CN103240713A - Hand-held electric tool - Google Patents

Abstract

The invention discloses a hand-held electric tool, which comprises a battery pack, a shell, a motor and a transmission mechanism which are arranged in the shell, and an output shaft which is driven by the transmission mechanism and performs reciprocating swing motion. The battery pack is provided with at least two electrode plates, and the butt surfaces between the electrode plates and the power supply ends are parallel to the direction of swing motion. Therefore, the power supply end is prevented from impacting the electrode plates, the electrode plates are prevented from deforming, expanding or falling off, and the service life of the battery pack is prolonged.

Description

Handheld Power Tools

technical field

The invention relates to an electric power tool, in particular to a hand-held electric power tool.

Background technique

Please refer to FIG. 1 , in the existing vibrating or swinging hand-held electric tool 100 , such as a multi-function machine, the opening direction of the electrode piece 111 of the battery pack 110 is not consistent with the swinging direction S-S of the hand-held electric tool 100 . When the hand-held electric tool 100 is working, the power supply terminal in the battery compartment swings and continuously impacts the electrode sheet 111, which easily deforms the electrode sheet 111, thereby expanding the distance between the electrode sheets 111, and even causing the pads of the electrode sheet 111 to fall off. make the battery pack useless.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention provides a hand-held electric battery that prevents the power supply terminal in the battery compartment from impacting the electrode sheets of the battery pack during operation, prevents the electrode sheets of the battery pack from being deformed, the distance between them expands or falls off, and prolongs the life of the battery pack. tool.

The technical solution of the present invention is achieved as follows: a hand-held electric tool, including a battery pack, a housing, a motor arranged in the housing, a transmission mechanism driven by the motor, and a An output shaft with reciprocating swing motion on its own axis, a battery compartment is provided on the housing, at least two power terminals are provided in the battery compartment, at least two electrode pieces are provided on the battery pack, and the battery pack The electrode piece on the upper part cooperates with the power supply terminal in the battery compartment to supply power to the motor, and the contact surface between the electrode piece and the power supply terminal is parallel to the direction of the swinging motion.

Preferably, the at least two power terminals are arranged at the bottom of the battery compartment, and the at least two electrode sheets are arranged on the side of the battery pack perpendicular to the axis of the battery pack.

Preferably, one of the power supply end and the electrode sheet is an insert, and the other of the power supply end and the electrode sheet includes at least two metal fragments, the two metal fragments are arranged oppositely, and a gap is formed between the two metal fragments. a gap, the extending direction of the gap is parallel to the direction of the swinging motion.

Further, the electrode sheet includes a first electrode sheet and a second electrode sheet, each of the first electrode sheet and the second electrode sheet includes at least two metal segments, and a first gap is formed between the metal segments of the first electrode sheet , a second gap is formed between the metal segments of the second electrode sheet, and the extension direction of the first gap coincides with that of the second gap.

Preferably, the standard output voltage of the battery pack is about 10.8V or 14.4V.

Preferably, the output current of the battery pack is about 8-20A.

A hand-held electric tool, comprising a battery pack, a casing, a motor arranged in the casing, a transmission mechanism driven by the motor, and an output shaft driven by the transmission mechanism and reciprocatingly swinging around its own axis, The output shaft is perpendicular to the first plane, the housing is provided with a battery compartment, the battery compartment is provided with at least two power terminals, the battery pack is provided with at least two electrode pieces, and the battery pack is The electrode piece on the top cooperates with the power supply terminal in the battery compartment to supply power to the motor, and the feature is that: the abutment surface between the electrode piece and the power supply terminal is parallel to the first plane.

Preferably, the at least two power terminals are arranged at the bottom of the battery compartment, and the at least two electrode sheets are arranged on the side of the battery pack perpendicular to the axis of the battery pack.

Preferably, one of the power supply end and the electrode sheet is an insert, and the extension direction of the insert is parallel to the first plane, and the other of the power supply end and the electrode sheet includes at least two metal segments, and the two Two metal segments are arranged opposite to each other, and a gap is formed between the two metal segments, and the extension direction of the gap is parallel to the first plane and perpendicular to the axis of the battery pack.

