Reverse dragging torque braking system, hydraulic system and transport vehicle

Abstract

The utility model provides a reverse dragging torque braking system, a hydraulic system and a transport vehicle, and relates to the hydraulic technical field, the reverse dragging torque braking system comprises an engine, a driving pump, a reverse dragging pump, a proportional overflow valve, a heat dissipation device and a hydraulic motor, the engine is in driving connection with the driving pump, and an oil outlet of the driving pump is communicated with an oil inlet of the hydraulic motor; an oil inlet of the driving pump is communicated with an oil outlet of the hydraulic motor, the hydraulic motor is used for being in driving connection with wheels, the reverse dragging pump is in driving connection with the driving pump, an oil outlet of the reverse dragging pump is communicated with an oil inlet of the proportional overflow valve, and an oil outlet of the proportional overflow valve is communicated with the heat dissipation device. Through the heat dissipation device, the temperature of high-pressure oil can be reduced, the temperature of a hydraulic system is reduced, the hydraulic system achieves heat balance, the situation that the hydraulic system cannot work normally due to the fact that the temperature of the hydraulic system is too high is avoided, and safe and stable operation of the whole system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulics, and in particular to an anti-drag torque braking system, a hydraulic system and a transport vehicle. Background Art

[0002] Large-tonnage box girder transport vehicles can transport building materials for tunnels, bridges, and railway construction. Due to the large number of mountains in the southwest region, when transport vehicles need to make emergency brakes or slow down on slopes, the slopes have high requirements on the braking system of the transport vehicles. Transport vehicles often use engine reverse braking, but the existing engine reverse braking will cause the hydraulic system to heat up and fail during long-term braking, and the engine traction reverse braking force is insufficient, resulting in the vehicle running away, and the braking effect is not good. Utility Model Content

[0003] The problem to be solved by the utility model is how to improve the braking safety of the transport vehicle.

[0004] To this end, the utility model provides an anti-drag torque braking system, including an engine, a driving pump, an anti-drag pump, a proportional relief valve, a heat dissipation device, and a hydraulic motor, wherein the engine is drivingly connected to the driving pump, the oil outlet of the driving pump is communicated with the oil inlet of the hydraulic motor, the oil inlet of the driving pump is communicated with the oil outlet of the hydraulic motor, the hydraulic motor is used to be drivingly connected to the wheels, the anti-drag pump is drivingly connected to the driving pump, the oil outlet of the anti-drag pump is communicated with the oil inlet of the proportional relief valve, and the oil outlet of the proportional relief valve is communicated with the heat dissipation device.

[0005] Optionally, the anti-drag torque braking system further includes an oil tank, which provides hydraulic oil to the driving pump and the anti-drag pump.

[0006] Optionally, the heat dissipation device includes a control valve and a radiator, the oil inlet of the control valve is connected to the oil outlet of the proportional relief valve, the oil outlet of the control valve is connected to the oil tank, and the control valve is used to control the opening and closing of the radiator.

[0007] Optionally, the heat sink is a fan.

[0008] Optionally, the anti-drag torque braking system further includes a controller, and the controller is used to adjust the fan speed and the pressure value of the proportional relief valve.

[0009] Optionally, the anti-drag torque braking system also includes an oil pipe, and the oil outlet of the drive pump and the oil inlet of the hydraulic motor, the oil inlet of the drive pump and the oil outlet of the hydraulic motor, the oil outlet of the anti-drag pump and the oil inlet of the proportional relief valve, and the oil outlet of the proportional relief valve and the heat dissipation device are all connected through the oil pipe.

[0010] Optionally, the output shaft of the engine and the output shaft of the driving pump are gear-connected.

[0011] Optionally, the output shaft of the back-drag pump is gear-connected to the output shaft of the driving pump.

