Electromechanical brake booster

Patent metadata

Field	Value
Publication number	US-9139186-B2
Application number	US-200913203239-A
Country	US
Kind code	B2
Filing date	Dec 28, 2009
Priority date	Feb 25, 2009
Publication date	Sep 22, 2015
Grant date	Sep 22, 2015

Abstract

An electromechanical brake booster is disclosed. The brake booster is constructed with two worm gears which run in opposite directions and whose axial forces compensate one another. The worm gears drive toothed rack gears which convert a rotational driving movement into a translatory output movement for activating a master brake cylinder. As a result of the provision of two gear paths, the loading of each gear path is halved and an application of force to a booster body, which forms a gear output, is symmetrical.

First claim

The invention claimed is:

1. An electromechanical brake booster, having:
an electric motor; and
a gear mechanism which is driven by the electric motor and which has:
a rotational/translational conversion gear mechanism which converts a rotational drive movement of the electric motor into a translational output movement in order to activate a hydraulic master brake cylinder, and
a distributor gear mechanism which distributes a gear mechanism input between at least two gear mechanism paths, the distributor gear mechanism having at least two worm gear mechanisms with a common worm drive, wherein the worm gear mechanisms are parts of the gear mechanism paths,
wherein the rotational/translational conversion gear mechanism further acts as a combination gear mechanism which combines the at least two gear mechanism paths into one gear mechanism output.

2. The electromechanical brake booster as claimed in claim 1 , wherein the gear mechanism paths transmit the same load.

3. The electromechanical brake booster as claimed in claim 1 , wherein the combination gear mechanism acts on the gear mechanism output symmetrically.

4. The electromechanical brake booster as claimed in claim 1 , wherein the gear mechanism has multiple stages.

5. The electromechanical brake booster as claimed in claim 1 , wherein the gear mechanism has a changing transmission ratio.

6. The electromechanical brake booster as claimed in claim 1 , wherein the worm gears run in opposite directions.

7. The electromechanical brake booster as claimed in claim 1 , wherein the combination gear mechanism has two toothed gear mechanisms whose toothed racks form a common gear mechanism output.

8. An electromechanical brake booster, comprising:
an electric motor; and
a gear mechanism which is driven by a rotational drive movement of the electric motor and which has:
a distributor gear mechanism which distributes a gear mechanism input between at least two gear mechanism paths, wherein the gear mechanism paths are the same; and
a combination gear mechanism which combines the at least two gear mechanism paths into one gear mechanism output, wherein the one gear mechanism output is a translational output movement configured to activate a hydraulic master brake cylinder.

9. The electromechanical brake booster as claimed in claim 8 , wherein the combination gear mechanism acts on the gear mechanism output symmetrically.

10. The electromechanical brake booster as claimed in claim 8 , wherein the gear mechanism has multiple stages.

11. The electromechanical brake booster as claimed in claim 8 , wherein the gear mechanism has a transmission ratio between the gear mechanism input and the gear mechanism output that changes along with the rotational drive movement of the electric motor.

12. The electromechanical brake booster as claimed in claim 8 , wherein the distributor gear mechanism has two worm gear mechanisms with a common worm drive, wherein the worm gear mechanisms are parts of two gear mechanism paths.

13. The electromechanical brake booster as claimed in claim 12 , wherein the worm gears run in opposite directions.

14. The electromechanical brake booster as claimed in claim 8 , wherein the combination gear mechanism has two toothed gear mechanisms whose toothed racks together form the one gear mechanism output.

15. An electromechanical brake booster, having:
an electric motor; and
a gear mechanism which is driven by the electric motor and which has:
a rotational/translational conversion gear mechanism which converts a rotational drive movement of the electric motor into a translational output movement in order to activate a hydraulic master brake cylinder, and
a distributor gear mechanism which distributes a gear mechanism input between at least two gear mechanism paths,
wherein the rotational/translational conversion gear mechanism further acts as a combination gear mechanism which combines the at least two gear mechanism paths into one gear mechanism output, and

wherein the gear mechanism is configured to have a gear ratio between the gear mechanism input and the gear mechanism output that changes along with the rotational drive movement of the electric motor; and
wherein the distributor gear mechanism has at least two worm gear mechanisms with a common worm drive, wherein the worm gear mechanisms are parts of the at least two gear mechanism paths.

16. The electromechanical brake booster as claimed in claim 15 , wherein the at least two gear mechanism paths transmit the same load.

17. The electromechanical brake booster as claimed in claim 15 , wherein the combination gear mechanism acts on the gear mechanism output symmetrically.

18. The electromechanical brake booster as claimed in claim 15 , wherein the gear mechanism has multiple stages.

19. The electromechanical brake booster as claimed in claim 15 , wherein the worm gears run in opposite directions.

20. The electromechanical brake booster as claimed in claim 15 , wherein the combination gear mechanism has two toothed gear mechanisms whose toothed racks together form the one gear mechanism output.

21. An electromechanical brake booster configured to transmit a muscular force by a vehicle driver and a boosted force by a brake booster, as operating forces, to a piston of a hydraulic master brake cylinder, the electromechanical brake booster comprising:
an electric motor;
a first and second distributor gear that are configured to distribute a gear input between at least two gear paths;
a rotational/translational conversion gear mechanism that is configured to convert a rotational drive movement of the electric motor into a translational output movement in order to activate the hydraulic master brake cylinder;
the rotational/translational conversion gear mechanism including a first and second combination gear that are configured to combine the at least two gear paths into one gear output;
wherein the first and second distributor gears are worm gears driven via a common worm drive, wherein the worm gears are respectively parts of two gear mechanism paths.

22. The electromechanical brake booster as claimed in claim 21 , wherein the at least two gear mechanism paths transmit the same load.

23. The electromechanical brake booster as claimed in claim 21 , wherein the first and second combination gears act on the gear output symmetrically.

24. The electromechanical brake booster as claimed in claim 21 , wherein the worm gears run in opposite directions.

25. The electromechanical brake booster as claimed in claim 21 , wherein the first and second combination gears are configured to engage two toothed gear mechanisms whose toothed racks together form the one gear output.

26. The electromechanical brake booster as claimed in claim 21 , wherein a gear ratio between the gear input and the gear output changes along with the rotational drive movement of the electric motor.

27. An electromechanical brake booster, comprising:
an electric motor; and
a gear mechanism which is driven by the electric motor and which includes:
a rotational/translational conversion gear mechanism which converts a rotational drive movement of the electric motor into a translational output movement in order to activate a hydraulic master brake cylinder, and
a distributor gear mechanism which distributes a gear mechanism input between at least two gear mechanism paths, wherein the at least

Assignees

• Vollert Herbert
• Garnier Remy
• Weiberle Reinhard
• Jahnz Timo
• Kolarsky Jens
• Hoenle Stephan
• Bosch Gmbh Robert

Inventors

• Vollert Herbert
• Garnier Remy
• Weiberle Reinhard
• Jahnz Timo
• Kolarsky Jens
• Hoenle Stephan

Classifications

• F16H1/16

  comprising worm and worm-wheel · CPC title

• F16H19/04

  comprising a rack · CPC title

• F16H2035/003

  Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears · CPC title

• B60T13/745 Primary

  acting on a hydraulic system, e.g. a master cylinder · CPC title

• F16H19/00

  Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion (with intermittently-driving members F16H27/00 - F16H31/00) · CPC title