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1. 发明授权

US5630768A Tensioner with spring having nonlinear characteristics 失效
标题翻译：带弹簧的张紧器具有非线性特性
公开(公告)号：US5630768A
公开(公告)日：1997-05-20
申请号：US692646
申请日：1996-08-06
申请人： Katsuya Nakakubo , Toru Fujiwara
发明人： Katsuya Nakakubo , Toru Fujiwara
IPC分类号： F16H7/08 , F16H7/12 , F16H7/10
CPC分类号： F16H7/1281 , F16H7/1263 , F16H2007/0806 , F16H2007/081 , F16H2007/0812 , F16H2007/0844 , F16H2007/0859 , F16H2007/0878
摘要： A tensioner includes a plunger slidably inserted in a housing and biased by spring means. The spring means include sequentially operable first and second portions in which the first portion has a relatively larger pitch and large spring modulus and the second portion has a relatively small pitch and small spring modulus. When the spring means is depressed a certain degree, the coils of the second spring portion 16 will move into close contact with each other to vary the spring modulus. Thus, the amount of backward movement and jutting out speed of the plunger will be decreased, thereby a required tensile force will be given to a belt, or the like, without delay.
摘要翻译：张紧器包括可滑动地插入壳体中并通过弹簧装置偏置的柱塞。弹簧装置包括顺序可操作的第一和第二部分，其中第一部分具有相对较大的间距和大的弹簧模量，并且第二部分具有相对较小的间距和小的弹簧模量。当弹簧装置被压下一定程度时，第二弹簧部分16的线圈将彼此紧密接触以改变弹簧模量。因此，柱塞的向后运动和突出速度的量将被减小，由此将不需要延迟地对带等施加所需的拉力。

2. 发明授权

US5833220A Hydraulic tensioner 失效
标题翻译：液压张紧器
公开(公告)号：US5833220A
公开(公告)日：1998-11-10
申请号：US763527
申请日：1996-12-12
申请人： Katsuya Nakakubo , Hiroyuki Miyake , Toru Fujiwara
发明人： Katsuya Nakakubo , Hiroyuki Miyake , Toru Fujiwara
IPC分类号： F16H7/12 , F16H7/08
CPC分类号： F16H7/08 , F16H7/0848 , F16H2007/0806 , F16H2007/0812 , F16H2007/0859 , F16H2007/0891 , F16H7/0829
摘要： A hydraulic tensioner which has a small number of components and hence can be reduced in size. The hydraulic tensioner includes a plunger 3 slidably fitted in a cylinder disposed in a tensioner body, a reservoir chamber formed in the tensioner body in a lower portion of the cylinder, a check valve permitting flow of an oil in a single direction from the reservoir chamber into the cylinder which is formed as a high pressure chamber, a low pressure chamber formed in the tensioner body exteriorly of the cylinder, an oil passage connecting a bottom of the low pressure chamber to a position between the check valve and the reservoir chamber, and a spring urging the plunger upwardly, wherein the low pressure chamber contains an air layer formed above a surface of the oil held in the lower pressure chamber. The oil passages and check valve enable the oil to flow into the high pressure chamber in a short time and hence efficiently dampen vibrations of the plunger.
摘要翻译：液压张紧器，其具有少量的部件，因此可以减小尺寸。液压张紧器包括可滑动地装配在设置在张紧器主体中的气缸中的柱塞3，在气缸的下部形成在张紧器本体中的储存室，允许油从储存室沿单一方向流动的止回阀进入形成为高压室的气缸，形成在气缸外部的张紧器主体中的低压室，将低压室的底部连接到止回阀和储存室之间的位置的油路，以及向上推动柱塞的弹簧，其中低压室包含形成在保持在低压室中的油表面上方的空气层。油通道和止回阀使得油在短时间内流入高压室，因此有效地抑制柱塞的振动。

3. 发明授权

US5234383A Temperature compensated tensioner 失效
标题翻译：温度补偿张力器
公开(公告)号：US5234383A
公开(公告)日：1993-08-10
申请号：US963704
申请日：1992-10-20
申请人： Norio Harada , Nobuto Kozakura , Katsuya Nakakubo
发明人： Norio Harada , Nobuto Kozakura , Katsuya Nakakubo
IPC分类号： F16H7/08 , F16H7/12
CPC分类号： F16H7/1236 , F16H2007/0806 , F16H2007/0859 , F16H2007/0878 , F16H2007/0891
摘要： In a fluid tensioner of the piston and cylinder type an annular element is provided either on the piston or on the wall of the cylinder. In the case of an annular element on the wall of the piston, the annular element has a coefficient of linear expansion greater than that of the wall of the cylinder. In the case of an annular element on the wall of the cylinder, the annular element has a coefficient of linear expansion less than that of the piston material. In both cases, the annular element provides compensation for changes in hydraulic fluid viscosity to maintain a constant leak-down rate, allows for flexibility in the choice of piston, rod and cylinder materials.

