CN210201616U

CN210201616U - Miniature direct current motor with binding post

Info

Publication number: CN210201616U
Application number: CN201921405331.8U
Authority: CN
Inventors: Honghua Huang; 黄红华; Feng Liu; 刘峰
Original assignee: Changzhou De Lai Electric Machine Co Ltd
Current assignee: Changzhou De Lai Electric Machine Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-03-27
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses a miniature DC motor with a wiring terminal, which belongs to the technical field of DC motors, and the technical proposal is characterized in that the miniature DC motor comprises a motor shell, a rear cover and a wire, wherein a stator and a rotor are arranged in the motor shell, a rotating shaft is fixedly arranged at the axis of the rotor, and a stator sleeve is arranged on the circumferential outer surface of the rotor; the conducting wire comprises an insulating layer, a coated wire core and an exposed wire core, the circuit board is symmetrically provided with conducting wire interfaces, and the exposed wire core is positioned at one end of the conducting wire close to the conducting wire interface; the terminal is connected to one end, close to the wire interface, of the exposed wire core and is welded with the wire interface through soldering tin. The utility model discloses have and do not harm the wire sinle silk, the better effect of performance that tensile takes off.

Description

Miniature direct current motor with binding post

Technical Field

The utility model belongs to the technical field of the direct current motor technique and specifically relates to a miniature direct current motor with binding post is related to.

Background

The micro direct current motor refers to a rotating motor which outputs or inputs direct current energy. The general micro dc motor mainly includes a casing, a magnetic ring (i.e. a stator), an armature core (i.e. a rotor), a rotating shaft and a rear cover, the casing is generally in a barrel shape with an opening at the rear end, the rear cover is fastened at the opening at the rear end of the casing, the magnetic ring is sleeved and fixed on the inner wall of the casing, a hole is arranged at the center of the front end of the casing, a front bearing is arranged in the hole, a rear bearing is arranged at the center of the rear cover, the front end of the rotating shaft is sleeved in the front bearing and protrudes out of the front end of the casing, the rear end of the rotating shaft is sleeved in the rear bearing, and the armature core is fixed. After the power is on, the armature core can rotate in the magnetic ring at a high speed, so that the rotating shaft rotates at a high speed to output rotating mechanical energy.

The miniature direct current motor is usually fixedly provided with a circuit board close to the rear cover, one end of the circuit board is arranged towards the armature core, and the circuit board is provided with two through holes for welding wires so as to be externally connected with a power supply through the wires. One end of a wire welded by the existing miniature direct current motor is mostly provided with a through hole, and during production, the welding end of the wire is directly inserted into the through hole and then is welded and fixed in the through hole in a welding tin welding mode.

Among the above-mentioned prior art scheme, the mode of direct soldering tin welding wire sinle silk can lead to the wire sinle silk to turn hard after the heating for the performance that the wire welded the resistance of drawing off becomes poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature DC motor with binding post has and does not harm the wire sinle silk, the better effect of performance that tensile takes off.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a micro direct current motor with a wiring terminal comprises a motor shell, a rear cover and a lead, wherein a stator and a rotor are arranged in the motor shell, a rotating shaft is fixedly arranged at the axis of the rotor in a penetrating manner, and the stator is fixedly sleeved outside the rotor; the lead comprises an insulating layer, a coated wire core and an exposed wire core, a lead interface is symmetrically arranged on the circuit board, and the exposed wire core is positioned at one end of the lead close to the lead interface; and one end of the exposed wire core, which is close to the wire interface, is connected with a wiring terminal, and the wiring terminal is welded with the wire interface.

Through adopting above-mentioned technical scheme, utilize binding post connecting wire to through binding post and circuit board welding, prevent that the wire from exposing the damage of sinle silk, and increased the tensile of wire and taken off the performance, prevent to take off the welding.

The utility model discloses further set up to, binding post one end is passed through the crimping cladding and is in expose sinle silk circumference surface, the other end passes through the crimping cover to be established the insulating layer surface, binding post still includes U type baffle, U type baffle is located wire interface top, just U type baffle one side lateral wall with wire interface welding.

