Transverse segment for a drive belt and a drive belt for a continuously variable transmission including the transverse segment and a ring stack

Patent metadata

Field	Value
Publication number	US-11486464-B2
Application number	US-202017114999-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Dec 10, 2019
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Transverse segments (10) for a drive belt (6) for a belt-and-pulley-type continuously variable transmission include a row of these transverse segments (10) mounted on a stack (9) of several, mutually nested rings. The transverse segments (10) are provided with a protrusion (40) that protrudes from a front surface (11) thereof and with a corresponding cavity (41) that is provided in a back surface (12) thereof. An offset is provided between the protrusion (40) and the cavity (41) in the radial direction of the drive belt (6), such that in the row of transverse segments (10) in the drive belt (6) these will be inclined backwards by the forced insertion of the protrusion (40) into the cavity (41).

First claim

The invention claimed is:

1. A transverse segment ( 10 ) for a drive belt ( 6 ) provided with a ring stack ( 9 ) consisting of a number of mutually nested bands and with a number of such transverse segments ( 10 ) that are movably arranged in a row on the ring stack ( 9 ), which transverse segment ( 10 ) defines a slot ( 33 ) for accommodating the ring stack ( 9 ), which slot ( 33 ) is bounded, in radial inward direction, by a bearing surface ( 42 ) of a base portion ( 13 ) of the transverse segment ( 10 ) for supporting the radial inside of the ring stack ( 9 ), which transverse segment ( 10 ) further comprises a part ( 15 ; 17 ) that is located radial outward of the ring stack ( 9 ) when incorporated in the drive belt ( 6 ), in which part ( 15 ; 17 ) a protrusion ( 40 ) is provided on a front surface ( 11 ) of the transverse segment ( 10 ) and a cavity ( 41 ) in an oppositely located back surface ( 12 ) thereof, characterized in that the protrusion ( 40 ) is positioned on the front surface ( 11 ) radially inward relative to the position of the cavity ( 41 ) in the back surface ( 12 ) with a radially inner side of the protrusion ( 40 ) being located radially inward relative to a radially inner side of the cavity ( 41 ).

2. The transverse segment ( 10 ) according to claim 1 , characterised in that the protrusion ( 40 ) and the cavity ( 41 ) thereof are provided with a predominantly cylindrical shape, with an outer diameter of the protrusion ( 40 ) being smaller than an inner diameter of the cavity ( 41 ), and in that a centerline (CA 40 ) of the protrusion ( 40 ) is located radially inward of a centerline (CA 41 ) of the cavity ( 41 ) with a mutual distance in radial direction there between that is larger than half the difference in diameter between the protrusion ( 40 ) and the cavity ( 41 ).

3. The transverse segment ( 10 ) according to claim 2 , characterised in that the distance in radial direction has a value in the range from 0.035 mm tot 0.100 mm.

4. The transverse segment ( 10 ) according to claim 1 , characterised in that the transverse segment ( 10 ) is provided with a tilting edge ( 18 ) in the form of an area of the front surface ( 11 ) thereof that is convexly curved in the radial direction and that extends perpendicular to the radial direction along the width of the transverse segment ( 10 ).

5. The transverse segment ( 10 ) according to claim 1 , characterised in that an angle between the bearing surface ( 42 ) and the back surface ( 12 ) thereof is smaller than 90 degrees.

6. A drive belt ( 6 ) provided with a ring stack ( 9 ) including a number of mutually nested bands and with the transverse segment ( 10 ) according to claim 1 that is movably arranged in a row of transverse segments ( 10 ) on the ring stack ( 9 ) and whereof the projection ( 40 ) is located in the cavity ( 41 ) of a respectively adjacent transverse segment ( 10 ) in the row of transverse segments ( 10 ), characterized in that, at least in a straightened section of the drive belt ( 6 ), the transverse segment ( 10 ) is inclined backwards relative to the ring stack ( 9 ), whereby an angle (β) between the back surface ( 12 ) of the transverse segment ( 10 ) and the ring stack ( 9 ) is less than 90 degrees.

7. The drive belt ( 6 ) according to claim 6 , characterised in that an angle between the bearing surface ( 42 ) and the back surface ( 12 ) of the transverse segment ( 10 ) amounts to 90 degrees minus the angle (β) at which the transverse segment is inclined backwards relative to the ring stack ( 9 ).

Assignees

• Bosch Gmbh Robert

Inventors

• Van Der Meer Cornelis Johannes Maria
• Groener Maud
• Van Hoek Rob Petrus Maria

Classifications

• F16G1/21 Primary

  built-up from superimposed layers, e.g. zig-zag folded · CPC title

• B21D53/14

  belts, e.g. machine-gun belts · CPC title

• F16G5/16 Primary

  consisting of several parts · CPC title

• F16G5/166 Primary

  with non-metallic rings (F16G5/18 takes precedence) · CPC title