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1. 发明申请

US20070006676A1 Ball screw and electric power steering device including the same 审中-公开
标题翻译：滚珠丝杠和电动助力转向装置包括它
公开(公告)号：US20070006676A1
公开(公告)日：2007-01-11
申请号：US10558282
申请日：2004-05-28
申请人： Masato Mizuhara , Atsuya Miyata , Tetsuya Murakami , Nobushige Takada
发明人： Masato Mizuhara , Atsuya Miyata , Tetsuya Murakami , Nobushige Takada
IPC分类号： F16H1/24
CPC分类号： F16H25/2214 , B62D5/0448 , Y10T74/19767
摘要： A ball screw (26) includes a screw shaft (29) a nut (25) surrounding the screw shaft (29), and a plurality of balls (30) engageable with the screw shaft (29) and the nut (25). The ball screw (26) includes first and second raceways (S, K). The first raceway (S) is defined between the screw shaft (29) and the nut (25), and has first and second ends (S1, S2). The second raceway (K) has first and second ends (K1, K2) respectively connected to the first and second ends (S1, S2) of the first raceway (S) for circulating the balls (30) into the first raceway (S). The second raceway (K) accommodates an odd number of balls (30) at the maximum at a time.
摘要翻译：滚珠丝杠（26）包括螺旋轴（29），围绕螺杆轴（29）的螺母（25）和与螺纹轴（29）和螺母（25）啮合的多个滚珠（30）。滚珠丝杠（26）包括第一和第二滚道（S，K）。第一滚道（S）限定在螺杆轴（29）和螺母（25）之间，并具有第一和第二端（S1，S2）。第二滚道（K）具有分别连接到第一滚道（S）的第一和第二端（S 1，S 2）的第一和第二端（K 1，K 2），用于将滚珠（30）循环到第一滚道跑道（S）。第二个跑道（K）一次容纳最多的奇数球（30）。

2. 发明授权

US07128183B2 Electric power steering apparatus 失效
标题翻译：电动助力转向装置
公开(公告)号：US07128183B2
公开(公告)日：2006-10-31
申请号：US10849780
申请日：2004-05-21
申请人： Takehiro Saruwatari , Tetsuya Murakami , Kensaku Nakamura , Kousuke Yamanaka , Masato Mizuhara , Atsuya Miyata
发明人： Takehiro Saruwatari , Tetsuya Murakami , Kensaku Nakamura , Kousuke Yamanaka , Masato Mizuhara , Atsuya Miyata
IPC分类号： B62D5/04
CPC分类号： B62D5/0421 , F16H55/18 , F16H2055/185 , Y10T74/19633
摘要： An electric power steering apparatus comprises a speed reduction mechanism for decelerating the rotation of an output shaft in an electric motor for steering assist. The speed reduction mechanism comprises a driving gear connected to the output shaft in the electric motor and a driven gear meshed with the driving gear. One of respective tooth sections in the driving gear and the driven gear includes a tooth section formed of a material having a relatively low hardness, and the other tooth section includes a tooth section formed of a material having a relatively high hardness. The profile of the tooth section formed of the material having a relatively low hardness is shifted in the direction in which the thickness at the root of the teeth of the tooth section is increased. The profile of the tooth section formed of the material having a relatively high hardness is shifted in the direction in which the thickness at the root of the teeth of the tooth section is decreased.
摘要翻译：电动助力转向装置包括用于减速用于转向辅助的电动机中的输出轴的旋转的减速机构。减速机构包括连接到电动机中的输出轴的驱动齿轮和与驱动齿轮啮合的从动齿轮。驱动齿轮和从动齿轮中的一个齿部包括由具有较低硬度的材料形成的齿部，另一个齿部包括由具有较高硬度的材料形成的齿部。由具有相对较低硬度的材料形成的齿部的轮廓在齿部的齿根部的厚度增加的方向上偏移。由具有相对较高硬度的材料形成的齿部的轮廓在齿部的齿根部的厚度减小的方向上移动。

3. 发明授权

US07322256B2 Ball screw mechanism for electric power steering apparatus 失效
标题翻译：电动助力转向装置的滚珠丝杠机构
公开(公告)号：US07322256B2
公开(公告)日：2008-01-29
申请号：US10806805
申请日：2004-03-23
申请人： Masato Mizuhara , Satoshi Hatakeyama , Tetsuya Murakami , Yasuhiro Nakamura
发明人： Masato Mizuhara , Satoshi Hatakeyama , Tetsuya Murakami , Yasuhiro Nakamura
IPC分类号： F16H35/00
CPC分类号： F16H25/2214 , B62D5/0448 , Y10T74/19753
摘要： A first ball circulating hole and a second ball circulating hole for connecting a circulator are bored midway at a screw groove formed on an inner circumference of a ball nut, an intermediate groove path between the first and second ball circulating holes becomes the range of a ball screw track for circulating balls, and other ranges become a first outer track and a second outer track which are not the ball screw track. By making the groove depth of the intermediate groove path deeper than the groove depth of a first groove path of the first outer track and the groove depth of a second groove path of the second outer track, steps are formed between the ball screw track and the two outer tracks. These steps prevent an outflow of the balls from the intermediate groove path to the respective groove paths of the outer tracks.
摘要翻译：用于连接循环器的第一球循环孔和第二球循环孔在形成于滚珠螺母的内圆周上的螺纹槽的中途钻孔，第一和第二球循环孔之间的中间槽路径成为球的范围用于循环球的螺旋轨道，以及其它范围变为不是滚珠丝杠轨道的第一外轨道和第二外轨道。通过使中间槽路径的槽深度比第一外轨道的第一槽路的槽深度和第二外轨道的第二槽路的槽深度更深，在滚珠丝杠轨道和两条外轨道。这些步骤防止球从中间槽路径流出到外轨道的相应凹槽路径。

