JPS6337746B2 - - Google Patents
Info
- Publication number
- JPS6337746B2 JPS6337746B2 JP56197307A JP19730781A JPS6337746B2 JP S6337746 B2 JPS6337746 B2 JP S6337746B2 JP 56197307 A JP56197307 A JP 56197307A JP 19730781 A JP19730781 A JP 19730781A JP S6337746 B2 JPS6337746 B2 JP S6337746B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic chamber
- input
- output
- spool
- annular groove
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Description
【発明の詳細な説明】
この発明は、油圧式倍力装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulic booster.
例えば建設機械等において、従来のこの種の油
圧式倍力装置としては、オペレータへの反力を生
じさせるためピストン両側の差圧をブースタ出力
とするものがあるが、所望の力を得るためには大
きなピストン断面積を必要とする。また、ポペツ
ト弁やボールを内蔵したものは構造が複雑になる
欠点がある。 For example, in construction machinery, etc., there is a conventional hydraulic booster of this type that uses the differential pressure on both sides of the piston as a booster output in order to generate a reaction force on the operator, but in order to obtain the desired force, requires a large piston cross-sectional area. Also, those with a built-in poppet valve or ball have the disadvantage of having a complicated structure.
この発明は、このような欠点を解消すべく提案
されたもので、その目的は比較的簡単な構成でオ
ペレータへ反力を伝えることができ、かつ油圧回
路故障時にもブレーキを作動させることのできる
油圧式倍力装置を提供することにある。 This invention was proposed to eliminate these drawbacks, and its purpose is to be able to transmit reaction force to the operator with a relatively simple configuration, and to be able to operate the brake even in the event of a hydraulic circuit failure. The purpose of the present invention is to provide a hydraulic booster.
以下、この発明を図示する一実施例に基づいて
説明する。第１図に示すように、シリンダチユー
ブ２とカバー３，４とによりハウジング１が形成
され、このハウジング１内に出力スリーブ５が軸
方向に摺動自在に設けられ、これによりハウジン
グ１の出力側に中間油圧室６、入力側に戻り側油
圧室７が形成される。このようなハウジング１の
入力側端部にはタンクへ通じる戻りポート８、中
央部にはポンプへ通じる給油ポート９が設けられ
ている。 The present invention will be described below based on an illustrated embodiment. As shown in FIG. 1, a housing 1 is formed by a cylinder tube 2 and covers 3 and 4, and an output sleeve 5 is provided in the housing 1 so as to be slidable in the axial direction. An intermediate hydraulic chamber 6 is formed on the input side, and a return side hydraulic chamber 7 is formed on the input side. The input side end of such a housing 1 is provided with a return port 8 leading to a tank, and the central part thereof is provided with a refueling port 9 leading to a pump.
出力スリーブ５の出力側端部には出力軸１０の
端部がねじ結合で接続され、中央部に貫入孔１
１、入力側にリテーナ１２によ反力用油圧室１３
が設けられている。出力軸１０は例えば、ばね１
４を介してブレーキドラム（図示省略）に接続さ
れている。 The end of an output shaft 10 is connected to the output side end of the output sleeve 5 by a screw connection, and a through hole 1 is provided in the center.
1. Hydraulic chamber 13 for reaction force by retainer 12 on input side
is provided. For example, the output shaft 10 has a spring 1
4 to a brake drum (not shown).
出力スリーブ５には、入力側端部に入力ペダル
１５が接続された入力スプール１６が出力スリー
ブ５に対して相対移動自在に挿入されている。入
力スプール１６の先端部１６Ａが貫入孔１１に挿
入され、フランジ形のピストン部１６Ｂが反力用
油圧室１３内に位置するように先端部１６Ａの入
力側に取付けられている。 An input spool 16 having an input side end connected to an input pedal 15 is inserted into the output sleeve 5 so as to be movable relative to the output sleeve 5 . The tip 16A of the input spool 16 is inserted into the penetration hole 11, and the flange-shaped piston portion 16B is attached to the input side of the tip 16A so as to be located within the reaction hydraulic chamber 13.
出力スリーブ５の外周にはこのスリーブ５が移
動しても常に給油ポート９に連通し得る給油環状
溝１７が設けられている。 An oil supply annular groove 17 is provided on the outer periphery of the output sleeve 5 so that it can always communicate with the oil supply port 9 even when the sleeve 5 moves.
