Sumitomo Heavy Industries, Ltd.

Matsushita Electric Industrial Co., Ltd.

Sumitomo Heavy Industries Co., Ltd.

Mitsuhiro Tamura

Akira Yamamoto

Masahiro Watanabe

Koji Moritani

Toshiaki Matoba

Masayuki Ishizuka

Takuma Iida

Hiroki Takeshima

Takashi Haga

Hidetaka Yamashita

Shunsuke Yasui

Yoshitaka Shizu

Kenji Shirouzu

Hiroki Awashima

A gear device that is incorporated in a food machine which is used in a process of handling food, includes a first gear, a second gear that meshes with the first gear, grease that is accommodated in an internal space in which a meshing portion between the first gear and the second gear is present, and a gap portion that allows the internal space to communicate with an external space, in which the first gear is made of fiber-reinforced resin, an accommodation amount of the grease is 1% or more and 30% or less of capacity of a grease accommodation space that is configured by a part of the internal space and accommodates the grease, and the grease is grease that does not correspond to food grease.

Gear device

A speed reducer includes an output member to which a driven member is connected, in which the output member is formed of resin and includes a plurality of first screw holes into which fine-thread screws for connection of the driven member are screwed and each of which includes a bottom, and the output member is provided with a weight reduction portion between the plurality of first screw holes in a circumferential direction.

Speed reducer

A gear device includes a resin gear that is formed of a first resin material, and a connected member that is formed of a second resin material and that is connected to the resin gear, in which the first resin material is a fiber-reinforced resin obtained by filling a first base material resin with first reinforcement fibers, the second resin material is a fiber-reinforced resin obtained by filling a second base material resin with second reinforcement fibers, and a fiber content ratio of the second reinforcement fibers in the second resin material is higher than a fiber content ratio of the first reinforcement fibers in the first resin material.

A robot joint structure includes a first robot member, a second robot member, and a speed reducer incorporated in a joint portion that connects the first robot member and the second robot member to each other. The speed reducer includes an external gear, an internal gear that meshes with the external gear, and a fixing member that is provided so as to be non-rotatable relative to the internal gear and is fixed to the first robot member. The fixing member is fixed to the first robot member by bringing an inner peripheral surface of the first robot member and an outer peripheral surface of the fixing member into pressure contact with each other by fastening using a first fastening member. At least a part of an axial range of the first fastening member does not overlap internal teeth of the internal gear when viewed in a radial direction.

Robot joint structure

Provided is a method for producing a gear including an intermediate product forming process of solidifying a fluid material to form a gear intermediate product, and a tooth forming process of cutting the gear intermediate product to form teeth.

Method for producing gear, gear, and bending meshing type gear device

A reduction gear includes a reduction mechanism and a component which constitutes the reduction gear and in which a cavity portion is provided. The reduction mechanism is not provided in the cavity portion. The component includes a reinforcement structure which is provided to partially fill an inside of the cavity portion and forms a void, which is filled with air or fluid, in the cavity portion. The cavity portion includes only one opening with respect to a space in which the reduction mechanism is accommodated or with respect to an external space, or the cavity portion is provided so as to form a closed space inside the component.

Reduction gear

There is provided a technique capable of increasing support rigidity of a bearing when a support member expands due to moisture absorption. A power transmission device includes: a rotary shaft; a support member disposed outside the rotary shaft in a radial direction; a bearing disposed between the rotary shaft and the support member; and a fitting member fitted to an outer peripheral portion of the support member. The fitting member is made of a material having lower hygroscopicity than hygroscopicity of a material of the support member.

Power transmission device and method for manufacturing power transmission device

A gear device includes an external gear, and an internal gear that meshes with the external gear. The external gear is formed of metal. The internal gear is formed of a carbon fiber reinforced resin.

A gear device includes a first gear, and a second gear meshing with the first gear. At least the first gear is made of a resin. The gear device further includes a connection member connected to an external member, a path member disposed in a path leading to the first gear and the connection member, and other members that are members other than the first gear, the second gear, the connection member, and the path member, and are made of a resin. The first gear, the connection member, and the path member are made of a resin having a higher thermal conductivity than a thermal conductivity of the other members.

A robot includes a first joint and a second joint positioned on a base end side from the first joint. A first speed reducer is incorporated in the first joint. A second speed reducer is incorporated in the second joint. A volume proportion of a resin occupying a constituent member of the first speed reducer is larger than a volume proportion of a resin occupying a constituent member of the second speed reducer.

Robot

An eccentric oscillation type speed reducer includes: an external gear which meshes with the internal gear; an eccentric body shaft which oscillates the external gear; and an input shaft bearing which supports the eccentric body shaft. The casing and the external gear are made of resin, and the input shaft bearing is made of metal.

Eccentric oscillation type speed reducer

A bending meshing type gear device includes a wave generator, an external gear which is bent and deformed by the wave generator, and internal gears which meshes with the external gear. One of the external gear and the internal gears is formed of a resin, and the other of the external gear and the internal gears is formed of a high thermal conductivity material having thermal conductivity higher than that of the resin. The gear device further include an abutment member which is connected to the internal gear and abuts the external gear, the internal gear is formed of the resin, the external gear is formed of the high thermal conductivity material, and the abutment member is formed of a high thermal conductivity material having thermal conductivity higher than that of the resin.

Bending meshing type gear device

A gear device includes an internal gear and an external gear that meshes with the internal gear, in which the internal gear is made of a resin, the external gear is made of a material having a smaller linear expansion coefficient than the resin, and PCDs of the internal gear and the external gear before use of the gear device are set such that lost motion becomes 0 min or more and 15 min or less due to a difference in a thermal expansion amount between the internal gear and the external gear at a time of use of the gear device.

Gear device and manufacturing method for gear device

A reduction gear includes an external gear, an internal gear which meshes with the external gear, a first member which synchronizes with a rotation of the external gear, a second member which synchronizes with a rotation of the internal gear, and a main bearing which is disposed between the first member and the second member, in which one of the first member and the second member is connected to a driven member and the other is fixed to an external member, and the first member, the second member, and the main bearing are formed of a material having a larger Young's modulus and larger specific gravity than those of a material constituting the external gear and the internal gear.

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Kanagawa, Japan

Mitsuhiro Tamura