CN217452391U - Electric tool - Google Patents

Abstract

The utility model discloses an electric tool, electric tool include casing and detachably install the group battery in casing one end, and the casing is including the base that has base engaging surface, and the group battery is including the group battery casing that has group battery engaging surface, and wherein, when the base of casing is installed to the group battery, base engaging surface and group battery engaging surface butt. Wherein at least one vibration dampening element extending vertically perpendicular to the battery pack engaging surface is provided between the base and the battery pack engaging surface. According to the utility model discloses an electric tool through set up the damping component between electric tool's casing and group battery casing, can realize the dismouting of group battery and electric tool casing with less assembly force, utilized these damping components moreover to the at utmost for damping effect maximize has realized electric tool's inseparable installation simultaneously.

Description

Electric tool

Technical Field

The utility model relates to an electric tool field especially relates to an install electric tool of group battery with adaptation.

Background

Power tools of the type such as hand-held cordless power tools are powered by, for example, detachable battery packs that have various shapes and sizes and are easily accommodated in the power tool. The body of the electric power tool is detachably connected to the battery pack via the connection terminals, but the reciprocating electric power tool such as an electric reciprocating saw inevitably generates vibration by itself during operation, and the reciprocating motion further aggravates the vibration of the body. The vibration can be conducted from the machine body to the battery pack through the connecting interface due to the detachable connection of the machine body and the battery pack, so that relative movement occurs between the machine body and the battery pack at the connecting position, the connection between the machine body and the battery pack becomes loose or even unstable, the abrasion of the conductive terminal is accelerated, the poor current conduction or even failure of the conductive terminal is caused, the power supply of the battery pack is influenced, and the vibration can damage the battery pack.

SUMMERY OF THE UTILITY MODEL

The utility model provides a modified electric tool has overcome the above-mentioned not enough of prior art through setting up the damping component.

The utility model discloses an electric tool, install the group battery in casing one end including casing and detachably, the casing is including the base that has base joint surface, the group battery is including the group battery casing that has group battery joint surface, wherein, works as the group battery is installed when the base of casing, base joint surface with group battery joint surface butt, wherein the base with be provided with the perpendicular to between the group battery joint surface at least one damping element of the vertical extension of group battery joint surface.

According to an embodiment of the invention, the battery pack housing comprises a boss extending perpendicular to the battery pack engagement surface, the boss having an opposite pair of boss sides, at least two the damping elements abutting against the pair of boss sides.

According to an embodiment of the invention, the base comprises a recess having a complementary shape to the boss, a cavity for accommodating a corresponding number of at least two of the damping elements being provided on a side wall of the recess.

According to an embodiment of the invention, the at least one damping element protrudes beyond the base engagement surface when the battery pack is not mounted to the base of the housing.

According to an embodiment of the invention, the damping element is made of an elastic material.

According to an embodiment of the invention, the at least one damping element is integrally formed with the base.

According to an embodiment of the invention, at least two of said damping elements are cylindrical in shape, and said cavity is semi-cylindrical in shape with a lateral opening.

According to an embodiment of the invention, the electric tool comprises two pairs of damping elements symmetrically abutting against the pair of boss sides.

According to an embodiment of the present invention, the power tool further comprises a third pair of vibration reduction elements spaced apart from the boss.

According to an embodiment of the invention, the battery pack comprises a protruding post extending perpendicular to the boss, the housing comprises a slot extending from the base to the inside of the housing having a shape complementary to the protruding post.

According to an embodiment of the invention the other end of the housing is provided with a collar for mounting or dismounting a machining tool, wherein the collar is provided with at least one lug on its periphery for rotating the collar.

The utility model discloses an electric tool through set up the damping component between electric tool's casing and group battery casing, can realize the dismouting of group battery and electric tool casing with less assembly force, utilized these damping components moreover to the at utmost for damping effect maximize has realized electric tool's inseparable installation simultaneously.

Drawings

Fig. 1 is a perspective view of an electric power tool according to the present invention.

Fig. 2 is a perspective view of a battery pack of an electric power tool according to the present invention.

Fig. 3 is a perspective view of a base of an electric tool according to the present invention.

Fig. 4 shows an assembly diagram of the battery pack and the vibration damping element in the mounted state of the power tool.

Fig. 5 shows the arrangement of the damping element in the base in the disassembled state of the power tool.