By adopting the technical scheme, one end of the connecting terminal is completely coated with the exposed wire core, so that the function of protecting the exposed wire core is achieved, and the function of conducting current is also achieved; the other end of the wiring terminal is sleeved on the insulating layer, so that the insulating layer close to one side of the exposed wire core is prevented from being damaged when the U-shaped baffle is welded.

The utility model discloses further set up to, the circuit board with be equipped with the shock attenuation cotton between the back lid, the shock attenuation cotton is kept away from circuit board one side and is connected with the insulating film.

By adopting the technical scheme, the damping cotton is used for reducing the noise generated when the motor works; in order to prevent the wiring, the wiring terminal conducts current and conducts the current through the rear cover, so that the insulation film is arranged on the damping cotton.

The utility model discloses further set up to, the wire is close to circuit board one side and has cup jointed the grommet, the grommet is close to wire interface one end lateral wall cover is equipped with solid fixed ring, motor housing is close to back lid one end lateral wall has seted up the breach of being qualified for the next round of competitions, the grommet card is gone into in the breach of being qualified for the next round of competitions, gu fixed ring keeps away from wire interface one end lateral wall with motor housing inside wall butt.

By adopting the technical scheme, the wire protecting ring is used for protecting the wires at the wire interface, and the phenomenon that the insulating layer is broken or broken after the wires are rubbed with the end face of the motor shell for a long time is prevented. The fixed ring at the other end of the protective ring is abutted against the inner side wall of the motor shell to prevent the protective ring from falling off.

The utility model discloses further set up to, the stator includes the edge positive pole magnetic ring and the negative pole magnetic ring that motor housing axis symmetry set up, positive pole magnetic ring with the butt has the card reed between the tip of negative pole magnetic ring along its pitch arc direction.

Through adopting above-mentioned technical scheme, the card reed at both ends is used for butt anodal magnetic ring and negative pole magnetic ring, prevents that the stator from taking place the displacement.

The utility model discloses further set up to, motor housing circumference surface cover is equipped with protects the magnetosphere, protect the magnetosphere lateral wall along its axial opening.

Through adopting above-mentioned technical scheme, protecting the magnetosphere cover and locating motor housing surface, promoted motor housing's thickness, effectively reduced direct current motor magnetic leakage's problem, and the opening of protecting the magnetosphere makes and protects the magnetosphere when cup jointing, can suitably enlarge its internal diameter from the opening part, and the convenient protective magnetosphere who cup joints is hugged closely motor housing.

The utility model discloses further set up to, the locating hole has been seted up on the motor housing, protect the inboard orientation of magnetosphere the locating hole is equipped with the location arch, the location arch insert extremely in the locating hole.

Through adopting above-mentioned technical scheme, the lock joint of location arch and locating hole has avoided protecting the relative rotation between magnetic ring and the motor housing to improve and protect the stability of magnetic ring installation.

To sum up, the utility model discloses following beneficial effect has:

1. through the arrangement of the wiring terminal, the effects of connecting the lead and the circuit board, reducing the damage to the exposed core of the lead during welding and improving the anti-pull-off performance of the lead can be achieved;

2. the damping cotton is arranged, so that the effect of reducing noise generated when the motor works can be achieved;

3. through the setting of insulating film, can play the effect that prevents that the current from switching on away through the back lid.

Drawings

Fig. 1 is a schematic view of the overall structure of the micro dc motor of the present embodiment.

Fig. 2 is an exploded view of the overall structure of the micro dc motor in this embodiment.

Fig. 3 is a partially enlarged view of a portion a of fig. 2, illustrating a structure of a body wire connecting terminal.

In the figure, 1, a motor shell; 11. a wire outlet notch; 12. a rear cover; 13. an installation opening; 2. protecting a magnetic ring; 21. an opening; 22. positioning holes; 23. positioning the projection; 3. a stator; 31. a positive pole magnetic ring; 32. a negative pole magnetic ring; 33. a clamping spring piece; 4. a rotor; 5. a rotating shaft; 51. a front bearing; 52. a commutator; 53. an electric terminal is connected; 54. a rear bearing; 55. an insulating framework; 6. a circuit board; 61. a wire interface; 7. a wire; 71. exposing the wire core; 72. coating the wire core; 73. an insulating layer; 74. a grommet; 75. a fixing ring; 8. a wiring terminal; 81. a U-shaped baffle plate; 9. Damping cotton; 91. an insulating film.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1, the micro dc motor with a terminal disclosed in this embodiment includes a magnetic shield ring 2, a motor housing 1, and a rear cover 12. The magnetic protection ring 2 is sleeved on the circumferential outer surface of the motor shell 1 and used for increasing the thickness of the motor shell 1 and reducing the magnetic leakage phenomenon of the motor. One end of the motor housing 1 is provided with an installation opening 13 (as shown in fig. 2) for installing the internal structure of the motor housing 1, and the rear cover 12 is located at the installation opening 13 for plugging the motor housing 1 to prevent the internal structure of the motor from scattering.

