Hydraulic differential mechanism and vehicle
A differential mechanism and hydraulic technology, applied in vehicle components, control devices, transportation and packaging, etc., can solve the problems of tugs, reduced differential effect, increased tire wear, etc., to achieve high control accuracy, eliminate errors, and reduce tires. The effect of the degree of wear
Active Publication Date: 2016-04-06
SANY HEAVY EQUIP CO LTD
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Problems solved by technology
However, due to the manufacturing precision, installation precision, precision of the differential valve itself, and the dead zone of the differential valve, the control accuracy of the cam to the differential speed cannot meet the requirements, so that the displacement of the inner and outer pumps cannot be performed as expected. Adjustment, the effect of the differential speed is reduced
The above disadvantages mainly cause the following effects: the tire on the side with higher pump pressure provides most of the traction force, when the traction force is greater than the adhesion force, the tire is easy to slip and the tire wear is increased
The tires on the side with lower pump pressure will have weak traction or even tug due to insufficient fuel supply, which will affect normal steering
Method used
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[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.
[0020] The embodiment of the present invention provides a hydraulic differential mechanism, which is installed in the vehicle to make the speed difference between the inner and outer tires when the vehicle is turning, so as to ensure that there is no relative slippage between the inner and outer tires and the ground when the vehicle is turning, and improve the stability of the tires. service l...
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The invention provides a hydraulic differential mechanism, which includes a swing oil cylinder, a cam, and closed pipelines located on the left and right sides of the vehicle. A main pump is arranged in each closed pipeline, and each pilot valve controls the row of each main pump. Each main pump controls the speed of the tires on each side of the vehicle. The swing cylinder is connected to the cam. The two sides of the cam cooperate with the pilot valves on the left and right sides. The high-pressure oil in the closed pipeline is led to the left and right chambers of the swing cylinder through the reversing valves on the left and right sides. The hydraulic differential mechanism of the present invention introduces the oscillating oil cylinder to play a feedback control role, eliminate errors, and control the pump displacement with high precision. When turning, the pressure of the closed pipeline is kept consistent by controlling the displacement of the pump, thereby reducing tire wear. degree without affecting normal steering.
Description
technical field [0001] The invention relates to a hydraulic differential mechanism, in particular to a hydraulic differential mechanism and a vehicle thereof. Background technique [0002] When the fully hydraulically driven vehicle is turning, due to the speed difference between the inner and outer tires, the differential mechanism of the vehicle itself is mainly used to ensure that there is no relative slip between the inner and outer tires and the ground when the vehicle is turning, and the differential speed of the inner and outer tires is realized when turning. This ensures pure rolling between the tire and the ground. [0003] Although there are also vehicle differentials on the market today, the hydraulic oil circuit in the differential directly applies pressure to the cam in the differential, and the cam swings to control the displacement of the hydraulic valve plunger, so that the tire speed on both sides of the vehicle Deviation occurs. However, due to the manufa...
Claims
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IPC IPC(8): B60K17/16B60K17/10
Inventor 刘文东王冶王文学
Owner SANY HEAVY EQUIP CO LTD