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公开(公告)号：JP2003021217A
公开(公告)日：2003-01-24
申请号：JP2001204287
申请日：2001-07-05
Applicant: Ntn Corp , エヌティエヌ株式会社
Inventor： YOSHIDA ISAMU , IKEDA YOSHINORI , YOSHIOKA MORIHISA
IPC: F16H25/22
Abstract: PROBLEM TO BE SOLVED: To provide a miniaturizable ball screw capable of easily arranging a circulating part for circulating balls at a low load position.
SOLUTION: This ball screw 20 has connection grooves 27 for ball circulation formed on a ball screw shaft 21 and shielding members 28. The connecting grooves 27 connect screw grooves 24 of the ball screw shaft 21 and circulate balls 23. The shielding members 28 are guiding members for returning balls 23 to the initial screw grooves 24 and end surfaces 28a thereof are guiding surfaces. The ball screw shaft 21 is unrotatable and is movable in an axial direction. Piece members having connecting grooves can be installed on the ball screw shaft 21 instead of the connecting grooves 27 and the shielding members 28.
COPYRIGHT: (C)2003,JPOAbstract translation: 要解决的问题：提供一种能够容易地设置用于在低负载位置循环球的循环部件的小型化滚珠丝杠。 解决方案：该滚珠丝杠20具有形成在滚珠丝杠轴21和屏蔽部件28上的用于球循环的连接槽27.连接槽27连接滚珠丝杠轴21的螺纹槽24并使滚珠23循环。 用于将球23返回到初始螺纹槽24和其端面28a的构件是导向表面。 滚珠丝杠轴21是不可旋转的并且可沿轴向移动。 具有连接槽的部件可以安装在滚珠丝杠轴21上而不是连接槽27和屏蔽部件28。
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公开(公告)号：JP2014163416A
公开(公告)日：2014-09-08
申请号：JP2013032822
申请日：2013-02-22
Inventor： TATEISHI YASUSHI , IKEDA YOSHINORI
Abstract: PROBLEM TO BE SOLVED: To provide an electric actuator achieving cost reduction by suppressing generation of noise in a gear reduction mechanism, reducing assembly man-hour and improving assembly workability.SOLUTION: An electric actuator 1 is constituted of: a nut 13 in which a ball screw mechanism 8 is supported in a housing 2 so as to be rotated through a pair of support bearings 14, 15 and so as not to be moved in an axial direction and a spiral screw groove 13a is formed on an inner periphery; and a screw shaft 10 which is inserted into the nut 13 through many balls 12, coaxially integrated with a drive shaft 7, forms a spiral screw groove 10a on an outer periphery and is supported in the housing 2 so as not to be rotated and so as to be moved in the axial direction. In the electric actuator 1, a gear wheel 5 and the pair of support bearings 14, 15 are positioned and fixed on the outer periphery of the nut 13 in a state where the gear wheel 5 is held between both sides and a pinion 4 and the gear wheel 5 are composed of sintered helical gears of which the torsion angle is set to 5 to 15°.
Abstract translation: 要解决的问题：提供一种通过抑制齿轮减速机构中的噪声产生来实现成本降低的电动执行器，减少组装工时并提高组装操作性。解决方案：电动致动器1由以下部件构成：螺母13，其中 滚珠丝杠机构8被支撑在壳体2中，以便通过一对支撑轴承14,15旋转，并且不沿轴向移动，并且在内周上形成螺旋形的螺旋槽13a; 螺杆轴10通过与驱动轴7同轴一体化的许多滚珠12插入到螺母13中，在外周形成螺旋形的螺旋槽10a，并被支撑在壳体2中以便不旋转 以便沿轴向移动。 在电动执行器1中，在齿轮5保持在两侧和小齿轮4之间的状态下，齿轮5和一对支撑轴承14,15定位并固定在螺母13的外周上，并且 齿轮5由扭转角设定为5〜15°的烧结螺旋齿轮构成。
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公开(公告)号：JP2014088919A
公开(公告)日：2014-05-15
申请号：JP2012239631
申请日：2012-10-30
Inventor： FUNADA KENSUKE , IKEDA YOSHINORI , KAZUNO KEISUKE
CPC classification number: F16H25/2204 , F16H2025/2031 , F16H2025/204 , F16H2025/2081 , Y10T74/18576
Abstract: PROBLEM TO BE SOLVED: To provide an electric linear actuator with increased reliability by increasing its durability and strength while reducing its weight as well as damages and abrasions of a housing.SOLUTION: An electric linear actuator 1 includes: a screw shaft 10 non-rotatably and axially movably supported with respect to a housing 2. A sleeve 17 made of sintered alloy is fitted in a bottomed hole 12 of the housing 2 so as to be attached firmly to the bottom. A pair of recessed grooves 17a are formed at positions opposite to each other extending in an axial direction of an inner circumference of the sleeve 17, and a locking pin 15 embedded in an end of the screw shaft 10 is engaged. A tapered chamfer 18c is formed at an end of a nut 18, and an outer diameter on an end face side of the chamfer 18c is set to be smaller than a distance between the recessed grooves 17a.