Further, the electrode sheet includes a first electrode sheet and a second electrode sheet, each of the first electrode sheet and the second electrode sheet includes at least two metal segments, and a first electrode sheet is formed between the two metal segments of the first electrode sheet. A gap, a second gap is formed between the two metal segments of the second electrode sheet, and the extension direction of the first gap coincides with the extending direction of the second gap.

Beneficial effects of the present invention: the hand-held electric tool of the present invention avoids the battery compartment when the hand-held electric tool is working by setting the abutment surface between the electrode piece on the battery pack and the power supply terminal in the battery compartment to be parallel to the direction of the swinging motion. The power end of the battery impacts the electrode sheets of the battery pack, preventing the electrode sheets of the battery pack from being deformed, the distance between them expanding or falling off, and improving the life of the battery pack.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

FIG. 1 is a schematic perspective view of a conventional hand-held electric tool.

Fig. 2 is a three-dimensional schematic view of the hand-held electric tool of the present invention.

FIG. 3 is a schematic perspective view of the hand-held electric tool in FIG. 2 with a part of the housing removed.

FIG. 4 is a schematic top view of the eccentric transmission mechanism of the hand-held electric tool in FIG. 3 .

FIG. 5 is a schematic perspective view of another viewing angle of the handheld electric tool in FIG. 2 .

FIG. 6 is a schematic perspective view of the battery pack of the hand-held electric tool in FIG. 2 .

FIG. 7 is a schematic perspective view of the battery pack in FIG. 6 without part of the housing.

in,

100. Multifunction machine; 110. Battery pack; 120. Housing;

130. Eccentric transmission structure; 140. Output shaft; 150. Working head;

131. Eccentric shaft; 132. Eccentric piece; 133. Shift fork;

10. Motor shaft; 133a, bottom; 133b, extension arm;

121. Battery compartment; 122. Power terminal; 111. Electrode sheet;

112. The first battery unit; 113. The circuit board; 114. The battery pack;

115, the second battery unit; 116, the platform; 111a, the first electrode piece;

111b, the second electrode piece 117, the metal slice; 118a, the first gap;

118b, the second gap; 160, the first plane;

Detailed ways

Referring to Fig. 2 and Fig. 3, the present invention relates to a hand-held electric tool. In this embodiment, a multi-function machine 100 is taken as an example, including a battery pack 110, a casing 120, and a motor arranged in the casing 120 (not shown in the figure). shown) and the eccentric transmission structure 130, the output shaft 140 driven by the eccentric transmission mechanism 130 to reciprocate and swing, and the working head 150 driven by the output shaft 140.

The eccentric transmission structure 130 includes an eccentric shaft 131 , an eccentric member 132 and a shift fork 133 .

Please continue to refer to FIG. 4 , the eccentric shaft 131 is eccentrically arranged on the end surface of the motor shaft 10 of the motor, that is, the center line a-a of the eccentric shaft 131 and the center line b-b of the motor shaft 10 are separated by a certain distance. The shape of the eccentric member 132 is a truncated cone, and the end of the eccentric shaft 131 passes through the middle of the eccentric member 132 . The shift fork 133 is U-shaped and has a bottom 133a and two extension arms 133b. The bottom of the shift fork 133 is fixedly connected to the output shaft 140 , and the two extension arms 133 b are arranged opposite to each other and abut against the circumference of the eccentric member 132 .

When the motor works, it drives the motor shaft 10 to rotate, and the motor shaft 10 drives the eccentric shaft 131 to perform circular motion. When the eccentric shaft 131 drives the eccentric member 132 to deflect to the left extension arm 133b of the shift fork 133 as a whole, the shift fork 133 deviates to the left as a whole; similarly, when the eccentric member 132 as a whole deviates to the right extension arm 133b, the shift fork 133 as a whole deviates to the right. The left and right deflection of the shift fork 133 drives the output shaft 140 to perform a reciprocating swing around the axis of the output shaft 140 , thereby driving the working head 150 to operate.

Referring to FIG. 5 , the end of the casing 120 away from the working head 150 is recessed toward the inside of the casing to form a battery compartment 121 . The bottom of the battery compartment 121 is provided with at least two power terminals 122 . The power supply end 122 is a sheet-shaped insert.

