公开(公告)号：US08419575B2

公开(公告)日：2013-04-16

申请号：US13081124

申请日：2011-04-06

申请人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

发明人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

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

摘要： A tensioner for a chain or similar power transmission medium comprises a spring-biased plunger having annular rack teeth with gradually sloping forward surfaces and steeper rearward surfaces. The teeth are engaged by radially movable balls received in inclined grooves in an axially movable annular ball seat disposed in an annular groove formed in the wall of a plunger-accommodating hole in a tensioner housing. The bottoms of the inclined grooves face a steep rearward surface of a rack tooth, and the annular ball seat is axially movable in the annular groove and biased in the plunger protruding direction by a spring that exerts a biasing force greater than the biasing force exerted on the plunger. The balls and the movable annular ball seat block retraction of the plunger on engine start-up, but permit retraction when excessive force is imparted to the plunger while the plunger is in a protruding condition.

摘要翻译： 用于链式或类似动力传递介质的张紧器包括具有环形齿条齿的弹簧偏置柱塞，其具有逐渐倾斜的前表面和更陡的后表面。 这些齿通过容纳在设置在形成在张紧器壳体中的柱塞容纳孔的壁中的环形槽中的可轴向移动的环形球座中的倾斜槽中接收。 倾斜槽的底部面向齿条齿的陡峭的后表面，并且环形球座可在环形槽中轴向移动，并通过弹簧施加偏压力，该弹簧施加在柱塞突出方向上，该弹簧施加大于施加在 柱塞。 球和可动环形球座座在发动机启动时柱塞缩回，但是当柱塞处于突出状态时，当柱塞施加过大的力时允许回缩。

公开(公告)号：US20110287880A1

公开(公告)日：2011-11-24

申请号：US13097468

申请日：2011-04-29

申请人： Atsushi Hayami ,  Osamu Yoshida ,  Yuji Kurematsu

发明人： Atsushi Hayami ,  Osamu Yoshida ,  Yuji Kurematsu

IPC分类号： F16H7/08

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

摘要： In a tensioner having a ratchet mechanism composed of annular teeth on a plunger and an expansible resilient ring disposed in a groove formed in the inner peripheral surface of a plunger-accommodating hole in a tensioner housing, the rear surfaces of the annular teeth have a steep slope, and the front surfaces of the annular teeth have a gradual slope with a convex curvature such that the rate of change of the slope decreases proceeding in the direction of retraction of the plunger.

摘要翻译： 在具有由柱塞上的环形齿构成的棘轮机构的张紧器和设置在形成在张紧器壳体中的柱塞容纳孔的内周面的槽中的可膨胀弹性环的情况下，环形齿的后表面具有陡峭 斜面，并且环形齿的前表面具有具有凸曲率的渐变斜率，使得斜面的变化率在柱塞的缩回方向上减小。

公开(公告)号：US08568258B2

公开(公告)日：2013-10-29

申请号：US13097468

申请日：2011-04-29

申请人： Atsushi Hayami ,  Osamu Yoshida ,  Yuji Kurematsu

发明人： Atsushi Hayami ,  Osamu Yoshida ,  Yuji Kurematsu

IPC分类号： F16H7/08

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

摘要： In a tensioner having a ratchet mechanism composed of annular teeth on a plunger and an expansible resilient ring disposed in a groove formed in the inner peripheral surface of a plunger-accommodating hole in a tensioner housing, the rear surfaces of the annular teeth have a steep slope, and the front surfaces of the annular teeth have a gradual slope with a convex curvature such that the rate of change of the slope decreases proceeding in the direction of retraction of the plunger.

