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Torque limited lube pump for power transfer devices

A technology of power transmission and pump chamber, applied in the direction of engine lubrication, lubrication pump, pressure lubrication of lubrication pump, etc., can solve the problems of insufficient supply and low efficiency of rotary pump.

Inactive Publication Date: 2011-05-18
MAGNA POWERTRAIN USA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although rotary pumps have found widespread use in lubrication systems, several disadvantages make undesired compromises in their function and construction
For example, most conventional rotary pumps are extremely inefficient and typically do not provide enough lubricant flow at low speeds and too much lubrication flow at high speeds

Method used

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  • Torque limited lube pump for power transfer devices
  • Torque limited lube pump for power transfer devices
  • Torque limited lube pump for power transfer devices

Examples

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Embodiment Construction

[0018] Referring now primarily to FIGS. 1 and 2 , there is shown the components of a torque limited, mechanically driven fluid pump, hereinafter referred to as a rotary pump 10 . In general, the rotary pump 10 is used in virtually any pump application that requires the delivery of a supply of fluid from the sump to a remote location to lubricate and / or cool rotating components. Generally, the rotary pump 10 includes a pump housing assembly 12 , a gerotor assembly 14 and a torque limiting mechanism 16 . In the illustrated embodiment, the rotary pump 10 is mounted in a power transmission unit 18 having a housing 20 and a shaft 22 supported in the housing 20 by a bearing assembly 24 so as to rotate about a first axis of rotation "A "Turn. The pump housing assembly 12 is shown to include a pump housing 26 and a cover plate 28 which together define a circular pump chamber 30 within which the internal gear assembly 14 is operatively disposed. The origin of the circular pump chambe...

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PUM

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Abstract

A lube pump is provided for supplying lubricant to various components of a power transmission unit of the type used in motor vehicles. The lube pump includes a pump assembly and a coupling mechanism for releaseably coupling the pump assembly to a driven shaft. The coupling is operable to release the pump assembly when the rotary speed of the shaft exceeds a threshold value.

Description

technical field [0001] The present invention relates generally to fluid pumps and, more particularly, to a limited torque fluid pump for a power transmission unit of the type installed in a motor vehicle. Background technique [0002] Fluid pumps are known for power transmission units of the type fitted into motor vehicles to supply lubricant to rotating drive components. Such powertrain units typically include manual and automatic transmissions and transaxles, four-wheel-drive transfer cases, and all-wheel-drive power transfer components. In many applications, the lube oil pump is a rotary pump having an eccentric outer rotor and an inner rotor that is fixed for rotation with a drive member such as a drive shaft. The inner rotor has outer lobes that engage and are biased relative to inner lobes formed on the outer rotor. These rotors are rotatably disposed in pressure chambers formed in a pump housing that is non-rotatably fixed within the power transmission unit. Rotati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D43/18
CPCF04C15/0061F04C2/102F04C2240/603F04C14/28F04C2270/035F04C2270/05F04C15/0073F04C14/06F04C2270/052F01C1/02F01M1/02F16N13/20
Inventor 阿伦·伦克伦道夫·C·威廉斯
Owner MAGNA POWERTRAIN USA