公开(公告)号：US08393987B2

公开(公告)日：2013-03-12

申请号：US12581945

申请日：2009-10-20

申请人： Seiji Sato ,  Satoshi Kitano ,  Hisashi Hayakawa ,  Tasuku Furukawa

发明人： Seiji Sato ,  Satoshi Kitano ,  Hisashi Hayakawa ,  Tasuku Furukawa

IPC分类号： F16H7/22 ,  F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0857 ,  F16H2007/0859

摘要： A chain tensioner includes a cylinder having a closed end, an internally threaded plunger axially slidable in the cylinder, a return spring biasing the plunger in the protruding direction from the cylinder, and a screw rod having an external thread in threaded engagement with the internal thread of the plunger. The portion of the screw rod protruding from the plunger abuts a rod seat provided in the cylinder. The screw rod has a rolled external thread and an intermediate portion protruding from the plunger and having an outer diameter smaller than the diameter of the root of the external thread. The screw rod has a forged contact surface, to be contacted with the rod seat, on the axial end face of the intermediate portion. The internal thread may be formed by pressing, and a pressed recess, corresponding to the internal thread, may be formed on the plunger's outer circumference.

摘要翻译： 链条张紧器包括具有封闭端的圆柱体，在所述圆柱体中可轴向滑动的内螺纹柱塞，从所述圆柱体沿突出方向偏置所述柱塞的复位弹簧，以及具有与所述内螺纹螺纹接合的外螺纹的螺杆 的柱塞。 从柱塞突出的螺杆的部分邻接设置在气缸中的杆座。 螺杆具有滚动的外螺纹和从柱塞突出并具有小于外螺纹根部直径的外径的中间部分。 螺杆在中间部分的轴向端面上具有与杆座接触的锻造接触表面。 内螺纹可以通过按压而形成，并且可以在柱塞的外周上形成对应于内螺纹的按压凹部。

公开(公告)号：US07775921B2

公开(公告)日：2010-08-17

申请号：US10494019

申请日：2002-11-01

申请人： Tomoyoshi Izutsu ,  Seiji Sato ,  Hisashi Hayakawa

发明人： Tomoyoshi Izutsu ,  Seiji Sato ,  Hisashi Hayakawa

IPC分类号： F16H7/22

CPC分类号： F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859

摘要： A plunger 4 and a spring 6 biasing the plunger 4 outwardly are mounted in a cylinder chamber 2 formed in a housing 1. The housing 1 is provided with an oil supply passage 8 communicating with a pressure chamber 7 formed in the back of the plunger 4. The housing 1 has an outer diameter that is substantially constant over the entire axial length, so that such housings can be mass-produced by pressing. It is thus possible to lower the cost of the chain tensioner.

摘要翻译： 柱塞4和弹簧6向外偏压柱塞4，安装在形成在壳体1中的气缸室2中。壳体1设置有与形成在柱塞4后部的压力室7连通的供油通道8 壳体1具有在整个轴向长度上基本上恒定的外径，从而可以通过按压大量生产这样的壳体。 因此可以降低链条张紧器的成本。

公开(公告)号：US20100087285A1

公开(公告)日：2010-04-08

申请号：US12573211

申请日：2009-10-05

申请人： Seiji SATO ,  Satoshi Kitano ,  Hisashi Hayakawa

发明人： Seiji SATO ,  Satoshi Kitano ,  Hisashi Hayakawa

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0857 ,  F16H2007/0859

摘要： A chain tensioner includes a cylinder inserted in a tensioner mounting hole of an engine cover and having a flange fixed to the outer surface of the engine cover. A plunger is axially slidably mounted in the cylinder. The cylinder is formed with an oil supply passage through which hydraulic oil is introduced into a pressure chamber defined by the cylinder and the plunger. The oil supply passage includes a first hole portion extending inwardly from a mating surface of the flange facing the engine cover, and a second hole portion extending from the outer periphery of the flange to the pressure chamber and intersecting the first hole portion. An externally threaded portion of an externally threaded member is in threaded engagement with an internal thread formed on the second hole portion, thereby closing its outer open end. The externally threaded member is fixed in position with an adhesive applied to its externally threaded portion.

