JP2022062869A - Cylinder device - Google Patents

Cylinder device Download PDF

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JP2022062869A
JP2022062869A JP2020171041A JP2020171041A JP2022062869A JP 2022062869 A JP2022062869 A JP 2022062869A JP 2020171041 A JP2020171041 A JP 2020171041A JP 2020171041 A JP2020171041 A JP 2020171041A JP 2022062869 A JP2022062869 A JP 2022062869A
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piston rod
cylinder
peripheral surface
inner peripheral
ring member
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JP7446200B2 (en
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潤 中田
Jun Nakada
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Hitachi Astemo Ltd
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Hitachi Astemo Ltd
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  • Fluid-Damping Devices (AREA)

Abstract

To provide a cylinder device capable of reducing costs.SOLUTION: A cylinder device has a ring member 25 installed to a piston rod 22, and an annular cap member 26 that engages with the ring member 25 with the piston rod 22 inserted, and to which a counterpart member 27 is attached. The cap member 26 is formed with an attaching portion 91 that abuts on the counterpart member, and a bending portion 92 that is provided at an inner peripheral end and is bent to a cylinder side. An opposite portion 141 with the piston rod 22 of the bending portion 92 is provided with a press-in portion 122 pressed in the piston rod 22, and a ring member abutting portion 123 that is formed on the cylinder side than the press-in portion 122, and abuts on the ring member 25.SELECTED DRAWING: Figure 3

Description

本発明は、シリンダ装置に関する。 The present invention relates to a cylinder device.

ヘッドキャップをピストンロッドの鍔部に溶接等によって固定するものがある（例えば、特許文献１参照）。 Some head caps are fixed to the flange of the piston rod by welding or the like (see, for example, Patent Document 1).

特開２００７－２４７８４２号公報JP-A-2007-247842

シリンダ装置においてコストを低減することが要望されている。 There is a demand for cost reduction in cylinder devices.

したがって、本発明は、コストを低減することができるシリンダ装置の提供を目的とする。 Therefore, an object of the present invention is to provide a cylinder device capable of reducing costs.

上記目的を達成するために、本発明は、シリンダと、前記シリンダから外部に延出されるピストンロッドと、前記ピストンロッドに装着されるリング部材と、前記ピストンロッドが挿通されて前記リング部材に係合すると共に、相手部材が取り付けられる環状のキャップ部材と、を有し、前記キャップ部材は、前記相手部材と当接する取付部と、内周端に設けられて前記シリンダ側に折り曲げられる折曲部とが形成され、前記折曲部の前記ピストンロッドとの対向部には、前記ピストンロッドに圧入される圧入部と、該圧入部よりも前記シリンダ側に形成され、前記リング部材に当接するリング部材当接部と、
を有する、構成とした。 In order to achieve the above object, the present invention relates to a cylinder, a piston rod extending outward from the cylinder, a ring member mounted on the piston rod, and the piston rod being inserted into the ring member. It has an annular cap member to which the mating member is attached, and the cap member has a mounting portion that comes into contact with the mating member and a bent portion that is provided at the inner peripheral end and is bent toward the cylinder side. And are formed, and on the portion of the bent portion facing the piston rod, a press-fitting portion to be press-fitted into the piston rod and a ring formed on the cylinder side of the press-fitting portion and in contact with the ring member. With the member contact part,
It was made into a structure having.

本発明によれば、コストを低減することができる。 According to the present invention, the cost can be reduced.

本発明に係る実施形態のシリンダ装置を示す一部を断面とした正面図である。It is a front view which made a part of the cylinder apparatus of embodiment which concerns on this invention a cross section. 本発明に係る実施形態のシリンダ装置の要部の断面図である。It is sectional drawing of the main part of the cylinder apparatus of embodiment which concerns on this invention. 本発明に係る実施形態のシリンダ装置の要部の拡大断面図である。It is an enlarged sectional view of the main part of the cylinder apparatus of embodiment which concerns on this invention. 本発明に係る実施形態のシリンダ装置の変形例の要部の断面図である。It is sectional drawing of the main part of the modification of the cylinder apparatus of embodiment which concerns on this invention. 本発明に係る実施形態のシリンダ装置のキャップ部材の変形例の要部の拡大断面図である。It is an enlarged sectional view of the main part of the modification of the cap member of the cylinder device of the embodiment which concerns on this invention.

本発明に係る実施形態のシリンダ装置を図面を参照して以下に説明する。 The cylinder device of the embodiment according to the present invention will be described below with reference to the drawings.

実施形態のシリンダ装置１１は、自動車や鉄道車両等の車両のサスペンション装置に用いられる緩衝器であり、具体的には自動車のサスペンション装置に用いられる緩衝器である。シリンダ装置１１は、略円筒状のシリンダ２１と、一端側がシリンダ２１内に挿入されると共にシリンダ２１の軸方向の一端側から外部に延出されるピストンロッド２２とを有している。また、シリンダ装置１１は、シリンダ２１のピストンロッド２２が突出する側とは反対側に固定された取付アイ２３を有している。 The cylinder device 11 of the embodiment is a shock absorber used in a suspension device of a vehicle such as an automobile or a railroad vehicle, and specifically, is a shock absorber used in a suspension device of an automobile. The cylinder device 11 has a substantially cylindrical cylinder 21 and a piston rod 22 having one end side inserted into the cylinder 21 and extending outward from one end side in the axial direction of the cylinder 21. Further, the cylinder device 11 has a mounting eye 23 fixed to the side opposite to the side on which the piston rod 22 of the cylinder 21 protrudes.

シリンダ装置１１は、ピストンロッド２２のシリンダ２１内に配置される側の端部に取り付けられてシリンダ２１内を二室に区画する図示略のピストンを有しており、ピストンロッド２２およびピストンがシリンダ２１に対し軸方向に移動し、その際に減衰力を発生させる。 The cylinder device 11 has a piston (not shown) attached to an end of the piston rod 22 on the side arranged in the cylinder 21 to divide the inside of the cylinder 21 into two chambers, and the piston rod 22 and the piston are cylinders. It moves in the axial direction with respect to 21 and generates a damping force at that time.

