Setting device, particularly a motor vehicle parking brake

Patent metadata

Field	Value
Publication number	US-10071718-B2
Application number	US-201414179906-A
Country	US
Kind code	B2
Filing date	Feb 13, 2014
Priority date	Dec 22, 2003
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A setting device, particularly a motor vehicle parking brake includes a remotely-operated drive, a hollow shaft, a spindle shaft and an elastic element. The hollow shaft is driven by the remotely-operated drive so that the hollow shaft rotates. The spindle shaft moves relative to the hollow shaft within the hollow shaft due to the rotation of the hollow shaft. The spindle shaft is connected to a brake cable such that the spindle shaft can apply and release the brake as it moves in different directions within the hollow shaft. The elastic element is loaded due to movement of the hollow shaft as the hollow shaft is driven in an attempt to release the brake while the brake cable is blocked.

First claim

The invention claimed is:

1. A setting device comprising:
a remotely-operated drive;
a hollow shaft driven by the remotely-operated drive so that the hollow shaft rotates;
a spindle shaft that moves relative to the hollow shaft within the hollow shaft due to the rotation of the hollow shaft, the spindle shaft being connected to a brake cable such that the spindle shaft can apply and release a brake as it moves in different directions within the hollow shaft; and
a first elastic element and a second elastic element;
wherein the first elastic element and the second elastic element are positioned such that, as the hollow shaft is driven by the remotely-operated drive in a direction for releasing the brake starting from a state in which the first elastic element and the second elastic element each are under load, due to movement of the hollow shaft, a load on the first elastic element can cease during the movement of the hollow shaft,
wherein the first elastic element and the second elastic element are positioned such that when the load on the first elastic element ceases, the movement of the hollow shaft has not reached the maximum spring travel of the second elastic element, whereby a load pressure on the second elastic element remains.

2. The setting device according to claim 1 , further comprising a drive gear wheel driven by rotation of the remotely-operated drive and connected to the hollow shaft such that the hollow shaft is rotated by rotation of the remotely-operated drive and such that the drive gear wheel and the hollow shaft can be moved along an axis of the hollow shaft relative to the remotely-operated drive.

3. The setting device according to claim 1 , further comprising:
a transmission between the remotely-operated drive and the hollow shaft; and
an intermediate gear wheel between a drive gear element of the remotely-operated drive and a drive gear wheel of the hollow shaft;
wherein the intermediate gear wheel and the drive gear wheel of the hollow shaft are enabled to move axially relative to each other at least to the extent of an operational stroke distance of the elastic elements.

4. The setting device according to claim 1 , further comprising a force sensor emitter which is fixed to the hollow shaft and a force sensor receiver which is stationary relative to a housing and assigned to the force sensor emitter.

5. The setting device according to claim 4 , wherein the force sensor emitter is used for determining a brake application force of a motor vehicle parking brake or for determining a brake release force of a motor vehicle parking brake or for determining both the brake application and brake release force of a motor vehicle parking brake.

6. The setting device according to claim 1 , wherein the first elastic element and the second elastic element are concentrically arranged in relation to each other.

7. The setting device according to claim 1 , wherein the first and second elastic elements concentrically surround the hollow shaft or the spindle shaft.

8. The setting device according to claim 1 , wherein the first elastic element has an elasticity constant that is different from an elasticity constant of the second elastic element.

9. The setting device according to claim 1 , wherein the first and second elastic elements are embodied as screw springs.

10. The setting device according to claim 1 , wherein the first and second elastic elements are embodied as compression spring elements.

11. The setting device according to claim 1 , wherein the setting device is for a motor vehicle parking brake.

12. The setting device according to claim 1 , wherein a stop is provided which is configured so as to prevent the movement of the hollow shaft exceeding the maximum spring travel of the second elastic element, and wherein an axial play is provided before the stop.

Assignees

• Brose Fahrzeugteile

Inventors

• Deutloff Norbert
• Kraft Ekkehard
• Roos Stephan
• Sauer Armin

Classifications

• B60T13/746 Primary

  and mechanical transmission of the braking action · CPC title

• B60T13/02

  with mechanical assistance or drive {(combined with fluid pressure B60T13/588)} · CPC title

• B60T7/107

  with electrical power assistance · CPC title

• B60T7/10 Primary

  Disposition of hand control · CPC title

• B60T13/74

  with electrical assistance or drive · CPC title