[0012] Compared with the prior art, the beneficial effects of the anti-drag torque braking system of the utility model are:

[0013] The utility model provides an engine, which can drive a driving pump to work, and hydraulic oil flows from the oil outlet of the driving pump to the hydraulic motor to drive the hydraulic motor to work, and the hydraulic motor drives the wheels to rotate, and the hydraulic oil flows back from the oil outlet of the hydraulic motor to the driving pump, and a back-dragging pump and a proportional relief valve are provided, and the proportional relief valve provides a braking torque to the back-dragging pump, and the back-dragging pump is connected to the driving pump, and the hydraulic oil passes through the back-dragging pump and flows from the oil outlet of the back-dragging pump to the proportional relief valve. This section of the oil circuit is different from the oil circuit between the driving pump and the hydraulic motor and exists independently. When the transport vehicle brakes or decelerates on a slope, the wheels have a tendency to reverse under the action of gravity and angle, and the torque generated at the wheels by the inertia force, the sliding force, etc. of the transport vehicle acts on the hydraulic motor, and the proportional overflow The valve can adjust the pressure value according to the weight of the vehicle body and the slope angle, and then adjust the braking torque of the anti-drag pump to the driving pump. The anti-drag pump and the engine jointly provide braking torque to the driving pump, so that the driving pump drives the hydraulic motor to rotate to offset the sliding torque of the wheel and keep the transport vehicle in a stable state. A heat sink is connected to the oil outlet of the proportional relief valve. The hydraulic oil flows between the proportional relief valve and the anti-drag pump to generate heat, which increases the overall temperature of the hydraulic system. The high-pressure hydraulic oil flows from the oil outlet of the proportional relief valve to the heat sink. The heat sink can reduce the temperature of the high-pressure oil, reduce the temperature of the hydraulic system, and make the hydraulic system reach thermal balance, so as to avoid the situation where the hydraulic system cannot work normally due to excessive temperature of the hydraulic system, thereby ensuring the safe and stable operation of the entire system.

[0014] In addition, in order to solve the above problems, the present invention also provides a hydraulic system, including the above anti-drag torque braking system.

[0015] Compared with the prior art, the technical effect of the hydraulic system provided by the present invention is substantially the same as the technical effect of the above-mentioned anti-drag torque braking system, which will not be described in detail here.

[0016] In addition, in order to solve the above-mentioned problem, the present invention also provides a transport vehicle, comprising the above-mentioned hydraulic system.

[0017] Compared with the prior art, the technical effect of the transport vehicle provided by the present invention is substantially the same as the technical effect of the above-mentioned hydraulic system, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic structural diagram of the anti-drag torque braking system described in an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1-engine; 2-driving pump; 3-reverse drag pump; 4-proportional relief valve; 5-heat dissipation device; 51-control valve; 52-fan; 6-hydraulic motor; 7-wheel. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] It should be noted that, in the description of the present invention, the directions or positional relationships indicated by “upper”, “lower”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as limiting the scope of protection of the present invention.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0024] Moreover, although the present invention is described with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features herein may be combined in a manner not described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

[0025] To solve the above problems, Figure 1As shown, the utility model provides an anti-drag torque braking system, including an engine 1, a driving pump 2, an anti-drag pump 3, a proportional relief valve 4, a heat dissipation device 5, and a hydraulic motor 6. The engine 1 is drivingly connected to the driving pump 2, the oil outlet of the driving pump 2 is communicated with the oil inlet of the hydraulic motor 6, the oil inlet of the driving pump 2 is communicated with the oil outlet of the hydraulic motor 6, the hydraulic motor 6 is used to be drivingly connected to the wheel 7, the anti-drag pump 3 is drivingly connected to the driving pump 2, the oil outlet of the anti-drag pump 3 is communicated with the oil inlet of the proportional relief valve 4, and the oil outlet of the proportional relief valve 4 is communicated with the heat dissipation device 5.

