JPH02109067U

JPH02109067U -

Info

Publication number: JPH02109067U
Application number: JP1832689U
Authority: JP
Priority date: 1989-02-17
Filing date: 1989-02-17
Publication date: 1990-08-30

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図はバネ支持杆２０の斜視図
である。３……変速カム、３ａ……ブレーキ連動カム、
３ｂ……斜板回動カム、３ｃ……中立保持カム、
４……中立保持アーム、５……付勢杆、７……中
立付勢バネ、８……可動ポンプ斜板、１５……変
速操作軸、１６……ブレーキ操作軸、１７……ブ
レーキ中間軸、１８……ポンプ斜板調整軸、２０
……バネ支持杆、２６……ケース側バネ受、２７
……固定バネ受。 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. The figure is a perspective view of the spring support rod 20. 3... Speed cam, 3a... Brake interlocking cam,
3b... Swash plate rotating cam, 3c... Neutral holding cam,
4... Neutral holding arm, 5... Biasing rod, 7... Neutral biasing spring, 8... Movable pump swash plate, 15... Speed change operating shaft, 16... Brake operating shaft, 17... Brake intermediate shaft , 18...Pump swash plate adjustment shaft, 20
... Spring support rod, 26 ... Case side spring holder, 27
...Fixed spring holder.

Claims

[Scope of Claim for Utility Model Registration] (1) The rotation of the speed change cam 3 fixed to the speed change operation shaft 15 rotates the swash plate rotation arm 30 and rotates the movable pump swash plate 8 of the hydraulic pump P, thereby increasing the hydraulic pressure. Motor M
and differential gear device D via the power transmission system.
In the configuration, a neutral holding cam 3c is provided on the speed change cam 3, and a neutral holding arm 4 pivotably supports a neutral holding roller 33 that is in contact with the neutral holding cam 3c.
is fixed to the neutral holding arm pivot shaft 25, and a neutral biasing spring 7 that acts on the neutral holding arm 4 so that the neutral holding arm 4 biases the speed change cam 3 toward the neutral position is connected to the neutral holding arm 4 from the hydraulic motor M. An HST type axle drive device characterized by being arranged in parallel with a power transmission system to a differential gear device D. (2) The biasing rod 5 according to claim (1) has one end pivoted to the neutral holding arm 4, and the other end is in a free state and externally fits the neutral biasing spring 7 through the spring receiver 27. An HST type axle characterized in that a spring support rod 20 is loosely fitted to the outer periphery of the middle part of the neutral biasing spring 7, and the end of the neutral biasing spring 7 on the side of the neutral holding arm 4 is fixed in position by a case side spring receiver 26. Drive device. (3) Neutral holding arm pivot shaft 25 according to claim (1)
and the neutral holding arm 4 are integrated, the neutral holding arm pivot shaft 25 is rotatable together with the rotation of the neutral holding arm 4, and the switch operation arm 56 is fixed to the neutral holding arm pivot shaft 25. An HST type axle drive device characterized in that a neutral confirmation switch 55 is operated by a switch operation arm 56.