WO2018219325A1

WO2018219325A1 - Power tool

Info

Publication number: WO2018219325A1
Application number: PCT/CN2018/089247
Authority: WO
Inventors: 张锐
Original assignee: 南京德朔实业有限公司
Priority date: 2016-06-01
Filing date: 2018-05-31
Publication date: 2018-12-06
Also published as: CN206869819U

Abstract

A power tool (10), comprising a working head (15), a motor (11), a casing (13), and a handle (12). The motor comprises a motor shaft defined with a central axis, and the motor shaft drives the working head to effect the functions of the power tool. The casing is used to contain or secure the motor. The handle is held by a user and comprises a handle housing. The handle housing is made of a first material and is provided with a receiving cavity. The power tool further comprises a handle self-vibration absorption device (16). The handle self-vibration absorption device comprises one handle self-vibration absorber. The handle self-vibration absorber is made of a second material different from the first material. The weight of the handle self-vibration absorber is less than the weight of the handle housing. The density of the handle self-vibration absorber is greater than or equal to 1 g/cm3 or is greater than the density of the handle housing. The size of the handle self-vibration absorber in the direction of the central axis is less than the size of the handle housing in the direction of the central axis, and the handle self-vibration absorber is at least partially located in the receiving cavity. The power tool has minimal vibration and is comfortable to hold.

Description

Power tool

Technical field

The present disclosure relates to a power tool, and in particular to a power tool having a self-damping function.

Background technique

The power tool includes a motor and a handle or a grip for gripping. Common power tools include: pruning machines, lawn mowers, lawn mowers, snow sweepers, angle grinders, electric hammers, electric drills, reciprocating saws, multi-tools, sanders, etc.

The motor is used to output a mechanical energy. The motor can be a fuel-powered internal combustion engine or a fluid-powered pneumatic machine, or an electric-powered motor. When powered by electricity, power tools can also be called power tools.

The user holds the handle or grip to operate the power tool to implement the tool function. The power tool inevitably generates vibration during work, and the vibration is transmitted to the user's hand through the handle. When the vibration is too large, the handle will be difficult to hold, which may interfere with the user's operation.

Summary of the invention

In order to solve the deficiencies of the prior art, it is an object of the present disclosure to provide a power tool having a self-damping function.

In order to achieve the above objectives, the present disclosure adopts the following technical solutions:

A power tool includes: a working head, a motor, a casing and a handle; the motor includes a motor shaft defining a central axis; the motor shaft drives the working head to implement the function of the power tool; the casing is for receiving or fixing the motor; The handle comprises a handle housing; the handle housing is made of a first material; the handle housing is formed with a receiving cavity; the power tool further comprises a handle self-absorbing device; the handle self-absorbing device comprises a handle self-absorbing body; The self-absorber body is made of a second material different from the first material; the weight of the handle self-absorbing body is smaller than the weight of the handle housing; the density of the handle self-absorbing body is greater than or equal to 1 g/cm ³ or greater than the density of the handle housing; The dimension of the self-absorber body in the direction of the central axis is smaller than the dimension of the handle housing in the direction of the central axis; the handle self-absorber body is at least partially located in the receiving cavity.

Further, the handle self-absorbing body is a mass; the handle self-absorbing device further comprises: a connecting member connecting the mass and the handle housing; and the connecting member is a spring.

Further, the handle self-absorbing body is a mass; the handle self-absorbing device further comprises: a connecting member connecting the mass and the handle housing; the connecting member is a spring; a damper connecting the mass and the handle housing.

Further, the handle self-absorbing body is a mass; the handle self-absorbing device further comprises: at least two connecting members connecting the mass and the handle housing; the connecting member is a spring; and the two connecting members are disposed on the same side of the mass.

Further, the handle self-absorbing body is a mass; the handle self-absorbing device further comprises: at least two connecting members connecting the mass and the handle housing; the connecting member is a spring; the two connecting members are disposed on opposite sides of the mass .

Further, the handle is self-absorbing body as a liquid; the power tool or the handle is formed by the vibration absorbing device with a receiving chamber for accommodating the liquid.

Further, the handle self-absorber is a liquid; the power tool or the self-vibration device is formed with a receiving chamber for accommodating the liquid; the handle self-absorbing device further comprises: a damping member disposed in the receiving cavity; the damping member is a mesh structure.