Fig. 6 shows a collar of a power tool according to the present invention.

Fig. 7 is a perspective view of another power tool according to the present invention.

Fig. 8 is a perspective view of a battery pack of the other power tool of fig. 7.

Fig. 9 is a perspective view of a base of the alternative power tool of fig. 7.

Fig. 10 is a perspective view of yet another power tool according to the present invention.

Fig. 11 is a perspective view of a battery pack of the further electric power tool of fig. 10.

Fig. 12 is a perspective view of a base of the further power tool of fig. 10.

Fig. 13 is a perspective view of a vibration reduction element of the further power tool of fig. 10.

Reference numerals: 100. 400, 500-power tool; 1-a shell; 1 a-a first housing, 1 b-a second housing; 2-a handle; 10-a base; 111-a base engagement surface; 12-a slot; 112-a groove; 112a, 112 b-groove sidewalls; 113-snap recesses; 114-a lug; 115. 119, 120-damping element cavity; 116a, 116 b-sidewall projections; 117-base front engagement surface; 118-a base front side engagement surface; 15. 16, 17-damping elements; 171-a base; 172-a projection; 173-a connecting part; 121-a retaining wall; 122-finger-like protruding wall; 20-a battery pack; 21-a battery pack housing; 211-a battery pack engaging surface; 212-a boss; 212a, 212 b-boss sides; 213-battery pack rear engagement surface; 214-snap button; 215-lug slots; 216 a-boss side recess; 217-battery pack front engagement surface; 218-battery pack front side engagement surface; 22-protruding posts; 23-an electrical terminal; 30-a collar; 31-lug.

Detailed Description

The following description, which is to be considered as exemplary and not restrictive, describes in detail preferred embodiments of the present invention and is provided for the purpose of limiting the invention and is not intended to limit the invention to the particular forms disclosed.

The utility model relates to an electric tool 100. The inventive concepts of the present invention are described herein with respect to reciprocating saws and the like, but are not limited thereto and the power tools may be other types of power tools known or otherwise conventional in the art, such as drills, hammers, hammer drills, other types of saws such as jigsaw, planers, drivers, milling cutters, grinders, angle grinders, vibratory finishing machines, garden tools, and/or multi-function tools, and the like, and accordingly, the inventive concepts herein are equally applicable to such power tools.

Fig. 1 is a perspective view of an electric power tool according to the present invention. The power tool 100 includes a housing 1 and a battery pack 20 detachably mounted at one end of the housing 1, the other end of the housing 1 is a processing tool, in some embodiments a saw blade, and the processing tool is provided with a collar 30 for mounting or dismounting the processing tool, as shown in fig. 6.

The case 1 has an elongated shape, and the overall extending direction thereof is defined as a vertical direction or a longitudinal direction, the end where the processing tool is located is defined as a top or upper end, and the end where the battery pack 20 is located is defined as a bottom or lower end. That is, the battery pack 20 is mounted on the bottom of the power tool 100. In addition, hereinafter described "front", "front" or "front" and "rear", "rear" or "rear" and other related terms indicating the front-rear direction and the like are described with respect to a working tool of an electric power tool, and one end of a battery pack or a base described below, which faces and is close to the working tool, is defined as a front end and may be referred to as front, and the like, and the other end opposite to the end is referred to as rear, and the like.

The housing 1 of the electric power tool 100 contains a power system and an output shaft driven by the power system. In some embodiments, the power system includes a motor housed within the housing 1, the motor driving the output shaft to perform a corresponding action.

The housing 1 includes a first housing 1a and a second housing 1b (shown in fig. 3) disposed in bilateral symmetry. The housing 1 comprises a handle 2 in a lower position, the handle 2 extending in a longitudinal direction. In some embodiments, the base 10 is provided at the bottom of the power tool 10 (i.e., at the end of the handle 2 remote from the housing 1).

As shown in fig. 2 to 5, the battery pack 20 is detachably mounted to the base 10. Fig. 2 is a perspective view of a battery pack of an electric power tool according to the present invention. The battery pack 20 includes a battery pack housing 21 that is hollow inside, and the housing may be designed accordingly according to the type of power tool and the number of battery cells required, and may be in various three-dimensional shapes, such as, but not limited to, a rectangular parallelepiped, a cube, a sphere, or other regular or irregular polygons. A plurality of rechargeable battery cells or battery packs may be accommodated in the closed space of the pack case 21. In some embodiments, the battery unit is preferably a lithium battery unit.

