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公开(公告)号：US20240352996A1
公开(公告)日：2024-10-24
申请号：US18682817
申请日：2022-04-26
申请人： TIANJIN UNIVERSITY
发明人： Yuhu YANG , Ran XIE , Guocheng ZHOU , Zhaoguang SHEN
CPC分类号： F16H49/001 , F16H55/0833 , F16H2049/003
摘要： The present disclosure discloses a harmonic reducer with conjugate cycloidal profiles, including a circular spline, a flexspline, a wave generator and a flexible bearing. A profile of the circular spline and a profile of the flexspline are conjugate cycloidal profiles. The profile of the circular spline and the profile of the flexspline are formed by hypocycloids and epicycloids formed by two rolling circles around a pitch circle of the circular spline and a pitch circle of the flexspline under an engaging state respectively. A sum of radii of the first rolling circle and the second rolling circle is equal to a difference between radii of the pitch circle of the circular spline and the pitch circle of the flexspline under the engaging state. The wave generator is a biarc cam wave generator, a cam curve is an arc within an angle of contact in the long axis direction.
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公开(公告)号：US12013022B2
公开(公告)日：2024-06-18
申请号：US17740558
申请日：2022-05-10
IPC分类号： F16H55/17 , B22F3/16 , B22F3/24 , B22F5/08 , C22C38/44 , C23C8/26 , C23C8/32 , C23C8/38 , F16H55/06 , F16H55/08
CPC分类号： F16H55/17 , B22F3/16 , B22F3/24 , B22F5/08 , C22C38/44 , C23C8/26 , C23C8/32 , C23C8/38 , F16H55/06 , F16H55/08 , B22F2301/35 , F16H2055/176
摘要： A method for producing a sintered component, in particular an annular sintered component, with a toothing, having teeth with tooth roots, tooth tips and tooth flanks, includes the steps of pressing a powder to form a green compact, sintering the green compact, and hardening the sintered component, wherein after sintering, the tooth flanks and possibly the tooth tips are post-compacted and subsequently undergo post-processing by machining, and wherein a transition region between the tooth flanks and the tooth roots has an undercut design, and post-compaction of the tooth flanks is carried out only up to this transition region.
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公开(公告)号：US20240167556A1
公开(公告)日：2024-05-23
申请号：US18271323
申请日：2021-01-15
发明人： Shiryu KATOH , Shinya MATSUOKA
摘要： In a gear pair in which a first gear and a second gear having a larger number of teeth than the first gear share a meshing line (L) of teeth that mesh with each other, at least a part of the meshing line (L) includes a region where a pressure angle (a) is not constant, and the pressure angle (α) weakly increases in a section of the meshing line (L) from a pitch point (Pp) to an end point (Pe1) on a tooth-root side of the first gear (G1). This allows both desired properties (for example, strength) and smooth meshing to be achieved, and also allows effective increase in strength of the tooth-root side of the gear having the small number of the teeth (that is, the first gear) subject to a large load and susceptible to damages on the tooth-root side.
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公开(公告)号：US20240159306A1
公开(公告)日：2024-05-16
申请号：US18054598
申请日：2022-11-11
CPC分类号： F16H55/0886 , F16H55/17
摘要： A multi-slot gear for a powertrain of a vehicle includes an inner ring, an outer ring having gear teeth disposed on a periphery of the outer ring, a web disposed between the inner ring and the outer ring, and a plurality of slots disposed within the web. Each of the plurality of slots includes a slot angle and each of the plurality of slots is separated from one another by a space angle. The ratio of the slot angle to the space angle is greater than two.
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公开(公告)号：US20240159305A1
公开(公告)日：2024-05-16
申请号：US18549650
申请日：2021-06-01
发明人： Yuya MURAYAMA
CPC分类号： F16H49/001 , F16H55/0833
摘要： According to a tooth profile designing method for a strain wave gear device, a first curve from a point A (φ=0) to a point B (φ=τ/2) in a moving locus of external teeth with respect to internal teeth is extracted. A similarity curve is obtained by multiplying the first curve by (1−λ) using the point B as a center of similarity, and a second curve is obtained by rotating the similarity curve by 180° about a midpoint C between the point A and the point B as a center of similarity. A third curve is obtained by multiplying only the x-coordinate of the second curve by α (α 1). An addendum tooth profile of the external teeth is defined using the third curve or the fourth curve.
