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1. 发明专利

JP2013151974A Hydraulic auto tensioner 有权
标题翻译：液压自动张紧器
公开(公告)号：JP2013151974A
公开(公告)日：2013-08-08
申请号：JP2012012895
申请日：2012-01-25
申请人： Ntn Corp , Ntn株式会社
发明人： TANAKA TADAHISA
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic auto tensioner capable of preventing occurrence of hydraulic damper failure and preventing hydraulic damper delay.SOLUTION: In a hydraulic auto tensioner, a lower end part of a sleeve 4 is press-fitted into a sleeve fitting hole 3 formed in a bottom face of a cylinder 1; a lower end of a rod 5 is slidably fitted in the sleeve; and a return spring 8 is assembled between a spring seat 7 disposed on an upper part of the rod and the bottom face of the cylinder. A channel 14 for the communication between a pressure chamber 6 and a reservoir chamber 13 is formed between the sleeve fitting hole and a fitting surface of the sleeve; and a check valve 15 is assembled in the channel. A valve fitting hole 16 and an oil channel 17 for the communication between the valve fitting hole and the reservoir chamber are formed in the rod; and a relief valve 20 is assembled in the valve fitting hole. An orifice is formed between a valve element 23 and a valve hole formed in a valve seat 21 of the relief valve. With the orifice, a sudden pressure reduction in the pressure chamber is suppressed; and occurrence of hydraulic damper failure is prevented and hydraulic damper delay is also prevented.
摘要翻译：要解决的问题：提供一种能够防止液压阻尼器故障发生并防止液压阻尼器延迟的液压自动张紧器。解决方案：在液压自动张紧器中，套筒4的下端部压配合到套筒安装孔 3形成在气缸1的底面上; 杆5的下端可滑动地装配在套筒中; 并且复位弹簧8组装在设置在杆的上部的弹簧座7和气缸的底面之间。用于在压力室6和储存室13之间的连通的通道14形成在套筒配合孔和套筒的配合表面之间; 止回阀15组装在通道中。在该杆中形成有用于阀装配孔和储存室之间的连通的阀装配孔16和油通道17。并且安装阀20组装在阀装配孔中。在阀元件23和形成在安全阀的阀座21中的阀孔之间形成孔口。利用孔口，抑制压力室中的突然的压力降低; 并且防止了液压阻尼器故障的发生，并且还防止了液压阻尼器延迟。

2. 发明专利

JP2012172831A Chain tensioner 有权
标题翻译：链条张紧器
公开(公告)号：JP2012172831A
公开(公告)日：2012-09-10
申请号：JP2011038608
申请日：2011-02-24
申请人： Ntn Corp , Ntn株式会社
发明人： TANAKA TADAHISA
IPC分类号： F16H7/08
摘要： PROBLEM TO BE SOLVED: To provide a chain tensioner which is formed so that air hardly stays in a pressure chamber when the chain tensioner is fitted downward, and has excellent maintainability.SOLUTION: A chain tensioner 1 includes: a cylinder 10; a reservoir tank 14 fixed detachably in the upper-end opening of the cylinder 10; a piston 19 provided at the lower end of a rod 18 provided coaxially in the cylinder 10; a plunger 11 slidably fitted to the outer periphery of the piston 19 while protruding from the lower-end opening of the cylinder 10; an oil passage 22 making a pressure chamber 21 surrounded with the plunger 11 and a piston 19 and the reservoir tank 14 communicate with each other; and a return spring 33 the upper end of which is supported by the reservoir tank 14 and the lower end of which energizes the plunger 11 in a direction protruding from the cylinder 10, and is configured to press a chain guide 8 with the projection end of the plunger 11 from the cylinder 10.
摘要翻译：要解决的问题：提供一种链条张紧器，其形成为当链条张紧器向下装配时，空气几乎不停留在压力室中，并且具有优异的可维护性。链条张紧器1包括：气缸10; 可拆卸地固定在缸体10的上端开口中的储存罐14; 设置在同轴地设置在气缸10中的杆18的下端的活塞19; 柱塞11，其从气缸10的下端开口突出地可滑动地装配到活塞19的外周; 由柱塞11围绕的压力室21和活塞19以及储液罐14连通的油路22; 以及复位弹簧33，其上端由储液箱14支撑，其下端在从气缸10突出的方向上向柱塞11供能，并且构造成将链条导向件8按压来自气缸10的柱塞11.版权所有（C）2012，JPO＆INPIT