In the embodiment herein, the battery pack case 21 has a rectangular parallelepiped shape, and the battery pack therein supplies power to the electric power tool 100. Since the battery pack 20 can be detachably attached to the case 1, the battery pack case 21 and the case 1 have respective fitting shapes for attachment and detachment. Specifically, the battery pack case 21 has a battery pack engagement surface 211 at the top, a boss 212 vertically extending a certain height perpendicular to the battery pack engagement surface 211, and a protruding column 22 vertically extending a certain height perpendicular to the boss 212. The battery engaging surface 211 may be a unitary planar shape or may be a segmented surface having steps, and in some embodiments, the bosses 212 may not be present. In this context, the boss 212 may be in the shape of a rectangular boss, but is not limited thereto, and may also be a circular boss, a triangular boss, or other regular or irregular boss, and the height of the boss may also be designed according to the specific application. The top of the protruding column 22 is provided with a plurality of electric terminals 23, such as a positive terminal, a negative terminal, and a ground terminal. The battery pack case 21 and the electric terminals 23 and the like thereon may be referred to as a connection interface of the battery pack for coupling to the case 1.

Correspondingly, fig. 3 is a perspective view of a base of a power tool according to the present invention, wherein the base 10 includes a groove 112 having a shape complementary to the boss 212, and a slot 12 extending from the groove 112 toward the inside of the housing 1 and having a shape complementary to the protruding post 22. It is to be noted that, in the present embodiment, it is shown in fig. 3 that the base 10 includes the base engagement surface 111, and the base engagement surface 111 is not a plane having a correspondingly large area with the battery pack engagement surface 211, but a ring-shaped surface protruding with respect to the groove 112. The base engagement surface 111 is designed such that when the battery pack housing 21 is mounted to the base 10, only a portion of the area of the base 10 is in contact with the battery pack engagement surface 211 to achieve a firm abutment, whereas the larger base engagement surface 111, due to manufacturing and assembly tolerances, does not in turn completely and effectively come into close contact with the battery pack engagement surface 211, even to the contrary and results in a waste of material. The base engagement surface 111 is configured to save material and reduce manufacturing and tooling costs.

When the battery pack case 21 is mounted to the base 10, the protruding posts 22 are inserted into the slots 12, the bosses 212 are fitted into the grooves 112, the base engagement surfaces 111 abut the battery pack engagement surfaces 211, and the battery pack case 21 and the base 10 are connected together, for example, by mounting features (e.g., protrusions, threaded holes) on the protruding posts 22 and mating mounting features in the slots 12, while the electrical terminals 23 on the protruding posts 22 contact lugs in the slots 12 for current conduction and power supply of the battery pack 20. Accordingly, when the battery pack case 21 is detached from the base 10, the protruding columns 22 are pulled out from the insertion grooves 12, the electric terminals 23 are disengaged from the tabs in the insertion grooves 12, the bosses 212 are separated from the grooves 112, and the base engagement surface 111 is disengaged from the battery pack engagement surface 211. In this manner, the battery pack case 21 is in a plug-in fit with the base 10.

In order to damp or even eliminate the transmission of vibrations of the housing 1 to the battery pack 20, at least one damping element 15 is arranged between the two. Specifically, as shown in fig. 3, a plurality of cavities for accommodating at least one damping element 15 are provided on a pair of side walls 112a, 112b of the recess 112. Two pairs of damping elements 15 are shown, but not limited thereto, the number of damping elements 15 may be flexibly set depending on the specific application, for example only 1, 2, 3, 5, 7 or more or other numbers. The damping element 15 is shown in the figure as being cylindrical in shape, and correspondingly the cavity is in the shape of a half cylinder open sideways, which may be exactly half cylindrical in shape, but also less or more than half cylindrical, as long as the damping element 15 can be fitted into the cavity. For example, less than half a cylinder may facilitate quick and easy insertion of the damping element 15; while more than half a cylinder may be advantageous for more secure retention of the damping element 15, while more than half of the side of the damping element 15 may be exposed with a larger contact area with the boss 212 (as shown in fig. 4), thereby increasing the damping effect. Of course, other shapes of the damping element 15 are possible and fall within the scope of the invention, such as a rectangular parallelepiped shape, a conical shape or other regular or irregular shapes. Correspondingly, the cavity may also have other shapes, such as a rectangular parallelepiped shape, a conical shape or other regular or irregular shapes. The number of cavities may be the same as or greater than the number of damping elements 15, and more cavities may provide some mounting margin for the damping elements 15, i.e., the damping elements 15 may be selectively mounted in some of the cavities at appropriate positions. The damping element 15 may be formed integrally with the base 10, i.e. the damping element 15 may be formed in the cavity at the same time as the base 10 is processed, so that the design may be achieved by one mold, eliminating the need for additional mold design and manufacturing costs for processing the damping element 15.