The axis c-c of the output shaft 140 is perpendicular to the first plane 160 , and the extension plane of the power supply end 122 is parallel to the first plane 160 and also parallel to the direction of the swinging movement of the multifunction machine 100 . When the multifunction machine 100 is working, under the inertia of the working head 150 swinging left and right, the housing 120 also swings left and right correspondingly, driving the power supply terminal 122 in the battery compartment 121 to swing along the direction of the swinging motion.

Please refer to FIG. 6 and FIG. 7 at the same time. The battery pack 110 has at least two electrode sheets 111 , a plurality of first battery cells 112 and a circuit board 113 .

Several first battery units 112 are stacked in parallel to form a battery pack 114 . In this embodiment, three first battery units 112 are stacked to form a battery pack 114 , the axis d-d of the battery pack 114 is parallel to the three first battery units 112 , and the sides of the battery pack 114 perpendicular to the axis d-d are triangular.

The circuit board 113 is arranged on the triangular side of the battery pack 114 , and can protect the battery pack 114 from overcharging/overdischarging, and collect temperature signals, voltage signals or charge and discharge status signals of the battery pack 110 .

The electrode sheet 111 is welded on the circuit board 113 and includes a positive electrode, a negative electrode and a plurality of signal electrodes. The positive electrode and the negative electrode are used to output energy to the multi-function machine 100 , and several signal electrodes are used to output temperature signals, voltage signals or charge and discharge status signals in the battery pack 110 .

The standard output voltage of each battery unit is about 3.6V, and the output voltage of the battery pack 110 is about 10.8V.

Further, the battery pack 110 includes three first battery units 112 and one second battery unit 115 . The three first battery units 112 are stacked in a triangle shape, and the second battery unit 115 is stacked on the end face of the first battery unit 112 . The remaining parts of the end faces of the three first battery cells 112 form a platform 116 . The electrode sheet 111 is located on the platform 116 .

The standard output voltage of each battery unit is about 3.6V, and the output voltage of the battery pack 110 is about 14.4V.

In this embodiment, the electrode sheet 111 includes a first electrode sheet 111a and a second electrode sheet 111b, and each of the first electrode sheet 111a and the second electrode sheet 111b includes at least two oppositely arranged metal segments 117, and the first electrode sheet 111a A narrow first gap 118a is formed between the two metal segments 117 of the second electrode sheet 111b, and a narrow and long second gap 118b is formed between the two metal segments 117 of the second electrode sheet 111b. When the battery pack 110 is loaded into the battery compartment 121 , the power terminals 122 are respectively inserted into the gaps of the corresponding electrode sheets 111 , so that the power terminals 122 are in stable contact with the electrode sheets 111 .

The extension direction of the first gap 118a of the first electrode sheet 111a and the second gap 118b of the second electrode sheet 111b is parallel to the first plane 160 and also parallel to the direction of the swinging movement of the multifunctional machine 100, and the first gap The extending direction of 118 a and the second gap 118 b is perpendicular to the axis d-d of the battery pack 110 .

When the multifunction machine 100 is working, the power supply terminal 122 in the battery compartment 121 also swings in the direction of the swing motion of the multifunction machine 100. Since the swing direction of the power supply terminal 122 is parallel to the extending direction of the gap between the electrode sheets 111, the power supply terminal 122 122 will not impact the electrode sheet 111 , so that the electrode sheet 111 is deformed and the distance between the electrode sheet 111 is enlarged, or the electrode sheet 111 falls off from the circuit board 113 , which improves the life of the battery pack 110 .

Further, the extension directions of the first gap 118a and the second gap 118b are on the same straight line.

It can be understood that the structure of the electrode piece 111 can be interchanged with that of the power supply end 122 , that is, the structure of the electrode piece 111 is a sheet-shaped insert, and the structure of the power supply end 122 is a metal segment disposed opposite to each other.

In other embodiments, the specific structures of the electrode sheet 111 and the power supply end 122 can also be in other forms, as long as the abutting surface between the electrode sheet 111 and the power supply end 122 is parallel to the swinging direction of the multifunction machine 100 .

In other embodiments, the hand-held electric tool can also be an impact drill or an electric hammer with vibration or swing motion, as long as the abutment surface between the electrode piece on the battery pack and the power terminal in the battery compartment is in contact with the vibration or swing motion direction is parallel.

