# US 12,191,746 B2 · Split type motor

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- Number: US 12,191,746 B2
- Document ID: US12191746B2
- Status: Granted
- Kind: B2
- Application number: 17/993,903
- Filed: 2022-11-24
- Published: 2023-03-23
- Granted: 2025-01-07
- Earliest claimed: 2022-11-24
- Assignees: Dongguan Chi Drive Motors Co., Ltd
- Applicants: Dongguan Chi Drive Motors Co., Ltd
- Inventors: Changqing Gui; Tianyou Cao; Ping Li
- Web page: https://patentgrep.com/patent/US12191746B2

## CPC

- H02K 5/24: specially adapted for suppression or reduction of noise or vibrations
- H02K 5/06: Cast metal casings
- H02K 5/207: {with openings in the casing specially adapted for ambient air}
- H02K 7/083: {radially supporting the rotary shaft at both ends of the rotor (H02K7/086, H02K7/09 take precedence)}
- H02K 9/06: with fans or impellers driven by the machine shaft
- H02K 9/14: wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
- H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence)
- H02K 2205/09: Machines characterised by drain passages or by venting, breathing or pressure compensating means
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

The present disclosure discloses a split type motor, including an air channel and an armature module, wherein the armature module includes a housing, a stator assembly, a rotor assembly, and a printed circuit board (PCB); the housing is cylindrical; the rotor assembly includes a rotating shaft, a magnetic ring, a first bearing, and a second bearing; the housing is provided with a first bearing chamber and a second bearing chamber; an elastic component is arranged between the first bearing and the magnetic ring; the air channel includes an inner ring and an outer ring concentrically arranged; the inner ring encloses and forms a circular through cavity matched with the housing; a ventilation cavity is formed between the inner ring and the outer ring; and several flow guide plates are arranged in the ventilation cavity.

## Claims

### Claim 1

A split type motor, comprising an air channel and an armature module, wherein the armature module comprises a housing, and a stator assembly, a rotor assembly, and a printed circuit board (PCB) which are mounted in the housing; the cylindrical housing is provided with a mounting cavity inside; a gap communicated with the mounting cavity is arranged on the housing;
the rotor assembly comprises a rotating shaft, a magnetic ring arranged on the rotating shaft, a first bearing arranged at an upper end of the rotating shaft, and a second bearing arranged at a lower end of the rotating shaft; correspondingly, the housing is provided with a first bearing chamber matched with the first bearing, and a second bearing chamber matched with the second bearing; an elastic component is arranged between the first bearing and the magnetic ring;
the air channel comprises an inner ring and an outer ring concentrically arranged; the inner ring encloses and forms a circular through cavity matched with the housing; a ventilation cavity is formed between the inner ring and the outer ring; and several flow guide plates are arranged in the ventilation cavity.

### Claim 2 (depends on 1)

The split type motor according to claim 1, wherein the first bearing chamber is convexly arranged at an upper end of the housing; and the second bearing chamber is convexly arranged at a lower end of the housing.

### Claim 3 (depends on 2)

The split type motor according to claim 2, wherein the gap of the housing is arc-shaped, with an arc length greater than ⅓ of a perimeter of the housing and less than ⅔ of the perimeter of the housing.

### Claim 4 (depends on 1)

The split type motor according to claim 1, wherein the housing is made of aluminum alloy or zinc alloy or stainless steel.

### Claim 5 (depends on 4)

The split type motor according to claim 4, wherein a first glue accommodating groove is arranged on an inner side wall of the first bearing chamber and/or an outer side surface of the first bearing;
or, a first glue accommodating groove is arranged on an inner side wall of the second bearing chamber and/or an outer side surface of the second bearing.

### Claim 6 (depends on 5)

The split type motor according to claim 5, wherein the first glue accommodating groove is an annular groove.

### Claim 7 (depends on 4)

The split type motor according to claim 4, wherein the rotating shaft is provided with a second glue accommodating groove corresponding to where the bearings are mounted.

### Claim 8 (depends on 4)

The split type motor according to claim 4, wherein a lower end face of the inner ring of the air channel is located behind a lower end face of the outer ring, so that an accommodating position for accommodating blades is formed between the lower end face of the inner ring and the lower end face of the outer ring; blades are arranged at the lower end of the rotating shaft; and the blades are located at the accommodating position.

### Claim 9 (depends on 8)

The split type motor according to claim 8, wherein the blades are made of hardware or plastic.

### Claim 10 (depends on 9)

The split type motor according to claim 9, wherein the flow guide plates are curved at a certain slope; and inclination angles of the flow guide plates gradually decrease from bottom to top.