Nidec Sankyo Corporation

Satoru Yokoe

Takehiko Yazawa

Tetsuhiko Hara

Akihiro Ito

Hiroyuki Iwashita

A valve device includes: a shell provided with a chamber formed on an inner surface with an inlet and first and second outlets; a valve core provided with a main abutting portion, and first and second separation portions that are separated by the main abutting portion; and a driving portion driving the valve core to rotate, The valve core includes an auxiliary abutting portion. The auxiliary abutting portion is arranged that the area of the surface of the first separation portion opposite to the valve seat surface is closer to the area of the surface of the second separation portion opposite to the valve seat surface when the auxiliary abutting portion is not provided.

Valve device

A valve drive device comprising a valve body drive mechanism including a drive gear, a driven gear for turning the valve body, and a power transmission switching part provided with a protruded part of the drive gear and a turning restriction part turnably attached to the driven gear. The turning restriction part comprises a lever part urged with an urging force toward an outer side of the driven gear. The driven gear comprises a lever turning restriction part for restricting turning of the lever part and the lever part is structured to perform a contact operation with the protruded part and a separating operation separated from a contact position with the lever turning restriction part. The valve body drive mechanism further comprises a foreign matter entry restraining part which covers at least a part of a region formed between the lever part and the lever turning restriction part.

Valve drive device

A drive device with an abnormality detection mechanism may include a drive source; a drive member to which power of the drive source is transmitted; a driven member operably coupled to the drive member; and a detector structured to output a signal in response to the driven member being turned in the second direction around the second axial line. The driven member may be structured such that, in response to the drive member being turned in a first direction around a first axial line, the driven member is turned in a first direction around a second axial line; and, in response to transmission of the power from the drive member being disconnected, the driven member is turned in a second direction around the second axial line.

Drive device with abnormality detection mechanism and damper device

A valve drive device comprising a valve body drive mechanism including a drive gear, a driven gear for turning the valve body, and a power transmission switching part provided with a protruded part of the drive gear and a turning restriction part turnably attached to the driven gear. The turning restriction part includes a lever part which is provided with a first contact part structured to contact with the protruded part when the drive gear is turned to a first direction and a second contact part structured to contact with the protruded part when the drive gear is turned to an opposite direction to perform a separating operation from a contact position with a lever turning restriction part. The second contact part is formed in a shape having an interference avoiding part on a side of the first contact part.

Provided is a valve drive device including a power transmission switching unit capable of reducing noise and suppressing a tilting of a pivot shaft to perform smooth power transmission switching. In the valve drive device including a valve element drive mechanism, the valve element drive mechanism includes a motor, a driving gear, a driven gear, and a power transmission switching unit configured to switch between a power transmission state and a power non-transmission state. The power transmission switching unit includes at least one convex unit formed on the driving gear, and a rotation restriction unit that is pivotably mounted on the driven gear with respect to the driven gear and engageable with the at least one convex unit. The rotation restriction unit includes a pivot shaft, a lever unit, and a foot unit.

A rotation transmission mechanism may include a plurality of rotation transmission members having a drive wheel and a driven wheel, and an urging member which urges the driven wheel in a reverse direction to a rotational direction by power of the drive source. The drive wheel and the driven wheel are provided with engagement parts structured to transmit turning of the drive wheel to the driven wheel, the drive wheel is provided with a cam face forming part on which the engagement part of the driven wheel is slid at a rotational position where the engagement parts are not engaged with each other, and a brake member structured to generate a rotation load is disposed in a range on an upstream side of a power transmission path including the drive wheel with respect to the driven wheel in the power transmission path transmitting the power of the drive source.

Rotation transmission mechanism and damper device

To suppress variation, among rotors, in a relative position between the position of magnetic poles of a magnet and the rotation position (for example, the position of teeth of a pinion) of an integral rotation unit configured to rotate integrally with the rotor main body. A motor includes: a rotor including a magnet fixed to an outer periphery of a rotor main body, and an integral rotation unit assembled to the rotor main body; and a spindle configured to rotatably support the rotor. The magnet includes a positioning marker used when the rotor main body is fixed to the magnet, and the integral rotation unit and the rotor main body are configured to be capable of being assembled in a set relative arrangement.

