WO2019134312A1

WO2019134312A1 - Electric tool set

Info

Publication number: WO2019134312A1
Application number: PCT/CN2018/085406
Authority: WO
Inventors: 任杰; 张月祥
Original assignee: 南京德朔实业有限公司
Priority date: 2018-01-04
Filing date: 2018-05-03
Publication date: 2019-07-11

Abstract

Disclosed is an electric tool set, comprising a first device and a second device. The first device comprises a positive terminal. The second device comprises a negative terminal. The positive terminal comprises a first flat plate part and a second flat plate part provided at intervals. The negative terminal comprises a first elastic plate part and a second elastic plate part provided at intervals. When the positive terminal is fitted to the negative terminal, the first flat plate part is in contact with the first elastic plate part, and the second flat plate part is in contact with the second elastic plate part. By configuring the negative terminal comprising the first elastic plate part and the second elastic plate part, and the positive terminal comprising the first flat plate part and the second flat plate part, the contact area where the positive terminal is fitted to the negative terminal can be increased, the current passing through a contact portion is reduced, the contact stability of the positive terminal and the negative terminal is improved, and problems of bad contact and excessive temperature raising of the contact portion of the positive terminal and the negative terminal in large current operating conditions are solved.

Description

Electric tool combination

Technical field

The present disclosure relates to the field of power tools, and in particular to a power tool combination.

Background technique

As the power demand of power tools is increasing, the battery pack is used as an energy source for DC power tools, and its output current demand is also increasing. Under high current conditions, if the contact resistance of the terminal structure that electrically connects the battery pack to the power tool is too large or poorly contacted, it not only affects the user experience, but also causes the temperature rise of the battery pack and the power tool to be excessively high, damaging the battery. The package housing and the power tool housing also cause electrical corrosion of the connection terminals.

Summary of the invention

In order to solve the deficiencies of the prior art, an object of the present disclosure is to provide a power tool combination, which can solve the problem of poor contact of the contact portion and excessive temperature rise when the connection terminals of the power tool combination are in contact under a large current condition.

In order to achieve the above object, the present disclosure adopts the following technical solution: a power tool combination including a first device and a second device, the first device including a male terminal, and the second device including a female terminal, wherein the male terminal includes a space a first flat plate portion and a second flat plate portion; the female terminal includes a first elastic plate portion and a second elastic plate portion that are spaced apart; when the male terminal and the female terminal are butted, the first flat plate portion is in contact with the first elastic plate portion The second flat plate portion is in contact with the second elastic plate portion.

Further, the first flat plate portion and the second flat plate portion of the male terminal are connected to each other; the first elastic plate portion and the second elastic plate portion of the female terminal are connected to each other.

Further, the female terminal includes a support plate, and the first elastic plate portion and the second elastic plate portion are adjacently disposed on the left and right sides of the support plate, and the support plate is for supporting the first elastic plate portion and the second elastic plate unit.

Further, the support plate includes a first support portion, a second support portion, a third support portion, a fourth support portion, and a first connecting portion, a second connecting portion, and a third connecting portion; the first elastic plate portion includes a left side elastic portion a plate portion and a right elastic plate portion, the left elastic plate portion of the first elastic plate portion is horizontally supported on the first support portion, and the right elastic plate portion of the first elastic plate portion is horizontally supported on the second support portion The second elastic plate portion includes a left elastic plate portion and a right elastic plate portion, and the left elastic plate portion of the second elastic plate portion is horizontally supported on the third support portion, and the right elastic plate of the second elastic plate portion The portion is horizontally supported on the fourth support portion; the first connection portion connects the first support portion and the second support portion, the second connection portion connects the second support portion and the third support portion, and the third connection portion is connected to the third portion a support portion and a fourth support portion.

Further, the first connecting portion connects the upper portions of the first supporting portion and the second supporting portion, the second connecting portion connects the lower portions of the second supporting portion and the third supporting portion, and the third connecting portion connects the third supporting portion and the fourth supporting portion The upper portion of the portion, the lower portion of the first support portion and the lower portion of the fourth support portion are provided with fixing legs for fixing the support plate to the other support plate.

Further, a male terminal and a female terminal are provided for the power supply terminal.