摘要翻译： 在具有由柱塞上的环形齿构成的棘轮机构的张紧器和设置在形成在张紧器壳体中的柱塞容纳孔的内周面的槽中的可膨胀弹性环的情况下，环形齿的后表面具有陡峭 斜面，并且环形齿的前表面具有具有凸曲率的渐变斜率，使得斜面的变化率在柱塞的缩回方向上减小。

公开(公告)号：US20110269584A1

公开(公告)日：2011-11-03

申请号：US13081124

申请日：2011-04-06

申请人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

发明人： Osamu Yoshida ,  Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

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

摘要： A tensioner for a chain or similar power transmission medium comprises a spring-biased plunger having annular rack teeth with gradually sloping forward surfaces and steeper rearward surfaces. The teeth are engaged by radially movable balls received in inclined grooves in an axially movable annular ball seat disposed in an annular groove formed in the wall of a plunger-accommodating hole in a tensioner housing. The bottoms of the inclined grooves face a steep rearward surface of a rack tooth, and the annular ball seat is axially movable in the annular groove and biased in the plunger protruding direction by a spring that exerts a biasing force greater than the biasing force exerted on the plunger. The balls and the movable annular ball seat block retraction of the plunger on engine start-up, but permit retraction when excessive force is imparted to the plunger while the plunger is in a protruding condition.

摘要翻译： 用于链式或类似动力传递介质的张紧器包括具有环形齿条齿的弹簧偏置柱塞，其具有逐渐倾斜的前表面和更陡的后表面。 这些齿通过容纳在设置在形成在张紧器壳体中的柱塞容纳孔的壁中的环形槽中的可轴向移动的环形球座中的倾斜槽中接收。 倾斜槽的底部面向齿条齿的陡峭的后表面，并且环形球座可在环形槽中轴向移动，并通过弹簧施加偏压力，该弹簧施加在柱塞突出方向上，该弹簧施加大于施加在 柱塞。 球和可动环形球座座在发动机启动时柱塞缩回，但是当柱塞处于突出状态时，当柱塞施加过大的力时允许回缩。

公开(公告)号：US20110021298A1

公开(公告)日：2011-01-27

申请号：US12829706

申请日：2010-07-02

申请人： Yuji Kurematsu ,  Atsushi Hayami

发明人： Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0891

摘要： In a chain tensioner, an expansible ring is disposed in an internal groove formed in the inner wall of a plunger-accommodating hole near an open end thereof. The ring cooperates with grooves formed on the plunger to exert a ratchet action. The relationship between the angles of the surfaces of the internal groove and the grooves on the plunger allows the plunger to protrude, restricts retraction of the plunger on start-up of a chain transmission, but allows retraction when chain tension becomes excessive. In one embodiment, in which the ring is a C-ring, the tensioner housing can be formed with external threads for mounting in a threaded hole on a timing chain cover or other engine part. In other embodiments, the ring can have externally protruding levers for manipulation of the ring.

摘要翻译： 在链条张紧器中，可膨胀的环设置在形成在其开口端附近的柱塞容纳孔的内壁中的内槽中。 环与形成在柱塞上的凹槽配合以施加棘轮动作。 内槽的表面和柱塞上的槽之间的关系允许柱塞突出，限制链条传动装置启动时柱塞的缩回，但当链张力过大时允许缩回。 在其中环是C形环的一个实施例中，张紧器壳体可以形成有外螺纹，用于安装在正时链盖或其它发动机部件上的螺纹孔中。 在其他实施例中，环可以具有用于操纵环的外部突出的杠杆。

公开(公告)号：US08282520B2

公开(公告)日：2012-10-09

申请号：US12829706

申请日：2010-07-02

申请人： Yuji Kurematsu ,  Atsushi Hayami

发明人： Yuji Kurematsu ,  Atsushi Hayami

IPC分类号： F16H7/08 ,  F16H7/22

CPC分类号： F16H7/0836 ,  F16H7/0848 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0891

摘要： In a chain tensioner, an expansible ring is disposed in an internal groove formed in the inner wall of a plunger-accommodating hole near an open end thereof. The ring cooperates with grooves formed on the plunger to exert a ratchet action. The relationship between the angles of the surfaces of the internal groove and the grooves on the plunger allows the plunger to protrude, restricts retraction of the plunger on start-up of a chain transmission, but allows retraction when chain tension becomes excessive. In one embodiment, in which the ring is a C-ring, the tensioner housing can be formed with external threads for mounting in a threaded hole on a timing chain cover or other engine part. In other embodiments, the ring can have externally protruding levers for manipulation of the ring.

