Transmission having torque measurement device

Patent metadata

Field	Value
Publication number	US-11079015-B2
Application number	US-201716320274-A
Country	US
Kind code	B2
Filing date	Sep 12, 2017
Priority date	Sep 29, 2016
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

The invention relates to a transmission for a drive train of a motor vehicle, having a shaft section, to which a torque measurement device, designed to measure a torque applied to the shaft section is attached, wherein an electronics unit connected to the torque measurement device is received radially within the shaft section. The invention further relates to a drive train for a motor vehicle, having a transmission.

First claim

The invention claimed is:

1. A transmission for a drivetrain of a motor vehicle, the transmission comprising:
a shaft section;
a torque measurement device mounted on the shaft section, the torque measurement device being configured to measure a torque applied to said shaft section; and
an electronics unit connected to the torque measurement device that is housed radially inside the shaft section,
wherein the transmission is a continuously variable transmission and further comprises a drive plate pair and a driven plate pair, and an endless traction mechanism that actively interconnects the drive plate pair and the driven plate pair, and the shaft section is locked in rotation with one of the plates of the drive plate pair.

2. The transmission according to claim 1 , wherein the electronics unit is mounted on a radial inner circumferential surface of the shaft section.

3. The transmission according to claim 1 , wherein the torque measurement device is mounted on a radial outer side of the shaft section and is connected electrically to the electronics unit.

4. The transmission according to claim 1 , wherein the torque measurement device includes a strain measurement layer.

5. The transmission according to claim 1 , wherein the shaft section is a tubular component that is locked in rotation with a gear shaft.

6. The transmission according to claim 1 , wherein the shaft section is tubular and has a first tooth section that engages locked in rotation with first mating teeth on one of the plates.

7. The transmission according to claim 1 , further comprising a data transmission unit arranged between a housing of the transmission and the shaft section that can rotate relative to the housing and is connected to the electronics unit.

8. A transmission for a drivetrain of a motor vehicle, the transmission comprising:
a shaft section;
a torque measurement device mounted on the shaft section, the torque measurement device being configured to measure a torque applied to said shaft section;
an electronics unit connected to the torque measurement device that is housed radially inside the shaft section; and
a data transmission unit arranged between a housing of the transmission and the shaft section that can rotate relative to the housing and is connected to the electronics unit,
wherein the data transmission unit comprises a bearing configured for transmitting data.

9. A drivetrain for a motor vehicle comprising the transmission according to claim 1 .

10. The transmission according to claim 1 , wherein the electronics unit includes evaluation electronics configured to convert a measurement signal detected by the torque measurement device and corresponding to a torque applied to the shaft section into a data transmission signal that is adapted to be transmitted.

11. The transmission according to claim 6 , wherein the shaft section includes a second tooth section that engages locked in rotation with second mating teeth on a gear shaft of the transmission.

12. A continuously variable transmission for a drivetrain of a motor vehicle, the transmission comprising:
a shaft section;
a torque sensor mounted on the shaft section, the torque sensor being configured to measure a torque applied to said shaft section; and
an electronics unit housed radially inside the shaft section and that receives a signal from the torque sensor and is adapted to output a data transmission signal that represents a measured torque.

13. The continuously variable transmission of claim 12 , further comprising a drive plate pair, a driven plate pair, and an endless traction mechanism that actively interconnects the drive plate pair and the driven plate pair, and the shaft section is locked in rotation with one of the plates of the drive plate pair.

14. The continuously variable transmission of claim 12 , wherein the electronics unit is mounted on a radial inner circumferential surface of the shaft section.

15. The continuously variable transmission of claim 12 , wherein the torque sensor is mounted on a radial outer side of the shaft section and is connected electrically to the electronics unit.

16. The continuously variable transmission of claim 12 , further comprising a data transmission unit arranged between a housing of the transmission and the shaft section that can rotate relative to the housing and is connected to the electronics unit.

17. The continuously variable transmission of claim 16 , wherein the data transmission unit comprises a bearing configured for transmitting data.

Assignees

• Schaeffler Technologies Ag

Inventors

• Walter Bernhard
• Kopfler Sebastian
• Stehr Reinhard

Classifications

• F16H61/662

  with endless flexible members · CPC title

• F16H2059/147

  Transmission input torque, e.g. measured or estimated engine torque · CPC title

• F16H59/14 Primary

  Inputs being a function of torque or torque demand · CPC title

• F16H61/0006

  Electronic control units for transmission control, e.g. connectors, casings or circuit boards · CPC title

• F16H9/18

  only one flange of each pulley being adjustable · CPC title