Freewheel and freewheel arrangement comprising such a freewheel

Patent metadata

Field	Value
Publication number	US-10274026-B2
Application number	US-201615338679-A
Country	US
Kind code	B2
Filing date	Oct 31, 2016
Priority date	Oct 31, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Disclosed is a freewheel (4) comprising a first race (38), a second race (40), a clamping gap (46) designed between the first and second race (38, 40), at least one clamping element (48) in the clamping gap (46), and biasing feature (64) for biasing the clamping element (48) into a clamping position within the clamping gap (46), wherein the biasing feature (64) have an accordion spring (66), which is supported directly or indirectly on the first race (38) and which comprises corrugation peaks (70) lying radially outward, corrugation troughs (72) lying radially inward, and a support leg (76) for direct or indirect support on the clamping element (48). In addition, disclosed is a freewheel arrangement (2) comprising such a freewheel (4).

First claim

The invention claimed is:

1. A freewheel ( 4 ) comprising a first race ( 38 ), a second race ( 40 ), a clamping gap ( 46 ) designed between the first and second race ( 38 , 40 ), at least one clamping element ( 48 ) in the clamping gap ( 46 ), and biasing means ( 64 ) for biasing the clamping element ( 48 ) into a clamping position within the clamping gap ( 46 ), wherein the biasing means ( 64 ) have an accordion spring ( 66 ), which is supported directly or indirectly on the first race ( 38 ) and which comprises corrugation peaks ( 70 ) lying radially outward, corrugation troughs ( 72 ) lying radially inward, and a support leg ( 76 ) for direct or indirect support on the clamping element ( 48 ), characterized in that the biasing means ( 64 ) have a spring support element ( 80 ) on which at least one of the corrugation peaks ( 70 ) is supported or supportable outwardly in radial direction ( 20 ) and/or at least one of the corrugation troughs ( 72 ) is supported or supportable inwardly in radial direction ( 22 ), wherein the spring support element ( 80 ) is stationarily fixed on the first race ( 38 ) or on a component of the freewheel ( 4 ) connected rotationally fixed to the first race ( 38 ), where the freewheel ( 4 ) includes a side part ( 62 ) laterally delimiting the clamping gap ( 46 ), wherein an intermediate element ( 78 ) is movably guided on the spring support element ( 80 ) in a longitudinal spring direction ( 88 , 90 ) along opposing circumferential directions ( 24 , 26 ) of the accordion spring ( 66 ) and wherein the biasing means ( 64 ) have at least one stop element ( 110 ) for supporting the intermediate element ( 78 ) in the direction of the clamping element ( 48 ), wherein the stop element ( 110 ) functions between the spring support element ( 80 ) and the intermediate element ( 78 ).

2. The freewheel ( 4 ) according to claim 1 , characterized in that the at least one corrugation peak ( 70 ) is supported or supportable outwardly in the radial direction ( 20 ) on the spring support element ( 80 ) and is that corrugation peak adjacent to the support leg ( 76 ), and/or two or more corrugation peaks ( 70 ) are supported or supportable outwardly in the radial direction ( 20 ) on the spring support element ( 80 ), and/or the at least one corrugation trough ( 72 ) is supported or supportable inwardly in the radial direction ( 22 ) on the spring support element ( 80 ) and is the corrugation trough ( 72 ) adjacent to the support leg ( 76 ), and/or two or more corrugation troughs ( 72 ) are supported or supportable inwardly in the radial direction ( 22 ) on the spring support element ( 80 ).

3. The freewheel ( 4 ) according to claim 1 , characterized in that the at least one corrugation peak ( 70 ) or the corrugation peaks ( 70 ) is/are supported or supportable outward in radial direction ( 20 ) at the accordion spring ( 66 ) in the longitudinal spring direction ( 88 , 90 ) along the opposing circumferential directions ( 24 , 26 ) within the freewheel ( 4 ), and/or the at least one corrugation trough ( 72 ) or the corrugation troughs ( 72 ) is/are supported or supportable inward in radial direction ( 22 ) at maximum extension of the accordion spring ( 66 ) in the longitudinal spring direction ( 88 , 90 ) along the opposing circumferential directions ( 24 , 26 ) within the freewheel ( 4 ).

4. The freewheel ( 4 ) according to claim 1 , characterized in that the biasing means ( 64 ) have the intermediate element ( 78 ), via which the support leg ( 76 ) of the accordion spring ( 66 ) is indirectly supported or supportable on the clamping element ( 48 ).