Further, the first device is a power tool and the second device is a battery pack.

Further, the first device is a battery pack and the second device is a power tool.

Further, the first device is a charger and the second device is a battery pack.

Further, the first device is a battery pack and the second device is a charger.

Another power tool combination includes a first device and a second device, the first device includes a male terminal, and the second device includes a female terminal, wherein the male terminal includes a first flat portion and a second flat portion; the female terminal includes a first pair of elastic plate portions and a second pair of elastic plate portions; when the male terminal and the female terminal are butted, the first flat plate portion is inserted between the first pair of elastic plate portions to be in contact with the first pair of elastic plate portions, and the second The flat plate portion is inserted between the second pair of elastic plate portions to be in contact with the second pair of elastic plate portions.

The present disclosure is advantageous in that by providing a female terminal having a first elastic plate portion and a second elastic plate portion and a male terminal having the first flat plate portion and the second flat plate portion, it is possible to increase the abutment between the male terminal and the female terminal The contact area reduces the current flowing through the contact portion, improves the contact stability between the male terminal and the female terminal, and can solve the problem that the contact between the male terminal and the female terminal is poorly contacted and the temperature rise is too high under a large current operation condition.

DRAWINGS

Figure 1 is a power tool combination;

Figure 2-4 is a schematic view showing the connection of the male terminal and the female terminal in three directions;

Figure 5 is a perspective view of the power tool;

Figure 6 is a perspective view of the battery pack.

Detailed ways

The present disclosure will be specifically described below in conjunction with the drawings and specific embodiments.

Referring to FIG. 1, the power tool combination includes a first device 100 and a second device 200, and the first device 100 and the second device 200 can be used together. In the present embodiment, the first device 100 is a power tool and the second device 200 is a battery pack. It can be understood that the first device 100 can be a battery pack and the second device 200 can be a power tool. Alternatively, the first device 100 is a charger, the second device 200 is a battery pack, or the first device 100 is a battery pack, and the second device 200 is a charger.

Referring to FIGS. 2 to 4, the first device 100 has a male terminal 10, and the second device 200 has a female terminal 20. When the second device 200 is engaged with the first device 100, the female terminal 20 is in contact with the male terminal 10 to provide Electrical connection between the first device 100 and the second device 200.

Generally, the female terminal 20 includes an elastic plate portion, and the male terminal 10 includes a flat plate portion, and the flat plate portion of the male terminal 10 can be inserted between the elastic plate portions of the female terminal 20, thereby achieving a contact connection of the female terminal 20 with the male terminal 10. When the female terminal 20 is in contact with the male terminal 10 under a large current condition, the current flowing through the contact portion is excessively large, which may cause the temperature rise of the contact portion to be too high. For this reason, a plurality of sets of mutually matching elastic plate portions and flat plate portions can be added to increase the contact area of the male terminal 10 and the female terminal 20, thereby reducing the current flowing through the contact portion.

Referring to FIGS. 2 to 4, the female terminal 20 includes a first elastic plate portion 21 and a second elastic plate portion 22, and the male terminal 10 includes a first flat plate portion 11 and a second flat plate portion 12.

The first elastic plate portion 21 of the female terminal 20 includes a left elastic plate portion 211 and a right elastic plate portion 212, and the left elastic plate portion 211 and the right elastic plate portion 212 are disposed at the same height and are parallel to each other, that is, the left side The elastic plate portion 211 and the right elastic plate portion 212 are symmetrical with respect to the insertion center line of the first flat plate portion 11 of the male terminal 10, that is, the left elastic plate portion 211 of the first elastic plate portion 21 and the right elastic plate portion 212 are opposed to each other. Symmetrical to the first insertion centerline x1.

The second elastic plate portion 22 of the female terminal 20 includes a left elastic plate portion 221 and a right elastic plate portion 222, and the left elastic plate portion 221 and the right elastic plate portion 222 are disposed at the same height and are parallel to each other, that is, the left side The elastic plate portion 221 and the right elastic plate portion 222 are symmetric with respect to the insertion center line of the second flat plate portion 12 of the male terminal 10, that is, the left elastic plate portion 221 and the right elastic plate portion 222 of the second elastic plate portion 21 are opposed to each other. Symmetrical to the second insertion centerline x2.

