JPH09175355A - Braking fluid pressure control device of load response type - Google Patents

Braking fluid pressure control device of load response type

Info

Publication number
JPH09175355A
JPH09175355A JP33864395A JP33864395A JPH09175355A JP H09175355 A JPH09175355 A JP H09175355A JP 33864395 A JP33864395 A JP 33864395A JP 33864395 A JP33864395 A JP 33864395A JP H09175355 A JPH09175355 A JP H09175355A
Authority
JP
Japan
Prior art keywords
load
plunger
load detection
control device
pressure control
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.)
Pending
Application number
JP33864395A
Other languages
Japanese (ja)
Inventor
Hiroshi Yoshida
寛 吉田
Hidemi Hayashi
英巳 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jidosha Kiki Co Ltd
Original Assignee
Jidosha Kiki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jidosha Kiki Co Ltd filed Critical Jidosha Kiki Co Ltd
Priority to JP33864395A priority Critical patent/JPH09175355A/en
Publication of JPH09175355A publication Critical patent/JPH09175355A/en
Pending legal-status Critical Current

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  • Hydraulic Control Valves For Brake Systems (AREA)
  • Regulating Braking Force (AREA)

Abstract

PROBLEM TO BE SOLVED: To construct a load sensing lever light and small, reduce the costs, and enhance the producibility. SOLUTION: This braking fluid pressure control device according to the invention is equipped with a valve mechanism which decompresses the fluid pressure given from a master cylinder at a prescribed rate and transmits the resultant pressure to a rear wheel brake cylinder and a load sensing mechanism 30 which applies a load in compliance with the load on the vehicle concerned to a plunger and moves the decompressing operation starting point of the valve mechanism. A load sensing lever 31 is made from a plate material as having two planes 31b, 31c which are made at approximately right angle in the longitudinal direction, and the surface of one of the ends 31b of the lever 31 is made a plane approx. perpendicular to the shaft of the plunger while the other surface 31c on the plunger side is made a plane approximately parallel with the shaft of the plunger and contacted with the plunger side through a projection 31g formed on the shorter side face of the plate material having a rectangular section which stretches in the longitudinal direction.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、荷重応動制動液圧
制御装置に関し、特にその荷重検知機構の改良に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load-responsive braking hydraulic pressure control device, and more particularly to an improvement of its load detection mechanism.

【0002】[0002]

【従来の技術】従来、この種の荷重応動制動液圧制御装
置は、ブレーキマスタシリンダから後輪ブレーキシリン
ダに至る液圧通路の途中に配設されており、図5に示す
ように制動初期での低制動力時には、前輪側と等しい制
動力を後輪側に与え、制動力が所定値(図5のなかの動
作開始点A)以上になったときには前輪側に対して、所
定の割合の制動力を後輪側に与えるようにし、これによ
り後輪ロックを防止するようになっている。
2. Description of the Related Art Conventionally, a load-responsive braking hydraulic pressure control device of this type is arranged in the hydraulic pressure passage extending from a brake master cylinder to a rear wheel brake cylinder, and as shown in FIG. When the braking force is low, the same braking force as that on the front wheel side is applied to the rear wheel side, and when the braking force becomes equal to or more than a predetermined value (operation start point A in FIG. 5), a predetermined ratio to the front wheel side is provided. The braking force is applied to the rear wheels, thereby preventing the rear wheels from locking.

【0003】そして、トラックなどの車両では積載荷重
の大小によって、後輪ロックが生ずる制動力の大きさが
異なってくるので、後輪制動力を減少させ始める制動力
を、積載荷重の大のときは大きく、小のときは小さくす
るように構成されている。
In a vehicle such as a truck, the magnitude of the braking force that causes the rear wheel locking varies depending on the size of the loaded load. Therefore, when the loaded load is large, the braking force that begins to reduce the rear wheel braking force is reduced. Is large, and small is small.

