CN211103814U

CN211103814U - Battery box and battery pack for electric tool and electric tool assembly

Info

Publication number: CN211103814U
Application number: CN201922030949.7U
Authority: CN
Inventors: 柯瑞林; 张新辉; 赵爱民
Original assignee: Bosch Power Tools China Co Ltd
Current assignee: Bosch Power Tools China Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-07-28
Anticipated expiration: 2029-11-21

Abstract

The present disclosure provides a battery pack and a battery pack for a power tool and a power tool assembly. The battery case (20) includes: a housing (21) receiving a battery for supplying power to the power tool, the housing having a first housing portion and a second housing portion, the second housing portion being openable and closable relative to the first housing portion; an on/off switch (22) located within the housing having a closed state that permits the battery to energize a power circuit that powers the power tool and an open state that inhibits energization of the power circuit; and a handle (24) mounted on the housing, the handle having a pull position for pulling the battery compartment and a trigger position for holding the first and second housing portions closed and placing the on/off switch in a closed state. The technical scheme of this disclosure can reduce the damaged risk of battery and electric tool in the group battery.

Description

Battery box and battery pack for electric tool and electric tool assembly

Technical Field

The present disclosure relates to a battery pack and a battery pack for a power tool and a power tool assembly.

Background

Electric tools are widely used in the fields of construction, house decoration, automobile assembly, engineering machinery, electric power, metallurgy, mines, bridges, gardening and the like, and enter families in large quantities. The power tool may employ a variety of power supply methods, one of the more common power supply methods being attachment of the power tool to an external power supply device so that the power supply device supplies power to the power tool.

In the case of the external power supply device, the power supply device may supply power to the electric power tool to operate the electric power tool by electrically connecting the power supply device to the electric power tool regardless of whether the housing of the power supply device is closed. That is, the power supply circuit is able to be energized even if the battery in the power supply device is in an exposed state. Such a solution presents safety risks, for example, when the power tool is operated outdoors, it is very easy for water to splash on the battery and cause damage to the battery.

Therefore, it is desirable to provide a solution to the above technical problem.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, the present disclosure is directed to providing a battery pack, and a power tool assembly for a power tool, which can reduce the risk of damage to a battery that supplies power to the power tool and the power tool.

According to an aspect of the present disclosure, there is provided a battery pack for a power tool, including: a housing that receives a battery that provides power to the power tool, the housing having a first housing portion and a second housing portion that is openable and closable relative to the first housing portion; an on/off switch located within the housing having a closed state that allows the battery to energize a power circuit that powers the power tool and an open state that prohibits the power circuit from energizing; and a handle mounted on the housing, the handle having a pull position for pulling the battery compartment and a trigger position for holding the first and second housing portions closed and placing the on/off switch in a closed state.

According to a possible embodiment, the battery compartment further comprises pre-closing means for bringing the first and second housing parts into a pre-closed state; and the on/off switch is in an open state in a case where the pre-closing means brings the first and second housing portions into a pre-closed state and the handle is not in the trigger position.

According to one possible embodiment, the pre-closing means comprise a connecting element arranged on an inner surface of the end wall of the second housing part and a fitting element arranged in the inner space of the outer shell, adapted to cooperate with the connecting element to achieve a pre-closed state of the first and second housing parts.

According to one possible embodiment, the first housing part is immovable on the housing and the second housing part is openable relative to the first housing part to cause the housing to open or the second housing part is closable relative to the first housing part to cause the housing to close.

According to one possible embodiment, the on/off switch comprises an operating member having an actuating travel in the inner space of the housing driven by an actuating member located on the inner surface of the end wall of the second housing part; and the on/off switch is configured to close upon completion of the actuation stroke by the runner.

According to one possible embodiment, the on/off switch is a microswitch, the runner comprising a contact adapted to be pressed by the actuating member to run on the actuation stroke.

According to one possible embodiment, there are a reinforcement and a stop on the outer surface of the top wall of the second housing part; and the inner surface of the handle middle part can be in sliding contact with the reinforcing piece until the handle is stopped at the limiting piece in the sliding direction to reach the triggering position.