The left elastic plate portion 211 and the right elastic plate portion 212 of the first elastic plate portion 21 and the left elastic plate portion 221 and the right elastic plate portion 222 of the second elastic plate portion 22 can be bent into the first portion of the male terminal 10 The insertion of the flat plate portion 11 and the second flat plate portion 12 between the left and right elastic half portions produces a shape in which the elastic force of the flat plate portion is pressed, for example, the left

elastic plate portions

211, 221 and the right

elastic plate portions

221, 222 are bent into Tulip shape or plum shape.

The first elastic plate portion 21 and the second elastic plate portion 22 of the female terminal are supported by the support plate 23, and are disposed adjacent to the left and right sides of the support plate, the first elastic plate portion 21 and the second elastic plate portion 22 Connected to each other. The support plate 23 is configured to facilitate supporting and connecting the shapes of the first elastic plate portion 21 and the second elastic plate portion 22 while satisfying the size requirements of the battery pack.

In one embodiment, the support plate 23 is configured to resemble an M shape or a concave shape.

Specifically, the support plate 23 includes a first support portion 231 , a second support portion 233 , a third support portion 235 , a fourth support portion 237 , and a first connection portion 232 , a second connection portion 234 , and a third connection portion 236 . Each support portion is for supporting one elastic plate portion, and each connection portion is for connecting the two support portions.

Specifically, the first support portion 231 supports the left elastic plate portion 211 of the first elastic plate portion 21, and the second support portion 233 supports the right elastic plate portion 212 of the first elastic plate portion 21, and the third support portion 235 supports The left elastic plate portion 221 of the second elastic plate portion 22 and the fourth support portion 237 support the right elastic plate portion 222 of the second elastic plate portion 22. The first connecting portion 232 connects the first supporting portion 231 and the second supporting portion 233, that is, the left elastic plate portion 211 and the right elastic plate portion 212 of the first elastic plate portion 21, and the second connecting portion 234 is used for connecting the first connecting portion 234. The second support portion 233 and the third support portion 235 are connected to the right elastic plate portion 212 of the first elastic plate portion 21 and the left elastic plate portion 221 of the second elastic plate portion 22, and the third connection portion 236 is connected to the third support portion. The portion 235 and the fourth support portion 237 connect the left elastic plate portion 221 and the right elastic plate portion 222 of the second elastic plate portion 22.

The first support portion 231 and the second support portion 233 are symmetrically arranged on the left and right sides of the first insertion center line x1, and the third support portion 235 and the fourth support portion 237 are symmetrically arranged on the left side of the second insertion center line x2 And the right side. The first support portion 231, the second support portion 233, the third support portion 235, and the fourth support portion 237 are parallel to each other in the vertical direction.

The first connecting portion 232 connects the upper portions of the first supporting portion 231 and the second supporting portion 233, the second connecting portion 234 connects the lower portions of the second supporting portion 233 and the third supporting portion 235, and the third connecting portion 236 connects the third supporting portion 235 and an upper portion of the fourth support portion 237. Fixing legs are provided at lower portions of the first support portion 231 and the fourth support portion 237, so that the support portions 23 connected to the respective support portions and the connection portions connected to each other can be fixed to the other support plates 24, such as the circuit board of the battery pack. .

Of course, other configurations of the support plate 23 that facilitate the support and attachment of the resilient plate portion as would be readily apparent to those skilled in the art are within the scope of the present disclosure.

The four support portions and the three connection portions of the support plate may be integrally formed of the same conductive material, and the four support portions and the three connection portions may be welded together by welding. In addition, the first elastic plate portion 21, the second elastic plate portion 22, and the support plate 23 may be integrally formed of the same conductive material, or the first elastic plate portion 21 and the second elastic plate portion 22 may be welded. Soldered to the support plate 23. The four support portions are parallel to each other and may be distributed in a line in a direction perpendicular to the insertion center of the flat plate portion of the male terminal 10, and the three connection portions are parallel to each other and perpendicular to the above-described four support portions.