4. 发明授权

US07374013B2 Electric power steering apparatus 有权
标题翻译：电动助力转向装置
公开(公告)号：US07374013B2
公开(公告)日：2008-05-20
申请号：US11157151
申请日：2005-06-21
申请人： Masato Mizuhara , Akio Osuka , Shigeo Ishihara , Hisamitsu Hayashi
发明人： Masato Mizuhara , Akio Osuka , Shigeo Ishihara , Hisamitsu Hayashi
IPC分类号： B62D5/04
CPC分类号： B62D5/0421 , F16H55/0886 , Y10T74/19958
摘要： An electric power steering apparatus comprises a steering assisting electric motor having an output shaft and a speed reduction mechanism. The speed reduction mechanism includes conical first and second gears to be engaged with each other. The first and second gears include a plurality of teeth each having a tooth surface. The mutually corresponding tooth surfaces of the first and second gears each include engaging regions to be engaged with each other. A center position in a tooth width direction of the engaging region of each tooth surface of the first gear in an unloaded state is offset by a first offset amount from center position in the tooth width direction of the tooth surface of the first gear to a relatively small end portion of the tooth of the first gear. A center position in a tooth width direction of the engaging region of each tooth surface of the second gear in an unloaded state is offset by a second offset amount from a center position in the tooth width direction of the tooth surface of the second gear to a relatively small end portion of the tooth of the second gear.
摘要翻译：电动助力转向装置包括具有输出轴和减速机构的转向辅助电动机。减速机构包括彼此接合的锥形第一和第二齿轮。第一和第二齿轮包括各自具有齿表面的多个齿。第一和第二齿轮的相互对应的齿面各自包括彼此接合的接合区域。第一齿轮的每个齿面的啮合区域的齿宽方向上的中心位置处于无负载状态，该第一齿轮的第一齿轮的齿面方向上的中心位置相对于相对第一档齿的小端部。处于无负载状态的第二齿轮的每个齿面的接合区域的齿宽方向上的中心位置偏移了从第二齿轮的齿面的齿宽方向上的中心位置到第二齿轮的第二偏移量第二齿轮的齿的相对较小的端部。

5. 发明申请

US20060027416A1 Electric power steering appratus 有权
标题翻译：电动助力转向装置
公开(公告)号：US20060027416A1
公开(公告)日：2006-02-09
申请号：US11157151
申请日：2005-06-21
申请人： Masato Mizuhara , Akio Osuka , Shigeo Ishihara , Hisamitsu Hayashi
发明人： Masato Mizuhara , Akio Osuka , Shigeo Ishihara , Hisamitsu Hayashi
IPC分类号： B62D5/04
CPC分类号： B62D5/0421 , F16H55/0886 , Y10T74/19958
摘要： An electric power steering apparatus comprises a steering assisting electric motor having an output shaft and a speed reduction mechanism. The speed reduction mechanism includes conical first and second gears to be engaged with each other. The first and second gears include a plurality of teeth each having a tooth surface. The mutually corresponding tooth surfaces of the first and second gears each include engaging regions to be engaged with each other. A center position in a tooth width direction of the engaging region of each tooth surface of the first gear in an unloaded state is offset by a first offset amount from center position in the tooth width direction of the tooth surface of the first gear to a relatively small end portion of the tooth of the first gear. A cener position in a tooth width direction of the engaging region of each tooth surface of the second gear in an unloaded state is offset by a second offset amount from a center position in the tooth width direction of the tooth surface of the second gear to a relatively small end portion of the tooth of the second gear.
摘要翻译：电动助力转向装置包括具有输出轴和减速机构的转向辅助电动机。减速机构包括彼此接合的锥形第一和第二齿轮。第一和第二齿轮包括各自具有齿表面的多个齿。第一和第二齿轮的相互对应的齿面各自包括彼此接合的接合区域。第一齿轮的每个齿面的啮合区域的齿宽方向上的中心位置处于无负载状态，该第一齿轮的第一齿轮的齿面方向上的中心位置相对于相对第一档齿的小端部。处于无负载状态的第二齿轮的每个齿面的接合区域的齿宽度方向上的转动位置被从第二齿轮的齿面的齿宽方向上的中心位置偏移到第二齿轮的第二偏移量第二齿轮的齿的相对较小的端部。

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