JPS6312830B2 - - Google Patents
Info
- Publication number
- JPS6312830B2 JPS6312830B2 JP15951179A JP15951179A JPS6312830B2 JP S6312830 B2 JPS6312830 B2 JP S6312830B2 JP 15951179 A JP15951179 A JP 15951179A JP 15951179 A JP15951179 A JP 15951179A JP S6312830 B2 JPS6312830 B2 JP S6312830B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder body
- oil reservoir
- oil
- mounting flange
- cylinder
- 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
- 238000005192 partition Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 94
- 235000014676 Phragmites communis Nutrition 0.000 description 8
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000005553 drilling Methods 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Transmission Of Braking Force In Braking Systems (AREA)
Description
【発明の詳細な説明】
本発明は、自動車の主として２系統式油圧ブレ
ーキに用いられるタンデム型マスタシリンダ、特
に、後端の取付フランジが自動車のエンジンルー
ムで車室前面壁に直接または倍力装置を介して接
合されるシリンダ本体を有し、このシリンダ本体
のシリンダ孔内に、それに摺合する一対のピスト
ンにより各独立した後部の第１油圧室および前部
の第２油圧室を画成し、またシリンダ本体の上側
には、隔壁より区画された第１及び第２油溜室を
有する補助油溜を前記第２油溜室に隣接して連設
し、さらにこの補助油溜の上端に前記両油溜室と
連通する主油溜を連設し、一方の前記油溜室底面
に第２油圧室の補給孔を開口する一方、他方の前
記油溜室を油路を介して第１油圧室の補給孔に連
通した自動車のタンデム型マスタシリンダの改良
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tandem master cylinder mainly used in two-system hydraulic brakes of automobiles, and in particular to a tandem master cylinder whose rear end mounting flange is attached directly to the front wall of the passenger compartment in the engine room of the automobile or to a booster. The cylinder body has a cylinder body joined via a cylinder hole, and a pair of pistons slidingly engaged with the cylinder body defines a first hydraulic chamber at the rear and a second hydraulic chamber at the front, respectively, and Further, on the upper side of the cylinder body, an auxiliary oil sump having first and second oil sump chambers separated by a partition wall is provided adjacent to the second oil sump chamber, and further, at the upper end of the auxiliary oil sump, A main oil sump communicating with both oil sump chambers is installed in series, and a replenishment hole for a second oil pressure chamber is opened at the bottom of one of the oil sump chambers, while a first oil pressure is connected to the other oil sump chamber through an oil passage. This invention relates to an improvement in a tandem-type master cylinder for an automobile that communicates with a supply hole in a chamber.
従来のかかるタンデム型マスタシリンダでは、
実開昭53−130730号公報に開示されているよう
に、シリンダ本体の上面に突設された前後一対の
ボスに、シリンダ本体とは別個に成形された補助
油溜と、この補助油溜から後方に延出する油路形
成部とがボルトにより固着しているが、こうした
ものでは、ボルトを螺着するためのボスの存在に
より補助油溜をシリンダ本体から上方へ一定の距
離をおいて配置せざるを得ず、このため主油溜の
高さを極力低くしようとしても或る限界があり、
車種によつては主油溜がこれを覆うボンネツトと
干渉するという問題があつた。 In the conventional tandem type master cylinder,
As disclosed in Japanese Utility Model Application Publication No. 53-130730, an auxiliary oil reservoir formed separately from the cylinder body is formed on a pair of front and rear bosses protruding from the upper surface of the cylinder body, and from this auxiliary oil reservoir. The oil passage forming part extending rearward is fixed with a bolt, but in such a case, the auxiliary oil reservoir is placed a certain distance upward from the cylinder body due to the presence of a boss for screwing the bolt. Therefore, even if we try to lower the height of the main oil sump as much as possible, there is a certain limit.
Depending on the car model, there was a problem that the main oil sump interfered with the bonnet that covered it.