先端部１６Ａには出力側から順に給油側環状溝
１８、戻り側環状溝１９が設けられている。給油
環状溝１７と給油側環状溝１８とは連通孔２０に
より連通し、貫入孔１１における出力スリーブ５
の内面には中間環状溝２１が環状溝１８と１９の
間に位置するように設けられている。さらに、入
力スプール１６には油路２２，２３が形成され、
油路２２により戻り側環状溝１９と戻り側油圧室
７が連通し、油路２３により中間環状溝２１と反
力用油圧室１３が連通する。また、出力スリーブ
５には中間環状溝２１と中間油圧室６とを連通す
る連通孔２４が設けられている。 The tip portion 16A is provided with an oil supply side annular groove 18 and a return side annular groove 19 in order from the output side. The oil supply annular groove 17 and the oil supply side annular groove 18 communicate with each other through a communication hole 20 , and the output sleeve 5 in the penetration hole 11 communicates with each other through a communication hole 20 .
An intermediate annular groove 21 is provided on the inner surface of the annular groove 21 so as to be located between the annular grooves 18 and 19. Furthermore, oil passages 22 and 23 are formed in the input spool 16,
The return side annular groove 19 and the return side hydraulic chamber 7 communicate with each other through the oil passage 22, and the intermediate annular groove 21 and the reaction force hydraulic chamber 13 communicate with each other through the oil passage 23. Further, the output sleeve 5 is provided with a communication hole 24 that communicates the intermediate annular groove 21 and the intermediate hydraulic chamber 6.
このような構成において、入力ペダル１５によ
り入力スプール１６を入力側へ引くと、給油側環
状溝１８によつて連通孔２０と中間環状溝２１が
連通しポンプからの圧油が連通孔２４を通つて中
間油圧室６へ導入され出力スリーブ５を入力側へ
移動させる。これと同時に圧油は油路２３を通つ
て反力用油圧室１３へも導入され、入力スプール
１６と一体化されたピストン部１６Ｂを出力側へ
押し、これにより出力スリーブ５の作動力に比例
した反力が入力スプール１６に伝えられる。この
作動力と反力の比は給油側油圧室６の断面積と中
間油圧室１３の断面積の比で決まる。 In such a configuration, when the input spool 16 is pulled toward the input side by the input pedal 15, the communication hole 20 and the intermediate annular groove 21 are communicated with each other by the oil supply side annular groove 18, and pressure oil from the pump passes through the communication hole 24. It is then introduced into the intermediate hydraulic chamber 6 and moves the output sleeve 5 to the input side. At the same time, the pressure oil is also introduced into the reaction force hydraulic chamber 13 through the oil passage 23, pushing the piston part 16B integrated with the input spool 16 toward the output side, which is proportional to the operating force of the output sleeve 5. The resulting reaction force is transmitted to the input spool 16. The ratio between the actuation force and the reaction force is determined by the ratio of the cross-sectional area of the oil supply side hydraulic chamber 6 and the cross-sectional area of the intermediate hydraulic chamber 13.
次に、入力スプール１６に対して出力スリーブ
５が入力側へ移動すると戻り側環状溝１９と中間
環状溝２１が連通し中間油圧６とを反力用油圧室
１３の圧油が油路２２によりタンクへ抜ける。し
たがつて、油圧室６と１３内の圧力が下がりばね
１４により出力スリーブ５が出力側に戻る。ゆえ
に、油圧室６に発生する圧力とブレーキ力とがバ
ランスしながら、出力軸１０が入力スプール１６
により位置制御されることになる。 Next, when the output sleeve 5 moves toward the input side with respect to the input spool 16, the return side annular groove 19 and the intermediate annular groove 21 communicate with each other, and the intermediate hydraulic pressure 6 is connected to the pressure oil in the reaction hydraulic chamber 13 through the oil passage 22. Exit to the tank. Therefore, the pressure in the hydraulic chambers 6 and 13 decreases, and the spring 14 causes the output sleeve 5 to return to the output side. Therefore, while the pressure generated in the hydraulic chamber 6 and the braking force are balanced, the output shaft 10 is connected to the input spool 16.
The position will be controlled by
また、油圧回路が故障した時には、ピストン部
１６Ｂがリテーナ１２に接触し入力スプール１６
により出力スリーブ５を直接引くことができ、ブ
レーキを作動させることができる。 Furthermore, when the hydraulic circuit breaks down, the piston portion 16B contacts the retainer 12 and the input spool 16
This allows the output sleeve 5 to be pulled directly and the brake to be activated.