[0026] In this embodiment, by setting the engine 1, the engine 1 can drive the driving pump 2 to work, the hydraulic oil flows from the oil outlet of the driving pump 2 to the hydraulic motor 6, driving the hydraulic motor 6 to work, the hydraulic motor 6 drives the wheel 7 to rotate, and the hydraulic oil flows back from the oil outlet of the hydraulic motor 6 to the driving pump 2, and the back-drag pump 3 and the proportional relief valve 4 are set, the proportional relief valve 4 provides a braking torque to the back-drag pump 3, the back-drag pump 3 is connected to the driving pump 2, and the hydraulic oil passes through the back-drag pump 3 and flows from the oil outlet of the back-drag pump 3 to the proportional relief valve 4. This section of the oil circuit is different from the oil circuit between the driving pump 2 and the hydraulic motor 6 and exists independently. When the transport vehicle brakes or decelerates on a slope, the wheel 7 has a tendency to reverse under the action of gravity and angle, and the torque generated at the wheel 7 by the inertia force, sliding force, etc. of the transport vehicle acts on the hydraulic motor 6. The proportional relief valve 4 can adjust the pressure value according to the weight of the vehicle body and the slope angle, and then adjust the braking torque of the anti-drag pump 3 to the driving pump 2. The anti-drag pump 3 and the engine 1 jointly provide braking torque to the driving pump 2, so that the driving pump 2 drives the hydraulic motor 6 to rotate to offset the sliding torque of the wheel 7, so that the transport vehicle is in a stable state. The heat sink 5 is connected to the oil outlet of the proportional relief valve 4. The hydraulic oil flows between the proportional relief valve 4 and the anti-drag pump 3 to generate heat, so that the overall temperature of the hydraulic system increases. The high-pressure hydraulic oil flows from the oil outlet of the proportional relief valve 4 to the heat sink 5. The heat sink 5 can reduce the temperature of the high-pressure oil, reduce the temperature of the hydraulic system, and make the hydraulic system reach thermal balance, so as to avoid the situation where the hydraulic system cannot work normally due to excessive temperature of the hydraulic system, and ensure the safe and stable operation of the entire system.

[0027] Optionally, the anti-drag torque braking system further includes an oil tank, which provides hydraulic oil to the driving pump 2 and the anti-drag pump 3 .

[0028] In this embodiment, an oil tank is provided, which can provide hydraulic oil for the driving pump 2 and the back-drag pump 3, and the hydraulic oil cooled by the heat dissipation device 5 can also return to the oil tank, completing the overall circulation of the hydraulic oil.

[0029] Alternatively, if Figure 1As shown, the heat dissipation device 5 includes a control valve 51 and a radiator. The oil inlet of the control valve 51 is connected to the oil outlet of the proportional relief valve 4, and the oil outlet of the control valve 51 is connected to the oil tank. The control valve 51 is used to control the opening and closing of the radiator.

[0030] In this embodiment, by setting a control valve 51 and a radiator, the oil inlet of the control valve 51 is connected to the oil outlet of the proportional relief valve 4, the oil outlet of the control valve 51 is connected to the oil tank, and the control valve 51 is electrically connected to the radiator. The control valve 51 can control the opening and closing of the radiator, control the operation of the radiator, cool the hydraulic oil, and achieve the purpose of heat dissipation.

[0031] Alternatively, if Figure 1 As shown, the heat sink is a fan 52 .

[0032] In this embodiment, by configuring the radiator as the fan 52, the fan 52 has a simple structure and is easy to install. The fan 52 is a mechanical structure and is easy to inspect and replace.

[0033] Optionally, the anti-drag torque braking system further includes a controller, and the controller is used to adjust the rotation speed of the fan 52 and the pressure value of the proportional relief valve 4.

[0034] In this embodiment, by setting a controller, the controller can adjust the speed of the fan 52, and by changing the cooling speed of the hydraulic oil, the anti-drag torque braking system can work more stably. The controller can also adjust the pressure value of the proportional relief valve 4 according to the weight of the transport vehicle and the ramp angle, so that the torque provided by the anti-drag pump 3 and the engine 1 can offset the torque of the wheel 7 reversal, thereby improving the applicability of the anti-drag torque braking system and improving the stability and safety of the anti-drag torque braking system.

[0035] Optionally, the anti-drag torque braking system also includes an oil pipe, and the oil outlet of the drive pump 2 and the oil inlet of the hydraulic motor 6, the oil inlet of the drive pump 2 and the oil outlet of the hydraulic motor 6, the oil outlet of the anti-drag pump 3 and the oil inlet of the proportional relief valve 4, and the oil outlet of the proportional relief valve 4 and the heat dissipation device 5 are all connected through the oil pipe.

[0036] In this embodiment, an oil pipeline is provided to connect the driving pump 2 and the hydraulic motor 6, as well as the back-drag pump 3 and the proportional relief valve 4, the heat dissipation device 5, and the oil tank, so as to facilitate the transmission of hydraulic oil of the back-drag torque braking system.