本発明は、かかる事情に鑑みてなされたもの
で、補助油溜をシリンダ本体に最近接させ得て、
主油溜の高さを充分に下げることができ、しかも
油路の形成が容易、確実であると共に取付フラン
ジの支持強度が高い前記タンデム型マスタシリン
ダを提供することを目的とする。 The present invention was made in view of such circumstances, and it is possible to bring the auxiliary oil reservoir closest to the cylinder body,
It is an object of the present invention to provide a tandem type master cylinder which can sufficiently lower the height of a main oil reservoir, can easily and reliably form an oil passage, and has a high support strength of a mounting flange.
この目的を達成するために、本発明は、シリン
ダ本体及び補助油溜を、前者の上壁の一部と後者
の底壁とが共通化するように一体に形成し、この
補助油溜及び取付フランジ間を接続するようにシ
リンダ本体の上壁に厚肉部を一体に形成すると共
に、この厚肉部に取付フランジの端面からの穿孔
により油路を形成し、この油路の、前記取付フラ
ンジに設けられる穿孔口には、車室前面壁または
倍力装置に対面して抜止めされる盲栓を圧入した
ことを特徴とする。 In order to achieve this object, the present invention forms the cylinder body and the auxiliary oil sump integrally so that a part of the upper wall of the former and the bottom wall of the latter are common, and the auxiliary oil sump and the auxiliary oil sump are integrally formed. A thick-walled portion is integrally formed on the upper wall of the cylinder body to connect the flanges, and an oil passage is formed in this thick-walled portion by drilling from the end face of the mounting flange, and the oil passage is connected to the mounting flange. A blind stopper that faces the front wall of the passenger compartment or the booster and is prevented from coming out is press-fitted into the perforation provided in the opening.
以下、図面により本発明を自動車の２系統式油
圧ブレーキ作動用に適用した一実施例について説
明すると、Ｗは自動車の車室Rpとその前部のエ
ンジンルームRe間を仕切る車室前面壁で、その
前面には上向き傾斜の取付面Waが形成され、こ
の取付面Waには倍力装置ＳのブースタシエルSa
が、またその前面にはタンデム型マスタシリンダ
Ｍのシリンダ本体１がその後端の取付フランジ１
ａを介してそれぞれ直角に順次ボルト（図示せ
ず）により取付けられ、これによりシリンダ本体
１はエンジンルームReにおいて前上りの傾斜姿
勢に支持される。 Hereinafter, an embodiment in which the present invention is applied to a two-system hydraulic brake operation of an automobile will be described with reference to the drawings. W is a front wall of the vehicle interior that partitions the vehicle interior Rp and the engine room Re at the front thereof; An upwardly inclined mounting surface Wa is formed on its front surface, and a booster shell Sa of the booster S is formed on this mounting surface Wa.
However, on the front side, the cylinder body 1 of the tandem type master cylinder M is attached to the mounting flange 1 at the rear end.
The cylinder body 1 is mounted by bolts (not shown) in sequence at right angles through the cylinder a, thereby supporting the cylinder body 1 in an upwardly inclined position in the engine room Re.
車室前面壁Ｗの後面にはブラケツトWbが突設
され、これに倍力装置Ｓの入力杆Siを操作するブ
レーキペダルＰが軸支されている。 A bracket Wb is provided protruding from the rear surface of the front wall W of the vehicle interior, and a brake pedal P for operating an input rod Si of a booster S is pivotally supported on this bracket Wb.
シリンダ本体１内のシリンダ孔２には、それに
摺合する前後一対の第１および第２ピストン３，
３′により互いに独立した後部の第１油圧室４お
よび前部の第２油圧室４′が画成され、それら油
圧室４，４′の出力ポート４ａ，４a′に自動車の
２系統のブレーキ油圧回路が各個に接続され、第
１ピストン３に倍力装置Ｓの出力杆Soが連接さ
れる。 The cylinder hole 2 in the cylinder body 1 includes a pair of front and rear first and second pistons 3 that slide into the cylinder hole 2.
3' defines a first hydraulic chamber 4 at the rear and a second hydraulic chamber 4' at the front, which are independent from each other, and output ports 4a, 4a' of these hydraulic chambers 4, 4' are connected to two brake hydraulic systems of the automobile. The circuits are connected to each other, and the output rod So of the booster S is connected to the first piston 3.
