JP2019202677A - Master cylinder - Google Patents

Master cylinder Download PDF

Info

Publication number
JP2019202677A
JP2019202677A JP2018099864A JP2018099864A JP2019202677A JP 2019202677 A JP2019202677 A JP 2019202677A JP 2018099864 A JP2018099864 A JP 2018099864A JP 2018099864 A JP2018099864 A JP 2018099864A JP 2019202677 A JP2019202677 A JP 2019202677A
Authority
JP
Japan
Prior art keywords
filter
opening
diameter
reservoir
master 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.)
Pending
Application number
JP2018099864A
Other languages
Japanese (ja)
Inventor
伸哉 河西
Shinya Kasai
伸哉 河西
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.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Automotive Systems 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 Hitachi Automotive Systems Ltd filed Critical Hitachi Automotive Systems Ltd
Priority to JP2018099864A priority Critical patent/JP2019202677A/en
Publication of JP2019202677A publication Critical patent/JP2019202677A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

To provide a master cylinder which can inhibit a filter from being inadvertently removed while enabling easy removal of the filter from a reservoir.SOLUTION: A master cylinder has: a reservoir 13 which stores a working fluid injected from an opening 26; a filter 51 provided at the opening 26; and a master cylinder body which receives supply of the working fluid from the reservoir 13. The filter 51 has: a filter large diameter part 52 having a larger diameter than an inner diameter of the opening 26; a filter small diameter part 54 having a smaller diameter than the inner diameter of the opening 26; and an engagement part 55 which is formed having a diameter that is smaller than the filter large diameter part 52 and larger than the filter small diameter part 54 and restricts movement from the opening 26.SELECTED DRAWING: Figure 4

Description

本発明は、車両の制動用シリンダへ液圧を供給するマスタシリンダに関する。   The present invention relates to a master cylinder that supplies hydraulic pressure to a brake cylinder of a vehicle.

マスタシリンダには、作動液を貯留するリザーバと、リザーバに注入される作動液を濾過するフィルタとを有するものがある（例えば特許文献１，２参照）。   Some master cylinders have a reservoir for storing hydraulic fluid and a filter for filtering the hydraulic fluid injected into the reservoir (see, for example, Patent Documents 1 and 2).

特開平１１−７８８５５号公報JP 11-78855 A 実開平４−４３５５９号公報Japanese Utility Model Publication No. 4-43559

フィルタのリザーバからの取り外しを容易とする一方、不用意な外れを抑制することが望まれている。   While it is easy to remove the filter from the reservoir, it is desired to prevent inadvertent detachment.

したがって、本発明は、フィルタのリザーバからの取り外しを容易としつつ不用意な外れを抑制することが可能なマスタシリンダの提供を目的とする。   Therefore, an object of the present invention is to provide a master cylinder capable of easily removing the filter from the reservoir while suppressing inadvertent detachment.

上記目的を達成するために、本発明に係るマスタシリンダは、フィルタが、リザーバの開口部の内径よりも大径のフィルタ大径部と、前記開口部の内径よりも小径のフィルタ小径部と、前記フィルタ大径部より小径であり、前記フィルタ小径部より大径に形成され、前記開口部からの移動を規制する係止部と、を有する、構成とした。   In order to achieve the above object, the master cylinder according to the present invention includes a filter having a filter large-diameter portion larger than the inner diameter of the reservoir opening, a filter small-diameter portion smaller than the inner diameter of the opening, And a locking portion that is smaller in diameter than the large-diameter portion of the filter, larger in diameter than the small-diameter portion of the filter, and restricts movement from the opening.

本発明に係るマスタシリンダによれば、フィルタのリザーバからの取り外しを容易としつつ不用意な外れを抑制することが可能となる。   According to the master cylinder of the present invention, it is possible to suppress inadvertent detachment while facilitating removal of the filter from the reservoir.

第１実施形態のマスタシリンダを示す正面図である。It is a front view which shows the master cylinder of 1st Embodiment. 第１実施形態のマスタシリンダの要部を示す正断面図である。It is a front sectional view showing the principal part of the master cylinder of the first embodiment. 第１実施形態のマスタシリンダの要部を示す正断面図である。It is a front sectional view showing the principal part of the master cylinder of the first embodiment. 第１実施形態のマスタシリンダの要部を示す正断面図である。It is a front sectional view showing the principal part of the master cylinder of the first embodiment. 第２実施形態のマスタシリンダの要部を示すもので、（ａ）は正断面図、（ｂ）は（ａ）のＢ１矢視図である。The principal part of the master cylinder of 2nd Embodiment is shown, (a) is a front sectional view, (b) is a B1 arrow directional view of (a). 第２実施形態のマスタシリンダの要部を示すもので、（ａ）は正断面図、（ｂ）は（ａ）のＢ２矢視図である。The principal part of the master cylinder of 2nd Embodiment is shown, (a) is front sectional drawing, (b) is B2 arrow directional view of (a).

［第１実施形態］
本発明に係る第１実施形態を図１〜図４に基づいて説明する。図１に示すように、第１実施形態のマスタシリンダ１１は、マスタシリンダ本体１２と、リザーバ１３とを有している。マスタシリンダ本体１２は、図示略のブレーキペダルの操作量に応じた力が図示略のブレーキブースタの出力軸を介して導入されるもので、ブレーキペダルの操作量に応じた作動液圧を発生させて車両の制動用シリンダへ供給する。リザーバ１３は、作動液を貯留するものであり、貯留している作動液をマスタシリンダ本体１２に供給する。言い換えれば、マスタシリンダ本体１２は、リザーバ１３から作動液の供給を受ける。 [First Embodiment]
A first embodiment according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the master cylinder 11 of the first embodiment has a master cylinder body 12 and a reservoir 13. In the master cylinder body 12, a force corresponding to an operation amount of a brake pedal (not shown) is introduced via an output shaft of a brake booster (not shown), and generates a hydraulic pressure corresponding to the operation amount of the brake pedal. Supplied to the brake cylinder of the vehicle. The reservoir 13 stores hydraulic fluid and supplies the stored hydraulic fluid to the master cylinder body 12. In other words, the master cylinder body 12 receives the supply of hydraulic fluid from the reservoir 13.

