JPH0180856U - - Google Patents
Info
- Publication number
- JPH0180856U JPH0180856U JP1988038755U JP3875588U JPH0180856U JP H0180856 U JPH0180856 U JP H0180856U JP 1988038755 U JP1988038755 U JP 1988038755U JP 3875588 U JP3875588 U JP 3875588U JP H0180856 U JPH0180856 U JP H0180856U
- Authority
- JP
- Japan
- Prior art keywords
- charge
- hydraulic
- relief valve
- pressure
- main relief
- 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 4
- 238000009825 accumulation Methods 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 1
Landscapes
- Motor Power Transmission Devices (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Gearings (AREA)
Description
第１図は従来の油圧式動力伝達装置を示す回路
図、第２図は同装置における油圧ポンプの基本断
面図、第３図は同装置における油圧モータの基本
断面図、第４図は同装置におけるチヤージアンド
メーンリリーフバルブの断面図、第５図はこの考
案の好適実施例に係わる油圧式動力伝達装置のブ
ロツク回路図、第６図は同装置におけるチヤージ
アンドメーンリリーフバルブのシヤトルバルブス
プール内蔵部の断面図である。
１，２…油圧ポンプ、３，４…油圧モータ、１
２Ａ，１２Ｂ，１３Ａ，１３Ｂ…油圧回路、２０
，２１…チヤージアンドメーンリリーフバルブ、
２２…シヤトルバルブスプール、２４…チヤージ
ポンプ、２５…チヤージライン、３０…シンクロ
ナイジングライン、３１…シンクロナイジングバ
ルブ、４１，４２…ルブリケーシヨンバルブ、５
０，５１…オリフイス、５４，５５…アキユーム
レーテイングピストン。
Fig. 1 is a circuit diagram showing a conventional hydraulic power transmission device, Fig. 2 is a basic sectional view of a hydraulic pump in the same device, Fig. 3 is a basic sectional view of a hydraulic motor in the same device, and Fig. 4 is a basic sectional view of the same device. 5 is a block circuit diagram of a hydraulic power transmission device according to a preferred embodiment of this invention, and FIG. 6 is a shuttle valve spool of a charge and main relief valve in the same device. FIG. 3 is a cross-sectional view of the built-in part. 1, 2...Hydraulic pump, 3, 4...Hydraulic motor, 1
2A, 12B, 13A, 13B...Hydraulic circuit, 20
, 21...Charge and main relief valve,
22... Shuttle valve spool, 24... Charge pump, 25... Charge line, 30... Synchronizing line, 31... Synchronizing valve, 41, 42... Lubrication valve, 5
0,51...orifice, 54,55...accumulation piston.
Claims (1)
油圧ポンプ二基と、該ポンプのそれぞれの吐出圧
油で個々に駆動される左右フアイナルドライブ系
の油圧モータ二基と、該モータと前記油圧ポンプ
とを結ぶ左右ドライブ系のそれぞれにおける高低
圧二系統の油圧回路と、該回路に組込まれた左右
のチヤージアンドメーンリリーフバルブと、該バ
ルブを介して左右ドライブ系の前記油圧回路相互
を接続するシンクロナイジングラインと、該ライ
ンに組込まれたシンクロナイジングバルブと、チ
ヤージアンドメーンリリーフバルブにチヤージ圧
油を導入するためのチヤージラインとを備えると
共に車輛の低速走行時等に左右ドライブ系の油圧
回路で生じるドライブ圧力の変動を吸収するため
の手段を設けた油圧駆動車輛の動力伝達装置にお
いて、 上記ドライブ圧力の変動を吸収するための手段
が、チヤージアンドメーンリリーフバルブにおけ
るシヤトルバルブスプールの両端側シヨルダ部に
設けられてチヤンバ内に通じるオリフイスと、前
記チヤンバ内に設けられて常時前記スプール側に
付勢されたアキユームレーテイングピストンとの
組合せからなつて、ドライブ圧力の変動に対する
前記バルブスプールの応答時間を遅らせることを
特徴とする油圧駆動車輛の動力伝達装置。[Scope of Claim for Utility Model Registration] Two left and right drive type hydraulic pumps driven by the power of the engine, and two left and right final drive type hydraulic motors that are individually driven by the pressure oil discharged from each of the pumps, A hydraulic circuit with two high and low pressure systems in each of the left and right drive systems connecting the motor and the hydraulic pump, a left and right charge and main relief valve built into the circuit, and a charge and main relief valve in the left and right drive systems connected to the motor and the hydraulic pump. It is equipped with a synchronizing line that connects the hydraulic circuits, a synchronizing valve built into the line, and a charge line that introduces charge pressure oil to the charge and main relief valve, and when the vehicle is running at low speed, etc. In a power transmission system for a hydraulically driven vehicle that is equipped with a means for absorbing the fluctuations in drive pressure that occur in the hydraulic circuits of the left and right drive systems, the means for absorbing the fluctuations in drive pressure is a charge and main relief valve. The drive pressure is controlled by a combination of orifices that are provided in the shoulder portions on both ends of the shuttle valve spool and communicate with the chamber, and an accumulation piston that is provided in the chamber and is always urged toward the spool. A power transmission system for a hydraulically driven vehicle, characterized in that the response time of the valve spool to fluctuations is delayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988038755U JPH0517504Y2 (en) | 1988-03-24 | 1988-03-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988038755U JPH0517504Y2 (en) | 1988-03-24 | 1988-03-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0180856U true JPH0180856U (en) | 1989-05-30 |
| JPH0517504Y2 JPH0517504Y2 (en) | 1993-05-11 |
Family
ID=31265294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988038755U Expired - Lifetime JPH0517504Y2 (en) | 1988-03-24 | 1988-03-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0517504Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952514A (en) * | 1975-02-20 | 1976-04-27 | Caterpillar Tractor Co. | Underspeed actuator for hydrostatic transmission |
-
1988
- 1988-03-24 JP JP1988038755U patent/JPH0517504Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0517504Y2 (en) | 1993-05-11 |
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