US 10,591,079 B2Granted

Electric actuator and manufacturing method for same

AssigneeDenso Corporation

InventorsTetsuji Yamanaka, Naoaki Kouno, Hiroki Shimada, Etsugo Yanagida

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Abstract

A housing includes an opening portion, which opens in one direction. At the time of assembling, the opening portion of the housing is placed to face an upper side. Then, a wave washer, an electric motor and screws for motor fixation are assembled from the upper side, and a first intermediate shaft and a second intermediate shaft are press-fitted, and a lower bearing, an output shaft, a second intermediate gear, a first intermediate gear are assembled. Thereafter, a cover is installed from the upper side to the housing. Next, an actuator lever is connected to a distal end part of the output shaft. As discussed above, the electric actuator can be assembled without inverting an orientation of the housing, and thereby productivity can be improved.

Claims24

Dependent claims

A manufacturing method of an electric actuator that includes:

a housing that has an opening portion, which opens in one direction;
an electric motor that is installed in the housing;
a speed reducing gear device of a parallel shaft type that is installed in the housing and reduces a rotational speed of a rotational force generated by the electric motor;
an output shaft that is installed in the housing and is driven by the rotational force, the rotational speed of which is reduced by the speed reducing gear device;
a cover that is installed to the housing, wherein the cover forms a space between the cover and the housing to receive the electric motor and the speed reducing gear device in the space, and a distal end part of the output shaft is exposed from the cover to an outside of the cover;
and
an actuator lever that is fixed to the distal end part of the output shaft, which is exposed to the outside of the cover, wherein the actuator lever drives a valve installed at a turbocharger, the manufacturing method of the electric actuator comprising:
an inside assembling step of assembling the electric motor, the speed reducing gear device and the output shaft into an inside of the opening portion from an upper side, while a side in an opening direction of the opening is defined as the upper side;
a cover assembling step of assembling the cover to the housing from the upper side after the inside assembling step;
and
a lever assembling step of fixing the actuator lever to the distal end part of the output shaft from the upper side after the cover assembling step.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/736,477Filed 7 Jun 2016
Priority: JP 2015-12296018 Jun 2015
Published: US 2018/0187791 A15 Jul 2018
Granted: 17 Mar 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

F16K 31/047
Using a motor: characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or…
F02B 37/186
Arrangements of bypass valves or actuators therefor: arrangements of actuators or linkage for bypass valves
F16H 19/001
Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion: for…
F16H 21/44
All movement being in, or parallel to, a single plane: for conveying or interconverting oscillating or reciprocating motions