Gear system

Patent metadata

Field	Value
Publication number	US-9322465-B2
Application number	US-201313960992-A
Country	US
Kind code	B2
Filing date	Aug 7, 2013
Priority date	Oct 25, 2012
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

The invention relates to a gear system ( 1 ) comprising a main gear ( 2 ) and a gear ( 4 ) rotatable relative thereto in circumferential direction ( 3 ), comprising spring elements ( 8 ), by means of which the rotatable gear ( 4 ) is pretensioned in circumferential direction ( 3 ) against the main gear ( 2 ), wherein the spring elements ( 8 ) are connected on the one hand to the main gear ( 2 ) and on the other hand to the rotatable gear ( 4 ), and wherein the spring elements ( 8 ) each have a longitudinal middle axis ( 19 ) running obliquely relative to an axial end face ( 18 ) of the rotatable gear ( 4 ).

First claim

The invention claimed is:

1. A gear system comprising a main gear, a gear rotatable relative thereto in circumferential direction, and spring elements in the form of helical tension springs, the rotatable gear being pretensioned in circumferential direction against the main gear via the spring elements, the spring elements being connected on the one hand to the main gear and on the other hand to the rotatable gear, wherein the spring elements each have a longitudinal middle axis which is arranged obliquely relative to an axial end face of the rotatable gear so that the rotatable gear is pretensioned in an axial direction against the main gear, wherein the rotatable gear bears in an area only partly against the main gear, wherein said area is in the form of at least one annular web arranged on the main gear or arranged on the rotatable gear, wherein each of the spring elements has a respective first bent spring end section with a respective first spring end face and has a respective second bent spring end section with a respective second spring end face, wherein each of the spring elements is connected to the main gear and the rotatable gear such that the respective first and second spring end faces point to the inside of the gear system,
wherein the longitudinal middle axis of at least one of the spring elements runs at a first angle with respect to the axial end face,
wherein the longitudinal middle axis of another spring element runs at a second angle with respect to the axial end face, and
wherein the first angle is different from the second angle.

2. The gear system as claimed in claim 1 , wherein the longitudinal middle axes of the spring elements run at an angle to the axial end face, which is selected from a range with a lower limit of ±10° and an upper limit of ±70°.

3. The gear system as claimed in claim 1 , wherein the longitudinal middle axes of the spring elements which are projected onto the plane of the axial end face of the rotatable gear are arranged at an angle to one another which is not equal to 90° or a whole number multiple thereof.

4. The gear system as claimed in claim 1 , wherein at least two, in particular at least three or four spring elements are provided.

5. The gear system as claimed in claim 1 , wherein the main gear and/or the rotatable gear comprises or comprise at least one axial stop for the rotatable gear or the main gear.

6. The gear system as claimed in claim 1 , wherein in said area the main gear and/or the rotatable gear are provided with a friction-altering coating.

7. The gear system as claimed in claim 1 , wherein some of the spring elements have a different spring characteristic from the remaining spring elements.

8. A gear train comprising a first gear and a second gear, the first gear being arranged without play on a shaft, wherein the first gear is configured as a gear system as claimed in claim 1 .

9. The gear system according to claim 1 , wherein the main gear and the rotatable gear comprise recesses, wherein the spring elements are partly mounted respectively in the recesses, and wherein the spring elements do not project over an outer, axial end face of the main gear and an outer, axial end face of the rotatable gear.

10. The gear system according to claim 1 , wherein at least one of the spring elements is inclined in a different direction from the remaining spring elements.

Assignees

• Miba Sinter Austria Gmbh

Inventors

• Sandner Christian

Classifications

• F16H57/12

  Arrangements for adjusting or for taking-up backlash not provided for elsewhere · CPC title

• F16H2057/126

  Self-adjusting during operation, e.g. by a spring · CPC title

• F16H55/18 Primary

  Special devices for taking up backlash {(for gears having orbital motion F16H1/2863)} · CPC title

• Y10T74/19898

  Backlash take-up · CPC title

• F16H2057/127

  using springs · CPC title