# US 12,007,017 B1 · Planetary gear device and actuator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,007,017 B1 - Document ID: US12007017B1 - Status: Granted - Kind: B1 - Application number: 18/084,598 - Filed: 2022-12-20 - Published: 2024-06-20 - Granted: 2024-06-11 - Earliest claimed: 2022-12-20 - Assignees: Enplas Corporation - Applicants: Enplas Corporation - Inventors: Koki Hisai - Web page: https://patentgrep.com/patent/US12007017B1 ## CPC - F16H 57/082: {Planet carriers} - F16H 57/0025: {with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods} - F16H 2200/2005: with one sets of orbital gears - F16H: GEARING ## Abstract A planetary gear device include: a carrier portion including a first facing portion and a second facing portion that face with each other; a planetary portion disposed between the first facing portion and the second facing portion; and a first supporting portion and a second supporting portion formed on the first facing portion and the second facing portion or the planetary portion, respectively, and cooperating with each other so as to support the planetary portion rotatably on the second facing portion. ## Claims ### Claim 1 A planetary gear device, comprising: a carrier portion including a first facing portion and a second facing portion that face with each other; a planetary portion disposed between the first facing portion and the second facing portion; and a first supporting portion and a second supporting portion formed on the first facing portion and the second facing portion, respectively, and cooperating with each other so as to support the planetary portion rotatably with respect to the second facing portion, wherein a tip end of the first supporting portion and a tip end of the second supporting portion are disposed to face each other with a gap therebetween. ### Claim 2 (depends on 1) The planetary gear device according to claim 1, wherein the gap is formed at a center between the first facing portion and the second facing portion in an axial direction. ### Claim 3 (depends on 1) The planetary gear device according to claim 1, wherein the first supporting portion and the second supporting portion are formed integrally with the first facing portion and the second facing portion, respectively. ### Claim 4 (depends on 1) The planetary gear device according to claim 1, wherein the first supporting portion and the second supporting portion are formed separately from the first facing portion and the second facing portion, respectively, and are fixed to the first facing portion and the second facing portion, respectively. ### Claim 5 (depends on 1) The planetary gear device according to claim 1, wherein the first supporting portion and the second supporting portion are each formed of a shaft portion or a protruding portion, the first supporting portion and the second supporting portion being inserted into the planetary portion, and the planetary portion includes a first planetary-side receiving portion and a second planetary-side receiving portion that slidably contact with the first supporting portion and the second supporting portion. ### Claim 6 (depends on 5) The planetary gear device according to claim 5, wherein the first planetary-side receiving portion and the second planetary-side receiving portion are each formed of a through hole or an inner surface of a recessed portion formed in the planetary portion, the through hole formed in the planetary portion. ### Claim 7 (depends on 5) The planetary gear device according to claim 5, wherein the first planetary-side receiving portion and the second planetary-side receiving portion are each formed of a through hole formed in the planetary portion or a ring-shaped conical surface or a protruding portion formed on an edge of a recessed portion. ### Claim 8 (depends on 5) The planetary gear device according to claim 5, wherein the first supporting portion includes a guide shaft portion whose outer diameter is smaller than an inner diameter of the planetary portion, and the guide shaft portion functions as a guide of the planetary portion when the planetary portion is assembled to the first facing portion. ### Claim 9 (depends on 5) The planetary gear device according to claim 5, wherein the first planetary-side receiving portion and the second planetary-side receiving portion are each a tapered surface, and outer peripheral surfaces of the first supporting portion and the second supporting portion are tapered surfaces fitting to the first planetary-side receiving portion and the second planetary-side receiving portion, respectively. ### Claim 10 (depends on 8) The planetary gear device according to claim 8, wherein a length of the first supporting portion in an axial direction is larger than a half of a distance between the first facing portion and the second facing portion, and a length of the second supporting portion in the axial direction is smaller than the half. ### Claim 11 (depends on 1) An actuator comprising: the planetary gear device according to claim 1; and a motor connected to the planetary gear device and configured to drive the planetary gear device.