High-low pressure system of tailboard device

Abstract

The utility model discloses a high-low pressure system of a tailboard device, which comprises a hydraulic device, the hydraulic device comprises a hydraulic pump, an oil supply path and an oil return path, the oil supply path and the oil return path are connected with the hydraulic pump, the hydraulic pump is connected with a main pipeline, the oil supply path comprises a first pressure pipeline and a second pressure pipeline, and the first pressure pipeline is used for providing hydraulic oil for a hydraulic cylinder. The second pressure pipeline is used for providing hydraulic oil for the hydraulic motor, a two-position three-way valve is connected among the main pipeline, the first pressure pipeline and the second pressure pipeline, and the oil return path comprises a first oil return pipeline and a second oil return pipeline which are connected with the main pipeline; the first oil return pipeline is provided with a first two-position two-way valve and a first overflow valve which are sequentially arranged in the flowing direction of hydraulic oil, and the second oil return pipeline is provided with a second two-position two-way valve. High pressure is used for bearing goods, the tail plate uses a low-pressure system under the compartment, impact on the compartment is reduced, the time of the double systems enables the tail plate to adapt to different control systems in different states, and the compartment is protected on the premise that the loading work is met.

Description

Technical Field

[0001] This utility model relates to the technical field of tailgates, and in particular to a high and low pressure system for a tailgate device. Background Technology

[0002] In the field of logistics loading and unloading equipment, the tailgate, as a crucial load-bearing mechanism connecting trucks and ground cargo, directly impacts loading and unloading efficiency, equipment safety, and truck bed lifespan through its power system design. Traditional tailgate power systems generally employ a single pressure mode, typically high-pressure hydraulic drive. While this can meet basic lifting requirements, the single high-pressure system maintains high-pressure output even when the tailgate is retracted or extended from the truck bed, resulting in excessive hydraulic impact. Over time, this can easily cause deformation of the truck bed structure or fatigue damage to connecting components, especially in scenarios with frequent loading and unloading. Furthermore, the high-pressure system drives the tailgate lifting and lowering under no-load conditions, leading to significant energy waste. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a high-low voltage system for a tailgate device, which can solve the energy waste problem of traditional single high-voltage systems, and reduce ineffective energy consumption in low-voltage mode under non-load-bearing scenarios.

[0004] A high and low pressure system for a tailgate device according to an embodiment of the present invention includes a lifting device and a telescopic device connected to each other, and a hydraulic device for providing hydraulic power to the lifting device and the telescopic device. The lifting device is used to drive the tailgate device to lift and lower, and the telescopic device is used to drive the lifting device to retract into or extend out of the bottom of the vehicle body. The lifting device includes a hydraulic cylinder, and the telescopic device includes a linear motion component and a hydraulic motor that drives the linear motion component. The hydraulic device includes a hydraulic pump, a supply oil circuit and a return oil circuit connected to the hydraulic pump. The hydraulic pump is connected to a main pipeline. The supply oil circuit includes a first pressure pipeline and a second pressure pipeline. The first pressure pipeline is used to supply hydraulic oil to the hydraulic cylinder, and the second pressure pipeline is used to supply hydraulic oil to the hydraulic motor. A two-position three-way valve is connected between the main pipeline, the first pressure pipeline and the second pressure pipeline. The return oil circuit includes a first return oil pipeline and a second return oil pipeline connected to the main pipeline. The first return oil pipeline has a first two-position two-way valve and a first overflow valve arranged sequentially along the hydraulic oil flow direction, and the second return oil pipeline has a second two-position two-way valve.

