JP2023035018A5

JP2023035018A5 -

Info

Publication number: JP2023035018A5
Application number: JP2021141589A
Authority: JP
Filing date: 2021-08-31
Publication date: 2023-09-04
Anticipated expiration: 2041-08-31

Description

また、キャリアサブアッセンブリと、位置規制部品としてのサンギヤおよび第２リングギヤまたは回転部との間のトルク損失を低減できるため、減速機全体の効率を向上できる。
プラネタリギヤは、筒状のプラネタリギヤ本体（３２２）、プラネタリギヤ本体の軸方向の一方の端面から筒状に突出する第１凸部（３２３）、および、プラネタリギヤ本体の軸方向の他方の端面から筒状に突出する第２凸部（３２４）を有する。第１プラネタリギヤ環状面は、第１凸部の端面に形成されている。第２プラネタリギヤ環状面は、第２凸部の端面に形成されている。 In addition, since the torque loss between the carrier sub-assembly and the sun gear and second ring gear or rotating portion as position regulating parts can be reduced, the efficiency of the entire speed reducer can be improved.
The planetary gear includes a cylindrical planetary gear body (322), a first projection (323) cylindrically protruding from one end face of the planetary gear body in the axial direction, and a cylindrical shape from the other end face of the planetary gear body in the axial direction. It has a protruding second protrusion (324). The first planetary gear annular surface is formed on the end surface of the first projection. The second planetary gear annular surface is formed on the end surface of the second protrusion.

Claims

a housing (12);
an electric motor (20) provided in the housing and capable of outputting torque when energized;
a speed reducer (30) capable of reducing and outputting torque from the electric motor;
A rotating part (40) that rotates by torque from the speed reducer,
The speed reducer is
a sun gear (31) to which torque from the electric motor is input;
a plurality of planetary gears (32) that can revolve in the circumferential direction of the sun gear while meshing with the sun gear and rotating;
a pin (335) provided at the center of rotation of the planetary gear;
a planetary gear bearing (36) provided between the planetary gear and the pin;
an annular carrier (33) that rotatably supports the planetary gear by supporting one end of the pin and is rotatable relative to the sun gear;
an annular first ring gear (34) meshable with the planetary gear; and
An annular second ring gear (35) that can mesh with the planetary gear, is formed to have a number of teeth different from that of the first ring gear, and outputs torque to the rotating part;
said planetary gear, said pin, said planetary gear bearing and said carrier form a carrier subassembly (330);
At least one of the plurality of planetary gears has a first planetary gear annular surface (901) that is an annular surface at one end in the axial direction and a second planetary gear annular surface (902) that is an annular surface at the other end in the axial direction. have
The sun gear has a sun gear annular surface (911), a part of which is an annular surface facing a part of the first planetary gear annular surface so as to be in contact and slidable,
The second ring gear or the rotating part has an output-side annular surface (921), a part of which is an annular surface facing a part of the second planetary gear annular surface so as to be able to contact and slide,
The carrier subassembly is axially relative to the housing when the first planetary gear annular surface abuts the sun gear annular surface or when the second planetary gear annular surface abuts the output side annular surface. movement is restricted
The planetary gear includes a cylindrical planetary gear body (322), a first convex portion (323) projecting cylindrically from one end face of the planetary gear body in the axial direction, and a projection from the other end face of the planetary gear body in the axial direction. Having a second convex portion (324) protruding in a cylindrical shape,
The first planetary gear annular surface is formed on an end surface of the first projection,
A said 2nd planetary-gear annular surface is a geared motor formed in the end surface of a said 2nd convex part .

outer diameters of the first planetary gear annular surface and the second planetary gear annular surface are set smaller than diameters of root circles of the planetary gears;
The outer diameter of the sun gear annular surface is set to be equal to or greater than the diameter of the addendum circle of the sun gear,
2. A geared motor according to claim 1, wherein the inner diameter of said output-side annular surface is set equal to or less than the diameter of the addendum circle of said second ring gear.

5. The geared motor according to claim 1, wherein the carrier is provided only on the rotating portion side with respect to the axial center of the planetary gear.