According to one possible embodiment, the reinforcement comprises one or more reinforcing ribs located on the outer surface of the top wall of the second housing portion; the stop comprises a step on the outer surface of the top wall of the second housing portion; the handle intermediate portion has a contact portion on an inner surface thereof, which includes one or more ribs for increasing a contact area of the inner surface of the handle with the one or more ribs; and the handle generates a force during sliding that causes the actuator to drive the operating member in a direction that causes the on/off switch to close.

According to one possible embodiment, the battery case further comprises a sealing ring having elasticity, the sealing ring being disposed on an inner periphery of the case where the first case portion and the second case portion are joined; and in the case where the handle is not in the trigger position, the sealing ring causes the runner of the on/off switch to travel a distance over the actuation stroke in a direction that causes the on/off switch to open, so that the on/off switch opens.

According to a possible embodiment, the battery pack further comprises a circuit board located inside the casing, the battery, the circuit board and the power tool are electrically connected in sequence to form the power supply circuit, and the on/off switch controls the on/off of the power supply circuit section between the battery and the circuit board.

According to one possible embodiment, the handle is rotatable about its connection point with the housing between the pulled-up position and the triggered position.

According to a possible embodiment, the battery box further comprises a start-stop switch, and the start-stop switch is arranged on the shell and used for an operator of the electric tool to control whether the electric tool runs or not.

According to another aspect of the present disclosure, there is provided a battery pack for a power tool, including: a battery for providing power to the power tool; and the battery box is used for receiving the battery and controlling the power supply circuit of the battery for supplying power to the electric tool to be switched on and off.

According to yet another aspect of the present disclosure, there is provided a power tool assembly comprising: an electric tool; and a battery compartment as described above adapted to be attached to the power tool for receiving a battery for providing power to the power tool and controlling the battery to switch on and off a power supply circuit for supplying power to the power tool.

According to yet another aspect of the present disclosure, there is provided a power tool assembly including: an electric tool; and the battery pack is used for providing power for the electric tool and controlling the connection and disconnection of a power supply loop for supplying power to the electric tool.

As can be seen, according to the battery pack of the present disclosure, the energization of the power supply circuit is prohibited in a state where the case thereof is open, and the energization of the power supply circuit is permitted only in a state where the case of the battery pack is fully closed. Thus, under the control of the battery compartment, the battery is electrically turned on only in a closed state (i.e., a state in which the case of the battery compartment is closed), thereby serving to reduce the risk of damage to the battery. Moreover, the technical scheme of the disclosure also improves the safety of the battery pack and the electric tool attached with the battery pack. In addition, the case of the battery case has a pre-closed state, thereby facilitating an operator to perform an operation of installing or replacing the battery with only one hand.

Drawings

Fig. 1 shows a schematic view of a power tool assembly according to one possible embodiment of the present disclosure.

Fig. 2A to 2C are schematic views showing the structure of a battery case of the power tool assembly of fig. 1, wherein the battery cases are in different states, respectively.

Fig. 3A-3D show exploded views of the battery compartment of the power tool assembly of fig. 1.

Fig. 4A-4B show schematic diagrams of the on/off switch of the battery pack of the power tool assembly of fig. 1, wherein the on/off switch is in an open state and a closed state, respectively.

Detailed Description

Various embodiments according to the present disclosure are described below with reference to the drawings.

Fig. 1 schematically illustrates a power tool assembly 100 according to one possible embodiment of the present disclosure, which includes a power tool 10 and a battery compartment 20 removably attached to the power tool 10. Fig. 2A-2C show a schematic view of the battery compartment 20, wherein in fig. 2A the housing 21 of the battery compartment 20 is in a pre-closed state and the handle 24 is in a pulled-up position, in fig. 2B the housing 21 is in a closed state and the handle 24 is in a trigger position, and in fig. 2C the housing 21 is in an open state. Fig. 3A to 3D show respective constituent parts of the battery cartridge 20. Fig. 4A and 4B show the open state and the closed state of the on/off switch 22 of the battery cartridge 20, respectively.