[0005] The high and low voltage system of the tailgate device according to an embodiment of the present utility model has at least the following beneficial effects:

[0006] 1. This utility model, by setting up an oil supply circuit including a first pressure pipe and a second pressure pipe, and by setting up a return oil circuit including a first return oil pipe and a second return oil pipe, allows the hydraulic pump to generate high-pressure hydraulic oil, which is then transported via the main pipeline. A two-position three-way valve switches the transport position of the main pipeline, enabling the high-pressure hydraulic oil to flow to the first pressure pipe. When the tailgate is under load, the high-pressure hydraulic oil is delivered to the hydraulic cylinder, which drives the tailgate to rise under high pressure, meeting the power requirements for heavy-duty operations. Furthermore, the first two-position two-way valve can change the on / off state of the first return oil pipe; when the tailgate retracts into or extends from the bottom of the truck bed, the first return oil pipe... The hydraulic oil in the main pipeline passes through the first return oil pipeline and the first throttle valve, reducing the pressure of the hydraulic oil in the main pipeline. This allows the tailgate device to be raised and lowered to a certain height under low pressure. At the same time, the main pipeline uses a two-position three-way valve to switch the delivery position, allowing the low-pressure hydraulic oil in the main pipeline to flow to the second pressure pipeline. This causes the hydraulic motor to operate at low pressure, allowing the tailgate device to retract into or extend from the bottom of the truck bed, avoiding excessive hydraulic shock to the truck bed. In addition, the second two-position two-way valve can change the open and closed state of the second return oil pipeline. When the tailgate device is lowered without load, the second return oil pipeline is open, and the hydraulic oil in the main pipeline flows through the second return oil pipeline, depressurizing the hydraulic cylinder and allowing the tailgate device to descend to the ground, reducing energy consumption.

[0007] 2. This utility model's dual system, through intelligent switching between high and low voltage modes, not only meets the power requirements of heavy-duty operations but also optimizes equipment protection and energy efficiency. It is suitable for practical scenarios such as logistics loading and unloading, embodying a balance between functionality and economy.

[0008] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a third return oil pipe, a bidirectional hydraulic motor, a first connecting pipe and a second connecting pipe, and a three-position four-way valve connected between the second pressure pipe, the third return oil pipe, the first connecting pipe and the second connecting pipe.

[0009] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes two hydraulic cylinders. The first pressure pipe has a first branch pipe and a second branch pipe, and the two hydraulic cylinders are respectively connected to the first branch pipe and the second branch pipe.

[0010] According to an embodiment of the present invention, a high and low pressure system for a tailgate device is provided, wherein the first pressure pipeline is equipped with a one-way speed regulating valve.

[0011] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a main pipeline having a check valve, which is used to prevent hydraulic oil from flowing back into the hydraulic pump.

[0012] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a main pipeline having a throttle valve, wherein the throttle valve and the check valve are arranged sequentially along the hydraulic oil flow direction.

[0013] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a main pipeline having a fourth return oil pipeline, wherein the fourth return oil pipeline is provided with a second overflow valve.

[0014] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a filter at the oil inlet of the hydraulic pump for filtering hydraulic oil.

[0015] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a linear motion component comprising a meshing gear and a rack, a hydraulic motor being connected to the gear, and the rack being connected to the lifting device via a bracket.

[0016] According to an embodiment of the present invention, a high and low pressure system for a tailgate device includes a lifting device comprising a first connecting rod frame, the two ends of which are respectively hinged to the bracket and the piston rod of the hydraulic cylinder, the cylinder body of the hydraulic cylinder being hinged to the bracket, and the first connecting rod frame being connected to the tailgate device.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the high and low voltage system of a tailgate device according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 A control valve control process diagram of a high and low pressure system for a tailgate device is shown.

[0021] Figure 3 for Figure 1 The diagram shows a structural schematic of a high and low voltage system for a tailgate device;

[0022] Figure 4 for Figure 3A schematic diagram of the high and low pressure system of a tailgate device from another perspective is shown.

