Suspension system for a cabin of a land vehicle

Patent metadata

Field	Value
Publication number	US-11167809-B2
Application number	US-201716753963-A
Country	US
Kind code	B2
Filing date	Oct 9, 2017
Priority date	Oct 9, 2017
Publication date	Nov 9, 2021
Grant date	Nov 9, 2021

Abstract

A suspension system (2) comprising two flanges (10A, 10B), defining respective absolute reference positions, the second flange (10B) defining a relative reference position relative to the first flange (10A); and a core member (17), which is mobile only along a two degrees of freedom (M19, R19), a damper (21) applying an elastic return for bringing back the core member (17) to two degree reference positions; wherein the positions of the flanges (10A, 10B) and of the core member (17) are mechanically linked so that: when the flanges (10A, 10B) are in the absolute reference positions, the core member (17) is in the two degree reference positions; when the second flange (10B) is away from the relative reference position, the core member is away from the first degree reference position; and when the flanges (10A, 10B) are away from the absolute reference positions, the core member is away from the second degree reference position.

First claim

The invention claimed is:

1. A suspension system for a cabin of a land vehicle, the suspension system comprising:
a frame, configured to be fixedly connected to a chassis of the land vehicle;
a first flange, located at a first transversal side of the suspension system and configured to be fixedly connected to the cabin, the first flange being mobile relative to the frame and defining a first absolute reference position relative to the frame;
a second flange, located at a second transversal side of the suspension system and configured to be fixedly connected to the cabin, the second flange being mobile relative to:
the frame, the second flange defining a second absolute reference position relative to the frame, and
the first flange, the second flange defining a relative reference position relative to the first flange; and

a core member connected to the frame by:
a core joint of the suspension system, so that the core member is mobile relative to the frame only along a first degree of freedom and along a second degree of freedom, and
a damper, applying an elastic return onto the core member relative to the frame, for bringing back the core member to a first degree reference position of the first degree of freedom and to a second degree reference position of the second degree of freedom, relative to the frame;

wherein the respective positions of the first flange and of the second flange are mechanically linked to the position of the core member by a first rod and a second rod of the suspension system, the first rod connecting the first flange to the core member and the second rod connecting the second flange to the core member, so that:
when the first flange is in the first absolute reference position and the second flange is in the second absolute reference position, the core member is in the first degree reference position and in the second degree reference position;
when the second flange is positioned away from the relative reference position relative to the first flange, the core member is positioned away from the first degree reference position; and
when at least one of the first flange is positioned away from the first absolute reference position, or the second flange is positioned away from second the absolute reference position, the core member is positioned away from the second degree reference position.

2. The suspension system of claim 1 , wherein the core joint is configured so that:
the first degree of freedom is a translation parallel to a reference axis of the suspension system, said reference axis being perpendicular to a medial plane of the suspension system and fixed relative to the frame, the first transversal side and the second transversal side being respectively located at either sides of the medial plane; and
the second degree of freedom is a rotation around the reference axis.

3. The suspension system of claim 2 , wherein the suspension system comprises:
a first rod-core hinge, rotatably connecting the first rod to the core member, around only a first core axis perpendicular to the reference axis; and
a second rod-core hinge, rotatably connecting the second rod to the core member, around only a second core axis perpendicular to the reference axis.

4. The suspension system of claim 2 , wherein the suspension system comprises:
a first rod-flange hinge, rotatably connecting the first rod to the first flange around only a first flange axis, said first flange axis being parallel to the reference axis; and
a second rod-flange hinge, rotatably connecting the second rod to the second flange around only a second flange axis, said second flange axis being parallel to the reference axis.

5. The suspension system of claim 1 , wherein the suspension system further comprises:
a first arm, located at the first transversal side and comprising:
a first arm-cabin hinge, rotatably connecting the first arm to the first flange, and
a first arm-chassis hinge, rotatably connecting the first arm to the frame, the first arm-chassis hinge and the first arm-cabin hinge allowing rotation around parallel respective transversal axes; and

a second arm, located at the second transversal side and comprising:
a second arm-cabin hinge, rotatably connecting the second arm to the second flange, and
a second arm-chassis hinge, rotatably connecting the second arm to the frame, the second arm-chassis hinge and the second arm-cabin hinge allowing rotation around parallel respective transversal axes.

6. The suspension system of claim 4 ,
wherein the suspension system further comprises:
a first arm, located at the first transversal side and comprising:
a first arm-cabin hinge, rotatably connecting the first arm to the first flange, and
a first arm-chassis hinge, rotatably connecting the first arm to the frame, the first arm-chassis hinge and the first arm-cabin hinge allowing rotation around parallel respective transversal axes; and

a second arm, located at the second transversal side and comprising:
a second arm-cabin hinge, rotatably connecting the second arm to the second flange, and
a second arm-chassis hinge, rotatably connecting the second arm to the frame, the second arm-chassis hinge and the second arm-cabin hinge allowing rotation around parallel respective transversal axes;

wherein when the core member is in the first degree reference position and in the second degree reference position, the respective transversal axes of the first arm-chassis hinge and the second arm-chassis hinge are coaxial with the respective first and second flange axis of the first rod-flange hinge, the second rod-flange hinge.

7. The suspension system of claim 1 , wherein the first rod and the second rod are oriented away from each other, from the core member to the first flange and second flange.

8. The suspension system of claim 1 , wherein the damper comprises at least:
a first elastic member, exerting a first component of the elastic return along the first degree of freedom, for bringing back the core member to the first degree reference position; and
a second elastic member, separate from the first elastic member, exerting a second component of the elastic return along the second degree of freedom, for bringing back the core member to the second degree reference position.

9. The suspension system of claim 2 , wherein the damper comprises at least:
a first elastic member, exerting a first component of the elastic return along the first degree of freedom, for bringing back the core member to the first degree reference position; and
a second elastic member, separate from the first elastic member, exerting a second component of the elastic return along the second degree of freedom, for bringing back the core member to the second degree reference position

wherein the first elastic member comprises at least one transversal elastic member interposed between the core member and the frame, parallel to the reference axis.

10. The suspension system of claim 9 , further comprising two antagonist transversal elastic members, each of said transversal elastic members being interposed between a respective frame transversal stop of the frame and a respective core transversal stop of the core member.

11. The suspension system of claim 8 , wherein the second elastic member comprises at least one tangential elastic member, interposed between the core member and the frame, and extending tangentially to the reference axis.

12. The suspension system of claim 11 , wherein the tangential elastic member comprises:
an upper hinge, rotatably connecting the tangential elastic member to the core member, around an axis parallel to the reference axis;
a lower hinge, ro

Assignees

• Volvo Truck Corp

Inventors

• Dusert Christophe

Classifications

• B62D33/06

  Drivers' cabs {(overhead guards, e.g. against loads falling down B60R21/11; roll-over protection B60R21/13)} · CPC title

• B60G99/00 Primary

  Subject matter not provided for in other groups of this subclass · CPC title

• B60G2204/162

  Cabins, e.g. for trucks, tractors · CPC title

• B62D33/0604 Primary

  Cabs insulated against vibrations or noise, e.g. with elastic suspension (resilient connections between superstructure sub-units B62D27/04; damping noise in general G10K11/00; for vehicles in general B60R13/08) · CPC title

• B60G99/006

  Other suspension arrangements with metallic springs · CPC title