# US 2018/0022401 A1 · Cab suspension for a tiltable cab of a commercial vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0022401 A1 - Document ID: US20180022401A1 - Status: Published application - Kind: A1 - Application number: 15/650,461 - Filed: 2017-07-14 - Published: 2018-01-25 - Earliest claimed: 2016-07-19 - Assignees: Man Truck & Bus öSterreich Gesmbh - Applicants: MAN Truck & Bus Österreich GesmbH - Inventors: Klemens Täuber; Martin Moser; Rudolf Bramberger - Web page: https://patentgrep.com/patent/US20180022401A1 ## CPC - B62D 33/0604: {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)} - B62D 33/067: tiltable - B62D 33/06: Drivers' cabs {(overhead guards, e.g. against loads falling down B60R21/11; roll-over protection B60R21/13)} - 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 The present disclosure relates to a cab suspension for a tiltable cab of a commercial vehicle, preferably a front cab-suspension. The cab suspension includes two brackets for mounting on a frame construction of the commercial vehicle in a manner fixed to the frame, a vibration construction for damping movements of the cab whilst the commercial vehicle is travelling, wherein the vibration construction has two lateral bearing portions and a cross-element connecting the bearing portions, and a torsion-bar construction for tilting the cab. The cab suspension is particularly notable in that the brackets have a ramp structure along which the vibration construction may be guided backwards and upwards in the event of a frontal collision and/or the vibration construction and the torsion-bar construction are functionally separate from one another. ## Claims ### Claim 1 A cab suspension for a tiltable cab of a commercial vehicle comprising: two brackets for mounting on a frame construction of the commercial vehicle, in a manner fixed to the frame; a vibration construction for damping movements of the cab whilst the commercial vehicle is travelling, wherein the vibration construction has two lateral bearing portions and a cross-element connecting the bearing portions; and a torsion-bar construction for tilting the cab, wherein the brackets a ramp structure along which the vibration construction may be guided backwards and upwards in the event of a frontal collision, or the vibration construction and the torsion-bar construction are functionally separate from one another. ### Claim 2 (depends on 1) The cab suspension according to claim 1, wherein the two brackets are mounted on a cross-member of the frame construction, ### Claim 3 (depends on 1) The cab suspension according to claim 1, wherein the vibration construction and the torsion-bar construction are supported by means of mutually separate bearing arrangements or are separate from one another as a result of being constructed as mutually separate component units. ### Claim 4 (depends on 1) The cab suspension according to claim 1, wherein the torsion-bar construction is rotatably mounted on the brackets so that the brackets serve as a bearing arrangement for the torsion-bar construction. ### Claim 5 (depends on 1) The cab suspension according to claim 1, wherein the brackets are each provided with a pre-tensioning device for pre-tensioning the torsion-bar construction. ### Claim 6 (depends on 1) The cab suspension according to claim 1, wherein the bearing portions of the vibration construction are supported by deformation bearings which serve as a bearing arrangement for the vibration construction. ### Claim 7 (depends on 6) The cab suspension according to claim 6, wherein the deformation bearings are selected from the group consisting of strut bearings, elastomeric bearings, pot bearings, spherical bearings, and combination thereof. ### Claim 8 (depends on 6) The cab suspension according to claim 6, wherein the deformation bearings are guided through through-openings in the brackets or expediently supported directly with their lower side below the brackets. ### Claim 9 (depends on 8) The cab suspension according to claim 8, wherein the deformation bearings are moved out of the through-openings in the brackets in the event of a frontal collision. ### Claim 10 (depends on 1) The cab suspension according to claim 1, wherein the cab suspension has two bearing blocks for rotatable mounting of the cab and the bearing blocks are rotatably mounted on the bearing portions of the vibration construction so that they are rotatable relative to the bearing portions of the vibration construction. ### Claim 11 (depends on 1) The cab suspension according to claim 1, wherein the bearing portions of the vibration construction each have two upwardly projecting mounting portions and the bearing blocks for rotatable mounting of the cab are each rotatably supported on or between the two mounting portions. ### Claim 12 (depends on 1) The cab suspension according to claim 1, wherein the torsion-bar construction is rotatable about at least one first axis of rotation, the bearing portions of the vibration construction are rotatable about a second axis of rotation and the two bearing blocks for rotatable mounting of the cab are rotatable about a third axis of rotation and preferably the at least one first axis of rotation, the second axis of rotation and the third axis of rotation are spaced from one another and extend substantially parallel. ### Claim 13 (depends on 1) The cab suspension according to claim 1, wherein the cross-element of the vibration construction may be guided upwards along the ramp structure in the event of a frontal collision or the two bearing portions of the vibration construction are expediently supported on side-members of the frame construction of the commercial vehicle at the back. ### Claim 14 (depends on 1) The cab suspension according to claim 1, wherein the brackets have a substantially horizontal section and an upwardly projecting section, and the ramp structure is formed by end faces of the upwardly projecting sections, the two bearing portions of the vibration construction are each arranged laterally outside the upwardly projecting sections, or the two bearing blocks are each arranged laterally outside the upwardly projecting sections. ### Claim 15 (depends on 1) The cab suspension according to claim 1, wherein the brackets are mounted on a cross-member of the frame construction or the deformation bearings are mounted on bearing structures formed on the cross-member. ### Claim 16 (depends on 1) The cab suspension according to claim 1, wherein the cab may be positioned on the cab suspension in the tilted position and in the driving position. ### Claim 17 A cab for a commercial vehicle comprising: a tiltable cab; and a cab suspension for the tiltable cab including, two brackets for mounting on a frame construction of the commercial vehicle, in a manner fixed to the frame; a vibration construction for damping movements of the cab whilst the commercial vehicle is travelling, wherein the vibration construction has two lateral bearing portions and a cross-element connecting the bearing portions; and a torsion-bar construction for tilting the cab, wherein the brackets a ramp structure along which the vibration construction may be guided backwards and upwards in the event of a frontal collision, or the vibration construction and the torsion-bar construction are functionally separate from one another.