マスタシリンダ１１は、そのマスタシリンダ本体１２において車両の車体に取り付けられることになる。以下、マスタシリンダ１１を車体に取り付けられた状態をもって説明する。以下の説明において、「前」は、車体前後方向の前を、「後」は、車体前後方向の後をそれぞれ示す。   The master cylinder 11 is attached to the vehicle body of the vehicle in the master cylinder body 12. Hereinafter, the master cylinder 11 will be described with being attached to the vehicle body. In the following description, “front” indicates the front in the vehicle longitudinal direction, and “rear” indicates the rear in the vehicle longitudinal direction.

リザーバ１３は、マスタシリンダ本体１２の鉛直方向上側に取り付けられる容器状のリザーバ本体２１と、リザーバ本体２１に対し着脱可能なキャップ２２とを有している。リザーバ本体２１は、作動液を貯留する貯留部２５と、貯留部２５の前端上部に設けられて外部と貯留部２５内とを連通する筒状の開口部２６とを有している。キャップ２２は、開口部２６に着脱可能に取り付けられている。   The reservoir 13 includes a container-like reservoir main body 21 that is attached to the upper side of the master cylinder main body 12 in the vertical direction, and a cap 22 that can be attached to and detached from the reservoir main body 21. The reservoir main body 21 includes a reservoir 25 that stores hydraulic fluid, and a cylindrical opening 26 that is provided at the upper front end of the reservoir 25 and communicates the outside with the interior of the reservoir 25. The cap 22 is detachably attached to the opening 26.

リザーバ本体２１は、その貯留部２５が、水平に広がる天井部３１を有する貯留本体部３２と、天井部３１の前端部から上方に突出する突出部３３とを有している。突出部３３は、その上部前側に前側ほど下側に位置するように傾斜して広がる根元部３５を有しており、開口部２６は、この根元部３５から根元部３５に垂直に、前側ほど上側に位置するように延出している。開口部２６は、前方かつ上方に開口している。キャップ２２は、開口部２６の先端部に取り付けられて開口部２６を閉塞し、開口部２６から取り外されて開口部２６を開口させる。リザーバ１３は、開口部２６から注入される作動液を貯留部２５に貯留する。   The reservoir body 21 has a storage body portion 32 having a ceiling portion 31 that extends horizontally, and a protruding portion 33 that protrudes upward from the front end portion of the ceiling portion 31. The projecting portion 33 has a root portion 35 that is inclined and spreads so that the front side is located on the lower front side of the upper portion, and the opening 26 is perpendicular to the root portion 35 from the root portion 35 and toward the front side. It extends so as to be located on the upper side. The opening 26 opens forward and upward. The cap 22 is attached to the tip of the opening 26 to close the opening 26 and is removed from the opening 26 to open the opening 26. The reservoir 13 stores the hydraulic fluid injected from the opening 26 in the storage unit 25.

図２に示すように、開口部２６は、貯留部２５の突出部３３の根元部３５から外側に延出する一定内径の円筒状の根元側円筒状部４１と、根元側円筒状部４１の外端縁部から軸方向の外方に、外方ほど内径が大径となるように広がるテーパ筒状のテーパ筒状部４２と、テーパ筒状部４２の根元側円筒状部４１とは反対側の端縁部から根元側円筒状部４１とは反対方向に延出する円筒状の先端側円筒状部４３とを有している。根元側円筒状部４１、テーパ筒状部４２および先端側円筒状部４３は、それぞれの少なくとも内周面が同軸状に配置されている。根元側円筒状部４１の内径は、先端側円筒状部４３の内径よりも小径となっている。   As shown in FIG. 2, the opening 26 includes a cylindrical root-side cylindrical portion 41 having a constant inner diameter that extends outward from the root portion 35 of the protruding portion 33 of the storage portion 25, and a root-side cylindrical portion 41. The tapered cylindrical portion 42 that expands outward in the axial direction from the outer end edge so that the inner diameter becomes larger toward the outer side, and the root-side cylindrical portion 41 of the tapered cylindrical portion 42 are opposite to each other. It has a cylindrical distal end side cylindrical portion 43 that extends in the opposite direction from the root side cylindrical portion 41 from the side edge. The root-side cylindrical portion 41, the tapered cylindrical portion 42, and the distal-end-side cylindrical portion 43 are arranged so that at least the inner peripheral surfaces thereof are coaxial. The inner diameter of the root side cylindrical portion 41 is smaller than the inner diameter of the distal end side cylindrical portion 43.

貯留部２５は、根元部３５から内側に延出する一定内径の円筒状の内側円筒状部４５を有している。内側円筒状部４５は、根元側円筒状部４１と連続する円筒状であり、根元側円筒状部４１と同軸同径の一定内径となっている。   The storage part 25 has a cylindrical inner cylindrical part 45 having a constant inner diameter that extends inward from the root part 35. The inner cylindrical portion 45 has a cylindrical shape that is continuous with the root-side cylindrical portion 41 and has a constant inner diameter that is coaxial with the root-side cylindrical portion 41.