摘要翻译： 链条张紧器包括插入发动机盖的张紧器安装孔中并具有固定到发动机盖的外表面的凸缘的气缸。 柱塞轴向可滑动地安装在气缸中。 气缸形成有供油通道，液压油通过该供油通道被引入到由气缸和柱塞限定的压力室中。 供油通道包括从面向发动机盖的凸缘的配合表面向内延伸的第一孔部分，以及从凸缘的外周延伸到压力室并与第一孔部分相交的第二孔部分。 外螺纹构件的外螺纹部分与形成在第二孔部分上的内螺纹螺纹接合，从而封闭其外开口端。 外螺纹构件通过施加到其外螺纹部分上的粘合剂固定就位。

公开(公告)号：US07559863B2

公开(公告)日：2009-07-14

申请号：US11892880

申请日：2007-08-28

申请人： Kouichi Onimaru ,  Seiji Sato ,  Satoshi Kitano ,  Yoshiaki Ryouno ,  Hisashi Hayakawa

发明人： Kouichi Onimaru ,  Seiji Sato ,  Satoshi Kitano ,  Yoshiaki Ryouno ,  Hisashi Hayakawa

IPC分类号： F16H7/08

CPC分类号： F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0857 ,  F16H2007/0859

摘要： A stepped set groove having shallow and deep portions is formed in the inner periphery of a cylinder chamber formed in a housing of a chain tensioner near its open end. A radially and elastically deformable set ring having circumferentially separated ends is received in the set groove in a radially compressed state. The set ring has at the respective ends thereof a pair of grip portions which are received in a cutout formed in housing at its front end. By engaging the set ring in an engaging groove formed in the outer periphery of the plunger near its front end and the shallow portion, it is possible to keep the plunger pushed into the cylinder chamber. In this state, the chain tensioner is mounted in position. One of the grip portions is brought into abutment with one of the circumferentially opposed end walls of the cutout to prevent the plunger from rotating about its axis in such a direction that the axial gap between an internal thread of the plunger and an external thread of a screw rod inserted in the plunger disappears. Thus, it is possible to keep the axial gap larger than the axial distance by which the plunger has to be moved to move the set ring from the shallow portion into the deep portion. This makes it possible to disengage the set ring from the engaging groove by pushing the plunger into the cylinder chamber.

摘要翻译： 在靠近开口端的链式张紧器的壳体中形成的气缸室的内周形成有浅部和深部的台阶形槽。 具有周向分开的端部的径向和可弹性变形的固定环以径向压缩状态容纳在所述固定槽中。 固定环在其各自的端部处具有一对把手部分，其被容纳在其前端处形成在壳体中的切口中。 通过将固定环接合在靠近其前端和浅部的柱塞的外周形成的接合槽中，可以将柱塞保持在气缸室中。 在这种状态下，链条张紧器安装就位。 把手部分中的一个与切口的周向相对的端壁中的一个相接触，以防止柱塞绕其轴线旋转，使得柱塞的内螺纹和内螺纹之间的轴向间隙 插入柱塞的螺杆消失。 因此，可以保持轴向间隙大于柱塞必须移动的轴向距离，从而将固定环从浅部移动到深部。 这使得可以通过将柱塞推入气缸室来将固定环与接合槽分离。

