公开(公告)号：US09593758B2

公开(公告)日：2017-03-14

申请号：US14717325

申请日：2015-05-20

Applicant: Toyota Jidosha Kabushiki Kaisha

Inventor： Takashi Kiten

IPC: F16H55/16 ,  F16H55/08

CPC classification number: F16H55/0886 ,  F16H55/08 ,  F16H55/16 ,  F16H2055/086 ,  Y10T74/19972

Abstract: A gear of a gear device includes a plurality of teeth having tooth surfaces. The tooth surfaces are shaped such that contact length ratios of three or more of the teeth are outside a predetermined range centered on an average value of the contact length ratios of all of the teeth, where the contact length ratio is obtained by dividing a contact length of a tooth contact face by a diagonal length of a plane of action.

Abstract translation: 齿轮装置的齿轮包括具有齿表面的多个齿。 齿面成形为使得三个或更多个齿的接触长度比在超过所有齿的接触长度比的平均值的中心的预定范围之外，其中接触长度比通过将接触长度 的齿接触面由作用平面的对角线长度。

公开(公告)号：US09109691B2

公开(公告)日：2015-08-18

申请号：US13749465

申请日：2013-01-24

Applicant: Shinichirou Okamoto

Inventor： Shinichirou Okamoto

IPC: F16H55/08

CPC classification number: F16H55/0806 ,  F16H2055/0893 ,  Y10T74/19949 ,  Y10T74/19963 ,  Y10T74/19972

Abstract: A gear having a tooth form shape including, on a tooth root side of a tooth, a first curved surface connected to a tooth face of an involute tooth form and convex in a direction opposite to the tooth face, a flat surface connected to the first curved surface, and a second curved surface connected to the flat surface and convex in the same direction as the first curved surface. In a normal plane, the shape of the flat surface is a tangent in contact with a tip side end of a trajectory of motion of a tooth of a meshing partner gear and intersecting with a tooth form center line at a 30° angle, the shape of the first curved surface is circular arcs in contact with the tangent, and, the shape of the second curved surface is circular arcs in contact with the tooth face and the tangent.

Abstract translation: 一种具有齿形形状的齿轮，包括在齿的齿根侧上的与渐开线齿形的齿面连接的第一曲面，并且在与所述齿面相反的方向上凸出，所述第一弯曲表面连接到所述第一 弯曲表面和与平坦表面连接并且在与第一弯曲表面相同的方向上凸起的第二弯曲表面。 在正常平面中，平坦表面的形状是与啮合对象齿轮的齿的运动轨迹的尖端侧端部以与30度角的齿形中心线相交的切线，该形状 第一曲面的表面是与切线接触的圆弧，第二曲面的形状是与齿面和切线接触的圆弧。

公开(公告)号：US09052010B2

公开(公告)日：2015-06-09

申请号：US14303675

申请日：2014-06-13

Applicant: Enplas Corporation

Inventor： Yasushi Kajiwara

IPC: F16H55/08

CPC classification number: F16H55/0806 ,  F16H55/08 ,  Y10T74/19949 ,  Y10T74/19972

Abstract: A half of a tooth right-angled cross-sectional shape in a tooth bottom side area of a tooth divided at a tooth bottom center is defined by a first involute portion extending from the tooth bottom center P0 toward a tooth surface, an arcuate portion connected smoothly to the first involute portion, a second involute portion connected smoothly to the arcuate portion, a third involute portion connected smoothly to the second involute portion, and a tooth surface connecting curved portion connecting the third involute portion and the tooth surface smoothly. Radii of curvature of the arcuate portion and the first, second and third involute portions are determined so that a stress variation width in a stress state of a so-called partly reverse state caused by tensile stress and compression stress generated in the tooth bottom side area of the tooth before and after the meshing of the tooth can be uniformized.

