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Transmission mechanism and its control method, travel drive with the transmission mechanism

A transmission and driver technology, applied in the direction of transmission control, transmission, components with teeth, etc., can solve the problems of transmission damage and torque, and achieve a reliable switching process

Active Publication Date: 2021-12-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of time parameterization entails the danger that, due to a technical defect, there is still always a limited displacement volume and thus a torque
If gear changes are made despite this (i.e. under load), this can lead to damage to the transmission

Method used

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  • Transmission mechanism and its control method, travel drive with the transmission mechanism
  • Transmission mechanism and its control method, travel drive with the transmission mechanism

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0063] according to figure 1 , a traction drive 1 (for example a traction drive of a mobile power machine) has a transmission mechanism 3 with a power machine 2 designed as a diesel engine, a hydraulic transmission 4 and a two-stage transmission 6 in the exemplary embodiment. The hydraulic transmission 4 has a first hydraulic machine 8 configured as an axial piston pump of swash plate structure, which is connected in fluid communication with a second hydraulic machine 14 via two working lines 10 , 12 in a closed hydraulic circuit, which The second hydraulic machine is configured as a swash plate structure axial piston engine. The first hydraulic machine 8 is coupled to the working machine 2 via a drive shaft 16 . A transmission shaft 18 of the second hydraulic machine 14 is coupled to an input shaft 20 of the transmission 6 . An output shaft 22 of the transmission 6 is coupled to a differential 24 of two axles 26 of the travel drive 1 . The two hydraulic machines 8 , 14 eac...

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PUM

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Abstract

A transmission mechanism for a travel drive, in particular a mobile working machine, is disclosed, the transmission mechanism has a first hydraulic machine and a second hydraulic machine, the first hydraulic machine can be coupled with the working machine, the second hydraulic machine has a adjusted second displacement volume, and the second hydraulic machine can be connected, in particular connected, in fluid communication with the first hydraulic machine through the first working line and the second working line of the transmission mechanism, wherein the first The transmission of the two hydraulic machines and the transmission mechanism can be coupled or coupled so that torque can be transmitted, the transmission has at least two transmission stages, and wherein the transmission mechanism has a control device, by which the second displacement The volume can be reduced to zero or close to zero at least during a changeover from one transmission stage to another. Furthermore, a travel drive with such a transmission mechanism and a method for controlling the transmission mechanism are disclosed.

Description

technical field [0001] The invention relates to a transmission mechanism, a travel drive and a method for controlling the transmission mechanism. Background technique [0002] Transmission units having a hydrostatic transmission and a mechanical transmission coupled in series are used in traction drives, for example in agricultural machines or mobile work machines. By automation, the transmission stages of the transmission of such a transmission mechanism can also be switched during travel. For this purpose, the torque between the hydraulic motor of the hydrostatic transmission and the transmission input of the transmission is reduced to zero. This is achieved by reducing the displacement volume of the hydraulic motor to zero ("zero swing"). If zero-displacement volume is achieved, the old transmission stage is swapped out and the new transmission stage is switched in by mechanical synchronization. The synchronizing ring provided for this purpose is designed in such a way...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/425F16H61/46
CPCF16H61/425F16H61/46F16H61/42F16H47/02F16H61/702F16H2059/6853F16H61/682F16H59/68
Inventor E.伊尔克N.布里克斯U.伦兹盖格
Owner ROBERT BOSCH GMBH