マスタシリンダ１１は、リザーバ本体２１の開口部２６に設けられるフィルタ５１を有している。フィルタ５１は、リザーバ１３とは別体であり、円筒状のフィルタ大径部５２と、フィルタ大径部５２の軸方向の一端縁部からフィルタ大径部５２から離れるほど外径が小径となるように窄まって延出するテーパ筒状のフィルタテーパ部５３と、フィルタテーパ部５３のフィルタ大径部５２とは反対側の端縁部からフィルタ大径部５２とは反対方向に延出する円筒状のフィルタ小径部５４と、フィルタ小径部５４のフィルタテーパ部５３とは反対側の端縁部から径方向外方および内方に広がる円板状の係止部５５とを有している。フィルタ大径部５２、フィルタテーパ部５３、フィルタ小径部５４および係止部５５は、それぞれの少なくとも外周面が同軸状に配置されている。フィルタ小径部５４は、これよりも大径のフィルタ大径部５２および係止部５５の間にある。   The master cylinder 11 has a filter 51 provided in the opening 26 of the reservoir body 21. The filter 51 is separate from the reservoir 13, and the outer diameter of the filter 51 decreases as the distance from the large-diameter portion 52 increases from the cylindrical large-diameter portion 52 and one end edge of the filter large-diameter portion 52 in the axial direction. The taper cylindrical filter taper portion 53 that narrows and extends in this manner, and the filter taper portion 53 extends in the direction opposite to the filter large diameter portion 52 from the edge of the filter taper portion 53 opposite to the filter large diameter portion 52. It has a cylindrical filter small-diameter portion 54 and a disc-shaped locking portion 55 that extends radially outward and inward from the edge of the filter small-diameter portion 54 on the side opposite to the filter taper portion 53. . The filter large-diameter portion 52, the filter taper portion 53, the filter small-diameter portion 54, and the locking portion 55 are arranged so that at least the outer peripheral surfaces thereof are coaxial. The filter small-diameter portion 54 is located between the filter large-diameter portion 52 and the locking portion 55 having a larger diameter.

フィルタ大径部５２は、外径が、開口部２６の最小内径である根元側円筒状部４１およびこれと同径の内側円筒状部４５の内径よりも大径となっており、先端側円筒状部４３の内径よりも小径となっている。フィルタテーパ部５３は、少なくとも外周面が、テーパ筒状部４２の内周面と同等のテーパとなっている。   The filter large-diameter portion 52 has an outer diameter larger than the inner diameter of the root-side cylindrical portion 41 that is the minimum inner diameter of the opening 26 and the inner cylindrical portion 45 having the same diameter, and the tip-side cylinder The diameter is smaller than the inner diameter of the shape portion 43. At least the outer peripheral surface of the filter taper portion 53 has a taper equivalent to the inner peripheral surface of the tapered tubular portion 42.

フィルタ小径部５４は、その外径が、フィルタ大径部５２の外径よりも小径であり、根元側円筒状部４１および内側円筒状部４５の内径よりも小径となっている。フィルタ小径部５４の軸方向長さは、根元側円筒状部４１および内側円筒状部４５を合わせた軸方向長さよりも若干長くなっている。フィルタ小径部５４には、径方向の内外を連通するメッシュ状の濾過部６１が周方向に部分的に形成されている。   The outer diameter of the filter small-diameter portion 54 is smaller than the outer diameter of the filter large-diameter portion 52 and smaller than the inner diameters of the root-side cylindrical portion 41 and the inner cylindrical portion 45. The axial length of the filter small diameter portion 54 is slightly longer than the axial length of the base cylindrical portion 41 and the inner cylindrical portion 45 combined. The filter small-diameter portion 54 is partially formed in the circumferential direction with a mesh-like filtration portion 61 that communicates the inside and outside in the radial direction.

係止部５５は、フィルタ５１の全周にわたって連続して形成されており、その外径が、フィルタ小径部５４の外径よりも大径で、フィルタ大径部５２の外径よりも小径となっている。係止部５５は、その外径が、根元側円筒状部４１および内側円筒状部４５の内径よりも若干小径となっている。すなわち、係止部５５は、フィルタ大径部５２より小径であり、フィルタ小径部５４より大径である。   The locking portion 55 is formed continuously over the entire circumference of the filter 51, and has an outer diameter larger than the outer diameter of the filter small diameter portion 54 and smaller than the outer diameter of the filter large diameter portion 52. It has become. The outer diameter of the locking portion 55 is slightly smaller than the inner diameters of the root side cylindrical portion 41 and the inner cylindrical portion 45. That is, the locking portion 55 has a smaller diameter than the filter large diameter portion 52 and a larger diameter than the filter small diameter portion 54.

フィルタ５１は、係止部５５を先頭にして、開口部２６の外から開口部２６内に挿入されることになり、フィルタテーパ部５３において開口部２６のテーパ筒状部４２に当接して、それ以上の挿入が規制される。フィルタ５１は、フィルタテーパ部５３が全周にわたって開口部２６のテーパ筒状部４２に当接した状態では、開口部２６内に、開口部２６と同軸状に配置されることになる。フィルタ５１は、例えば、キャップ２２が開口部２６に取り付けられると、キャップ２２に設けられた押圧部６５で押さえられてテーパ筒状部４２に全周にわたって当接した状態を維持する。   The filter 51 is inserted into the opening 26 from the outside of the opening 26 with the locking portion 55 as the head, and comes into contact with the tapered cylindrical portion 42 of the opening 26 at the filter taper 53. Further insertion is restricted. The filter 51 is disposed coaxially with the opening 26 in the opening 26 in a state where the filter taper 53 is in contact with the tapered cylindrical portion 42 of the opening 26 over the entire circumference. For example, when the cap 22 is attached to the opening portion 26, the filter 51 is pressed by a pressing portion 65 provided in the cap 22 and maintains a state in which the filter 51 is in contact with the tapered tubular portion 42 over the entire circumference.

キャップ２２が開口部２６から取り外されると、フィルタ５１は、開口部２６から外に引き抜き可能となる。フィルタ５１は、係止部５５の全体が内側円筒状部４５の径方向内側の範囲内にある状態では、図３に示すように外に引き抜き可能となる一方、係止部５５の一部が内側円筒状部４５の径方向内側の範囲外にあると、図４に示すように、係止部５５が、リザーバ１３の内側円筒状部４５の軸方向の内端部６８に係止されて引き抜き、すなわち開口部２６からの移動を規制する状態となる。   When the cap 22 is removed from the opening 26, the filter 51 can be pulled out from the opening 26. The filter 51 can be pulled out as shown in FIG. 3 in a state where the entire locking portion 55 is within the radially inner range of the inner cylindrical portion 45, while a portion of the locking portion 55 is If the inner cylindrical portion 45 is outside the radial inner range, the locking portion 55 is locked to the axial inner end 68 of the inner cylindrical portion 45 of the reservoir 13 as shown in FIG. Drawing, that is, a state in which movement from the opening 26 is restricted.