シリンダ本体１の上側には油槽Ｒが設けられ
る。その油槽Ｒは、シリンダ本体１の上側に高所
側の第２油圧室４′に隣接して一体に突設した円
筒状の補助油溜５と、その補助油溜５の上端外周
に下端部を嵌合連結した透明の合成樹脂製主油溜
６とより構成され、この際、補助油溜５の底壁は
シリンダ本体１の上壁の一部と共通化される。 An oil tank R is provided above the cylinder body 1. The oil tank R includes a cylindrical auxiliary oil sump 5 integrally protruding from the upper side of the cylinder body 1 adjacent to the second hydraulic chamber 4' on the high side, and a lower end portion on the outer periphery of the upper end of the auxiliary oil sump 5. The main oil reservoir 6 is made of a transparent synthetic resin, and the bottom wall of the auxiliary oil reservoir 5 is shared with a part of the upper wall of the cylinder body 1.
主油溜６は補助油溜５よりも大容積に形成さ
れ、その上端に単一のキヤツプ８を備えている。 The main oil reservoir 6 is formed to have a larger volume than the auxiliary oil reservoir 5, and is provided with a single cap 8 at its upper end.
補助油溜５は、シリンダ本体１と一体の隔壁９
により、内部を後部の第１油溜室５ａと前部の第
２油溜室５ｂとに区画され、両油溜室５ａ，５ｂ
は共に主油溜６と連通する。こうして第２油溜室
５ｂは第２ピストン３′の前端部近傍に配され、
その底壁に第２油圧室４′の逃し孔１０′および補
給孔１１′が穿設される。 The auxiliary oil reservoir 5 is formed by a partition wall 9 that is integral with the cylinder body 1.
The interior is divided into a first oil reservoir chamber 5a at the rear and a second oil reservoir chamber 5b at the front.
both communicate with the main oil sump 6. In this way, the second oil reservoir chamber 5b is arranged near the front end of the second piston 3',
A relief hole 10' and a supply hole 11' for the second hydraulic chamber 4' are bored in the bottom wall thereof.
シリンダ本体１の上壁には、補助油溜５および
取付フランジ１ａ間を接続する厚肉部１ｂが一体
に形成され、この厚肉部１ｂには第１油溜室５ａ
を第１油圧室４の逃し孔１０および補給孔１１に
連通する油路１３がシリンダ孔２と平行に穿設さ
れる。而して、シリンダ本体１が前述のように前
上り傾斜に保持されるので、油路１３は補助油溜
５に向つて上向き傾斜となる。したがつて振動、
加熱等により該油路１３の油中に気泡が発生すれ
ば、これを直ちに補助油溜５へ誘導排出すること
ができる。 A thick wall portion 1b connecting the auxiliary oil reservoir 5 and the mounting flange 1a is integrally formed on the upper wall of the cylinder body 1, and the thick wall portion 1b has a first oil reservoir chamber 5a.
An oil passage 13 that communicates with the relief hole 10 and supply hole 11 of the first hydraulic chamber 4 is bored parallel to the cylinder hole 2 . Since the cylinder body 1 is held in an upwardly inclined position as described above, the oil passage 13 is inclined upwardly toward the auxiliary oil reservoir 5. Therefore vibration,
If bubbles are generated in the oil in the oil passage 13 due to heating or the like, they can be immediately guided and discharged to the auxiliary oil reservoir 5.
上記油路１３は、シリンダ本体１の取付フラン
ジ１ａの端面より錐を以て穿孔され、その油路１
３の、取付フランジ１ａに設けられる穿孔口Ｈ
は、そこに球状盲栓１４を打ち込んで圧入するこ
とにより閉塞される。そして、この盲栓１４は取
付フランジ１ａと接合される倍力装置Ｓのブース
タシエルSaに当接するようになつている。 The oil passage 13 is drilled with a cone from the end face of the mounting flange 1a of the cylinder body 1.
3, the perforation hole H provided in the mounting flange 1a
is closed by driving and press-fitting the spherical blind stopper 14 therein. The blind plug 14 is adapted to come into contact with the booster shell Sa of the booster S, which is joined to the mounting flange 1a.
