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Automatic Transmission

A technology of automatic transmission and speed change mechanism, which is applied in the direction of transmission, transmission parts, gear lubrication/cooling, etc., can solve problems such as deterioration of sound and vibration performance, and achieve the effect of suppressing deterioration.

Active Publication Date: 2022-05-03
JATCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Therefore, when an electric oil pump is attached to the outer periphery of the gearbox, the sound and vibration performance will deteriorate with the distance from the node where the power equipment resonates and the weight of the electric oil pump itself.

Method used

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Examples

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Embodiment Construction

[0073] Hereinafter, an embodiment of the present invention will be described by taking the case of being applied to a belt-type continuously variable transmission (hereinafter, referred to as an automatic transmission) as an example.

[0074] figure 1 It is a diagram schematically showing the arrangement of each constituent element of the automatic transmission 1 in the transmission case 10 . In addition, in figure 1 In , the speed change mechanism 2 , the gear set 6 , the final drive gear 7 , and the differential device 8 arranged in the transmission case 10 are briefly shown by phantom lines.

[0075] figure 2 is a diagram illustrating the arrangement of the electric oil pump 21 and the transmission controller 9 (ATCU) of the transmission 10, wherein figure 2 (a) is figure 1 The enlarged view around the electric oil pump 21 of the gearbox 10. figure 2 (b) is figure 2 (a) is the perspective view which looked at the transmission case 10 from the direction of the a...

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PUM

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Abstract

An automatic transmission that suppresses deterioration in acoustic vibration performance. The automatic transmission (1) has: an oil cooler (20), an electric oil pump (21), and a transmission mechanism (2). The transmission mechanism has a primary pulley (3), a secondary pulley (4), and a power transmission member (5) wound around the primary pulley and the secondary pulley. When viewed from the direction of the rotation axis (X1), the vertical line (V1) passing through the shaft center of the primary pulley, which is the rotation shaft (X1), is located on the vertical line (V2) passing through the shaft center of the secondary pulley, which is the rotation shaft (X2). ) and the oil cooler. The vertical line (V1) passing through the rotation axis (X1) of the primary pulley is located between the vertical line (V2) passing through the shaft center rotation axis (X2) of the secondary pulley (4) and the electric oil pump. The end (21a) of the electric oil pump (21) on the primary pulley (3) side is arranged closer to the primary pulley (3) than the end (20a) of the oil cooler (20) on the primary pulley (3) side s position.

Description

technical field [0001] The present invention relates to an automatic transmission. Background technique [0002] Patent Document 1 discloses an automatic transmission in which an electric oil pump is attached to the outer periphery of the transmission. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2005-98338 [0004] In a belt-type continuously variable transmission (CVT) for a vehicle, resonance (power plant resonance) between a drive source and the CVT occurs. The farther away from the nodes (nodes) where the power equipment resonates, the greater the degree of resonance. In a CVT, the node of power plant resonance is the primary pulley shaft. [0005] Therefore, in the CVT, the farther an object is arranged from the primary pulley shaft, the greater the vibration due to resonance, and the greater the degree of noise (sound power level) due to the vibration. [0006] Such as Figure 7 As shown, when the electric oil pump 21 attached to the transmission 10 i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H37/02F16H57/04F16H57/028
CPCF16H37/02F16H57/028F16H57/0404F16H57/0413F16H57/0436F16H7/02F16H7/20F16H57/0424F16H57/0435
Inventor 汤川洋久山下胜则
Owner JATCO LTD