CN210431156U - Miniature direct current motor with half-wave rectification and overcurrent protection - Google Patents
Miniature direct current motor with half-wave rectification and overcurrent protection Download PDFInfo
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- CN210431156U CN210431156U CN201921124238.XU CN201921124238U CN210431156U CN 210431156 U CN210431156 U CN 210431156U CN 201921124238 U CN201921124238 U CN 201921124238U CN 210431156 U CN210431156 U CN 210431156U
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- end cover
- shell
- wave rectification
- direct current
- electrically connected
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Abstract
The utility model discloses a miniature DC motor with both half-wave rectification and overcurrent protection, relating to the technical field of motors; the device comprises a shell and an end cover, wherein the shell is in a cylindrical shape with an opening, and the end cover covers the opening of the shell; the carbon brushes are oppositely and fixedly arranged in the end cover, and the carbon brushes are respectively covered with an internal terminal; a rectifier diode and an overcurrent protector are fixedly arranged in the end cover, a group of electric contact terminals are fixedly arranged on the end cover, one ends of the electric contact terminals extend out of the end cover, one of the electric contact terminals is electrically connected with one end of the rectifier diode, and the other end of the rectifier diode is electrically connected with one of the carbon brushes; the other electric contact terminal is electrically connected with one end of the overcurrent protector, and the other end of the overcurrent protector is electrically connected with the other carbon brush; the utility model has the advantages that: the motor can be directly connected with alternating current to work, has an overcurrent protection function, and cannot change the volume and the appearance of the motor.
Description
Technical Field
The utility model relates to the technical field of electric machines, more specifically the utility model relates to a compromise half-wave rectification and overcurrent protection's miniature direct current motor.
Background
Household appliances such as a dust collector, an air pump and the like generally work by adopting 110V-240V alternating current, and a common alternating current motor is large in size, heavy in mass and poor in adjustability; the miniature direct current motor is limited in use of a handheld product, does not meet the market requirements of being small and exquisite and light, and can be widely used in daily work and life.
The existing solution is to connect the full-wave rectification of the alternating current to the micro direct current motor, so a special full-wave rectification circuit and an overcurrent protection circuit must be added outside the motor, the volume of the motor must be increased, the assembly space of the motor is increased, and the appearance and consistency of the motor are affected.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model provides a compromise half-wave rectification and overcurrent protection's miniature DC motor, this miniature DC motor can the direct access alternating current work have overcurrent protection function simultaneously to the volume and the outward appearance of motor can not change.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a compromise miniature direct current motor of half-wave rectification and overcurrent protection which improves and lies in: the device comprises a shell and an end cover, wherein the shell is in a cylindrical shape with an opening, and the end cover covers the opening of the shell;
the inner parts of the end covers are oppositely and fixedly provided with carbon brushes, and the carbon brushes are respectively covered with an inner terminal;
a rectifier diode and an overcurrent protector are fixedly arranged in the end cover, a group of electric contact terminals are fixedly arranged on the end cover, one ends of the electric contact terminals extend out of the end cover, one of the electric contact terminals is electrically connected with one end of the rectifier diode, and the other end of the rectifier diode is electrically connected with one of the carbon brushes;
the other electric contact terminal is electrically connected with one end of the overcurrent protector, and the other end of the overcurrent protector is electrically connected with the other carbon brush.
In the above structure, a return spring is further disposed inside the end cap, one end of the return spring abuts against the inner wall of the end cap, and the other end of the return spring is pressed against the internal terminal.
In the above structure, the micro dc motor with both half-wave rectification and overcurrent protection further includes a stator core, a rotor, and a central shaft;
the stator magnetic core is fixedly arranged inside the shell, the central rotating shaft penetrates through the center of the rotor, and the central rotating shaft is rotatably arranged on the shell and the end cover, so that the rotor is positioned at the center of the stator magnetic core.
In the structure, the center of the end cover is fixedly provided with a first bearing, the shell is fixedly provided with a second bearing, and two ends of the central rotating shaft are respectively arranged on the first bearing and the second bearing.
The utility model has the advantages that: a rectifier diode is designed and installed on the rear cover of the motor with the original size, alternating current is converted into direct current in a half-wave rectification mode, one end of the rectifier diode is connected with an alternating current input end, the other end of the rectifier diode is connected with one end of an armature winding, the other end of the armature winding is connected with an over-current protector 205, and the other end of the over-current protector is connected with one end of the alternating current input; therefore, the miniature direct current motor can be directly connected with alternating current to work and has an overcurrent protection function, the size and the appearance of the motor cannot be changed, and the consistency of the appearance of the motor is ensured.
Drawings
Fig. 1 is the utility model discloses a compromise half-wave rectification and overcurrent protection's miniature direct current motor's three-dimensional structure chart.
Fig. 2 is the utility model discloses a compromise miniature dc motor's of half-wave rectification and overcurrent protection decomposition structure chart.
Fig. 3 is the utility model discloses a compromise half-wave rectification and overcurrent protection's miniature dc motor's end cover internal structure sketch map.
Fig. 4 is the utility model discloses a compromise half-wave rectification and overcurrent protection's miniature dc motor's end cover decomposition structure sketch map.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.