また前記逃し孔１０および補給孔１１は厚肉部
１ｂ上面より錐を以て穿孔され、それらの穿孔口
も球状盲栓１５，１６をそれぞれ打ち込んで閉鎖
され、さらにそれら盲栓１５，１６の抜出し防止
およびシールの目的で厚肉部１ｂ上面に接着剤１
２が塗布される。 The relief hole 10 and the supply hole 11 are drilled from the upper surface of the thick walled portion 1b with a drill, and these holes are also closed by driving spherical blind plugs 15 and 16 into them, respectively, to prevent the blind plugs 15 and 16 from being pulled out. Adhesive 1 is applied to the top surface of the thick part 1b for the purpose of sealing.
2 is applied.
尚、本発明では、シリンダ本体１は倍力装置Ｓ
を介することなく車室前面壁Ｗに直接取付けるこ
ともあり、その場合、油路１３の穿孔口Ｈを塞ぐ
盲栓１４は車室前面壁Ｗに当接するようにする。 In addition, in the present invention, the cylinder body 1 is equipped with a booster S.
In some cases, it may be directly attached to the front wall W of the vehicle interior without going through the media, and in that case, the blind plug 14 that closes the perforation H of the oil passage 13 is brought into contact with the front wall W of the vehicle interior.
而してブレーキペダルＰの踏込操作により倍力
装置Ｓを作動して、その出力杆Soにより第１お
よび第２ピストン３，３′を前方（図では左方）
に押動したとき、逃し孔１０，１０′は各ピスト
ン３，３′により閉じられ、各油圧室４，４′で発
生する油圧はそれぞれ対応するブレーキ油圧回路
に伝達され、各ブレーキを作動することができ
る。また第１および第２ピストン３，３′の後退
時には、第１および第２油圧室４，４′への作動
油の補給が第１および第２油溜室５ａ，５ｂから
補給孔１１，１１′を通してそれぞれ行われ、そ
れらの過剰補給分は、逃し孔１０，１０′から第
１および第２油溜室５ａ，５ｂ側へそれぞれ戻す
ことができるが、それらの機能は従来のものと変
わらない。 Then, by depressing the brake pedal P, the booster S is activated, and its output rod So causes the first and second pistons 3 and 3' to move forward (to the left in the figure).
When pushed, the relief holes 10, 10' are closed by the respective pistons 3, 3', and the hydraulic pressure generated in each hydraulic chamber 4, 4' is transmitted to the corresponding brake hydraulic circuit to operate each brake. be able to. Furthermore, when the first and second pistons 3, 3' are retracted, the first and second hydraulic chambers 4, 4' are supplied with hydraulic oil from the first and second oil reservoir chambers 5a, 5b through the replenishment holes 11, 11. ', and the excess replenishment can be returned to the first and second oil reservoir chambers 5a, 5b through the relief holes 10, 10', respectively, but their functions are the same as in the conventional one. .
主油溜６には、そこに貯留される作動油の油面
Ｆが規定レベルＬ以下に低下したとき作動する油
面検知装置Ａが設けられる。この装置Ａはキヤツ
プ８の下面に突設されて主油溜６内に深く突入す
るスイツチ筒１７と、そのスイツチ筒１７内に収
納されて前記規定レベルＬに設置される磁気感応
型リードスイツチ１８と、スイツチ筒１７の外周
に昇降自在に嵌装され、内側にリードスイツチ１
８を閉成し得る磁石１９を埋設した環状フロート
２０とより構成され、リードスイツチ１８にはリ
ード線２１を介してランプ等の警報器２４、主ス
イツチ２５および電源２６が順次接続され、警報
器２４は車両の操縦席前面に設置され、主スイツ
チ２５は車両のエンジンスイツチの開閉に連動し
て開閉するようになつている。またスイツチ筒１
７の下端にはフロート２０が規定レベルＬ近傍以
下に降下するのを規制するストツパ２２が設けら
れる。 The main oil reservoir 6 is provided with an oil level detection device A that is activated when the oil level F of the hydraulic oil stored therein drops below a specified level L. This device A includes a switch cylinder 17 that protrudes from the lower surface of the cap 8 and plunges deeply into the main oil reservoir 6, and a magnetically sensitive reed switch 18 housed within the switch cylinder 17 and installed at the specified level L. The reed switch 1 is fitted on the outer periphery of the switch cylinder 17 so as to be able to rise and fall freely.
