CN217087054U - Power cord and AC electric tool - Google Patents

Abstract

The application provides the power line, which comprises a capacitor and a capacitor shell, wherein the capacitor is arranged in the capacitor shell; and the capacitor is arranged in the middle of the power line and is electrically connected with the power line. Through set up electric capacity on the power cord, electric capacity need not to set up the inside at electric tool like this, not only can reduce the inside problem of generating heat of electric tool, can also conveniently change electric capacity when electric tool needs maintenance electric capacity, only change electric capacity can. Furthermore, the electric tool matched with the power line with the structure can be matched with capacitors with different specifications according to needs, and the requirements of electric tools with different powers are met, so that the cost is saved.

Description

Power cord and AC electric tool

Technical Field

The invention relates to the technical field of electric tools, in particular to a power cord of a screwdriver and an alternating current electric tool.

Background

The electric tools using brushless motors as power are more and more on the market at present, the motors have a common characteristic and need to be provided with electrolytic capacitors: for example, taking a tool with a nominal input of about 1000W as an example, the motor is matched with an electrolytic capacitor with a size of about 400V/500 uF (we refer to as large capacitor), and the electrolytic capacitor with a size of about 400V 20uF (we refer to as no capacitor), and the electrolytic capacitor with a size of only 10 mm 15mm (we refer to as no capacitor); and the capacitance capacity is required to be larger when the rated power is larger, and the corresponding volume is also larger. The large electrolytic capacitor can make the voltage at the output end of the controller more stable, so that the voltage of the electric tool is more stable in a load state, namely, the motor with the same volume has larger load power of the large capacitor than that of the motor without the capacitor.

This type of new electric tool is currently marketed: although the capacitor-free scheme is small in size and can be placed in a shell or a handle of the electric tool, the size of the capacitor is reduced, but the size of the motor is increased and the weight of the motor is increased to achieve the actual using load of the electric tool, so that the handheld electric tool is obviously not in line with market requirements and trends, and when the input voltage is unstable, the damage probability of the capacitor is much higher, so that the scheme is not repeated. And the fact that a capacitor with the diameter of 30 mm or more and the diameter of 55mm or more is arranged in the shell or the handle of the electric tool can also lead the volume of the tool to be larger, influence the hand feeling of holding, and obviously not meet the market requirements and the development trend of the tool. And the capacitor is arranged inside the electric tool: electricity generates heat easily, has increased electric tool's whole calorific capacity, brings higher challenge for electric tool's heat dissipation, and the probability that the stacking electric capacity based on electric capacity self poor and random vibration takes place to damage also increases. When the capacitor is damaged and repaired, the capacitor can be replaced only by disassembling the electric tool, so that the replacement is very inconvenient.

Disclosure of Invention

The invention aims to provide a power cord to solve the technical problems that a capacitor needs to be arranged in an existing electric tool, so that the inside of a shell of the electric tool generates heat, and the capacitor needs to be replaced inconveniently.

In order to achieve the above object, the present application provides a power cord, which includes a capacitor and a capacitor housing, wherein the capacitor is disposed in the capacitor housing; and the capacitor is arranged in the middle of the power line and is electrically connected with the power line.

Optionally, in the power line, the power line is fixedly connected to the capacitor case, and the power line has a first connection end located on an inner wall of the capacitor case.

Optionally, in the power line, the capacitor is detachably connected to the housing, and the capacitor has a second connection terminal in contact connection with the first connection terminal.

Optionally, in the power line, the power line is fixedly connected to the capacitor housing, and the power line has a first connection terminal located inside the capacitor housing.

Optionally, in the power line, the capacitor has a second connection tab soldered to the first connection tab.

Optionally, in the power line, the power line is detachably connected to the capacitor case.

Optionally, in the power line, the capacitor is fixedly connected to the capacitor housing, the capacitor housing is provided with a jack, the power line is provided with a plug, and the jack is connected to the plug.

On the other hand, this application has still included an alternating current electric tool, including foretell power cord and tool body, the power cord with tool body is plug connection.

In another aspect, the present application further includes an ac power tool including the power cord and a tool body, wherein the power cord is integrally connected to the tool body.

Optionally, in the ac power tool, the ac power tool is an angle grinder.

Compared with the prior art, the power line comprises a capacitor and a capacitor shell, wherein the capacitor is arranged in the capacitor shell; and the capacitor is arranged in the middle of the power line and is electrically connected with the power line. Through set up electric capacity on the power cord, electric capacity need not to set up the inside at electric tool like this, not only can reduce the inside problem of generating heat of electric tool, can also conveniently change electric capacity when electric tool needs maintenance electric capacity, only change electric capacity can. Furthermore, the electric tool matched with the power line with the structure can be matched with capacitors with different specifications according to needs, and the requirements of electric tools with different powers are met, so that the cost is saved.

