Power supply conversion module of electric tool

Abstract

The utility model belongs to the technical field of lithium-battery electric tools, in particular to a conversion power supply module of an electric tool, which is characterized in that a mains supply input socket and a conversion power supply circuit board are additionally arranged on the lithium-battery electric tool through improvement and upgrading, and a charging circuit unit is arranged on the conversion power supply circuit board; the conversion power supply circuit board is further provided with a step-down circuit unit electrically connected with the mains supply input socket, the output end of the battery is electrically connected with a voltage stabilizing circuit unit through a relay, the relay is in an off state when the mains supply is inserted for power supply, the relay is in an on state when the mains supply is pulled out, and the relay is in an on state when the mains supply is powered. The battery stops supplying power to the electric tool, the mains supply is preferentially used, and the electric tool is supplied with power through the battery under the condition of no mains supply, so that a more flexible power supply mode is provided, the power is preferentially stored for the battery, the electric tool can switch the corresponding power supply mode in different use scenes, and the use flexibility of the power supply tool is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric tool technical field, concretely relates to a kind of electric tool conversion power supply module. BACKGROUND

[0002] Various electric tools such as electric drill, electric grab, electric saw, electric hammer, cutting machine are widely used in engineering operation, and the current electric tools mainly have two power supply modes, one of which is directly powered by mains, which is suitable for use in places with mains power supply, and the other power supply mode is powered by battery, which is suitable for use in places without mains power supply. The electric tools of the two power supply modes each have certain deficiencies, among which, if mains power supply is used, the use scenario of the electric tool is limited, and it is not convenient to use in places without mains power supply; if battery power supply is used, the use duration of the electric tool is limited, and the battery power supply capacity is not as good as mains. INVENTION CONTENTS

[0003] The utility model aims at providing a kind of electric tool conversion power supply module, to realize flexible power supply for electric tool by the electric tool conversion power supply module, and ensure that mains power supply is prior, to save battery capacity.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Provide a kind of electric tool conversion power supply module, the electric tool conversion power supply module is set in electric tool, it includes mains input socket, battery and conversion power supply circuit board, the conversion power supply circuit board is equipped with charging circuit unit, the mains input socket, charging circuit unit and battery are sequentially electrically connected, to be used for charging the battery;

[0006] Voltage reduction circuit unit electrically connected with the mains input socket is also provided on the conversion power supply circuit board, and the voltage reduction circuit unit is used to be electrically connected to electric tool motor, to convert mains into the direct current low voltage required by electric tool motor;

[0007] The output end of the battery is electrically connected with voltage stabilizing circuit unit through relay, and the voltage stabilizing circuit unit is used to be electrically connected to electric tool motor, to convert battery output voltage into the direct current low voltage required by electric tool motor.

[0008] Preferably, the electric tool conversion power supply module is provided with a manual switch, and the output end of the voltage stabilizing circuit unit and the output end of the voltage reduction circuit unit are electrically connected to electric tool motor through the manual switch.

[0009] Compared with the prior art, the electric tool conversion power supply module has the advantages that the conversion power supply circuit board is arranged, under the condition of mains power supply, the battery is controlled to stop supplying power to the electric tool, mains power is preferentially used, under the condition of no mains power supply, the battery supplies power to the electric tool, therefore, the power supply mode is more flexible, the battery power is preferentially preserved, the electric tool can switch the corresponding power supply mode under different use scenarios, the use flexibility of the power supply tool is improved, the lithium battery electric tool is provided with the function of being able to be used by using mains power, the lithium battery tool is a dual-function integrated machine. BRIEF DESCRIPTION OF DRAWINGS

[0010] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0011] Figure 1 It is a circuit block diagram of the conversion power supply circuit board in the electric tool conversion power supply module embodiment of the present application.

[0012] Figure 2 It is a structural schematic view of a drill containing the electric tool conversion power supply module of the present application.

[0013] Figure 3 It is a structural schematic view of a cutting saw containing the electric tool conversion power supply module of the present application.

[0014] Figure 4 It is a structural schematic view of a chain saw containing the electric tool conversion power supply module of the present application.

[0015] In the drawings, each reference numeral represents: an electric tool 1, a battery 2, a charging circuit unit 4, a voltage reduction circuit unit 5, an electric tool power supply interface 6, a relay 7, a voltage stabilization circuit unit 8, a manual switch 9. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0017] In one embodiment, an electric tool conversion power supply module is provided, such as Figures 1-2As shown, the power tool conversion power supply module is arranged in the power tool 1, including a mains input socket, a battery 2 and a conversion power supply circuit board, wherein the mains input socket is arranged on the shell of the power tool, and the mains input socket is used to connect the mains power supply to the power tool. The battery 2 is a lithium battery pack arranged inside the power tool, which is used to power the power tool in an environment without mains power supply. In addition, the conversion power supply circuit board is also provided in the power tool 1, and the mains input socket is located on the conversion power supply circuit board. One of the functions of the conversion power supply circuit board is to convert the voltage output by the battery 2 and the mains into a voltage suitable for the power tool. Another function is to switch the power supply between the battery 2 and the mains. When the mains is connected, the battery 2 stops supplying power to the power tool, and the mains is used preferentially. When there is no mains, the battery 2 supplies power to the power tool.

