Fan, motor driving assembly and load connecting mechanism thereof

Patent metadata

Field	Value
Publication number	US-10359080-B2
Application number	US-201715676443-A
Country	US
Kind code	B2
Filing date	Aug 14, 2017
Priority date	Aug 15, 2016
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A load connecting mechanism includes a mounting portion, a contact portion, and a force-exerting portion. The mounting portion is configured to mount the load connecting mechanism to a power source and a load, respectively. The contact portion is disposed on the mounting portion and includes two slidably coupled contact faces. The force-exerting portion is configured to provide a force to the contact faces in an axial direction of the power source to make the contact faces closely slidably couple to each other. Through the slidable coupling relationship between the contact faces, power of the power source is progressively transmitted to the load and finally drives the load to rotate in synchronization with the power source. The present invention further provides a motor driving assembly and a fan. The mechanism can satisfy the needs of bidirectional rotation of a load such as a fan and of large startup torque.

First claim

The invention claimed is:

1. A load connecting mechanism comprising:
a mounting portion configured to mount the load connecting mechanism to a power source and a load, respectively;
a contact portion disposed on the mounting portion and comprising two slidably coupled contact faces; and
a force-exerting portion configured to provide a force to the contact faces in an axial direction of the power source to make the contact faces closely slidably contact each other, wherein, through the slidable coupling relationship between the contact faces, power of the power source is progressively transmitted to the load and finally drives the load to rotate in synchronization with the power source.

2. The load connecting mechanism of claim 1 , wherein the mounting portion comprises a power source mounting portion and a load mounting portion, the contact portion comprises a first contact portion disposed on the power source mounting portion and a second contact portion disposed on the load mounting portion, the two slidably coupled contact faces are respectively disposed on opposite surfaces of the first contact portion and the second contact portion and contact each other, and the power of the power source is transmitted to the load through a frictional force between the contact faces.

3. The load connecting mechanism of claim 2 , wherein the power source mounting portion is configured to connect to and rotate along with an output shaft of the power source, and the load mounting portion is configured to connect to and rotate along with the load.

4. The load connecting mechanism of claim 3 , wherein the force-exerting portion comprises an elastic member, the elastic member is configured to be tensioned or compressed to provide a pressing force to the first contact portion in an axial direction of the power source toward the second contact portion, and/or provide a pressing force to the second contact portion in the axial direction of the power source toward the first contact portion.

5. The load connecting mechanism of claim 4 , wherein the elastic member is a rubber member, a compression spring or an extension spring.

6. The load connecting mechanism of claim 4 , wherein the power source mounting portion is a tubular structure having an opening at one end and a bottom at an opposite end, the power source mounting portion is attached around an output shaft of the power source and is circumferentially fixed relative to the output shaft, the load mounting portion is a tubular structure having an opening at one end and a bottom at an opposite end, the power source mounting portion is received within the load mounting portion, an endcap is provided at the opening of the load mounting portion, the output shaft of the power source passing through one end of the load mounting portion and the opening of the power source mounting portion into an interior of the power source mounting portion, and the elastic member is compressed, with one end of the elastic member abutting against the power source mounting portion, and the other end of the elastic member abutting against an inner side of said one end of the load mounting portion.

7. The load connecting mechanism of claim 6 , wherein the opening of the load mounting portion and the opening of the power source mounting portion face in the same direction, the endcap defines a hole allowing the output shaft of the power source to pass therethrough, and one end of the elastic member abuts against the endcap.

8. The load connecting mechanism of claim 7 , wherein the endcap has threads, an inner surface of the load mounting portion at the opening thereof has threads engaged with the threads of the endcap, and the endcap is threaded into the opening of the load mounting portion.

9. The load connecting mechanism of claim 8 , wherein the endcap is adjustably threaded into the opening of the load mounting portion, and the force exerted by the elastic member to the first contact portion in the axial direction of the power source toward the second contact portion and/or the force exerted by the elastic member to the second contact portion in the axial direction of the power source toward the first contact portion are adjustable by controlling a position of the endcap threaded into the opening of the load mounting portion.

10. The load connecting mechanism of claim 7 , wherein the first contact portion is the bottom of the power source mounting portion or disposed at one side of the bottom of the power source mounting portion toward the bottom of the load mounting portion, and one side of the first contact portion toward the bottom of the load mounting portion is one of the contact faces.

11. The load connecting mechanism of claim 10 , wherein the second contact portion is the bottom of the load mounting portion or disposed at one side of the bottom of the load mounting portion toward the power source mounting portion, and one side of the second contact portion toward the power source mounting portion is the other of the contact faces.

12. The load connecting mechanism of claim 3 , wherein the force-exerting portion comprises at least two pressing blocks, a first pressing block of the at least two pressing blocks provides a pressing force to the first contact portion in the axial direction of the power source toward the second contact portion, and/or a second pressing block of the at least two pressing blocks provides a pressing force to the second contact portion in the axial direction of the power source toward the first contact portion.

13. The load connecting mechanism of claim 12 , wherein the two pressing blocks are disposed on the output shaft of the power source, and the first contact portion and the second contact portion are disposed between and compressed by the two pressing blocks.

14. The load connecting mechanism of claim 13 , wherein an axial position of at least one of the pressing blocks on the output shaft of the power source is adjustable, and the force exerted by the first pressing block to the first contact portion in the axial direction of the power source toward the second contact portion and/or the force exerted by the second pressing block to the second contact portion in the axial direction of the power source toward the first contact portion are adjustable by adjusting the axial position of the at least one of the pressing blocks on the output shaft of the power source.

15. The load connecting mechanism of claim 2 , wherein at least one of the contact faces is serrated or provided with grainy protrusions.

16. The load connecting mechanism of claim 2 , wherein at least one of the contact faces is made from a rubber material.

17. The load connecting mechanism of claim 2 , wherein one of the contact faces is a truncated-cone-shaped face, and the other contact face is an inner surface of a truncated-cone-shaped recess.

18. The load connecting mechanism of claim 2 , wherein one of the contact portions is in the shape of a spring tab made from a metal material, and the contact face of the contact portion is a curved surface.

19. A motor driving assembly comprising:
a motor as a power source; and
a load connecting mechanism comprising:
a mounting portion configured to mount the load connecting mechanism to the power source and a load, respectively;
a contact portion disposed on the mounting portion and comprising two slidably coupled contact faces; and
a force-exerting portion configured to provide a force to the contact faces in an axial direction of the power source to make the contact faces closely slidably contact

Assignees

• Johnson Electric Sa

Inventors

• Sun Chi Ping
• Liu Bao Ting
• Ta Jing Ning
• Zhou Chui You
• Xin Fei
• Yeung Shing Hin
• Yang Xiu Wen
• Huang Shu Juan

Classifications

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F16D7/025

  with flat clutching surfaces, e.g. discs · CPC title

• F16D13/26

  in which the or each axially-movable member is pressed exclusively against an axially-located member · CPC title

• F16D13/64

  Clutch-plates; Clutch-lamellae (brake-plates, brake-lamellae F16D65/12) · CPC title