【0004】従来から、よく知られている荷重応動制動
液圧制御装置としては、その断面が、例えば図6に示す
ようなものがある。図6において、通常、車両(例えば
自動車)のシャーシ側に取り付けられる前記液圧制御装
置1は、ハウジング2内に摺動自在に配設され、かつ入
力ポート3を介して、図示しないブレーキマスタシリン
ダからの液圧で応動するプランジャ4の動きによって、
前記ハウジング2に形成されている弁機構5を開閉して
いる。そして、この弁機構5の開閉により、前記入力ポ
ート3に伝達される前記マスタシリンダからの液圧を所
定の割合で減圧させ、出力ポート6から図示しない後輪
ブレーキシリンダに伝達している。
As a well-known load-responsive braking hydraulic pressure control device, there is one having a cross section as shown in FIG. 6, for example. In FIG. 6, the hydraulic pressure control device 1 normally mounted on the chassis side of a vehicle (for example, an automobile) is slidably arranged in a housing 2 and is connected to an unillustrated brake master cylinder via an input port 3. By the movement of the plunger 4 which responds to the hydraulic pressure from
The valve mechanism 5 formed in the housing 2 is opened and closed. By opening and closing the valve mechanism 5, the hydraulic pressure from the master cylinder transmitted to the input port 3 is reduced at a predetermined rate, and is transmitted from the output port 6 to a rear wheel brake cylinder (not shown).

【0005】次いで、前記弁機構5に、車両の積載荷重
に応じた特性を付与するため、荷重検知機構7を介し
て、積載荷重に応じた力を前記プランジャ4に作用せし
めて、前記弁機構5の減圧動作開始点を移動させてい
る。この荷重検知機構7は、一端8aが前記弁機構5の
ハウジング2に搖動可能に支持された荷重検知レバー8
と、一端10aが車両の車軸側9に固着されたロッド1
0と、前記荷重検知レバー8の他端8bと前記ロッド1
0の他端10bとの間に連結され、前記車両の積載荷重
に応じた付勢力を、前記荷重検知レバー8を介して前記
プランジャ4に作用させる板状の荷重検知ばね11とか
らなっている。
Next, in order to give the valve mechanism 5 a characteristic according to the vehicle load, a force corresponding to the vehicle load is applied to the plunger 4 via the load detection mechanism 7, and the valve mechanism 5 is operated. The depressurization operation start point of 5 is moved. The load detecting mechanism 7 has a load detecting lever 8 whose one end 8a is swingably supported by the housing 2 of the valve mechanism 5.
And the rod 1 whose one end 10a is fixed to the axle side 9 of the vehicle.
0, the other end 8b of the load detection lever 8 and the rod 1
And a plate-shaped load detection spring 11 which is connected to the other end 10b of 0 and applies an urging force corresponding to the loaded load of the vehicle to the plunger 4 via the load detection lever 8. .

【0006】また、前記液圧制御装置1には、前記荷重
検知レバー8の位置決め機構12が装着されている。該
位置決め機構12は、前記ハウジング2の一部に螺着さ
れたねじ部材13と、該ねじ部材13に螺合するナット
14と、前記ねじ部材13が挿通する長穴を有し、かつ
前記荷重検知レバー8の他端8bに、固定部材15によ
り固着されたブラケット16とからなり、前記荷重検知
レバー8を所望の位置から前記プランジャ4側に回動可
能にして、所定の空荷特性が得られるようにしている。
A positioning mechanism 12 for the load detection lever 8 is mounted on the hydraulic pressure control device 1. The positioning mechanism 12 has a screw member 13 screwed to a part of the housing 2, a nut 14 screwed into the screw member 13, and an elongated hole through which the screw member 13 is inserted, and the load is provided. The other end 8b of the detection lever 8 is composed of a bracket 16 fixed by a fixing member 15, and the load detection lever 8 can be rotated from a desired position to the plunger 4 side to obtain a predetermined empty load characteristic. I am allowed to do so.