The reed switch 18 is connected to an alarm 24 such as a lamp via a lead wire 21, a main switch 25, and a power source 26 in order. 24 is installed in front of the driver's seat of the vehicle, and the main switch 25 is opened and closed in conjunction with the opening and closing of the engine switch of the vehicle. Also switch tube 1
A stopper 22 is provided at the lower end of the float 20 to prevent the float 20 from falling below the vicinity of the specified level L.
次にこの実施例の作用を説明すると、車両の運
転中、従つて主スイツチ２５が閉じられている状
態で、主油溜６に作動油が適量貯留されていて、
その油面Ｆが規定レベルＬより高い位置にあると
きは、その油面Ｆに浮ぶフロート２０は実線示の
ようにリードスイツチ１８から遠く上方へ離れて
いるので、リードスイツチ１８はフロート２０の
磁石１９の磁力を受けず開放状態を保つている。
従つてリード線２１に連なる警報器２４は作動し
ない。 Next, the operation of this embodiment will be explained. While the vehicle is in operation, when the main switch 25 is closed, an appropriate amount of hydraulic oil is stored in the main oil reservoir 6.
When the oil level F is higher than the specified level L, the float 20 floating on the oil level F is far away from the reed switch 18 upwards as shown by the solid line, so the reed switch 18 is moved by the magnet of the float 20. It maintains an open state without receiving the magnetic force of 19.
Therefore, the alarm 24 connected to the lead wire 21 does not operate.
ところが、いま仮に、第１油圧室４の系統の油
圧回路に漏油故障が起きたとすると、主油溜６と
補助油溜５の第１油溜室５ａ内の作動油が涸渇し
ても、補助油溜５の第２油溜室５ｂ内には作動油
がそのまま蓄えられるので、制動操作時、両ピス
トン３，３′の前進により第２油圧室４′を昇圧
し、その系統の油圧回路を正常に作動することが
できる。 However, if an oil leak failure were to occur in the hydraulic circuit of the first hydraulic chamber 4, even if the hydraulic oil in the first oil reservoir chambers 5a of the main oil reservoir 6 and the auxiliary oil reservoir 5 were depleted, Since the hydraulic oil is stored as it is in the second oil reservoir chamber 5b of the auxiliary oil reservoir 5, during braking operation, the pressure in the second hydraulic chamber 4' is increased by the advancement of both pistons 3, 3', and the hydraulic circuit of the system is increased. can operate normally.
またこの場合、主油溜６の油面Ｆが規定レベル
Ｌまで低下した時点で、フロート２０がスイツチ
筒１７に沿つて鎖線位置まで下降し、磁石１９が
リードスイツチ１８に接近してそれを閉成するた
め、警報器２４が直ちに電源２６より通電されて
作動し、車両の操縦者に油面Ｆの異常低下を警報
する。そしてさらに油面Ｆが低下しても、フロー
ト２０はストツパ２２に受止められ規定レベルＬ
の近傍に保持されるので、リードスイツチ１８の
閉成状態、すなわち警報状態を持続することがで
きる。 In this case, when the oil level F in the main oil sump 6 drops to the specified level L, the float 20 moves down along the switch cylinder 17 to the chain line position, and the magnet 19 approaches the reed switch 18 and closes it. Therefore, the alarm device 24 is immediately energized by the power source 26 and activated to warn the operator of the vehicle of the abnormal drop in the oil level F. Even if the oil level F further decreases, the float 20 is stopped by the stopper 22 and reaches the specified level L.
Since the reed switch 18 is maintained close to , the closed state of the reed switch 18, that is, the alarm state can be maintained.
第２油圧室４′の系統の油圧回路が故障した場
合には、補助油溜５の第１油溜室５ａに作動油が
残留する外は、上記と同様の作用を生じる。 If the hydraulic circuit of the second hydraulic chamber 4' system fails, the same effect as described above will occur, except that hydraulic oil remains in the first oil reservoir chamber 5a of the auxiliary oil reservoir 5.