Abstract translation: 要解决的问题：通过增加其耐用性和强度，同时减小其重量以及壳体的损坏和磨损来提供具有增加的可靠性的电动线性致动器。解决方案：电动线性致动器1包括：螺杆轴10，不可旋转 并且相对于壳体2轴向移动地支撑。由烧结合金制成的套筒17装配在壳体2的有底孔12中，以牢固地附接到底部。 在套筒17的内周的轴向延伸的位置上形成有一对凹槽17a，嵌合在螺杆轴10的端部的锁定销15接合。 锥形倒角18c形成在螺母18的端部，并且倒角18c的端面侧的外径被设定为小于凹槽17a之间的距离。
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公开(公告)号：JP2011047448A
公开(公告)日：2011-03-10
申请号：JP2009195281
申请日：2009-08-26
Inventor： IKEDA YOSHINORI
Abstract: PROBLEM TO BE SOLVED: To provide an electric actuator which reduces electric power consumption of an electric motor and retains a home position against reaction force from a driven side. SOLUTION: A ball screw 6 includes a nut 15 supported in such a manner that the same can freely rotate through a pair of rolling bearings 18, 19 but can not move in an axial direction with respect to a housing 2, and a screw shaft 14 provided in such a manner that the same can not rotate but can relatively move in the axial direction, and converts the rotary motion of an electric motion 3 into linear motion in an axial direction of the screw shaft 14. A rotary shaft 8 is connected to the electric motor 3. A reduction mechanism 23 composed of two rows of gear trains is provided between the rotary shaft 8 and the nut 15. Gears 19, 11 on the rotary shaft 8 side are fixed to the rotary shaft 8 through a shell shaped one way clutches 12, 13 disposed in a relation that lock action directions thereof mutually oppose. Intermediate gears 28, 30 are provided in the reduction mechanism 23. Electromagnetic clutches 31, 32 are connected to the intermediate gears 28, 30. COPYRIGHT: (C)2011,JPO&INPIT
Abstract translation: 要解决的问题：提供一种电动致动器，其减小电动机的电力消耗并保持起始位置抵抗来自被驱动侧的反作用力。 解决方案：滚珠丝杠6包括螺母15，螺母15以这样的方式支撑，使得其能够通过一对滚动轴承18,19自由旋转，但不能相对于壳体2在轴向方向上移动，并且 螺杆轴14以这样的方式设置，使得它们不能旋转但可以在轴向上相对移动，并且将电动3的旋转运动转换成沿着螺杆轴14的轴向的直线运动。旋转轴8 连接到电动机3.在旋转轴8和螺母15之间设置有由两列齿轮系组成的减速机构23.旋转轴8侧的齿轮19,11通过一个旋转轴8固定到旋转轴8 外壳形的单向离合器12,13以与其相互对抗的锁定动作方向的关系设置。 中间齿轮28,30设置在减速机构23中。电磁离合器31,32与中间齿轮28,30连接。版权所有（C）2011，JPO＆INPIT
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公开(公告)号：JP2010078060A
公开(公告)日：2010-04-08
申请号：JP2008247209
申请日：2008-09-26
Inventor： KAZUNO KEISUKE , IKEDA YOSHINORI , TATEISHI YASUSHI
IPC: F16H25/22
Abstract: PROBLEM TO BE SOLVED: To provide a highly reliable roller type ball screw capable of smoothly circulating a ball, by restraining the occurrence of looseness of a piece member, by preventing abrasion of a caulking member in the piece member.