The power tool 10 is powered by a battery (not shown) mounted in the battery compartment 20. When the power tool 10 needs to be operated, the power tool 10 is electrically connected to the battery pack 20 to supply the electric power of the battery in the battery pack 20 to the motor of the power tool 10. When the power tool 10 is not in use, the battery pack 20 may be removed from the power tool 10 so that they are stored separately.

In one embodiment, in addition to the electrical connection, a mechanical connection may be included between the battery compartment 20 and the power tool 10 for a more secure attachment therebetween. Any suitable structure 30 may be used to effect this mechanical connection, such as a hook or a binding string.

The battery pack 20 includes a housing 21, a circuit board (not shown) located within the housing 21, an on/off switch 22 and pre-close means, and a handle 24 mounted on the housing 21. A battery that supplies power to the power tool 10 may be fixed in the housing 21 by a battery holder provided in the housing 21. The battery is electrically connected to the motor of the electric tool via the circuit board to constitute a power supply circuit for supplying power to the electric tool 10.

The on/off switch 22 is connected in series between the battery and the circuit board, and is used for controlling whether the power supply circuit section between the battery and the circuit board is electrified or not, thereby realizing the function of allowing or prohibiting the electrification of the battery and the electric tool. When the on/off switch 22 is closed, the power supply circuit segment between the battery and the circuit board is allowed to be energized, i.e., the battery is allowed to power up the circuit board. When the on/off switch 22 is off, the power supply loop section between the battery and the circuit is inhibited from being energized, i.e., the battery is inhibited from powering up the circuit board.

The arrangement of the functional components within the housing 21 may take a variety of suitable forms. In one embodiment, a support plate 25 is provided within the housing 21, the support plate 25 dividing the interior space of the housing 21 into two portions. A battery holder may be provided on the support plate 25, by which the battery is held in the housing 21. The battery holder includes a battery terminal clip electrically connected to an electrode of the battery.

The housing 21 may include a first housing portion 21A and a second housing portion 21B. The first housing portion 21A is configured as a non-movable base. The second housing portion 21B is configured as a cover that can be opened and closed with respect to the first housing portion 21A. The first housing portion 21A and the second housing portion 21B may be coupled in a variety of ways. For example, the second housing portion 21B is connected to the first housing portion 21A at an edge of the first end portion 210 and rotates about a connection axis of the two, so that the outer case 21 is opened or closed. For example, when the cover (the second housing portion 21B) is opened from the base (the first housing portion 21A), the housing 21 is opened, and when the cover (the second housing portion 21B) is closed from the base (the first housing portion 21A), the housing 21 is closed.

The on/off switch 22 is provided in the housing 21, and has a closed state and an open state. When the on/off switch 22 is in the closed state, the battery is allowed to power up the circuit board, thereby allowing the power supply circuit to be energized. When the on/off switch 22 is in the off state, the battery cannot power up the circuit board, thereby disabling the power supply circuit from being powered on.

In one embodiment, the on/off switch 22 is implemented as a mechanical switch (e.g., a microswitch) including an operator 221, a first terminal 222 and a second terminal 224 electrically connected to the positive and negative poles of the battery, respectively. When the on/off switch 22 is in the closed state, the positive and negative poles of the battery are electrically connected to the first terminal 222 and the second terminal 224, respectively, and both the first terminal 222 and the second terminal 224 are electrically connected to the circuit board, whereby the power supply circuit section from the battery to the circuit board is energized, and the battery is powered on for the circuit board. Conversely, when the on/off switch 22 is in the closed state, the positive and negative poles of the battery are electrically connected to the first terminal 222 and the second terminal 224, respectively, and neither the first terminal 222 nor the second terminal 224 is electrically connected to the circuit board, thereby inhibiting the battery from powering the circuit board.