Referring to fig. 1 and 2, in order to make the magnetic shield ring 2 closely contact with the motor housing 1 after being sleeved on the motor housing 1, the magnetic shield ring 2 is provided with an opening 21 along the axial direction thereof, and when the magnetic shield ring 2 is sleeved, the inner diameter thereof can be properly enlarged along the opening 21. Preferably, in order to avoid relative rotation between the magnetic protection ring 2 and the motor housing 1, the motor housing 1 is provided with a positioning hole 22, a positioning protrusion 23 is arranged on the inner side of the magnetic protection ring 2 facing the positioning hole 22, and the positioning protrusion 23 is clamped in the positioning hole 22, so that the stability of mounting the magnetic protection ring 2 is improved.

Referring to fig. 2, a stator 3, a rotor 4 and a rotating shaft 5 are arranged inside the motor housing 1, the rotor 4 is fixedly sleeved on the rotating shaft 5, the stator 3 is fixedly sleeved outside the rotor 4, and one side of the stator 3, which is far away from the rotor 4, is connected with the inner surface of the motor housing 1. A certain air gap is reserved between the stator 3 and the rotor 4, so that the rotor does not rub with the stator when rotating, a chamber is swept, and the motor is burnt out. The stator 3 comprises an anode magnetic ring 31 and a cathode magnetic ring 32 which are symmetrically arranged along the axis of the motor shell 1, a clamping spring piece 33 is arranged between one end of the anode magnetic ring 31 along the arc direction and one end of the cathode magnetic ring 32 along the arc direction, the clamping spring piece 33 is U-shaped and is abutted against the anode magnetic ring 31 and the cathode magnetic ring 32 on two sides of the clamping spring piece to prevent the anode magnetic ring 31 and the cathode magnetic ring 32 from displacing and keep the magnetic field between the stator 3 stable.

Referring to fig. 2, a rear bearing 54 is sleeved on a side wall of the rotating shaft 5 near the mounting opening 13, a front bearing 51 is sleeved on a side wall of the rotating shaft 5 far from the rear bearing 54, and the front bearing 51 and the rear bearing 54 are used for supporting the rotating shaft 5 to rotate and reducing rotation friction. A commutator 52 is arranged between the rotor 4 and the rear bearing 54 in the motor housing 1, and the commutator 52 is also sleeved on the rotating shaft 5. An insulating framework 55 is further arranged in the motor shell 1, one side of the insulating framework 55 is abutted against the commutator 52 and sleeved on the outer surface of the rear bearing 54. The circuit board 6 is embedded in the position, close to the rear cover 12, of the insulating framework 55, the electric terminals 53 are symmetrically arranged on one side, close to the insulating framework 55, of the commutator 52, and the electric terminals 53 penetrate through the insulating framework 55 to be welded with the circuit board 6.

Referring to fig. 1 and 3, the circuit board 6 is symmetrically provided with wire interfaces 61, and the wires 7 are connected to the wire interfaces 61. The lead 7 comprises an exposed wire core 71 and a coated wire core 72 which are connected, and the circumferential outer surface of the coated wire core 72 is coated with an insulating layer 73. Preferably, the exposed wire core 71 is crimped with the connecting terminal 8, and one end of the connecting terminal 8 far away from the exposed wire core 71 is sleeved on the side wall of the insulating layer 73 close to one end of the exposed wire core 71. The connecting terminal 8 further comprises a U-shaped baffle 81, wherein one side wall of the U-shaped baffle 81 is positioned above the wire interface 61, and the U-shaped baffle 81 of the connecting terminal 8 is welded with the circuit board 6 through soldering tin, so that the wire 7 is connected with the circuit board 6, and the damage of the wire 7 can be effectively avoided. And a damping cotton 9 is arranged between the circuit board 6 and the rear cover 12 and used for reducing noise generated by the rotation of the rotor 4 in the motor. The side of the shock absorbing cotton 9 close to the rear cover 12 is connected with an insulating film 91 which prevents the current from being conducted to the rear cover 12 through the terminal.