The male terminal 10 includes a first flat plate portion 11 and a second flat plate portion 12, and the first flat plate portion and the second flat plate portion are connected to each other by the connecting portion 13. The first flat plate portion 11 of the male terminal 10 can be inserted between the left elastic plate portion 211 and the right elastic plate portion 212 of the first elastic plate portion 21 along the first insertion center line x1, and the second flat plate portion 12 can be along the first The second insertion center x2 is inserted between the left elastic plate portion 221 and the right elastic plate portion 222 of the second elastic plate portion 22, and the first flat plate portion is under the elastic force of the left elastic plate portion and the right elastic plate portion. 11 is in contact with the first elastic plate portion 21, and the second flat plate portion 12 and the second elastic plate portion 22 are in contact connection.

In one implementation, the connecting plate 13 connects the rear of the first flat portion 11 and the rear of the second flat portion 12, where the rear portion refers to the first flat portion 11 and the second flat portion 12 away from the female terminal in the insertion direction. Face.

In another embodiment, the connecting plate 13 connects the upper surface of the first flat portion 11 and the upper or lower surface of the second flat portion 12, where the upper and lower portions refer to the first flat portion 11 and the second flat plate in the vertical direction. Above and below.

When each of the flat plate portions is in contact with each of the pair of elastic plate portions, the temperature of the contact portion is increased due to the action of the current. For this purpose, a plurality of small holes may be provided in each of the flat plate portion and the non-contact portion of the elastic plate portion. 14, for heat dissipation.

Thus, by providing the female terminal 20 having the first elastic plate portion 21 and the second elastic plate portion 22 and the male terminal 10 having the first flat plate portion 11 and the second flat plate portion 12, the male terminal 10 and the female terminal 20 can be enlarged. The contact area at the time of docking reduces the current flowing through the contact portion, improves the contact stability between the male terminal 10 and the female terminal 20, and can solve the problem of poor contact and temperature rise of the contact portions of the male terminal 10 and the female terminal 20 under high current conditions. Too high a problem.

The female terminal 20 described above is disposed in the battery pack, and the male terminal 10 is disposed in the power tool. Of course, the female terminal 20 can also be disposed in the power tool, and the male terminal 10 is disposed in the battery pack. In addition, the female terminal 20 described above may be disposed in a battery pack, and the male terminal 10 is disposed in the charger. Of course, it is also possible that the female terminal 20 is disposed in the charger and the male terminal 10 is disposed in the battery pack.

The application of the male terminal 10 and the female terminal 20 in the battery pack and the power tool will be specifically described below.

5 and 6, the power tool includes a body having a receiving portion at least partially accommodating a battery pack, and the battery pack is detachably insertable into a housing of the power tool.

The battery pack includes a battery pack of a plurality of battery cells, a housing for accommodating a plurality of battery cells, a circuit board, and a female power supply terminal set for electrically connecting to the male power terminal block of the power tool.

The female power terminal set is electrically connected to the battery pack, and the male power terminal set is electrically connected to the power components, electronic components, and circuits of the power tool. When the battery pack is inserted into the housing of the power tool, the female power terminal set of the battery pack is electrically connected to the male power terminal set of the power tool.

The female power supply terminal group of the battery pack includes a positive female terminal 61 and a negative female terminal 62, the positive female terminal 61 is electrically connected to the positive electrode of the battery pack, and the negative female terminal 62 is electrically connected to the negative electrode of the battery pack. The positive female terminal 61 and the negative female terminal 62 each include two pairs of elastic plate portions, each pair of elastic plate portions including a left elastic plate portion and a right elastic plate portion, and the left elastic plate portion and the right elastic plate portion are disposed in parallel The same height, and the left elastic plate portion and the right elastic plate portion are symmetrical with respect to the insertion center line at the time of insertion of the flat plate portion of the male terminal 50.

Hereinafter, the female power terminal group of the battery pack will be specifically described by taking the positive female terminal 61 of the battery pack as an example.

The positive female terminal 61 of the battery pack includes a first elastic plate portion 611, a second elastic plate portion 612, and a support plate 613. The first elastic plate portion 611 and the second elastic plate portion 612 are disposed adjacent to each other on the left and right sides of the support plate 613. The first elastic plate portion 611, the second elastic plate portion 612, and the support plate 613 have a single structure.