The operating member 221 operates over an actuating stroke by being driven by an actuating member 216 provided on the second housing portion 21B. The actuator 216 may be disposed on an inner surface of the second end 220 (opposite the first end 210) of the second housing portion 21B, and the actuator 216 may be configured as a projection, e.g., a tab-like projection, extending outwardly from the inner surface of the second end 2220 of the second housing portion 21B (see fig. 3C). The operating member 221 may be configured to receive a contact (see fig. 4A and 4B) pressed by the actuating member 216 and have an actuating stroke that operates in the interior space of the housing 21 under the driving of the actuating member. For example, the runner 221 extends from an aperture in the support plate 25 to receive depression of the actuator 220. When the actuator 216 drives the operating member 221 to operate over an actuation stroke during the closing of the second housing portion 21B (cover) to the first housing portion 21A (base), the on/off switch 22 is closed when the operating member 221 completes the actuation stroke. The on/off switch 22 is always in the off state without the operating member 221 completing the actuation stroke.

A pre-closing means is provided within the housing 21 for achieving a pre-closing of the housing 21, i.e. a pre-closing of the first housing part 21A and the second housing part 21B. When the first and

second housing portions

21A, 21B are in the pre-closed state, the two housing portions are connected together without spreading apart. In other words, the housing 21 does not assume an open state and is in a state of not being completely closed. When the pre-closing means is closed so that the first housing part 21A and the second housing part 21B are in the pre-closed state, the on/off switch 22 is still in the open state, as a result of which the two housing parts are connected together without being spread apart, but the power supply circuit is not energized.

In one embodiment, the pre-closing means is realized as a mechanical structure comprising a connecting piece 23B and a mating piece 23A. The connecting piece 23B is arranged on the inner surface of the second end 220 of the second housing part 21B and the fitting piece 23A is arranged in the inner space of the outer shell 21, adapted to cooperate with the connecting piece 23B to achieve the closed state of the pre-closing device. For example, the connecting piece 23B of the pre-closing device and the mating piece 23A are realized together as a snap-in structure. Referring to fig. 3C, the connector 23B can be configured as one or more protrusions extending outwardly from an inner surface of the second end 220 of the second housing portion 21B that are parallel to the actuator 216 and have a length in the direction of extension that is less than a length of the actuator 216 in the direction of extension. The engagement member 23A is configured to include an open slot on the support plate 25 which is complementary in shape to the boss 23B, the boss 23B entering the open slot during closure of the second housing part 21B towards the first housing part 21A to bring the two into the pre-closed condition and snapping the two together by virtue of the resilience of the material from which the pre-closure means is constructed.

The pre-closing device of the present disclosure has many advantages, for example, it can provide convenient, fast and economical pre-closing for two housing parts, and it is not necessary to match with locking fittings such as screws and adapters when pre-closing, and it can be buckled with each other only by one closing operation (for example, plugging operation). In addition, since the case 21 of the battery box 20 has a pre-closed state, it is possible to satisfy the requirement that the battery is not immediately energized when the battery is loaded in the battery box 20, for example, by hanging the battery box 20, in which the battery is loaded, on a wall through the handle 24. It should be understood that the pre-closing means formed by the connection member 23B and the fitting member 23A may be implemented in various forms, not limited thereto.

In this embodiment, during the closing of the two housing parts, first the pre-closing means are closed so that the two housing parts are pre-closed, at which time the operating member 221 of the on/off switch 22 has operated only a part of its actuation stroke, i.e. has not yet completed the actuation stroke. As a result, the pre-closing means is closed and the on/off switch 22 is opened, whereby the two housing parts do not spread apart and the supply circuit is not energized. The on/off switch 22 is then assisted in the closed state by means of the handle 24. The structure and function of the handle 24 is described below.

The handle 24 has a plurality of functions, for example, a function of pulling the battery case 20 and a trigger function of causing the on/off switch 22 to be closed. Accordingly, the handle 24 has a pull-up position for performing a pull-up function and a trigger position for performing a trigger function. Referring to fig. 2A-2C and 3D, both end portions of the handle 24 are attached to one of both side walls of the first housing portion 21A, respectively. The handle 24 is rotatable about a connection point with the first housing portion 21A between a pulled position and a triggered position. The pulled-up position is, for example, a position where the handle 24 is parallel to the bottom end of the first housing portion 21A (see fig. 2A). The trigger position is, for example, a position in which the handle 24 "lies" on the second housing part 21B and "catches" the housing 21 (see fig. 2B).