The damping element 15 may be made of an elastic material, such as rubber or other material having elasticity. Further, the vibration damping member 15 may be implemented in the form of soft gel or the like instead of the rubber column, which is disposed on the entire outer circumference of the base 10, which may have the maximum vibration damping effect but may increase the force required to assemble the battery pack 20 and the base 10. While the solution of discrete damping elements 15 requires less assembly force for easy assembly and disassembly. Furthermore, the damping element 15 may have different heights (i.e. longitudinal dimensions) depending on the specific application parameters (e.g. the amount of damping required, the amount of assembly force etc.), for example but not limited to the range of 0.1mm to 4mm, such as 0.5mm, 1mm, 2mm, 3mm, preferably 1.2mm in the present embodiment. In addition to the above-mentioned longitudinal dimensions, the transverse dimensions (e.g. diameter) of the damping element 15 can also be designed accordingly, depending on the specific application parameters as described above.

In the disassembled state of the power tool 100, as shown in fig. 5, the vibration damping element 15 protrudes beyond the base engagement surface 111 by a certain length, and this design ensures that the vibration damping element 15 has a certain amount of compressive deformation when mounted, and thus a certain vibration damping effect. It should be noted that, in conjunction with fig. 4 and 5 and as described later, since the vibration damping member 15 protrudes from the base engagement surface 111 by a certain length in the direction of the longitudinal dimension, when the vibration damping member 15 is longitudinally compressively deformed, the transverse dimension thereof increases, and thus the contact surfaces of both end portions and the contact surface of the outer periphery of the vibration damping member 15 are simultaneously enlarged, increasing the vibration damping effect.

In the mounted state, for example, fig. 4 shows a schematic assembly of the battery pack and the vibration reduction element in the mounted state of the power tool, wherein the boss 212 has a pair of boss side surfaces 212a, 212b (as shown in fig. 2) which are opposite to each other, and the two pairs of vibration reduction elements 15 are shown to be symmetrically abutted against the pair of boss side surfaces 212a, 212b, that is, each of the boss side surfaces is abutted against two vibration reduction elements 15. However, without being limited thereto, only two damping elements 15 may be provided in abutment with a pair of boss sides 212a, 212b, i.e. one damping element 15 per boss side, or another number of damping elements 15 may be provided in abutment with a pair of boss sides, but also asymmetrically, e.g. a different number of damping elements 15 per boss side and/or the spacing distance between the damping elements 15 on each boss side may also be different and/or the damping elements 15 on one boss side and the damping elements 15 on the other boss side may also be aligned neither or only partly with respect to the central symmetry axis of the boss.

Further, since the pack case 21 has a rectangular parallelepiped shape, it is also exemplarily shown that a third pair of vibration reduction elements 15 may be included to be spaced apart from the bosses 212. These damping elements are arranged in a pair of cavities provided in front of the base 10 spaced from the recess 112. The pair of cavities is identical to the cavities in the groove 112 except for the placement. Thus, the description above of the cavity in the groove 112 is equally applicable to the cavity herein. Likewise, the number of these spaced-apart damping elements 15 can vary, for example only 1 or 3 or another number, and are arranged symmetrically or asymmetrically in the manner described above. Of course, the spaced-apart damping elements 15 may also not be included or may be arranged elsewhere on the base.

In the mounted state, one end of the damping element 15 is mounted in the cavity and the other end abuts on the battery pack engagement surface 211, and depending on the shape of the cavity, the side surfaces of the damping element 15 are more or less exposed from the cavity to abut on the boss side surfaces 212a, 212 b. These vibration damping members 15 fill the gap between the case 1 and the pack case 21, and by applying elastic damping force to the case 1 and the pack case 21 in the longitudinal direction and the lateral direction thereof, respectively, by compression, the contact area of the vibration damping members 15 is maximized, and the vibration damping members 15 are maximally utilized, thereby greatly damping vibration between the case 1 and the pack case 21.