Each of the first elastic plate portion 611 and the second elastic plate portion 612 includes a left elastic plate portion and a right elastic plate portion, and the left elastic plate portion and the right elastic plate portion are bent into a tulip shape to electrically The first flat plate portion 511 and the second flat plate portion 512 of the positive male terminal 51 of the male power supply terminal of the tool are respectively sandwiched by the first elastic plate portion 611 and the second elastic plate portion 612, so that the positive female terminal 61 of the battery pack is The positive male terminal 51 of the power tool is in contact connection.

The support plate 613 is configured to resemble a "concave" shape. Specifically, the support plate 613 includes a first support portion, a second support portion, a third support portion, a fourth support portion, and a first connecting portion, a second connecting portion, and a third connecting portion, where the structure of the support plate 613 is the same The support plate 23 described above has the same structure and will not be described again here.

The structure of the negative female terminal 62 of the battery pack is the same as that of the positive female terminal 61 of the battery pack, and will not be described again here.

The male power terminal group is disposed in the accommodating portion of the power tool, the male power terminal group includes the positive male terminal 51 and the negative male terminal 52 of the electric tool, and the power tool positive male terminal 51 and the negative male terminal 52 each include the first flat portion and the first Two flat parts.

The positive power terminal block 51 of the power tool will be specifically described below by taking the positive male terminal 51 of the power tool as an example.

The positive male terminal 51 of the electric power tool includes a first flat plate portion 511 and a second flat plate portion 512 that are electrically connected to each other, and the first flat plate portion 511 can be inserted into the left side elastic of the first elastic plate portion 611 of the positive female terminal 61 of the battery pack. Between the plate portion and the right elastic plate portion, the second flat plate portion 512 can be inserted between the left elastic plate portion and the right elastic plate portion of the second elastic plate portion 612 of the positive female terminal 61 of the battery pack.

The first flat plate portion 511 and the second flat plate portion 512 of the positive electrode male terminal 51 of the electric power tool are connected to each other by a connecting plate. The positive male terminal 51 of the power tool has the same structure as the male terminal 10 described above, and will not be described again here. The negative male terminal 52 of the power tool has the same structure as the positive male terminal 51 of the power tool, and will not be described again here.

A plurality of small holes may be provided in each of the flat plate portions of the male power source terminal group of the power tool and the non-contact portion of each of the elastic plate terminal portions of the battery pack for heat dissipation.

When the power tool is used, the battery pack is inserted into the housing of the power tool. At this time, the positive male terminal 51 and the negative male terminal 52 of the power tool are respectively in contact with the positive female terminal 61 and the negative female terminal 62 of the battery pack in the insertion direction. . Specifically, the first flat plate portion 511 and the second flat plate portion 512 of the positive electrode male terminal 51 of the electric power tool are respectively inserted into the left elastic plate portion and the right elastic plate portion of the first elastic plate portion 611 of the battery pack positive female terminal 61. Between the left elastic plate portion and the right elastic plate portion of the second elastic plate portion 612, so that the positive male terminal 51 of the power tool is in contact with the positive female terminal 61 of the battery pack, and the negative male terminal 52 of the power tool It is in contact with the negative female terminal 62 of the battery pack. Thereby, the male power terminal of the electric tool and the female power terminal of the battery pack are electrically connected.

It will be readily apparent to those skilled in the art that in order to increase the contact area of the male terminal 10 and the female terminal 20, the female terminal 20 may be provided with a plurality of pairs of elastic plate portions in the lateral direction in parallel on the support plate 23, and the number of the flat plate portions of the male terminal 10 Similar to the number of pairs of the elastic plate portions of the female terminal 20, a plurality of pairs of elastic plate portions may be provided in the longitudinal direction of the first elastic plate portion 21 and the second elastic plate portion 22, and at this time, the flat plate portion of the male terminal 10 The number is still two. The logarithm of the elastic plate portion of the female terminal 20 depends on the specific current operating conditions. In principle, the larger the current, the more the number of the elastic plate portions is, so as to increase the contact area between the male terminal 10 and the female terminal 20, but It is also necessary to consider the overall size and cost of the battery pack.

