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Transmission parking mechanism

A technology for transmissions and brakes, applied in vehicle transmissions, mechanical equipment, vehicle components, etc., can solve problems such as poor precision, rising transmission costs, and restrictions on transmission miniaturization, reducing manufacturing costs, the number of parts, and assembly processes. Effect

Inactive Publication Date: 2011-11-30
JATCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing parking mechanism is composed of multiple components such as parking gears, pawls (parking levers), levers, and cams. Therefore, the manufacturing cost of the transmission increases due to these components.
In addition, due to these parts, the miniaturization of the transmission is limited
[0006] In addition, when the parking mechanism has poor precision, the parking lever cannot be disengaged from the parking gear, and the parking lever cannot be engaged with the parking gear, so that it cannot be in a parking state.
Therefore, high machining accuracy is required for the parts, which causes the cost of the transmission to rise.

Method used

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0037] figure 1 It is an explanatory diagram of the vehicle reduction gear transmission 10 according to the first embodiment of the present invention.

[0038] The vehicle speed reduction device 10 is composed of an electric motor (motor) 20 as a driving force source, a transmission 30 including a planetary gear mechanism 31 , and a final reduction mechanism 50 that outputs reduced driving force to an axle.

[0039] The electric motor (motor) 20 is rotated by supplying electric power from the control device 21 to generate driving force. The motor 20 is constituted by, for example, a brushless motor having three phases. The control device 21 supplies electric power to the motor 20 through, for example, PWM control of the inverter, thereby controlling the driving force of the motor 20 .

[0040] In addition, the control device 21 instructs the control circuit 23 to eng...

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PUM

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Abstract

A parking mechanism of a transmission (30) with a planetary gear mechanism (31) for speed changing and outputting the rotation of a driving force source (20), includes a plurality of friction elements (33,34) which change a speed ratio of the planetary gear mechanism by being engaged or released; and an engaging unit which engages the friction elements. The engaging unit maintains at least two interlock friction elements, which are engaged to interlock the transmission, out of the plurality of friction elements in engaged states when the operation of the driving force source stops due to a key-off operation.

Description

technical field [0001] The present invention relates to a parking mechanism mounted in a transmission of a vehicle. Background technique [0002] A transmission mounted on a vehicle includes a parking mechanism that restricts rotation of an output shaft to maintain the vehicle in a stopped state. [0003] As a conventional parking mechanism, there is known an automatic transmission parking mechanism in which a cam is moved by a cammed lever interlocked with a shift lever, thereby engaging a pawl with a parking gear provided in a transmission to lock the vehicle. . (Refer to Patent Document 1). [0004] Patent Document 1: (Japanese) Unexamined Patent Publication No. 58-207578 [0005] A conventional parking mechanism is composed of a plurality of components such as a parking gear, a pawl (parking lever), a lever, and a cam. Therefore, the manufacturing cost of the transmission increases due to these components. In addition, due to these parts, the miniaturization of the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/44
CPCF16H63/3043F16H61/686F16H2063/3056F16H63/3026F16H2200/0034F16H3/663F16H61/0059F16H2200/2023F16H63/345F16H2200/0021F16H2063/3066F16H2063/3033F16H2200/2035F16H63/36
Inventor 海野刚弘出渕耕司小林克也中野裕介
Owner JATCO LTD