CN211089109U

CN211089109U - Overheat power-off protection device of motor

Info

Publication number: CN211089109U
Application number: CN202020082154.0U
Authority: CN
Inventors: 李叶韩
Original assignee: Foshan Shunde Sanxin Motor Co ltd
Current assignee: Foshan Shunde Sanxin Motor Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-07-24
Anticipated expiration: 2030-01-14

Abstract

The utility model discloses an overheated outage protection device of motor, including motor housing, the last outage box that is provided with of motor housing, be provided with the interface of connecting external power source on the outage box, and with interface connection's conducting block, be provided with in the outage box and connect the circular telegram department with the inside circuit connection of motor, install in the outage box and be used for the drive the conducting block with connect the toggle mechanism that the electric department is connected or is broken off, toggle mechanism includes that one end is fixed shell fragment on the outage box, and with the heat conduction piece of motor housing butt, the heat conduction piece with the shell fragment is connected, the other end and the conducting block rigid coupling of shell fragment. The motor shell can be automatically powered off after reaching a certain temperature, the power-off action is realized through a mechanical principle, the motor shell is accurate and reliable, and the problem that the motor shell and the interior of the motor shell are heated up and burnt due to heat accumulation is avoided.

Description

Overheat power-off protection device of motor

Technical Field

The utility model relates to a motor field, in particular to overheat power-off protection device of motor.

Background

An electric motor is a device that converts electrical energy into mechanical energy. The electromagnetic power generator utilizes an electrified coil (namely a stator winding) to generate a rotating magnetic field and acts on a rotor (such as a squirrel-cage closed aluminum frame) to form magnetoelectric power rotating torque. The motor mainly comprises a stator and a rotor, and the direction of the forced movement of the electrified conducting wire in a magnetic field is related to the current direction and the direction of a magnetic induction line (magnetic field direction). In the existing motor structure, a motor adopts a sealed shell, the front end and the rear end of the motor are rotationally connected with a main shaft of the motor through a bearing shaft sleeve, a rotor is fixedly connected with the main shaft, after the motor is electrified, the rotor is rotated by electromagnetic force between a stator and the rotor, namely, the main shaft of the motor is driven to rotate to output kinetic energy, in the eating process, part of electric energy is converted into heat energy, part of the kinetic energy is converted into the heat energy due to friction, the heat energy is not easy to be dissipated outwards in a sealed space and can only be dissipated by a shell of the motor, so that the motor is heated continuously, and if the motor is.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an overheated outage protection device of motor can realize the auto-power-off after motor housing reaches the uniform temperature, and the outage action is realized through mechanical principle, and is accurate reliable.

According to the utility model discloses an overheated outage protection device of motor of first aspect embodiment, including motor housing, the last outage box that is provided with of motor housing, be provided with the interface of connecting external power source on the outage box, and with interface connection's conducting block, be provided with in the outage box and connect the electric department with the inside circuit connection circular telegram of motor, install in the outage box and be used for the drive the conducting block with connect the toggle mechanism that electric department is connected or is broken off, toggle mechanism includes that one end is fixed shell fragment on the outage box, and with the heat conduction piece of motor housing butt, the heat conduction piece with the shell fragment is connected, the other end and the conducting block rigid coupling of shell fragment.

According to the utility model discloses overheated outage protection device of motor has following beneficial effect at least: make conducting block and connect the department of connecing the electricity or disconnection through toggle mechanism, realize external power source and motor internal circuit's switch-on and disconnection, wherein utilize the heat conduction of motor housing to on the shell fragment, make the shell fragment take place to warp to order about the conducting block motion, make motor housing can realize auto-power-off after reaching the uniform temperature, the outage action is realized through mechanical principle, and is accurate reliable, has avoided the heat to gather and has leaded to motor housing and inside intensification and the problem of burning out.