公开(公告)号：US20080096707A1

公开(公告)日：2008-04-24

申请号：US10581681

申请日：2004-12-20

申请人： Seiji Sato ,  Tomoyoshi Izutsu ,  Satoshi Kitano ,  Hisashi Hayakawa

发明人： Seiji Sato ,  Tomoyoshi Izutsu ,  Satoshi Kitano ,  Hisashi Hayakawa

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859

摘要： A chain tensioner is provided which can prevent separation of the plunger. In a cylinder chamber 12 of the housing 11, a plunger 13 and a spring 15 that biases the plunger 13 outwardly are mounted. The housing 11 is provided with an oil supply passage 17 communicating with a pressure chamber 16 formed in the cylinder chamber behind the plunger 13. An axially elongated guide recess 31 is formed in the outer periphery of the plunger 13. The housing 11 is provided with a stopper pin 33 near the open end of the cylinder chamber. By abutting the rear end wall 31b of the guide recess 31, the stopper pin 33 prevents separation of the plunger 13 from the housing.

摘要翻译： 提供了可以防止柱塞分离的链条张紧器。 在壳体11的气缸室12中，安装有将柱塞13向外偏压的柱塞13和弹簧15。 壳体11设置有与柱塞13后面形成在气缸室中的压力室16连通的供油通道17.在柱塞13的外周形成有轴向细长的导向凹部31.壳体11设置有 靠近气缸室的开口端的止动销33。 通过将引导凹部31的后端壁31b抵接，止动销33阻止柱塞13与壳体分离。

公开(公告)号：US20060003859A1

公开(公告)日：2006-01-05

申请号：US11167141

申请日：2005-06-28

申请人： Seiji Sato ,  Satoshi Kitano ,  Hisashi Hayakawa

发明人： Seiji Sato ,  Satoshi Kitano ,  Hisashi Hayakawa

IPC分类号： F16H7/08 ,  F16H7/22

CPC分类号： F16H7/0836 ,  F16H2007/0806 ,  F16H2007/0814 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859

摘要： A chain tensioner for use in a chain system for driving a vehicle engine, particularly a two-wheeled vehicle engine, includes a housing and a plunger slidably mounted in the cylinder chamber formed in the housing. The plunger is biased outwardly by a return spring mounted in a pressure chamber defined in the cylinder chamber by the plunger. A check valve is provided at the closed end of the cylinder chamber to prevent backflow of hydraulic oil in the pressure chamber. A relief valve is provided in the plunger. The relief valve has a relief pressure above which the relief valve opens, thereby discharging hydraulic oil in the pressure chamber. An oil leakage clearance is defined between the inner wall of the cylinder chamber and the radially outer surface of the plunger through which hydraulic oil in the pressure chamber can leak out. The relief pressure and the radial dimension of the oil leakage clearance are determined such that the tension in the chain is kept at such a level that vibrations of the chain are minimum at any temperature of hydraulic oil and at any revolving speed of the engine.

摘要翻译： 用于驱动车辆发动机，特别是两轮车辆发动机的链条系统中的链条张紧器包括可滑动地安装在形成在壳体中的气缸室中的壳体和柱塞。 柱塞通过安装在由柱塞限定在气缸室中的压力室中的复位弹簧向外偏压。 止回阀设置在气缸室的封闭端，以防止压力室中的液压油回流。 在柱塞中设置有安全阀。 安全阀具有溢流压力，溢流阀在其上方打开，从而排出压力室中的液压油。 在气缸室的内壁和柱塞的径向外表面之间限定出油泄漏间隙，压力室中的液压油可以泄漏出来。 确定油泄漏间隙的安全压力和径向尺寸，使得链条中的张力保持在液压油的任何温度和发动机的任何转速下链条的振动最小的水平。

公开(公告)号：US4940447A

公开(公告)日：1990-07-10

申请号：US351129

申请日：1989-05-12

申请人： Kazuki Kawashima ,  Makoto Yasui ,  Hisashi Hayakawa ,  Masayuki Imoto

发明人： Kazuki Kawashima ,  Makoto Yasui ,  Hisashi Hayakawa ,  Masayuki Imoto

IPC分类号： F02B67/06 ,  F16F13/00 ,  F16H7/08 ,  F16H7/12

CPC分类号： F16H7/0836 ,  F16F13/00 ,  F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0859 ,  F16H2007/0891

