Shaft bearing bush assembly for a valve arrangement

Patent metadata

Field	Value
Publication number	US-11536392-B2
Application number	US-202017120112-A
Country	US
Kind code	B2
Filing date	Dec 12, 2020
Priority date	Dec 13, 2019
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A shaft-bearing bush assembly for a valve arrangement for an air-conditioning system is disclosed. The shaft-bearing bush assembly includes a shaft drive-connectable to a valve of the valve arrangement and a bearing bush, in which the shaft is rotatably received relative to the bearing bush between a first rotary position and a second rotary position about an axis of rotation extending along the axial direction. A bush projection is non-rotatably arranged on the bearing bush relative to the bearing bush and a shaft projection is non-rotatably arranged on the shaft relative to the shaft. The bush projection and the shaft projection are matched to one another such that the bush projection provides a rotary stop for the shaft projection for limiting the rotary movement of the shaft between the first rotary position and the second rotary position.

First claim

The invention claimed is:

1. A shaft-bearing bush assembly for a valve arrangement having a valve for an air-conditioning system, comprising:
a shaft extending along an axial direction, the shaft being drive-connectable to the valve;
a bearing bush, in which the shaft is rotatably received relative to the bearing bush between a first rotary position and a second rotary position about an axis of rotation extending along the axial direction;
a bush projection non-rotatably arranged on the bearing bush relative to the bearing bush and a shaft projection non-rotatably arranged on the shaft relative to the shaft;
wherein the bush projection and the shaft projection are matched to one another such that the bush projection provides a rotary stop for the shaft projection for limiting the rotary movement of the shaft between the first rotary position and the second rotary position; and
wherein at least one of (i) the shaft projection is structured rib-like with a rib length measured in the axial direction of 4 mm to 6 mm and a rib height measured radially away from an outer surface of the shaft of 2 mm to 8 mm, and (ii) the bush projection is structured rib-like with a rib length measured in the axial direction of 4 to 6 mm and a radially measured rib height of 2 mm to 8 mm.

2. The shaft-bearing bush assembly according to claim 1 , further comprising at least one of:
a second shaft projection disposed on the shaft and non-rotatably arranged relative to the shaft, the second shaft projection arranged along a circumferential direction of the shaft at a shaft projection distance relative to the shaft projection; and
a second bush projection disposed on the bearing bush and non-rotatably arranged relative to the bearing bush, the second bush projection arranged along the circumferential direction of the bearing bush at a bush projection distance relative to the bush projection.

3. The shaft-bearing bush assembly according to claim 2 , wherein at least one of:
in a cross section perpendicularly to the axial direction the shaft projection and the second shaft projection are arranged projecting from the shaft and offset relative to one another by an angle of rotation measured in the circumferential direction at the shaft projection distance relative to one another; and
in the cross section perpendicularly to the axial direction the bush projection and the second bush projection are arranged projecting from the bearing bush and offset relative to one another by an angle of rotation measured in the circumferential direction at the bush projection distance relative to one another.

4. The shaft-bearing bush assembly according to claim 2 , wherein:
on the shaft both the shaft projection and the second shaft projection are provided and on the bearing bush exclusively the bush projection is present; or
on the bearing bush both the bush projection and the second bush projection are present and on the shaft exclusively the shaft projection is present.

5. The shaft-bearing bush assembly according claim 4 , wherein:
in a cross section perpendicularly to the axial direction the bush projection is arranged along the circumferential direction between the shaft projection and the second shaft projection; or
in the cross section perpendicularly to the axial direction the shaft projection is arranged along the circumferential direction between the bush projection and the second bush projection.

6. The shaft-bearing bush assembly according to claim 1 , wherein:
the bearing bush comprises a bearing section that merges in the axial direction into a stop section,
the shaft is rotatably mounted in the bearing section; and
in the stop section, the bush projection is arranged.

7. The shaft-bearing bush assembly according to claim 6 , wherein the bush projection is arranged on an axial bush end face of the bearing bush arranged at a transition between the bearing section and the stop section projecting from the bush end face along the axial direction.

8. The shaft-bearing bush assembly according to claim 6 , wherein on the bearing bush a stop section collar axially projecting from the bush end face and running around the bearing bush in the circumferential direction is present, and wherein the bush projection projects from the stop section collar radially to the inside.

9. The shaft-bearing bush assembly according to claim 1 , wherein at least one of:
the shaft projection limits a pocket-like recess present on the shaft, and
the bush projection limits a pocket-like recess present on the bearing bush.

10. The shaft-bearing bush assembly according to claim 1 , wherein one of:
on the shaft a fastening device is provided, structured and arranged to fasten the valve non-rotatably relative to the shaft,
a valve body of the valve is integrally moulded on the shaft; and
on the shaft a gear wheel for transmitting a torque for moving the valve is non-rotatably arranged.

11. The shaft-bearing bush assembly according to claim 1 , wherein:
the shaft comprises a bearing surface in a receiving region of the shaft, and the shaft is received in the bearing bush via the receiving region;
the bearing bush comprises a bearing surface; and
the bearing surface is substantially smooth or has a structure for receiving a lubricant.

12. The shaft-bearing bush assembly according to claim 1 , wherein at least one of:
the shaft projection is integrally moulded on the shaft;
the bush projection is integrally moulded on the bearing bush, and
the bearing bush is integrally moulded on a housing.

13. A valve arrangement for an air-conditioning system, comprising: an adjustable valve for influencing a fluid flow;
a shaft-bearing bush assembly, wherein the shaft-bearing bush assembly for adjusting the valve drive-connects a drive device of the valve arrangement to the valve, the shaft-bearing bush assembly including:
a shaft extending along an axial direction, the shaft being drive-connectable to the valve;
a bearing bush, in which the shaft is rotatably received relative to the bearing bush between a first rotary position and a second rotary position about an axis of rotation extending along the axial direction;
a first bush projection non-rotatably arranged on the bearing bush relative to the bearing bush and a shaft projection non-rotatably arranged on the shaft relative to the shaft;
a second bush projection disposed on the bearing bush and non-rotatably arranged relative to the bearing bush, the second bush projection arranged along the circumferential direction of the bearing bush at a bush projection distance relative to the first bush projection;
wherein the first bush projection, the second bush projection and the shaft projection are matched to one another such that the first bush projection and the second bush projection provide a rotary stop for the shaft projection for limiting the rotary movement of the shaft between the first rotary position and the second rotary position;
wherein the first bush projection and the second bush projection are each structured as a rib extending radially and axially along the bearing bush; and
wherein at least one of:
the shaft projection has a rib length measured in the axial direction of 4 mm to 6 mm and a rib height measured radially away from an outer surface of the shaft of 2 mm to 8 mm; and
the first bush projection and the second bush projection each have a rib length measured in the axial direction of 4 to 6 mm and a radially measured rib height of 2 mm to 8 mm.

14. The valve arrangement according to claim 13 , wherein the shaft-bearing bush assembly further includes a second shaft projection disposed on th

Assignees

• Mahle Int Gmbh

Inventors

• Fraas Marc
• Laux Holger
• Wolf Walter

Classifications

• F16C33/04 Primary

  Brasses; Bushes; Linings · CPC title

• B60H2001/007

  Manufacturing or assembling · CPC title

• F16C2361/91

  Valves · CPC title

• F16C2326/01

  Parts of vehicles in general · CPC title

• F16K31/44 Primary

  Mechanical actuating means · CPC title