# US 9,751,554 B2 · Steering system

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- Number: US 9,751,554 B2
- Document ID: US9751554B2
- Status: Granted
- Kind: B2
- Application number: 14/958,081
- Filed: 2015-12-03
- Published: 2016-06-16
- Granted: 2017-09-05
- Earliest claimed: 2014-12-12
- Assignees: Jtekt Corporation
- Applicants: Jtekt Corporation
- Inventors: Masayoshi Sakuda; Michiaki Yamaoka; Ryota Okano
- Web page: https://patentgrep.com/patent/US9751554B2

## CPC

- B62D 1/192: {Yieldable or collapsible columns}
- B62D 1/195: {Yieldable supports for the steering column}
- B62D: MOTOR VEHICLES; TRAILERS (steering, or guiding on a desired track, of agricultural machines or implements A01B69/00; wheels, castors, axles, increasing wheel adhesion B60B; vehicle tyres, tyre inflation or tyre changing B60C; connections between vehicles of a train or the like B60D; vehicles for use on rail and road, amphibious or convertible vehicles B60F; suspension arrangements B60G; heating, cooling, ventilating or other air treating devices B60H; windows, windscreens, non-fixed roofs, doors or similar devices, protective coverings for vehicles not in use B60J; propulsion plant arrangements, auxiliary drives, transmissions, controls, instrumentation or dashboards B60K; electric equipment or propulsion of electrically-propelled vehicles B60L; power supply for electrically-propelled vehicles B60M; passenger accommodation not otherwise provided for B60N; adaptations for load transportation or to carry special loads or objects B60P; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q; vehicles, vehicle fittings or vehicle parts not otherwise provided for B60R; servicing, cleaning, repairing, supporting, lifting, or manoeuvring, not otherwise provided for, B60S; brake arrangements, brake control systems or parts thereof B60T; air-cushion vehicles B60V; motor-cycles, accessories therefor B62J, B62K; testing of vehicles G01M)

## Abstract

A steering system includes a column jacket that can extend and contract in an axial direction as a result of relative movement between an inner jacket and an outer jacket that houses the inner jacket, a regulation member fixed to the outer jacket and passing through an insertion hole in the inner jacket, and an elastic member fixed to the outer jacket. At the time of vehicular collision, when the regulation member is sheared by a peripheral portion of the insertion hole in the inner jacket in conjunction with the relative movement between the inner jacket and the outer jacket, a tip portion of the elastic member is fitted in the insertion hole.

## Claims

### Claim 1

A steering system comprising:
a steering member;
a steering shaft to which the steering member is coupled at one end of the steering shaft and which is configured to extend and contact in an axial direction;
a column jacket having an inner jacket in which an insertion hole extending in the axial direction is provided in an outer surface of the inner jacket and which supports the steering shaft, and an outer jacket that houses the inner jacket to support the steering shaft, the column jacket configured to extend and contract in the axial direction along with the steering shaft as a result of relative movement between the inner jacket and the outer jacket in the axial direction;
a regulation member that is fixed to the outer jacket and passes through the insertion hole and that regulates a distance of the relative movement between the inner jacket and the outer jacket to within a range in which the regulation member is allowed to move in the axial direction within the insertion hole, the regulation member allowed to be sheared; and
an elastic member that has a tip portion arranged on the outer surface of the inner jacket at a position away from the insertion hole in the axial direction and that is fixed to the outer jacket, wherein
when, at a time of vehicular collision, the regulation member is sheared by a peripheral portion of the insertion hole in the inner jacket in conjunction with the relative movement between the inner jacket and the outer jacket, the elastic member is elastically deformed so that the tip portion is fitted in the insertion hole.

### Claim 2 (depends on 1)

The steering system according to claim 1, wherein
the inner jacket is located more toward the steering member than the outer jacket, and is movable in the axial direction to allow the column jacket to extend and contract.

### Claim 3 (depends on 1)

The steering system according to claim 1, wherein
the elastic member has a facing portion provided outside the outer jacket so as to face the regulation member.

### Claim 4 (depends on 1)

The steering system according to claim 1, wherein
the tip portion has an engagement portion configured to be engaged with the peripheral portion of the insertion hole in the inner jacket.