リザーバ１３に作動液を真空充填等で注入する際には、キャップ２２をリザーバ本体２１から取り外して、作動液を注入するガンノズル７１を、リザーバ本体２１の開口部２６に挿入し、フィルタ５１のフィルタ小径部５４の途中位置まで差し込む。この状態で、ガンノズル７１から作動液を放出する。すると、ガンノズル７１から放出された作動液は、フィルタ５１の濾過部６１を通過して、貯留部２５内に至る。このとき、作動液に混入していた異物は、濾過部６１に引っかかって貯留部２５内に至ることが規制される。   When injecting the hydraulic fluid into the reservoir 13 by vacuum filling or the like, the cap 22 is removed from the reservoir main body 21, and a gun nozzle 71 for injecting the hydraulic fluid is inserted into the opening 26 of the reservoir main body 21. Insert it to the middle of the small diameter portion 54. In this state, hydraulic fluid is discharged from the gun nozzle 71. Then, the hydraulic fluid discharged from the gun nozzle 71 passes through the filtration unit 61 of the filter 51 and reaches the storage unit 25. At this time, the foreign matter mixed in the hydraulic fluid is restricted from being caught by the filtering unit 61 and reaching the storage unit 25.

作業者は、上記のようにガンノズル７１をフィルタ５１に挿入し作動液の充填を行った後、ガンノズル７１を引き抜くことになるが、その際に、例えばガンノズル７１を開口部２６の中心線に対し斜め方向に引き抜こうとすると、ガンノズル７１に引っかかってフィルタ５１がガンノズル７１とともに引き抜き方向に移動しようとすることがある。引き抜き時のガンノズル７１の姿勢はほぼ一定しないことから、フィルタ５１がガンノズル７１とともに、例えば図４に示すように径方向にずれる。すると、係止部５５が内側円筒状部４５の径方向内側の範囲から外にずれて、内側円筒状部４５の内端部６８に係止されて引き抜き、すなわち開口部２６からの移動を規制する状態となる。したがって、フィルタ５１が、作業者により引き抜かれるガンノズル７１とともに引き抜き方向に移動しようとしても、係止部５５が内側円筒状部４５に当接して移動が規制され、よってガンノズル７１から離れてリザーバ本体２１内に留まる。   The operator inserts the gun nozzle 71 into the filter 51 and fills the working fluid as described above, and then pulls out the gun nozzle 71. At this time, for example, the gun nozzle 71 is moved with respect to the center line of the opening 26. If an attempt is made to pull out in an oblique direction, the filter 51 may be caught by the gun nozzle 71 and move in the pulling direction together with the gun nozzle 71. Since the posture of the gun nozzle 71 at the time of pulling out is not substantially constant, the filter 51 is shifted together with the gun nozzle 71 in the radial direction, for example, as shown in FIG. Then, the latching portion 55 is displaced from the radially inner range of the inner cylindrical portion 45, and is latched and pulled out by the inner end portion 68 of the inner cylindrical portion 45, that is, the movement from the opening 26 is restricted. It becomes a state to do. Therefore, even if the filter 51 tries to move in the pulling direction together with the gun nozzle 71 pulled out by the operator, the movement of the locking portion 55 abuts on the inner cylindrical portion 45 and is restricted from moving. Stay inside.

その後、キャップ２２が開口部２６に取り付けられると、フィルタ５１は、キャップ２２に設けられた押圧部６５で押されて、フィルタテーパ部５３においてテーパ筒状部４２に当接し、開口部２６と同軸状に配置される状態になって停止する。   Thereafter, when the cap 22 is attached to the opening portion 26, the filter 51 is pushed by the pressing portion 65 provided in the cap 22, abuts against the tapered tubular portion 42 at the filter taper portion 53, and is coaxial with the opening portion 26. Stop in a state of being arranged in a shape.

他方、濾過部６１の目詰まり解消等のため、フィルタ５１をリザーバ本体２１から取り外す場合、作業者は、キャップ２２を開口部２６から取り外し、フィルタ５１を、係止部５５が内側円筒状部４５の径方向内側の範囲内にある状態として引いて、係止部５５を内側円筒状部４５内に入り込ませる。その後は、係止部５５が内側円筒状部４５および根元側円筒状部４１で案内されることになる。よって、フィルタ５１をリザーバ本体２１から円滑に取り外すことができる。   On the other hand, when removing the filter 51 from the reservoir main body 21 in order to eliminate clogging of the filtration part 61, the operator removes the cap 22 from the opening 26, and the filter 51 is attached to the inner cylindrical part 45. The locking portion 55 is caused to enter the inner cylindrical portion 45 by pulling it as being in the radially inner range. Thereafter, the locking portion 55 is guided by the inner cylindrical portion 45 and the root cylindrical portion 41. Therefore, the filter 51 can be smoothly removed from the reservoir body 21.

上記した特許文献１には、給油口の内側に上部突起および下部突起を形成し、これらの間にフィルタを保持してフィルタの外れを規制するマスタシリンダ用リザーバが開示されている。また、上記した特許文献２には、フィルタの外周に突起を設け、開口部に突起に係合する穴を設け、これらを係合させる作動液リザーバが開示されている。これらの構造では、フィルタがリザーバに凹凸嵌合しているため、フィルタの不用意な外れを抑制することができるものの、凹凸嵌合を解除する必要があるため、フィルタのリザーバからの取り外しが面倒になってしまう。また、フィルタをリザーバに凹凸嵌合により固定する構造であると、フィルタあるいはリザーバに凹凸嵌合のための凹部あるいは凸部を形成する必要があり、フィルタおよびリザーバの成形時に樹脂の流れに対しアンダカットとなる凹部あるいは凸部を設ける必要があって、金型構造が複雑になる。よって、金型コストが増大してしまう。   Patent Document 1 described above discloses a master cylinder reservoir in which an upper protrusion and a lower protrusion are formed on the inner side of an oil filler port, and a filter is held between the upper protrusion and a lower protrusion to restrict the removal of the filter. Further, Patent Document 2 described above discloses a hydraulic fluid reservoir in which protrusions are provided on the outer periphery of the filter, holes that engage with the protrusions are provided in the opening, and these are engaged. In these structures, since the filter is unevenly fitted to the reservoir, it is possible to suppress inadvertent detachment of the filter, but it is necessary to release the uneven fitting, so it is troublesome to remove the filter from the reservoir. Become. In addition, if the filter is fixed to the reservoir by concave / convex fitting, it is necessary to form a concave or convex portion for concave / convex fitting in the filter or reservoir. It is necessary to provide a concave or convex portion to be cut, which complicates the mold structure. Therefore, the mold cost increases.

