Commercial vehicle seat with rotatable seat part

Patent metadata

Field	Value
Publication number	US-9579995-B2
Application number	US-201314109117-A
Country	US
Kind code	B2
Filing date	Dec 17, 2013
Priority date	Dec 18, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The invention relates to a commercial vehicle seat having a seat substructure supporting part and a seat substructure base part each attached underneath a seat part, the seat substructure supporting part being movable and/or height-adjustable relative to the seat substructure base part, where the seat substructure supporting part comprises an upper supporting part joined to the underside of the seat part and a lower supporting part joined to the base part, wherein at least one roller bearing with a roller bearing ring, which extends orbitally about a notional rotary axis running in the vertical direction of said vehicle seat, is arranged between the upper supporting part and the lower supporting part, in order to rotatably support said upper supporting part relative to said lower supporting part.

First claim

What is claimed is:

1. A commercial vehicle seat, comprising:
a seat substructure supporting part;
a seat substructure base part;
a seat part;
a pair of rail elements,
wherein the seat substructure supporting part is connected to the seat substructure base part by the rail elements,
wherein the rail elements allow the seat substructure supporting part to be translated relative to the seat substructure base part,
wherein the seat substructure supporting part comprises an upper supporting part joined to an underside of the seat part and a lower supporting part joined to the seat substructure base part,
at least one roller bearing with a roller bearing ring, which extends orbitally about a rotary axis running in a vertical direction of said vehicle seat, arranged between the upper supporting part and the lower supporting part, in order to rotatably support said upper supporting part relative to said lower supporting part,
wherein the roller bearing is a ball bearing with a ball bearing race cage configured essentially like a ribbon and having a shape of a segment of a cone surface, wherein first sections of the ball bearing race cage are configured to hold balls of the ball bearing, wherein second sections of the ball bearing race cage are configured to space balls apart from each other, wherein the first section passes over second sections between the balls,
wherein the second sections have first and second individual elements, wherein the first individual elements are protruding elements of the second sections which are directed towards the ball bearing and are diagonally opposed to each other above and below a midline of the race cage and wherein the second individual elements are diagonally opposed to each other above and below the midline of the race cage in a direction perpendicular to a line through the diagonally opposed first individual elements and are slightly set back as regards a direction towards a ball center of one of the balls as compared to the first individual elements, such that the balls roll inside the ball bearing race cage on the first individual elements, and
wherein at least a portion of the rail elements and at least a portion of the roller bearing ring are intersected by a common plane, wherein the common plane is perpendicular to the rotary axis running in the vertical direction of said vehicle seat.

2. The commercial vehicle seat according to claim 1 , wherein a widthwise direction of the ball bearing race cage extends at an angle ranging from 10° to 80° to a direction of the rotary axis.

3. The commercial vehicle seat according to claim 2 , wherein the ball bearing race cage is circular and rests on a front and on a back side of every ball of the ball bearing in a direction of circular motion.

4. The commercial vehicle seat according to claim 1 , wherein the ball bearing is arranged on an underside in a disc-shaped recess formed centrally as a negative mould in the lower supporting part and on an upper side rests on a disc-shaped positive mould formed centrally on an underside of the upper supporting part.

5. The commercial vehicle seat according to claim 1 , wherein on the upper side the ball bearing is supported on an underside of the upper supporting part and on the underside it is supported in a bowl-shaped negative mould joined to the lower supporting part.

6. The commercial vehicle seat according to claim 1 , wherein two circular ball bearings with different diameters are arranged between the upper supporting part and the lower supporting part.

7. The commercial vehicle seat according to claim 1 , wherein the upper supporting part, which is rotatably supported relative to the lower supporting part, comprises a locking device for locking the upper supporting part against rotating movements relative to the lower supporting part.

8. The commercial vehicle seat according to claim 5 , wherein the locking device comprises a manually operated, spring-loaded movable pin element which is mounted on the upper supporting part, wherein the pin element is capable of engaging in a recess of complementary design to an end of a pin element in the lower supporting part.

9. The commercial vehicle seat according to claim 1 , wherein the first sections increase in their expansion towards front and rear marginal regions of each ball.

10. The commercial vehicle seat according to claim 1 , wherein the second sections enclose the balls on an upper side and underside by means of extensions of the second sections.

11. A commercial vehicle seat, comprising:
a seat substructure supporting part;
a seat substructure base part each attached underneath;
a seat part, the seat substructure supporting part being at least one of movable and height-adjustable relative to the seat substructure base part,
wherein the seat substructure supporting part comprises an upper supporting part joined to an underside of the seat part and a lower supporting part joined to the seat substructure base part,
wherein at least one roller bearing with a roller bearing ring, which extends orbitally about a rotary axis running in a vertical direction of said vehicle seat, is arranged between the upper supporting part and the lower supporting part, in order to rotatably support said upper supporting part relative to said lower supporting part,
wherein the roller bearing is a ball bearing with a ball bearing race cage configured essentially like a ribbon and having a shape of a segment of a cone surface,
wherein balls of the ball bearing are held by first sections of the ball bearing race cage,
wherein the first sections increase in their expansion towards front and rear marginal regions of each ball,
wherein the first section passes over continuous second sections of the ball bearing race cage between the balls, wherein the balls are spaced apart from each other with the second sections,
wherein the second sections have first and second individual elements, wherein the first individual elements are protruding elements of the second sections which are directed towards the ball bearing and are diagonally opposed to each other above and below a midline of the race cage and wherein the second individual elements are diagonally opposed to each other above and below the midline of the race cage in a direction perpendicular to a line through the diagonally opposed first elements and are slightly set back as regards a direction towards a ball center of one of the balls as compared to the first individual element, such that the balls roll inside the ball bearing race cage on the first individual elements.

Assignees

• Grammer Ag

Inventors

• Haller Erwin

Classifications

• F16C33/588

  Races of sheet metal · CPC title

• B60N2/146 Primary

  characterised by the locking device · CPC title

• F16C33/3856

  made from plastic, e.g. injection moulded window cages · CPC title

• B60N2/06

  slidable (B60N2/12 {, B60N2/2209} take precedence) · CPC title

• B60N2/16

  height-adjustable · CPC title