Further, the handle self-absorbing body is made of a magnet; the handle self-absorbing device further comprises: a connecting member; the connecting member applies a force to the handle from the vibration absorbing body; and the connecting member is made of a magnet.

Further, the handle self-absorbing body is made of a magnet; the handle self-absorbing device further comprises: at least two connecting members; the connecting member applies a force to the handle from the vibration absorbing body; and the connecting member is made of a magnet.

Further, the handle self-absorbing body is made of a magnet; the handle self-absorbing device further comprises: a connecting member; the connecting member applies a force to the handle from the vibration absorbing body; and the connecting member is an electromagnet.

The present invention is advantageous in that the handle self-absorption device can reduce the vibration of the power tool, and can reduce the vibration of the handle to make the user's grip comfortable.

DRAWINGS

Figure 1 is a schematic view of a power tool as an embodiment;

Figure 2 is a partial enlarged view of the power tool of Figure 1;

Figure 3 is a schematic view of another handle self-absorbing device;

Figure 4 is a schematic view of another handle self-absorbing device;

Figure 5 is a schematic view of another handle self-absorbing device;

Figure 6 is a schematic view of another handle self-absorbing device;

Figure 7 is a schematic view of another handle self-absorbing device;

Figure 8 is a schematic view of another handle self-absorbing device;

Figure 9 is a schematic view of another handle self-absorbing device;

Figure 10 is a schematic view of another handle self-absorbing device;

Figure 11 is a schematic view of another handle self-absorbing device;

Figure 12 is a schematic view of another handle self-absorbing device;

Figure 13 is a schematic view of another handle self-absorbing device;

Figure 14 is a schematic view of a pruning machine as an embodiment;

Figure 15 is a schematic view of a lawnmower as an embodiment;

Figure 16 is a schematic view of a lawn mower as an embodiment;

Figure 17 is a schematic view of an electric hammer as an embodiment;

Figure 18 is a schematic view of a hammer drill as an embodiment;

Figure 19 is a schematic view of an angular grinder as an embodiment;

Figure 20 is a schematic view of a reciprocating saw as an embodiment;

Figure 21 is a schematic view of a multifunctional tool as an embodiment;

Figure 22 is a schematic view of a sander as an embodiment;

Figure 23 is a schematic view of another sander as an embodiment;

Figure 24 is a schematic illustration of another pruning machine as an embodiment:

Figure 25 is a schematic view showing the comparison between the vibration amplitude of a conventional power tool and the motor speed;

Figure 26 is a schematic view showing the comparison of the vibration amplitude of the power tool with the handle self-absorbing device and the motor rotation speed.

detailed description

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

As shown in FIGS. 1 and 2, a power tool 10 includes a motor 11, a handle 12, a casing 13, a battery pack 14, and a working head 15. The motor 11 is used to output mechanical energy. The motor 11 includes a motor shaft. The motor shaft is defined by a central axis. The motor shaft rotates about a central axis. The motor shaft drives the working head 15 to implement the function of the power tool. Specifically, the motor 11 is a motor and the battery pack 14 supplies power to the motor. The power tool 10 can also be referred to as a power tool. The handle 12 is held by a user to operate the power tool 10. The power tool 10 can also be referred to as a hand held tool. The casing 13 is for housing or fixing the motor 11. The motor 11 drives the working head 15 to operate. The working head 15 is used to perform tool functions or to clamp a stationary work attachment. Specifically, the power tool 10 is a nail gun, and the nail is attached to the work head 15. As an embodiment, the handle 12 is formed by the casing 13 as part of the casing 13. As another embodiment, the handle 12 can also be coupled to the housing 13 as a separate component. The power tool 10 also includes a handle self-absorbing device 16. The handle self-absorption device 16 is used to absorb or reduce the vibration of the power tool 10. A handle self-absorption device 16 is disposed inside the handle 12 to absorb or reduce the vibration of the handle 12. The handle self-absorption device includes a handle self-absorbing body. The handle self-absorber is a mass 17. Or the mass 17 acts as a handle self-absorbing body. Specifically, the handle self-absorption device 16 includes a mass 17 and a connector 18. The mass 17 has a mass and the connector 18 connects the mass 17 to the handle 12. The mass 17 is located inside the handle 12. The handle 12 includes a handle housing. The handle housing is formed with a receiving cavity. The size of the handle self-absorber in the direction of the central axis is smaller than the dimension of the handle housing in the direction of the central axis. The handle self-absorbing body is at least partially located in the receiving cavity. The mass 17 is located within the receiving cavity. The handle self-absorber body is movable relative to the handle housing. The handle housing is made of a first material. The handle self-absorber body is made of a second material different from the first material. Specifically, the first material is a plastic material. The second material is a metallic material. The weight of the handle self-absorbing body is smaller than the weight of the handle housing. The density of the handle self-absorber is greater than the density of the handle housing. The mass 17 is a metal block and the connector 18 is a spring.