Referring to fig. 1 to 4, the present invention discloses a micro dc motor with both half-wave rectification and overcurrent protection, specifically, the motor includes a housing 10 and an end cap 20, the housing 10 is cylindrical with an opening, the end cap 20 covers the opening of the housing 10, in addition, as shown in fig. 2, the micro dc motor with both half-wave rectification and overcurrent protection further includes a stator magnetic core 30, a rotor 40 and a central rotating shaft 50, the stator magnetic core 30 is fixedly disposed inside the housing 10, the central rotating shaft 50 passes through the center of the rotor 40, the central rotating shaft 50 is rotatably mounted on the housing 10 and the end cap 20, so that the rotor 40 is located at the center of the stator magnetic core 30, and an armature winding is wound on the rotor 40; as shown in fig. 3, a first bearing 201 is fixedly disposed at the center of the end cap 20, a second bearing (not shown) is fixedly disposed on the housing 10, and two ends of the central rotating shaft 50 are respectively mounted on the first bearing 201 and the second bearing.
In the above embodiment, as shown in fig. 3 and 4, the end caps 20 are internally and oppositely fixed with carbon brushes 202, the carbon brushes 202 are respectively covered with an internal terminal 203, the fixing of the carbon brushes 202 is realized through the internal terminal 203, and the two carbon brushes 202 are respectively and electrically connected with the armature winding on the rotor 40, so that the rotation of the rotor 40 is realized after the power is turned on; further, a rectifier diode 204 and an overcurrent protector 205 are fixedly mounted inside the end cover 20, a set of electrical contact terminals 206 is fixedly disposed on the end cover 20, one end of the electrical contact terminal 206 extends out of the end cover 20, and the two electrical contact terminals 206 are respectively connected to a current input end; the other electrical contact terminal 206 is electrically connected to one end of the overcurrent protector 205, and the other end of the overcurrent protector 205 is electrically connected to the other carbon brush 202. In this embodiment, the over-current protector 205 is a PTC thermistor.
In addition, a return spring 207 is further disposed inside the end cap 20, one end of the return spring 207 abuts against the inner wall of the end cap 20, the other end of the return spring 207 is pressed against the internal terminal 203, and the internal terminal 203 is pressed against the carbon brush 202 under the action of the return spring 207, so that the electrical connection between the internal terminal 203 and the carbon brush 202 is realized.
Through the structure, a rectifier diode is designed and installed on the rear cover of the original-size motor, alternating current is converted into direct current in a half-wave rectification mode, one end of the rectifier diode is connected with an alternating current input end, the other end of the rectifier diode is connected with one end of an armature winding, the other end of the armature winding is connected with the over-current protector 205, and the other end of the over-current protector 205 is connected with one end of an alternating current input; therefore, the miniature direct current motor can be directly connected with alternating current to work and has an overcurrent protection function, the size and the appearance of the motor cannot be changed, and the consistency of the appearance of the motor is ensured.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (4)
1. The utility model provides a compromise miniature direct current motor of half-wave rectification and overcurrent protection which characterized in that: the device comprises a shell and an end cover, wherein the shell is in a cylindrical shape with an opening, and the end cover covers the opening of the shell;
the inner parts of the end covers are oppositely and fixedly provided with carbon brushes, and the carbon brushes are respectively covered with an inner terminal;
a rectifier diode and an overcurrent protector are fixedly arranged in the end cover, a group of electric contact terminals are fixedly arranged on the end cover, one ends of the electric contact terminals extend out of the end cover, one of the electric contact terminals is electrically connected with one end of the rectifier diode, and the other end of the rectifier diode is electrically connected with one of the carbon brushes;
the other electric contact terminal is electrically connected with one end of the overcurrent protector, and the other end of the overcurrent protector is electrically connected with the other carbon brush.
2. The miniature direct current motor with both half-wave rectification and over-current protection as claimed in claim 1, wherein: and a return spring is also arranged in the end cover, one end of the return spring is propped against the inner wall of the end cover, and the other end of the return spring is tightly pressed on the internal terminal.
3. The miniature direct current motor with both half-wave rectification and over-current protection as claimed in claim 1, wherein: the miniature direct current motor with both half-wave rectification and overcurrent protection also comprises a stator magnetic core, a rotor and a central rotating shaft;
the stator magnetic core is fixedly arranged inside the shell, the central rotating shaft penetrates through the center of the rotor, and the central rotating shaft is rotatably arranged on the shell and the end cover, so that the rotor is positioned at the center of the stator magnetic core.
4. The miniature direct current motor with both half-wave rectification and over-current protection as claimed in claim 3, wherein: the center department of end cover fixedly be provided with first bearing, the shell on fixedly be provided with the second bearing, the both ends of central pivot are installed respectively on first bearing and second bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921124238.XU CN210431156U (en) | 2019-07-17 | 2019-07-17 | Miniature direct current motor with half-wave rectification and overcurrent protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921124238.XU CN210431156U (en) | 2019-07-17 | 2019-07-17 | Miniature direct current motor with half-wave rectification and overcurrent protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210431156U true CN210431156U (en) | 2020-04-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921124238.XU Active CN210431156U (en) | 2019-07-17 | 2019-07-17 | Miniature direct current motor with half-wave rectification and overcurrent protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210431156U (en) |
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2019
- 2019-07-17 CN CN201921124238.XU patent/CN210431156U/en active Active
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