# US 10,118,643 B2 · Front sub-frame structure

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- Number: US 10,118,643 B2
- Document ID: US10118643B2
- Status: Granted
- Kind: B2
- Application number: 15/761,176
- Filed: 2016-11-01
- Published: 2018-09-13
- Granted: 2018-11-06
- Earliest claimed: 2015-11-11
- Assignees: Mazda Motor Corporation
- Applicants: Mazda Motor Corporation
- Inventors: Katsuyuki Komiya; Masaaki Tanaka
- Web page: https://patentgrep.com/patent/US10118643B2

## CPC

- B62D 21/11: with resilient means for suspension {, e.g. of wheels or engine; sub-frames for mounting engine or suspensions}
- B60K 5/12: Arrangement of engine supports
- B62D 21/06: of X-shaped or fork-shaped construction, i.e. having members which form an X or fork as the frame is seen in plan view
- B62D 25/085: {Front-end modules}
- 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)
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

To reinforce a front sub-frame in such a manner that the front sub-frame having a trapezoidal shape formed by a cross member and left and right side members extending to one side is not deformed to a rhombus shape at the one side, a front sub-frame structure includes: a rear cross member (74) coupling arm supporting parts (71, 71) supported on left and right side members (6, 6); tilt members (75) coupling left and right intermediate portions of the rear cross member (74) to rear vehicle attachment parts (M3) of the side members (6); a brace (80) coupling the left and right arm supporting parts (71, 71) to the rear vehicle attachment parts (M3); and intermediate coupling parts (91) coupling the brace (80) to intermediate portions of the tilt members (75).

## Claims

### Claim 1

An automobile front sub-frame structure including a pair of left and right front side frames extending from a cabin front face toward a vehicle front, and a front sub-frame disposed below the front side frame and supporting a front suspension device, the front sub-frame structure comprising:
a cross member coupling arm supporting parts supported by the left and right side members of the front sub-frame;
tilt members coupling laterally separated left and right intermediate portions of the cross member to longitudinally one-side vehicle attachment parts of the side members, the longitudinally one-side vehicle attachment parts being disposed at one longitudinal side of the side members;
a brace coupling the left and right arm supporting parts to the longitudinally one-side vehicle attachment parts diagonally disposed to the arm supporting parts; and
intermediate coupling parts coupling the brace to intermediate portions of the tilt members.

### Claim 2 (depends on 1)

The front sub-frame structure of claim 1, wherein the cross member, the tilt members, and the side members are coupled to each other by engine mount brackets.

### Claim 3 (depends on 1)

The front sub-frame structure of claim 1, wherein the brace includes brace members disposed at left and right portions of the brace and at the one longitudinal side of the brace.