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公开(公告)号：US20190063562A1
公开(公告)日：2019-02-28
申请号：US16044728
申请日：2018-07-25
发明人： Masanori Watanabe , Yudai Takagi , Osamu Yoshida , Yuji Kurematsu
IPC分类号： F16H7/08
摘要： To provide a tensioner capable of keeping, with a simple structure, oil pressure in an oil pressure chamber stable. The tensioner includes a pressure adjusting mechanism that adjusts oil pressure in the oil pressure chamber. The pressure adjusting mechanism includes a cylinder part, a piston unit set inside the cylinder part so as to be able to approach and separate from the oil pressure chamber, and piston biasing units that bias the piston unit toward the oil pressure chamber. A liquid tight seal condition is kept between the cylinder part and the piston unit at any position between a position where the piston unit has moved closest to the oil pressure chamber and a position where the piston unit has moved closest to the adjustment space. The piston biasing units include at least two piston springs.
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公开(公告)号：US09958040B2
公开(公告)日：2018-05-01
申请号：US14931207
申请日：2015-11-03
发明人： Yasuyuki Takagi , Osamu Yoshida , Munehiro Maeda , Yuji Kurematsu
IPC分类号： F16H7/08
CPC分类号： F16H7/08 , F16H7/0836 , F16H2007/0806 , F16H2007/0872 , F16H2007/0893
摘要： An object of the present invention is to provide a tensioner and a rocking lever that have simple configurations and that enable an increase in the volume of a space provided inside a plunger, the tensioner and the rocking lever being capable of preventing a stopper pin from being damaged or falling out. A plunger pin hole 121 is formed in a plunger 120 of a tensioner 100. In a tensioner body 110, a body pin hole 113 is formed in a tip protruding portion 112 provided so as to protrude from a side of an opening of the plunger housing hole 121. One of lips 154 provided on opposite sides, in a width direction, of the pressing surface 153 of a rocking lever 150 so as to protrude from the pressing surface 153, has a thinned portion 155 thinned in the width direction.
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公开(公告)号：US20180087628A1
公开(公告)日：2018-03-29
申请号：US15708672
申请日：2017-09-19
发明人： Munehiro Maeda , Yuji Kurematsu , Osamu Yoshida , Yudai Takagi
IPC分类号： F16H7/08
摘要： Provided is a tensioner which can ensure, with a simple structure, both the stability of the installation state of a check valve and the capacity of an oil storage chamber. A tensioner has a plunger, a housing, a check valve, and a coil spring. The plunger has a front-side plunger part having a pressing front end portion, and a rear-side plunger part disposed on the rear side of the front-side plunger part and having a valve movement restricting portion. The check valve is disposed on the rear side of the valve movement restricting portion. The coil spring is disposed so that one end thereof is in contact with a housing bottom portion and the other end thereof is in contact with the rear side of the check valve.
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公开(公告)号：US09689474B2
公开(公告)日：2017-06-27
申请号：US14718837
申请日：2015-05-21
发明人： Nobuyuki Onoda , Osamu Yoshida , Yuji Kurematsu
CPC分类号： F16H7/08 , F16H7/0836 , F16H7/0848 , F16H2007/0806 , F16H2007/0812
摘要： Provided is a chain tensioner that is capable of restricting the movement of a plunger at an engagement position, hardly causes its breakage and abrasion even if receiving a great force applied to the plunger, needs no setting for a backlash amount, and allows the engagement position of the plunger to be freely shifted forward and backward. The tensioner body has an engagement member that extends toward and retracts from engagement grooves provided on the outer periphery of the plunger, a press member that presses, in one direction, a cam member which maintains and releases the extending state of the engagement member, and a hydraulic supply path through which oil is supplied to press the cam member in a direction opposite to the pressing direction of the press member.
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公开(公告)号：US20160123435A1
公开(公告)日：2016-05-05
申请号：US14922784
申请日：2015-10-26
发明人： Osamu Yoshida , Munehiro Maeda , Yuji Kurematsu
IPC分类号： F16H7/08
CPC分类号： F16H7/08 , F16H2007/0812
摘要： To provide a tensioner which can circulate a sufficient amount of oil even if there is a long time lag until pressurized oil starts to be supplied, and which exhibits a lower level of leak of oil stored therein, and which is structured simply without increasing the number of components therefore. The tensioner includes: a tensioner body having a plunger bore; a cylindrical plunger slidably inserted into the plunger bore; and biasing means for urging the plunger outward. When the tensioner is fixed to a wall surface, a body hole that extends from the wall surface up to a circumferential surface of the plunger bore is located lower than an oil discharge hole in the wall surface.
摘要翻译： 即使在加压油开始供给之间存在长时间滞后并且存在较低的油泄漏水平的情况下，也能够提供能够循环足够量的油的张紧器，并且简单地构成，而不增加数量 因此。 张紧器包括：具有柱塞孔的张紧器本体; 可滑动地插入到柱塞孔中的圆柱形柱塞; 以及用于将柱塞向外推动的偏压装置。 当张紧器固定在壁面上时，从壁面延伸到柱塞孔的圆周表面的主体孔位于比壁表面中的排油孔更低的位置。
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公开(公告)号：US20150267789A1
公开(公告)日：2015-09-24
申请号：US14643091
申请日：2015-03-10
发明人： Yuji Kurematsu , Osamu Yoshida
IPC分类号： F16H7/08
CPC分类号： F16H7/08 , F16H7/0836 , F16H2007/0806 , F16H2007/0812 , F16H2007/0859 , F16H2007/0893
摘要： Provided is a chain tensioner that can improve the degree of freedom in setting the oil supply position with a simple structure, can supply sufficient and necessary oil when restarted after a long time after the stop of oil supply, can entirely be made shorter and smaller, and can be produced easily with reduced cost. In a chain tensioner 100 in which a plunger 120 inserted in a plunger bore 111 of a tensioner body 110 is biased outward by biasing means 140 provided in an oil pressure chamber 101 to be extendable and contractible, an oil reservoir chamber 123 is formed on an outer side than a check valve 150 inside a plunger body 126, and a connection/adjustment groove 103 forming an oil supply space 102 is formed in an inner circumferential surface of the plunger bore 111.
