The invention discloses a hydraulic power-assisted steering gear rotary valve, and relates to the technical field of hydraulic power assistance. One end of a torsion bar is connected with an input shaft, the other end of the torsion bar is connected with an output shaft, and the end, close to the input shaft, of the output shaft is arranged on the periphery of the input shaft in a sleeving mode; an oil inlet hole, a first oil hole and a second oil hole are formed in the output shaft in the circumferential direction of the output shaft, the oil discharging groove is communicated with the oil inlet hole, the two sides of the oil discharging groove are communicated with the first oil hole and the second oil hole respectively, the two sides of the oil returning groove are communicated with the first oil hole and the second oil hole respectively, and the oil returning groove is used for being communicated with the oil returning cavity. And a plug is movably arranged in the through hole. When hydraulic assistance fails, hydraulic oil in the steering oil pump and the steering gear rotary valve is not in flowing circulation, an original low-pressure oil return cavity is changed into high pressure of a relative degree, the plug is pushed away in the reverse direction through the high pressure, oil way circulation is formed, and therefore hydraulic resistance is reduced, and hydraulic self-locking is eliminated.
本发明公开了液压助力转向器转阀,涉及液压助力技术领域,扭杆一端与输入轴连接,扭杆另一端与输出轴连接,输出轴靠近输入轴的一端套设在输入轴的外周,输入轴沿其周向间隔设有回油槽和排油槽,输出轴沿其周向设有进油孔、第一油孔和第二油孔,排油槽与进油孔连通,排油槽两侧分别与第一油孔和第二油孔连通,回油槽两侧分别与第一油孔和第二油孔连通,回油槽用于与回油腔连通,所述排油槽设有与回油腔连通的通孔,所述通孔内活动设有堵头。当液压助力失效时,转向油泵与转向器转阀中液压油不为一个流动的循环,原本低压回油腔变成了相对程度的高压,高压反向推开堵头,形成油路循环,从而降低液压阻力,消除液压自锁。
Rotary valve of hydraulic power-assisted steering gear
液压助力转向器转阀
2022-07-15
Patent
Electronic Resource
Chinese
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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