Fan device, motor and liquid pump

Patent metadata

Field	Value
Publication number	US-10883520-B2
Application number	US-201715452273-A
Country	US
Kind code	B2
Filing date	Mar 7, 2017
Priority date	Mar 7, 2016
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

A fan device includes a driving device, a fan wheel, and a locking fastener. The driving device includes a shaft. The fan wheel defines a shaft hole to receive the shaft. The locking fastener has a thermal expansion coefficient same as a thermal expansion coefficient of the shaft.

First claim

The invention claimed is:

1. A fan device, comprising:
a driving device having a shaft;
a fan wheel defining a shaft hole to receive the shaft;
a locking fastener to lock the fan wheel on the shaft; and wherein a thermal expansion coefficient of the locking fastener is the same as a thermal expansion coefficient of the shaft,
wherein the fan wheel further comprises a fixing member and an outer ring part, the fixing member is disposed at an axis position of the outer ring part and is convexly formed from the outer ring part, and the shaft hole is defined in the fixing member along an axis of the outer ring part, the locking fastener penetrates through the shaft hole and locks the fixing member to the shaft; wherein the locking fastener is of a hollow cylindrical nail body, a nail head is arranged in one end of the locking fastener and a plurality of leaflets divided by a gap arranged in the other end of the locking fastener, and the nail head resists against one end of the fixing member; and wherein a plurality of clamping grooves are formed in an end wall at one end of the fixing member, the other end of the locking fastener is provided with bent portions, and the other end of the fixing member away from the clamping grooves resists against one corresponding nail head and the bent portions are clamped in the clamping grooves.

2. The fan device according to claim 1 , wherein the fixing member comprises a clamping portion and a step portion; and the plurality of clamping grooves are formed in a peripheral wall of the clamping portion, one end of the fixing member resists the nail head and the bent portions are clamped in the clamping grooves.

3. The fan device according to claim 2 , wherein the peripheral wall of the clamping portion is provided with a plurality of clamping blocks in a radial direction, and the clamping blocks and the clamping grooves are provided disposed at intervals.

4. The fan device according to claim 3 , further comprising a retaining ring, wherein one end face of the retaining ring circularly defines a plurality of first grooves, and the a tail end of each bent portion penetrates through the corresponding clamping groove and then is clamped in the first groove.

5. The fan device according to claim 4 , wherein a plurality of second grooves are uniformly and circularly defined in an inner arc surface of the retaining ring is uniformly and circularly provided with a plurality of second grooves, and each clamping block is clamped into one of the second grooves.

6. The fan device according to claim 3 , wherein one side of the step portion is provided with a plurality of projection portions are disposed in one side of the step portion, a plurality of clamping grooves are disposed in one side of the retaining ring is provided with a plurality of clamping grooves, and each projection portion is clamped in one of the clamping grooves.

7. The fan device according to claim 1 , wherein a plurality of ribs are circularly arranged at one end face of the fixing member against the bent portions is circularly provided with a plurality of ribs at intervals, and the nail heads are pressed against the ribs.

8. The motor fan device according to claim 2 , wherein a plurality of blades are disposed at one side of the outer ring part, close to the clamping portion, is circularly provided with a plurality of blades at intervals.

9. A motor, comprising:
a housing;
a stator disposed in the housing;
a rotor disposed in the housing;
an end cap covered at one end of the housing; and
a fan device fixed by a shaft of the rotor, wherein the fan device comprises a fan wheel defining a shaft hole to receive the shaft; and a locking fastener to lock the fan wheel on the shaft; wherein a thermal expansion coefficient of the locking fastener is the same as a thermal expansion coefficient of the shaft, the fan wheel further comprises a fixing member and an outer ring part, the fixing member is disposed at an axis position of the outer ring part and is convexly formed from the outer ring part, and the shaft hole penetrates through the fixing member along an axis; a plurality of clamping grooves are formed in an end wall at one end of the fixing member, the locking fastener is of a hollow cylindrical nail body, a nail head is arranged in one end of the locking fastener, the other end of the locking fastener is provided with bent portions, the other end of the fixing member away from the clamping grooves resists against the nail head and the bent portions are clamped in the clamping grooves.

10. The motor according to claim 9 , wherein the fixing member comprises a clamping portion and a step portion; and the plurality of clamping grooves are formed in a peripheral wall of the clamping portion, one end of the fixing member resists the nail head and the bent portions are clamped in the clamping grooves.

11. The motor according to claim 10 , wherein the peripheral wall of the clamping portion is provided with a plurality of clamping blocks in a radial direction, and the clamping blocks and the clamping grooves are disposed at intervals.

12. The motor according to claim 11 , wherein the fan device further comprises a retaining ring, one end face of is the retaining ring circularly defines a plurality of first grooves, and a tail end of each bent portion penetrates through the corresponding clamping groove and is clamped in the first groove.

13. The motor according to claim 12 , wherein a plurality of second grooves are uniformly and circularly defined in an inner arc surface of the retaining ring, and each clamping block is clamped into one of the second grooves.

14. A liquid pump, comprising:
a pump; and
the motor of claim 9 driving the pump to operate.

15. A fan device, comprising:
a driving device having a shaft;
a fan wheel defining a shaft hole to receive the shaft;
a locking fastener to lock the fan wheel on the shaft; and wherein the locking fastener has a thermal expansion coefficient same as a thermal expansion coefficient of the shaft;
wherein the fan wheel further comprises a fixing member and an outer ring part, the fixing member is disposed at an axis position of the outer ring part and is convexly formed from the outer ring part, and the shaft hole penetrates through the fixing member along an axis; the locking fastener is of a hollow cylindrical nail body, a nail head is arranged in one end of the locking fastener and a plurality of leaflets divided by a gap arranged in the other end of the locking fastener, and the nail head resists against one end of the fixing member; and a plurality of clamping grooves are formed in an end wall at one end of the fixing member, the other end of the locking fastener is provided with bent portions, and the other end of the fixing member away from the clamping grooves resists against one corresponding nail head and the bent portions are clamped in the clamping grooves.

Assignees

• Johnson Electric Sa
• Johnson Electric Int Ag

Inventors

• Li Min
• Wu Jin Jin
• Chong Kok Ang

Classifications

• F04D29/023 Primary

  especially adapted for elastic fluid pumps · CPC title

• F05D2300/50211

  similar · CPC title

• F04D29/263

  mounting fan or blower rotors on shafts · CPC title

• F04D17/08

  Centrifugal pumps · CPC title

• F04D29/053

  Shafts · CPC title