摘要翻译： 在链条张紧器中，可膨胀的环设置在形成在其开口端附近的柱塞容纳孔的内壁中的内槽中。 环与形成在柱塞上的凹槽配合以施加棘轮动作。 内槽的表面和柱塞上的槽之间的关系允许柱塞突出，限制链条传动装置启动时柱塞的缩回，但当链张力过大时允许缩回。 在其中环是C形环的一个实施例中，张紧器壳体可以形成有外螺纹，用于安装在正时链盖或其它发动机部件上的螺纹孔中。 在其他实施例中，环可以具有用于操纵环的外部突出的杠杆。

公开(公告)号：US20110300977A1

公开(公告)日：2011-12-08

申请号：US13116202

申请日：2011-05-26

申请人： Atsushi Hayami ,  Kaori Mori ,  Masahiko Konno ,  Yuji Kurematsu

发明人： Atsushi Hayami ,  Kaori Mori ,  Masahiko Konno ,  Yuji Kurematsu

IPC分类号： F16H55/14

CPC分类号： F16H55/30 ,  F16H2055/306

摘要： In a sprocket comprising a sprocket hub, sprocket teeth and a cushion plate for contacting link plates of a transmission chain, the cushion plate is formed with concave portions at angular positions corresponding to the angular positions of the tips of the sprocket teeth, thereby avoiding contact, or reducing contact pressure, between the cushion plate and the middle parts of link plates of the chain.

摘要翻译： 在包括链轮毂，链轮齿和用于接触传动链的链板的缓冲板的链轮中，缓冲板在对应于链轮齿的尖端的角位置的角位置处形成有凹部，从而避免接触 或降低接触压力，在缓冲板和链条的链板的中间部分之间。

公开(公告)号：US09062741B2

公开(公告)日：2015-06-23

申请号：US13409592

申请日：2012-03-01

申请人： Yuji Kurematsu ,  Kaori Mori ,  Munehiro Maeda ,  Osamu Yoshida

发明人： Yuji Kurematsu ,  Kaori Mori ,  Munehiro Maeda ,  Osamu Yoshida

IPC分类号： F16H7/08

CPC分类号： F16H7/0848 ,  F16H7/08 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0859

摘要： A ratchet-type tensioner, comprising: a housing; a plunger supported by the housing for movement in opposite advancing and setback directions, the plunger having rack teeth provided thereon, and being arranged to advance with respect to the housing along the advancing direction for applying tension to a traveling transmission medium engaged with rotating members; and a ratchet mechanism capable of restricting the plunger from setting back due to a reaction force acting in a setback direction from the transmission medium; said ratchet mechanism comprising: a ratchet-receiving hole provided within the housing; a ratchet element slidable in the ratchet-receiving hole and movable in a sliding direction transverse to the advancing and setback directions; ratchet teeth on the ratchet element engageable with the rack teeth of the plunger; and a ratchet-biasing means for biasing the ratchet element in an engaging direction along the sliding direction so that the ratchet teeth engage with the rack teeth; said ratchet mechanism being capable of restricting the plunger from being set back by a reaction force acting in a setback direction from the transmission medium; said rack teeth having a concave-convex form and being composed of stop surfaces facing in the setback direction and sliding surfaces facing in the advance direction, said sliding surfaces being inclined relative to the sliding direction and facing in a disengaging direction opposite from the engaging direction; each of said sliding surfaces having an entry starting location which the ratchet teeth first engage when starting to enter the rack teeth, and an entry ending location where the engagement of the ratchet teeth with the rack teeth ends; each said sliding surface being a curved surface, all of said curved surface, between said entry starting location and said entry ending location of said sliding surface, bulging in the advancing direction of the plunger and in the disengaging direction of the ratchet element from an imaginary reference plane intersecting said entry starting location and said entry ending location of said sliding surface and perpendicular to another imaginary plane to which the advancing and setback direction of the plunger and the sliding direction of the ratchet element are parallel; and at least a part of said curve midway along said curve between the entry starting location and the entry ending location is convex.