3. 发明专利

JP2009257412A Hydraulic automatic tensioner 审中-公开
标题翻译：液压自动张力器
公开(公告)号：JP2009257412A
公开(公告)日：2009-11-05
申请号：JP2008105727
申请日：2008-04-15
申请人： Ntn Corp , Ntn株式会社
发明人： GOTO SHIRO , TANAKA TADAHISA
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic automatic tensioner capable of preventing intrusion of a foreign material from an open part of a vent.
SOLUTION: A sleeve 13 is provided in a cylinder 11, and a lower end of a rod 14 is slidably inserted into the sleeve 13 to form a pressure chamber 15 inside the sleeve 13, and pushing force of a return spring 19 is applied to a spring seat 18 provided in an upper part of the rod. A bellows 22 is installed between the periphery of the spring seat and an upper part of the cylinder to form a reservoir chamber 23 between the cylinder and the sleeve. A first check valve 25 is provided in a first oil passage 24 communicating the reservoir chamber and the pressure chamber with each other, and when the cylinder is loaded with pushing force, a hydraulic fluid inside the pressure chamber buffers the pushing force. A vent fitting hole 42 and a ventilation passage 43 are provided in the spring seat, and a vent 44 is incorporated in the vent fitting hole. The pressure inside the reservoir chamber is changed to make the outside air flow into the reservoir chamber or to make the air inside the reservoir chamber flow out. A labyrinth 49 is formed in the ventilation passage to prevent a flow of foreign materials into the reservoir chamber.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够防止异物从通风口的开放部分入侵的液压自动张紧器。解决方案：套筒13设置在气缸11中，杆14的下端可滑动地插入套筒13中，以在套筒13内部形成压力室15，并且复位弹簧19的推力为施加到设置在杆的上部的弹簧座18。波纹管22安装在弹簧座的周边和气缸的上部之间，以在气缸和套筒之间形成储存室23。第一止回阀25设置在使储存室和压力室彼此连通的第一油路24中，并且当缸被加载推力时，压力室内的液压流体缓冲推力。在弹簧座上设置有排气孔装配孔42和通风道43，并且在排气口装配孔内装有排气口44。改变储存室内部的压力，使外部空气流入储存室或使贮存室内的空气流出。在通风通道中形成有迷宫49，以防止异物流入储存室。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2009162378A Automatic tensioner 审中-公开
标题翻译：自动张紧器
公开(公告)号：JP2009162378A
公开(公告)日：2009-07-23
申请号：JP2008276566
申请日：2008-10-28
申请人： Ntn Corp , Ntn株式会社
发明人： TANAKA TADAHISA , GOTO SHIRO
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To provide an automatic tensioner capable of preventing the leakage of a working fluid in a cylinder. SOLUTION: In the automatic tensioner 5, a sleeve 10 is fixed in a cylinder 9 coaxially with the cylinder 9, a rod 12 is slidably inserted into the sleeve 10, the inside of the cylinder 9 is partitioned into a pressure chamber 13 and a reservoir chamber 14, the pressure chamber 13 and the reservoir chamber 14 are made to communicate with each other through a first passage 18 having a check valve 19, the pressure chamber 13 and the reservoir chamber 14 are made to communicate with each other through a second passage 25 having a throttle, the second passage 25 reaches the reservoir chamber 14 after passing through the inside of the rod 12 and the inside of a spring seat 15 from the pressure chamber 13 in order, and an end of the second passage 25 on the reservoir chamber 14 side is opened to a lower surface of the spring seat 15. An oil guide 26 for receiving the working fluid leaked from an opening of the second passage 25 on the reservoir chamber 14 side and guiding the working fluid to the outer periphery of the rod 12 is provided in the reservoir chamber 14. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够防止工作流体在气缸中泄漏的自动张紧器。解决方案：在自动张紧器5中，套筒10与气缸9同轴地固定在气缸9中，杆12可滑动地插入套管10中，气缸9的内部被分隔成压力室13 并且通过具有止回阀19的第一通道18使压力室13和储存室14彼此连通，使压力室13和储存室14彼此连通，使压力室13和储存室14彼此连通具有节气门的第二通道25，第二通道25在经过杆12的内部和弹簧座15的内部之后依次从压力室13到达储存室14，并且第二通道25的一端在储存室14侧向弹簧座15的下表面开口。一个油引导件26，用于接收从储存室14侧的第二通道25的开口泄漏的工作流体，并引导工作流体在储存室14中设置有连接到杆12的外周。（C）版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2009024715A Automatic tensioner 审中-公开