シリンダ装置１１は、いずれもピストンロッド２２を内側に挿通させて軸方向のシリンダ２１側から順に設けられる、リング部材２５、キャップ部材２６、ワシャ２７（相手部材）、クッション受部材２８、クッション２９、クッション受部材３０、ブラケット３１、板状部材３２、クッション受部材３３、クッション３４、クッション受部材３５およびナット３６を有している。また、シリンダ装置１１は、キャップ部材２６に取り付けられるカバー３８（相手部材）を有している。リング部材２５、キャップ部材２６、ワシャ２７、クッション受部材２８，３０，３３，３５、ブラケット３１、板状部材３２、ナット３６およびカバー３８は、金属製であり、クッション２９，３４はゴム製である。 The cylinder device 11 is provided with a ring member 25, a cap member 26, a washer 27 (counterpart member), a cushion receiving member 28, and a cushion 29, all of which are provided in order from the cylinder 21 side in the axial direction by inserting the piston rod 22 inward. It has a cushion receiving member 30, a bracket 31, a plate-shaped member 32, a cushion receiving member 33, a cushion 34, a cushion receiving member 35, and a nut 36. Further, the cylinder device 11 has a cover 38 (counterpart member) attached to the cap member 26. The ring member 25, the cap member 26, the washer 27, the cushion receiving members 28, 30, 33, 35, the bracket 31, the plate-shaped member 32, the nut 36 and the cover 38 are made of metal, and the cushions 29 and 34 are made of rubber. be.

ピストンロッド２２は、金属製であり、シリンダ２１から突出する部分に、主軸部５１とネジ軸部５２とを有している。ネジ軸部５２は、主軸部５１に対し軸方向のシリンダ２１とは反対側に設けられている。ピストンロッド２２は、少なくともシリンダ２１から突出する部分全体が継ぎ目のない一部品からなっている。 The piston rod 22 is made of metal and has a main shaft portion 51 and a screw shaft portion 52 in a portion protruding from the cylinder 21. The screw shaft portion 52 is provided on the side opposite to the cylinder 21 in the axial direction with respect to the main shaft portion 51. At least the entire portion of the piston rod 22 protruding from the cylinder 21 is a seamless component.

図２に示すように、主軸部５１は、シリンダ２１側（図２の下側）から順に、大径部６１と、係合溝６２と、嵌合部６３と、テーパ部６４と、小径部６５とを有している。 As shown in FIG. 2, the spindle portion 51 has a large diameter portion 61, an engagement groove 62, a fitting portion 63, a tapered portion 64, and a small diameter portion in order from the cylinder 21 side (lower side in FIG. 2). It has 65 and.

図３に示すように、大径部６１は、その外周端にある外周面部７１が円筒面である。 As shown in FIG. 3, in the large diameter portion 61, the outer peripheral surface portion 71 at the outer peripheral end thereof is a cylindrical surface.

嵌合部６３は、その外周端にある外周面部７３が円筒面である。嵌合部６３の外径すなわち外周面部７３の径は、大径部６１の外径すなわち外周面部７１の径よりも若干小径である。 The outer peripheral surface portion 73 at the outer peripheral end of the fitting portion 63 is a cylindrical surface. The outer diameter of the fitting portion 63, that is, the diameter of the outer peripheral surface portion 73 is slightly smaller than the outer diameter of the large diameter portion 61, that is, the diameter of the outer peripheral surface portion 71.

係合溝６２は、円環状であり、外周面部７１，７３よりも径方向内方に凹んでいる。係合溝６２は、その凹状の溝内面７２が、外周面部７１の軸方向の外周面部７３側の端縁部から、外周面部７３の軸方向の外周面部７１側の端縁部まで延びている。溝内面７２は、ピストンロッド２２の中心軸線を含む面での断面が円弧状をなしている。 The engaging groove 62 has an annular shape and is recessed inward in the radial direction from the outer peripheral surface portions 71 and 73. The concave groove inner surface 72 of the engaging groove 62 extends from the end edge portion of the outer peripheral surface portion 71 on the outer peripheral surface portion 73 side in the axial direction to the end edge portion of the outer peripheral surface portion 73 on the outer peripheral surface portion 71 side in the axial direction. .. The groove inner surface 72 has an arcuate cross section on the surface including the central axis of the piston rod 22.

テーパ部６４は、その外周端にある外周面部７４がテーパ面であって、外周面部７３の軸方向における溝内面７２とは反対側の端縁部から延びている。この外周面部７４は、外周面部７３から軸方向に離れるほど外径が小径となる。 In the tapered portion 64, the outer peripheral surface portion 74 at the outer peripheral end thereof is a tapered surface, and extends from the end edge portion on the side opposite to the groove inner surface 72 in the axial direction of the outer peripheral surface portion 73. The outer diameter of the outer peripheral surface portion 74 becomes smaller as the distance from the outer peripheral surface portion 73 in the axial direction increases.

小径部６５は、その外周端にある外周面部７５が、円筒面であって、外周面部７４の軸方向における外周面部７３とは反対側の端縁部から延びている。小径部６５の外径すなわち外周面部７５の径は、嵌合部６３の外径すなわち外周面部７３の径よりも小径である。 In the small diameter portion 65, the outer peripheral surface portion 75 at the outer peripheral end thereof is a cylindrical surface and extends from the end edge portion on the side opposite to the outer peripheral surface portion 73 in the axial direction of the outer peripheral surface portion 74. The outer diameter of the small diameter portion 65, that is, the diameter of the outer peripheral surface portion 75 is smaller than the outer diameter of the fitting portion 63, that is, the diameter of the outer peripheral surface portion 73.