これに対して、第１実施形態のマスタシリンダ１１は、フィルタ５１が、リザーバ１３の開口部２６の内径よりも大径のフィルタ大径部５２と、開口部２６の内径よりも小径のフィルタ小径部５４と、フィルタ大径部５２より小径であり、フィルタ小径部５４より大径に形成され、リザーバ１３に係止されて開口部２６からの移動を規制する係止部５５とを有する。このため、作業者が意思をもってフィルタ５１をリザーバ１３の開口部２６から取り外す場合、係止部５５を内側円筒状部４５の内側範囲内に配置して引き抜けば、取り外すことができる。また、フィルタ５１がリザーバ１３の開口部２６から不用意に取り外されそうになる場合には、大抵は係止部５５が内側円筒状部４５に対し径方向にずれることになり、よって、係止部５５がリザーバ１３に係止されて開口部２６からの移動を規制する状態になり、取り外しが規制される。したがって、フィルタ５１のリザーバ１３からの取り外しを容易としつつ不用意な外れを抑制することが可能となる。   On the other hand, in the master cylinder 11 of the first embodiment, the filter 51 has a filter large diameter portion 52 having a diameter larger than the inner diameter of the opening portion 26 of the reservoir 13 and a filter small diameter having a diameter smaller than the inner diameter of the opening portion 26. And a locking portion 55 that is smaller in diameter than the filter large-diameter portion 52 and larger in diameter than the filter small-diameter portion 54 and is locked to the reservoir 13 to restrict movement from the opening 26. For this reason, when the operator intentionally removes the filter 51 from the opening 26 of the reservoir 13, it can be removed by disposing and pulling out the engaging portion 55 within the inner cylindrical portion 45. Further, when the filter 51 is likely to be inadvertently removed from the opening 26 of the reservoir 13, the locking portion 55 is usually displaced in the radial direction with respect to the inner cylindrical portion 45. The part 55 is locked to the reservoir 13 and the movement from the opening 26 is restricted, and the removal is restricted. Therefore, it is possible to prevent inadvertent detachment while facilitating removal of the filter 51 from the reservoir 13.

また、フィルタ５１をリザーバ１３に凹凸嵌合により固定する構造ではないため、フィルタ５１およびリザーバ１３に凹凸嵌合のための凹部および凸部を形成する必要がなくなる。よって、フィルタ５１およびリザーバ１３の成形時に樹脂の流れに対しアンダカットとなる凹凸嵌合のための凹部および凸部を設ける必要がなくなり、簡素な金型構造にできる。よって、金型コストを低減することができる。   In addition, since the filter 51 is not fixed to the reservoir 13 by concave and convex fitting, it is not necessary to form concave and convex portions for concave and convex fitting in the filter 51 and the reservoir 13. Therefore, it is not necessary to provide concave and convex portions for concave / convex fitting that undercut the resin flow when the filter 51 and the reservoir 13 are molded, and a simple mold structure can be obtained. Therefore, the mold cost can be reduced.

［第２実施形態］
次に、第２実施形態を主に図５，図６に基づいて第１実施形態との相違部分を中心に説明する。なお、第１実施形態と共通する部位については、同一称呼、同一の符号で表す。 [Second Embodiment]
Next, the second embodiment will be described mainly based on FIGS. 5 and 6 with a focus on differences from the first embodiment. In addition, about the site | part which is common in 1st Embodiment, it represents with the same name and the same code | symbol.

第２実施形態では、図５（ａ）に示すように、リザーバ本体２１の開口部２６の先端側円筒状部４３に、フィルタ大径部５２を当接させることでフィルタ５１を先端側円筒状部４３に同軸に配置する外側位置決め部８１が設けられており、リザーバ本体２１の貯留部２５の内側円筒状部４５に、係止部５５を当接させることでフィルタ５１を内側円筒状部４５に同軸に配置する内側位置決め部８２が設けられている。これら外側位置決め部８１および内側位置決め部８２は、根元側円筒状部４１および内側円筒状部４５の周方向における位相を合わせている。   In the second embodiment, as shown in FIG. 5 (a), the filter 51 is made cylindrical by bringing the large-diameter portion 52 into contact with the distal cylindrical portion 43 of the opening 26 of the reservoir body 21. An outer positioning portion 81 disposed coaxially with the portion 43 is provided, and the filter 51 is placed on the inner cylindrical portion 45 by bringing the locking portion 55 into contact with the inner cylindrical portion 45 of the storage portion 25 of the reservoir body 21. An inner positioning portion 82 is provided coaxially. The outer positioning portion 81 and the inner positioning portion 82 are in phase with each other in the circumferential direction of the base cylindrical portion 41 and the inner cylindrical portion 45.