4. 发明授权

US5181889A Tensioner for a toothed belt 失效
标题翻译：齿形带张紧器
公开(公告)号：US5181889A
公开(公告)日：1993-01-26
申请号：US707867
申请日：1991-05-30
申请人： Masao Maruyama , Nobuto Kozakura , Katsuya Nakakubo
发明人： Masao Maruyama , Nobuto Kozakura , Katsuya Nakakubo
IPC分类号： F16F9/10 , F16H7/08 , F16H7/12 , F16K15/04
CPC分类号： F16H7/1236 , F16H7/129 , F16H2007/0806 , F16H2007/0859
摘要： A hydraulic fluid tensioner for a toothed belt, having a piston with a piston-carried ball and seat check valve, utilizes a ball pressing spring having a spring force more than 30 times the weight of the ball and less than 60% of force resulting from the hydraulic pressure acting on the ball and urging the check valve open as the piston moves in the projecting direction. The spring force prevents rapid accelerating movement of the piston, or vibrations of the tensioner, from causing irregular piston movements resulting in noise and vibration.
摘要翻译：用于齿形带的液压流体张紧器具有带有活塞承载球和座椅止回阀的活塞，利用弹簧力超过球的重量的30倍的弹簧力，并且小于由球的重量产生的力的60％当活塞沿突出方向移动时，作用在球上的液压并促使止回阀打开。弹簧力防止活塞的快速加速运动或张紧器的振动导致不规则的活塞运动导致噪音和振动。

5. 发明授权

US06471612B2 Closed hydraulic tensioner 失效
标题翻译：闭式液压张紧器
公开(公告)号：US06471612B2
公开(公告)日：2002-10-29
申请号：US09759569
申请日：2001-01-12
申请人： Katsuya Nakakubo
发明人： Katsuya Nakakubo
IPC分类号： F16H708
CPC分类号： F16H7/0836 , F16H7/1236 , F16H2007/0806 , F16H2007/0812 , F16H2007/0859
摘要： A closed hydraulic tensioner has a high-pressure chamber, a low-pressure chamber and a reservoir that are previously filled with an oil sealed in the hydraulic tensioner. The hydraulic tensioner further has a pressure chamber disposed next to said reservoir with a movable member disposed therebetween so as to displace the movable member toward the reservoir to thereby pressurize the oil inside the reservoir. The pressure chamber is supplied with an oil from the exterior of the tensioner.
摘要翻译：封闭的液压张紧器具有预先填充有密封在液压张紧器中的油的高压室，低压室和储存器。液压张紧器还具有邻近所述储存器设置的压力室，其间设置有可移动构件，以便将可移动构件移向储存器，从而对储存器内部的油进行加压。压力室从张紧器的外部供应油。

6. 发明授权

US6146300A Tensioner device for chain drive mechanism 失效
标题翻译：链条驱动机构的张紧装置
公开(公告)号：US6146300A
公开(公告)日：2000-11-14
申请号：US300996
申请日：1999-04-28
申请人： Tadasu Suzuki , Katsuya Nakakubo , Shigekazu Fukuda
发明人： Tadasu Suzuki , Katsuya Nakakubo , Shigekazu Fukuda
IPC分类号： F16H7/08 , F16H7/00
CPC分类号： F16H7/08 , F16H2007/0806 , F16H2007/0812 , F16H2007/0853 , F16H2007/0859 , F16H2007/0893
摘要： A tensioner device for adjusting a tension in a chain wound around two sprockets includes a tensioner lever held in sliding contact with a slack run of the chain, an oil-filled tensioner provided on a stationary member, and a ratchet tensioner provided on the tensioner lever. The oil-filled tensioner includes a piston movable back and forth relatively to a housing attached to the stationary member, and a spring urging the piston in the forward direction. The ratchet tensioner includes a plunger movable in the forward direction relative to a housing formed integrally with the tensioner lever, and a spring urging the plunger in the forward direction. The piston and the plunger are held in face-to-face abutment with each other. The spring of the oil-filled tensioner has a larger spring coefficient than the spring of the ratchet tensioner. With this construction, when a sag of the chain is in excess of the forward stroke of the piston of the oil-filled tensioner, the plunger of the ratchet tensioner moves forward to cover a shortage of forward stroke of the piston. The tensioner device can continue proper tension-adjusting operation over a long period of use of a chain drive mechanism in which it is incorporated.
摘要翻译：用于调节缠绕在两个链轮上的链条中的张力的张紧器装置包括与链条的松弛行程滑动接触的张紧器杆，设置在固定构件上的充油张紧器和设置在张紧器杆上的棘轮张紧器。充油张紧器包括可相对于附接到固定构件的壳体来回移动的活塞，以及沿向前方向推动活塞的弹簧。棘轮张紧器包括可相对于与张紧器杆一体地形成的壳体向前方移动的柱塞和沿向前方向推动柱塞的弹簧。活塞和柱塞彼此面对面地抵接。充油张紧器的弹簧具有比棘轮张紧器的弹簧更大的弹簧系数。利用这种结构，当链条的下垂超过充满油的张紧器的活塞的向前冲程时，棘轮张紧器的柱塞向前移动以覆盖活塞向前冲程的不足。张紧器装置可以在其被并入的链条驱动机构的长时间使用中继续适当的张力调节操作。