[0023] Reference numerals: 100-Lifting device, 110-Telescopic device, 120-Hydraulic device, 130-Hydraulic cylinder, 140-Hydraulic motor, 150-Hydraulic pump, 160-Main pipeline, 170-First pressure pipeline, 180-Second pressure pipeline, 190-Two-position three-way valve, 200-First return oil pipeline, 210-Second return oil pipeline, 220-First two-position two-way valve, 230-First relief valve, 240 - Second two-way valve, 250-Third return oil pipeline, 260-First connecting pipe, 270-Second connecting pipe, 280-Three-position four-way valve, 290-One-way speed control valve, 300-One-way valve, 310-Fourth return oil pipeline, 320-Second relief valve, 330-Gear, 340-Rack, 350-Filter, 360-First connecting rod bracket, 370-Throttle valve, 380-Bracket, 390-Tailplate device. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The high and low pressure system of a tailgate device according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0029] Reference Figure 1 The present invention aims to provide an embodiment of a high and low pressure system for a tailgate device.

[0030] A high and low pressure system for a tailgate device 390 according to an embodiment of this utility model includes a lifting device 100 and a telescopic device 110 connected to each other, and a hydraulic device 120 for providing hydraulic power to the lifting device 100 and the telescopic device 110. The lifting device 100 is used to drive the tailgate device 390 to rise and fall, and the telescopic device 110 is used to drive the lifting device 100 to retract into or extend out of the bottom of the vehicle body. The lifting device 100 includes a hydraulic cylinder 130, the telescopic device 110 includes a linear motion component and a hydraulic motor 140 that drives the linear motion component, and the hydraulic device 120 includes a hydraulic pump 150, an oil supply line and a return line connected to the hydraulic pump 150, and the hydraulic pump 150 is connected to... There is a main pipeline 160, and the oil supply circuit includes a first pressure pipeline 170 and a second pressure pipeline 180. The first pressure pipeline 170 is used to supply hydraulic oil to the hydraulic cylinder 130, and the second pressure pipeline 180 is used to supply hydraulic oil to the hydraulic motor 140. A two-position three-way valve 190 is connected between the main pipeline 160, the first pressure pipeline 170 and the second pressure pipeline 180. The return oil circuit includes a first return oil pipeline 200 and a second return oil pipeline 210 connected to the main pipeline 160. The first return oil pipeline 200 has a first two-position two-way valve 220 and a first relief valve 230 arranged sequentially along the hydraulic oil flow direction. The second return oil pipeline 210 has a second two-position two-way valve 240.

[0031] In some embodiments of this utility model, the hydraulic device 120 further includes a third return oil pipe 250, the hydraulic motor 140 is a bidirectional hydraulic motor 140, the bidirectional hydraulic motor 140 has a first connecting pipe 260 and a second connecting pipe 270, and a three-position four-way valve 280 is connected between the second pressure pipe 180, the third return oil pipe 250, the first connecting pipe 260 and the second connecting pipe 270.

[0032] Understandably, the bidirectional hydraulic motor 140 supports bidirectional oil flow, and combined with the three-position four-way valve 280 to precisely control the direction of the oil circuit, the bidirectional hydraulic motor 140 can rotate in both directions, thus meeting the working requirements of the telescopic device 110.

[0033] In some embodiments of this utility model, the linear motion component includes a gear 330 and a rack 340 that mesh with each other, a hydraulic motor 140 is connected to the gear 330 for transmission, and the rack 340 is connected to the lifting device 100 through a bracket 380.

[0034] Understandably, the hydraulic motor 140 drives the gear 330 to rotate, and the gear 330 meshes with the rack 340, causing the rack 340 to drive the tailgate device 390 to move linearly, so that the tailgate device retracts into or extends out of the bottom of the vehicle. Thus, the gear 330 and rack 340 transmission structure is compact and has high transmission efficiency, making it suitable for installation in the narrow space under the vehicle.

[0035] In some embodiments of this utility model, two hydraulic cylinders 130 are provided, and the first pressure pipe 170 has a first branch pipe and a second branch pipe. The two hydraulic cylinders 130 are respectively connected to the first branch pipe and the second branch pipe.