外側位置決め部８１は、図５（ｂ）に示すように、先端側円筒状部４３の内周面から径方向内側に突出する二カ所の隣り合う外側当接部８５，８６を有している。外側当接部８５，８６はいずれも突出側の先端面が平面状であり、これら先端面が鈍角をなして交差している。外側当接部８５，８６は、開口部２６の中心線からの距離が、この中心線の方向の位置が合う他の領域である先端側円筒状部４３よりも小さい領域となっている。言い換えれば、開口部２６は、開口部２６の中心線からの距離が、この中心線の方向の位置が合う他の領域である先端側円筒状部４３よりも小さい領域である外側位置決め部８１を有している。外側位置決め部８１の外側当接部８５，８６は、開口部２６の中心線からの距離が、フィルタ大径部５２の半径と同等になっている。外側当接部８５は、根元側円筒状部４１の周方向における上端位置に配置されており、外側当接部８６は、根元側円筒状部４１の周方向における上部の一側（開口部２６の開口側から見て右側）となる位置に配置されている。   As shown in FIG. 5B, the outer positioning portion 81 has two adjacent outer contact portions 85 and 86 that protrude radially inward from the inner peripheral surface of the distal end side cylindrical portion 43. . The outer abutting portions 85 and 86 each have a flat tip surface on the protruding side, and these tip surfaces intersect at an obtuse angle. The outer abutting portions 85 and 86 are regions where the distance from the center line of the opening 26 is smaller than the tip-side cylindrical portion 43 which is another region where the positions in the direction of the center line match. In other words, the opening 26 has the outer positioning portion 81 that is a region where the distance from the center line of the opening 26 is smaller than the tip-side cylindrical portion 43 that is another region in which the position in the direction of the center line matches. Have. The outer abutting portions 85 and 86 of the outer positioning portion 81 have the same distance from the center line of the opening 26 as the radius of the filter large-diameter portion 52. The outer abutting portion 85 is disposed at the upper end position in the circumferential direction of the root-side cylindrical portion 41, and the outer abutting portion 86 is one side (opening portion 26) in the circumferential direction of the root-side cylindrical portion 41. The right side when viewed from the opening side.

内側位置決め部８２は、内側円筒状部４５の周方向の一部を根元側円筒状部４１とは反対方向に延長した円筒の一部形状をなしている。内側位置決め部８２は、開口部２６の中心線からの距離が、この中心線の方向の位置が合う他の領域である内側位置決め部８２がない領域よりも小さい領域となっている。言い換えれば、貯留部２５は、開口部２６の中心線からの距離が、この中心線の方向の位置が合う他の領域よりも小さい領域である内側位置決め部８２を有する。内側位置決め部８２は、内側円筒状部４５の周方向における上端位置から上部の一側（開口部２６の開口側から見て右側）の位置にかけて形成されている。   The inner positioning portion 82 has a partial cylindrical shape in which a part of the inner cylindrical portion 45 in the circumferential direction is extended in a direction opposite to the root-side cylindrical portion 41. The inner positioning portion 82 is a region where the distance from the center line of the opening 26 is smaller than a region where there is no inner positioning portion 82 which is another region where the positions in the direction of the center line match. In other words, the storage unit 25 includes the inner positioning portion 82 that is a region where the distance from the center line of the opening 26 is smaller than other regions where the positions in the direction of the center line match. The inner positioning portion 82 is formed from the upper end position in the circumferential direction of the inner cylindrical portion 45 to a position on the upper side (right side as viewed from the opening side of the opening portion 26).

外側位置決め部８１の外側当接部８５，８６の両方にフィルタ大径部５２を当接させ、内側位置決め部８２に係止部５５を当接させた状態で、フィルタ５１は、根元側円筒状部４１および内側円筒状部４５に同軸となる。   In a state where the filter large-diameter portion 52 is brought into contact with both the outer contact portions 85 and 86 of the outer positioning portion 81 and the locking portion 55 is brought into contact with the inner positioning portion 82, the filter 51 has a base cylindrical shape. It is coaxial with the part 41 and the inner cylindrical part 45.

第２実施形態においても、作業者は、ガンノズル７１をフィルタ５１に挿入し作動液の充填を行った後、ガンノズル７１を引き抜くことになるが、その際に、例えばガンノズル７１を開口部２６の中心線に対し斜め方向に引き抜こうとすると、ガンノズル７１に引っかかってフィルタ５１がガンノズル７１とともに引き抜き方向に移動しようとすることがある。引き抜き時のガンノズル７１の姿勢はほぼ一定しないことから、例えば図６に示すようにフィルタ５１がガンノズル７１とともに径方向にずれる。すると、係止部５５が内側円筒状部４５の径方向内側の範囲から外にずれて、フィルタ５１の係止部５５が内側円筒状部４５の内端部６８に係止されて引き抜き、すなわち開口部２６からの移動を規制する状態となる。したがって、フィルタ５１が、作業者により引き抜かれるガンノズル７１とともに引き抜き方向に移動しようとしても、係止部５５が内側円筒状部４５に当接して移動が規制され、よってガンノズル７１から離れてリザーバ本体２１内に留まる。   Also in the second embodiment, after inserting the gun nozzle 71 into the filter 51 and filling the working fluid, the operator pulls out the gun nozzle 71. At this time, for example, the gun nozzle 71 is moved to the center of the opening 26. If an attempt is made to pull the line obliquely with respect to the line, the filter 51 may be caught by the gun nozzle 71 and move together with the gun nozzle 71 in the pulling direction. Since the posture of the gun nozzle 71 at the time of pulling out is not substantially constant, the filter 51 is shifted in the radial direction together with the gun nozzle 71 as shown in FIG. Then, the locking portion 55 is shifted out of the radially inner range of the inner cylindrical portion 45, and the locking portion 55 of the filter 51 is locked to the inner end portion 68 of the inner cylindrical portion 45 and is pulled out. The movement from the opening 26 is restricted. Therefore, even if the filter 51 tries to move in the pulling direction together with the gun nozzle 71 pulled out by the operator, the movement of the locking portion 55 abuts on the inner cylindrical portion 45 and is restricted from moving. Stay inside.