SOLUTION: The piece member 5 has a body part 10 molded by MIM from a sintered alloy and having a cross section formed in a substantially circular shape in response to a piece window 6, and a head part 11 extending outward in the radial direction of a nut 3 from this body part 10. A pair of arms 9 are projected on both sides of the body part 10, and the piece member 5 is positioned by engaging these arms 9 with a screw groove 3a of the nut 3. The head part 11 is formed with a recessed part 12 of recessing an outer diameter surface, and eight guide walls 13 rising from this recessed part 12 and having a circular arc-shaped peripheral surface, are formed in equal arrangement in the peripheral direction. The piece member 5 is fixed to the nut 3 by a caulking part 14 substantially orthogonal to a lead wire L of the screw groove 3a and formed by plastically deforming opposed respective two guide walls 13 among the eight guide walls 13 to the edge part side of the piece window 6.
COPYRIGHT: (C)2010,JPO&INPITAbstract translation: 要解决的问题：为了提供一种高可靠性的滚珠式滚珠丝杠，其能够通过防止零件构件上的铆接构件的磨损来抑制零件的松动，从而能够使球平滑地循环。 解决方案：片件5具有由烧结合金由MIM模制的主体部分10，并且具有响应于件窗6形成为大致圆形形状的横截面，以及在径向上向外延伸的头部11 螺母3的方向。一对臂9突出在主体部10的两侧，并且通过将这些臂9与螺母3的螺纹槽3a接合来定位件5。 头部11形成有凹部外径面的凹部12，并且从该凹部12上升而具有圆弧状的周面的8个引导壁13沿圆周方向相等地形成。 片状构件5通过与螺纹槽3a的引线L大致正交的铆接部14固定在螺母3上，并且通过使八个引导壁13的相对的两个引导壁13相对塑性变形， 作品窗口6.版权所有（C）2010，JPO＆INPIT
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Patent Agency Ranking
公开(公告)号：JP2009079657A
公开(公告)日：2009-04-16
申请号：JP2007248708
申请日：2007-09-26
Inventor： IKEDA YOSHINORI
Abstract: PROBLEM TO BE SOLVED: To provide a lightweight and compact electric linear actuator capable of increasing productivity by improving assembly.
SOLUTION: The electric linear actuator 1 is provided with a screw shaft 4 of a ball screw 7, a rod axis 8 juxtaposed to the screw shaft 4 and supported so as to be movable in the axial direction with respect to the rod 8, a connecting arm 9 which is fixed to the rod axis 8 and whose distal end is engaged with a nut 5. In the electric linear actuator 1 wherein a rotation motion of a motor 3 is converted to an axial motion of the rod axis 8 via the nut 5, the connecting arm 9 is constituted so as to freely rotate in all directions using the axial center of the rod axis 8 as the rotation center, the nut 5 is formed in a rectangular section, a columnar projecting portion 16 is projected oppositely on plane-shaped side surfaces 5b, the distal end 9b of the connecting arm 9 having a recessed portion is formed in a forked shape and is engaged with the projecting portion 16 in a state of pinching the sides 5b, and the nut 5 is constituted so that it cannot rotate and can be freely movable in the axial direction.