[0036] Understandably, the tail plate device 390 is supported by two hydraulic cylinders 130 to prevent unilateral overload and improve the smoothness and synchronicity of the lifting action.

[0037] In some embodiments of this utility model, the lifting device 100 includes a first linkage frame 360. The two ends of the first linkage frame 360 ​​are respectively hinged to the support 380 and the piston rod of the hydraulic cylinder 130. The cylinder body of the hydraulic cylinder 130 is hinged to the support 380. The first linkage frame 360 ​​is connected to the tail plate assembly. Thus, the hydraulic cylinder 130 drives the first linkage frame 360 ​​to swing up and down, so that the lifting device 100 moves up and down, improving the load-bearing capacity and stability of the lifting device 100, which is especially suitable for loading and unloading heavy goods.

[0038] In some embodiments of this utility model, the first pressure pipeline 170 is provided with a one-way speed regulating valve 290.

[0039] Understandably, the one-way speed control valve 290 precisely regulates the hydraulic oil flow and controls the lifting speed of the tailgate to avoid mechanical impact or cargo shaking caused by excessive speed.

[0040] In some embodiments of this utility model, the main pipeline 160 has a check valve 300, which is used to prevent hydraulic oil from flowing back into the hydraulic pump 150.

[0041] Understandably, the one-way valve 300 blocks the backflow of oil, maintains stable system pressure, and avoids delays or failures caused by pressure fluctuations.

[0042] In some embodiments of this utility model, the main pipeline 160 has a throttle valve 370, and the throttle valve 370 and the check valve 300 are arranged sequentially along the hydraulic oil flow direction.

[0043] Understandably, the throttle valve 370 precisely controls the oil flow, optimizes the power output efficiency in high-pressure mode, and avoids energy waste. In addition, the throttle valve 370 works in conjunction with the check valve 300 to further improve the system response speed and pressure stability.

[0044] In some embodiments of this utility model, the main pipeline 160 has a fourth return oil pipeline 310, and the fourth return oil pipeline 310 is provided with a second overflow valve 320.

[0045] Understandably, the second relief valve 320 automatically releases excess pressure when the system is overpressured to prevent damage to hydraulic components from overload.

[0046] In some embodiments of this utility model, a filter 350 is provided at the oil inlet end of the hydraulic pump 150, and the filter 350 is used to filter the hydraulic oil.

[0047] Understandably, the Filter 350 removes impurities from the hydraulic oil, preventing particulate matter from wearing down the pump body or clogging valves, thus improving system reliability.

[0048] In summary, the working principle of a high and low voltage system for a tailgate device 390, combined with... Figure 1 and Figure 2 ,as follows:

[0049] The hydraulic pump 150 generates high-pressure hydraulic oil, which is transported through the main pipeline 160. The main pipeline 160 uses a two-position three-way valve 190 to switch the transport position, so that the high-pressure hydraulic oil in the main pipeline 160 can be transported to the first pressure pipeline 170. When the tail plate is under load, the high-pressure hydraulic oil can be transported to the hydraulic cylinder 130. The hydraulic cylinder 130 drives the tail plate to rise under high pressure, which meets the power requirements of heavy-duty operation.

[0050] In addition, the first two-position two-way valve 220 can change the on / off state of the first return oil pipe 200. When the tailgate is retracted or extended from the bottom of the car body, the first return oil pipe 200 is open, and the hydraulic oil in the main pipe 160 passes through the first return oil pipe 200 and the first throttle valve 370, reducing the pressure of the hydraulic oil in the main pipe 160, so that the tailgate device 390 can be raised and lowered to a certain height under low pressure. At the same time, the main pipe 160 uses the two-position three-way valve 190 to switch the delivery position, so that the low-pressure hydraulic oil in the main pipe 160 can be connected to the second pressure pipe 180, so that the hydraulic motor 140 works under low pressure, and the tailgate device 390 is retracted or extended from the bottom of the car body, avoiding the car body from being subjected to large hydraulic shock forces.