【0007】さらに、前記ハウジング2の外部に突出さ
れた前記プランジャ4の端および前記荷重検知レバー8
の支持部を外部の塵埃や異物から保護するため、防塵ブ
ーツ17が装着されている。(特開平7ー52773 号公報)
Further, the end of the plunger 4 protruding to the outside of the housing 2 and the load detecting lever 8
A dustproof boot 17 is attached in order to protect the supporting portion of the above from external dust and foreign matter. (JP-A-7-52773)

【0008】[0008]

【発明が解決しようとする課題】ところで、前記従来の
荷重応動制動液圧制御装置1にあっては、前記荷重検知
レバー8は、前記プランジャ4の直角方向に力が加わる
と同時に、その他端8bは、前記板状の荷重検知ばね1
1を連結し、固着するため、平面状に形成する必要があ
った。このため、該荷重検知レバー8は、金属の鋳物品
または鍛造品で製造されていた。
By the way, in the conventional load-responsive braking hydraulic pressure control device 1, the load detecting lever 8 receives a force in the direction perpendicular to the plunger 4 and at the same time, the other end 8b. Is the plate-shaped load detection spring 1
In order to connect 1 and to fix, it was necessary to form in a plane. Therefore, the load detection lever 8 is manufactured by a metal casting or forged product.

【0009】しかしながら、該荷重検知レバー8を金属
の鋳物品または鍛造品で製造すると、大型で重量が増す
上、平面を含む所定の外形形状に加工するための機械加
工部分が多くなり、コストが高くなるという問題点があ
った。同時に、ハウジング2の外部に突出された前記プ
ランジャ4の端および前記荷重検知レバー8の支持部を
保護する防塵ブーツ17の取付けのため、前記荷重検知
レバー8の溝加工が必要であり、さらに加工コストが嵩
むという問題点もあった。
However, when the load detection lever 8 is manufactured from a metal casting or forged product, the load detection lever 8 is large and heavy, and the number of machining parts for processing a predetermined outer shape including a flat surface increases, resulting in cost reduction. There was a problem that it would be expensive. At the same time, in order to attach the dustproof boot 17 that protects the end of the plunger 4 protruding to the outside of the housing 2 and the support portion of the load detection lever 8, it is necessary to form a groove in the load detection lever 8 and further process it. There was also the problem of increased costs.

【0010】本発明はかかる点に鑑みなされたもので、
その目的は前記問題点を解消し、前記荷重検知レバーの
小型、軽量化とコストの低減を図るとともに、生産性の
向上を図った荷重応動制動液圧制御装置を提供すること
にある。
[0010] The present invention has been made in view of such a point,
An object of the present invention is to provide a load-responsive braking hydraulic pressure control device that solves the above problems, reduces the size and weight of the load detection lever, reduces the cost, and improves productivity.

【0011】本発明の他の目的は、前記プランジャ端お
よび前記荷重検知レバーの支持部を保護する防塵ブーツ
の取付けのための前記荷重検知レバーへの溝加工などを
必要としない荷重応動制動液圧制御装置を提供すること
にある。
Another object of the present invention is to provide a load-responsive braking hydraulic pressure that does not require grooving or the like on the load detection lever for attaching a dustproof boot that protects the plunger end and the support portion of the load detection lever. It is to provide a control device.

【0012】[0012]

【課題を解決するための手段】前記目的を達成するため
の本発明の構成は、ハウジング内に摺動自在に配設さ
れ、ブレーキマスタシリンダからの液圧で応動するプラ
ンジャの開閉によって、該マスタシリンダの液圧を所定
の割合で減圧して、後輪ブレーキシリンダに伝達する弁
機構と、車両の積載荷重に応じた荷重を前記プランジャ
に作用せしめて、前記弁機構の減圧動作開始点を移動さ
せる荷重検知機構とを備え、該荷重検知機構は、一端が
前記ハウジングに搖動可能に支持された荷重検知レバー
と、一端が車軸側に固着されたロッドと、前記荷重検知
レバーの他端と前記ロッドの他端との間に連結され、前
記車両の積載荷重に応じた付勢力を、前記荷重検知レバ
ーを介して前記プランジャに作用させる端部が板状の荷
重検知ばねとからなる液圧制御装置において、次のとお
りである。
The structure of the present invention for achieving the above object is such that a master, which is slidably disposed in a housing and is opened and closed by a hydraulic pressure from a brake master cylinder, opens and closes the master. Move the pressure reduction starting point of the valve mechanism by causing the valve mechanism that reduces the hydraulic pressure of the cylinder at a predetermined rate and transmits it to the rear wheel brake cylinder, and the load according to the vehicle load to the plunger. And a load detection mechanism, wherein the load detection mechanism has one end swingably supported by the housing, one end fixed to the axle side of the rod, and the other end of the load detection lever. The load detecting spring is connected to the other end of the rod and has a plate-shaped load detecting spring whose end portion applies an urging force corresponding to the loaded load of the vehicle to the plunger via the load detecting lever. The fluid pressure control device is as follows.