In addition, in the present invention, the collar 30 is also improved. Fig. 6 shows a collar of a power tool according to the present invention, in contrast to the collar of the prior art, the collar 30 is provided on the outer circumference with lugs 31 for rotating the collar 30, which shows 5 lugs 31 arranged around the axis of the collar 30, but this is merely an example, and without limitation thereto, only 1 lug, a pair of lugs, 3 lugs, 4 lugs or a greater number of lugs may be provided, and these lugs may be arranged symmetrically or asymmetrically around the axis of the collar 30, for example, distributed entirely or partially evenly or unevenly on the outer circumference of the collar.

Fig. 7 is a perspective view of another power tool according to the present invention. The base and battery pack of this power tool 400 are substantially identical in construction to the power tool of fig. 1-5, and therefore share the same reference numerals as fig. 1-5, and the description of these identical parts will not be repeated, and only the differences therebetween will be described below.

As shown in fig. 8 to 9, the arrangement of the damping elements is different from that of fig. 1 to 5. Wherein the third pair of damping elements 15 arranged in front of the base 10 in fig. 1 to 5 remains, the damping elements arranged in the cavities of the recesses 112 are omitted. Alternatively, damping elements are additionally added at other positions of the base 10. Specifically, a damping element is added between the projecting post 22 and the rear region of the socket 12. The battery pack engaging surface 211 includes a battery pack rear engaging surface 213 located behind the protruding post 22, and a corresponding region of the chassis 10 (i.e., a region behind the recess 112) is provided with a vibration damping member 16, and when the battery pack 20 is mounted to the chassis 10, the vibration damping member 16 is located between the battery pack rear engaging surface 213 and the rear region of the chassis to damp vibration at that portion.

The damping element 16 differs from the damping element 15 and is therefore distinguished by different reference numerals. The damping element 16 is shown in the form of a rectangular block, the longitudinal dimension (i.e. thickness) of which may be adapted to the above description of the longitudinal dimension (e.g. height) of the damping element 15. For example, the vibration damping element 16 may protrude beyond the seat engagement surface 111 in the thickness direction and abut against the protruding post 22 in the mounted state, whereby the effect of an increase in the transverse dimension caused by longitudinal compressive deformation has been described above and will not be described in detail here. Of course, the damping element 16 may also not abut against the protruding column 22 in the mounted state, but only contact the battery pack rear engagement surface 213.

The rectangular parallelepiped shape of the damping element 16 is merely exemplary and may be other shapes, such as square, circular, triangular, or other regular or irregular shapes, which may be selected or modified depending on space constraints and structural arrangements. Various sizes and arrangement positions, etc. of the vibration damping element 16 may also be adjusted or modified accordingly, and the vibration damping element 16 may be arranged centrally along the mounting surfaces of the first and second housings 1a and 1b, but is not limited thereto, and may be provided offset from the mounting surfaces or on only one of the first and second housings 1a and 1 b. The damping element 16 can likewise be made of an elastic material, for example rubber or another material having elastic properties.

Unlike the damping element 15 being mounted in a cavity on the side wall of the recess 112 or on the base 10, the damping element 16 can be directly attached to the base, for example, by glue or the like, which is simple and easy to operate, and the additional mounting of the damping element on the base can be eliminated, so that the base is simple in structure, and the design cost and the manufacturing cost are reduced. Fig. 9 shows that no damping element is mounted in the recess of the recess 112, so that the provision of a recess for mounting the damping element 15 in the recess 112 can be dispensed with, which likewise makes the construction of the recess and thus of the base simple and reduces the design and production costs. Of course, it is also possible to mount the vibration damping elements 15 in the cavities of the grooves 112, so that the vibration damping elements are disposed at the front, middle and rear portions of the base, further increasing the vibration damping and cushioning effect between the base and the battery pack.

Fig. 10 is a perspective view of yet another power tool according to the present invention. The structure of the battery pack 20 and the base 10 of the power tool 500 is different from those of the two power tools. Other identical or similar basic components share the same reference numerals as in fig. 1 to 5, and the description above for these identical or similar components applies here as well. Therefore, the description of these same parts will not be repeated, and only the differences therebetween will be described below.