また、フィルタ５１をリザーバ本体２１から取り外す場合、作業者は、キャップ２２を開口部２６から取り外し、フィルタ５１を、開口部２６の開口側から見て右上方向に押し、図５（ｂ）に示すように、外側位置決め部８１の外側当接部８５，８６の両方にフィルタ大径部５２を当接させ、内側位置決め部８２に係止部５５を当接させた状態で引いて、係止部５５を内側円筒状部４５内に入り込ませる。すると、その間は、外側位置決め部８１および内側位置決め部８２の案内で、フィルタ５１が開口部２６に同軸状に配置された状態を維持しながら移動する。その後は、係止部５５が内側円筒状部４５および根元側円筒状部４１で案内されることになる。よって、フィルタ５１をリザーバ本体２１から円滑に取り外すことができる。   When removing the filter 51 from the reservoir body 21, the operator removes the cap 22 from the opening 26, pushes the filter 51 in the upper right direction when viewed from the opening side of the opening 26, and is shown in FIG. As described above, the filter large-diameter portion 52 is brought into contact with both of the outer contact portions 85 and 86 of the outer positioning portion 81, and is pulled in a state in which the locking portion 55 is brought into contact with the inner positioning portion 82. 55 is inserted into the inner cylindrical portion 45. Then, during that time, the filter 51 moves while maintaining the state in which the filter 51 is coaxially disposed in the opening 26 by the guidance of the outer positioning portion 81 and the inner positioning portion 82. Thereafter, the locking portion 55 is guided by the inner cylindrical portion 45 and the root cylindrical portion 41. Therefore, the filter 51 can be smoothly removed from the reservoir body 21.

第２実施形態によれば、貯留部２５は、開口部２６の中心線からの距離が、この中心線の方向の位置が合う他の領域よりも小さい領域である内側位置決め部８２を有するため、これに係止部５５を当接させてフィルタ５１を軸方向に移動させれば、係止部５５を内側円筒状部４５内に容易に入り込ませることができる。したがって、フィルタ５１のリザーバ１３からの不用意な外れを抑制しつつ、取り外しをさらに容易にすることができる。   According to the second embodiment, the storage portion 25 has the inner positioning portion 82 that is a region where the distance from the center line of the opening 26 is smaller than other regions in which the positions in the direction of the center line match. If the locking part 55 is brought into contact with this and the filter 51 is moved in the axial direction, the locking part 55 can easily enter the inner cylindrical part 45. Therefore, it is possible to further facilitate the removal while suppressing inadvertent removal of the filter 51 from the reservoir 13.

また、開口部２６は、開口部２６の中心線からの距離が、この中心線の方向の位置が合う他の領域である先端側円筒状部４３よりも小さい領域である外側位置決め部８１を有するため、内側位置決め部８２に係止部５５を当接させるとともに、外側位置決め部８１にフィルタ大径部５２を当接させてフィルタ５１を軸方向に移動させれば、フィルタ５１を開口部２６および内側円筒状部４５と同軸に配置した状態で移動させることができる。よって、係止部５５を内側円筒状部４５内に一層容易に入り込ませることができる。   Moreover, the opening part 26 has the outer positioning part 81 which is an area | region where the distance from the centerline of the opening part 26 is an area | region smaller than the front end side cylindrical part 43 which is another area | region where the position of this centerline direction suits. Therefore, when the locking portion 55 is brought into contact with the inner positioning portion 82 and the filter large diameter portion 52 is brought into contact with the outer positioning portion 81 to move the filter 51 in the axial direction, the filter 51 is moved to the opening 26 and The inner cylindrical portion 45 can be moved in a coaxial arrangement. Therefore, the locking portion 55 can be more easily inserted into the inner cylindrical portion 45.

なお、係止部５５の内側円筒状部４５内への入り込みを案内するためには、外側位置決め部８１および内側位置決め部８２のうち、係止部５５に近い側の内側位置決め部８２のみを設けても良い。   In order to guide the engagement of the locking portion 55 into the inner cylindrical portion 45, only the inner positioning portion 82 on the side closer to the locking portion 55 of the outer positioning portion 81 and the inner positioning portion 82 is provided. May be.

また、係止部５５は、フィルタ５１の全周にわたって連続して形成されていなくても良く、周方向に断続的に形成されていても良い。   Moreover, the latching | locking part 55 does not need to be formed continuously over the perimeter of the filter 51, and may be intermittently formed in the circumferential direction.

以上の実施形態の第１の態様は、開口部から注入される作動液を貯留するリザーバと、前記開口部に設けられるフィルタと、前記リザーバから作動液の供給を受けるマスタシリンダ本体と、を有するマスタシリンダであって、前記フィルタは、前記開口部の内径よりも大径のフィルタ大径部と、前記開口部の内径よりも小径のフィルタ小径部と、前記フィルタ大径部より小径であり、前記フィルタ小径部より大径に形成され、前記開口部からの移動を規制する係止部と、を有する。これにより、フィルタのリザーバからの取り外しを容易としつつ不用意な外れを抑制することが可能となる。   The first aspect of the above embodiment includes a reservoir that stores hydraulic fluid injected from the opening, a filter that is provided in the opening, and a master cylinder body that receives supply of hydraulic fluid from the reservoir. A master cylinder, wherein the filter has a filter large-diameter portion larger than the inner diameter of the opening, a filter small-diameter portion smaller than the inner diameter of the opening, and a smaller diameter than the filter large-diameter portion; And a locking portion that is formed to have a larger diameter than the small-diameter portion of the filter and restricts movement from the opening. As a result, it is possible to easily prevent the filter from being removed from the reservoir while suppressing inadvertent removal.

第２の態様は、上記第１の態様において、前記リザーバは、前記開口部と、該開口部から注入される作動液を貯留する貯留部と、を有し、前記貯留部は、前記開口部の中心線からの距離が、前記中心線の方向の位置が合う他の領域よりも小さい領域を有する。これにより、フィルタのリザーバからの取り外しがさらに容易となる。   According to a second aspect, in the first aspect, the reservoir includes the opening, and a reservoir that stores hydraulic fluid injected from the opening, and the reservoir is the opening. The distance from the center line is smaller than other areas where the positions in the direction of the center line match. This further facilitates removal of the filter from the reservoir.