【0013】(1)前記荷重検知レバーは、その長さ方
向に、2つの平面が互いにほぼ直角になるように形成さ
れた板材からなり、該荷重検知レバーの一方の前記他端
の面は前記プランジャ軸にほぼ直角な平面に、他方の前
記プランジャ側の面は該プランジャ軸にほぼ平行な平面
になるように配設され、前記板材の断面縦長長方形の短
側面に形成された突起部を介して、前記プランジャに当
接されることを特徴とする。
(1) The load detecting lever is made of a plate material in which two planes are formed at right angles to each other in the length direction, and one surface of the other end of the load detecting lever is the above-mentioned. A plane substantially perpendicular to the plunger axis is arranged, and the other surface on the side of the plunger is arranged to be a plane substantially parallel to the plunger axis, and a protrusion formed on the short side surface of the rectangular cross section of the plate material is interposed. And is brought into contact with the plunger.

【0014】(2)前記(1)において、前記荷重検知
レバーは、前記板材が、プレス加工により直角方向に2
回折り曲げて形成されることを特徴とする。
(2) In the above (1), the load detecting lever is formed by pressing the plate material in a direction perpendicular to the plate.
It is characterized by being bent and folded.

【0015】本発明は以上のように構成されているの
で、前記荷重検知レバーは、例えばアルミ系の1枚の板
材からなり、これをプレス加工のみにより、その長さ方
向に、2つの平面が互いにほぼ直角になるように形成さ
れるので、小型、軽量化と機械加工コストの低減を図る
ことができる。また、前記板材のプランジャ側の板部分
は、該プランジャ軸にほぼ平行な平面になるように配設
され、該板材の断面縦長長方形の短面側が、前記プラン
ジャ端に突起部を介して当接されるので、前記荷重検知
レバーは前記板材の剛性を大きくすることができる。
Since the present invention is configured as described above, the load detection lever is made of, for example, one aluminum plate, and by pressing this plate, two planes are formed in the length direction thereof. Since they are formed so as to be substantially orthogonal to each other, it is possible to reduce the size and weight and reduce the machining cost. Further, the plate portion of the plate member on the plunger side is arranged so as to be a plane substantially parallel to the plunger axis, and the short side of the vertically long rectangular cross section of the plate member abuts the end of the plunger via a protrusion. Therefore, the load detection lever can increase the rigidity of the plate material.

【0016】[0016]

【発明の実施の形態】以下、図面に基づいて本発明の好
適な実施の形態を例示的に詳しく説明する。図1は、本
発明の荷重応動制動液圧制御装置の一実施例を示す縦断
面図、図2は、図1のII-II 線矢視による拡大断面図で
ある。
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will now be exemplarily described in detail with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of a load-responsive braking hydraulic pressure control device of the present invention, and FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

