ACTUATOR AND VEHICLE-DOOR OPENING/CLOSING ACTUATOR

• US 20180216391A1
• Filed: 07/27/2016
• Published: 08/02/2018
• Est. Priority Date: 07/31/2015
• Status: Active Grant

• Current Assignee: Mitsuba Corporation
• Original Assignee: Mitsuba Corporation
• Inventors: Takizawa, Takashi, Ikeda, Takayuki, Sekine, Yoshitaka, Ishikawa, Masazumi, Matsuzaki, Hiroshi, Taniguchi, Arata
• Granted Patent: US 10,900,270 B2
• Time in Patent Office: Days
• CPC Class Codes: B60J 5/10 arranged at the vehicle rear B60J5/04 takes precedence ; bonnets or lids B62D25/10; tail gates for pick-up trucks B62D33/0273; counterbalancing E05F; springs, e.g. pneumatic F16F
• CPC Class Codes: B60J 5/101 for non-load transporting vehicles, i.e. family cars including vans
• CPC Class Codes: E05F 15/622 using screw-and-nut mechanisms
• CPC Class Codes: E05Y 2201/70 Nuts
• CPC Class Codes: E05Y 2201/702 Spindles; Worms
• CPC Class Codes: E05Y 2201/72 Planetary gearing
• CPC Class Codes: E05Y 2201/726 Ring gears; Internal gears
• CPC Class Codes: E05Y 2600/634 Spacers
• CPC Class Codes: E05Y 2800/422 against vibration or noise
• CPC Class Codes: E05Y 2900/546 Tailgates
• CPC Class Codes: F16D 3/50 with the coupling parts connected by one or more intermediate members F16D3/16 takes precedence
• CPC Class Codes: F16F 15/08 with rubber springs grommet- or bushing-type resilient mountings F16F1/3732, F16F1/38; with springs made of rubber and metal arrangement of internal-combustion or jet-propulsion units B60K5/12; mounting of propulsion plants on vessels B63H21/30; mounting of vehicle drivers' cabs B62D33/0604
• CPC Class Codes: F16H 2025/2031 Actuator casings
• CPC Class Codes: F16H 2025/2075 Coaxial drive motors
• CPC Class Codes: F16H 2025/2087 using planetary gears
• CPC Class Codes: F16H 25/20 Screw mechanisms with automatic reversal F16H25/12
• CPC Class Codes: F16H 25/2056 Telescopic screws with at least three screw members in coaxial arrangement

Abstract

A tubular first housing, a motor part that is provided in the first housing, and an end damper and a damper member, one of which is provided on each of both ends in an axial direction of the motor part and absorbs vibration are provided, wherein the motor part is supported in a floating state by the first housing via the end damper and the damper member.

Claims

1. An actuator comprising

a tubular first housing that is attached to an attached body,

a motor that is provided in the first housing and that has a yoke to which a magnet is attached,

first and second damper members, one of which is provided on each of both ends in an axial direction of the motor and absorbs vibration,

a drive shaft that is driven and rotated by a rotary shaft of the motor, and

a speed reduction gear part that is provided between the rotary shaft of the motor and the drive shaft, that is housed in the yoke, that has an internal gear, and that reduces a speed of a rotation of the rotary shaft,

wherein the motor is supported in a floating state by the first housing via the first damper member and the second damper member,

the internal gear comprises

a plate part that has a disc shape,

a tubular part that has a tubular shape and that extends from an outer circumferential portion of the plate part toward an end of the yoke, and

a flange part of which the diameter is increased from the tubular part toward an outer circumference at an end on an opposite side of the plate part, and

the flange part is interposed between the second damper member and the yoke.

2. The actuator according to claim 1, further comprising

a tubular second housing that is provided so as to be capable of being projected/retracted with respect to the first housing,

a driven member that is fixed to the second housing and that is moved along an axial direction of the drive shaft in accordance with a rotation of the drive shaft to thereby allows the second housing to be projected/retracted with respect to the first housing, and

a coil spring that is provided in the first housing and the second housing and that provides a bias force of a direction in which the second housing is protruded with respect to the first housing.

3. The actuator according to claim 2, further comprising

a bearing holder that is provided on the first housing and that holds a bearing which rotatably supports the drive shaft,

wherein the second damper member is provided between the speed reduction gear part and the bearing holder.

4. The actuator according to claim 3,

wherein a first protrusion that protrudes toward the second damper member is formed on a gear case of the speed reduction gear part,

a second protrusion that protrudes toward the gear case is formed on the bearing holder, and

an insertion part in which the first protrusion and the second protrusion are capable of being inserted is formed on the second damper member.

5. A vehicle-door opening/closing actuator that is an actuator in use for opening/closing a vehicle door, in which an actuator according to claim 4 is used in order to open/close a door that is provided to be openable/closable with respect to an opening,

wherein the first housing is coupled to any one of the opening and the door, and

the second housing is coupled to the other of the opening and the door.