COPYRIGHT: (C)2009,JPO&INPITAbstract translation: 要解决的问题：提供能够通过改进组装来提高生产率的轻质且紧凑的电动线性致动器。 解决方案：电动线性致动器1设置有滚珠丝杠7的螺杆轴4，杆轴线8并列于螺杆轴4并被支撑成可相对于杆8沿轴向移动 连接臂9，其固定在杆轴8上，其前端与螺母5接合。在电动线性致动器1中，其中马达3的旋转运动通过杆轴线8的旋转运动经由 螺母5，连杆9构成为以杆轴8的轴心作为旋转中心在各个方向上自由旋转，螺母5形成为矩形截面，柱状突出部16相对地突出 在平面状的侧面5b上，具有凹部的连接臂9的前端9b形成为叉形，并且在夹着侧面5b的状态下与突出部16卡合，并且构成螺母5 所以它不能旋转，可以自由移动我 n轴向。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2008241013A
公开(公告)日：2008-10-09
申请号：JP2007086599
申请日：2007-03-29
Inventor： IKEDA YOSHINORI , TATEISHI YASUSHI
Abstract: PROBLEM TO BE SOLVED: To provide a piece type ball screw attaining smooth circulation of balls to improve reliability by eliminating noncoincidence of grooves without increasing the amount of level difference at a connection part of a thread groove and a connecting groove of a piece member.
SOLUTION: The piece type ball screw comprises the piece member 5 formed with the connecting groove 5a curved in approximately S-shape to connect adjoining thread grooves of a nut 3, and fitted to a piece aperture 6 bored in a body part of the nut 3 with a rolling path as a circulating path. The piece aperture 6 is formed in approximately circular cross section, and the piece member 5 is formed in circular cross section corresponding to the piece aperture 6. Groove walls 8, 9 of an opening in the connection groove 5a has inclination angles α, β respectively to the thread groove 3a of the nut 3, and formed in trumpet shape slightly wider than the connecting groove 5a. The inclination angle β of the outer groove wall 9 is larger than the inclination angle α of the groove wall 8 on the center side, and the average of these inclination angles α, β is set to be almost the same as the angle of the thread groove 3a.
COPYRIGHT: (C)2009,JPO&INPITAbstract translation: 要解决的问题：为了提供一种通过消除不一致的凹槽而提高可靠性的片式滚珠丝杠，而不增加螺纹槽的连接部分和连接槽的连接槽的水平差的量 会员。 解决方案：片式滚珠丝杠包括形成有大致S形弯曲的连接槽5a的零件5，以连接螺母3的相邻螺纹槽，并且装配到钻孔体的主体部分 具有滚动路径的螺母3作为循环路径。 片孔6形成为大致圆形的横截面，并且片构件5形成为与片孔6对应的圆形横截面。连接槽5a中的开口的槽壁8,9分别具有倾斜角α，β 螺母3的螺纹槽3a形成为比连接槽5a稍宽的喇叭形状。 外槽壁9的倾斜角β大于槽壁8的中心侧的倾斜角度α，这些倾斜角度α，β的平均值设定为与螺纹的角度大致相同 槽3a。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2008069862A
公开(公告)日：2008-03-27
申请号：JP2006248913
申请日：2006-09-14
Inventor： IKEDA YOSHINORI , TATEISHI YASUSHI
Abstract: PROBLEM TO BE SOLVED: To provide an electric linear actuator to be able to obtain high reduction rate, and to make a device compact.
SOLUTION: A small gear 5b and a large gear 5a are formed in the right hand in a figure, and in the left hand in the figure in the outer peripheral surface of an intermediate gear 5 respectively. A cylindrical spot facing 5c is formed in a left hand end in a figure of the intermediate gear 5. A shaft end 5d left not drilled through is formed in the middle of the spot facing 5c. A roll bearing 12 is fitted in the shaft end 5d. The roll bearing 12 is arranged in the spot facing 5c. The roll bearing 12 is arranged in a cylindrical bearing case 13 having one end in the left hand of the figure blocked by a wall surface. A hole 13a is drilled through the almost middle of the wall surface of the bearing case 13. The hole 13a is press-fitted into a projection 2c formed in a housing 2a.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 要解决的问题：为了提供能够获得高减速率的电子线性致动器，并且使得装置紧凑。 解决方案：小齿轮5b和大齿轮5a分别以右图形成，并且在图中的左手中分别形成在中间齿轮5的外周表面中。 在中间齿轮5的图中的左手端部形成有圆筒形的面对5c。未被钻穿的轴端5d形成在点对面5c的中间。 辊轴承12安装在轴端5d中。 辊轴承12布置在点对面5c中。 滚动轴承12布置在圆柱形轴承箱13中，其中图中的左侧的一端被壁面阻挡。 孔13a穿过轴承箱13的壁表面的几乎中间被钻孔。孔13a压配合到形成在壳体2a中的突起2c中。 版权所有（C）2008，JPO＆INPIT
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公开(公告)号：JP2007146915A
公开(公告)日：2007-06-14
申请号：JP2005339737
申请日：2005-11-25
Inventor： TATEISHI YASUSHI , IKEDA YOSHINORI , KAZUNO KEISUKE , YOSHIOKA MORIHISA
CPC classification number: F16H25/2223
Abstract: PROBLEM TO BE SOLVED: To provide a piece type ball screw capable of ensuring positioning precision and a fixing force of a piece member to a nut and improving reliability at low cost.