[0018] Specifically, a charging circuit unit 4 is arranged on the conversion power supply circuit board, and the mains input socket, the charging circuit unit 4 and the battery 2 are sequentially electrically connected to charge the battery 2. The charging circuit unit 4 corresponds to the function of a charger, which is used to convert the mains into stable direct current with a size matching the charging voltage of the battery 2. The charging circuit unit 4 includes a voltage conversion circuit and a rectifier circuit. The voltage conversion circuit converts the high voltage of the mains into a low voltage suitable for charging. The rectifier circuit converts alternating current into direct current to charge the battery 2.

[0019] A voltage reduction circuit unit 5 is also arranged on the conversion power supply circuit board and electrically connected to the mains input socket. The voltage reduction circuit unit 5 is used to convert the mains into direct current low voltage required by the power tool, that is, to directly supply power to the power tool through the voltage reduction circuit unit 5. The size of the voltage output by the voltage reduction circuit unit 5 is set according to the power demand of the power tool. For example, if the working voltage of the motor of the power tool is 48V, the voltage reduction circuit unit 5 is a voltage reduction circuit with an output voltage of 48V. The output end of the voltage reduction circuit unit 5 is electrically connected to the motor 6 inside the power tool 1, which is used to supply power to the motor 6 of the power tool.

[0020] The output end of the battery 2 is electrically connected to a voltage stabilizing circuit unit 8 through a relay 7. The voltage stabilizing circuit unit 8 is used to convert the output voltage of the battery 2 into direct current low voltage required by the power tool. The size of the voltage output by the voltage stabilizing circuit unit 8 is set according to the power demand of the power tool. For example, if the working voltage of the motor of the power tool is 48V, the voltage stabilizing circuit unit 8 is a circuit with an output voltage of 48V. The output end of the voltage stabilizing circuit unit 8 is electrically connected to the motor 6. The relay 7 is a normally closed relay, and the control coil of the relay 7 can be supplied with power by the voltage reduction circuit unit 5. The working voltage of the coil of the relay 7 matches the output voltage of the voltage reduction circuit unit 5. For example, if the voltage reduction circuit unit 5 outputs a voltage of 48V, the relay 7 adopts a model with a coil operating voltage of 48V.

[0021] Further, in another embodiment, in combination with Figure 1 As shown, the electric tool conversion power supply module is provided with a manual switch 9, and the output end of the voltage stabilizing circuit unit 8 and the output end of the voltage reducing circuit unit 5 are electrically connected to the electric tool motor 6 through the manual switch 9.

[0022] The electric tool conversion power supply module can be integrally arranged in a drill, a cutting saw, a chain saw or the like electric tool.

[0023] The use mode of the electric tool conversion power supply module is as follows: (1) in the case that the power input socket is not connected to the power supply, the relay 7 is in the closed state, and the battery 2 supplies power to the electric tool motor 6 through the relay 7, the voltage stabilizing circuit unit 8 and the manual switch 9; (2) in the case that the power input socket is connected to the power supply, the inserted power supply is supplied to the electric tool motor 6 through the voltage reducing circuit unit 5 and the manual switch 9, and the battery 2 is charged through the charging circuit unit 4, and the relay is in the open state.

[0024] Based on the above embodiment, it can be known that the utility model belongs to the technical field of lithium battery electric tools, and the lithium battery electric tool is provided with the function of using the power supply, the dual functions are integrated, the lithium battery electric tool is improved and upgraded, the power input socket and the conversion power supply circuit board are added, the electric tool conversion power supply module is provided with the conversion power supply circuit board, the battery 2 stops supplying power to the electric tool in the case of the power supply, the power supply is preferentially used, the battery 2 is preferentially charged in the case that there is no power supply, the electric tool is supplied with power through the battery 2, therefore, the power supply mode is more flexible, the battery 2 is preferentially charged, and the electric tool can switch the corresponding power supply mode in different use scenarios, and the use flexibility of the power supply tool is improved.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A power tool conversion power supply module, characterized by: The power conversion module of the electric tool is arranged in the electric tool, which comprises a commercial power input socket, a battery and a power conversion circuit board, the power conversion circuit board is provided with a charging circuit unit, the commercial power input socket, the charging circuit unit and the battery are sequentially electrically connected to charge the battery; The power conversion circuit board is further provided with a voltage reduction circuit unit electrically connected with the commercial power input socket, the voltage reduction circuit unit is used to be electrically connected to the motor of the electric tool to convert the commercial power into the required direct current low voltage of the motor of the electric tool; The output end of the battery is electrically connected with a voltage stabilizing circuit unit through a relay, the voltage stabilizing circuit unit is used to be electrically connected to the motor of the electric tool to convert the output voltage of the battery into the required direct current low voltage of the motor of the electric tool; The power conversion module of the electric tool is provided with a manual switch, the output end of the voltage stabilizing circuit unit and the output end of the voltage reduction circuit unit are electrically connected to the motor of the electric tool through the manual switch; The charging circuit unit comprises a voltage transformation circuit and a rectifier circuit, the voltage transformation circuit converts the high voltage of the commercial power into the low voltage suitable for charging, and the rectifier circuit converts the alternating current into the direct current to charge the battery; The relay is a normally closed relay, the control coil of the relay is powered by the voltage reduction circuit unit, and the working voltage of the coil of the relay is matched with the output voltage of the voltage reduction circuit unit.

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