标题翻译：自动张紧器
公开(公告)号：JP2009024715A
公开(公告)日：2009-02-05
申请号：JP2007185528
申请日：2007-07-17
申请人： Ntn Corp , Ntn株式会社
发明人： TANAKA TADAHISA , IZUTSU TOMOYOSHI
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To provide an automatic tensioner in which the fixing strength of a guide sleeve is hard to drop when the temperature of an engine rises.
SOLUTION: Hydraulic oil is stored inside of a cylinder 10. An embedded steel sleeve 11 fixed by insert-molding is provided at the bottom 9 of the cylinder 10. The lower outer periphery of a steel guide sleeve 13 is press-fitted into the embedded sleeve 11. A rod 14 is slidably inserted into the guide sleeve 13 to partition the inside of the cylinder 10 into a pressure chamber 15 and a reservoir chamber 16. The pressure chamber 15 and the reservoir chamber 16 are communicated with each other through a leak clearance 17 formed between the sliding surfaces of the guide sleeve 13 and the rod 14. The pressure chamber 15 and the reservoir chamber 16 are communicated with each other through an oil passage, in which a seal ring 20 is provided that allows the hydraulic oil to flow through an oil passage 19 only from the reservoir chamber 16 side to the pressure chamber 15 side. A return spring 24 is provided that urges the rod 14 in the direction enlarging the volume of the pressure chamber 15. The above configuration is adopted in the automatic tensioner.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种自动张紧器，其中当发动机的温度升高时导向套筒的固定强度难以下降。解决方案：液压油储存在汽缸10的内部。在气缸10的底部9处设有通过嵌件成型固定的嵌入式钢套筒11.钢导套13的下外周被压配合杆14可滑动地插入引导套13中，以将气缸10的内部分隔成压力室15和储存室16.压力室15和储存室16彼此连通通过形成在导向套筒13的滑动表面和杆14之间的泄漏间隙17.压力室15和储存室16通过油通道彼此连通，在该油路中设置有密封环20，液压油仅通过油路19从储存室16侧流到压力室15侧。提供了一个复位弹簧24，其沿着扩大压力室15的容积的方向推动杆14.在自动张紧器中采用上述构造。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JP2008180269A Hydraulic automatic tensioner 审中-公开
标题翻译：液压自动张力器
公开(公告)号：JP2008180269A
公开(公告)日：2008-08-07
申请号：JP2007013610
申请日：2007-01-24
申请人： Ntn Corp , Ntn株式会社
发明人： TANAKA TADAHISA , GOTO SHIRO , AZUMA TOSHIAKI
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To reduce the axial length of a hydraulic automatic tensioner and prevent deficiency in supply of hydraulic oil to a pressure chamber by facilitating opening of a valve disc in a high-frequency region so as to prevent a reduction in load of a hydraulic damper.
SOLUTION: A passage 26 serving for communication between the pressure chamber 17 and a reservoir chamber 18 is formed in a flange 14. The passage 26 is adapted to be opened and closed by a valve disc 27 provided below the flange 14, thereby reducing the axial length of the hydraulic automatic tensioner. The valve disc 27 is urged by a resilient member 29 in a direction that the valve disc 27 is separated from a lower face of the flange 14. The valve disc 27 is immediately released when the pressure in the pressure chamber 17 is decreased so as to prevent a delay in opening of the valve element 27 in the region where a belt vibrates at high frequency and also prevent a reduction in load of the hydraulic damper by the hydraulic oil in the pressure chamber 17.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了减少液压自动张紧器的轴向长度，并且通过有利于在高频区域中打开阀盘来防止液压油向压力室供应的不足以防止减小液压阻尼器的负载。解决方案：用于在压力室17和储存室18之间连通的通道26形成在凸缘14中。通道26适于由设置在凸缘14下方的阀盘27打开和关闭，从而减少液压自动张紧器的轴向长度。阀盘27由弹性构件29沿着阀盘27与凸缘14的下表面分离的方向推动。当压力室17中的压力减小时，阀盘27立即释放，以便防止带子在高频下振动的区域中的阀元件27的打开延迟，并且还防止液压阻尼器在压力室17中的液压油的负载减小。（C）2008 ，JPO＆INPIT