図１に示すように、ネジ軸部５２の外周部にはオネジ８１が形成されている。ネジ軸部５２の最大外径であるオネジ８１の最大外径は、小径部６５の外径よりも小径となっている。図３に示す外周面部７１，７３，７４，７５、溝内面７２および図１に示すオネジ８１は、共通の一本の中心軸線を中心とする同軸状に配置されている。 As shown in FIG. 1, a male screw 81 is formed on the outer peripheral portion of the screw shaft portion 52. The maximum outer diameter of the male screw 81, which is the maximum outer diameter of the screw shaft portion 52, is smaller than the outer diameter of the small diameter portion 65. The outer peripheral surface portions 71, 73, 74, 75 shown in FIG. 3, the groove inner surface 72, and the male screw 81 shown in FIG. 1 are arranged coaxially with one common central axis as the center.

リング部材２５は、周方向の一部が破断された円形状のＣリングであり、図２に示すように、その中心軸線を含む面での断面が円形状をなしている。リング部材２５は、円柱状の棒材を、両端部を対向させるように円形状に湾曲させて形成されている。リング部材２５は、拡縮径可能となっている。リング部材２５は、自然状態での最小内径が係合溝６２の最小外径に対し同等以下となっている。 The ring member 25 is a circular C-ring in which a part of the ring member 25 is broken in the circumferential direction, and as shown in FIG. 2, the cross section of the surface including the central axis thereof has a circular shape. The ring member 25 is formed by bending a columnar rod member into a circular shape so that both ends face each other. The ring member 25 can be expanded or contracted in diameter. The minimum inner diameter of the ring member 25 in a natural state is equal to or less than the minimum outer diameter of the engaging groove 62.

キャップ部材２６は、円環状であって、一枚の金属製の板状部材からプレス成形による打ち抜きおよび折り曲げによって形成されている。キャップ部材２６は、径方向中間から外周端までの円環状の取付部９１と、内周端に設けられた折曲部９２とを有している。キャップ部材２６は、継ぎ目のない一体成形品である。 The cap member 26 has an annular shape and is formed by punching and bending a single metal plate-shaped member by press molding. The cap member 26 has an annular mounting portion 91 from the radial middle to the outer peripheral end, and a bent portion 92 provided at the inner peripheral end. The cap member 26 is a seamless integrally molded product.

取付部９１は、有孔円形平板状の基板部１０１と、基板部１０１の外周縁部から基板部１０１の径方向における外方かつ軸方向における一側に延出するテーパ状のテーパ板部１０２と、テーパ板部１０２の外周縁部からテーパ板部１０２の軸方向において基板部１０１とは反対方向に延出する円筒状の取付本体部１０３とを有している。 The mounting portion 91 includes a perforated circular flat plate-shaped substrate portion 101 and a tapered tapered plate portion 102 extending outward in the radial direction and one side in the axial direction from the outer peripheral edge portion of the substrate portion 101. And a cylindrical mounting body portion 103 extending from the outer peripheral edge portion of the tapered plate portion 102 in the axial direction of the tapered plate portion 102 in the direction opposite to the substrate portion 101.

折曲部９２は、基板部１０１の内周端から基板部１０１の軸方向におけるテーパ板部１０２および取付本体部１０３の側に折り曲げられている。折曲部９２は、基板部１０１の内周端から基板部１０１の軸方向におけるテーパ板部１０２および取付本体部１０３の側に延びる筒状の軸方向延出部１１１と、軸方向延出部１１１の軸方向における基板部１０１とは反対側の部分から軸方向延出部１１１の径方向における外方に向けて延出する径方向延出部１１２とを有している。 The bent portion 92 is bent from the inner peripheral end of the substrate portion 101 toward the tapered plate portion 102 and the mounting main body portion 103 in the axial direction of the substrate portion 101. The bent portion 92 includes a tubular axial extending portion 111 extending from the inner peripheral end of the substrate portion 101 toward the tapered plate portion 102 and the mounting main body portion 103 in the axial direction of the substrate portion 101, and an axial extending portion. It has a radial extension portion 112 extending outward in the radial direction of the axial extension portion 111 from a portion of the 111 opposite to the substrate portion 101 in the axial direction.

径方向延出部１１２は有孔円形平板状であり、基板部１０１に対向する対向面１１５が、基板部１０１の径方向延出部１１２に対向する対向面１１６に面接触で隙間なく当接している。径方向延出部１１２の外径はワシャ２７の外径と同等である。径方向延出部１１２の対向面１１５と、径方向延出部１１２の対向面１１５とは反対側に向く端面１１７と、基板部１０１の対向面１１６と、基板部１０１の対向面１１６とは反対側に向く端面１１８とは、キャップ部材２６の中心軸線に対して垂直に広がる平面状をなしている。 The radial extension portion 112 has a perforated circular flat plate shape, and the facing surface 115 facing the substrate portion 101 abuts on the facing surface 116 facing the radial extending portion 112 of the substrate portion 101 without a gap by surface contact. ing. The outer diameter of the radial extending portion 112 is the same as the outer diameter of the washer 27. The facing surface 115 of the radial extending portion 112, the end surface 117 facing the opposite side of the facing surface 115 of the radial extending portion 112, the facing surface 116 of the substrate portion 101, and the facing surface 116 of the substrate portion 101 The end surface 118 facing the opposite side has a planar shape extending perpendicular to the central axis of the cap member 26.

図３に示すように、軸方向延出部１１１の径方向内側は、軸方向の径方向延出部１１２とは反対側から順に、一端Ｒ面取部１２１と、圧入部１２２と、段部１２３（リング部材当接部）と、中間Ｒ面取部１２４と、大径部１２５と、他端面取部１２６と、を有している。 As shown in FIG. 3, the inside of the axial extension portion 111 in the radial direction is, in order from the side opposite to the axial extension portion 112, one end R chamfered portion 121, a press-fitting portion 122, and a stepped portion. It has 123 (ring member contact portion), an intermediate R chamfered portion 124, a large diameter portion 125, and a other end chamfered portion 126.

