公开(公告)号：US09771929B2

公开(公告)日：2017-09-26

申请号：US14268746

申请日：2014-05-02

Applicant: Caterpillar Inc.

Inventor： Marek Golebiowski ,  Christopher W. Pruess

IPC: F04B1/22 ,  F04B1/20 ,  F04B27/08 ,  F16C17/02 ,  F01B3/00 ,  F16C19/50 ,  F03C1/06 ,  F04B1/14

CPC classification number: F04B1/2085 ,  F01B3/0073 ,  F03C1/0671 ,  F04B1/148 ,  F04B1/22 ,  F04B27/0865 ,  F16C17/02 ,  F16C19/502 ,  F16C2240/60

Abstract: In a piston pump assembly, cradle bearings support a swash plate on an inner surface of a housing assembly. The cradle bearing and/or the corresponding portion of the housing inner surface may have undercut portions allowing deflection of an inward portion of the cradle bearing when the swash plate is subjected to pressure forces from hydraulic fluid compressed within pump cylinders by the pump pistons. Deflection of the cradle bearings allows increased contact pressure to be further distributed across the engaging surfaces of the swash plates and the cradle bearings.

公开(公告)号：US11920677B2

公开(公告)日：2024-03-05

申请号：US17590273

申请日：2022-02-01

Applicant: Caterpillar Inc.

Inventor： Christopher W. Pruess ,  Aaron B. Crabtree ,  Jeremiah C Johnson

IPC: F16H61/4104 ,  F16H57/04 ,  F16H61/4139 ,  F16H61/4165

CPC classification number: F16H61/4104 ,  F16H57/0408 ,  F16H57/0412 ,  F16H61/4139 ,  F16H61/4165

Abstract: A system including a gearbox and a hydraulic machine connected by a working fluid circuit. The gearbox including a gearbox housing having first and second gearbox fluid passages integrated into the gearbox housing. The hydraulic machine including a case having first and second hydraulic machine fluid passages, the first and second hydraulic machine fluid passages being integrated into the case. A set of rotating elements enclosed within the case. The first gearbox fluid passage and the first hydraulic machine fluid passage align to form a feed passage to conduct fluid at a first pressure from a first source to the set of rotating elements. The second gearbox fluid passage and the second hydraulic machine fluid passage align to form a charge passage to conduct fluid at a second pressure from a second source to the set of rotating elements. The first pressure being less than the second pressure.

公开(公告)号：US20150316040A1

公开(公告)日：2015-11-05

申请号：US14268746

申请日：2014-05-02

Applicant: Caterpillar Inc.

Inventor： Marek Golebiowski ,  Christopher W. Pruess

IPC: F04B1/14

CPC classification number: F04B1/2085 ,  F01B3/0073 ,  F03C1/0671 ,  F04B1/148 ,  F04B1/22 ,  F04B27/0865 ,  F16C17/02 ,  F16C19/502 ,  F16C2240/60

Abstract: In a piston pump assembly, cradle bearings support a swash plate on an inner surface of a housing assembly. The cradle bearing and/or the corresponding portion of the housing inner surface may have undercut portions allowing deflection of an inward portion of the cradle bearing when the swash plate is subjected to pressure forces from hydraulic fluid compressed within pump cylinders by the pump pistons. Deflection of the cradle bearings allows increased contact pressure to be further distributed across the engaging surfaces of the swash plates and the cradle bearings.

Abstract translation: 在活塞泵组件中，支架轴承支撑在壳体组件的内表面上的斜盘。 托架轴承和/或壳体内表面的相应部分可以具有底切部分，当斜盘受到泵活塞在泵缸内压缩的液压流体的压力时，能够使托架轴承的向内部分偏转。 支架轴承的偏转允许增加的接触压力进一步分布在斜盘和摇篮轴承的接合表面上。