Motor vehicle automatic impact braking system
阅读：412发布：2022-02-21
专利汇可以提供Motor vehicle automatic impact braking system专利检索，专利查询，专利分析的服务。并且The system automatically actuates the standard otherwise operator controlled wheel brakes of a motor vehicle upon impact to either longitudinal end of the vehicle. The impact may be delivered directly to projections, two for each bumper, that extend freely through the vehicle bumper for a considerable distance beyond the confines of the bumper so that with a head-on collision the brakes will be actuated before there is contact with the bumper, or with a collision from the side the bumpers, which are elastically connected to the vehicle frame, will elastically deform a substantial extent in the longitudinal and transverse direction before a longitudinal lost motion connection between the bumper and projections drivingly connects the two for actuating the brakes upon further longitudinal movement of the bumper and projection as a unit. In either event, longitudinal inward movement of the projection, through the intermediary of a coil spring, will contract an expansible chamber, one associated with each projection, to pressurize fluid within a line leading to a balancing chamber having a fluid output connected to each of the wheel brakes. The wheel brakes are provided with conventional hydraulic wheel cylinders to be pressurized selectively by the vehicle operator and auxiliary hydraulic wheel cylinders to be pressurized as mentioned above automatically in response to impact through inward longitudinal driving of the projections.，下面是Motor vehicle automatic impact braking system专利的具体信息内容。
1. A motor vehicle impact braking system, comprising: a motor vehicle frame having a longitudinal axis; a plurality of wheels rotatably mounted on said frame about axes generally perpendicular to said longitudinal axis to support the vehicle frame; a brake for at least one of said wheels; first expansible chamber means being expandible under fluid pressure to actuate said brake for braking the one vehicle wheel with respect to said frame; a bumper mounted on said vehicle frame at one longitudinal end thereof; a longitudinally extending impact member mounted for generally longitudinal movement with respect to said frame and bumper, and extending longitudinally beyond said bumper away from said frame to a terminal free end; second expansible chamber means drivingly connected between said frame and said impact member to pressurize fluid contained therein upon impact of said impact member terminal free end with an object having a relative longitudinal speed component with respect to said vehicle frame; fluid communication means interconnecting said first and second expansible chamber means so that contraction of said second expansible chamber means will expand said first expandible chamber means to actuate said wheel brake automatically in response to an impact having a longitudinal component of force applied to said impact member; said bumper being mounted to said frame by means elastically deforming to permit substantial longitudinal predetermined elastic movement of said bumper with respect to said frame for absorbing, without permanent damage, fairly substantial impacts directly on said bumper; and means providing a longitudinal lost motion connection between said impact member and bumper to permit said elastic movement of said bumper without moving said impact member, and provide a driving connection between said bumper and impact member for longitudinal relative movement greater than said predetermined elastic movement to automatically actuate said wheel brake through said expansible chamber means without said impact member directly engaging the impact object.
2. A motor vehicle impact braking system, comprising: a motor vehicle frame having a longitudinal axis; a plurality of wheels rotatably mounted on said frame about axes generally perpendicular to said longitudinal axis to support the vehicle frame; a brake for at least one of said wheels; first expansible chamber means being expandible under fluid pressure to actuate said brake for braking the one vehicle wheel with respect to said frame; a bumper mounted on said vehicle frame at one longitudinal end thereof; a longitudinally extending impact member mounted for generally longitudinal movement with respect to said frame and bumper, and extending longitudinally beyond said bumper away from said frame to a terminal free end; second expansible chamber means drivingly connected between said frame and said impact member to pressurize fluid contained therein upon impact of said impact member terminal free end with an object having a relative longitudinal speed component with respect to said vehicle frame; fluid communication means interconnecting said first and second expansible chamber means so that contraction of said second expansible chamber means will expand said first expandible chamber means to actuate said wheel brake automatically in response to an impact having a longitudinal component of force applied to said impact member; said impact member including a coil compression spring having an axis parallel with said frame longitudinal axis; a relatively stiff molded portion encompassing the coils at one end of said compression spring and extending beyond to said terminal free end; a piston rod secured to the other end of said coil compression spring with a plurality of free spring coils between said rod and molded portion; and said second expansible chamber means including a cylinder and piston drivingly connected between said piston rod and frame having relative reciprocating movement in the longitudinal direction.