According to some embodiments of the utility model, toggle mechanism still include with the heat-generating body that the shell fragment is connected, the heat-generating body is connected with temperature control device, temperature control device is including installing the inside temperature sensor at motor housing.

According to some embodiments of the utility model, the shell fragment includes the foil, the foil rigid coupling the one end of conducting block is provided with the limit of bending along its length direction's symmetry.

According to some embodiments of the invention, the material of the spring plate comprises a thermal bimetal.

According to some embodiments of the present invention, the thermal bimetal comprises a composite material combined from a plurality of metals having different coefficients of expansion.

According to some embodiments of the utility model, the through-hole has been seted up to the tip of shell fragment, the conducting block is provided with and runs through the convex part of through-hole installation.

According to some embodiments of the utility model, the lower part of conducting block is provided with the metal block, be connected with the electric wire on the metal block, the electric wire runs through the convex part extends to the outside of outage box.

According to some embodiments of the invention, the power failure box is made of an insulating material.

According to some embodiments of the invention, the conductive block is made of an insulating material.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic diagram of the internal structure of the embodiment of the present invention;

fig. 2 is a schematic structural view of a toggle mechanism according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of the toggle mechanism according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a spring plate according to an embodiment of the present invention;

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 4, according to the utility model discloses an overheated outage protection device of motor of first aspect embodiment, including motor housing 100, motor housing 100 is last to be provided with outage box 200, be provided with the interface of connecting external power source on outage box 200, and with interface connection's conducting block 210, be provided with in the outage box 200 and connect the electric department 220 with the circular connection circular telegram of motor inside, install in the outage box 200 and be used for the drive conducting block 210 with connect the toggle mechanism 230 that electric department 220 connects or breaks off, toggle mechanism 230 includes that one end is fixed shell fragment 231 on the outage box 200, and with the heat conduction piece 232 of motor housing 100 butt, heat conduction piece 232 with shell fragment 231 is connected, the other end and the conducting block 210 rigid coupling of shell fragment 231. In a conventional state, the conductive block 210 is connected with the power connection part 220 to be powered on, after the motor works, the temperature of the motor rises due to heat accumulation caused by long-time work, the heat is conducted to the elastic sheet 231 from the heat conduction block 232, at the moment, the temperature of the elastic sheet 231 rises and deforms, so that the conductive block 210 is separated from the power connection part 220 to be powered off, the motor stops running, the temperature is gradually reduced, and the elastic sheet 231 is restored to the original state to enable the conductive block 210 and the power connection part 220 to be powered on again.

The conducting block 210 is connected or disconnected with the power connection part 220 through the toggle mechanism 230, so that the connection and disconnection of an external power supply and an internal circuit of the motor are realized, wherein the heat of the motor shell 100 is conducted to the elastic sheet 231, the elastic sheet 231 is deformed, the conducting block 210 is driven to move, the automatic power failure can be realized after the motor shell 100 reaches a certain temperature, the power failure action is realized through a mechanical principle, the operation is accurate and reliable, and the problem that the motor shell 100 and the inside are heated up to be burnt due to heat accumulation is avoided.

Further, according to the utility model discloses a few embodiments, in order to improve temperature control's the degree of accuracy, toggle mechanism 230 still include with heat-generating body 233 that shell fragment 231 is connected, heat-generating body 233 is connected with temperature control device, temperature control device is including installing the inside temperature sensor of motor housing 100. The temperature of the motor housing 100 is accurately measured by the temperature sensor and fed back to the temperature control device, so that the heating element 233 is controlled to heat, the elastic sheet 231 is heated and deformed, and the connection and disconnection between the conductive block 210 and the power connection part 220 are controlled.

Further, according to some embodiments of the present invention, the elastic piece 231 includes a metal sheet, and one end of the metal sheet is fixedly connected to the conductive block 210 and is provided with a bending edge 2311 along the symmetry of the length direction. The direction and amplitude of the deformation of the elastic piece 231 can be controlled by the arrangement position and size of the bending edge 2311.

