CN210201654U

CN210201654U - Pin type micro direct current motor

Info

Publication number: CN210201654U
Application number: CN201921404706.9U
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 pin type micro direct current motor, belonging to the technical field of direct current motors, which has the technical proposal that the micro direct current motor comprises a casing, a circuit board and a rear cover, wherein the circuit board is positioned inside the casing and is arranged close to the rear cover; the symmetry is equipped with the connecting hole on the circuit board, still includes the contact pin that the symmetry set up, the contact pin is close to the one end of connecting hole with the connecting hole passes through soldering tin welding, the casing is close to the contact pin is equipped with first installation breach, the contact pin is worn out first installation breach sets up. The utility model discloses cancelled the mode that the wire between miniature DC motor and the external power supply device is connected, adopted the contact pin to connect, had the convenient effect of connection, electrically conductive bubble cotton ground connection has effectively reduced cost of labor and the process cost that solder joint ground connection brought.

Description

Pin type micro direct current motor

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 of contact pin formula is related to.

Background

The micro direct current motor is a rotating motor capable of converting direct current electric energy into mechanical energy or converting mechanical energy into direct current electric energy, and is a motor capable of realizing mutual conversion of direct current electric energy and mechanical energy. The miniature DC motor mainly comprises a casing, a magnetic ring (stator), an armature core (rotor), a rotating shaft and a rear cover, wherein the casing is generally in a barrel shape with an opening at the rear end, the rear cover is buckled 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 site is formed in the center of the front end of the casing, a front bearing is installed in the hole site, a rear bearing is installed in 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 at the rear part of the. 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.

As shown in fig. 1, the conventional micro dc motor includes a housing 14 and a rear cover 16, wherein a circuit board 2 is fixedly disposed at a position of the housing 14 close to the rear cover 16, and two connection holes 21 for welding wires 3 are disposed on the circuit board 2, so as to externally connect a power supply through the wires 3. The end of the wire 3 remote from the circuit board 2 is crimped to a terminal 31 for connection to a power source (not shown). When part of the surface of the circuit board 2 is exposed to the outside, static electricity is easy to generate electric arcs to the circuit board 2 of the motor 1, which causes the problems that electronic components (not shown in the figure) of the circuit board 2 are damaged and the motor 1 cannot operate, so that the circuit board 2 is also provided with three grounding areas 23 in the circumferential direction, and the three grounding areas are welded with the shell 14 through soldering tin to form grounding welding spots.

Among the above-mentioned prior art scheme, adopt wire welded mode to connect the circuit board, the wire can cause the damage to the wire core after being heated, leads to the wire conductive effect relatively poor, and adopts the wire, just can link to each other motor and power behind the wire other end need crimping binding post, so adopts the wire to connect motor and power, connects comparatively troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature direct current motor of contact pin formula cancels the mode that the wire is connected, adopts the contact pin to connect, has the convenient effect of connection.

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

a pin type micro direct current motor comprises a machine shell, a circuit board and a rear cover, wherein the circuit board is positioned in the machine shell and is close to the rear cover; the symmetry is equipped with the connecting hole on the circuit board, still includes the contact pin that the symmetry set up, the contact pin is close to the one end of connecting hole with the connecting hole welding, the casing is close to the contact pin is equipped with first installation breach, the contact pin is kept away from the one end of connecting hole is worn out first installation breach.

By adopting the technical scheme, the contact pin can be directly plugged with an external power supply, so that the connection is convenient; the installation notch is used for facilitating the contact pin to penetrate out of the shell and not to interfere with the contact pin.

The utility model discloses further set up to, the contact pin is the L type, and it is close to the one end of connecting hole with the axis of connecting hole is coaxial.

Through adopting above-mentioned technical scheme, set up the contact pin of L type, when making things convenient for spot welding to connect the contact pin, leave certain clearance between contact pin and the circuit board, reduce the influence of contact pin to electronic component on the circuit board.

The utility model discloses further set up to, contact pin circumference cover is equipped with the installation shell, the installation shell is close to connecting hole one end lateral wall with first installation breach both sides lateral wall joint.

By adopting the technical scheme, the mounting shell is used for protecting the contact pin and preventing the contact pin from being damaged; the side walls of two sides of the installation shell and the side walls of two sides of the first installation notch are connected in a clamping mode, so that the installation shell can be quickly connected with the machine shell, and the connection between the contact pins and the installation shell is not interfered.

The utility model discloses further set up to, the locating hole has been seted up to installation shell diapire.