この発明に係る油圧式倍力装置は、以上のよう
な構成からなるので、比較的簡単な構成でオペレ
ータへ出力に比例した反力を伝えることができ、
小型化が図れる。 Since the hydraulic booster according to the present invention has the above configuration, it is possible to transmit a reaction force proportional to the output to the operator with a relatively simple configuration,
Can be made smaller.
さらに、油圧回路が故障した場合にもブレーキ
を作動させることができる。 Furthermore, the brakes can be activated even if the hydraulic circuit fails.
図面はこの発明に係る油圧式倍力装置を示す断
面図である。
１……ハウジング、２……シリンダチユーブ、
３，４……カバー、５……出力スリーブ、６……
中間油圧室、７……戻り側油圧室、８……戻りポ
ート、９……給油ポート、１０……出力軸、１１
……貫入孔、１２……リテーナ、１３……反力用
油圧室、１４……ばね、１５……入力ペダル、１
６……入力スプール、１６Ａ……先端部、１６Ｂ
……ピストン部、１７……給油環状溝、１８……
給油側環状溝、１９……戻り側環状溝、２０……
連通孔、２１……中間環状溝、２２，２３……油
路、２４……連通孔。
The drawing is a sectional view showing a hydraulic booster according to the present invention. 1...Housing, 2...Cylinder tube,
3, 4...Cover, 5...Output sleeve, 6...
Intermediate hydraulic chamber, 7...Return side hydraulic chamber, 8...Return port, 9...Refueling port, 10...Output shaft, 11
... Penetration hole, 12 ... Retainer, 13 ... Hydraulic chamber for reaction force, 14 ... Spring, 15 ... Input pedal, 1
6...Input spool, 16A...Tip, 16B
... Piston part, 17 ... Oil supply annular groove, 18 ...
Oil supply side annular groove, 19...Return side annular groove, 20...
Communication hole, 21... intermediate annular groove, 22, 23... oil passage, 24... communication hole.
Claims (1)
と、出力側端部に出力軸が接続され前記ハウジン
グ内を軸方向に摺動自在とされて出力側に中間油
圧室、入力側に戻り側油圧室を形成する出力スリ
ーブと、入力側に入力手段が接続され出力側端部
が前記出力スリーブに挿入された入力スプールと
を備え、出力スリーブの入力側端部にリテーナに
より反力用油圧室を設けるとともに入力スプール
にフランジ形のピストン部を前記反力用油圧室内
に位置するように突設し、給油ポートと中間油圧
室および反力用油圧室とが連通し、かつ戻りポー
トと前記二つの油圧室とが連通し得るように環状
溝および油路を出力スリーブおよび入力スプール
に設けてあることを特徴とする油圧式倍力装置。1 A housing having a refueling port and a return port, and an output shaft connected to the output side end and slidable in the axial direction within the housing to form an intermediate hydraulic chamber on the output side and a return side hydraulic chamber on the input side. and an input spool whose input means is connected to the input side and whose output side end is inserted into the output sleeve, and a hydraulic chamber for reaction force is provided at the input side end of the output sleeve by a retainer. A flange-shaped piston part is protruded from the spool so as to be located in the reaction hydraulic chamber, and the oil supply port communicates with the intermediate hydraulic chamber and the reaction hydraulic chamber, and the return port and the two hydraulic chambers communicate with each other. 1. A hydraulic booster characterized in that an annular groove and an oil passage are provided in an output sleeve and an input spool so that the output sleeve and the input spool can communicate with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56197307A JPS5897549A (en) | 1981-12-08 | 1981-12-08 | Hydraulic booster device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56197307A JPS5897549A (en) | 1981-12-08 | 1981-12-08 | Hydraulic booster device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5897549A JPS5897549A (en) | 1983-06-10 |
| JPS6337746B2 true JPS6337746B2 (en) | 1988-07-27 |
Family
ID=16372274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56197307A Granted JPS5897549A (en) | 1981-12-08 | 1981-12-08 | Hydraulic booster device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5897549A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49133772A (en) * | 1973-05-02 | 1974-12-23 |
-
1981
- 1981-12-08 JP JP56197307A patent/JPS5897549A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5897549A (en) | 1983-06-10 |
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