Further, the output current of the battery pack 110 is about 8-20A, which can provide a relatively large driving capacity for the corresponding hand-held electric tool. Especially, when the hand-held electric tool is a multi-function machine, the output current of the battery pack 110 is about 15-20A.

In the hand-held electric tool in this embodiment, by setting the abutment surface between the electrode piece 111 on the battery pack 110 and the power supply terminal 122 in the battery compartment 121 to be parallel to the direction of the swinging motion, it avoids the battery compartment when the hand-held electric tool is working. The power supply terminal 122 in 121 impacts the electrode sheets 111 of the battery pack 110 to prevent the electrode sheets 111 of the battery pack 110 from deforming, expanding or falling off, and prolonging the life of the battery pack 110 .

Those skilled in the art can imagine that the specific structure of the hand-held electric tool in the present invention can have many variations, but the main technical features of the technical solution adopted are the same or similar to those of the present invention, and should be covered within the protection scope of the present invention .

Claims (10)

1. The utility model provides a handheld electric tool, includes battery package, casing, sets up motor in the casing, by motor drive's drive mechanism, and by drive mechanism drives and makes reciprocating swing motion's output shaft around self axis, be equipped with the battery compartment on the casing, be equipped with two at least power ends in the battery compartment, be equipped with two at least electrode slices on the battery package, electrode slice on the battery package with power end in the battery compartment cooperatees in order to give the motor power supply, its characterized in that: and the butt joint surface between the electrode plate and the power supply end is parallel to the direction of the swinging motion.

2. The hand-held power tool of claim 1, wherein: the at least two power supply ends are arranged at the bottom of the battery bin, and the at least two electrode plates are arranged on the side surface, perpendicular to the axis of the battery pack, of the battery pack.

3. The hand-held power tool of claim 1, wherein: one of the power end and the electrode plate is a plug-in, the other one of the power end and the electrode plate comprises at least two metal fragments, the two metal fragments are arranged oppositely, a gap is formed between the two metal fragments, and the extending direction of the gap is parallel to the swinging direction.

4. The hand-held power tool of claim 3, wherein: the electrode plates comprise a first electrode plate and a second electrode plate, the first electrode plate and the second electrode plate respectively comprise at least two metal fragments, a first gap is formed between the metal fragments of the first electrode plate, a second gap is formed between the metal fragments of the second electrode plate, and the extending directions of the first gap and the second gap are overlapped.

5. The hand-held power tool of claim 1, wherein: the standard output voltage of the battery pack is 10.8V or 14.4V.

6. The hand-held power tool of claim 1, wherein: the output current of the battery pack is 8-20A.

7. The utility model provides a handheld electric tool, includes battery package, casing, sets up motor in the casing, by motor drive's drive mechanism, and by drive mechanism drives and makes reciprocating swing motion's output shaft around self axis, the output shaft is perpendicular with first plane, be equipped with the battery compartment on the casing, be equipped with two at least power ends in the battery compartment, be equipped with two at least electrode slices on the battery package, electrode slice on the battery package with power end in the battery compartment cooperatees in order to give the motor power supply, its characterized in that: and the butt joint surface between the electrode plate and the power supply end is parallel to the first plane.

8. The hand-held power tool of claim 7, wherein: the at least two power supply ends are arranged at the bottom of the battery bin, and the at least two electrode plates are arranged on the side surface, perpendicular to the axis of the battery pack, of the battery pack.

9. The hand-held power tool of claim 7, wherein: one of the power end and the electrode plate is a plug-in, the extension direction of the plug-in is parallel to the first plane, the other one of the power end and the electrode plate comprises at least two metal fragments, the two metal fragments are oppositely arranged, a gap is formed between the two metal fragments, and the extension direction of the gap is parallel to the first plane and is vertical to the axis of the battery pack.

10. The hand-held power tool of claim 9, wherein: the electrode plates comprise a first electrode plate and a second electrode plate, the first electrode plate and the second electrode plate comprise at least two metal fragments, a first gap is formed between the two metal fragments of the first electrode plate, a second gap is formed between the two metal fragments of the second electrode plate, and the extending directions of the first gap and the second gap are overlapped.

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