１１ マスタシリンダ
１２ マスタシリンダ本体
１３ リザーバ
２５ 貯留部
２６ 開口部
５１ フィルタ
５２ フィルタ大径部
５４ フィルタ小径部
５５ 係止部
８２ 内側位置決め部 DESCRIPTION OF SYMBOLS 11 Master cylinder 12 Master cylinder main body 13 Reservoir 25 Storage part 26 Opening part 51 Filter 52 Filter large diameter part 54 Filter small diameter part 55 Locking part 82 Inner positioning part

Claims (2)

開口部から注入される作動液を貯留するリザーバと、
前記開口部に設けられるフィルタと、
前記リザーバから作動液の供給を受けるマスタシリンダ本体と、
を有するマスタシリンダであって、
前記フィルタは、
前記開口部の内径よりも大径のフィルタ大径部と、
前記開口部の内径よりも小径のフィルタ小径部と、
前記フィルタ大径部より小径であり、前記フィルタ小径部より大径に形成され、前記開口部からの移動を規制する係止部と、を有することを特徴とするマスタシリンダ。 A reservoir for storing hydraulic fluid injected from the opening;
A filter provided in the opening;
A master cylinder body that receives a supply of hydraulic fluid from the reservoir;
A master cylinder having
The filter is
A filter large-diameter portion having a diameter larger than the inner diameter of the opening,
A filter small-diameter portion having a smaller diameter than the inner diameter of the opening,
A master cylinder having a locking portion that is smaller in diameter than the filter large-diameter portion, larger in diameter than the filter small-diameter portion, and that restricts movement from the opening. 前記リザーバは、前記開口部と、該開口部から注入される作動液を貯留する貯留部と、を有し、
前記貯留部は、前記開口部の中心線からの距離が、前記中心線の方向の位置が合う他の領域よりも小さい領域を有することを特徴とする請求項１記載のマスタシリンダ。 The reservoir includes the opening, and a reservoir that stores hydraulic fluid injected from the opening.
2. The master cylinder according to claim 1, wherein the storage portion has a region in which a distance from a center line of the opening is smaller than another region in which positions in the direction of the center line are matched.
JP2018099864A 2018-05-24 2018-05-24 Master cylinder Pending JP2019202677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018099864A JP2019202677A (en) 2018-05-24 2018-05-24 Master cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018099864A JP2019202677A (en) 2018-05-24 2018-05-24 Master cylinder

Publications (1)

Publication Number Publication Date
JP2019202677A true JP2019202677A (en) 2019-11-28

Family

ID=68725999

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018099864A Pending JP2019202677A (en) 2018-05-24 2018-05-24 Master cylinder

Country Status (1)

Country Link
JP (1) JP2019202677A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103262U (en) * 1980-12-17 1982-06-25
JPH0343071U (en) * 1989-09-05 1991-04-23
JPH0486571U (en) * 1990-12-04 1992-07-28
JPH0562701U (en) * 1992-02-03 1993-08-20 トキコ株式会社 Hydraulic fluid reservoir
JPH0986389A (en) * 1995-07-20 1997-03-31 Tokico Ltd Reservoir
JPH1162544A (en) * 1997-08-27 1999-03-05 Toyota Motor Corp Oil fiber system for valve opening/closing characteristic controller
JP2001055131A (en) * 1999-08-11 2001-02-27 Bosch Braking Systems Co Ltd Hydraulic fluid reservoir
US20140196453A1 (en) * 2013-01-15 2014-07-17 Mando Corporation Reservoir tank of brake master cylinder

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103262U (en) * 1980-12-17 1982-06-25
JPH0343071U (en) * 1989-09-05 1991-04-23
JPH0486571U (en) * 1990-12-04 1992-07-28
JPH0562701U (en) * 1992-02-03 1993-08-20 トキコ株式会社 Hydraulic fluid reservoir
JPH0986389A (en) * 1995-07-20 1997-03-31 Tokico Ltd Reservoir
JPH1162544A (en) * 1997-08-27 1999-03-05 Toyota Motor Corp Oil fiber system for valve opening/closing characteristic controller
JP2001055131A (en) * 1999-08-11 2001-02-27 Bosch Braking Systems Co Ltd Hydraulic fluid reservoir
US20140196453A1 (en) * 2013-01-15 2014-07-17 Mando Corporation Reservoir tank of brake master cylinder

Similar Documents

Publication Publication Date Title
US6596240B2 (en) Pipette tip for easy mounting and ejecting from a pipette
JP4717996B2 (en) Container and plug used therefor
KR101260115B1 (en) Socket for pipe coupling and pipe coupling
US6955077B2 (en) Pipette tip with an internal sleeve and method for forming same
RU2425750C1 (en) Procedure for fabrication of reservoir of thermo-plastic by extrusion-blowing moulding and connecting element implemented at this procedure
AU2006258376A1 (en) Pipe coupling
JP2013048683A (en) Cosmetic material container and method of manufacturing the same
JP2019202677A (en) Master cylinder
TW200300354A (en) Injection needle retractable injector
KR100582791B1 (en) Writing implement
US20110028939A1 (en) Tip end assembly
JP5363939B2 (en) Ballpoint pen and ballpoint pen tip manufacturing method
KR20090007102A (en) Reservoir of oil for automobile
JPH10274373A (en) Pipe joint
JP5601654B2 (en) Trigger type liquid ejector
JP5397852B2 (en) Shoe injection adapter
JP2007296428A (en) Liquid jetting unit
JP4610436B2 (en) Water filling method for training water fire extinguisher and training fire extinguisher
JP2007237755A (en) Tank injection port structure
JP2008162408A (en) Fuel inlet
JP2010149915A (en) Cap loss-preventing implement
JP7406066B2 (en) Method for forming outside air introduction holes in the container body of a laminated container
JP2008162070A (en) Sealing pump-up device
JP2022024561A (en) Cutting tool
KR20150138629A (en) Reservoir tank

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20201209

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20210916

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20211005

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20220405