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Transmission of a traction drive, traction drive having the same and method for controlling the transmission

A transmission and driving device technology, applied in transmission control, transmission, fluid transmission, etc., can solve problems such as threatening vehicles, acceleration, and damage to transmissions

Active Publication Date: 2021-10-26
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the vehicle is stationary, under certain ambient conditions (wind, driving downhill) the vehicle can be accelerated undesirably when disengaging an engaged gear, which can subsequently damage the transmission and even the Threat to the vehicle, vehicle occupants and surrounding environment

Method used

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  • Transmission of a traction drive, traction drive having the same and method for controlling the transmission

Examples

Experimental program
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Embodiment Construction

[0040] according to figure 1 For example, a travel drive 1 of a mobile working machine has a transmission 3 with a drive machine 2 designed as a diesel engine, a hydrostatic transmission 4 and, in the exemplary embodiment, a two-stage transmission 6 . The hydrostatic transmission 4 has a first hydraulic machine 8 designed as an axial piston pump in a swash plate construction, which is connected via two working lines 10, 12 to a shaft in a slant shaft construction. The second hydraulic machine 14 of the piston motor is fluidly connected in a closed hydraulic circuit. The first hydraulic machine 8 has a first drive shaft 16 , which is coupled to the drive machine 2 and forms the transmission input of the transmission 3 . The second drive shaft 18 of the second hydraulic machine 14 is coupled to the input shaft 20 of the transmission 6 . The output shaft 22 of the transmission 6 is coupled to a differential 24 with shafts 26 of the two wheels 27 of the traction drive 1 . The t...

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PUM

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Abstract

The invention relates to a transmission for a traction drive, with a transmission input connectable to a drive machine and a transmission output connectable to an output. In order to transmit power between the transmission input and the transmission output, provision is made to connect the hydrostatic transmission and the transmission in series. The transmission has gear stages that can be changed at least in the stationary state of the transmission output, wherein a control device is provided via which the change of gear stages can be controlled.

Description

technical field [0001] The invention relates to a transmission, a traction drive having the transmission and a method for controlling the transmission. Background technique [0002] Laid-open document DE 10 2005 058 937 A1 shows a traction drive of this type. In this publication, on the one hand the hydrostatic transmission is coupled to the drive machine and on the other hand the downstream transmission is coupled to the output. The transmission is provided here to increase the speed range of the traction drive compared to a traction drive with a purely hydrostatic transmission. [0003] In order to be able to perform a gear change in the transmission, the transmission should be approximately unloaded when the engaged gear is disengaged. In other words, the torque acting between the hydrostatic transmission and the transmission must be approximately zero. This is ensured in the solution shown by reducing the displacement of the hydraulic motor. In this torque-free state...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/16F16H61/18F16H47/02
CPCF16H47/02F16H61/16F16H61/18F16H2061/161F16H2061/166F16H59/54F16H59/40F16H61/0213
Inventor E.伊尔克N.布里克斯
Owner ROBERT BOSCH GMBH