Motor with flame-resistant terminal connecting device and lead portion

1. A motor, comprising:

a housing accommodating a coil assembly;

a lead portion electrically connected to the coil assembly and configured to be electrically connected to an external connector;

a terminal connecting device connected to the housing and configured to receive the lead portion and the external connector and electrically connect the lead portion with the external connector; and

an isolation component fixed to the terminal connecting device and enclosing a live part of the lead portion together with the terminal connecting device,

wherein the terminal connecting device and the isolation component are both made from a flame-resistant material,

wherein the lead portion comprises:

a pin electrically connected to the coil assembly of the motor;

a support component supporting and accommodating the pin and fixedly holding the pin on the coil assembly; and

one or more terminals made from conductive materials, wherein each terminal comprises a first terminal portion and a second terminal portion, the first terminal portion is directly electrically connected to the pin, the second terminal portion is configured to be directly electrically connected to the external connector, and the terminal is mounted in the terminal connecting device, wherein the first terminal portion and the second terminal portion are integrally formed,

wherein the live part of the lead portion is the pin and the one or more terminals.

2. The motor of claim 1 , wherein the terminal connecting device comprises:

a main body comprising three main body side walls arranged in a generally U shape, the three main body side walls defining a cavity; and

a receptacle integrally formed with the main body, wherein the receptacle is configured to accommodate the external connector.

3. The motor of claim 2 , wherein the housing comprises a notch on a side wall of the housing, the notch communicates with an opening of the housing, and the terminal connecting device is fixedly mounted on the radial outer side of the housing and covers the notch.

4. The motor of claim 2 , wherein

the terminal is mounted in the cavity of the main body.

5. The motor of claim 4 , wherein two main body side walls opposite to each other of the three main body side walls comprise snaps extending from edges thereof, wherein the snaps are configured to be snap-connected to the support component.

6. The motor of claim 4 , wherein

the first terminal portion comprises a first body and an elastic contact, wherein the first body defines a first insertion direction for inserting the pin, the elastic contact extends from the first body, and the elastic contact is configured to be elastically deformed with the insertion of the pin to apply contact force on the pin,

the second terminal portion comprises a second body, wherein the second body defines a second insertion direction for inserting into the external connector, and wherein

each terminal further comprises a bending portion, and the first terminal portion and the second terminal portion are connected via the bending portion, such that the first insertion direction is substantially perpendicular to the second insertion direction.

7. The motor of claim 6 , wherein the first terminal portion further comprises:

a pair of side wings formed by bending from a side of the first body, wherein the elastic contact is formed by bending two surfaces of the pair of side wings toward each other, thereby a pair of contact protrusions is formed, so that when the pin is inserted, an elastic connection is formed between the pin and the pair of contact protrusions.

8. The motor of claim 6 , wherein the main body is provided with a plurality of mounting holes for accommodating the second terminal portion and a plurality of mounting slots for accommodating the first terminal portion, and the mounting holes are arranged adjacent to the corresponding mounting slots to form mounting pairs, wherein each of the mounting pairs is mounted with one of the terminals, and a mounting gap between each of the plurality of mounting slots and the first body is between 0 and 0.5 mm.

9. The motor of claim 8 , wherein a depth of each of the plurality of mounting slots is greater than or equal to a height of the first body of the first terminal portion, and each of the plurality of mounting slots comprises a limit boss that protrudes from at least one side wall of the mounting slots and engages the first terminal portion to limit the vibration of the terminals.

10. The motor of claim 8 , wherein insulating ribs are provided between the adjacent mounting pairs.

11. The motor of claim 8 , wherein a cross-sectional shape of the second terminal portion is rectangular or U-shaped, which comprises at least two second side walls extending along the second insertion direction, the at least two second side walls are configured to be electrically connected to an electrical contact portion of the external connector when the external connector is inserted, wherein the second terminal portion further comprises a snap-fitting elastic member, and the snap-fitting elastic member comprises a free portion extending in a direction away from the second body and extending obliquely with respect to the second body on the at least two second side walls.

12. The motor of claim 11 , wherein each of the plurality of mounting holes comprises:

a guiding positioning rib arranged within the mounting hole, with a width slightly smaller than a width between the inner surfaces of at least two second side walls of the second terminal portion to allow the guiding positioning rib to be received between inner surfaces of the at least two second side walls of the second terminal portion;

an anti-detachment boss protruding from the inner surface of the mounting hole, wherein the anti-detachment boss is configured to form a snap connection with the snap-fitting elastic member when the second terminal portion is mounted.

13. The motor of claim 6 , wherein the elastic contact comprises an elastic arm and a contact protrusion, the elastic arm is bent with respect to the first insertion direction to form a first angle, the first angle ranges from 15 degrees to 50 degrees, wherein the elastic arm is configured to be bent and deformed in a direction that reduces the first angle with the insertion of the pin to generate the contact force, and the contact protrusion is configured to contact the pin to apply the contact force.

14. The motor of claim 13 , wherein the first terminal portion further comprises:

at least one limiting portion formed by bending from a side of the first body, wherein the at least one limiting portion comprises a side wall and a top wall, and the at least one limiting portion is enclosed together with the first body to form a pin cavity for receiving the pin.

15. The motor of claim 14 , wherein the first body comprises a bottom wall, and the elastic contact extends from the bottom wall along the first insert direction, so that an elastic connection is formed between the pin, the top wall and the contact protrusion when the pin is inserted into the pin cavity.

16. The motor of claim 15 , wherein the elastic contact further comprises a support arm that extends from the contact protrusion and forms a second angle with the elastic arm, so that the elastic arm and the support arm form a substantially V-shape.

17. The motor of claim 16 , wherein the second angle ranges from 90 degrees to 130 degrees, so that an end of the support arm is slidable on the bottom wall along the first insertion direction when the pin is inserted into the pin cavity,

a height a of the support arm in a direction perpendicular to the first insertion direction, a height b of the pin cavity in a direction perpendicular to the first insertion direction, and a maximum dimension c of a cross section of the pin satisfy the following relationship: b−a<c and a<b.