Drawings

Fig. 1 is a schematic structural diagram of a power line provided in an embodiment of the present application;

fig. 2 is an exploded view of a power line structure provided in an embodiment of the present application;

fig. 3 is an exploded view of another power line structure provided in the embodiments of the present application;

FIG. 4 is an exploded view of yet another power line structure provided by an embodiment of the present application;

fig. 5 is a schematic structural diagram of another power line provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of an angle grinder provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another angle grinder provided in an embodiment of the present application;

wherein the reference numerals of figures 1 to 7 are as follows:

10-a power line; 11-a first connection lug; 12-a first connection end; 13-a plug; 20-capacitance; 21-a second connection lug; 22-a second connection end; 30-a capacitor case; 31-a jack; a 40-angle grinder; 41-a tool body; 411-tool housing; 411 a-air inlet; 411 b-air outlet; 412-a motor; 413-a gear assembly; 414-controller component.

Detailed Description

To make the objects, advantages and features of the present invention more apparent, the power cord and the ac power tool according to the present invention will be described in further detail with reference to fig. 1 to 7. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-5, the present application provides a power cord 10, where the power cord 10 includes a capacitor 20 and a capacitor housing 30, and the capacitor 20 is disposed in the capacitor housing 30; the capacitor 20 is disposed in the middle of the power line 10 and electrically connected to the power line 10.

By providing the capacitor 20 on the power cord 10, the capacitor 20 does not need to be provided inside the electric power tool, which not only reduces the problem of heat generation inside the electric power tool, but also facilitates replacement of the capacitor 20 when the electric power tool needs to maintain the capacitor 20, and only the capacitor 20 needs to be replaced. Furthermore, the electric tool matched with the power line 10 with the structure can be matched with the capacitors 20 with different specifications according to needs, so that the requirements of the electric tools with different powers are met, and the cost is saved.

Referring to fig. 2, in one embodiment, the power line 10 is fixedly connected to the capacitor casing 30, and the power line 10 has a first connection end 12, and the first connection end 12 is located on an inner wall of the capacitor casing 30. The capacitor 20 is detachably connected to the housing, and the capacitor 20 has a second connection 22, the second connection 22 being in contact with the first connection 12. Therefore, since the power line 10 is fixedly connected with the capacitor casing 30, the fixed connection here can be understood as that the power line 10 and the capacitor casing 30 are integrally formed, so that the connection stability can be ensured, and frequent plugging and unplugging does not easily cause the failure of the first connection end 12 when the capacitor 20 is replaced.

Referring next to fig. 3, in a further embodiment, the power line 10 is fixedly connected to the capacitor housing 30, and the power line 10 has a first connection terminal 11, and the first connection terminal 11 is located inside the capacitor housing 30. The capacitor 20 has a second terminal 21, the second terminal 21 being soldered to the first terminal 11. That is, one end of the power line 10 is threaded into the capacitor housing 30, and the welding joint between the second terminal of the capacitor 20 and the first terminal is located inside the capacitor housing 30, so that the welding can ensure the connection stability between the capacitor 20 and the power line 10, and meanwhile, the welding joint is located inside the capacitor housing 30 to ensure the welding stability.

As can be seen from fig. 2 and 4, the capacitor housing 30 may be formed by two parts that can be opened and closed in a radial direction of the capacitor 20, or may be formed by two parts that can be opened and closed in an axial direction of the capacitor 20, which is not limited herein.

Referring next to fig. 5, in a preferred embodiment, the power cord 10 is detachably connected to the capacitor housing 30. The capacitor 20 is fixedly connected with the capacitor shell 30, a jack 31 is arranged on the capacitor shell 30, a plug 13 is arranged on the power line 10, and the jack 31 is connected with the plug 13. Therefore, only the power line 10 or the capacitor 20 needs to be replaced independently whether the power line 10 needs to be replaced or the capacitor 20 needs to be replaced, and maintenance cost can be saved.

Referring to fig. 6, on the other hand, the present application further includes an ac electric tool, which includes the power cord 10 and the tool body 41, wherein the power cord 10 is connected to the tool body 41 in a plug-in manner.

Taking the ac electric tool as an example of the angle grinder 40, specifically, the angle grinder 40 includes a tool body 41, the tool body 41 includes a tool housing 411, the tool housing 411 is provided with an air inlet 411a and an air outlet 411b, the tool housing 411 is further provided with a cable socket, the tool housing 411 is internally provided with a motor 412, a gear transmission assembly 413 and a controller assembly 414.