Referring specifically to fig. 11, the battery pack 20 includes a battery pack case 21, the battery pack case 21 having a battery pack engagement surface 211 at the top, and a boss 212 vertically extending to a certain height perpendicular to the battery pack engagement surface 211. The boss 212 is not provided with the protruding post 22, and a protruding snap button 214 is provided at the rear portion thereof and a plurality of lug insertion grooves 215 are provided at the front portion thereof. The boss 212 has an opposed pair of boss sides, only one of which 212a is shown (the other side of the boss being on the other side of the boss, being identical to side 212a except for the location), on which is provided a corresponding pair of boss side recesses, only one of which 216a is shown on side 212a, the other of which is on the other boss side. Further, the battery pack engagement surface 211 includes a battery pack front engagement surface 217 located in front of the boss 212 and a battery pack front-side engagement surface 218 disposed on the front side surface of the case 21 adjacent to the battery pack front engagement surface 217, the battery pack front engagement surface 217 being substantially perpendicular to the battery pack front-side engagement surface 218.

Correspondingly, fig. 12 is a perspective view of the base, the base 10 comprising a groove 112 having a complementary shape to the boss 212, and a snap recess 113 recessed from the groove 112 having a complementary shape to the snap button 214. A plurality of lugs 114 are arranged in the groove 112 at positions corresponding to the lug insertion grooves 215 of the boss 212, the number of the lugs 114 is the same as that of the lug insertion grooves 215, and a pair of side wall protrusions 116a and 116b which are matched with the boss side concave parts (for example, 216a) in shape are arranged on the groove side walls 112a and 112 b. The region of the chassis 10 located in front of the recess 112 is a chassis front engagement surface 117 corresponding to the battery pack front engagement surface 217 of the boss 212, the chassis 10 further comprises a chassis front engagement surface 118 arranged on the front side surface of the chassis 10 adjacent to the chassis front engagement surface 117, the chassis front engagement surface 117 being substantially perpendicular to the chassis front engagement surface 118.

When the battery pack 20 is mounted to the cradle 10, the boss 212 is fitted into the groove 112, the cradle engagement surface 111 abuts against the battery pack engagement surface 211, the pair of side wall protrusions 116a, 116b are inserted into the pair of boss side recesses (e.g., 216a), the snap button 214 is inserted into the snap recess 113, and the tab 114 is inserted into the tab insertion slot 215 for current conduction, so that the power supply of the battery pack 20 is realized. Further, the base front engagement surface 117 abuts the battery pack front engagement surface 217, and the base front side engagement surface 118 abuts the battery pack front side engagement surface 218.

In view of the structural features of the power tool itself and the connection area of the battery pack to the base shown in fig. 10, vibration transmission is mainly concentrated between the battery tab 114 and the tab insertion groove 215, between the base front engagement surface 117 and the battery pack front engagement surface 217, and between the base front engagement surface 118 and the battery pack front engagement surface 218. As described above, in order to damp or even eliminate the transmission of vibrations of the housing 1 to the battery pack 20, at least one damping element is provided between these regions and accordingly a structure is provided on the base for accommodating these damping elements.

The arrangement of the damping elements and the associated structures provided on the base are described in detail below, it being noted that the arrangement of these structures is considered in conjunction with the arrangement of the damping elements. In order to facilitate the display of the vibration reduction element and its related structure, fig. 11 shows a perspective view of the battery pack and shows the arrangement of the vibration reduction element on the battery pack in the mounted state, and fig. 12 shows a perspective view of the base and a structure provided on the base for accommodating the vibration reduction element, in conjunction with fig. 11 and 12.

As shown in fig. 11, vibration damping elements are provided on the above three regions, wherein a pair of vibration damping elements 15 are disposed in the vicinity of both sides of the lug insertion groove 215 for damping vibration between the lug 114 and the lug insertion groove 215 to prevent the connection therebetween from being loosened to thereby affect power supply to the tool; a pair of vibration damping elements 15 are arranged on the pack front engagement surface 217 in front of the bosses 212 for damping vibration transmitted from the case 1 to the partial region of the pack case 21; a pair of vibration damping members 17 are disposed on the front side surface of the battery pack against the pack front side engagement surface 218 for damping vibration transmitted from the housing 1 to the battery pack housing via the surface. The number and placement of these damping elements are merely examples, and these damping elements may be placed at other locations, or various numbers of damping elements may be provided or otherwise added at other locations, and in any case, varying numbers of damping elements may be provided at different locations depending on the particular configuration and application of the tool.