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公开(公告)号：US20240125374A1
公开(公告)日：2024-04-18
申请号：US18016805
申请日：2022-05-11
发明人： Siying LING , Ming LING , Heng ZHANG , Fengtao WANG
CPC分类号： F16H1/16 , F16H55/0806 , F16H55/22 , F16H2057/0087
摘要： The present invention belongs to the field of mechanical transmission technology, and proposes a non-orthogonal elliptical toroidal worm gear pair, including an involute cylindrical gear and an elliptical toroidal worm formed by a primary envelope of the involute cylindrical gear; both adopt spatial non-orthogonal transmission, and the shaft angle satisfies the self-locking condition and the restriction condition of minimum tooth top width; the toroidal generatrix of the elliptical toroidal worm is elliptical, which can increase the number of meshing teeth and the total length of instantaneous contact line. A non-orthogonal elliptical toroidal worm gear pair proposed in this invention has the characteristics of toroidal worm drive and can realize the whole facewidth of the gear to participate in the meshing drive. It can be used in the fields of precision continuous indexing transmission, continuous lapping of cylindrical gear tooth flank, and has good popularization application value and industrialization prospect.
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公开(公告)号：US11959539B2
公开(公告)日：2024-04-16
申请号：US18262378
申请日：2021-11-18
发明人： Satoru Fujita , Kazuo Ishizuka , Tomoki Shirasawa , Ryo Kamiyama
CPC分类号： F16H55/0833 , F16H49/001 , F16H55/06
摘要： It is included an internal gear (2), an external gear (3) having flexibility, and a wave generator (4) that forms a meshing part (P) with the internal gear (2) in the external gear (3) and moves the meshing part (P) in a circumferential direction of the internal gear (2). The wave generator (4) is configured such that the meshing part (P) is formed at three or more positions in a circumferential direction of the external gear (3). A value (DpF/ZF) obtained by dividing a working pitch diameter DpF of the external gear (3) by the number of teeth ZF is greater than a value (DpR/ZR) obtained by dividing a working pitch diameter DpR of the internal gear (2) by the number of teeth ZR.
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公开(公告)号：US20240052921A1
公开(公告)日：2024-02-15
申请号：US18165590
申请日：2023-02-07
CPC分类号： F16H55/088 , F16H57/02 , F16H2057/02039
摘要： A gearbox assembly includes a first gear and a second gear. The first gear includes a plurality of first gear teeth. The second gear includes a plurality of second gear teeth. The plurality of first gear teeth and the plurality of second gear teeth mesh with each other as the first gear and the second gear rotate. A profile shape of at least one first gear tooth of the first gear is characterized by a total profile modification between 66 micrometers and 120 micrometers.
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公开(公告)号：US11894753B2
公开(公告)日：2024-02-06
申请号：US16982052
申请日：2019-04-03
申请人： MITSUBA Corporation
摘要： A deceleration mechanism is provided with first and second gears, a first tooth part arranged in the first gear and extending spirally in an axial direction of the first gear, an engagement projected part arranged on the first tooth part, second tooth parts arranged on the second gear, and an engagement recessed part arranged between the adjacent second tooth parts. The engagement projected part is formed in an arc shape in a direction orthogonal to the axial direction of the first gear and has a curvature center eccentric from a rotation center of the first gear. The second tooth parts are inclined with respect to the axial direction of the first gear and arranged in a circumferential direction of the second gear. The engagement projected part is formed in an arc-shape in a direction orthogonal to the axial direction of the first gear and engaged with the engagement projected part.
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公开(公告)号：US11867273B2
公开(公告)日：2024-01-09
申请号：US17940320
申请日：2022-09-08
摘要： A helical sector gear having a body and a gear segment having a plurality of helical teeth. The gear segment has a toothed sector, on which all of the helical teeth are formed, and spacing segments on the opposite circumferential ends of the toothed sector. Each of the spacing segments has a circumferential surface, which is longer than a pitch of the helical teeth, and a radial surface that is formed in a helical manner that conforms to the helix angle of helical teeth. A die set for forming the helical sector gear and a related method are also provided.
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