一端Ｒ面取部１２１は、その内周端の内周面部１３１が、基板部１０１の端面１１８の内周端縁部から軸方向の圧入部１２２側に延出している。内周面部１３１は、軸方向において圧入部１２２側ほど小径となり且つ湾曲の中心が軸方向延出部１１１の内部に配置される湾曲面となっている。 One end of the R chamfered portion 121, the inner peripheral surface portion 131 of the inner peripheral end thereof extends from the inner peripheral end edge portion of the end surface 118 of the substrate portion 101 toward the press-fitting portion 122 in the axial direction. The inner peripheral surface portion 131 has a smaller diameter toward the press-fitting portion 122 in the axial direction, and the center of the curvature is a curved surface arranged inside the axial extending portion 111.

圧入部１２２は、その内周端の内周面部１３２が、内周面部１３１の最小内径の端縁部から軸方向に延出しており、一定径の円筒面となっている。キャップ部材２６は、ピストンロッド２２に取り付けられる前の状態で、圧入部１２２の内径すなわち内周面部１３２の径が、ピストンロッド２２の嵌合部６３の外径すなわち外周面部７３の径よりも締め代分小径となっている。この状態の圧入部１２２の内径すなわち内周面部１３２の径は、ピストンロッド２２の小径部６５の外径すなわち外周面部７５の径よりも大径である。ワシャ２７の内径も、ピストンロッド２２の嵌合部６３の外径すなわち外周面部７３の径よりも締め代分小径となっている。 The press-fitting portion 122 has an inner peripheral surface portion 132 at the inner peripheral end thereof extending in the axial direction from the edge portion having the minimum inner diameter of the inner peripheral surface portion 131, and has a cylindrical surface having a constant diameter. In the state before the cap member 26 is attached to the piston rod 22, the inner diameter of the press-fitting portion 122, that is, the diameter of the inner peripheral surface portion 132 is tightened more than the outer diameter of the fitting portion 63 of the piston rod 22, that is, the diameter of the outer peripheral surface portion 73. It has a small diameter. The inner diameter of the press-fitting portion 122 in this state, that is, the diameter of the inner peripheral surface portion 132 is larger than the outer diameter of the small diameter portion 65 of the piston rod 22, that is, the diameter of the outer peripheral surface portion 75. The inner diameter of the washer 27 is also smaller than the outer diameter of the fitting portion 63 of the piston rod 22, that is, the diameter of the outer peripheral surface portion 73.

段部１２３は、内周面部１３２の軸方向における内周面部１３１とは反対側の端縁部から径方向外方に広がる段面部１３３を有している。段面部１３３は軸方向において内周面部１３１，１３２とは反対側に向いており、キャップ部材２６の中心軸線に対して垂直に広がる平面状をなしている。 The step portion 123 has a step portion 133 extending radially outward from an edge portion on the opposite side of the inner peripheral surface portion 131 in the axial direction of the inner peripheral surface portion 132. The stepped surface portion 133 faces in the axial direction opposite to the inner peripheral surface portions 131 and 132, and has a planar shape extending perpendicular to the central axis of the cap member 26.

中間Ｒ面取部１２４は、その内周端の内周面部１３４が、段面部１３３の外周端縁部から径方向外方かつ軸方向の内周面部１３１，１３２とは反対側に広がっている。内周面部１３４は、軸方向において内周面部１３１，１３２とは反対側ほど大径となり且つ湾曲の中心が軸方向延出部１１１の外部に配置される湾曲面となっている。 In the intermediate R chamfered portion 124, the inner peripheral surface portion 134 of the inner peripheral end thereof extends radially outward from the outer peripheral edge portion of the stepped surface portion 133 and opposite to the inner peripheral surface portions 131 and 132 in the axial direction. .. The inner peripheral surface portion 134 has a larger diameter toward the side opposite to the inner peripheral surface portions 131 and 132 in the axial direction, and the center of the curve is a curved surface arranged outside the axially extending portion 111.

大径部１２５は、その内周端の内周面部１３５が、内周面部１３４の最大内径の端縁部から軸方向に内周面部１３２とは反対方向に延出しており、一定径の円筒面となっている。大径部１２５の内径すなわち内周面部１３５の径は、圧入部１２２の内径すなわち内周面部１３２の径よりも大径となっている。大径部１２５の内径すなわち内周面部１３５の径は、リング部材２５の外径よりも大径となっている。 In the large-diameter portion 125, the inner peripheral surface portion 135 of the inner peripheral end extends axially from the edge portion of the maximum inner diameter of the inner peripheral surface portion 134 in the direction opposite to the inner peripheral surface portion 132, and is a cylinder having a constant diameter. It is a face. The inner diameter of the large diameter portion 125, that is, the diameter of the inner peripheral surface portion 135 is larger than the inner diameter of the press-fitting portion 122, that is, the diameter of the inner peripheral surface portion 132. The inner diameter of the large diameter portion 125, that is, the diameter of the inner peripheral surface portion 135 is larger than the outer diameter of the ring member 25.