Abstract translation: 在齿底部中心分割的齿的齿底侧区域中的直角成角度的一半由从齿底中心P0向齿面延伸的第一渐开线部分限定，弓形部分连接 平滑地延伸到第一渐开线部分，平滑地连接到弧形部分的第二渐开线部分，与第二渐开线部分平滑连接的第三渐开线部分和平滑地连接第三渐开线部分和齿面的弯曲部分的齿面。 圆弧部分和第一，第二和第三渐开线部分的曲率半径被确定为使得由在齿底侧区域中产生的拉伸应力和压缩应力引起的所谓部分反向状态的应力状态下的应力变化宽度 的齿齿啮合前后均匀化。

公开(公告)号：US08744313B2

公开(公告)日：2014-06-03

申请号：US13080102

申请日：2011-04-05

Applicant: Shusuke Miura

Inventor： Shusuke Miura

IPC: G03G15/00

CPC classification number: G03G15/757 ,  Y10T74/19642 ,  Y10T74/19949 ,  Y10T74/19953 ,  Y10T74/19963 ,  Y10T74/19972 ,  Y10T74/19981

Abstract: An image forming apparatus driving unit includes a rotatable member which is rotatably supported, a pair of bearing portions for rotatably supporting the rotatable member, and a motor for driving the rotatable member. In addition, a driving gear is provided on a driving shaft of the motor, and a driven gear, provided outside the pair of bearing portions with respect to a rotational axis direction of the rotatable member, engages with the driving gear to be rotated integrally with the rotatable member. At least one of the driven gear and the driving gear has, with respect to the rotational axis direction of the rotatable member, a crown shape so that a central tooth surface of a tooth projects more than end tooth surfaces of the tooth at a side where the driven gear and the driving gear engage each other. During driving of the driving gear, a first position where a pressure received by the tooth surface is at a maximum and a second position where an amount of crowning formed on the driven gear or the driving gear is at a maximum are offset in a same direction.

Abstract translation: 图像形成装置驱动单元包括可旋转地支撑的可旋转构件，用于可旋转地支撑可旋转构件的一对轴承部分和用于驱动可旋转构件的马达。 另外，在马达的驱动轴上设置有驱动齿轮，并且相对于可旋转构件的旋转轴线方向设置在一对轴承部的外侧的从动齿轮与驱动齿轮接合，以与 可旋转构件。 从动齿轮和驱动齿轮中的至少一个相对于可旋转构件的旋转轴线方向具有冠状形状，使得齿的中心齿面比牙的端齿表面突出多一侧， 从动齿轮和驱动齿轮相互啮合。 在驱动齿轮的驱动期间，由齿面接收的压力处于最大的第一位置和在从动齿轮或驱动齿轮上形成的隆起量最大的第二位置在相同的方向上偏移 。

公开(公告)号：US08578807B2

公开(公告)日：2013-11-12

申请号：US13449569

申请日：2012-04-18

Applicant: Robert F. Kunz ,  Richard B. Medvitz ,  Matthew John Hill

Inventor： Robert F. Kunz ,  Richard B. Medvitz ,  Matthew John Hill

IPC: F16H55/17

CPC classification number: F16H55/17 ,  F16H57/0409 ,  F16H57/0427 ,  Y10T74/19642 ,  Y10T74/1987 ,  Y10T74/19949 ,  Y10T74/19972

Abstract: A gear and drive system utilizing the gear include teeth. Each of the teeth has a first side and a second side opposite the first side that extends from a body of the gear. For each tooth of the gear, a first extended portion is attached to the first side of the tooth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates. The gear may be utilized in drive systems that may have high rotational speeds, such as speeds where the tip velocities are greater than or equal to about 68 m/s. Some embodiments of the gear may also utilize teeth that also have second extended portions attached to the second sides of the teeth to divert flow of fluid adjacent to the body of the gear to reduce windage losses that occur when the gear rotates.

Abstract translation: 使用齿轮的齿轮和驱动系统包括齿。 每个齿具有从齿轮的主体延伸的第一侧和与第一侧相对的第二侧。 对于齿轮的每个齿，第一延伸部分附接到齿的第一侧，以转移与齿轮主体相邻的流体的流动，以减少当齿轮旋转时发生的风阻损失。 齿轮可以用在可能具有高转速的驱动系统中，例如尖端速度大于或等于约68m / s的速度。 齿轮的一些实施例还可以利用也具有连接到齿的第二侧的第二延伸部分的齿，以转移邻近齿轮主体的流体流动，以减少当齿轮旋转时发生的风阻损失。

公开(公告)号：US20130186225A1

公开(公告)日：2013-07-25

申请号：US13749465

申请日：2013-01-24

Applicant: Shinichirou Okamoto

Inventor： Shinichirou Okamoto

IPC: F16H55/08

CPC classification number: F16H55/0806 ,  F16H2055/0893 ,  Y10T74/19949 ,  Y10T74/19963 ,  Y10T74/19972