【0017】図1および図2において、通常、車両、例
えば自動車のシャーシ側に取り付けられる前記液圧制御
装置21は、ハウジング22内に摺動自在に、かつ液密
的に配設されるとともに、入力ポート23およびバイパ
ス通路24を介して、図示しないブレーキマスタシリン
ダからの液圧で応動するプランジャ25によって、前記
ハウジング22内に形成されている開閉弁26を開閉し
ている。そして、この開閉弁25の開閉により、前記入
力ポート23に伝達される前記マスタシリンダからの液
圧を所定の割合で減圧させ、出力ポート27から図示し
ないに後輪ブレーキシリンダに伝達している。
1 and 2, the hydraulic pressure control device 21, which is usually mounted on the chassis side of a vehicle, for example, an automobile, is slidably and liquid-tightly disposed in a housing 22. An on-off valve 26 formed in the housing 22 is opened and closed by a plunger 25 that responds to the hydraulic pressure from a brake master cylinder (not shown) via an input port 23 and a bypass passage 24. By opening / closing the on-off valve 25, the hydraulic pressure from the master cylinder transmitted to the input port 23 is reduced at a predetermined rate, and is transmitted from the output port 27 to a rear wheel brake cylinder (not shown).

【0018】そして、前記開閉弁26に、車両の積載荷
重に応じた特性を付与するため、荷重検知機構30を介
して、積載荷重に応じた力を前記プランジャ24に作用
せしめ、前記開閉弁26の減圧動作開始点を移動させて
いる。この荷重検知機構30は、荷重検知レバー31
と、板状の荷重検知ばね32と、車軸側9に固着された
ロッド34とから構成されている。
In order to give the opening / closing valve 26 a characteristic according to the vehicle load, the force corresponding to the vehicle load is applied to the plunger 24 via the load detection mechanism 30 to cause the opening / closing valve 26. The decompression operation start point of is moved. The load detection mechanism 30 includes a load detection lever 31.
And a plate-shaped load detection spring 32 and a rod 34 fixed to the axle side 9.

【0019】前記荷重検知レバー31は、その一端31
aが支点として、前記ハウジング22の一端33に搖動
可能に支持されており、前記荷重検知ばね32は、その
一端32aが、前記車軸側9に固着されたロッド34の
一端34aに固定部材35により連結されるとともに、
その他端32bは前記荷重検知レバー31の他端31b
に固定部材36により連結され、前記車両の積載荷重に
応じた付勢力を前記荷重検知レバー31に付与してい
る。
The load detecting lever 31 has one end 31
a is a fulcrum and is swingably supported by one end 33 of the housing 22, and the load detection spring 32 has one end 32a fixed to one end 34a of a rod 34 fixed to the axle side 9 by a fixing member 35. With being connected,
The other end 32b is the other end 31b of the load detection lever 31.
Is connected to the load detection lever 31 by a fixing member 36.

【0020】ところで、前記荷重検知レバー31は、図
3の平面図および図4の正面図に示すように、例えばア
ルミ系の1枚の、厚さがほぼ均一な板材からなり、これ
をプレス加工により直角方向に2回折り曲げて、その長
さ方向に、1つの平面31cと、前記他端31bの面と
が互いにほぼ直角になるように形成されている。同時
に、支点穴31d、前記荷重検知ばね32の取付穴31
eおよび後記ローディングばね40との連結穴31f
は、前記プレス加工時にあけられる。
As shown in the plan view of FIG. 3 and the front view of FIG. 4, the load detection lever 31 is made of, for example, one aluminum plate having a substantially uniform thickness. Is bent twice at a right angle, and one flat surface 31c and the surface of the other end 31b are formed substantially at right angles to each other in the length direction. At the same time, the fulcrum hole 31d and the mounting hole 31 for the load detection spring 32
e and a connection hole 31f for connecting with a loading spring 40 described later
Are opened during the press working.

【0021】また、該荷重検知レバー31の前記他端3
1bの面は前記プランジャ25軸にほぼ直角な平面に、
前記プランジャ25側の平面31cは前記プランジャ2
5軸にほぼ平行な平面になるように配設されるととも
に、該検知レバー31の前記平面31c部分の断面縦長
長方形の短側面で、前記プランジャ25端側に当接され
る部分には、突起部31gが形成されている。この突起
部31gは、前記プランジャ25の下端にばね37を介
して、前記ハウジング22から突出するように配設され
たきのこ形状の押圧部材38の頭部38aに当接されて
いる。
The other end 3 of the load detection lever 31
The surface of 1b is a plane substantially perpendicular to the axis of the plunger 25,
The flat surface 31c on the plunger 25 side is the plunger 2
It is arranged so as to be a plane substantially parallel to the five axes, and a protrusion is formed on the portion of the short side surface of the rectangular plane section 31c of the detection lever 31 that is in contact with the end of the plunger 25. The portion 31g is formed. The protrusion 31g is in contact with a head portion 38a of a mushroom-shaped pressing member 38 arranged so as to protrude from the housing 22 via a spring 37 at the lower end of the plunger 25.

