Articulated bi-directional driving vehicle full hydraulic steering system

Abstract

The invention relates to the technical field of engineering vehicles, in particular to an articulated bi-directional driving vehicle full hydraulic steering system. The existing problems of articulated bi-directional driving vehicle steering systems in the prior art are solved. The articulated bi-directional driving vehicle full hydraulic steering system comprises a front-rear driving changeover valve set, a front priority valve, a rear priority valve, a front load sensing steering gear, a rear load sensing steering gear, a front-rear steering blocking valve, a left steering oil cylinder and a right steering oil cylinder. The front-rear steering blocking valve is an air control two-position six-way reversing valve. The front load sensing steering gear and the rear load sensing steering gear have four working oil ports which are connected with four oil ports of the front-rear steering blocking valve correspondingly. According to the articulated bi-directional driving vehicle full hydraulic steering system, the air control two-position six-way reversing valve is adopted between the front load sensing steering gear and the rear load sensing steering gear of an articulated bi-directional driving vehicle, so that a real sense of blocking between front and rear steering system bodies is achieved, mutual interference between the front steering system body and the rear steering system body is avoided, and the steering performance of the whole vehicle is ensured; and the front-rear driving changeover valve set is arranged on the articulated bi-directional driving vehicle, and thus changeover of front-rear driving maneuvering is achieved.

Description

Technical field [0001] The invention belongs to the technical field of engineering vehicles, and specifically relates to an articulated bidirectional driving vehicle full hydraulic steering system. Background technique [0002] Articulated two-way driving vehicles are mainly used in places where space is limited, such as mines along the roadways and long tunnels. In these occasions, not only the steering system is required to be easy to operate and the turning radius is small, but also the steering system arranged in the front and rear cabs can be locked. Features. [0003] The prior art articulated two-way driving vehicle steering system mainly has two forms, one principle is as figure 1 As shown, when the driver operates the front steering gear 10 arranged in the front cab, the R port of the front steering gear 10 communicates with the rodless cavity of the left steering cylinder 7 and the rod cavity of the right steering cylinder 8, and the front steering gear 10 The L port con...

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Problems solved by technology

[0003] There are two main types of articulated two-way driving vehicle steering system in the prior art, one principle is as follows: figure 1 As shown, when the driver operates the front steering gear 10 arranged in the front cab, the R port of the front steering gear 10 communicates with the rodless chamber of the left steering cylinder 7 and the rod chamber of the right steering cylinder 8, and the front steering gear 10 The L port of the front steering gear 10 is connected to the rod chamber of the left steering cylinder 7 and the rodless chamber of the right steering cylinder 8 to realize the articulated steering of the vehicle. In this process, the R port and the L port of the front steering gear 10 are connected with the The L port and the R port of the rear steering gear 11 of the cab are always in a connected state. If the person sitting in the rear cab causes the rear steering gear 11 to move intentionally or unintentionally at this time, the whole vehicle will not be able to turn or turn. The phenomenon that the state cannot be controlled increases the probability of accidents; when the driver operates the rear steering gear 11, the principle is also the same

[0004] Another principle such as figure 2 As shown, if the front and rear steering gears are operated at the same time, the vehicle cannot be turned or the steering state cannot be controlled; in addition, since the oil return port T of the front steering gear 10 is connected to the oil inlet P of the rear steering gear 11 , if the vehicle is driven in the rear cab, the oil return port T of the front steering gear 10 will be in a high-pressure state for a long time, which will cause frequent damage to the front steering gear 10

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