# US 12,215,702 B2 · Rotation driving mechanism of air supply apparatus, air supply apparatus, and household appliance > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,215,702 B2 - Document ID: US12215702B2 - Status: Granted - Kind: B2 - Application number: 18/494,740 - Filed: 2023-10-25 - Published: 2024-02-15 - Granted: 2025-02-04 - Earliest claimed: 2020-04-02 - Assignees: Gd Midea Environment Appliances Mfg Co., Ltd.; Midea Group Co., Ltd. - Applicants: Gd Midea Environment Appliances Mfg Co., Ltd.; Midea Group Co., Ltd. - Inventors: Shiqiang Cui - Web page: https://patentgrep.com/patent/US12215702B2 ## CPC - F04D 25/02: Units comprising pumps and their driving means - F04D 25/105: {by changing rotor axis direction, e.g. oscillating fans (interconnecting rotary motion and oscillating motion F16H)} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract A rotation driving mechanism of an air supply apparatus, an air supply apparatus, and a household appliance. The rotation driving mechanism of the air supply apparatus comprises: a fixed bracket; a rotary bracket, and the rotary bracket is sleeved on the fixed bracket and may rotate with respect to the fixed bracket; and a driving member, and the driving member is provided on the fixed bracket and used for driving the rotary bracket to rotate. Therefore, compared with the prior art, by means of the coordination of the fixed bracket, the rotary bracket, and the driving member, the size of the rotation driving mechanism can be reduced; after the rotation driving mechanism is mounted on the air supply apparatus, the air supply apparatus can have a better appearance. ## Claims ### Claim 1 An air supply apparatus, comprising: a first fixed seat; a second fixed seat, the second fixed seat being connected to a handpiece of the air supply apparatus; and a rotation driving mechanism, the rotation driving mechanism having a fixed bracket and a rotary bracket, the fixed bracket being fixedly connected to the first fixed seat, and the rotary bracket being fixedly connected to the second fixed seat, wherein the rotary bracket is sleeved on the fixed bracket, and the rotation driving mechanism further has a driving assembly, and the driving assembly is adapted to drive the rotary bracket to rotate around a pitch axis, wherein the driving assembly comprises: a driving member and a first transmission member, wherein the first transmission member is connected to the driving member, and the rotary bracket is provided with a second transmission member drivingly engaging with the first transmission member; wherein the rotation driving mechanism further comprises: a support bearing, wherein the fixed bracket comprises a body portion, the body portion defines a mounting groove, an outer wall surface of a bottom wall of the mounting groove is provided with a mounting post, an inner ring of the support bearing is sleeved on the mounting post, and an outer ring of the support bearing is connected to the rotary bracket. ### Claim 2 (depends on 1) The air supply apparatus according to claim 1, wherein the pitch axis is parallel to a horizontal plane. ### Claim 3 (depends on 1) The air supply apparatus according to claim 1, wherein the rotary bracket defines a through-hole, the through-hole passing through the rotary bracket in a thickness direction of the rotary bracket, and the through-hole being sleeved on an outer side of the fixed bracket and the support bearing. ### Claim 4 (depends on 3) The air supply apparatus according to claim 3, wherein an inner wall surface of the through-hole is provided with an annular boss and the inner wall surface of the annular boss is provided with the second transmission member. ### Claim 5 (depends on 4) The air supply apparatus according to claim 4, wherein the inner wall surface of the through-hole is provided with a stopper boss, the stopper boss being located between the annular boss and the support bearing, and the stopper boss abutting the support bearing. ### Claim 6 (depends on 1) The air supply apparatus according to claim 1, wherein the rotation driving mechanism further comprises: a snap spring, wherein the snap spring is sleeved on the mounting post and located at one end of the support bearing away from the fixed bracket. ### Claim 7 (depends on 1) The air supply apparatus according to claim 1, wherein the rotation driving mechanism further comprises: a bearing inner ring stop, wherein the bearing inner ring stop is provided on the fixed bracket and is located at one end of the support bearing away from the fixed bracket. ### Claim 8 (depends on 1) The air supply apparatus according to claim 1, wherein the rotation driving mechanism further comprises: a bearing outer ring stop, the bearing outer ring stop being provided on the rotary bracket and located at one end of the support bearing away from the fixed bracket. ### Claim 9 (depends on 1) The air supply apparatus according to claim 1, wherein the rotation driving mechanism further comprises: an annular friction plate, the body portion being sleeved on an outer side of the friction plate, and the friction plate being sleeved on the outer side of the rotary bracket. ### Claim 10 (depends on 1) The air supply apparatus according to claim 1, wherein a side wall of the mounting groove has a first through hole, the first transmission member being located in the mounting groove, and the first transmission member drivingly mating with the second transmission member through the first through hole. ### Claim 11 (depends on 1) The air supply apparatus according to claim 1, wherein the first transmission member is a gear and the second transmission member is a rack. ### Claim 12 (depends on 1) The air supply apparatus according to claim 1, wherein the rotation driving mechanism further comprises: a damper, a side wall of the mounting groove having a second through hole, the damper being provided in the mounting groove, and the damper drivingly mating with the second transmission member by passing through the second through hole. ### Claim 13 (depends on 1) The air supply apparatus according to claim 1, wherein the rotation driving mechanism further comprises: a Hall assembly, wherein the Hall assembly comprises a Hall plate and a magnet, and one of the Hall plate and the magnet is provided on the fixed bracket, and the other is provided on the rotary bracket. ### Claim 14 (depends on 1) The air supply apparatus according to claim 1, wherein a depression angle of the rotary bracket is A, meeting a relational expression: −10°≤A≤0°; an elevation angle of the rotary bracket is B, meeting a relational expression: 0°≤B≤90°. ### Claim 15 (depends on 1) The air supply apparatus according to claim 1, further comprising: a damping mechanism, the damping mechanism being provided on the fixed bracket and being pivotably connected to the rotary bracket. ### Claim 16 (depends on 15) The air supply apparatus according to claim 15, wherein the rotary bracket has a damping mechanism connection structure, the damping mechanism connection structure being sleeved on the damping mechanism. ### Claim 17 (depends on 16) The air supply apparatus according to claim 16, wherein the damping mechanism connection structure has a first routing channel and the damping mechanism has a second routing channel communicating with the first routing channel.