【0022】なお、前記ローディングばね40は、ハウ
ジング22の突出部22a側と、摺動自在に該突出部2
2aを貫通する摺動軸41の一端に係着されたばね受け
42との間に配設され、該摺動軸41の他端は、連結部
材43により、前記荷重検知レバー31の前記連結穴3
1fを介して、該荷重検知レバー31に連結されてい
る。
The loading spring 40 is slidable with respect to the side of the protruding portion 22a of the housing 22.
The sliding shaft 41 is arranged between one end of a sliding shaft 41 passing through the spring 2a and a spring receiver 42. The other end of the sliding shaft 41 is connected by a connecting member 43 to the connecting hole 3 of the load detecting lever 31.
It is connected to the load detection lever 31 via 1f.

【0023】前記ローディングばね40の付勢力は、前
記ハウジング22内の開閉弁26を開弁させる方向に、
前記プランジャ25を付勢している。このローディング
ばね40の付勢力に対して、前記荷重検知機構30の前
記荷重検知ばね32の付勢力は、逆方向に作用するよう
になっている。したがって、前記ローディングばね40
の付勢力と、前記荷重検知ばね32の付勢力との差によ
って、前記プランジャ25は、前記開閉弁26を開弁さ
せる方向に、付勢されている。
The urging force of the loading spring 40 causes the opening / closing valve 26 in the housing 22 to open.
The plunger 25 is biased. The urging force of the load detection spring 32 of the load detection mechanism 30 acts in the opposite direction to the urging force of the loading spring 40. Therefore, the loading spring 40
The plunger 25 is biased in the direction to open the on-off valve 26 by the difference between the biasing force of the load detection spring 32 and the biasing force of the load detection spring 32.

【0024】このように、前記開閉弁26に、車両の積
載荷重に応じた特性を付与するため、前記荷重検知機構
30の前記荷重検知ばね32および荷重検知レバー31
を介して、積載荷重に応じた力を前記プランジャ24に
作用せしめて、前記開閉弁26の減圧動作開始点を移動
させている。
As described above, the load detecting spring 32 and the load detecting lever 31 of the load detecting mechanism 30 are provided in order to give the opening / closing valve 26 a characteristic according to the load of the vehicle.
A force corresponding to the loaded load is applied to the plunger 24 via the to move the decompression operation start point of the opening / closing valve 26.

【0025】また、前記荷重検知レバー31の、前記プ
ランジャ25端側に当接する前記突起部31g付近は、
1枚の板状であるため、防塵用のブーツ46を貫通する
部分に周溝を設ける必要はなく、該ブーツ46に、貫通
させるための切れ目46aを設ければよい。そして、前
記ブーツ46の前記切れ目46aに、前記荷重検知レバ
ー31を貫通させながら、前記ハウジング22に設けら
れた円周溝22bに、固定リング47により前記ブーツ
46を装着する。このようなブーツ46により、前記プ
ランジャ25端を押圧する前記押圧部材38および前記
荷重検知レバー8の支持部を外部の塵埃や異物から保護
することができる。
Further, in the vicinity of the protrusion 31g of the load detection lever 31, which is in contact with the end of the plunger 25,
Since it is a single plate, it is not necessary to provide a circumferential groove in a portion that penetrates the dustproof boot 46, and the cut 46a for penetrating the boot 46 may be provided. Then, the boot 46 is attached to the circumferential groove 22 b provided in the housing 22 by the fixing ring 47 while the load detection lever 31 is passed through the cut 46 a of the boot 46. With such a boot 46, it is possible to protect the pressing member 38 that presses the end of the plunger 25 and the support portion of the load detection lever 8 from external dust and foreign matter.