他端面取部１２６は、その内周端の内周面部１３６（ガイド面）が、内周面部１３５の軸方向の内周面部１３４とは反対側の端縁部から径方向外方かつ軸方向の内周面部１３４とは反対側に広がっている。内周面部１３６は、軸方向において内周面部１３４とは反対側ほど大径となるテーパ面となっている。内周面部１３６は、軸方向の内周面部１３５とは反対側の端縁部が径方向延出部１１２の端面１１７の内周端縁部まで延びている。内周面部１３１，１３２，１３４，１３５，１３６および段面部１３３は、共通の一本の中心軸線を中心とした同軸状に配置されている。 In the other end chamfering portion 126, the inner peripheral surface portion 136 (guide surface) of the inner peripheral end thereof is radially outward and axially from the end edge portion on the side opposite to the axial inner peripheral surface portion 134 of the inner peripheral surface portion 135. It extends to the opposite side of the inner peripheral surface portion 134 of. The inner peripheral surface portion 136 has a tapered surface having a larger diameter toward the side opposite to the inner peripheral surface portion 134 in the axial direction. The inner peripheral surface portion 136 has an end edge portion opposite to the axial inner peripheral surface portion 135 extending to the inner peripheral end edge portion of the end surface 117 of the radial extending portion 112. The inner peripheral surface portions 131, 132, 134, 135, 136 and the stepped surface portion 133 are arranged coaxially with one common central axis as the center.

図１に示すように、キャップ部材２６には、取付部９１の取付本体部１０３の外周部に、相手部材であるカバー３８が嵌合されて固定されている。このとき、取付部９１はカバー３８と当接している。カバー３８は、キャップ部材２６に固定された状態で、テーパ板部１０２の外周縁部から軸方向の基板部１０１とは反対側に延出する状態となる。キャップ部材２６は、取付本体部１０３にカバー３８が取り付けられカバー３８と一体化された状態で、シリンダ２１から突出するピストンロッド２２に取り付けられる。 As shown in FIG. 1, a cover 38, which is a mating member, is fitted and fixed to the cap member 26 on the outer peripheral portion of the mounting main body portion 103 of the mounting portion 91. At this time, the mounting portion 91 is in contact with the cover 38. The cover 38 is fixed to the cap member 26 and extends from the outer peripheral edge portion of the tapered plate portion 102 to the side opposite to the substrate portion 101 in the axial direction. The cap member 26 is attached to the piston rod 22 protruding from the cylinder 21 in a state where the cover 38 is attached to the attachment main body 103 and integrated with the cover 38.

図２に示すように、その際に、まず、ピストンロッド２２の係合溝６２にリング部材２５が装着される。このとき、リング部材２５は、弾性変形させられることにより拡径しながら、ピストンロッド２２に軸方向におけるシリンダ２１とは反対側から嵌合され、係合溝６２の位置で縮径して係合溝６２内に入り込み、図３に示すように溝内面７２に当接する。この状態で、リング部材２５は、ピストンロッド２２の大径部６１の外周面部７１および嵌合部６３の外周面部７３よりも径方向外方に突出する。 As shown in FIG. 2, at that time, first, the ring member 25 is mounted in the engaging groove 62 of the piston rod 22. At this time, the ring member 25 is fitted to the piston rod 22 from the side opposite to the cylinder 21 in the axial direction while expanding the diameter by being elastically deformed, and the diameter is reduced and engaged at the position of the engaging groove 62. It enters the groove 62 and abuts on the groove inner surface 72 as shown in FIG. In this state, the ring member 25 projects radially outward from the outer peripheral surface portion 71 of the large diameter portion 61 of the piston rod 22 and the outer peripheral surface portion 73 of the fitting portion 63.

そして、この状態で、図１に示すようにカバー３８が予め取り付けられた状態のキャップ部材２６が、カバー３８を先頭にして、ピストンロッド２２およびシリンダ２１に、ピストンロッド２２の軸方向におけるシリンダ２１とは反対側から被せられることになり、その際に、図３に示すように軸方向延出部１１１の内側にピストンロッド２２が挿通される。また、その際に、キャップ部材２６は、段部１２３よりもシリンダ２１側（図３における下側）の他端面取部１２６の内周面部１３６が段部１２３よりも外径側に広がる形状をなしているため、ピストンロッド２２の軸方向延出部１１１の内側への挿通をガイドする。 Then, in this state, as shown in FIG. 1, the cap member 26 with the cover 38 attached in advance is attached to the piston rod 22 and the cylinder 21 with the cover 38 at the head, and the cylinder 21 in the axial direction of the piston rod 22. At that time, the piston rod 22 is inserted inside the axially extending portion 111 as shown in FIG. At that time, the cap member 26 has a shape in which the inner peripheral surface portion 136 of the other end chamfering portion 126 on the cylinder 21 side (lower side in FIG. 3) of the stepped portion 123 extends toward the outer diameter side of the stepped portion 123. Therefore, the insertion of the piston rod 22 inward of the axially extending portion 111 is guided.

その後、キャップ部材２６は、圧入部１２２が内周面部１３２において、ピストンロッド２２の嵌合部６３の外周面部７３に圧入されて締まり嵌めで嵌合される。また、その際に、軸方向延出部１１１は、段部１２３が段面部１３３においてリング部材２５に当接し係合して停止する。なお、このとき、圧入の力でリング部材２５が拡径方向に変形しようとしても、軸方向延出部１１１の大径部１２５の内周面部１３５に当接して係合溝６２からの外れが規制される。 After that, the cap member 26 is fitted by tightening the press-fitting portion 122 at the inner peripheral surface portion 132 by being press-fitted into the outer peripheral surface portion 73 of the fitting portion 63 of the piston rod 22. Further, at that time, the axial extending portion 111 is stopped by the stepped portion 123 in contact with the ring member 25 at the stepped surface portion 133 and engaged with the ring member 25. At this time, even if the ring member 25 tries to be deformed in the diameter-expanding direction due to the press-fitting force, the ring member 25 comes into contact with the inner peripheral surface portion 135 of the large-diameter portion 125 of the axially extending portion 111 and is disengaged from the engaging groove 62. Be regulated.