7. 发明专利

JP2008180243A Hydraulic automatic tensioner 审中-公开
标题翻译：液压自动张力器
公开(公告)号：JP2008180243A
公开(公告)日：2008-08-07
申请号：JP2007012459
申请日：2007-01-23
申请人： Ntn Corp , Ntn株式会社
发明人： TANAKA TADAHISA , IZUTSU TOMOYOSHI , NAKAO GORO
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic automatic tensioner improved in follow-up performance with respect to a change in tensile force of a belt and having a reduced axial length.
SOLUTION: A sleeve 13 is installed into a cylinder 11 filled with hydraulic oil, and a flange 14 provided at the lower end of the sleeve is supported by a step part 15 formed at a lower part of the inner periphery of the cylinder. A rod 16 is inserted in the sleeve to partition the inside of the cylinder into a pressure chamber 17 and a reservoir chamber 18. The rod is applied with elastic force of a return spring 21. A plurality of passages 27 serving for communication between the pressure chamber and the reservoir chamber are formed in the flange. A valve disc 29 that closes each passage when the pressure of the pressure chamber becomes higher than that of the reservoir chamber is provided at an opening end part of the passage on the side of the pressure chamber. The valve disc is in a spherical shape so that it can easily separate from the opening end of the passage, thereby enhancing the responsiveness of opening/closing of the valve element to pressure change of the pressure chamber and improving the follow-up performance of the rod with respect to the change in tensile force of the belt.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种相对于带的张力变化并具有减小的轴向长度而提高后续性能的液压自动张紧器。解决方案：套筒13安装在充满液压油的气缸11中，设置在套筒下端的凸缘14由形成在气缸内周的下部的台阶部15支撑。杆16插入到套筒中以将气缸的内部分隔成压力室17和储存室18.杆被施加有复位弹簧21的弹力。多个通道27用于压力室和储存室形成在凸缘中。当在压力室一侧的通道的开口端部设置有当压力室的压力变得高于储存室的压力时关闭每个通道的阀盘29。阀盘是球形的，使得它可以容易地从通道的开口端分离，从而增强了阀元件的打开/关闭对压力室的压力变化的响应性，并提高了压力室的后续性能相对于带的拉伸力的变化。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2008045692A Hydraulic automatic tensioner 审中-公开
标题翻译：液压自动张力器
公开(公告)号：JP2008045692A
公开(公告)日：2008-02-28
申请号：JP2006223339
申请日：2006-08-18
申请人： Ntn Corp , Ntn株式会社
发明人： MINENO KATSUNORI , TANAKA TADAHISA
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To compact the axial length of a hydraulic automatic tensioner opening/closing a passage serving for communication between a pressure chamber and a reservoir chamber by a check valve to buffer press-in force loaded to a rod by a hydraulic oil sealed in the pressure chamber. SOLUTION: A sleeve 13 is assembled into a cylinder 11 filled with the hydraulic oil, and a flange 14 provided at the lower end of the sleeve 13 is supported by a step part 15 formed at a lower part of the inner periphery of the cylinder 11. A rod 16 is inserted in the sleeve 13 to partition the inside of the cylinder 11 into the pressure chamber 17 and the reservoir chamber 18. The rod 16 is biased by a return spring 21. A arcuate passage 27 serving for communication between the pressure chamber 17 and the reservoir chamber 18 is formed in the flange 14. A valve element 32 of the check valve 30 opening/closing the arcuate passage 27 is provided to freely get into contact with and separate from a seat surface 31 formed at the lower face of the flange 14, and the valve element 32 is biased by a valve spring 33. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了压缩液压自动张紧器的轴向长度，通过止回阀打开/关闭用于压力室和储存室之间连通的通道，以缓冲加载到杆的压入力液压油密封在压力室中。解决方案：将套筒13组装到装有液压油的气缸11中，并且设置在套筒13的下端的凸缘14被形成在内周的下部的台阶部15 气缸11.杆16插入套管13中以将气缸11的内部分隔成压力室17和储存室18.杆16被回位弹簧21偏压。用于连通的弧形通道27 压力室17和贮存室18之间形成有凸缘14。打开/关闭弓形通道27的止回阀30的阀元件32被设置成自由地与形成在阀座31的座表面31接触并与其分离凸缘14的下表面和阀元件32被阀弹簧33偏压。版权所有（C）2008，JPO＆INPIT