【0026】なお、本発明の技術は前記実施例における
技術に限定されるものではなく、同様な機能を果たす他
の態様の手段によってもよく、また本発明の技術は前記
構成の範囲内において種々の変更、付加が可能である。
Note that the technique of the present invention is not limited to the technique in the above-mentioned embodiment, and may be implemented by means of another aspect that achieves the same function. Can be changed or added.

【0027】[0027]

【発明の効果】以上の説明から明らかなように本発明の
荷重応動制動液圧制御装置によれば、請求項1および2
については、前記荷重検知レバーは、その長さ方向に、
2つの平面が互いにほぼ直角になるように形成された板
材からなり、該荷重検知レバーの一方の前記他端の面は
前記プランジャ軸にほぼ直角な平面に、他方の前記プラ
ンジャ側の面は該プランジャ軸にほぼ平行な平面になる
ように配設され、前記板材の断面縦長長方形の短側面に
形成された突起部を介して、前記プランジャに当接され
るので、前記荷重検知レバーの小型、軽量化とコストの
低減を図るとともに、生産性の向上を図ることができ
る。
As is apparent from the above description, according to the load-responsive braking hydraulic pressure control device of the present invention, the first and second aspects are provided.
For the load detection lever, in the longitudinal direction,
The load detection lever is formed of a plate material formed so as to be substantially perpendicular to each other. One surface of the other end of the load detection lever is a surface substantially perpendicular to the plunger axis, and the other surface of the load detection lever on the plunger side is the same. The load detecting lever is small in size because it is disposed so as to be a plane substantially parallel to the plunger axis and abuts on the plunger through the projection formed on the short side surface of the vertically long rectangular cross section of the plate material. It is possible to reduce the weight and cost and improve the productivity.

【0028】また、本発明の荷重応動制動液圧制御装置
によれば、前記荷重検知レバーの、前記プランジャ端お
よび該荷重検知レバーの支持部を保護する防塵ブーツの
取付部分は、1枚の板材であるため、該板材への溝加工
などを必要としない。
Further, according to the load-responsive braking hydraulic pressure control device of the present invention, the attachment portion of the dust detection boot for protecting the plunger end and the support portion of the load detection lever of the load detection lever is a single plate member. Therefore, it is not necessary to form a groove in the plate material.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の荷重応動制動液圧制御装置の一実施例
を示す縦断面図である。
FIG. 1 is a longitudinal sectional view showing an embodiment of a load-responsive braking hydraulic pressure control device of the present invention.

【図2】図1のII-II 線矢視による拡大断面図である。FIG. 2 is an enlarged sectional view taken along the line II-II of FIG.

【図3】荷重検知レバーの平面図である。FIG. 3 is a plan view of a load detection lever.

【図4】図3の正面図である。FIG. 4 is a front view of FIG. 3;

【図5】荷重応動制動液圧制御装置における入力圧と出
力圧との関係を示す特性図である。
FIG. 5 is a characteristic diagram showing a relationship between an input pressure and an output pressure in the load-responsive braking hydraulic pressure control device.

【図6】従来の荷重応動制動液圧制御装置を示す縦断面
図である。
FIG. 6 is a longitudinal sectional view showing a conventional load-responsive braking hydraulic pressure control device.

