Integrated hydraulic cab tilting power unit for heavy-load truck
A technology of hydraulic power unit and cab, which is applied to the superstructure, vehicle parts, superstructure and other directions of trucks, can solve the problems of troublesome work for operators, large volume occupied space, inconvenient installation, etc., and avoid pipelines. The effect of connection leakage, light weight and easy operation
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Embodiment 1
[0030] Such as figure 1 As shown, when the electric plunger pump 3 can work normally, when the cab of the heavy-duty truck needs to be turned over, the manual reversing valve 5 is switched to the lifting position. At this time, the oil cylinder lifts the oil chamber and the oil cylinder pulls back the oil chamber. Differential form is formed: after the power is turned on, the motor runs, the electric plunger pump 3 works and outputs pressure, and the hydraulic oil passes through the electric pump outlet check valve 31 and the manual reversing valve 5 to the oil cylinder lifting oil port joint 6 and the oil cylinder pull back oil at the same time. Port joint 7, because the positions of the lifting oil chamber of the oil cylinder and the pull-back oil chamber of the oil cylinder are in the differential form, the pressure output by the electric plunger pump 3 forms a differential pressure in the two oil chambers, and the hydraulic pressure formed by the pressure difference The p...
Embodiment 2
[0032] Such as figure 1 As shown, when the electric plunger pump 3 can work normally, the cab of the heavy-duty truck needs to fall back, the manual reversing valve 5 is switched to the pull-back position, the power supply is started to supply power to the motor, and the electric plunger pump 3 works to output pressure , the hydraulic oil passes through the electric pump outlet check valve 31 and the manual reversing valve 5 to the oil cylinder pull-back oil port joint 7 to output the hydraulic power to the pull-back oil chamber of the drive cylinder, and at the same time the hydraulic oil in the lift oil chamber of the drive cylinder passes through The oil cylinder lifting oil port joint 6 and the manual reversing valve 5 are throttled by the oil return throttle valve 9 and then return to the oil tank 4 through the oil return check valve 10. At this time, the oil cylinder pulls back and the cab of the heavy-duty truck falls back;
[0033] The oil return throttle valve 9 effe...
Embodiment 3
[0037] Such as figure 1 As shown, when the electric plunger pump 3 cannot work normally, when the cab of the heavy-duty truck needs to be turned over, the manual reversing valve 5 is switched to the lifting position, the manual pump 2 is used to output the pressure, and the hydraulic oil passes through the outlet of the manual pump. The one-way valve 21 and the manual reversing valve 5 go to the oil cylinder lifting oil port joint 6 and the oil cylinder pulling back oil port joint 7 at the same time. The positions of the oil cylinder lifting oil chamber and the oil cylinder pulling back oil chamber are in differential form. The oil pressure output by the manual pump 2 forms a pressure difference in the two oil chambers, and the hydraulic power formed by the pressure difference is output to the lifting oil chamber of the oil cylinder. At this time, the oil cylinder extends, and the cab of the heavy-duty truck realizes lifting and turning.
[0038] The safety pressure valve 8 c...
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