Drive assembly

Patent metadata

Field	Value
Publication number	US-2023278661-A1
Application number	US-202318168242-A
Country	US
Kind code	A1
Filing date	Feb 13, 2023
Priority date	Mar 1, 2022
Publication date	Sep 7, 2023
Grant date	—

Abstract

A drive assembly of a vehicle operable with muscular power and/or motor power. The drive assembly including a drive unit, a frame interface, wherein the drive unit is arranged at least partially between a first wall and a second wall of the frame interface, a first bracket holding the drive unit on the first wall, and a second bracket holding the drive unit on the second wall. The first bracket comprises a first damping sleeve inserted into a first opening of the drive unit, the second bracket comprises a second damping sleeve inserted into a second opening of the drive unit, wherein each damping sleeve is screwed to the corresponding wall by means of a screw. Each damping sleeve comprises a sleeve, and a damping element which at least partially surrounds the sleeve and is formed from a vibration-damping material.

First claim

What is claimed is:

1 . A drive assembly of a vehicle operable with muscular power and/or motor power, comprising:
a drive unit; a frame interface, wherein the drive unit is arranged at least partially between a first wall and a second wall of the frame interface; a first bracket holding the drive unit on the first wall; and a second bracket holding the drive unit on the second wall; wherein the first bracket includes a first damping sleeve inserted into a first opening of the drive unit, wherein the second bracket includes a second damping sleeve inserted into a second opening of the drive unit; wherein the first damping sleeve and the second damping sleeve are screwed to the first and second wall, respectively, by a screw, and wherein each for the first damping sleeve and the second damping sleeve includes a sleeve, and a damping element at least partially surrounding the sleeve and formed from a vibration-damping material.

2 . The drive assembly according to claim 1 , wherein each damping element is formed from an elastomer.

3 . The drive assembly according to claim 1 , wherein the first bracket is configured in such a way that in a screwed state, the first damping sleeve bridges a gap between the drive unit and the first wall.

4 . The drive assembly according to claim 1 , wherein the first and second openings are configured in such a way that a press fit between the first damping sleeve and the first opening has a smaller interference than a press fit between the second damping sleeve and the second opening.

5 . The drive assembly according to claim 1 , wherein the drive unit includes, for each respective opening of the first and second openings, one protruding mounting tab in which the respective opening is arranged.

6 . The drive assembly according to claim 1 , wherein the drive unit includes a through-opening, and face ends of the through-opening form the first and second openings into which the first and second damping sleeves, are respectively inserted.

7 . The drive assembly according to claim 6 , wherein the through-opening at the second opening includes a tapering region having a smaller inner diameter than the rest of the through-opening.

8 . The drive assembly according to claim 7 , wherein the drive unit includes a two-part housing having a base region and a lid, wherein the tapering region is arranged exclusively within the lid.

9 . The drive assembly according to claim 1 , wherein the second opening includes a groove region including at least one circumferentially extending groove on an inner circumference of the second opening.

10 . The drive assembly according to claim 1 , wherein each damping element includes several circumferentially extending elevations on an outer circumference.

11 . The drive assembly according to claim 1 , wherein at least one of the sleeves includes a shank and a flange, wherein on a side facing the first or second wall, the flange includes a plurality of protruding form fit elements, and the form fit elements are configured to press into the first or second wall as a result of the first or second damping sleeve being screwed to the first or second wall.

12 . The drive assembly according to claim 11 , wherein each of the form fit elements has a pyramid or a cone protruding from a surface of the flange.

13 . The drive assembly according to claim 12 , wherein in the surface of the flange, each form fit element has a recess adjacent to the pyramid.

14 . The drive assembly according to claim 1 , wherein at least one of the sleeves includes a shank and a flange, wherein the flange has a taper at a radially outer end and on a side facing the shank, and wherein the taper is compensated by the damping element.

15 . The drive assembly according to claim 14 , wherein the drive unit includes at least one protruding annular rib arranged concentrically with one of the first or second openings, wherein the protruding annular rib and the taper of the flange of the one of the sleeves are arranged on a same radius with respect to an opening axis of the first or second opening.

16 . The drive assembly according to claim 1 , further comprising:
a friction coating arranged on a surface of the drive unit and/or on a surface of the frame interface and/or on a surface of the first damping sleeve and/or on a surface of the second damping sleeve, wherein the friction coating includes hard particles to increase friction.

17 . The drive assembly according to claim 16 , wherein the friction coating further includes a lacquer with which the hard particles are coated.

18 . The drive assembly according to claim 11 , wherein: (i) the flange of at least one of the sleeves has a thickness substantially corresponding to a wall thickness of the shank of the at least one of the sleeves, or (ii) the flange of at least one of the sleeves has a thickness corresponding to at least 1.5 times a wall thickness of the shank of the at least one of the sleeves.

19 . A vehicle operable with muscular power and/or motor power, the vehicle being an electric bicycle, the vehicle comprising:
a drive assembly
a drive unit,
a frame interface, wherein the drive unit is arranged at least partially between a first wall and a second wall of the frame interface,
a first bracket holding the drive unit on the first wall, and
a second bracket holding the drive unit on the second wall,
wherein the first bracket includes a first damping sleeve inserted into a first opening of the drive unit,
wherein the second bracket includes a second damping sleeve inserted into a second opening of the drive unit;
wherein the first damping sleeve and the second damping sleeve are screwed to the first and second wall, respectively, by a screw, and
wherein each for the first damping sleeve and the second damping sleeve includes a sleeve, and a damping element at least partially surrounding the sleeve and formed from a vibration-damping material.

20 . The vehicle according to claim 19 , further comprising:
a vehicle frame, wherein: (i) the frame interface of the drive assembly is an integral part of the vehicle frame, or (ii) the frame interface and/or at least one of the first and second walls is a separate component from the vehicle frame and is connected to the vehicle frame by a screw.

21 . The vehicle according to claim 19 , further comprising:
a chainring connected to an output shaft of the drive unit, and wherein the second bracket of the drive assembly is arranged on a side of the chainring.

Assignees

• Bosch Gmbh Robert

Inventors

• Braun Sigmund
• Dillmann Adolf
• Elter Alexander
• Hettinger Daniel
• Hundt Harald
• Binder Julian
• Holst Stefan

Classifications

• B62K19/34 Primary

  Bottom brackets · CPC title

• B62M6/55 Primary

  power-driven at crank shafts parts · CPC title

• B62M6/40 Primary

  Rider propelled cycles with auxiliary electric motor · CPC title

• B62M6/80

  Accessories, e.g. power sources; Arrangements thereof · CPC title

• F03G5/064

  using a bicycle or a bicycle pedal, e.g. pedal generators · CPC title