JPH0471784U - - Google Patents
Info
- Publication number
- JPH0471784U JPH0471784U JP11412490U JP11412490U JPH0471784U JP H0471784 U JPH0471784 U JP H0471784U JP 11412490 U JP11412490 U JP 11412490U JP 11412490 U JP11412490 U JP 11412490U JP H0471784 U JPH0471784 U JP H0471784U
- Authority
- JP
- Japan
- Prior art keywords
- pump
- discharge volume
- link
- fixed
- variable
- 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
- 238000006073 displacement reaction Methods 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は、本考案に係る油圧とポンプ駆動トル
クとの関係を示す特性図、第２図は従来方式の油
圧配管図、第３図と第５図は従来方式の油圧とポ
ンプ駆動トルクとの関係特性図、また、第４図は
従来技術の別方式と本考案に係る油圧配管図の部
分要図である。
１，２，３……ポンプ、４……エンジン、５，
６，７……ピストン、８……リンク、９……スプ
リング、１０，１１……ポンプ制御レバー、１２
……操作弁。
Figure 1 is a characteristic diagram showing the relationship between oil pressure and pump drive torque according to the present invention, Figure 2 is a hydraulic piping diagram of the conventional system, and Figures 3 and 5 are the relationship between oil pressure and pump drive torque of the conventional system. FIG. 4 is a partial schematic diagram of a hydraulic piping diagram according to another method of the prior art and the present invention. 1, 2, 3...Pump, 4...Engine, 5,
6, 7... Piston, 8... Link, 9... Spring, 10, 11... Pump control lever, 12
...Operation valve.
Claims (1)
合わせて使用する油圧駆動装置において、各ポン
プの油圧をそれぞれ対応したポンプ制御用ピスト
ンに作用させて発生する油圧力の合力をリンクの
一端に加え、さらにリンクの他端はスプリングを
装着し、油圧力とスプリング力が釣合う状態にリ
ンク位置を係止することによつて、リンクに軸着
したポンプ制御レバー位置を規制して可変吐出量
型ポンプの吐出量を決定する構造を備えるととも
に、固定吐出量型ポンプを作動させないときには
、可変吐出量型ポンプの駆動トルクの最大値をエ
ンジン定格トルムと同等、あるいはやや低い値に
設定し、さらに固定吐出量型ポンプを作動したと
きには、可変吐出量型ポンプと固定吐出量型ポン
プの駆動トルクを合算した最大値をエンジン最大
トルクよりもやや低い値い設定したことを特徴と
する油圧駆動装置。 In a hydraulic drive system that uses a combination of a variable displacement pump and a fixed displacement pump, the hydraulic pressure of each pump is applied to the corresponding pump control piston, and the resultant force of the hydraulic pressure is applied to one end of the link. In addition, a spring is attached to the other end of the link, and by locking the link position in a state where hydraulic pressure and spring force are balanced, the position of the pump control lever pivoted on the link is regulated to create a variable discharge type. In addition to having a structure that determines the pump's discharge volume, when the fixed discharge volume pump is not in operation, the maximum value of the drive torque of the variable discharge volume pump is set to a value equal to or slightly lower than the engine rated torque, and further fixed. A hydraulic drive device characterized in that when the discharge volume pump is operated, the maximum value of the sum of the driving torques of the variable discharge volume pump and the fixed discharge volume pump is set to a value slightly lower than the engine maximum torque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11412490U JPH0754632Y2 (en) | 1990-10-31 | 1990-10-31 | Hydraulic drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11412490U JPH0754632Y2 (en) | 1990-10-31 | 1990-10-31 | Hydraulic drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0471784U true JPH0471784U (en) | 1992-06-25 |
| JPH0754632Y2 JPH0754632Y2 (en) | 1995-12-18 |
Family
ID=31861782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11412490U Expired - Lifetime JPH0754632Y2 (en) | 1990-10-31 | 1990-10-31 | Hydraulic drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754632Y2 (en) |
-
1990
- 1990-10-31 JP JP11412490U patent/JPH0754632Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754632Y2 (en) | 1995-12-18 |