このようなタンデム型マスタシリンダＭにおい
て、補助油溜５はシリンダ本体１と一体に成形さ
れると共に、補助油溜５の底壁はシリンダ本体１
の上壁と共通化されるので、補助油溜５をシリン
ダ本体１との最接近位置に配置することができ、
油槽Ｒの容量を減少させずにその高さを充分下げ
ることができる。 In such a tandem type master cylinder M, the auxiliary oil reservoir 5 is molded integrally with the cylinder body 1, and the bottom wall of the auxiliary oil reservoir 5 is formed integrally with the cylinder body 1.
Since it is shared with the upper wall, the auxiliary oil reservoir 5 can be placed at the closest position to the cylinder body 1,
The height of the oil tank R can be sufficiently lowered without reducing its capacity.
またシリンダ本体１の厚肉部１ｂに設けられる
油路１３は、取付フランジ１ａの端面からの穿孔
により形成されるので、錐加工のための平担面を
シリンダ本体に特別に形成する必要もなく、厚肉
部１ｂの存在と相俟つて油路１３の形状を容易に
行うことができる。 In addition, since the oil passage 13 provided in the thick wall portion 1b of the cylinder body 1 is formed by drilling from the end face of the mounting flange 1a, there is no need to specially form a flat surface for drilling on the cylinder body. Coupled with the presence of the thick wall portion 1b, the shape of the oil passage 13 can be easily formed.
しかも厚肉部１ｂは補助油溜５、シリンダ本体
１及び取付フランジ１ａの三者を一体に連結する
ので、取付フランジ１の支持剛性を高めることが
できる。 Furthermore, since the thick portion 1b integrally connects the auxiliary oil reservoir 5, the cylinder body 1, and the mounting flange 1a, the support rigidity of the mounting flange 1 can be increased.
さらに、油路１３の穿孔口Ｈに嵌入された盲栓
１４は、取付フランジ１ａと接合される倍力装置
Ｓ等に当接するようになつているので、振動等に
より盲栓１４がたとえ緩んでも、穿孔口Ｈから抜
出すことはなく、穿孔口Ｈを閉鎖し続けることが
できる。 Furthermore, since the blind plug 14 fitted into the perforation H of the oil passage 13 comes into contact with the booster S etc. that is connected to the mounting flange 1a, even if the blind plug 14 becomes loose due to vibration etc. , the perforation H can be kept closed without being pulled out from the perforation H.
以上のように本発明によれば、シリンダ本体及
び補助油溜を、前者の上壁の一部と後者の底壁と
が共通化するように一体に成形したので、補助油
溜をシリンダ本体への最接近位置に配置すること
ができ、したがつて主油溜の高さが充分に下がつ
て、各種車両のボンネツトとの干渉を回避するこ
とができる。 As described above, according to the present invention, the cylinder body and the auxiliary oil reservoir are integrally formed so that a part of the upper wall of the former and the bottom wall of the latter are common, so that the auxiliary oil reservoir is attached to the cylinder body. Therefore, the height of the main oil reservoir can be sufficiently lowered to avoid interference with the bonnet of various vehicles.
また前記補助油溜と、シリンダ本体後端の取付
フランジとの間を接続するようにシリンダ本体の
上壁に厚肉部を一体に形成したので、該厚肉部に
よつてシリンダ本体上壁の剛性を補助油溜からシ
リンダ本体後端に至る広範囲に亘つて十分に高め
ることができ、取付フランジのシリンダ本体に対
する支持剛性も強化されるから、シリンダ本体の
振動防止に有効である。 In addition, a thick wall portion is integrally formed on the top wall of the cylinder body so as to connect the auxiliary oil reservoir to the mounting flange at the rear end of the cylinder body. The rigidity can be sufficiently increased over a wide range from the auxiliary oil reservoir to the rear end of the cylinder body, and the supporting rigidity of the mounting flange to the cylinder body is also strengthened, which is effective in preventing vibration of the cylinder body.