SOLUTION: In this piece type ball screw 1 provided with a screw shaft 2 forming a spiral screw groove 2a on an outer peripheral face, the nut 3 fitted into the screw shaft 2 externally and forming a spiral screw groove 3a on an inner peripheral face, a plurality of balls 4 stored in a rolling passage formed of both opposing screw grooves, and the piece member 5 fitted into a piece window 6 provided at a barrel of the nut 3 and forming a connection groove 8 using the rolling passage as a peripheral turn path. A cross section of the piece window 6 is formed into a substantially circular shape, and the piece member 5 is made of a sintered alloy molded in its cross section into a circular shape by MIM corresponding to the piece window 6. Arms 9 are protrudedly provided on both sides of the piece member 5 and engaged with the screw groove 3a of the nut 3 to position the piece member 5 on the nut 3.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 要解决的问题：提供一种片状滚珠丝杠，其能够确保定位精度和零件对螺母的固定力，并以低成本提高可靠性。 解决方案：在具有在外周面上形成螺旋形螺纹槽2a的螺杆轴2的该片式滚珠丝杠1中，螺母3从外部装配到螺杆轴2中并在内部形成螺旋形的螺纹槽3a 存储在由两个相对的螺纹槽形成的滚动通道中的多个滚珠4和装配在设置在螺母3的筒体上的零件窗6中的零件5，并且使用滚动通道形成连接槽8 外围转弯路径。 片窗6的横截面形成为大致圆形，并且片构件5由其相应于片状窗6的MIM以其截面形成为圆形的烧结合金制成。臂9突出地设置 在零件5的两侧并与螺母3的螺纹槽3a啮合，以将零件5定位在螺母3上。版权所有（C）2007，JPO＆INPIT
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公开(公告)号：JP2006242237A
公开(公告)日：2006-09-14
申请号：JP2005056820
申请日：2005-03-02
Inventor： IKEDA YOSHINORI
Abstract: PROBLEM TO BE SOLVED: To provide a ball screw for an electric brake actuator, preventing the degradation of a service life while reducing one-sided load resulting from radial load which occurs during braking. SOLUTION: The top type ball screw to be used for the electric brake actuator in an automobile with the rotation of a nut comprises a top member 5 having circulation grooves 9 all arranged in approximate 90° different phases relative to the direction of the radial load R on the nut 3 during braking. The ball screw 1 has a plurality of infinite circuits consisting of screw grooves via which a screw stem 2 is opposed to the nut 3, and the circulation grooves 9 provided in the top member 5 for giving infinite circulation to a ball. The circulation grooves 9 in the plurality of infinite circuits are provided in one top member 5, e.g. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract translation: 要解决的问题：为了提供用于电动制动器致动器的滚珠丝杠，防止在制动期间由径向载荷引起的单侧载荷而降低使用寿命。 解决方案：用于具有螺母旋转的汽车中的电动制动致动器的顶部类型的滚珠丝杠包括具有循环槽9的顶部构件5，所述顶部构件5全部相对于 制动期间螺母3上的径向载荷R。 滚珠丝杠1具有多个无限循环，由螺杆槽构成，螺杆2通过螺纹槽螺母3与螺母3相对，而循环槽9设置在顶部构件5中，用于给球提供无限循环。 多个无限电路中的循环槽9设置在一个顶部构件5中，例如， 版权所有（C）2006，JPO＆NCIPI
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