摘要翻译： 提供一种链条张紧器，其能够以简单的结构提高设定供油位置的自由度，能够在油供给停止后长时间重新起动时供给足够的必要的油，能够全部变短， 并且可以以降低的成本容易地生产。 在链条张紧器100中，插入在张紧器主体110的柱塞孔111中的柱塞120通过设置在油压室101中的偏压装置140向外偏压以可伸缩，在储油室123形成 在柱塞体126内的止回阀150的外侧，形成有供油空间102的连接/调节槽103形成在活塞孔111的内周面上。
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公开(公告)号：US09115788B2
公开(公告)日：2015-08-25
申请号：US13855249
申请日：2013-04-02
发明人： Yuji Kurematsu , Osamu Yoshida
IPC分类号： F16H7/08
CPC分类号： F16H7/08 , F16H2007/0853 , F16H2007/0859 , F16H2007/088
摘要： In a ring-type tensioner, a resilient ring that cooperates with external grooves formed on a plunger to restrict retracting movement of the plunger in a tensioner housing, is formed with manipulation parts that extend through a cut-out portion in the housing and have bulged portions that are spaced by gaps from opposed walls of the cut-out portions. A rod-shaped tool inserted into one of the gaps cooperates with the bulged portion and the wall on opposite sides of the gap to expand the ring. The manipulation parts can be formed with tool-holding portions.
摘要翻译： 在环形张紧器中，与形成在柱塞上的外部槽配合以限制柱塞在张紧器壳体中的回缩运动的弹性环形成有延伸穿过壳体中的切口部分并且具有膨胀的操纵部件 与切口部分的相对壁间隔开的部分。 插入一个间隙中的棒状工具与间隙的相对侧上的凸出部分和壁配合，以使环膨胀。 操作部件可以由工具保持部形成。
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公开(公告)号：US20130324337A1
公开(公告)日：2013-12-05
申请号：US13898976
申请日：2013-05-21
发明人： Osamu Yoshida , Yuji Kurematsu
IPC分类号： F16H7/08
CPC分类号： F16H7/08 , F16H7/0836 , F16H2007/0853 , F16H2007/0859
摘要： In a hydraulic tensioner for maintaining tension in a traveling transmission medium in an engine, oil is delivered to an expansible chamber formed by a tensioner housing and a plunger through a reserve chamber composed of an entrance reserve chamber into which oil flows from an oil supply and a supply reserve chamber from which oil flows to the expansible chamber. A partition between the entrance and supply reserve chambers establishes a communication passage that ensures an amount of oil in the supply reserve chamber sufficient to make up the loss of oil due to leakage from the expansible chamber during a long interval while engine is inoperative, and additional leakage from the expansible chamber due to reciprocating movement of the plunger when the engine is started.
摘要翻译： 在用于维持发动机行驶的传动介质中的张力的液压张紧器中，油被输送到由张紧器壳体和柱塞形成的可膨胀室，该可膨胀室通过由从油源流动的入口储备室组成的储备室， 供应储备室，油从其流到可膨胀室。 入口和供应储备室之间的隔板建立连通通道，确保供应储备室中的油量足以弥补由于在发动机不起作用的长时间间隔期间由于可膨胀室的泄漏而导致的油的损失，并且附加 当发动机起动时，由于柱塞的往复运动，从可膨胀室泄漏。
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公开(公告)号：US11448292B2
公开(公告)日：2022-09-20
申请号：US16877769
申请日：2020-05-19
IPC分类号： F16H7/08
摘要： To provide a tensioner that can keep the oil pressure in an oil pressure chamber stable and consistently generate suitable reaction force and damping force to impact loads to reduce looseness in the chain and noise. A piston is set such as to partition an inner space of a plunger into an adjustment space on the front side and the oil pressure chamber on the rear side, a piston restricting member restricting the movement of the piston toward the adjustment space. An oil relief mechanism is configured to cause the piston to move forward when oil pressure in the oil pressure chamber rises so as to discharge oil inside the oil pressure chamber to the outside. The piston restricting member has an orifice function that can control the amount of discharged oil.
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公开(公告)号：US11156272B2
公开(公告)日：2021-10-26
申请号：US16263696
申请日：2019-01-31
发明人： Masanori Watanabe , Osamu Yoshida
IPC分类号： F16H7/08
摘要： The present invention provides a chain tensioner that automatically adjusts flow path resistance inside an oil leak path with a simple configuration to make it possible to reduce a change in damping characteristics resulting from a change in oil temperature and reduce an increase in manufacturing cost. In the chain tensioner, a pressure oil chamber is provided with an oil leak path communicating with an outside of the chain tensioner, the oil leak path contains a movable piece which is movable with a temperature-dependent deformation member that deforms according to oil temperature, and the movable piece is formed into a shape that changes flow path resistance of the oil leak path according to a position to which the movable piece is moved.
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