9. 发明专利

JP2008032122A Hydraulic auto-tensioner 审中-公开
标题翻译：液压自动张紧器
公开(公告)号：JP2008032122A
公开(公告)日：2008-02-14
申请号：JP2006206413
申请日：2006-07-28
申请人： Ntn Corp , Ntn株式会社
发明人： MINENO KATSUNORI , TANAKA TADAHISA
IPC分类号： F16H7/12
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic auto-tensioner in which a bellows is prevented from coming out and a hydraulic oil is prevented from spouting.
SOLUTION: A sleeve 4 is installed in a cylinder 1 filled with a hydraulic oil. A pressure chamber 6 is formed in the sleeve 4 by slidably inserting the lower end of a rod 5 into the sleeve 4. A return spring 8 is assembled between a spring seat 7 formed at the upper part of the rod 5 and the inside bottom surface of the cylinder 1 to bias the cylinder 1 and the rod 5 in the extending direction. An extensible bellows 11 is installed between the outer periphery of the spring seat 7 and the upper part of the cylinder 1 to form a reservoir chamber 17 between the cylinder 1 and the sleeve 4. A check valve 19 is installed in a passage 18 allowing the reservoir chamber 17 to communicate with the pressure chamber 6. A through-hole 25 allowing the outside to communicate with the reservoir chamber 17 is formed in the spring seat 7. The male screw 26a formed on the outer periphery of a screw member 26 is screwed with the female screw 25a formed in the inner periphery of the through-hole 25. The reservoir chamber 17 is connected to the outside through thread gaps 27 formed at the screw engagement part.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种液压自动张紧器，其中防止波纹管脱出并且防止液压油喷射。解决方案：套筒4安装在充满液压油的气缸1中。通过将杆5的下端可滑动地插入套筒4中，在套筒4中形成有压力室6.复位弹簧8组装在形成在杆5的上部的弹簧座7和内侧底面以使气缸1和杆5沿延伸方向偏压。可弹性的波纹管11安装在弹簧座7的外周和气缸1的上部之间，以在气缸1和套筒4之间形成储存室17.止回阀19安装在通道18中，储存室17与压力室6连通。在弹簧座7中形成允许外部与储存室17连通的通孔25.形成在螺钉构件26的外周上的外螺纹26a被螺纹连接其中形成在通孔25的内周中的内螺纹25a。储存室17通过形成在螺钉接合部分处的螺纹间隙27连接到外部。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2007315560A Hydraulic automatic tensioner 审中-公开
标题翻译：液压自动张力器
公开(公告)号：JP2007315560A
公开(公告)日：2007-12-06
申请号：JP2006148377
申请日：2006-05-29
申请人： Ntn Corp , Ntn株式会社
发明人： MINENO KATSUNORI , TANAKA TADAHISA
IPC分类号： F16H7/12
CPC分类号： F16H2007/0817
摘要： PROBLEM TO BE SOLVED: To provide a hydraulic automatic tensioner preventing a bellows from coming off and working fluid from blowing out. SOLUTION: A sleeve 4 is provided in a cylinder 1 filled with working fluid and a pressure chamber 6 is formed in the sleeve 4 by slidably inserting a lower end part of a rod 5 in the sleeve 4. A return spring 8 is built between an inner bottom surface of the cylinder 1 and a spring seat 7 provided at an upper part of the rod 5 to energize the cylinder 1 and the rod 5 in an extension direction. The bellows 11 which can extend and contract is installed between an outer circumference of the spring seat 7 and an upper part of the cylinder 1 to form a reservoir chamber 17. Two ventilation holes 25, 26 establishing communication between an outside and the reservoir chamber 17 are provided on the spring seat 7. A suction check valve 30 is built in one ventilation hole 25 and a delivery check valve 31 is built on another ventilation hole 26. When pressure changes due to volume change of the reservoir chamber 17, one of the suction and the delivery check valve 31 is opened to keep pressure in the reservoir chamber 17 constant. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种防止波纹管脱落和工作流体吹出的液压自动张紧器。解决方案：套筒4设置在填充有工作流体的气缸1中，并且通过将杆5的下端部分可滑动地插入套筒4中而形成在套筒4中的压力室6.复位弹簧8 内置在气缸1的内底表面和设置在杆5的上部的弹簧座7之间，以沿着延伸方向对气缸1和杆5通电。可以延伸和收缩的波纹管11安装在弹簧座7的外圆周和气缸1的上部之间以形成储存室17.两个通风孔25,26在外部和储存室17之间建立连通设置在弹簧座7上。吸入止回阀30内置在一个通气孔25中，并且排放止回阀31构建在另一个通风孔26上。当压力由于储存室17的体积变化而变化时，抽吸和排出止回阀31打开以保持储存室17中的压力恒定。版权所有（C）2008，JPO＆INPIT

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