Abstract: A gear having a tooth form shape including, on a tooth root side of a tooth, a first curved surface connected to a tooth face of an involute tooth form and convex in a direction opposite to the tooth face, a flat surface connected to the first curved surface, and a second curved surface connected to the flat surface and convex in the same direction as the first curved surface. In a normal plane, the shape of the flat surface is a tangent in contact with a tip side end of a trajectory of motion of a tooth of a meshing partner gear and intersecting with a tooth form center line at a 30° angle, the shape of the first curved surface is circular arcs in contact with the tangent, and, the shape of the second curved surface is circular arcs in contact with the tooth face and the tangent.

公开(公告)号：US20130091970A1

公开(公告)日：2013-04-18

申请号：US13705470

申请日：2012-12-05

Applicant: O-OKA CORPORATION

Inventor： Mitsushige O-oka ,  Yoshiki Kawasaki ,  Mitsuhiko Shimomura

IPC: F16H55/02 ,  B21K1/30 ,  F16H55/17

CPC classification number: F16H55/02 ,  B21J5/025 ,  B21K1/30 ,  B21K1/305 ,  F16H55/08 ,  F16H55/0886 ,  F16H55/17 ,  F16H2055/0893 ,  Y10T29/49469 ,  Y10T74/19953 ,  Y10T74/19972

Abstract: A transmission gear has a tooth surface formed of a free-form surface instead of an involute surface and a root area formed of a free-form surface instead of a trochoid surface. With such a transmission gear, the fatigue strength against contact pressure can be increased by reducing the Hertzian stress in the area around the meshing point of the tooth surface. The tooth surface is formed of a free-form surface in which the smallest radius of curvature in an area around a mating pitch point is maximized, and the fatigue strength against bending can be increased by reducing the bending stress at a tooth root portion of the bottom land. In addition, the gear noise can be reduced. The bottom land is formed of a free-form surface in which the smallest radius of curvature in an area around a tooth root is maximized.

Abstract translation: 传动齿轮具有由自由曲面形成的齿面，而不是渐开线面，而是由自由曲面形成的根部区域而不是次摆线面。 通过这样的变速齿轮，可以通过减小齿面的啮合点周围的区域的赫兹应力来提高抵抗接触压力的疲劳强度。 齿表面由自由曲面形成，其中在配合节点周围的区域中的最小曲率半径最大化，并且可以通过减小弯曲的齿根部分处的弯曲应力来增加抗弯曲疲劳强度 底部土地 此外，可以减少齿轮噪音。 底部区域由自由形状的表面形成，其中齿根周围区域中最小的曲率半径最大化。

公开(公告)号：US20130042711A1

公开(公告)日：2013-02-21

申请号：US13211852

申请日：2011-08-17

Applicant: Ioan Napau ,  Mircea Napau

Inventor： Ioan Napau ,  Mircea Napau

IPC: F16H1/18

CPC classification number: F16H1/145 ,  F16H55/082 ,  Y10T74/19665 ,  Y10T74/19949 ,  Y10T74/19958 ,  Y10T74/19972

Abstract: A double involute pinion-face gear drive system provides transmission of torque and speed, or direction of movement modification between non-intersecting shafts at right angles to one another. Specifically, the system includes three distinct types of gear drives, in which a double involute cylindrical pinion mounted on one of the two axes, engages a rotatable disk-shaped gear mounted on the second axis, disposed orthogonally offset at a prescribed center distance relative to the first axis. The teeth of the cylindrical pinion are curved in an abridged, normal or extended involute shape and may include an involute-shaped tooth depth profile in a plane passing through the tooth pitch point and orthogonal to the axis of the pinion. Likewise, the teeth of the face gear are curved in abridged, normal or extended involute shape in the lengthwise direction of the teeth and may include a straight line shaped tooth depth profile. These gear drive systems can be simultaneously bi-rotational and bi-directional. The novel gear drive system allows for a relatively wide range of low gear speed ratios, as low as 1:1 and as high as 7.5:1, in a compact arrangement.

