Pulley device for chain or belt

Patent metadata

Field	Value
Publication number	US-9709154-B2
Application number	US-201514799642-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 17, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A pulley assembly comprising an inner ring, an outer ring, at least one row of rolling elements between the inner and outer rings, a pulley rotationally secured with the outer ring, having an outer radial surface for engagement with a chain or belt, a screw comprising a head and a stem radially housed inside the inner ring and having an outer peripheral groove, a mounting support element having a receiving bore or housing for receiving the screw head and an axial retaining member retaining the screw stem within the receiving housing, the member being engaged in the outer groove of the screw stem. The mounting support element includes a cavity that emerges in the receiving bore. When the screw is installed within the receiving bore, the outer groove is axially across from the mounting support element cavity and the axial retaining element is engaged in the mounting support element cavity.

First claim

The invention claimed is:

1. A pulley device for a chain or belt, comprising:
an inner ring;
an outer ring;
at least one row of rolling elements mounted between the inner ring and the outer ring;
a pulley secured in rotation with the outer ring and provided with an outer radial surface for engaging with a chain or belt;
a screw comprising a head and a stem housed radially in the inner ring and provided with an outer peripheral groove;
a mounting support element provided with a receiving bore for the stem of the screw; and
an axial retaining member keeping the stem of the screw inside the receiving bore, the axial retaining member being engaged in the outer peripheral groove of the stem of the screw,
wherein the mounting support element is provided with a cavity that emerges in the receiving bore,
wherein, when the screw is installed in the receiving bore of the device, the outer peripheral groove is axially across from the cavity of the mounting support element and the axial retaining member is also engaged in the cavity of the mounting support element, wherein a first axial length of the axial retaining member is one of equal to or slightly larger than a second axial length of the cavity of the mounting support element,
wherein the mounting support element defines a housing for receiving the head of the screw.

2. The device according to claim 1 , wherein a third axial length of the outer peripheral groove of the screw is greater than the first axial length of the axial retaining member and a difference between the third axial length of the outer peripheral groove of the screw and the first axial length of the axial retaining member is one of greater than or equal to a fourth axial length of the housing for receiving the head of the screw.

3. The device according to claim 1 , wherein the axial retaining member has a frustoconical outer surface and a cylindrical central bore.

4. The device according to claim 1 , wherein the axial retaining member has an annular shape.

5. The device according to claim 1 , wherein the axial retaining member has an axial slot facilitating placement in the cavity and the outer peripheral groove.

6. The device according to claim 1 , wherein the axial retaining member is made from an elastic material, preferably a synthetic material or spring steel.

7. The device according to claim 1 , wherein the axial retaining member is made from an elastic material, wherein the elastic material is one of a synthetic material or spring steel.

8. The device according to claim 1 , wherein the mounting support element is the inner ring.

9. The device according to claim 1 , wherein the mounting support element is a force-reacting plate.

10. The device according to claim 1 , wherein the mounting support element is a sleeve radially intercalated between the inner ring and the screw.

11. A pulley device for a chain or belt, comprising:
an inner ring;
an outer ring;
at least one row of rolling elements mounted between the inner ring and the outer ring;
a pulley secured in rotation with the outer ring and provided with an outer radial surface for engaging with a chain or belt;
a screw comprising a head and a stem housed radially in the inner ring and provided with an outer peripheral groove;
a mounting support element provided with a receiving bore for the stem of the screw; and
an axial retaining member keeping the stem of the screw inside the receiving bore, the axial retaining member being engaged in the outer peripheral groove of the stem of the screw,
wherein the mounting support element is provided with a cavity that emerges in the receiving bore,
wherein, when the screw is installed in the receiving bore of the device, the outer peripheral groove is axially across from the cavity of the mounting support element and the axial retaining member is also engaged in the cavity of the mounting support element,
wherein the mounting support element defines a housing for receiving the head of the screw, and wherein a first axial length of the outer peripheral groove of the screw is greater than a second axial length of the axial retaining member and a difference between the first axial length of the outer peripheral groove of the screw and the second axial length of the axial retaining member is one of greater than or equal to a third axial length of the housing for receiving the head of the screw.

Assignees

• Albrecht Dirk
• Lescorail Romuald
• Liege Frederic
• Tronquoy Nicolas
• Skf Ab

Inventors

• Albrecht Dirk
• Lescorail Romuald
• Liege Frederic
• Tronquoy Nicolas

Classifications

• F16H7/20

  Mountings for rollers or pulleys · CPC title

• F16H55/36 Primary

  Pulleys (with features essential for adjustment F16H55/52) · CPC title

• F16H2007/0865

  Pulleys · CPC title

• F16C2226/80

  with splines, serrations or similar profiles to prevent movement between joined parts · CPC title

• F16C13/006

  Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one · CPC title