# US 11,299,042 B2 · Assembly for mounting a wheel to a portal gear box of an off-road vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,042 B2 - Document ID: US11299042B2 - Status: Granted - Kind: B2 - Application number: 17/406,522 - Filed: 2021-08-19 - Published: 2021-12-09 - Granted: 2022-04-12 - Earliest claimed: 2019-01-21 - Assignees: Super ATV, LLC - Applicants: Super ATV, LLC - Inventors: Jordan E. Stephan; Justin L. Eaton - Web page: https://patentgrep.com/patent/US11299042B2 ## CPC - B60K 17/043: {Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel} - B60K 17/22: characterised by arrangement, location, or type of main drive shafting, e.g. cardan shaft - F16H 57/028: characterised by means for reducing vibration or noise - B60Y 2200/20: Off-Road Vehicles - B60Y 2300/20: Reducing vibrations in the driveline - F16H 1/20: involving more than two intermeshing members - F16H 2057/02039: {Gearboxes for particular applications} - 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 - F16H: GEARING - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY ## Abstract A vibration-reducing portal box assembly for mounting a wheel of an off-road vehicle includes a housing with a receptacle adapted to receive a stock axle shaft of an off-road vehicle, an output shaft operably connectable to a stock axle received in the housing and effective to rotate upon rotation of said stock axle, and a wheel hub having a central opening adapted to receive said output shaft, and adapted to turn a wheel mounted to said wheel hub upon rotation of said output shaft. The output shaft has a tapered portion connecting its proximal end to its distal end. The wheel hub has a tapered portion adapted to matingly receive the tapered portion of the output shaft. The output shaft may be connected to the stock axle shaft by a geared linking mechanism. ## Claims ### Claim 1 A vibration-reducing portal box assembly for mounting a wheel of an off-road vehicle, comprising: a) a box housing having a receptacle adapted to receive a stock axle shaft of an off-road vehicle; b) an output shaft operably connectable to a stock axle received in said housing and effective to rotate upon rotation of said stock axle; wherein said output shaft has a proximal end portion having a first diameter, a distal end portion having a second, reduced, diameter, and a tapered portion connecting the proximal end portion to the distal end portion; wherein said tapered portion of said output shaft is angled at an angle of between about 8° and about 12° with respect to the adjacent proximal and distal end portions of the shaft; c) a wheel hub having a central opening adapted to receive said output shaft, and adapted to turn a wheel mounted to said wheel hub upon rotation of said output shaft; wherein the central opening of said wheel hub has a proximal end portion having a first diameter, and distal end portion having a second, reduced, diameter, and a tapered portion therebetween to matingly receive the tapered portion of the output shaft in a manner effective to join the hub and shaft together with improved concentricity and less run out; and wherein in the area where the diameter of the output shaft and the diameter of the wheel hub are reduced, the wheel hub supports the output shaft. ### Claim 2 (depends on 1) A vibration-reducing portal box assembly according to claim 1 wherein said output shaft is operably connectable to the stock axle shaft by a linking mechanism. ### Claim 3 (depends on 2) A vibration-reducing portal box assembly according to claim 2 wherein said linking mechanism comprises one or more gears. ### Claim 4 (depends on 3) A vibration-reducing portal box assembly according to claim 3 wherein said one or more gears comprises an input gear operably linked to said stock axle to rotate upon rotation of said stock axle, and an output gear operably linked to said input gear to rotate in the same direction as said stock axle. ### Claim 5 (depends on 4) A vibration-reducing portal box assembly according to claim 4 wherein said linking mechanism additionally comprises a linking gear. ### Claim 6 (depends on 5) A vibration-reducing portal box assembly according to claim 5 wherein said linking mechanism directly or indirectly connects the stock axle to the output shaft in a manner effective to cause the output shaft to rotate at a slower speed than the stock axle. ### Claim 7 (depends on 1) A vibration-reducing portal box assembly according to claim 1 wherein said tapered portion of said output shaft is angled at an angle of about 10° with respect to the adjacent proximal and distal end portions of the shaft. ### Claim 8 (depends on 1) A vibration-reducing portal box assembly according to claim 1 wherein at least a portion of the distal end of said output shaft is splined. ### Claim 9 (depends on 1) A vibration-reducing portal box assembly according to claim 1 wherein at least some of the central opening of said wheel hub is splined. ### Claim 10 (depends on 1) A vibration-reducing portal box assembly according to claim 1 wherein said assembly further includes an end of a stock axle received in said housing receptacle.