Abstract translation: 双渐开线小齿轮齿轮传动系统提供扭矩和速度的传递，或在彼此成直角的非交叉轴之间的运动方向的变化。 特别地，该系统包括三种不同类型的齿轮传动装置，其中安装在两个轴线之一上的双渐开线圆柱形小齿轮与安装在第二轴线上的可旋转的盘形齿轮接合，该第二轴线相对于 第一轴。 圆柱形小齿轮的齿以缩短的，正常的或延伸的渐开线形状弯曲，并且可以在穿过齿节点并与小齿轮的轴线正交的平面中包括渐开线形的齿深剖面。 同样地，平面齿轮的齿在齿的长度方向上以节圆的，正常的或延伸的渐开线形状弯曲，并且可以包括直线形的齿形轮廓。 这些齿轮传动系统可以同时双向旋转和双向。 新颖的齿轮传动系统允许在紧凑的布置中具有低至1：1和高达7.5：1的较低范围的低速传动比。

公开(公告)号：US20120036955A1

公开(公告)日：2012-02-16

申请号：US12806304

申请日：2010-08-10

Applicant: Michael Gogola

Inventor： Michael Gogola

IPC: F16H55/08

CPC classification number: F16H55/08 ,  F16H55/26 ,  Y10T74/19972

Abstract: A gear for driving a linear member comprising a tooth tip, a tooth base, a contact face disposed between the tooth tip and the tooth base, the contact face having the shape, X=L sin(α−Θ) and Y=L cos(α−Θ), where tan(α)=(B/2+2πΘ/360) /R, L=(R{circumflex over (0)}2+(B/2+2πΘ/360/R){circumflex over (0)}2){circumflex over (0)}0.5, B=width of tooth base, R=pitch radius, Θ=relative angle of gear tooth to contacting member, a linear member comprising a plurality of holes, and the contact face engagable with the linear member through a hole.

Abstract translation: 一种用于驱动线性构件的齿轮，包括齿尖，齿底，设置在齿顶与齿座之间的接触面，具有X = L sin（α-θ）和Y = L cos （α-Θ），其中tan（α）=（B / 2 + 2＆pgr;Θ/ 360）/ R，L =（R（（0）} 2+（B / 2 + 2＆pgr;Θ/ 360 / （0）} 2）{回旋（0）} 0.5，B =齿根的宽度，R =节距半径，θ=齿轮与接触构件的相对角度，包括多个 并且通过孔与线性构件接合的接触面。

公开(公告)号：US08100028B2

公开(公告)日：2012-01-24

申请号：US11887993

申请日：2006-04-06

Applicant: Tsutomu Miyaoku ,  Jiro Kanehiro ,  Hidekazu Sasaki

Inventor： Tsutomu Miyaoku ,  Jiro Kanehiro ,  Hidekazu Sasaki

IPC: F16H55/00

CPC classification number: F16H55/08 ,  Y10T74/19972

Abstract: A Cornu's spiral is applied to a tooth profile of a gear. In accordance with the application of the gear, the Cornu's spiral may be modified two-dimensionally by some constant proportion. Since Cornu's spirals have similarity are similar, when a pressure angle is determined, the tooth profile can be standardized by a module, so that it is highly versatile.By replacing the tip of a tooth and the bottom of a tooth by another curve, such as an arc, the range of application can be increased. Since working is always by flank contact between a protrusion and a recess, contact surface stress is low. In addition, the radius of curvature of a dedendum is large. Therefore, tooth bending stress is low, and fatigue strength is high. Even if the number of teeth is small, an undercut is not produced. Even if there is no backlash, a smooth working is achieved, so that the tooth profile is suitable for devices requiring precise alignment.

Abstract translation: Cornu的螺旋应用于齿轮的齿廓。 根据齿轮的应用，Cornu的螺旋线可能会以一定的比例二维地修改。 由于Cornu的螺旋线具有相似性，因此当确定压力角时，可以通过模块对齿廓进行标准化，使其具有高度的通用性。 通过用另一曲线（例如弧）代替牙齿的尖端和牙齿的底部，可以增加应用范围。 由于工作总是通过突起和凹部之间的侧面接触，接触表面应力低。 另外，齿根的曲率半径很大。 因此，牙齿弯曲应力低，疲劳强度高。 即使齿数较少，也不会产生底切。 即使不存在间隙，也能实现平滑的加工，使得齿廓适合于需要精确对准的装置。