JPH0317468U - - Google Patents
Info
- Publication number
- JPH0317468U JPH0317468U JP1989078069U JP7806989U JPH0317468U JP H0317468 U JPH0317468 U JP H0317468U JP 1989078069 U JP1989078069 U JP 1989078069U JP 7806989 U JP7806989 U JP 7806989U JP H0317468 U JPH0317468 U JP H0317468U
- Authority
- JP
- Japan
- Prior art keywords
- speed motor
- pressure oil
- pump
- regulator
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Control Of Fluid Gearings (AREA)
Description
第１図はこの考案にかかる変速装置をそなえた
走行用回路図、第２図はこの考案の変速装置をそ
なえたホイールローダのけん引力−走行速度線図
、第３図は従来技術の変速装置をそなえた走行用
回路図、第４図は従来技術の変速装置をそなえた
ホイールローダのけん引力−走行速度線図である
。
１……１速段位置、２……２速段位置、Ｄ……
Ｄモード段位置、３，３′……主回路、５……可
変ポンプ、８……チヤージングポンプ、９……メ
ータリングオリフイス、１０……２速モータ、１
１，６……レギユレータ、１２……１，２速切換
弁、１３……パイロツト切換弁、１６，３６……
操作レバー部、３３……電磁開閉弁。
Fig. 1 is a traveling circuit diagram equipped with a transmission according to this invention, Fig. 2 is a traction force-traveling speed diagram of a wheel loader equipped with a transmission according to this invention, and Fig. 3 is a transmission according to the prior art. FIG. 4 is a traction force-traveling speed diagram of a wheel loader equipped with a conventional transmission. 1...1st gear position, 2...2nd gear position, D...
D mode stage position, 3, 3'...Main circuit, 5...Variable pump, 8...Charging pump, 9...Metering orifice, 10...2-speed motor, 1
1, 6... Regulator, 12... 1st and 2nd speed switching valve, 13... Pilot switching valve, 16, 36...
Operation lever part, 33...Solenoid on-off valve.
Claims (1)
り駆動される走行用２速モータと、上記可変ポン
プから２速モータに圧油を供給する前進流れ側油
路と、２速モータから可変ポンプに圧油を戻すた
めの後進流れ側油路とから主回路が構成され、チ
ヤージングポンプからの圧油をメータリングオリ
フイスを介して２速モータ用レギユレータに作用
せしめるようにし、変速レバー部の１・２速段切
換スイツチの操作により２速モータを変速させる
ようにした走行用回路において、上記チヤージン
グポンプの吐出側にメータリングオリフイスと並
列に電磁開閉弁を設け、一方、変速レバー部の１
・２速段切換スイツチにＤモード段を追加して設
け、上記変速レバー部を１速段に切換えたときに
はチヤージングポンプからの圧油を上記メータリ
ングオリフイスおよび電磁開閉弁を介して２速モ
ータ用レギユレータの大容量側ポートと、可変ポ
ンプ用レギユレータにそれぞれ作用せしめるよう
にし、また２速段に切換えたときにはチヤージン
グポンプからの圧油をメータリングオリフイスを
介して２速モータ用レギユレータの大容量側ポー
トと、可変ポンプ用レギユレータにそれぞれ作用
せしめるようにし、またＤモード段に切換えたと
きにはチヤージングポンプからの圧油をメータリ
ングオリフイスを介して２速モータ用レギユレー
タの小容量側ポートと、可変ポンプ用レギユレー
タに作用せしめるように構成したことを特徴とす
る作業車両の走行用変速装置。 A variable pump, a 2-speed motor for traveling driven by pressure oil from the variable pump, a forward flow side oil passage that supplies pressure oil from the variable pump to the 2-speed motor, and a forward flow side oil passage that supplies pressure oil from the 2-speed motor to the variable pump. The main circuit is composed of the reverse flow side oil passage for returning oil, and the pressure oil from the charging pump is made to act on the regulator for the 2-speed motor via the metering orifice, and In a driving circuit in which the speed of a two-speed motor is changed by operating a gear changeover switch, an electromagnetic on-off valve is provided on the discharge side of the charging pump in parallel with the metering orifice, and one
・A D mode gear is added to the 2nd gear shift switch, and when the shift lever section is switched to the 1st gear, the pressure oil from the charging pump is transferred to the 2nd gear motor via the metering orifice and the electromagnetic on-off valve. When switching to 2nd speed, the pressure oil from the charging pump is transferred to the large capacity side port of the 2nd speed motor regulator through the metering orifice. When switching to the D mode stage, the pressure oil from the charging pump is connected to the small capacity side port of the 2-speed motor regulator through the metering orifice, and the variable pump is operated on the small capacity side port of the two-speed motor regulator. A transmission for driving a work vehicle, characterized in that it is configured to act on a pump regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989078069U JPH0724701Y2 (en) | 1989-06-30 | 1989-06-30 | Transmission for traveling of work vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989078069U JPH0724701Y2 (en) | 1989-06-30 | 1989-06-30 | Transmission for traveling of work vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0317468U true JPH0317468U (en) | 1991-02-21 |
| JPH0724701Y2 JPH0724701Y2 (en) | 1995-06-05 |
Family
ID=31621021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989078069U Expired - Lifetime JPH0724701Y2 (en) | 1989-06-30 | 1989-06-30 | Transmission for traveling of work vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724701Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008082537A (en) * | 2006-08-30 | 2008-04-10 | Kobelco Cranes Co Ltd | Hydraulic travel drive device |
-
1989
- 1989-06-30 JP JP1989078069U patent/JPH0724701Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008082537A (en) * | 2006-08-30 | 2008-04-10 | Kobelco Cranes Co Ltd | Hydraulic travel drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0724701Y2 (en) | 1995-06-05 |
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