Through adopting above-mentioned technical scheme, can fix a position fast when the motor is inserted to external power supply unit through the locating hole to prevent that the contact pin from not inserting completely.

The utility model discloses further set up to, be equipped with the arch of sliding along its axis symmetry on the lateral wall of installation shell both sides.

Through adopting above-mentioned technical scheme, the protruding convenient installation shell that slides of installation shell both sides lateral wall is when inserting external power supply unit on, along the bellied extending direction that slides for insert the orbit stably, can not appear rocking, also make things convenient for the grafting location of contact pin.

The utility model discloses further set up to, the circuit board orientation back lid one side is equipped with the ground connection region, it is cotton to be connected with electrically conductive bubble on the ground connection region, electrically conductive bubble is cotton to be kept away from ground connection region one side with the contact of back lid.

Through adopting above-mentioned technical scheme, utilize the cotton ground connection of electrically conductive bubble, switch on away electrostatic arc through the back lid, reduce the damage of electrostatic arc to the circuit board.

The utility model discloses further set up to, the back lid with be equipped with the shock attenuation cotton between the circuit board, the shock attenuation cotton is close to second installation breach has been seted up to electrically conductive bubble cotton one side, just electrically conductive bubble cotton is located in the second installation breach.

Through adopting above-mentioned technical scheme, the shock attenuation cotton is used for reducing the noise of motor during operation, and second installation breach is used for installing electrically conductive bubble cotton, prevents to electrically conductive bubble cotton and shock attenuation cotton to interfere, can not effectively switch on away electrostatic arc.

The utility model discloses further set up to, the shock attenuation cotton is close to back lid one side is connected with the insulating film.

By adopting the technical scheme, after the circuit is electrified, current flows through the welding spots where the contact pins and the circuit board are connected, and the insulating film is used for preventing the welding spots at the connecting holes from penetrating through the damping cotton to be contacted with the rear cover and conducting the working current to the rear cover to cause circuit short circuit.

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

1. through the arrangement of the contact pins, the effect that the connection between the motor and an external power supply device is convenient and quick can be achieved;

2. through the arrangement of the mounting shell, the effect of protecting the contact pin and preventing the contact pin from being broken or damaged can be achieved;

3. through the cotton setting of electrically conductive bubble, can play the damage that reduces electrostatic arc to the circuit board for the effect of motor normal operating.

Drawings

Fig. 1 is an exploded view of the overall structure of a micro dc motor in the prior art.

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

Fig. 3 is a schematic view of the connection structure of the pin and the mounting case in the embodiment.

In the figure, 1, a motor; 11. a magnetic ring; 12. an armature core; 13. a rotating shaft; 14. a housing; 15. a first mounting notch; 16. a rear cover; 17. an insulating framework; 2. a circuit board; 21. connecting holes; 22. conductive foam; 23. a ground region; 3. a wire; 31. a wiring terminal; 4. inserting a pin; 41. mounting a shell; 411. clamping the groove; 42. a slipping projection; 43. positioning holes; 5. damping cotton; 51. an insulating film; 52. a second mounting notch.

Detailed Description

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

Example (b):

referring to fig. 2, the pin type micro dc motor disclosed in this embodiment includes a housing 14, a circuit board 2, and a rear cover 16, where the housing 14 is riveted to the rear cover 16. An insulating framework 17 is arranged inside the casing 14, the insulating framework 17 is arranged close to the rear cover 16, and the circuit board 2 is fixedly embedded on the insulating framework 17. The casing 14 is also internally provided with a magnetic ring 11, an armature core 12 and a rotating shaft 13, and the armature core 12 is fixedly sleeved on the rotating shaft 13; the magnetic ring 11 is sleeved on the circumferential surface of the armature core 12, and a certain air gap is formed between the magnetic ring and the armature core 12. The circuit board 2 is provided with electronic components (not shown) on one side thereof, and the electronic components are disposed toward the armature core 12 side. The circuit board 2 is externally connected with a power supply device (not shown), and after being electrified, the armature core 12 can rotate in the magnetic ring 11 at a high speed, so that the rotating shaft 13 rotates at a high speed to output rotating mechanical energy.

Referring to fig. 2, a damping cotton 5 is installed between the circuit board 2 and the rear cover 16 for reducing noise generated when the armature core 12 rotates. The circuit board 2 is provided with a grounding area 23 towards one side of the rear cover 16, conductive foam 22 is adhered on the grounding area 23, and the other end of the conductive foam 22 is in contact with the rear cover 16 and used for conducting out the electrostatic arc. In order to avoid the shock absorption cotton 5 interfering with the conductive foam 22, the shock absorption cotton 5 is provided with a second installation notch 52, and the conductive foam 22 is positioned in the second installation notch 52.