7. 发明授权

US5709625A Hydraulic tensioner 失效
标题翻译：液压张紧器
公开(公告)号：US5709625A
公开(公告)日：1998-01-20
申请号：US641080
申请日：1996-04-26
申请人： Katsuya Nakakubo , Sumio Watanabe
发明人： Katsuya Nakakubo , Sumio Watanabe
IPC分类号： F02B67/06 , F01L1/02 , F15B15/14 , F16H7/08 , F16H7/12
CPC分类号： F01L1/024 , F01L1/02 , F01L1/022 , F15B15/14 , F02B67/06 , F16H2007/0859
摘要： A hydraulic tensioner 10 includes a hollow housing 14 having formed therewith an intermediate partition wall 12, a circular hollow cylinder 16 disposed concentrically in the housing 14, and a piston rod 18 slidably received in the cylinder 16 with a small gap or clearance therebetween. The cylinder 16 and the piston rod 18 jointly define therebetween a high pressure oil chamber 20. The pressure in the high pressure oil chamber 20 counteracts the force tending to retract the piston rod 18. The piston rod 18 projects from an open end of the housing 14, and a seal 24 surrounds the piston rod 18 to seal or close the end of the housing 14. The piston rod 18 has secured thereto a rod guide 28 disposed within the low pressure oil chamber 26. A spring 36 is disposed in a compressed condition between the housing 14 and the rod guide 28 to urge the piston rod 18 in the advancing direction. The rod guide 28 has radially elongated oil holes or passages 38 formed in its surface which engages the spring 36. The oil passages 38 extend radially outwardly from an inner peripheral surface of the rod guide 28 press fitted with the piston rod 18 and also extends axially through the rod guide 28, and are positioned so that they are not closed by the end of the spring.
摘要翻译：液压张紧器10包括中空壳体14，其中形成有中间分隔壁12，同心地设置在壳体14中的圆形中空圆柱体16和可滑动地容纳在气缸16中的活塞杆18，其间具有小的间隙或间隙。气缸16和活塞杆18在其间共同限定高压油室20.高压油室20中的压力抵抗倾向于缩回活塞杆18的力。活塞杆18从壳体的开口端突出并且密封件24围绕活塞杆18以密封或关闭壳体14的端部。活塞杆18固定到其上，设置在低压油室26内的杆引导件28.弹簧36设置在压缩在壳体14和杆导向件28之间的状态，以便沿前进方向推动活塞杆18。杆导向件28具有形成在其表面上的径向细长的油孔或通道38，其与弹簧36接合。油通道38从压杆配合活塞杆18的杆导向器28的内周表面径向向外延伸，通过杆导向件28定位，使得它们不被弹簧的端部封闭。

