CN211980551U

CN211980551U - Overvoltage protector for plug-in brushless electric tool

Info

Publication number: CN211980551U
Application number: CN202021182690.4U
Authority: CN
Inventors: 王添辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2020-11-20
Anticipated expiration: 2030-06-23

Abstract

The utility model relates to an insert brushless electric tool overvoltage protector, overvoltage protector installs on electric tool's power cord, including insulating casing, be equipped with an overvoltage protection circuit board in the insulating casing, overvoltage protection circuit board both ends are equipped with a binding post that is used for being connected with electric tool's power cord respectively, and insulating casing's both ends are seted up respectively and are used for the through-hole that the power cord passes through. This overvoltage protector because the mounted position of whole part is on the power cord, can just can reach overvoltage protection's purpose under the condition that does not change instrument inner structure, can not receive electric tool's high mobility influence again simultaneously and lead to breaking away from, stable in structure, convenient to use.

Description

Overvoltage protector for plug-in brushless electric tool

Technical Field

The utility model relates to an overvoltage protection technical field, more specifically say and indicate an insert brushless electric tool overvoltage protector of electricity.

Background

At present, a brushless electric tool needs a controller to drive, devices inside the controller have the highest voltage limit, and when the voltage of an input power supply is higher than the highest voltage of the devices and no countermeasure is taken, the controller is burnt.

In order to avoid the damage of the controller caused by the overhigh input voltage, some socket type overvoltage protectors appear on the market, for example, a novel overvoltage protector disclosed in the Chinese utility model patent with the publication number of CN201518411U, the overvoltage protector is provided with an insulating shell, an internal circuit board is installed in the insulating shell, and a fuse is connected to the internal circuit board in a conduction mode; the overvoltage protector is also provided with an input terminal which is connected with the internal circuit board in a conduction mode and penetrates out of the insulating shell, and an output terminal which is connected with the internal circuit board in a conduction mode, and the insulating shell is provided with a jack corresponding to the output terminal. Although the utility model discloses a when unusual excessive pressure takes place, overvoltage protector's overvoltage detector detects overvoltage and makes it switch on, blows the fuse rapidly, and the power cut protects domestic appliance effectively, during the use, must insert the commercial socket with input terminal, inserts the jack of overvoltage protector output with domestic appliance's plug. The overvoltage protector arranged between the plug and the socket has certain instability due to the addition of the primary connection, and the influence on the fixedly placed household appliance is not great, but the defect that the plug is easy to separate, the stability is poor and the use is inconvenient due to the fact that the high mobility of the electric tool can amplify the defect.

Disclosure of Invention

Based on the above problem, the utility model provides an insert brushless electric tool overvoltage protector can effectual solution electric tool's overvoltage protection problem, does not influence the electric tool simultaneously and uses, and is convenient for install and change.

The utility model adopts the following technical scheme:

the utility model provides a plug brushless electric tool overvoltage protector, overvoltage protector installs on electric tool's power cord, including insulating casing, be equipped with an overvoltage protection circuit board in the insulating casing, overvoltage protection circuit board both ends are equipped with a binding post that is used for being connected with electric tool's power cord respectively, the through-hole that is used for the power cord passes through is seted up respectively at insulating casing's both ends.

Furthermore, the insulating casing is formed by combining a detachable upper casing and a detachable lower casing, and the two ends of the combined upper casing and the two ends of the combined lower casing are respectively and tightly held and fixed by a hoop.

Furthermore, the wiring terminal is a pressing type wiring terminal.

Furthermore, a wire clamp is respectively arranged inside two ends of the insulating shell.

Furthermore, the overvoltage protection circuit board comprises a protective tube, a bidirectional voltage-sensitive diode, a bidirectional thyristor, a double-color indicator lamp and a current-limiting resistor, wherein the double-color indicator lamp extends out of the insulating shell.

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages:

1. this overvoltage protector because the mounted position of whole part is on the power cord, can just can reach overvoltage protection's purpose under the condition that does not change instrument inner structure, can not receive electric tool's high mobility influence again simultaneously and lead to breaking away from, stable in structure, convenient to use.

2. Insulating casing comprises upper and lower casing, adopts staple bolt locking fixed, does not use the screw in the design, makes the installation become simple, and bare-handed can change.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a schematic circuit diagram of the present invention.

The overvoltage protection circuit board comprises an insulating shell 1, an upper shell 11, a lower shell 12, a wire clamp 13, a through hole 14, an overvoltage protection circuit board 2, a pressing type wiring terminal 21 and a hoop 3.

Detailed Description

The following describes specific embodiments of the present invention with reference to the drawings.