公开(公告)号：US20120309570A1

公开(公告)日：2012-12-06

申请号：US13477345

申请日：2012-05-22

申请人： Yuji Kurematsu ,  Osamu Yoshida ,  Munehiro Maeda ,  Akira Ishii

发明人： Yuji Kurematsu ,  Osamu Yoshida ,  Munehiro Maeda ,  Akira Ishii

IPC分类号： F16H7/08

CPC分类号： F16H7/0848 ,  F16H2007/0806 ,  F16H2007/0855 ,  F16H2007/0859 ,  F16H2007/0893

摘要： In a ring-type tensioner, an expansible elastic ring disposed in a groove formed in the wall of a plunger-accommodating hole cooperates with teeth formed on the plunger to restrict axial movement of the plunger. The ring and the groove in the wall of the plunger-accommodating hole have flat radial surfaces for mutual engagement. However the ring also has oblique plunger-tooth engaging surfaces. The ring has manipulable end parts that can be locked in fixed relation to each other by a tool to secure the plunger against axial movement. The tool can also be inserted into a gap between the manipulable end parts to expand the ring and thereby release the plunger.

摘要翻译： 在环形张紧器中，设置在形成在柱塞容纳孔的壁中的槽中的可膨胀弹性环与形成在柱塞上的齿配合以限制柱塞的轴向运动。 柱塞容纳孔的壁中的环和槽具有相互接合的平坦的径向表面。 然而，该环也具有倾斜的柱塞 - 齿啮合表面。 环具有可操纵的端部，其可以通过工具彼此固定地相互锁定，以将柱塞固定在轴向运动上。 工具也可以插入到可操纵的端部之间的间隙中以使环膨胀，从而释放柱塞。

公开(公告)号：US20120244975A1

公开(公告)日：2012-09-27

申请号：US13409592

申请日：2012-03-01

申请人： Yuji Kurematsu ,  Kaori Mori ,  Munehiro Maeda ,  Osamu Yoshida

发明人： Yuji Kurematsu ,  Kaori Mori ,  Munehiro Maeda ,  Osamu Yoshida

IPC分类号： F16H7/08

CPC分类号： F16H7/0848 ,  F16H7/08 ,  F16H2007/0806 ,  F16H2007/0812 ,  F16H2007/0853 ,  F16H2007/0859

摘要： A ratchet mechanism of the ratchet tensioner comprises a toothed ratchet element slidable in a housing and movable in a sliding direction, a plunger movable in an advance/setback direction and having rack teeth engageable by the teeth of the ratchet element, and a ratchet-biasing spring for biasing the ratchet element so that its teeth engage the rack teeth. The rack teeth have stop surfaces facing in the setback direction and sliding surfaces facing the advancing direction. The sliding surfaces are curved surfaces bulging in the advancing direction and in the direction of disengagement of the ratchet element from the rack teeth, the bulge being in an area extending from an entry starting location to an entry ending location.

摘要翻译： 棘轮张紧器的棘轮机构包括可在壳体中滑动并可在滑动方向上移动的齿形棘轮元件，柱塞可在提前/倒退方向上移动并且具有可由棘轮元件的齿啮合的齿条齿轮和棘轮偏置 弹簧用于偏压棘轮元件，使其齿接合齿条齿。 齿条齿具有面向倒退方向的止动表面和面向前进方向的滑动表面。 滑动表面是在前进方向和棘齿元件与齿条齿分离的方向上凸出的弯曲表面，凸起位于从进入开始位置延伸到入口终点位置的区域中。