Referring to fig. 2 and 3, a first mounting notch 15 is formed in a side wall of the casing 14 near the rear cover 16, and connecting holes 21 are symmetrically formed in the circuit board 2 through the wall thickness of the circuit board 2 near the first mounting notch 15. A contact pin 4 is welded at the connecting hole 21, and the other end of the contact pin 4 penetrates out of the machine shell 14 through the first mounting notch 15. In order to avoid that the welding point at the connecting hole 21 penetrates the shock absorbing cotton 5 when the rear cover 16 is riveted, so that the current flowing through the welding point of the connecting hole 21 is conducted with the rear cover 16 to cause a line short circuit when power is supplied, the side of the shock absorbing cotton 5 close to the rear cover 16 is connected with the insulating film 51. Preferably, the pin 4 of this embodiment is configured to be L-shaped, and one segment of the pin 4 is inserted into the axis of the connection hole 21; the other section of the pin 4 is parallel to the circuit board 2, and a certain gap is formed between the other section of the pin 4 and the circuit board 2, so as to prevent the pin 4 from directly contacting the surface of the circuit board 2 and interfering with electronic components on the surface of the circuit board 2.

Referring to fig. 2 and 3, the first installation notch 15 is further clamped with an installation shell 41, specifically, clamping grooves 411 are symmetrically formed in the side wall of one end of the installation shell 41 facing the first installation notch 15 along the axis of the installation shell 41, and the side walls at two ends of the first installation notch 15 are clamped into the clamping grooves 411. The contact pin 4 penetrates through the wall thickness of the mounting shell 41 and is inserted into the mounting shell 41, and the mounting shell 41 is used for protecting the contact pin 4 and enhancing the stability of the insertion of the motor 1 and an external power supply device. The side walls of two sides of the mounting shell 41 are symmetrically provided with sliding protrusions 42 along the axis, the bottom wall of the mounting shell 41 is provided with positioning holes 43, when the motor 1 is plugged with an external power supply device, the mounting shell 41 corresponds to a socket (not shown in the figure) of the external power supply device and is plugged towards the inside of the socket along the extending direction of the sliding protrusions 42, so that the plug pin 4 is accurately plugged into the socket; the positioning hole 43 can be clamped in the socket, and when the positioning hole 43 is positioned, the plugging is stopped.

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 pin type micro direct current motor comprises a machine shell (14), a circuit board (2) and a rear cover (16), wherein the circuit board (2) is positioned inside the machine shell (14) and is close to the rear cover (16); the circuit board (2) is symmetrically provided with connecting holes (21), and is characterized in that: still including contact pin (4) that the symmetry set up, contact pin (4) are close to the one end of connecting hole (21) with connecting hole (21) welding, casing (14) are close to contact pin (4) are equipped with first installation breach (15), contact pin (4) are kept away from the one end of connecting hole (21) is worn out first installation breach (15).

2. The pin-type micro dc motor according to claim 1, wherein: the contact pin (4) is L-shaped, and one end of the contact pin, which is close to the connecting hole (21), is coaxial with the axis of the connecting hole (21).

3. The pin-type micro dc motor according to claim 1, wherein: contact pin (4) circumference cover is equipped with installation shell (41), installation shell (41) are close to connecting hole (21) one end lateral wall with first installation breach (15) both sides lateral wall joint.

4. The pin-type micro dc motor according to claim 3, wherein: the bottom wall of the mounting shell (41) is provided with a positioning hole (43).

5. The pin-type micro dc motor according to claim 3, wherein: the side walls of the two sides of the mounting shell (41) are symmetrically provided with sliding bulges (42) along the axis.

6. The pin-type micro dc motor according to claim 1, wherein: the circuit board (2) orientation back lid (16) one side is equipped with ground connection region (23), be connected with electrically conductive bubble cotton (22) on ground connection region (23), electrically conductive bubble cotton (22) are kept away from ground connection region (23) one side with back lid (16) contact.

7. The pin-type micro dc motor according to claim 6, wherein: rear cover (16) with be equipped with shock attenuation cotton (5) between circuit board (2), shock attenuation cotton (5) are close to second installation breach (52) have been seted up to electrically conductive bubble cotton (22) one side, just electrically conductive bubble cotton (22) are located in second installation breach (52).

8. The pin-type micro dc motor according to claim 7, wherein: one side of the shock absorption cotton (5) close to the rear cover (16) is connected with an insulating film (51).