JPS5938157U

JPS5938157U - Automatic transmission parking device

Info

Publication number: JPS5938157U
Application number: JP13475282U
Authority: JP
Inventors: 正男山本
Original assignee: トヨタ自動車株式会社
Priority date: 1982-09-04
Filing date: 1982-09-04
Publication date: 1984-03-10

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図はこの考案の一実施例を示し、第１図は自動変速機の
トランスミッション部の横断面図、第２図は第１図を側
面から見た作用説明図、第３図はソレノイドの要部の断
面を示す正面図、第４図はカットバックバルブ部のバル
ブボデーの断面図（第１、第２油圧スイツチも断面で示
す。）、第５図はソレノイド、第１、第２油圧スイツチ
の配線図である。１・・・トランスミッションケース、２・・・フロント
プラネタリリングギヤ、４・・・パーキングロックポー
ル、１０・・・バルブボデー、１０ａ・・・スロットル
圧油通路、１０ｂ・・・ガバナ圧油通路、１２・・・ソ
レノイド、１８・・・第１油圧スイツチ、２３・・・第
２油圧スイツチ。The figure shows one embodiment of this invention. Figure 1 is a cross-sectional view of the transmission section of an automatic transmission, Figure 2 is an explanatory diagram of the operation of Figure 1 seen from the side, and Figure 3 is the main part of the solenoid. Figure 4 is a cross-sectional view of the valve body of the cutback valve section (the first and second hydraulic switches are also shown in cross-section), and Figure 5 is a cross-sectional view of the solenoid and the first and second hydraulic switches. This is a wiring diagram. DESCRIPTION OF SYMBOLS 1... Transmission case, 2... Front planetary ring gear, 4... Parking lock pole, 10... Valve body, 10a... Throttle pressure oil passage, 10b... Governor pressure oil passage, 12... ... Solenoid, 18... First hydraulic switch, 23... Second hydraulic switch.

Claims

[Scope of utility model registration request]

It has a passage for throttle pressure oil whose pressure changes according to the opening degree of the throttle valve and a passage for governor pressure oil whose pressure changes according to the vehicle speed. In an automatic transmission that parks a vehicle by locking a front rejigging gear, a first hydraulic switch is turned on when the oil pressure in the throttle pressure oil passage decreases, and a first oil pressure switch is turned on when the oil pressure in the governor pressure oil passage decreases. a second hydraulic switch, - said first hydraulic switch;
, when the second hydraulic switch is turned on at the same time, the parking lock ball is engaged with the front ring gear, and the first and second hydraulic switches are turned on.
A parking device comprising: a solenoid that releases the parking lock ball from the front ring gear when any one of the second hydraulic switches is turned off.