【符号の説明】[Explanation of symbols]

1、21 荷重応動制動液圧制御装置 2、22 ハウジング 4、25 プランジャ 5、26 開閉弁 7、30 荷重検知機構 8、31 荷重検知レバー 9 車軸側 10、34 ロッド 11、32 荷重検知ばね 31a 一端 31b 他端 31c 平面 31d 支点穴 31e 取付穴 31f 連結穴 31g 突起部 1, 21 Load-responsive braking hydraulic pressure control device 2, 22 Housing 4, 25 Plunger 5, 26 Open / close valve 7, 30 Load detection mechanism 8, 31 Load detection lever 9 Axle side 10, 34 Rod 11, 32 Load detection spring 31a One end 31b other end 31c plane 31d fulcrum hole 31e mounting hole 31f connecting hole 31g protrusion

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 ハウジング内に摺動自在に配設され、ブ
レーキマスタシリンダからの液圧で応動するプランジャ
の開閉によって、該マスタシリンダの液圧を所定の割合
で減圧して、後輪ブレーキシリンダに伝達する弁機構
と、車両の積載荷重に応じた荷重を前記プランジャに作
用せしめて、前記弁機構の減圧動作開始点を移動させる
荷重検知機構とを備え、該荷重検知機構は、一端が前記
ハウジングに搖動可能に支持された荷重検知レバーと、
一端が車軸側に固着されたロッドと、前記荷重検知レバ
ーの他端と前記ロッドの他端との間に連結され、前記車
両の積載荷重に応じた付勢力を、前記荷重検知レバーを
介して前記プランジャに作用させる端部が板状の荷重検
知ばねとからなる液圧制御装置において、 前記荷重検知レバーは、その長さ方向に、2つの平面が
互いにほぼ直角になるように形成された板材からなり、
該荷重検知レバーの一方の前記他端の面は前記プランジ
ャ軸にほぼ直角な平面に、他方の前記プランジャ側の面
は該プランジャ軸にほぼ平行な平面になるように配設さ
れ、前記板材の断面縦長長方形の短側面に形成された突
起部を介して、前記プランジャ端側に当接されることを
特徴とする荷重応動制動液圧制御装置。
1. A rear wheel brake cylinder, in which the hydraulic pressure of the master cylinder is reduced at a predetermined rate by opening and closing a plunger that is slidably disposed in the housing and that responds to the hydraulic pressure from the brake master cylinder. And a load detection mechanism that moves a decompression operation start point of the valve mechanism by causing a load according to a vehicle load to act on the plunger, and one end of the load detection mechanism is the load detection mechanism. A load detection lever that is swingably supported by the housing,
One end of the rod is fixed to the axle side, and the other end of the load detection lever and the other end of the rod are connected to each other, and a biasing force corresponding to a load of the vehicle is applied via the load detection lever. A fluid pressure control device having an end portion acting on the plunger and a plate-shaped load detection spring, wherein the load detection lever is a plate member formed such that two planes are substantially perpendicular to each other in a length direction thereof. Consists of
One surface of the other end of the load detection lever is arranged to be a plane substantially perpendicular to the plunger axis, and the other surface of the load lever side is arranged to be a plane substantially parallel to the plunger axis. A load-responsive braking hydraulic pressure control device, wherein the load-responsive braking hydraulic pressure control device is in contact with the plunger end side via a projection formed on a short side surface of a vertically long rectangular cross section.
【請求項2】 前記荷重検知レバーは、前記板材が、プ
レス加工により直角方向に2回折り曲げて形成されるこ
とを特徴とする請求項1に記載の荷重応動制動液圧制御
装置。
2. The load-responsive braking hydraulic pressure control device according to claim 1, wherein the load detection lever is formed by bending the plate material twice at right angles by press working.
JP33864395A 1995-12-26 1995-12-26 Braking fluid pressure control device of load response type Pending JPH09175355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33864395A JPH09175355A (en) 1995-12-26 1995-12-26 Braking fluid pressure control device of load response type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33864395A JPH09175355A (en) 1995-12-26 1995-12-26 Braking fluid pressure control device of load response type

Publications (1)

Publication Number Publication Date
JPH09175355A true JPH09175355A (en) 1997-07-08

Family

ID=18320111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33864395A Pending JPH09175355A (en) 1995-12-26 1995-12-26 Braking fluid pressure control device of load response type

Country Status (1)

Country Link
JP (1) JPH09175355A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100333285B1 (en) * 1999-12-16 2002-04-25 이계안 Brake system for automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100333285B1 (en) * 1999-12-16 2002-04-25 이계안 Brake system for automobile

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