US 12,473,913 B2
Hydraulic pump unit having knurled connection of a pillow block to a housing
Maximilian Haas, Bühl (DE)
Assigned to Schaeffler Technologies AG & CO. KG, Herzogenaurach (DE)
Appl. No. 18/567,813
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed May 2, 2022, PCT No. PCT/DE2022/100327
§ 371(c)(1), (2) Date Dec. 7, 2023,
PCT Pub. No. WO2022/258099, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 10 2021 114 712.3 (DE), filed on Jun. 8, 2021.
Prior Publication US 2024/0271619 A1, Aug. 15, 2024
Int. Cl. F04C 2/18 (2006.01); F01C 21/10 (2006.01)
CPC F04C 2/18 (2013.01) [F01C 21/10 (2013.01); F04C 2240/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydraulic pump unit, comprising:
a pump,
at least one pillow block for mounting the pump, and
a housing having a corresponding receptacle for each one of the at least one pillow block, and
the corresponding receptacle including a first region having a first length, the first region shaped as a blind hole, and
the at least one pillow block including a second region having a second length smaller than the first length, and
the second region of the at least one pillow block is received by the first region of the corresponding receptacle, and
a circumference of the second region of the at least one pillow block has a peripheral knurl extending at least over a portion of the second length, the peripheral knurl pressed into the first region so as to rotationally fix the at least one pillow block to the housing.