Caterpillar variable-speed transmission device adopting double-flow steering

Abstract

The invention discloses a caterpillar variable-speed transmission device adopting double-flow steering. The caterpillar variable-speed transmission device comprises a variable-speed transmission assembly, a differential steering assembly, a double-flow driving assembly, a left driving assembly, a reversing operating assembly and a right driving assembly which are mounted in a box assembly. The variable-speed transmission assembly and the differential steering assembly are connected, and the differential steering assembly and the double-flow driving assembly are connected. The double-flow driving assembly is connected with the left driving assembly and the right driving assembly. The left driving assembly and the right driving assembly are connected with the reversing operating assembly. HST stepless steering and mechanical multi-gear driving are adopted to constitute power double-flow input so as to achieve differential-type steering of the two sides of a track, the steering radius canbe changed continuously, and steering accuracy is high; differential power steering input is conducted under the coaxial condition, thus the left-right steering input power is the same in rotating speed and opposite in rotating direction, the structure is compact, and working is reliable; and a left shifting fork shaft and a right shifting fork shaft of the reversing operating assembly are symmetrically arranged around a supporting seat, one-lever operating switching between advancing and retreating is achieved, and operating is easy, convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of speed change transmission, in particular to a double-flow steering tracked vehicle speed change transmission device. Background technique [0002] For a tracked vehicle running on two tracks, when there is a speed difference between the left track and the right track, the tracked vehicle can turn. At present, the commonly used driving schemes include electric transmission, hydraulic transmission and mechanical transmission. Due to the high efficiency of mechanical transmission, it is widely used. In the mechanical transmission scheme, there are mainly single-flow transmission and double-flow transmission. ) tracked vehicle transmission with input power, usually two sets of planetary gear mechanisms are used to make the power input by the transmission mechanism and the power input by the steering mechanism parallel and then converge. The power input by the transmission mechanism is input by the ring gear o...

AI Technical Summary

Problems solved by technology

In the dual-flow transmission scheme, if the steering input power adopts continuously variable speed input, the steering is flexible, the steering radius can be continuously changed, the steering angular speed is proportional to the rotational speed input by the steering mechanism, the steering is precise, and the performance is superior; In the dual-flow transmission scheme, the steering operation direction of the steering operating mechanism (steering wheel or steering rod) remains unchanged (for example, for the steering wheel type steering operating mechanism, the steering wheel is biased to the left or right when moving forward and backward), Take operating the steering mechanism to the left as an example. When moving forward, operate the steering mechanism to the left. After the power is converging, the left crawler decelerates and the right crawler accelerates, and the tracked vehicle turns to the left. , the shift input power is reversed, but the direction of the steering input power remains unchanged. Although the tracked vehicle is running backwards, the deflection direction of the steering mechanism remains unchanged, so the change law between the left track and the right track remains unchanged, that is: left The side crawler decelerates relative to the forward direction, and the right crawler accelerates relative to the forward direction (ie: the left crawler accelerates and reverses, and the right crawler decelerates and reverses), and the tracked vehicle reverses to the right; Steering to the right when turning back, causing operational difficulties and even safety accidents

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