Referring to fig. 3A, a reinforcing member 217 and a stopper 218 are provided on an outer surface of the top wall of the second housing portion 21B. Referring to fig. 3D, there is a contact member 242 on the inner surface of the middle portion of the handle 24. The contact piece 242 on the inner surface of the handle middle portion is able to slidably contact the reinforcement 217 and slide until the handle 24 is stopped by the stopper 218 in the sliding direction to reach the trigger position.

In one embodiment, the reinforcement 217 may be configured as one or more reinforcing ribs. The stop 218 may be configured as a step extending outwardly from an outer surface of the top wall of the second housing portion 21B. The contact member 242 may be configured as one or more ribs for increasing the contact area with the reinforcing rib when the handle 24 is slid in the sliding direction. The handle 24, during sliding towards the stop 218, generates a force that causes the actuator 216 to drive the runner 221 in a direction that closes the on/off switch 22. when the handle 24 is stopped at the stop 218 in the trigger position, the runner 221 completes the actuation stroke to close the on/off switch 22.

As can be seen, the handle 24 according to the present disclosure has a function of assisting the on/off switch 22 to be closed by designing a structure to be actuated with the housing 21 in addition to the pulling function of the conventional handle.

In addition, the battery case 20 may further include a gasket 28 made of a material having elasticity (e.g., rubber). A gasket 28 is provided in the casing 21 at an inner peripheral edge of the first case portion 21A which comes into contact with the second case portion 21B when the first case portion 21A and the second case portion 21B are closed, and a waterproof function of the battery case 20 can be achieved by this gasket 28. Due to the elasticity of the sealing ring 28, the two housing parts of the housing 21 spring apart a little when the handle 24 is moved out of the trigger position, i.e. the handle 24 no longer exerts a "pressing" force on the housing. As a result, the operating member 221 of the on/off switch 22 is operated for a distance in the actuating stroke in a direction such that the on/off switch 22 is opened, whereby the power supply circuit becomes the deenergized state.

It follows that the on/off switch 22 is in the closed state only when the handle 24 is in the trigger position to continuously apply the pressing force to the housing 21. Once the handle 24 is moved away from the trigger position, the on/off switch 22 is opened and the power circuit is changed to a de-energized state.

In addition, the battery pack 20 may further include a start/stop switch for an operator of the power tool 10 to control whether the power tool 10 is operated. The start-stop switch may be disposed on the housing 21 of the battery pack 20 and electrically connected in the power supply circuit, and its specific position may be on a circuit section between the battery and the circuit board or on a circuit section where the circuit board is connected to the power tool. It should be understood that the start-stop switch may also be provided on the power tool, for example on the housing of the power tool and electrically connected in the power supply circuit.

The present disclosure also provides a battery pack for a power tool, which includes a battery (e.g., a lithium battery) for supplying power to the power tool, and a battery case. The battery box is used for accommodating the battery and controlling the connection and disconnection of a power supply loop for supplying power to the electric tool by the battery. Here, the battery may be implemented as the above-described battery, and the battery cartridge may be implemented as the above-described battery cartridge, and thus, the above-described related description is equally applicable thereto.

The present disclosure also provides a power tool assembly. In one implementation, the power tool assembly includes a power tool and the battery pack described above. In another implementation, the power tool assembly includes a power tool and the battery pack described above. Accordingly, the same description applies.

While certain embodiments have been described above, these example embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. The appended claims and their equivalents are intended to cover all such modifications, substitutions and changes as may be made within the scope and spirit of the present invention.

Claims

1. A battery pack (20) for a power tool (10), comprising:

a housing (21) receiving a battery for supplying power to the power tool, the housing having a first housing portion and a second housing portion, the second housing portion being openable and closable relative to the first housing portion;

an on/off switch (22) located within the housing having a closed state that permits the battery to energize a power circuit that powers the power tool and an open state that inhibits energization of the power circuit; and

a handle (24) mounted on the housing, the handle having a pull position for pulling the battery compartment and a trigger position for holding the first and second housing portions closed and placing the on/off switch in a closed state.

