公开(公告)号：US07775923B2

公开(公告)日：2010-08-17

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

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

摘要： A chain tensioner for use with a chain of a vehicle engine, includes a housing and a plunger slidably mounted in a 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 in the cylinder chamber to prevent backflow of hydraulic oil in the pressure chamber. A relief valve, provided in the plunger, opens above a relief pressure, thereby discharging hydraulic oil in the pressure chamber. An oil leakage clearance is defined between the plunger and the inner wall of the cylinder chamber. The relief pressure and the oil leakage clearance dimension 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 engine revolution speed.

摘要翻译： 用于与车辆发动机链条一起使用的链条张紧器包括可滑动地安装在形成于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。 在气缸室中设置止回阀，以防止压力室中的液压油回流。 设置在柱塞中的安全阀在溢流压力以上打开，从而排出压力室中的液压油。 在柱塞和气缸室的内壁之间限定了漏油间隙。 确定安全压力和漏油间隙尺寸，使得链条中的张力保持在液压油的任何温度和任何发动机转速下链条的振动最小的水平。

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：US20080280711A1

公开(公告)日：2008-11-13

申请号：US10582087

申请日：2004-12-20

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

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

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H2007/0812 ,  F16H2007/0846 ,  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. A ring fitting groove 30 is formed in the outer periphery of the plunger 13 near its rear end. An elastic ring 31 is received in the ring fitting groove 30 in a radially compressed state. An engaging groove 32 is formed in the inner periphery of the cylinder 12 near its open end. By engaging the elastic ring 31 partially in the engaging groove 32 and partially in the ring fitting groove 30, it is possible to prevent separation of the plunger 13.

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设置有与形成在柱塞13后面的气缸室中的压力室16连通的供油通道17。 在其后端附近的柱塞13的外周形成环形配合槽30。 弹性环31以径向压缩状态容纳在环形装配槽30中。 接合槽32形成在气缸12的内周的靠近其开口端。 通过将弹性环31部分地接合在接合槽32中并且部分地接合在环形装配槽30中，可以防止柱塞13的分离。

公开(公告)号：US20060094548A1

公开(公告)日：2006-05-04

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：US5632474A

公开(公告)日：1997-05-27

申请号：US539157

申请日：1995-10-04

申请人： Hisashi Hayakawa ,  Kazuki Kawashima ,  Norio Yamazaki ,  Ken Yamamoto ,  Satoshi Kitano

发明人： Hisashi Hayakawa ,  Kazuki Kawashima ,  Norio Yamazaki ,  Ken Yamamoto ,  Satoshi Kitano

IPC分类号： F16H7/08 ,  F16H7/12

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

摘要： A hydraulic autotensioner has a cylinder having a closed bottom end, a sleeve mounted in the cylinder and a plunger slidably mounted in the sleeve. The interior of the cylinder is divided into a reservoir chamber and a pressure chamber by the plunger which is formed with a passage through which the reservoir chamber and the pressure chamber communicate with each other. A check valve is provided in the passage to close the passage if the pressure of hydraulic oil in the pressure chamber increases above the pressure of hydraulic oil in the reservoir chamber. A return spring is mounted in the cylinder to bias a rod which is axially movable together with the plunger in such a direction as to protrude from an upper opening of the cylinder. The return spring is mounted in a space formed between the outer peripheral surface of the sleeve and the inner peripheral surface of the cylinder.

摘要翻译： 液压自动张紧器具有一个具有封闭的底端的圆柱体，安装在圆柱体中的套筒和可滑动地安装在套筒中的柱塞。 气缸的内部通过柱塞分成储存室和压力室，柱塞形成有通道，储存室和压力室通过该通道相互连通。 如果压力室中的液压油的压力升高到储存室中的液压油的压力，则在通道中设置止回阀以关闭通道。 回转弹簧安装在气缸中以偏压杆，该杆可以与柱塞一起沿着从气缸的上部开口突出的方向轴向移动。 复位弹簧安装在形成于套筒的外周面与气缸的内周面之间的空间中。

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：US5482262A

公开(公告)日：1996-01-09

申请号：US310994

申请日：1994-09-23

申请人： Hisashi Hayakawa ,  Kazuki Kawashima ,  Norio Yamazaki ,  Ken Yamamoto ,  Satoshi Kitano

发明人： Hisashi Hayakawa ,  Kazuki Kawashima ,  Norio Yamazaki ,  Ken Yamamoto ,  Satoshi Kitano

IPC分类号： F16H7/08 ,  F16H7/12

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

摘要： A hydraulic autotensioner has a cylinder having a closed bottom end, a sleeve mounted in the cylinder and a plunger slidably mounted in the sleeve. The interior of the cylinder is divided into a reservoir chamber and a pressure chamber by the plunger which is formed with a passage through which the reservoir chamber and the pressure chamber communicate with each other. A check valve is provided in the passage to close the passage if the pressure of hydraulic oil in the pressure chamber increases above the pressure of hydraulic oil in the reservoir chamber. A return spring is mounted in the cylinder to bias a rod which is axially movable together with the plunger in such a direction as to protrude from an upper opening of the cylinder. The return spring is mounted in a space formed between the outer peripheral surface of the sleeve and the inner peripheral surface of the cylinder.