[0037] Optionally, the output shaft of the engine 1 and the output shaft of the driving pump 2 are gear-connected.

[0038] In this embodiment, the output shaft of the engine 1 is connected to the output shaft of the driving pump 2 through gear transmission. The mechanical transmission structure is stable, which facilitates the engine 1 to drive the driving pump 2 to work.

[0039] Optionally, the output shaft of the back-drag pump 3 is gear-connected to the output shaft of the driving pump 2 .

[0040] In this embodiment, the output shaft of the back-drag pump 3 is connected to the output shaft of the driving pump 2 through gear transmission. The mechanical transmission structure is stable, which facilitates the back-drag pump 3 to provide braking torque for the driving pump 2.

[0041] Specifically, the output shaft of the back-drag pump 3 and the output shaft of the engine 1 are both connected to the output shaft of the driving pump 2 through gear transmission, and the output shaft of the back-drag pump 3 and the output shaft of the engine 1 will not interfere with each other.

[0042] A hydraulic system according to another embodiment of the present invention includes the above-mentioned anti-drag torque braking system.

[0043] Compared with the prior art, the beneficial effects of the hydraulic system of this embodiment are substantially the same as the beneficial effects of the above-mentioned anti-drag torque braking system, and will not be described in detail here.

[0044] A transport vehicle according to another embodiment of the utility model comprises the above-mentioned hydraulic system.

[0045] Compared with the prior art, the beneficial effects of the transport vehicle of this embodiment are substantially the same as those of the above-mentioned hydraulic system, and will not be described in detail herein.

[0046] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. An anti-drag torque braking system, characterized in that: The invention comprises an engine (1), a driving pump (2), a back-drag pump (3), a proportional relief valve (4), a heat dissipation device (5), and a hydraulic motor (6); the engine (1) is connected to the driving pump (2) by driving means; the oil outlet of the driving pump (2) is communicated with the oil inlet of the hydraulic motor (6); the oil inlet of the driving pump (2) is communicated with the oil outlet of the hydraulic motor (6); the hydraulic motor (6) is used for connecting to the wheels (7) by driving means; the back-drag pump (3) is connected to the driving pump (2) by driving means; the oil outlet of the back-drag pump (3) is communicated with the oil inlet of the proportional relief valve (4); and the oil outlet of the proportional relief valve (4) is communicated with the heat dissipation device (5).

2. The anti-drag torque braking system according to claim 1, characterized in that: It also includes an oil tank, which provides hydraulic oil for the driving pump (2) and the back-drag pump (3).

3. The anti-drag torque braking system according to claim 2, characterized in that: The heat dissipation device (5) comprises a control valve (51) and a radiator, wherein the oil inlet of the control valve (51) is connected to the oil outlet of the proportional relief valve (4), and the oil outlet of the control valve (51) is connected to the oil tank, and the control valve (51) is used to control the opening and closing of the radiator.

4. The anti-drag torque braking system according to claim 3, characterized in that: The heat sink is a fan (52).

5. The anti-drag torque braking system according to claim 4, characterized in that: It also includes a controller, which is used to adjust the rotation speed of the fan (52) and the pressure value of the proportional relief valve (4).

6. The anti-drag torque braking system according to claim 1, characterized in that: It also includes an oil delivery pipe, through which the oil outlet of the driving pump (2) and the oil inlet of the hydraulic motor (6), the oil inlet of the driving pump (2) and the oil outlet of the hydraulic motor (6), the oil outlet of the back-drag pump (3) and the oil inlet of the proportional relief valve (4), and the oil outlet of the proportional relief valve (4) and the heat dissipation device (5) are all connected.

7. The anti-drag torque braking system according to claim 1, characterized in that: The output shaft of the engine (1) and the output shaft of the driving pump (2) are gear-connected.

8. The anti-drag torque braking system according to claim 1, characterized in that: The output shaft of the back-drag pump (3) is gear-connected to the output shaft of the drive pump (2).

9. A hydraulic system, characterized in that: The invention comprises an anti-drag torque braking system as claimed in any one of claims 1 to 8.

10. A transport vehicle, characterized in that: Comprising a hydraulic system as claimed in claim 9.

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