このようにピストンロッド２２に取り付けられた状態で、キャップ部材２６は、内周端に設けられた折曲部９２が取付部９１から軸方向のシリンダ２１側（図３における下側）に折り曲げられた状態となる。また、この状態で、キャップ部材２６は、折曲部９２のピストンロッド２２と径方向に対向する対向部１４１に、一端Ｒ面取部１２１と、ピストンロッド２２に圧入される圧入部１２２と、圧入部１２２よりも軸方向のシリンダ２１側に形成され、リング部材２５に当接する段部１２３と、中間Ｒ面取部１２４と、大径部１２５と、他端面取部１２６とを有する。また、この状態で、キャップ部材２６は、折曲部９２の軸方向のシリンダ２１側に、径方向外方に向けて延びる径方向延出部１１２が形成されている。径方向延出部１１２は、取付部９１の基板部１０１に対し当接している。キャップ部材２６は、このように、溶接ではなく圧入でピストンロッド２２に取り付けられる。キャップ部材２６は、一部品にピストンロッド２２への圧入部１２２とリング部材２５に係合する段部１２３とが設けられている。 In the state of being attached to the piston rod 22 in this way, in the cap member 26, the bent portion 92 provided at the inner peripheral end is bent from the attachment portion 91 to the cylinder 21 side (lower side in FIG. 3) in the axial direction. It will be in a state of being. Further, in this state, the cap member 26 has one end R chamfering portion 121 and a press-fitting portion 122 press-fitted into the piston rod 22 into the facing portion 141 radially facing the piston rod 22 of the bent portion 92. It has a step portion 123 formed on the cylinder 21 side in the axial direction with respect to the press-fit portion 122 and in contact with the ring member 25, an intermediate R chamfering portion 124, a large diameter portion 125, and a other end chamfering portion 126. Further, in this state, the cap member 26 is formed with a radial extending portion 112 extending outward in the radial direction on the cylinder 21 side in the axial direction of the bent portion 92. The radial extension portion 112 is in contact with the substrate portion 101 of the mounting portion 91. The cap member 26 is thus attached to the piston rod 22 by press fitting rather than welding. The cap member 26 is provided with a press-fitting portion 122 to the piston rod 22 and a step portion 123 engaging with the ring member 25 in one component.

このようにして、ピストンロッド２２にキャップ部材２６を圧入により固定した後、キャップ部材２６上に載置させるようにして、ワシャ２７を嵌合部６３に圧入し締まり嵌めで嵌合させる。すると、ワシャ２７は基板部１０１の端面１１８に当接する。なお、ワシャ２７をキャップ部材２６に重ねた状態で、これらワシャ２７およびキャップ部材２６を嵌合部６３に一度に圧入することも可能である。 In this way, after the cap member 26 is fixed to the piston rod 22 by press fitting, the washer 27 is press-fitted into the fitting portion 63 and fitted by tightening so that the cap member 26 is placed on the cap member 26. Then, the washer 27 comes into contact with the end surface 118 of the substrate portion 101. It is also possible to press the washer 27 and the cap member 26 into the fitting portion 63 at once with the washer 27 stacked on the cap member 26.

その後、ワシャ２７上に、図１に示すように、クッション受部材２８、クッション２９、クッション受部材３０、ブラケット３１、板状部材３２、クッション受部材３３、クッション３４およびクッション受部材３５を、それぞれの内側にピストンロッド２２を挿通させながら載置させ、ナット３６をピストンロッド２２のネジ軸部５２のオネジ８１に螺合させる。 After that, as shown in FIG. 1, the cushion receiving member 28, the cushion 29, the cushion receiving member 30, the bracket 31, the plate-shaped member 32, the cushion receiving member 33, the cushion 34, and the cushion receiving member 35 are placed on the washer 27, respectively. The piston rod 22 is placed inside the piston rod 22 while being inserted, and the nut 36 is screwed into the male screw 81 of the screw shaft portion 52 of the piston rod 22.

そして、ナット３６を締め付けることにより、キャップ部材２６とナット３６とで、ワシャ２７、クッション受部材２８、クッション２９、クッション受部材３０、ブラケット３１、板状部材３２、クッション受部材３３、クッション３４およびクッション受部材３５を、軸方向に挟持する。この状態で、キャップ部材２６の取付部９１には、ワシャ２７が当接し、ワシャ２７が取り付けられる。 Then, by tightening the nut 36, the washer 27, the cushion receiving member 28, the cushion 29, the cushion receiving member 30, the bracket 31, the plate-shaped member 32, the cushion receiving member 33, the cushion 34, and the cap member 26 and the nut 36 are used. The cushion receiving member 35 is sandwiched in the axial direction. In this state, the washer 27 comes into contact with the attachment portion 91 of the cap member 26, and the washer 27 is attached.

ワシャ２７、クッション受部材２８、クッション２９、クッション受部材３０、ブラケット３１、板状部材３２、クッション受部材３３、クッション３４およびクッション受部材３５は、車体マウント用の部品であり、よって、キャップ部材２６は、車体マウントの座面となる。キャップ部材２６は、ワシャ２７に当接することになって、締結軸力および減衰力をうけることになる。キャップ部材２６は、一部品で、ピストンロッド２２への取り付けとカバー３８およびワシャ２７の保持とが可能になる。 The washer 27, the cushion receiving member 28, the cushion 29, the cushion receiving member 30, the bracket 31, the plate-shaped member 32, the cushion receiving member 33, the cushion 34, and the cushion receiving member 35 are parts for mounting the vehicle body, and thus the cap member. Reference numeral 26 is a seating surface of the vehicle body mount. The cap member 26 comes into contact with the washer 27 and receives a fastening axial force and a damping force. The cap member 26 can be attached to the piston rod 22 and the cover 38 and the washer 27 can be held by one component.

上記した特許文献１には、ヘッドキャップをピストンロッドの鍔部に溶接等によって固定するシリンダ装置が開示されている。溶接はコストを増大させてしまう。また、このようなシリンダ装置では、ピストンロッドが２体で形成されて、ヘッドキャップを載置するフランジ部を有する第２ピストンロッドを第１ピストンロッドに溶接で接合するようになっているものもあり、やはり溶接によってコストを増大させてしまう。 The above-mentioned Patent Document 1 discloses a cylinder device for fixing a head cap to a flange portion of a piston rod by welding or the like. Welding increases costs. Further, in such a cylinder device, a piston rod is formed of two bodies, and a second piston rod having a flange portion on which a head cap is placed is joined to the first piston rod by welding. Yes, welding also increases the cost.