As can be seen from fig. 11, the pair of vibration damping members 15 disposed on the front engagement surface 217 of the battery pack is longer than the pair of vibration damping members 15 disposed near the tab insertion groove 215 on both sides of the tab insertion groove 215 apart from each other, so that the vibration damping effect is better, and the pair of longer vibration damping members 15 abut against each other to be in contact with each other, but this is merely an example, and they may be disposed apart from each other. Instead of the above-described vibration damping elements 15 being vertically arranged on the battery pack, the two pairs of vibration damping elements 15 lie on the battery pack case, taking a cylindrical vibration damping element as an example, the outer circumferential surface (not the end) of the vibration damping element 15 is in contact with the surface of the battery pack case, so that more surface area of the vibration damping element contacts the battery pack, and the outer circumferential surface rapidly expands when compressed, so that more outer circumferential surface spreads on the battery pack case, greatly increasing the vibration damping and cushioning effect. In addition, these damping elements may also be arranged in other orientations, for example, with the damping elements arranged obliquely on the battery housing such that their longitudinal direction is at various angles with respect to the battery engaging surface. Of course, these damping elements can also be arranged vertically on the battery pack as described above.

The damping element 17 differs from the damping element 15 described above and is therefore distinguished by different reference numerals. Referring specifically to fig. 13, the damping element 17 is a special-shaped piece, and includes a base portion 171, a pair of protruding portions 172 extending outward from the base portion 171, and a connecting portion 173 connecting between the pair of protruding portions 172. The base 171 may have a rectangular or square shape, and the pair of protrusions 172 and the connecting portion 173 may have an H-shaped or i-shaped beam form, which can better withstand the pressure caused by vibration, thereby having a greater vibration damping effect. Of course, this configuration of the damping element 17 is merely an example, and other shapes may be designed.

The receiving means provided for the damping element on the base are described below with reference to fig. 12. Two damping element cavities 115 are provided on both sides of the lug 114 in the groove 112 for receiving a pair of damping elements 15 shown in fig. 11 disposed on both sides of the lug insertion groove 215; a pair of longer vibration dampening element cavities 119 are provided on the base front engagement surface 117 for receiving the pair of longer vibration dampening elements 15 disposed on the battery pack front engagement surface 217; a pair of vibration damping member cavities 120 are provided on the base front side engagement surface 118 and are shaped to receive a pair of vibration damping members 17 disposed on the battery pack front side engagement surface 218.

In the state in which the battery pack is not mounted to the base, the damping elements 15 are housed in the cavities 115, 119, respectively, the damping elements 17 are housed in the cavities 120, and these damping elements may protrude outside the respective cavities; in the mounted state, the shorter pair of vibration damping members 15 are located between the cavity 115 and the boss region near the tab insertion groove 215, the longer pair of vibration damping members 15 are located between the cavity 119 and the battery pack front engagement surface 217, and the vibration damping members 17 are located between the cavity 120 and the battery pack front-side engagement surface 218, and these vibration damping members are compressed, thereby being deformed to damp the vibration transmitted from the housing to the battery pack at the respective regions.

It is shown in fig. 11 and 12 that the surface of the base 171 abuts against the chassis front-side engaging surface 118, the surfaces of the protrusion 172 and the connecting portion 173 abut against the battery pack front-side engaging surface 218, accordingly, the bottom of the cavity 120 accommodates the entire base 171, and the pair of protrusions 172 protrude from the cavity 120. In order to better retain the damping element 17 in the cavity 120, a pair of blocking walls 121 and a finger-like projecting wall 122 between the pair of blocking walls 121 are provided above the bottom of the cavity so that the cavity as a whole is complementary in shape to the damping element 17. Thus, when the damping element is seated in the cavity 120, the cavity bottom receives the base 171 and the base 171 is covered and blocked by the blocking walls 121 and the finger-like projection wall 122, the pair of projections 172 project from the space between the pair of blocking walls 121, and the finger-like projection wall 122 is located in the gap between the pair of projections 172 and the connecting portion 173, this complementary-shape design securely holds the damping element 17 in the seat against loose displacement or even falling out during tool movement.