さらに前記厚肉部に前記取付フランジの端面か
らの穿孔により前記油路を形成し、この油路の、
前記取付フランジに設けられる穿孔口は、前記車
室前面壁または倍力装置に対面して抜止めされる
盲栓を圧入したので、前記厚肉部の存在と取付フ
ランジ端面からの穿孔とにより、シリンダ本体へ
の油路の形成が容易であり、その上、取付フラン
ジを車体の車室前面壁または倍力装置に接合する
だけで、油路の穿孔口に圧入された盲栓を車室前
面壁または倍力装置によつて確実に抜止めするこ
とができ、専用の抜止め手段が不要となつて構造
の簡素化にも寄与し得る。また上記油路の穿孔口
は、比較的高剛性且つ大径の前記取付フランジに
設けられるので、大きな穿孔口に盲栓を強い力で
圧入しても該穿孔口周囲にクラツクが生じる惧れ
はなく、その圧入作業を的確に行い得ると共に油
路の通路断面積を十分に確保し得るものである。 Further, the oil passage is formed in the thick part by drilling from the end face of the mounting flange, and the oil passage is
The hole provided in the mounting flange is press-fitted with a blind plug that faces the front wall of the vehicle interior or the booster and is prevented from coming out, so due to the presence of the thick wall part and the hole formed from the end surface of the mounting flange, It is easy to form an oil passage to the cylinder body, and by simply joining the mounting flange to the front wall of the vehicle compartment or the booster, the blind plug press-fitted into the oil passage hole can be attached to the front of the compartment. It can be reliably prevented from slipping out by a wall or a booster, and a dedicated slipping-preventing means is not required, which can also contribute to the simplification of the structure. Furthermore, since the perforation of the oil passage is provided on the mounting flange which has relatively high rigidity and a large diameter, there is no risk of cracks occurring around the perforation even if a blind plug is press-fitted into the large perforation with strong force. Therefore, the press-fitting operation can be performed accurately and a sufficient cross-sectional area of the oil passage can be ensured.
第１図は本発明の一実施例の要部縦断側面図、
第２図は第１図の−矢視図である。
Ｈ……穿孔口、Ｍ……マスタシリンダ、Ｒ……
油槽、Re……エンジンルーム、Ｓ……倍力装置、
Sa……ブースタシエル、Ｗ……車室前面壁、１
……シリンダ本体、１ａ……取付フランジ、１ｂ
……厚肉部、２……シリンダ孔、３……第１ピス
トン、３′……第２ピストン、４……第１油圧室、
４′……第２油圧室、５……補助油溜、５ａ……
第１油溜室、５ｂ……第２油溜室、６……主油
溜、９……隔壁、１１，１１′……補給孔、１３
……油路、１４……盲栓。
FIG. 1 is a vertical sectional side view of the main part of an embodiment of the present invention;
FIG. 2 is a view taken along the - arrow in FIG. H...Drilling port, M...Master cylinder, R...
Oil tank, Re... engine room, S... booster,
Sa...Booster shell, W...Front wall of passenger compartment, 1
...Cylinder body, 1a...Mounting flange, 1b
... Thick wall part, 2 ... Cylinder hole, 3 ... First piston, 3' ... Second piston, 4 ... First hydraulic chamber,
4'...Second hydraulic chamber, 5...Auxiliary oil reservoir, 5a...
First oil sump chamber, 5b... Second oil sump chamber, 6... Main oil sump, 9... Partition wall, 11, 11'... Supply hole, 13
...Oil channel, 14...Blind plug.