3. The system of claim 2, including a guide cylinder longitudinally aligned with said cylinder of said second expansible chamber means and guidingly receiving therein the free coils of said compression spring; and said molded portion of said impact member being of an external diameter conforming to and smaller than the internal diameter of said spring guide chamber for reception therein.
4. The system of claim 3, wherein said impact member further includes a second guide cylinder larger in internal diameter than the internal diameter of said first guide cylinder, and being longitudinally aligned and adjacent to said first guide cylinder; a second coil spring substantially larger than said first coil compression spring and being guidingly received within said second guide cylinder; means providing a rigid abutment for the frame end of said second coil spring stationarily mounted with respect to said vehicle frame; an annular abutment member rigid with and surrounding an intermediate portion of the molded portion of said impact member forming an outer abutment for the outer end of said second coil spring; said annular abutment member being of a diameter corresponding to and smaller than said second guide cylinder for guiding reception therein; the outer portion of said molded portion of said projection extending forwardly from said annular abutment member through said bumper to its free terminal end substantially beyond said bumper; and said annular abutment member being spaced longitudinally inwardly of the adjacent surface of said bumper to provide a lost motion connection therebetween, and being of a size such that upon substantial inward movement of said bumper with respect to said frame, it will engage said bumper to drive said molded portion, first spring and second spring inwardly to correspondingly drive said piston inwardly for contracting said second expansible chamber.
5. A motor vehicle impact braking system, comprising: a motor vehicle frame having a longitudinal axis; a plurality of wheels rotatably mounted on said frame about axes generally perpendicular to said longitudinal axis to support the vehicle frame; a brake for at least one of said wheels; first expansible chamber means being expandible under fluid pressure to actuate said brake for braking the one vehicle wheel with respect to said frame; a bumper mounted on said vehicle frame at one longitudinal end thereof; a longitudinally extending impact member mounted for generally longitudinal movement with respect to said frame and bumper, and extending longitudinally beyond said bumper away from said frame to a terminal free end; second expansible chamber means drivingly connected between said frame and said impact member to pressurize fluid contained therein upon impact of said impact member terminal free end with an object having a relative longitudinal speed component with respect to said vehicle frame; fluid communication means interconnecting said first and second expansible chamber means so that contraction of said second expansible chamber means will expand said first expandible chamber means to actuate said wheel brake automatically in response to an impact having a longitudinal component of force applied to said impact member; a plurality of brake and first expansible chamber means respectively associated with a plurality of the vehicle wheels; a corresponding plurality of said impact member and second chamber means; a balancing fluid chamber being subdivided by a sealing piston into a first expansible subchamber and a second expansible subchamber, with movement of said piston in one direction contracting said first expansible subchamber and expanding said second expansible subchamber, and movement of said piston in the opposite direction contracting said second expansible subchamber and expanding said first expansible subchamber; and all of said second expansible chambers being in direct fluid communication with said first expansible subchamber, and all of said first expansible chambers being in direct fluid communication with said second expansible subchamber.
6. The system of claim 5, wherein there are two impact members equidistant from the frame longitudinal axis and extending longitudinally through said bumper.
7. The system of claim 5, including a second vehicle bumper mounted to said frame at the opposite longitudinal end from said first mentioned bumper; an additional impact member and additional second expansible chamber means associated with said second vehicle bumper substantially identical with said impact member and second chamber means associated with said first mentioned vehicle bumper; and said vehicle having at least four wheels mounted for rotation about respective axes perpendicular to said longitudinal frame axis and each being provided with a brake having a first expansible chamber actuated by said fluid communication means and any one of said second expansible chambers.
8. The system of claim 5, wherein said balancing fluid chamber includes a first cylindrical member having opposed outer annular flanges; identical end cap members having internal cylindrical diameters identical with said first cylindrical member internal diameter, and outer annular flanges at their open ends sealingly secured to respective annular flanges of said first cylindrical member; and said cap members further having radially extending fluid coupling fittings for receiving the appropriate ends of fluid lines connected to respective ones of said first and second expansible chambers to form said fluid communication means.
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