Referring to fig. 1 and 2, an overvoltage protector for an electric brushless electric tool is installed on a power line of the electric tool, and comprises an insulating housing 1, wherein an overvoltage protection circuit board 2 is arranged in the insulating housing 1, two ends of the overvoltage protection circuit board 2 are respectively provided with a pressing type wiring terminal 21 used for being connected with the power line of the electric tool, two ends of the insulating housing 1 are respectively provided with a through hole 14 used for the power line to pass through, and two ends of the insulating housing 1 are respectively and internally provided with a line card 13 used for fixing the power line.

Referring to fig. 1 and 2, the utility model discloses a staple bolt 3 lock solid mode, insulating casing 1 is formed by detachable upper casing 11 and lower casing 12 combination, and the last casing 11 after the combination is held tightly through a staple bolt 3 respectively with the both ends of casing 12 and is fixed upper casing 11 and lower casing 12.

Referring to fig. 1 and 2, when the utility model is assembled, the power line of the complete electric tool is cut into two sections, the broken part of the power line is stripped, two anchor ears 3 are respectively sleeved on the two sections of power lines, then the conductors of the two sections of power lines are respectively inserted into two pressing type connecting terminals 21 of an overvoltage protection circuit board 2, the conductor of the power line is pressed and fixed, the two sections of power lines are respectively clamped on the line clamp 13 and fixed, the upper shell 11 and the lower shell 12 are sleeved on the overvoltage protection circuit board 2 which is connected with the power line to form the overvoltage protection circuit board, finally, two anchor ears 3 which are sleeved with the power lines in advance are respectively sleeved at two ends of the upper shell 11 and the lower shell 12, the upper shell 11 and the lower shell 12 are tightly held and fixed, therefore, the installation of the overvoltage protector on the power line of the electric tool is realized, and, do not use the screw in the design, lock through staple bolt 3, make the installation become simple, bare-handed can change.

Referring to fig. 2 and 3, the overvoltage protection circuit board 2 of the present invention includes a fuse, a bidirectional voltage-sensitive diode, a bidirectional thyristor, a two-color indicator light, and a current-limiting resistor, wherein the two-color indicator light extends to the outside of the insulating housing 1. Under normal conditions, the power supply is switched on, and the double-color indicator lamp lights up a green lamp to indicate normal. When an overhigh power supply is input, the bidirectional voltage-sensitive diode triggers the bidirectional silicon controlled rectifier to form an output short circuit, the protective tube is burnt out, and the indicator light is red to indicate disconnection.

More specifically, as shown in fig. 3, P1 and P2 are terminals for pressing, P1 is connected to the power supply end of the power cord, P2 is connected to the power utilization end of the power cord, D1 is a two-color indicator, D2 is a two-way voltage-sensitive diode, Q1 is a two-way thyristor, F1 is a fuse, and R1, R2, R3 and R4 are all current-limiting resistors. The utility model discloses during the use, under the normal condition, Q1, D2 all do not switch on, and the protective tube F1 route, R3 do not have the current, and R2 has the electric current, and D1 lights through R2, and the colour is green. When an overvoltage event occurs, the bidirectional voltage-sensitive diode D2 is conducted, the bidirectional thyristor Q1 is triggered to conduct, the fuse tube F1 and the bidirectional thyristor Q1 form a loop, the fuse tube F1 is fused by extremely high current, R3 has current under the load action of Q1 or a power end, R2 has no current, and D1 is lightened through R3 and is red in color.

The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.

Claims

1. The utility model provides an insert brushless electric tool overvoltage protector which characterized in that: the overvoltage protector is arranged on a power line of the electric tool and comprises an insulating shell, an overvoltage protection circuit board is arranged in the insulating shell, two ends of the overvoltage protection circuit board are respectively provided with a wiring terminal used for being connected with the power line of the electric tool, and through holes used for the power line to pass through are respectively arranged at two ends of the insulating shell.

2. An overvoltage protector for a plug-in brushless power tool according to claim 1, wherein: the insulation housing is formed by combining a detachable upper housing and a detachable lower housing, and the two ends of the combined upper housing and the two ends of the combined lower housing are respectively and tightly held and fixed by a hoop.

3. An overvoltage protector for a plug-in brushless power tool according to claim 1, wherein: the wiring terminal is a pressing type wiring terminal.

4. An overvoltage protector for a plug-in brushless power tool according to claim 1, wherein: and a wire clamp is respectively arranged in the two ends of the insulating shell.

5. An overvoltage protector for a plug-in brushless power tool according to claim 1, wherein: the overvoltage protection circuit board comprises a protective tube, a bidirectional voltage-sensitive diode, a bidirectional thyristor, a double-color indicator light and a current-limiting resistor, wherein the double-color indicator light extends out of the insulating shell.