JPH02109065U

JPH02109065U -

Info

Publication number: JPH02109065U
Application number: JP1832889U
Authority: JP
Priority date: 1989-02-17
Filing date: 1989-02-17
Publication date: 1990-08-30
Anticipated expiration: 2004-02-17
Also published as: JP2518518Y2

Description

[Brief explanation of drawings]

第１図はＨＳＴ式車軸駆動装置の平面断面図、
第２図は第１図のＡ−Ａ矢視断面図、第３図は第
１図のＢ−Ｂ矢視断面図、第４図は第１図のＣ−
Ｃ矢視断面図、第５図は第１図のＤ−Ｄ矢視断面
図、第６図は上部ケース１ａに軸受支持した各軸
に沿つた展開断面図、第７図は中立確認スイツチ
５５部分の平面図、第８図はＨＳＴ式変速装置が
中立状態の変速カム３と中立保持カム４の平面図
、第９図は変速状態の変速カム３と中立保持カム
４の平面図、第１０図は油路板２に設けたチエツ
クバルブの部分の前面断面図、第１１図は同じく
平面断面図、第１２図はバイパス押圧体６５とバ
イパス操作アーム６８の部分の斜視図、第１３図
は油路板２の斜視図、第１４図はＨＳＴ式変速装
置の中立位置を拡大する為のシヤトルバルブ６１
の部分の断面図である。１……ミツシヨンケース、２……油路板、２ｆ
，２ｇ……水平油路、２ｍ，２ｎ……半月形油路
、２ｓ，２ｔ……半月形油路、７０，７１……チ
エツクバルブ、７２，７３……チエツクバルブ座
、７４，７５……バルブ開閉杆、７６，７７……
摺動ガイド、６７……バイパス操作アーム軸、６
８……バイパス操作アーム。 Figure 1 is a cross-sectional plan view of the HST type axle drive device.
Figure 2 is a sectional view taken along the line A-A in Figure 1, Figure 3 is a sectional view taken along the line B-B in Figure 1, and Figure 4 is a sectional view taken along the line C--
5 is a sectional view taken along the line D-D in FIG. FIG. 8 is a plan view of the shift cam 3 and neutral holding cam 4 when the HST type transmission is in the neutral state; FIG. 9 is a plan view of the shifting cam 3 and neutral holding cam 4 when the HST transmission is in the shifting state; The figure is a front cross-sectional view of the check valve provided on the oil passage plate 2, FIG. A perspective view of the oil passage plate 2, FIG. 14 shows a shuttle valve 61 for enlarging the neutral position of the HST type transmission.
FIG. 1...Mission case, 2...Oil road plate, 2f
, 2g...Horizontal oil passage, 2m, 2n...Half-moon oil passage, 2s, 2t...Half-moon oil passage, 70, 71...Check valve, 72, 73...Check valve seat, 74, 75... Valve opening/closing rod, 76, 77...
Sliding guide, 67... Bypass operation arm shaft, 6
8...Bypass operation arm.

Claims

[Scope of claim for utility model registration] (1) Two half-moon-shaped oil passages 2s, 2 of hydraulic pump P
t, two half-moon-shaped oil passages 2 m for the hydraulic motor M,
Horizontal oil passages 2f and 2g communicating with 2n are connected to the oil passage plate 2.
The check valve seats 72, 73 are inserted into the open ends of the horizontal oil passages 2f, 2g, and the check valves 70, 71 are inserted into the check valve seats 72, 73.
and valve opening/closing rods 74, 75 are arranged, the wide bypass pressing body 65 is slid along the sliding guides 76, 77 configured in the case 1 by rotating the vertical shaft protruding outside the case 1. so that the bypass pressing body 65 is connected to the left and right valve opening/closing rods 74,
H characterized by being configured so as to be in contact with both 75 and 75.
ST type transmission. (2) The tips of the sliding guides 76, 77 according to claim (1) are brought into contact with the check valve seats 72, 73,
Check valve seat 72 from horizontal oil passages 2f and 2g
, 73 is prevented from coming off.
type transmission.