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CVT with nested clutch and planetary output

A technology of continuously variable transmission and clutch, applied in the field of transmission system

Active Publication Date: 2017-03-29
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While PPV transmissions thus provide good running characteristics, they do so at the expense of space and complexity

Method used

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  • CVT with nested clutch and planetary output
  • CVT with nested clutch and planetary output
  • CVT with nested clutch and planetary output

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Embodiment Construction

[0015] The present invention relates to machines that require a transmission to link a power source with a final ground contact device such as wheels, tracks, etc., and / or another powered function or implement. Examples of such machines include machines used in mining, construction, farming, transportation, or any other industry known in the art. For example, the machine may be an earth moving machine such as a wheel loader, excavator, dump truck, backhoe loader, motor grader, material handler, and the like. Additionally, one or more implements may be connected to the machine for various tasks including, for example, loading, compacting, lifting, wiping, and may include, for example, buckets, compactors, fork lifts, brushes, grapples, Cutter, shears, blades, breakers / hammers, augers and other implements. In an exemplary embodiment, the system is suitable for use in a continuously variable transmission (CVT) such as may be used in wheel loaders, track tractors, or other suitab...

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PUM

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Abstract

The described systems and methods provide a full-range continuously variable transmission (101) having means for receiving rotation from a primary power source (103) and a secondary power source (105) such as a torque converter (201) Power input (102, 104). The first planetary gear group (402) includes first and second planetary gear sets (204, 205), and the input portion for receiving rotational power is connected with one or more of the first planetary gear set and the second planetary gear set group links. The second planetary gear set (403) includes a third planetary gear set (209) and a fourth planetary gear set (210), wherein a nested clutch having first and second selectable clutches (207, 208) is provided An assembly (404) to link the first planetary gear set with the second planetary gear set. Actuation of the first clutch holds the continuously variable transmission in a first speed range, and actuation of the second clutch holds the continuously variable transmission in a second speed range.

Description

technical field [0001] This patent disclosure relates generally to transmission systems for propulsion, and more particularly to hydrodynamic parallel path variator transmission systems having a compact and efficient layout. Background technique [0002] While various transmission systems have proven useful in construction machines and other industrial machines used to perform tasks and transfer materials, parallel path torque converter transmissions have been popular for their ability to provide continuously adjustable output with good efficiency. is widely adopted. In particular, parallel path torque converter (PPV) type transmissions provide the power and range required to allow the necessary tasks to be performed, while minimizing acquisition and operating costs and ensuring that performance and emissions standards can be met. [0003] Among the types of PPV-type transmissions, the common design element is usually a dual-input system in which a primary power source—such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H9/26F16H3/66F16D25/02
CPCF16H47/04F16H47/08F16H2037/0886F16H2200/2012F16H2200/2043
Inventor G·卡尔弗特
Owner CATERPILLAR INC