Motor and valve drive device

A valve device is provided. In the valve device, a valve element is rotated about a support shaft, based on rotation of a valve element drive member to switch a through hole that communicates with an outlet formed in a valve seat to adjust a flow rate. The through hole opens in a bottom surface of a flow channel securing groove formed in the valve element. The flow channel securing groove has a long hole shape in which a width in a first direction being a moving direction of the valve element, is smaller than a width in a second direction orthogonal to the first direction. Thus, a region overlapping with the outlet is large as compared to a case where a perfect circular flow channel securing groove is formed.

There is provided a valve drive device including: a base including a fluid inlet, a fluid outlet, and a valve seat surface, at least one of the fluid inlet and the fluid outlet being opened at the valve seat surface; a cover configured to define a valve chamber; a valve element configured to open and close any one of the fluid inlet and the fluid outlet in the valve chamber; and a valve element driver configured to drive and rotate the valve element. The valve element driver includes: a motor; a drive gear configured to rotate together with a rotor of the motor; a driven gear configured to rotate, in a state of meshing with the drive gear, the valve element by rotation of the drive gear; and a power transmission switching unit.

A damper device may include a frame structured of a tube part and an opening part formed on an inner side of the tube part, a baffle which is disposed on the inner side of the tube part and is supported by the frame in a state that the baffle is capable of being turned with a first edge as a turning center, and a baffle drive mechanism structured to turn the baffle between a closing position where the opening part is closed and an open position where the opening part is opened. The baffle is formed with a cut-out part at least one position of an edge except the first edge.

Damper device

There is provided a motor including a rotor having a magnet fixed to the outer periphery of a rotor main body, a spindle for rotatably supporting the rotor via the rotor main body, a first bearing unit provided at one end side of the rotor in a longitudinal direction of the spindle, and a second bearing unit provided at the other end side of the rotor in the longitudinal direction of the spindle. The first bearing unit slidably contacts the spindle with a set clearance, and the second bearing unit includes an elastic bearing unit slidably contacting the spindle in a state of being elastically pressed against the spindle. When the first bearing unit is defined as a bearing unit at the one end side in the longitudinal direction of the spindle, the elastic bearing unit is configured to be located as a bearing unit at the other end side.

Provided is a valve drive device including a power transmission switching unit capable of reducing noise and improving positional accuracy to perform smooth power switching. In the valve drive device, a valve element drive mechanism includes a motor, a driving gear, a driven gear, and a power transmission switching unit configured to switch between a power transmission state and a power non-transmission state. The power transmission switching unit includes at least one convex unit formed on the driven gear, a rotation restriction unit that is pivotably mounted on the driven gear with respect to the driven gear and engageable with the at least one convex unit, and a lever pivoting restriction unit formed on the driven gear and configured to restrict the rotation restriction unit from pivoting. The rotation restriction unit includes a pivot shaft and a lever unit.

A switch mechanism may include a lever holding part which is provided in a case, a turnable lever provided with a shaft part turnably supported by the lever holding part and a first arm part and a second arm part protruded from the shaft part, an urging member structured to urge the turnable lever, and a switch whose state is switched by displacement of the turnable lever. The turnable lever is attached to the lever holding part in a state that the urging member is engaged between the first arm part and the second arm part, and the urging member is movable between an engaging position, where the urging member is engaged between the first arm part and the second arm part, and an engaging release position, where the urging member is engaged with the second arm part and is disengaged from the first arm part.

Switch mechanism, geared motor and damper device

A valve device is provided with a valve body driving member rotated by driving force from a drive source, and a valve body rotating in a circumferential direction integrally with the valve body driving member. Fitting parts fitted one another are formed in the lower surface of the valve body driving member and the upper surface of the valve body. The valve body has hole parts formed therethrough in the axial direction thereof. Groove parts that are flow channels linking from the outer peripheral surface of the valve body to the hole parts are formed in the upper surface of the valve body. The fitting parts and the groove parts on the valve body side have connecting parts that are portions where the fitting parts and the groove parts are formed continuously in the upper surface of the valve body without being separated by other elements constituting the valve body.

There is provided a valve drive device comprising: a motor including a stator with a core member and a drive coil, and a rotor provided with a drive magnet; a drive gear configured to rotate together with the rotor, a driven gear configured to rotate a valve element; and a power transmission switching unit configured to switch between a power transmission state where the drive gear and the driven gear mesh with each other and a power non-transmission state where a meshing state between the drive gear and the driven gear is released. The power transmission switching unit includes a plurality of convex units formed on the drive gear, and a rotation restriction unit provided in the driven gear and configured to engage with each of the convex units to perform switching of the power transmission.

Growing community of inventors

Nagano, Japan

Satoru Yokoe