Referring to fig. 1 and 2, the motor housing 1 is further provided with an outlet gap 11, a grommet 74 is clamped at a position close to the outlet gap 11, the grommet 74 is sleeved on the outer side of the circumferential direction of the wire 7, and the grommet 74 is used for protecting the wire 7 at the outlet gap 11, so that the phenomenon that the insulating layer 73 of the wire 7 is broken or the wire 7 is broken due to frequent friction between the wire 7 at the position and the side wall of the motor housing 1 is avoided. The grommet 74 is fitted with a fixing ring 75 on the side facing the wire connection port 61, and the fixing ring 75 and the grommet 74 are integrally formed and both are made of an elastic insulating material. The fixing ring 75 abuts against the inner wall of the motor housing 1 toward the side of the wire outlet notch 11.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A micro direct current motor with a wiring terminal comprises a motor shell (1), a rear cover (12) and a wire (7), wherein a stator (3) and a rotor (4) are arranged in the motor shell (1), a rotating shaft (5) is fixedly arranged at the axis of the rotor (4) in a penetrating manner, and the stator (3) is fixedly sleeved on the outer side of the rotor (4); the lead (7) comprises an insulating layer (73), a coated wire core (72) and an exposed wire core (71), a lead interface (61) is symmetrically arranged on the circuit board (6), and the exposed wire core (71) is positioned at one end, close to the lead interface (61), of the lead (7); the method is characterized in that: expose sinle silk (71) and be close to wire interface (61) one end is connected with binding post (8), binding post (8) with wire interface (61) welding.

2. The micro direct current motor with the connecting terminal as claimed in claim 1, wherein: binding post (8) one end is passed through the crimping cladding and is in expose sinle silk (71) circumference surface, the other end passes through the crimping cover and establishes insulating layer (73) surface, binding post (8) still include U type baffle (81), U type baffle (81) are located wire interface (61) top, just U type baffle (81) one side lateral wall with wire interface (61) welding.

3. The micro direct current motor with the connecting terminal as claimed in claim 2, wherein: the damping cotton (9) is arranged between the circuit board (6) and the rear cover (12), and one side, away from the circuit board (6), of the damping cotton (9) is connected with the insulating film (91).

4. The micro direct current motor with the connecting terminal as claimed in claim 1, wherein: wire (7) are close to circuit board (6) one side cover and are equipped with grommet (74), grommet (74) are close to wire interface (61) one end lateral wall has cup jointed solid fixed ring (75), motor housing (1) is close to back lid (12) one end lateral wall has seted up breach (11) of being qualified for the next round of competitions, grommet (74) card is gone into in breach (11) of being qualified for the next round of competitions, gu fixed ring (75) are kept away from wire interface (61) one end lateral wall with motor housing (1) inside wall butt.

5. The micro direct current motor with the connecting terminal as claimed in claim 1, wherein: the stator (3) comprises a positive pole magnetic ring (31) and a negative pole magnetic ring (32) which are symmetrically arranged along the axis of the motor shell (1), and a clamping spring piece (33) is abutted between the ends of the positive pole magnetic ring (31) and the negative pole magnetic ring (32) along the arc direction.

6. The micro direct current motor with the connecting terminal as claimed in claim 1, wherein: the motor housing (1) circumference surface cover is equipped with protects magnetic ring (2), it is equipped with opening (21) along its axial to protect magnetic ring (2) lateral wall.

7. The micro direct current motor with the connecting terminal as claimed in claim 6, wherein: the motor is characterized in that a positioning hole (22) is formed in the motor shell (1), a positioning bulge (23) is arranged on the inner side of the magnetic protection ring (2) and faces the positioning hole (22), and the positioning bulge (23) is inserted into the positioning hole (22).