摘要翻译： 液压自动张紧器具有一个具有封闭的底端的圆柱体，安装在圆柱体中的套筒和可滑动地安装在套筒中的柱塞。 气缸的内部通过柱塞分成储存室和压力室，柱塞形成有通道，储存室和压力室通过该通道相互连通。 如果压力室中的液压油的压力升高到储存室中的液压油的压力，则在通道中设置止回阀以关闭通道。 回转弹簧安装在气缸中以偏压杆，该杆可以与柱塞一起沿着从气缸的上部开口突出的方向轴向移动。 复位弹簧安装在形成于套筒的外周面与气缸的内周面之间的空间中。

公开(公告)号：US06935978B2

公开(公告)日：2005-08-30

申请号：US10685703

申请日：2003-10-16

申请人： Hisashi Hayakawa ,  Seiji Sato

发明人： Hisashi Hayakawa ,  Seiji Sato

IPC分类号： F16H7/08 ,  F16H7/22

CPC分类号： F16H7/0836 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0878

摘要： A chain tensioner is provided, in which the design conditions of a register ring are optimized in compliance with the required functions so as to improve the durability, the operational stability and the like of the chain tensioner. A register ring is formed of a steel material having a tensile strength of 1000 to 3500 N/mm2. At the same time, an overlapping allowance of the register ring with respect to engagement grooves of a plunger is set within the range of 30 to 50% of a wire diameter of the register ring. Furthermore, a bending stress generated in the register ring when the register ring is made to slide between the engagement grooves to increase its diameter is set within the range of 500 to 1700 N/mm2.

摘要翻译： 提供了一种链条张紧器，其中根据所需的功能优化对准环的设计条件，从而提高链条张紧器的耐用性，操作稳定性等。 记录环由拉伸强度为1000〜3500N / mm 2的钢材形成。 同时，相对于柱塞的接合槽的定位环的重叠余量设定在对准环的线径的30〜50％的范围内。 此外，当使定位环在接合槽之间滑动以增加其直径时在定位环中产生的弯曲应力设定在500至1700N / mm 2的范围内。

公开(公告)号：US09046176B2

公开(公告)日：2015-06-02

申请号：US13860583

申请日：2013-04-11

申请人： Seiji Sato ,  Hisashi Hayakawa ,  Tasuku Furukawa ,  Tadahisa Tanaka

发明人： Seiji Sato ,  Hisashi Hayakawa ,  Tasuku Furukawa ,  Tadahisa Tanaka

IPC分类号： F16H7/22 ,  F16H7/08 ,  F16J1/00 ,  F16F9/54

CPC分类号： F16J1/00 ,  F16C23/04 ,  F16F9/54 ,  F16F2230/14 ,  F16F2230/28

摘要： A hydraulic auto-tensioner includes a cylinder containing hydraulic oil, a rod inserted in the cylinder, and two coupling pieces mounted to the bottom of the cylinder and the top end of the rod, respectively. A support ring is inserted in the mounting hole of each coupling piece, and a bush is inserted in the support ring. One of the radially inner surface of the mounting hole and the radially outer surface of the support ring is a curved surface such that the support ring is alignable. Radially outwardly extending flanges are formed at one end of the support ring and at the other end of the bush such that the flanges axially face the respective end surfaces of the coupling piece with gaps left therebetween. A coupling arrangement is provided between the support ring and the bush which is adapted to engage both the support ring and the bush when the bush is inserted into the support ring, thereby axially inseparably coupling them together.

摘要翻译： 液压自动张紧器包括一个包含液压油的缸体，一个插入缸体中的杆，以及分别安装在缸体底部和杆顶部的两个联接件。 支撑环插入每个联接件的安装孔中，并且衬套插入支撑环中。 安装孔的径向内表面和支撑环的径向外表面之一是弯曲表面，使得支撑环可对准。 径向向外延伸的凸缘形成在支撑环的一端并且在衬套的另一端处，使得凸缘轴向地面对耦合件的相应端表面，并且间隙留在其间。 在支撑环和衬套之间设置有联接装置，当衬套插入到支撑环中时，该衬套适于与支撑环和衬套接合，从而将它们轴向不可分离地联接在一起。

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。