摘要： An autotensioner for adjusting the tension of a timing belt used with an automotive engine. It includes a cylinder case filled with a hydraulic oil, a piston partitioning the interior of the cylinder case into a pressure chamber and a reservoir chamber and a push rod having its bottom end coupled to the piston and the top end adapted to protrude from the cylinder case. A spring is provided to bias the piston and the push rod upwardly. The pressure chamber communicates with the reservoir chamber through a channel formed through the piston. A plate-shaped check valve is provided in the pressure chamber to open and close the bottom of the channel. The plate-shaped valve can respond quickly to the fluctuation of pressure in the pressure chamber because of its reduced mass. Thus, when the piston and the push rod rise biased by the spring, the valve can move quickly to such a position as to open the channel, thus allowing the hydraulic oil in the reservoir chamber to flow quickly and smoothly back into the pressure chamber. This will prevent cavitation in the pressure chamber. The responsiveness of the valve will be improved further by providing another spring for biassing the valve in such a direction as to open the channel.

摘要翻译： 用于调节与汽车发动机一起使用的同步皮带张力的自动张紧器。 它包括装有液压油的气缸壳体，将气缸壳体的内部分隔成压力室和储存室的活塞和其底端联接到活塞的推杆，并且顶端适于从气缸突出 案件。 提供弹簧以向上偏压活塞和推杆。 压力室通过穿过活塞形成的通道与贮存室连通。 在压力室中设置有一个板形止回阀，以打开和关闭通道的底部。 板状阀由于质量下降而能够快速响应压力室内的压力波动。 因此，当活塞和推杆被弹簧上升时，阀可快速移动到打开通道的位置，从而允许储存室中的液压油快速平稳地流回压力室。 这将防止压力室中的气蚀。 阀门的响应性将进一步提高，方法是提供另一个弹簧，用于沿打开通道的方向偏压阀门。

公开(公告)号：US4904230A

公开(公告)日：1990-02-27

申请号：US382938

申请日：1989-07-21

申请人： Kazuki Kawashima ,  Hisashi Hayakawa

发明人： Kazuki Kawashima ,  Hisashi Hayakawa

IPC分类号： F16H7/08 ,  F16H7/12

CPC分类号： F16H7/1236 ,  F16H2007/0806 ,  F16H2007/081 ,  F16H2007/0844 ,  F16H2007/0859 ,  F16H2007/0878 ,  F16H2007/0891

摘要： A belt autotensioner for giving a desired tension to a belt. It includes a tension pulley pressed against the belt, an eccentric shaft extending through the tension pulley to rotatably support it and formed with a hole arranged eccentrically from the axis of the tension pulley, an actuator having a cylinder and a push rod silidably mounted in the cylinder and having its one end protruding from the cylinder and butting a projection fixed to the eccentric shaft, a bolt extending through the hole in the eccentric shaft and the cylinder of the actuator to pivotally support the eccentric shaft and a spring for biasing the eccentric shaft to pivot it in such a direction as to increase the tension of the belt. The spring may be a torsion coil spring mounted around the eccentric shaft with its one end fixed to the outer periphery of the eccentric shaft and the other end fixed to the cylinder of the actuator.

摘要翻译： 一种用于给皮带提供所需张力的皮带自动张紧器。 其包括被压靠在皮带上的张力滑轮，偏心轴延伸穿过张力滑轮以可旋转地支撑并形成有从张力皮带轮的轴线偏心布置的孔;致动器，具有可滑动地安装在 气缸，其一端从气缸突出并且对接固定到偏心轴的突起，延伸穿过偏心轴中的孔和致动器的气缸的螺栓枢转地支撑偏心轴和用于偏置偏心轴的弹簧 以使其沿着增加带的张力的方向枢转。 弹簧可以是围绕偏心轴安装的扭力螺旋弹簧，其一端固定在偏心轴的外周，另一端固定在致动器的气缸上。