Thus, by providing the female terminal 20 having a plurality of pairs of elastic plate portions and the male terminal 10 having a plurality of flat plate portions, the contact area when the male terminal 10 and the female terminal 20 are butted can be increased, and the flow through the contact portion can be reduced. The current improves the contact stability between the male terminal 10 and the female terminal 20, and can solve the problem that the contact between the male terminal 10 and the female terminal 20 is poorly contacted and the temperature rise is too high under a large current operation condition.

The basic principles, main features and advantages of the present disclosure have been shown and described above. It should be understood by those skilled in the art that the above-described embodiments are not intended to limit the disclosure in any way, and the technical solutions obtained by means of equivalent replacement or equivalent transformation are all within the scope of the disclosure.

Industrial applicability

The present disclosure provides a power tool combination that can solve the problem of poor contact between the contact portions of the male terminal and the female terminal and excessive temperature rise under high current operating conditions.

Claims

A power tool combination comprising a first device and a second device, the first device comprising a male terminal, the second device comprising a female terminal, wherein the male terminal comprises a first flat portion spaced apart and a second flat plate portion; the female terminal includes a first elastic plate portion and a second elastic plate portion that are spaced apart; when the male terminal and the female terminal are butted, the first flat plate portion and the first elastic portion The plate portion is in contact with the second flat plate portion in contact with the second elastic plate portion.
The power tool combination according to claim 1, wherein the first flat plate portion and the second flat plate portion of the male terminal are connected to each other; and the first elastic plate portion and the second elastic plate portion of the female terminal are connected to each other .
A power tool combination according to claim 1, wherein said female terminal comprises a support plate, said first elastic plate portion and said second elastic plate portion being disposed adjacent to said left and right sides of said support plate On the side, the support plate is for supporting the first elastic plate portion and the second elastic plate portion.
The power tool combination according to claim 3, wherein the support plate comprises a first support portion, a second support portion, a third support portion, a fourth support portion, and a first connecting portion and a second connecting portion, a third connecting portion; the first elastic plate portion includes a left elastic plate portion and a right elastic plate portion, and a left elastic plate portion of the first elastic plate portion is horizontally supported on the first supporting portion The right elastic plate portion of the first elastic plate portion is horizontally supported on the second support portion; the second elastic plate portion includes a left elastic plate portion and a right elastic plate portion, the second elastic portion The left elastic plate portion of the plate portion is horizontally supported on the third support portion, and the right elastic plate portion of the second elastic plate portion is horizontally supported on the fourth support portion; the first connection Connecting the first support portion and the second support portion, the second connection portion connecting the second support portion and the third support portion, the third connection portion connecting the third support portion and the fourth support portion unit.
The power tool combination according to claim 4, wherein said first connecting portion connects an upper portion of said first support portion and said second support portion, said second connecting portion connects said second support portion and a lower portion of the third support portion, the third connection portion is connected to an upper portion of the third support portion and the fourth support portion, and a lower portion of the first support portion and a lower portion of the fourth support portion are provided with fixing legs, For fixing the support plate to another support plate.
A power tool combination according to any one of claims 1 to 5, wherein said male terminal and said female terminal are provided for a power supply terminal.
A power tool combination according to any one of claims 1 to 5, wherein the first device is a power tool and the second device is a battery pack.
A power tool combination according to any one of claims 1 to 5, wherein said first device is a battery pack and said second device is a power tool.
A power tool combination according to any of claims 1-5, wherein said first device is a charger and said second device is a battery pack.
A power tool combination according to any of claims 1-5, wherein said first device is a battery pack and said second device is a charger.
A power tool combination comprising a first device and a second device, the first device comprising a male terminal, the second device comprising a female terminal, wherein the male terminal comprises a first flat portion and a second flat plate The female terminal includes a first pair of elastic plate portions and a second pair of elastic plate portions; when the male terminal and the female terminal are butted, the first flat plate portion is inserted into the first pair of elastic plate portions And contacting the first pair of elastic plate portions, the second flat plate portion being inserted between the second pair of elastic plate portions to be in contact with the second pair of elastic plate portions.