The power cord 10 is further provided with a plug 13 connected with the angle grinder 40, specifically, the power cord 10 is a four-core wire (including two capacitor 20 lead wires), wherein the capacitor 20 and the capacitor housing 30 can be of an integral structure and cannot be disassembled, the capacitor housing 30 and cables on two sides and the capacitor 20 in the capacitor housing 30 are integrally formed by injection molding, the capacitor 20 is damaged and directly replaced by a whole assembly, and the structure is characterized by being very simple and convenient and not wasting working hours.

Of course, the power line 10 and the capacitor housing 30 may be in a split structure, the plug 13 of the power line 10 connected to the capacitor 20 is connected to two wires of the power line 10 and the capacitor 20, the other two wires are connected to the power line 10, the wires are fixed in the capacitor housing 30 through a wire pressing plate, and the capacitor housing 30 is covered to protect the connection node between the wires and the capacitor 20. The assembled structure can be matched with the capacitors 20 with different specifications according to needs, and the requirements of different power machine types are met. When the capacitor 20 is damaged and fails, only the capacitor 20 is replaced, so that the cost can be saved.

Referring to fig. 7, in yet another aspect, the present application further includes an ac electric tool, which includes the power cord 10 and a tool body 41, wherein the power cord 10 is integrally connected to the tool body 41.

Similarly, taking the ac electric tool as an angle grinder 40 as an example, the specific structure of the angle grinder 40 is as above except that the power cord 10 is integrally connected with the tool body 41, and the details of the other structures are not repeated herein, and the power cord 10 and the capacitor case 30 are an integral structure. The capacitor case 30 includes a case cover. Four elastic buckles are arranged in the shell cover, and the two elastic buckles are the same in size. During installation, two pins on the capacitor 20 are arranged in corresponding inserting buckles, the lead wires of the capacitor shell 30 are connected with the plug 13 and then arranged in corresponding inserting buckles, and the capacitor shell 30 and the shell cover are closed. The connection method of the capacitor case 30 and the case cover is not limited to the socket type connection, the screw connection, and the like. The scheme has moderate manufacturing cost, low maintenance cost and simple and convenient maintenance and replacement.

In summary, the power cord 10 including the capacitor 20 is always adopted in the electric power tool, so that the capacitor 20 does not need to be arranged inside the electric power tool, the problem of heat generation inside the electric power tool can be reduced, and the capacitor 20 can be conveniently replaced when the electric power tool needs to maintain the capacitor 20, and only the capacitor 20 needs to be replaced. It is also possible to solve the problem that the large capacitor 20 is built in the tool case 411 to cause an increase in the internal space. Furthermore, the electric tool matched with the power line 10 with the structure can be matched with the capacitors 20 with different specifications according to needs, so that the requirements of the electric tools with different powers are met, and the cost is saved.

The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.

Claims (10)

1. A power cord is characterized in that the power cord comprises a capacitor and a capacitor shell, wherein the capacitor is arranged in the capacitor shell; and the capacitor is arranged in the middle of the power line and is electrically connected with the power line.

2. The electrical power cord as set forth in claim 1, wherein said electrical power cord is fixedly connected to said capacitor case, and wherein said electrical power cord has a first connection end located on an inner wall of said capacitor case.

3. The electrical power cord as set forth in claim 2, wherein said capacitor is removably connected to said housing, and wherein said capacitor has a second connection end in contact with said first connection end.

4. The power cord as set forth in claim 1, wherein said power cord is fixedly connected to said capacitor housing and wherein said power cord has a first connection tab, said first connection tab being located inside said capacitor housing.

5. The electrical power cord as set forth in claim 4, wherein said capacitor has a second connection tab, said second connection tab being soldered to said first connection tab.

6. The electrical power cord as set forth in claim 1, wherein said electrical power cord is removably connected to said capacitive housing.

7. The power cord of claim 6, wherein the capacitor is fixedly connected to the capacitor housing, the capacitor housing is provided with a jack, the power cord is provided with a plug, and the jack is connected to the plug.

8. An alternating current electric tool, characterized by comprising the power cord as claimed in any one of claims 1 to 7 and a tool body, wherein the power cord is connected with the tool body in a plugging manner.

9. An alternating current electric power tool comprising the power cord as claimed in any one of claims 1 to 7 and a tool body, wherein the power cord is integrally connected to the tool body.

10. The ac power tool of claim 8 or 9, wherein the ac power tool is an angle grinder.

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