As shown in fig. 12, the housing 1 is generally assembled from two half-shells that are symmetrical, so that the pair of cavities 119 and the pair of cavities 120 may be symmetrical with respect to the assembly plane of the two half-shells, respectively. One end of each cavity 119 and one end of each cavity 120 may be open ended, respectively, such that when the two half shells are assembled together, the respective open ends of the two cavities 119 may abut one another, allowing a pair of cavities 119 to communicate with one another, both forming a longer cavity. Similar to the pair of cavities 119, the pair of cavities 120 also communicate to form one cavity. In this case, in combination with fig. 11 and 12, since the pairs of damping elements are of identical design, the longer pair of damping elements 15 can be combined into a single longer damping element and be placed in one cavity 119 formed in communication, and likewise the pair of profiled damping elements 17 into a single damping element and be placed in one cavity 120 formed in communication. Of course, the arrangement of the pair of cavities 119 and 120 shown in the figures is merely an example, and they may be arranged so as to be spaced apart from each other after the housing is assembled, rather than communicating adjacent to each other; accordingly, the pair of damping elements 15 and 17 are thus also spaced apart from one another.

The present invention relates to a vibration damping element, and more particularly, to a vibration damping element having a shape, an arrangement position, an arrangement orientation, a number, a material composition, and the like, which is not limited to an example, but not limited to an arrangement of a vibration damping element between a battery pack and a base, and can be arranged in different positions according to the type, size, structure, and vibration damping requirements of an electric tool, as long as the vibration damping effect can be achieved in the electric tool and between different components, and the present invention is also within the spirit and scope of the present invention.

According to the utility model discloses an electric tool through set up the damping component between electric tool's casing and group battery casing, can realize the dismouting of group battery and electric tool casing with less assembly force, utilized these damping components moreover to the at utmost for damping effect maximize has realized electric tool's inseparable installation simultaneously.

Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Those skilled in the art can make various combinations, alterations, and modifications of the embodiments without departing from the principles and spirit of the invention, and such combinations, alterations, and modifications all fall within the scope of the invention.

Claims (11)

1. A power tool (100) comprising a housing (1) and a battery pack (20) removably mounted at one end of the housing (1), the housing (1) comprising a base (10) having a base engagement surface (111), the battery pack (20) comprising a battery pack housing (21) having a battery pack engagement surface (211), wherein the base engagement surface (111) abuts the battery pack engagement surface (211) when the battery pack (20) is mounted to the base (10) of the housing (1), characterized in that at least one vibration dampening element (15) is provided between the base (10) and the battery pack engagement surface (211) extending vertically perpendicular to the battery pack engagement surface (211).

2. The power tool (100) according to claim 1, wherein the battery pack housing (21) comprises a boss (212) extending perpendicular to the battery pack engagement surface (211), the boss (212) having an opposing pair of boss sides (212a, 212b), at least two of the damping elements (15) abutting against the pair of boss sides (212a, 212 b).

3. The power tool (100) according to claim 2, wherein the base (10) comprises a recess (112) having a complementary shape to the boss (212), a pair of side walls (112a, 112b) of the recess (112) being provided with a corresponding number of cavities for receiving at least two of the damping elements (15).

4. The power tool (100) according to claim 1, wherein the at least one vibration dampening element (15) protrudes beyond the base engagement surface (111) when the battery pack (20) is not mounted to the base (10) of the housing (1).

5. The power tool (100) according to any one of claims 1 to 4, wherein the damping element (15) is made of an elastic material.

6. The power tool (100) according to claim 1, wherein the at least one damping element (15) is integrally formed with the base (10).

7. A power tool (100) according to claim 3, wherein at least two of the damping elements (15) have a cylindrical shape and the cavity has a semi-cylindrical shape that is open laterally.

8. The power tool (100) according to claim 2, comprising two pairs of damping elements (15) symmetrically abutting against the pair of boss sides (212a, 212 b).

9. The power tool (100) of claim 8, further comprising a third pair of vibration dampening elements (15) spaced from the boss (212).

10. The power tool (100) according to claim 3, wherein the battery pack (20) comprises a protruding post (22) extending perpendicular to the boss (212), and the housing (1) comprises a slot (12) extending from the base (10) to the inside of the housing (1) having a shape complementary to the protruding post (22).

11. The power tool (100) according to claim 1, wherein a collar (30) for mounting or dismounting a working tool is provided at the other end of the housing (1), wherein the collar (30) is provided on its outer circumference with at least one lug (31) for rotating the collar (30).

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