公开(公告)号：US20050049093A1

公开(公告)日：2005-03-03

申请号：US10927281

申请日：2004-08-27

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： F16B33/02 ,  F16H7/08 ,  F16H7/22

CPC分类号： F16H7/0836 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0878 ,  Y10T24/45534 ,  Y10T292/1043 ,  Y10T292/1063 ,  Y10T292/444

摘要： A chain tensioner includes a housing having a cylinder chamber. A plunger is slidably mounted in the cylinder chamber. A spring is mounted in the cylinder chamber to bias the plunger outwardly of the cylinder chamber. The plunger has a radially extending locking pin at its lower portion near its front end. The housing is formed with a pin hole extending substantially perpendicular to an axis of the cylinder chamber near the front end of the housing and under the cylinder chamber. The chain tensioner further includes a support pin inserted in the pin hole, and a locking lever supported on the support pin so as to be pivotable about the support pin. The locking lever can engage the locking pin when the plunger is sufficiently pushed into the cylinder chamber, thereby keeping the plunger pushed in the cylinder chamber.

摘要翻译： 链条张紧器包括具有缸室的壳体。 柱塞可滑动地安装在气缸室中。 弹簧安装在气缸室中，以将柱塞向气缸室向外偏压。 柱塞在其前端附近的下部具有径向延伸的锁定销。 壳体形成有一个销孔，该销孔基本上垂直于该缸室的轴线延伸，靠近该壳体的前端并在缸室下方。 链条张紧器还包括插入销孔中的支撑销和支撑在支撑销上以便可绕支撑销枢转的锁定杆。 当柱塞被充分地推入气缸室中时，锁定杆能够接合锁定销，从而保持柱塞推入气缸室。

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：US07527572B2

公开(公告)日：2009-05-05

申请号：US10927281

申请日：2004-08-27

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 ,  A41F1/00 ,  E05C3/02

CPC分类号： F16H7/0836 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0878 ,  Y10T24/45534 ,  Y10T292/1043 ,  Y10T292/1063 ,  Y10T292/444

摘要： A chain tensioner includes a housing having a cylinder chamber. A plunger is slidably mounted in the cylinder chamber. A spring is mounted in the cylinder chamber to bias the plunger outwardly of the cylinder chamber. The plunger has a radially extending locking pin at its lower portion near its front end. The housing is formed with a pin hole extending substantially perpendicular to an axis of the cylinder chamber near the front end of the housing and under the cylinder chamber. The chain tensioner further includes a support pin inserted in the pin hole, and a locking lever supported on the support pin so as to be pivotable about the support pin. The locking lever can engage the locking pin when the plunger is sufficiently pushed into the cylinder chamber, thereby keeping the plunger pushed in the cylinder chamber.

摘要翻译： 链条张紧器包括具有缸室的壳体。 柱塞可滑动地安装在气缸室中。 弹簧安装在气缸室中，以将柱塞向气缸室向外偏压。 柱塞在其前端附近的下部具有径向延伸的锁定销。 壳体形成有一个销孔，该销孔基本上垂直于该缸室的轴线延伸，靠近该壳体的前端并在缸室下方。 链条张紧器还包括插入销孔中的支撑销和支撑在支撑销上以便可绕支撑销枢转的锁定杆。 当柱塞被充分地推入气缸室中时，锁定杆能够接合锁定销，从而保持柱塞推入气缸室。

公开(公告)号：US07037229B2

公开(公告)日：2006-05-02

申请号：US10693503

申请日：2003-10-27

申请人： Hisashi Hayakawa ,  Satoshi Kitano ,  Tomoyoshi Izutsu ,  Kazuo Komori

发明人： Hisashi Hayakawa ,  Satoshi Kitano ,  Tomoyoshi Izutsu ,  Kazuo Komori

IPC分类号： F16H7/08

CPC分类号： F01L1/02 ,  F01L1/022 ,  F01L1/024 ,  F01L2101/00 ,  F16H7/0836 ,  F16H2007/0806 ,  F16H2007/0859

摘要： A hydraulic tensioner includes a cylinder having a hollow space filled with hydraulic oil. A plunger is slidably mounted in the cylinder. A pushrod is mounted in the hollow space so as to be axially movable together with the plunger with one end thereof protruding from the cylinder. A spring is mounted in the cylinder to bias the plunger and pushrod outwardly of the cylinder. The plunger is formed with a passage through which a pressure chamber and reservoir chamber communicate with each other. The passage is formed with a valve seat. A check ball is arranged so as to be moved into and out of contact with the valve seat. The check ball is adapted to contact the valve seat when pressure in the pressure chamber exceeds pressure in the reservoir chamber, thereby closing the passage. The valve seat is formed of a steel for carburizing and has a surface carbon concentration of 0.55–0.75% to reduce deposition of carbides and to have a surface hardness at least equal to that of the check ball.

摘要翻译： 液压张紧器包括具有充满液压油的中空空间的气缸。 柱塞可滑动地安装在气缸中。 推杆安装在中空空间中，以便与柱塞一起轴向移动，其一端从气缸突出。 弹簧安装在气缸中以将柱塞偏压到气缸的外侧。 柱塞形成有通道，压力室和储存室通过该通道彼此连通。 通道形成有阀座。 一个止回球被布置成与阀座移动和脱离接触。 当压力室中的压力超过储存室中的压力时，止回球适于接触阀座，从而关闭通道。 阀座由用于渗碳的钢形成，并且具有0.55-0.75％的表面碳浓度以减少碳化物的沉积并且具有至少等于止回球的表面硬度。

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：US20060116229A1

公开(公告)日：2006-06-01

申请号：US11283751

申请日：2005-11-22

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 ,  F16H2007/0814 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859

摘要： A chain tensioner includes a housing formed with a cylinder chamber in which a plunger is slidably mounted. A return spring, also mounted in the cylinder chamber, biases the plunger outwardly of the cylinder chamber. The housing is formed with an oil supply passage communicating with a pressure chamber defined in the cylinder chamber by the plunger. A check valve is provided at the outlet of the oil supply passage. An oil filter is mounted in the inlet of the oil supply passage. The oil filter removes foreign objects contained in hydraulic oil supplied into the oil supply passage, thereby preventing malfunction of the chain tensioner due to foreign objects getting stuck in moving parts of the chain tensioner.

摘要翻译： 链条张紧器包括形成有气缸室的壳体，柱塞可滑动地安装在该气缸室中。 也安装在气缸室中的复位弹簧将柱塞向气缸室向外偏压。 壳体形成有通过柱塞连通于限定在气缸室中的压力室的供油通道。 在供油通道的出口处设有止回阀。 油过滤器安装在供油通道的入口处。 油过滤器去除供给到供油通道中的液压油中所含的异物，由此防止由于异物卡在链条张紧器的移动部分而导致的链条张紧器的故障。

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。

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：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。