2. Battery pack (20) for a power tool according to claim 1, wherein said battery pack further comprises pre-closing means for bringing the first and second housing parts into a pre-closed state; and is

The on/off switch is in an open state in a case where the pre-close means brings the first and second housing portions into a pre-close state and the handle is not in the trigger position.

3. Battery pack (20) for a power tool according to claim 2, wherein the pre-closing means comprises a connecting member (23B) arranged on an inner surface of the end wall of the second housing part and a mating member (23A) arranged in the inner space of the casing adapted to cooperate with the connecting member to achieve the pre-closed state of the first and second housing parts.

4. Battery pack (20) for a power tool according to claim 1, wherein the first housing part is immovable on the housing and the second housing part is openable relative to the first housing part to cause the housing to open or closable relative to the first housing part to cause the housing to close.

5. A battery compartment (20) for a power tool as defined in claim 1, wherein said on/off switch includes an operating member having an actuating stroke operating in the interior space of the housing upon actuation of an actuating member located on an interior surface of the end wall of the second housing portion; and is

The on/off switch is configured to close upon completion of the actuation stroke by the runner.

6. A battery pack (20) for a power tool as claimed in claim 5, wherein said on/off switch is a micro switch and said operating member includes a contact adapted to be depressed by said actuating member to operate over said actuation stroke.

7. Battery pack (20) for a power tool according to claim 5, wherein a reinforcing member (217) and a retaining member (218) are provided on the outer surface of the top wall of the second housing portion; and is

The inner surface of the handle middle part can be in sliding contact with the reinforcing piece until the handle is stopped at the limiting piece in the sliding direction to reach the triggering position.

8. A battery pack (20) for a power tool as claimed in claim 7, wherein said reinforcement includes one or more reinforcing ribs on the outer surface of the top wall of said second housing portion;

the stop comprises a step on the outer surface of the top wall of the second housing portion;

the handle mid-portion having a contact portion (242) on an inner surface thereof comprising one or more ribs for increasing the contact area of the inner surface of the handle with the one or more strengthening ribs; and is

The handle generates a force during sliding that causes the actuator to drive the operating member in a direction that causes the on/off switch to close.

9. A battery pack (20) for a power tool as claimed in claim 5, wherein said battery pack further comprises a resilient sealing ring (28) provided on an inner periphery of the housing where the first housing portion and the second housing portion are joined; and is

In the case of the handle not being in the trigger position, the sealing ring moves the runner of the on/off switch over a distance in the actuating stroke in a direction in which the on/off switch is opened, so that the on/off switch is opened.

10. Battery pack (20) for a power tool according to claim 1, wherein the battery pack further comprises a circuit board located in the housing, the battery, the circuit board and the power tool being electrically connected in sequence to form the power supply circuit, and the on/off switch controls the switching of the section of the power supply circuit between the battery and the circuit board.

11. A battery pack (20) for a power tool as claimed in claim 1, wherein said handle is rotatable about the connection point of said handle to said housing between said lifted position and said triggered position.

12. A battery pack (20) for a power tool as claimed in claim 1, wherein the battery pack further comprises a start-stop switch provided on the housing for an operator of the power tool to control whether the power tool is operated.

13. A battery pack for a power tool, comprising:

a battery for providing power to the power tool; and

a battery pack as claimed in any one of claims 1 to 12 for receiving said battery and controlling the switching on and off of a power supply circuit for the battery to power the power tool.

14. A power tool assembly, comprising:

an electric tool; and

a battery pack as claimed in any one of claims 1 to 12 adapted for attachment to a power tool, the battery pack being adapted to receive a battery for providing power to the power tool and to control the battery to switch on and off a power supply circuit for powering the power tool.

15. A power tool assembly, comprising:

an electric tool; and

the battery pack according to claim 13, for supplying power to the power tool and controlling the on and off of a power supply circuit for supplying power to the power tool.