In particular, according to some embodiments of the present invention, the material of the elastic piece 231 includes thermal bimetal. When the thermal bimetal is heated, the deformation phenomenon can occur due to inconsistent size and volume changes caused by the metal with different expansion coefficients when the temperature changes, the elastic sheet 231 is set to be a square sheet with a folded edge, and the direction of the elastic sheet 231 when the elastic sheet 231 deforms can be controlled by the folded edge 2311.

In particular, according to some embodiments of the present invention, the thermal bimetal comprises a composite material combined from a plurality of metals having different coefficients of expansion.

Further, according to some embodiments of the present invention, in order to facilitate the installation of the conductive block 210 and the elastic piece 231, a through hole 2312 is opened at an end of the elastic piece 231, and the conductive block 210 is provided with a convex portion installed through the through hole 2312. The bosses nest within the through-holes 2312, where the bosses may be flanged to achieve a secure fit with the through-holes 2312.

Further, according to some embodiments of the present invention, the lower portion of the conductive block 210 is provided with a metal block 234, and an electric wire is connected to the metal block 234 and extends to the outside of the breaker box 200 through the convex portion. The current is led out of the power-off box 200 through the wire, so that the accident of electric shock can be avoided, and the use safety is improved.

Further, according to some embodiments of the present invention, in order to improve safety in use, the power cut-off box 200 is made of an insulating material.

Further, according to some embodiments of the present invention, the conductive block 210 is made of an insulating material. The metal block 234 is isolated from the elastic sheet 231 by the insulated conductive block 210, so that the elastic sheet 231 is prevented from being heated when being electrified, and the accuracy of power-off protection is improved.

The present embodiment has been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. The utility model provides an overheated outage protection device of motor, includes motor housing, its characterized in that: the motor comprises a motor shell and is characterized in that a power-off box is arranged on the motor shell, an interface connected with an external power supply and a conductive block connected with the interface are arranged on the power-off box, a power connection part connected with an internal circuit of a motor in a power-on mode is arranged in the power-off box, a shifting mechanism used for driving the conductive block to be connected with or disconnected from the power connection part is arranged in the power-off box, the shifting mechanism comprises a spring plate and a heat conduction block, one end of the spring plate is fixed to the spring plate, the heat conduction block is abutted to the motor shell, the heat conduction block is connected with the spring plate, and the other end.

2. An overheat power-off protection apparatus for an electric motor according to claim 1, wherein: the toggle mechanism further comprises a heating body connected with the elastic sheet, the heating body is connected with a temperature control device, and the temperature control device comprises a temperature sensor arranged inside the motor shell.

3. An overheat power-off protection apparatus for an electric motor according to any one of claims 1 and 2, wherein: the elastic sheet comprises a metal sheet, and bent edges are symmetrically arranged at one end, fixedly connected with the conductive block, of the metal sheet along the length direction of the conductive block.

4. An overheat power-off protection apparatus for an electric motor according to any one of claims 1 and 2, wherein: the material of the elastic sheet comprises thermal bimetal.

5. An overheat power-off protection apparatus for an electric motor according to claim 4, wherein: the thermal bimetal comprises a composite material combined by a plurality of metals with different expansion coefficients.

6. An overheat power-off protection apparatus for an electric motor according to claim 1, wherein: the end part of the elastic sheet is provided with a through hole, and the conductive block is provided with a convex part which penetrates through the through hole for installation.

7. An overheat power-off protection apparatus for an electric motor according to claim 6, wherein: the lower part of the conductive block is provided with a metal block, an electric wire is connected to the metal block, and the electric wire penetrates through the convex part and extends to the outside of the power-off box.

8. An overheat power-off protection apparatus for an electric motor according to claim 1, wherein: the power-off box is made of an insulating material.

9. An overheat power-off protection apparatus for an electric motor according to claim 1, wherein: the conductive block is made of an insulating material.