5. The freewheel ( 4 ) according to claim 1 , characterized in that the accordion spring ( 66 ) has a longitudinally extended spring base body ( 68 ), wherein the spring base body ( 68 ) is formed by a strip.

6. The freewheel ( 4 ) according to claim 1 , characterized in that the spring support element ( 80 ) is arranged to be movable in the longitudinal spring direction ( 88 , 90 ) along the opposing circumferential directions ( 24 , 26 ) or guided on the first race ( 38 ) or on a component of the freewheel ( 4 ) connected rotationally fixed to the first race ( 38 ), where the freewheel ( 4 ) includes a side part ( 62 ) laterally delimiting the clamping gap ( 46 ) while supporting the spring support element ( 80 ) in the radial direction ( 20 , 22 ), wherein the spring support element ( 80 ) is fixed on the intermediate element ( 78 ) or is designed as one piece with the intermediate element ( 78 ).

7. The freewheel ( 4 ) according to claim 6 , characterized in that the spring support element ( 80 ) has a radially outward support wall ( 82 ) for supporting the at least one corrugation peak ( 70 ) and a diametrically opposite radially inward support wall ( 84 ) for supporting the at least one corrugation trough ( 72 ) which are connected to one another via a connection element ( 86 ), wherein the connection element ( 86 ) is formed by the intermediate element ( 78 ) and/or a side wall of the spring support element ( 80 ) arranged axially adjacent to the accordion spring ( 66 ).

8. The freewheel ( 4 ) according to claim 7 , characterized in that the spring support element ( 80 ), the intermediate element ( 78 ) guided thereon, or the radially outer and inner support wall ( 82 , 84 ) is designed as bent or curved.

9. The freewheel ( 4 ) according to claim 8 , characterized in that a spring base body ( 68 ) of the accordion spring ( 66 ) is deformed in the region of support section ( 116 ) of the accordion spring ( 66 ) to increase the flexural strength of the support section ( 116 ), wherein at least one longitudinally extended, depression ( 118 ) is provided in the spring base body ( 68 ) in the region of the support section ( 116 ) of the accordion spring ( 66 ), the longitudinally extended depression ( 118 ) extends, centered, in an extension direction of the support section ( 116 ) of the accordion spring ( 66 ).

10. The freewheel ( 4 ) according to claim 6 , characterized in that the biasing means ( 64 ) have at least one stop element ( 92 , 94 , 96 , 98 , 100 ) for supporting the spring support element ( 80 ) in the direction of the clamping element ( 48 ), wherein the stop element ( 92 , 94 , 96 , 98 , 100 ) functions between the first race ( 38 ), the component of the freewheel ( 4 ), the side part ( 62 ), or a projection ( 74 ), and the spring support element ( 80 ), or that the biasing means ( 64 ) have at least one stop element ( 120 ) for supporting the support section ( 116 ) of the accordion spring ( 66 ) in the direction of the clamping element ( 48 ), wherein the stop element ( 120 ) functions between the first race ( 38 ), or a component of the freewheel ( 4 ) connected rotationally fixed to the first race ( 38 ), where the freewheel ( 4 ) includes the side part ( 62 ) laterally delimiting the projection ( 74 ) on the first race ( 38 ), or the component, and the support section ( 116 ) of the accordion spring ( 66 ).

11. The freewheel ( 4 ) according to claim 1 , characterized in that the spring support element ( 80 ) is formed by a support section ( 116 ) of the accordion spring ( 66 ), wherein the support section ( 116 ) of the accordion spring ( 66 ) extends to support the at least one corrugation peak ( 70 ) or the at least one corrugation trough ( 72 ) radially outside of the at least one corrugation peak ( 70 ) or radially inside of the at least corrugation trough ( 72 ), and is formed as an extension of the support leg ( 76 ).

12. The freewheel ( 4 ) according to claim 1 , characterized in that the spring support element ( 80 ) and/or the intermediate element ( 78 ) is manufactured from plastic material.

Assignees

• Borgwarner Inc

Inventors

• Veit Matthias Gerhard
• Hertel Marcus Thomas
• Schmitt Dirk Achim
• Rapp Kay

Classifications

• F02N15/025

  of the friction type · CPC title

• F16D2041/0605

  Spring details · CPC title

• F02N15/023

  of the overrunning type · CPC title

• F16D41/067

  and the members being distributed by a separate cage encircling the axis of rotation · CPC title

• F16D41/066 Primary

  all members having the same size and only one of the two surfaces being cylindrical · CPC title