[0051] In addition, the second two-position two-way valve 240 can change the on and off state of the second return oil pipe 210. When the tail plate device 390 is descending under no-load, the second return oil pipe 210 is open, and the hydraulic oil of the main pipe 160 passes through the second return oil pipe 210, and the hydraulic cylinder 130 is depressurized, so that the tail plate device 390 can be lowered to the ground, reducing energy consumption.

[0052] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A high-low pressure system for a tailgate apparatus, comprising: The hydraulic device (120) comprises a hydraulic pump (150), an oil supply path and an oil return path connected with the hydraulic pump (150), a main pipeline (160) connected with the hydraulic pump (150), a first pressure pipeline (170) and a second pressure pipeline (180), the first pressure pipeline (170) is used for supplying hydraulic oil to the hydraulic cylinder (130), the second pressure pipeline (180) is used for supplying hydraulic oil to the hydraulic motor (140), a two-position three-way valve (190) is connected between the main pipeline (160), the first pressure pipeline (170) and the second pressure pipeline (180), the oil return path comprises a first oil return pipeline (200) and a second oil return pipeline (210) connected with the main pipeline (160), the first oil return pipeline (200) is provided with a first two-position two-way valve (220) and a first overflow valve (230) arranged in sequence along the hydraulic oil flow direction, and the second oil return pipeline (210) is provided with a second two-position two-way valve (240).

2. The high-low pressure system of a tailgate apparatus of claim 1, wherein, The hydraulic device (120) further comprises a third oil return pipeline (250), and the hydraulic motor (140) is a bidirectional hydraulic motor (140) provided with a first connecting pipeline (260) and a second connecting pipeline (270), and a three-position four-way valve (280) is connected between the second pressure pipeline (180), the third oil return pipeline (250), the first connecting pipeline (260) and the second connecting pipeline (270).

3. The high-low pressure system for a tailgate assembly of claim 1, wherein, The hydraulic cylinder (130) is provided with two hydraulic cylinders (130), the first pressure pipeline (170) is provided with a first branch pipeline and a second branch pipeline, and the two hydraulic cylinders (130) are connected with the first branch pipeline and the second branch pipeline respectively.

4. The high-low pressure system for a tailgate assembly of claim 1, wherein, The first pressure pipeline (170) is provided with a one-way speed regulating valve (290).

5. The high-low pressure system for a tailgate assembly of claim 1, wherein, The main pipeline (160) is provided with a one-way valve (300) for preventing the hydraulic oil from flowing back to the hydraulic pump (150).

6. The high-low pressure system for a tailgate assembly of claim 5, wherein, The main pipeline (160) is provided with a throttle valve (370), and the throttle valve (370) and the one-way valve (300) are arranged in sequence along the hydraulic oil flow direction.

7. The tailgate apparatus high and low pressure system of claim 1, wherein, The main pipeline (160) is provided with a fourth oil return pipeline (310) provided with a second overflow valve (320).

8. The tailgate apparatus high-low pressure system of claim 1, wherein, The oil inlet end of the hydraulic pump (150) is provided with a filter (350) for filtering the hydraulic oil.

9. The tailgate apparatus high-low pressure system of claim 1, wherein, The straight line moving assembly comprises intermeshing gear (330) and rack (340), the hydraulic motor (140) is in transmission connection with the gear (330), the rack (340) is connected with the lifting device (100) by support (380).

10. The high-low pressure system for a tailgate assembly of claim 9, wherein, The lifting device (100) comprises first connecting rod support (360), both ends of the first connecting rod support (360) are respectively hinged with the support (380) and the piston rod of the hydraulic cylinder (130), the cylinder body of the hydraulic cylinder (130) is hinged with the support (380), and the first connecting rod support (360) is connected with the tail plate device (390).

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