公开(公告)号：US20100099529A1

公开(公告)日：2010-04-22

申请号：US12581945

申请日：2009-10-20

申请人： Seiji SATO ,  Satoshi Kitano ,  Hisashi Hayakawa ,  Tasuku Furukawa

发明人： Seiji SATO ,  Satoshi Kitano ,  Hisashi Hayakawa ,  Tasuku Furukawa

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0857 ,  F16H2007/0859

摘要： A chain tensioner includes a cylinder having a closed end, a plunger axially slidably inserted in the cylinder and having an internal thread on the inner periphery thereof, a return spring biasing the plunger in the protruding direction from the cylinder, and a screw rod having an external thread that is in threaded engagement with the internal thread of the plunger. The portion of the screw rod protruding from the plunger abuts a rod seat provided in the cylinder. The external thread of the screw rod is formed by rolling. The screw rod has an intermediate portion protruding from the plunger and having an outer diameter smaller than the diameter of the root of the external thread. A contact surface contact surface of the screw rod to be brought into contact with the rod seat is formed on the axial end face of the intermediate portion by forging. The internal thread may be formed by pressing, and a pressed recess may be formed on the outer circumference of the plunger, corresponding to the internal thread.

摘要翻译： 链条张紧器包括具有闭合端的圆柱体，柱塞可轴向滑动地插入圆柱体中，并且在其内周上具有内螺纹;沿柱向突出方向偏置柱塞的复位弹簧，以及具有 与柱塞的内螺纹螺纹接合的外螺纹。 从柱塞突出的螺杆的部分邻接设置在气缸中的杆座。 螺杆的外螺纹由轧制形成。 螺杆具有从柱塞突出并具有小于外螺纹根部直径的外径的中间部分。 通过锻造在中间部的轴向端面上形成与杆座接触的螺杆的接触面接触面。 内螺纹可以通过按压形成，并且可以在对应于内螺纹的柱塞的外周上形成压制凹部。

公开(公告)号：US07677999B2

公开(公告)日：2010-03-16

申请号：US11247254

申请日：2005-10-12

申请人： Seiji Sato ,  Satoshi Kitano ,  Hisashi Hayakawa

发明人： Seiji Sato ,  Satoshi Kitano ,  Hisashi Hayakawa

IPC分类号： F16H7/08 ,  F16H7/22

CPC分类号： F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0878

摘要： A chain tensioner includes a housing defining a cylinder chamber, and a plunger having a small-diameter end and a spring both mounted in the cylinder chamber. A register ring is fitted in a ring-receiving groove formed in the inner periphery of the cylinder chamber near its open end. A plurality of annular grooves are formed in the outer periphery of the plunger so as to be axially spaced from each other at equal intervals. The register ring is adapted to be press-fitted in one of the annular grooves. With the register ring trapped between an engaging surface of a first annular groove which is one of the annular grooves located nearest to the front end of the plunger and a locking surface of the ring-receiving groove, an outer cylindrical surface of the plunger extending forwardly from the first annular groove has its front portion supported by an inner cylindrical surface of the cylinder chamber extending forwardly from the ring-receiving groove.

摘要翻译： 链条张紧器包括限定气缸室的壳体和具有安装在气缸室中的小直径端和弹簧的柱塞。 定位环安装在形成在气缸室的内周的靠近其开口端的环形容纳槽中。 在柱塞的外周形成有多个环形槽，以相等的间隔彼此轴向间隔开。 定位环适于压配合在一个环形槽中。 在第一环形槽的接合表面之间的定位环被捕获在位于最接近柱塞的前端的环形槽中的一个和接纳环的锁定表面之间的柱塞的外圆柱表面向前延伸 该第一环形槽的前部由从环形容纳槽向前延伸的气缸室的内圆柱表面支撑。