これに対して、実施形態のシリンダ装置１１は、ピストンロッド２２に装着されるリング部材２５と、ピストンロッド２２が挿通されてリング部材２５に係合すると共に、相手部材であるワシャ２７およびカバー３８が取り付けられる環状のキャップ部材２６と、を有し、キャップ部材２６は、ワシャ２７およびカバー３８と当接する取付部９１と、内周端に設けられてシリンダ２１側に折り曲げられる折曲部９２とが形成され、折曲部９２のピストンロッド２２との対向部１４１には、ピストンロッド２２に圧入される圧入部１２２と、圧入部１２２よりもシリンダ２１側に形成され、リング部材２５に当接する段部１２３とを有する。これにより、キャップ部材２６をピストンロッド２２に溶接することなく固定することができるため、コストを低減することができる。 On the other hand, in the cylinder device 11 of the embodiment, the ring member 25 mounted on the piston rod 22 and the piston rod 22 are inserted and engaged with the ring member 25, and the washer 27 and the cover 38 which are mating members are engaged. The cap member 26 has an annular cap member 26 to which the piston rod is attached, and the cap member 26 has a mounting portion 91 that abuts on the washer 27 and the cover 38, and a bent portion 92 that is provided at the inner peripheral end and is bent toward the cylinder 21. Is formed, and the press-fitting portion 122 to be press-fitted into the piston rod 22 and the press-fitting portion 122 formed on the cylinder 21 side of the press-fitting portion 122 and abutting against the ring member 25 are formed in the portion 141 of the bent portion 92 facing the piston rod 22. It has a step portion 123. As a result, the cap member 26 can be fixed to the piston rod 22 without being welded, so that the cost can be reduced.

また、キャップ部材２６は、一部品で、ピストンロッド２２への取り付けと、ワシャ２７およびカバー３８の保持とが可能になるため、部品点数を低減することができ、その点でもコストを低減することができる。 Further, since the cap member 26 can be attached to the piston rod 22 and the washer 27 and the cover 38 can be held by one component, the number of components can be reduced, and the cost can be reduced in that respect as well. Can be done.

また、折曲部９２には、径方向外方に向けて延びる径方向延出部１１２が形成されているため、取付部９１を径方向延出部１１２で補強することができる。よって、ワシャ２７を介して入力されるナット３６の軸力を良好に受けることができる。 Further, since the bent portion 92 is formed with a radial extending portion 112 extending outward in the radial direction, the mounting portion 91 can be reinforced by the radial extending portion 112. Therefore, the axial force of the nut 36 input via the washer 27 can be satisfactorily received.

また、径方向延出部１１２は、取付部９１に対し当接しているため、取付部９１を径方向延出部１１２で、より強固に補強することができる。よって、ワシャ２７を介して入力されるナット３６の軸力を一層良好に受けることができる。また、圧入時に段部１２３がリング部材２５と当接することにより外周側に変形してしまうことを抑制できる。 Further, since the radial extension portion 112 is in contact with the mounting portion 91, the mounting portion 91 can be reinforced more firmly by the radial extension portion 112. Therefore, the axial force of the nut 36 input via the washer 27 can be received more satisfactorily. Further, it is possible to prevent the step portion 123 from being deformed to the outer peripheral side due to the contact with the ring member 25 at the time of press fitting.

また、段部１２３のシリンダ２１側には、段部１２３よりも外径側に広がる内周面部１３６が形成されているため、キャップ部材２６へピストンロッド２２を挿通させる作業が容易となる。 Further, since the inner peripheral surface portion 136 extending to the outer diameter side of the step portion 123 is formed on the cylinder 21 side of the step portion 123, the work of inserting the piston rod 22 into the cap member 26 becomes easy.

また、キャップ部材２６は、一枚の板材からプレスによる打ち抜きおよび折り曲げによって形成されるため、基板部１０１の平面度を出すことができる。よって、図４に示すようにワシャ２７を廃止した構造とすることも可能である。この場合、ピストンロッド２２の嵌合部６３Ａは、キャップ部材２６のみが圧入されることになるため、軸方向長さが嵌合部６３よりも短くなる。 Further, since the cap member 26 is formed by punching and bending a single plate material by a press, the flatness of the substrate portion 101 can be obtained. Therefore, as shown in FIG. 4, it is possible to have a structure in which the washer 27 is abolished. In this case, since only the cap member 26 is press-fitted into the fitting portion 63A of the piston rod 22, the axial length is shorter than that of the fitting portion 63.

なお、他端面取部１２６の内周面部１３６をテーパ面とするのではなく、図５に示す他端面取部１２６Ａの内周面部１３６Ａ（ガイド面）のように、曲げ加工時に必然的に形成される湾曲面としても良い。すなわち他端面取部１２６ＡをＲ面取りとしても良い。この内周面部１３６Ａは、内周面部１３５の軸方向の内周面部１３４とは反対側の端縁部から径方向外方かつ軸方向の内周面部１３４とは反対側に広がっている。内周面部１３６Ａは、軸方向において内周面部１３４とは反対側ほど大径となり、しかも湾曲中心が軸方向延出部１１１内に配置される湾曲面となっている。内周面部１３６Ａも、軸方向の内周面部１３５とは反対側の端縁部が径方向延出部１１２の端面１１７の内周端縁部まで延びている。 It should be noted that the inner peripheral surface portion 136 of the other end chamfering portion 126 is not made into a tapered surface, but is inevitably formed at the time of bending like the inner peripheral surface portion 136A (guide surface) of the other end chamfering portion 126A shown in FIG. It may be a curved surface to be formed. That is, the other end chamfered portion 126A may be R chamfered. The inner peripheral surface portion 136A extends radially outward and on the side opposite to the axial inner peripheral surface portion 134 from the end edge portion on the side opposite to the axial inner peripheral surface portion 134 of the inner peripheral surface portion 135. The inner peripheral surface portion 136A has a larger diameter toward the side opposite to the inner peripheral surface portion 134 in the axial direction, and the curved center is a curved surface arranged in the axial extending portion 111. Also in the inner peripheral surface portion 136A, the end edge portion on the side opposite to the inner peripheral surface portion 135 in the axial direction extends to the inner peripheral end edge portion of the end surface 117 of the radial extending portion 112.

