylinder body is rotatably connected with the frame through the lifting lugs.

10. The trailer according to claim 1, wherein a tank body is mounted on the frame, and a pipeline is arranged on the bottom surface of the tank body and extends between the two longitudinal beams; the accumulator is remote from the conduit.

11. The trailer according to claim 1, wherein the hydraulic actuator is a single-acting hydraulic cylinder, the single-acting hydraulic cylinder comprises a cylinder barrel and a piston rod penetrating the cylinder barrel; the piston rod is connected with the end part of the axle, and the cylinder barrel is connected with the longitudinal beam.