8. 发明授权

US5167402A Hydraulic pressure apparatus with air scavenging 失效
标题翻译：带空气清扫的液压装置
公开(公告)号：US5167402A
公开(公告)日：1992-12-01
申请号：US830138
申请日：1992-01-31
申请人： Katsuya Nakakubo , Norio Harada , Nobuto Kozakura
发明人： Katsuya Nakakubo , Norio Harada , Nobuto Kozakura
IPC分类号： B25B33/00 , F01L1/02 , F01L1/24 , F16F9/32 , F16F9/40 , F16H7/08 , F16H7/12
CPC分类号： B25B33/00 , F01L1/02 , F01L1/022 , F01L1/024 , F01L1/2411 , F16F9/3214 , F16H7/1236 , F16H2007/0806 , F16H2007/0859 , F16H2007/0891
摘要： In a hydraulic tensioner, shock absorber or lash adjuster having a plunger in a cylinder filled with hydraulic fluid, and having a coiled compression spring acting on the plunger in a pressure chamber on one side of the plunger, air scavenging through the restricted space between the plunger and the cylinder wall is improved by providing radial grooves either on a face of the plunger contacted by the spring, or on the spring-contacting face of a plug which is located between the spring and the plunger. The radial grooves enable air to escape from the interior of the coil spring and move toward the cylinder wall. The grooves increase in depth proceeding from the interior of the spring toward the exterior thereof.
摘要翻译：在液压张紧器，缓冲器或间隙调节器中，在柱塞中装有液压流体，并且在柱塞的一侧上的压力室中具有作用在柱塞上的螺旋压缩弹簧，通过在与弹簧接触的柱塞的表面上或在位于弹簧和柱塞之间的塞子的弹簧接触面上提供径向凹槽来改善柱塞和气缸壁。径向沟槽使得空气从螺旋弹簧的内部逸出并朝向气缸壁移动。凹槽从弹簧的内部朝向其外部增加深度。

9. 发明授权

US5073149A Diaphragm seal type tensioner 失效
标题翻译：膜片密封型张力器
公开(公告)号：US5073149A
公开(公告)日：1991-12-17
申请号：US626734
申请日：1990-12-13
申请人： Masao Maruyama , Nobuto Kozakura , Katsuya Nakakubo , Nobuo Okamoto
发明人： Masao Maruyama , Nobuto Kozakura , Katsuya Nakakubo , Nobuo Okamoto
IPC分类号： F16H7/12 , F16H7/08
CPC分类号： F16H7/08 , F16H7/0848 , F16H2007/0806 , F16H2007/0812 , F16H2007/0859 , F16H2007/0878 , F16H2007/0891 , F16H7/0836
摘要： In a fluid tensioner for a camshaft drive belt, a piston rod is sealed by a flexible diaphragm having an enlarged inner end clamped in a conforming groove in the piston rod by a spring clamp. This maintains the inner end of the diaphragm at a fixed position on the piston rod, and provides a labyrinthine seal preventing leakage of fluid. A flattened portion of the piston rod fits a D-shaped opening in a cap to prevent rotation of the piston rod and premature failure of the seal. A dust seal located on the cap also has a D-shaped hole, aligned with the D-shaped hole in the cap, and conforming to the flattened part of the piston rod.

10. 发明申请

US20100298078A1 RATCHET-TYPE TENSIONER 审中-公开
标题翻译：手摇式张紧器
公开(公告)号：US20100298078A1
公开(公告)日：2010-11-25
申请号：US12770871
申请日：2010-04-30
申请人： Manabu Hirayama , Takahiro Matsushita , Katsuya Nakakubo , Yuji Kurematsu , Osamu Yoshida , Shintarou Yoshimoto
发明人： Manabu Hirayama , Takahiro Matsushita , Katsuya Nakakubo , Yuji Kurematsu , Osamu Yoshida , Shintarou Yoshimoto
IPC分类号： F16H7/08
CPC分类号： F01L1/02 , F01L1/022 , F16H7/0848 , F16H2007/0806 , F16H2007/0812 , F16H2007/0853 , F16H2007/0859
摘要： In a ratchet tensioner, a linearly moving ratchet for engagement with rack teeth on a plunger is operated a piston that is spring-biased in a direction to engage the ratchet teeth with the rack, and movable by oil pressure in a direction to disengage the ratchet teeth from the rack. The piston is located within a hole in the housing and, with that hole, forms a second high pressure oil chamber that can receive oil through an oil supply path independent of the oil supply path that carries oil to a first high pressure oil chamber formed by the plunger and the tensioner housing.
摘要翻译：在棘轮张紧器中，用于与柱塞上的齿条啮合的直线运动的棘轮被操作，该活塞在与齿条接合棘轮齿的方向上被弹簧偏置，并且通过油压沿使棘轮脱离的方向可移动牙齿从机架上。活塞位于壳体的孔内，并且与该孔形成第二高压油室，该第二高压油室能够通过独立于供油路径的供油路径接收油，将油运送到第一高压油室，该第一高压油室由柱塞和张紧器壳体。

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