以上に述べた実施形態の第１の態様は、シリンダと、前記シリンダから外部に延出されるピストンロッドと、前記ピストンロッドに装着されるリング部材と、前記ピストンロッドが挿通されて前記リング部材に係合すると共に、相手部材が取り付けられる環状のキャップ部材と、を有し、前記キャップ部材は、前記相手部材と当接する取付部と、内周端に設けられて前記シリンダ側に折り曲げられる折曲部とが形成され、前記折曲部の前記ピストンロッドとの対向部には、前記ピストンロッドに圧入される圧入部と、該圧入部よりも前記シリンダ側に形成され、前記リング部材に当接するリング部材当接部と、を有する。これにより、コストを低減することができる。 In the first aspect of the embodiment described above, the cylinder, the piston rod extending to the outside from the cylinder, the ring member mounted on the piston rod, and the piston rod are inserted into the ring member. It has an annular cap member that engages and to which a mating member is attached, and the cap member has a mounting portion that abuts on the mating member and a bend that is provided at the inner peripheral end and bent toward the cylinder. A portion is formed, and a press-fit portion to be press-fitted into the piston rod and a press-fit portion formed on the cylinder side of the press-fit portion to abut on the ring member at a portion of the bent portion facing the piston rod. It has a ring member contact portion. As a result, the cost can be reduced.

実施形態の第２の態様は、上記第１の態様において、前記折曲部には、径方向外方に向けて延びる径方向延出部が形成されている。 In the second aspect of the embodiment, in the first aspect, the bent portion is formed with a radial extending portion extending outward in the radial direction.

実施形態の第３の態様は、上記第２の態様において、前記径方向延出部は、前記取付部に対し当接している。 In the third aspect of the embodiment, in the second aspect, the radial extension portion is in contact with the mounting portion.

実施形態の第４の態様は、上記第１乃至第３のいずれか一態様において、前記リング部材当接部の前記シリンダ側には、該リング部材当接部よりも外径側に広がるガイド面が形成されている。 A fourth aspect of the embodiment is, in any one of the first to third aspects, a guide surface extending to the outer diameter side of the ring member contact portion on the cylinder side of the ring member contact portion. Is formed.

１１ シリンダ装置
２１ シリンダ
２２ ピストンロッド
２５ リング部材
２７ ワシャ（相手部材）
３７ カバー（相手部材）
２６ キャップ部材
９１ 取付部
９２ 折曲部
１１２ 径方向延出部
１２２ 圧入部
１２３ 段部（リング部材当接部）
１３６，１３６Ａ 内周面部（ガイド面）
１４１ 対向部 11 Cylinder device 21 Cylinder 22 Piston rod 25 Ring member 27 Washer (counterpart member)
37 Cover (counterpart)
26 Cap member 91 Mounting part 92 Folded part 112 Radial extension part 122 Press-fitting part 123 Step part (ring member contact part)
136,136A Inner peripheral surface (guide surface)
141 Opposing part

Claims (4)

シリンダと、
前記シリンダから外部に延出されるピストンロッドと、
前記ピストンロッドに装着されるリング部材と、
前記ピストンロッドが挿通されて前記リング部材に係合すると共に、相手部材が取り付けられる環状のキャップ部材と、を有し、
前記キャップ部材は、
前記相手部材と当接する取付部と、
内周端に設けられて前記シリンダ側に折り曲げられる折曲部とが形成され、
前記折曲部の前記ピストンロッドとの対向部には、前記ピストンロッドに圧入される圧入部と、該圧入部よりも前記シリンダ側に形成され、前記リング部材に当接するリング部材当接部と、
を有するシリンダ装置。 Cylinder and
A piston rod extending outward from the cylinder,
The ring member mounted on the piston rod and
It has an annular cap member through which the piston rod is inserted and engaged with the ring member, and to which a mating member is attached.
The cap member is
A mounting portion that comes into contact with the mating member,
A bent portion provided at the inner peripheral end and bent toward the cylinder is formed.
The bent portion facing the piston rod includes a press-fitting portion to be press-fitted into the piston rod and a ring member contacting portion formed on the cylinder side of the press-fitting portion and in contact with the ring member. ,
Cylinder device with. 請求項１に記載のシリンダ装置であり、
前記折曲部には、径方向外方に向けて延びる径方向延出部が形成されているシリンダ装置。 The cylinder device according to claim 1.
A cylinder device in which a radial extension portion extending outward in the radial direction is formed in the bent portion. 請求項２に記載のシリンダ装置であり、
前記径方向延出部は、前記取付部に対し当接しているシリンダ装置。 The cylinder device according to claim 2.
The radial extension portion is a cylinder device that is in contact with the mounting portion. 請求項１乃至３のいずれか一項に記載のシリンダ装置であり、
前記リング部材当接部の前記シリンダ側には、該リング部材当接部よりも外径側に広がるガイド面が形成されているシリンダ装置。 The cylinder device according to any one of claims 1 to 3.
A cylinder device in which a guide surface is formed on the cylinder side of the ring member contact portion so as to extend to the outer diameter side of the ring member contact portion.
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