Claims (1)
ルームReで車室前面壁Ｗに直接または倍力装置
Ｓを介して接合されるシリンダ本体１を有し、こ
のシリンダ本体１のシリンダ孔２内に、該シリン
ダ孔２に摺合する一対のピストン３，３′により
各独立した後部の第１油圧室４および前部の第２
油圧室４′を画成し、またシリンダ本体１の上側
には、隔壁９により区画された第１及び第２油溜
室５ａ，５ｂを有する補助油溜５を前記第２油圧
室４′に隣接して連設し、さらにこの補助油溜５
の上端に前記両油溜室５ａ，５ｂと連通する主油
溜６を連設し、一方の前記油溜室５ｂ底面に第２
油圧室４′の補給孔１１′を開口する一方、他方の
前記油溜室５ａを油路１３を介して第１油圧室４
の補給孔１１に連通した、自動車のタンデム型マ
スタシリンダにおいて、前記シリンダ本体１及び
補助油溜５を、前者の上壁の一部と後者の底壁と
が共通化するように一体に成形し、この補助油溜
５及び前記取付フランジ１ａ間を接続するように
シリンダ本体１の上壁に厚肉部１ｂを一体に形成
すると共に、この厚肉部１ｂに前記取付フランジ
１ａの端面からの穿孔により前記油路１３を形成
し、この油路１３の、前記取付フランジ１ａに設
けられる穿孔口Ｈには、前記車室前面壁Ｗまたは
倍力装置に対面して抜止めされる盲栓１４を圧入
したことを特徴とする、自動車のタンデム型マス
タシリンダ。1. The mounting flange 1a at the rear end has a cylinder body 1 that is joined to the front wall W of the vehicle interior directly or via a booster S in the engine room Re of the automobile, and in the cylinder hole 2 of the cylinder body 1, A pair of pistons 3 and 3' that slide into the cylinder hole 2 create independent first hydraulic chambers 4 at the rear and second hydraulic chambers at the front.
An auxiliary oil reservoir 5 defining a hydraulic chamber 4' and having first and second oil reservoir chambers 5a and 5b separated by a partition wall 9 on the upper side of the cylinder body 1 is connected to the second hydraulic chamber 4'. This auxiliary oil reservoir 5 is installed adjacently and in series.
A main oil sump 6 communicating with both oil sump chambers 5a and 5b is provided at the upper end, and a second oil sump 6 is provided at the bottom of one of the oil sump chambers 5b.
While the supply hole 11' of the hydraulic chamber 4' is opened, the other oil reservoir chamber 5a is connected to the first hydraulic chamber 4 through the oil passage 13.
In the tandem type master cylinder of an automobile, which communicates with the supply hole 11 of the cylinder body 1 and the auxiliary oil reservoir 5, the cylinder body 1 and the auxiliary oil reservoir 5 are integrally molded so that a part of the upper wall of the former and a bottom wall of the latter are common. A thick wall portion 1b is integrally formed on the upper wall of the cylinder body 1 so as to connect the auxiliary oil reservoir 5 and the mounting flange 1a, and a hole is formed in the thick wall portion 1b from the end surface of the mounting flange 1a. The oil passage 13 is formed, and the perforation H of the oil passage 13 provided in the mounting flange 1a is provided with a blind plug 14 that faces the front wall W of the vehicle interior or the booster and is prevented from coming out. A tandem-type master cylinder for automobiles that is press-fitted.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15951179A JPS5682653A (en) | 1979-12-08 | 1979-12-08 | Tandem-type master cylinder of automobile |
| GB8039137A GB2067251B (en) | 1979-12-08 | 1980-12-05 | Tandem type master cylinder |
| US06/623,333 US4628691A (en) | 1979-12-08 | 1984-06-21 | Tandem type master cylinder |
| US06/633,110 US4651529A (en) | 1979-12-08 | 1984-07-20 | Tandem type master cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15951179A JPS5682653A (en) | 1979-12-08 | 1979-12-08 | Tandem-type master cylinder of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5682653A JPS5682653A (en) | 1981-07-06 |
| JPS6312830B2 true JPS6312830B2 (en) | 1988-03-22 |
Family
ID=15695364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15951179A Granted JPS5682653A (en) | 1979-12-08 | 1979-12-08 | Tandem-type master cylinder of automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5682653A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5850057U (en) * | 1981-09-30 | 1983-04-05 | 日信工業株式会社 | Reservoir for master cylinder |
| JPS5929348U (en) * | 1982-08-18 | 1984-02-23 | 日信工業株式会社 | Rapid filling master cylinder |
-
1979
- 1979-12-08 JP JP15951179A patent/JPS5682653A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5682653A (en) | 1981-07-06 |
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