During operation, when the handle 12 vibrates in the direction indicated by the arrow M1, the handle 12 is moved to the right, the compression spring applies a rightward force to the mass 17, and the mass 17 applies a direction along the arrow M2 to the handle. Force or leftward force, the direction of M2 is opposite to the direction of M1. Under the action of the connecting member 18, the mass 17 is reciprocated relative to the handle 12 so that the vibration of the handle 12 can be balanced, and the user can hold the handle more comfortably. Similarly, when the vibration direction of the handle 12 is reversed, the force of the mass 17 against the handle 12 is also reversed, so that the vibration damping effect can be maintained at all times. Further, when the handle 12 is moved in the direction indicated by the arrow M3, the mass 17 applies a force in the M4 direction to the handle through the connecting member 18, and the mass 17 reciprocates in the directions of M4 and M3, also achieving vibration reduction. The role. Further, in the direction perpendicular to the arrow M1 and the arrow M3, that is, in the direction perpendicular to the plane of the paper, the effect of damping can be achieved as well.

As an alternative embodiment, the power tool 10 can also be provided with a plurality of handle self-absorbing devices 16 . The mass 17 can be placed at a different location on the power tool 10, such as within the housing 13.

The spring itself has some damping, but its damping is relatively small, negligible compared to larger damping. As a specific embodiment, as shown in FIG. 3, the handle self-absorbing device 26 further includes a mass 27, a connecting member 28, and a damper 29. The damper 29 has a relatively large damping, and the damper 29 absorbs the energy of the vibration, and can quickly stop the vibration of the power tool 20 and reduce the amplitude of the vibration.

As shown in FIG. 4, as a further alternative embodiment, the handle of the power tool 30 can also be provided with a plurality of connecting members 38 from the vibration absorbing device 36. The connecting member 38 is a spring, and the connecting member 38 is connected to the mass 37. A plurality of connectors 38 are located on the same side of the mass 37.

As shown in FIG. 5, as another alternative embodiment, the handle self-absorbing device 46 of the power tool 40 includes a plurality of connecting members 48, the connecting member 48 is a spring, and the connecting member 48 is connected to the mass 47, and the plurality of connections The pieces 48 are located on both sides of the mass 47. Can improve the stability of the system.

In the case of a compression spring, in the direction of expansion and contraction of the spring, the force exerted by the spring is large, and in the direction of expansion and contraction perpendicular to the spring, the force exerted by the spring deformation is relatively small. Alternatively, the spring has a spring constant in its direction of expansion and contraction that is greater than a coefficient of elasticity that is perpendicular to the direction of expansion and contraction of the spring. That is to say, in the direction of expansion and contraction of the spring, the vibration absorption effect of the handle self-absorbing device is better. As an alternative embodiment, as shown in FIG. 6, the handle self-absorbing device 56 of the power tool 50 includes a mass 57 and a plurality of sets of

connectors

58a, 58b. The

connectors

58a, 58b are springs. Two connecting members 58a are respectively connected to both ends of the mass 57, and two connecting members 58b are respectively connected to the other ends of the mass 57. The two connecting members 58a expand and contract in the X1 direction, and the two connecting members 58b expand and contract in the X2 direction. The X1 direction is perpendicular to the X2 direction, and the handle self-vibration device 56 can have a better vibration damping effect in the plane formed by X1 and X2.

As another embodiment, as shown in FIG. 7, the handle self-absorption device 66 of the power tool 60 includes a mass 67 and a plurality of sets of connectors 68a, 68b, 68c. The mass 67 is a metal block, and the plurality of sets of connectors 68a, 68b, 68c are springs. The two connecting members 68a are expanded and contracted in the Y1 direction, the two connecting members 68b are expanded and contracted in the Y2 direction, and the two connecting members 68c are expanded and contracted in the Y3 direction. The Y1, Y2, and Y3 directions are perpendicular to each other, thereby achieving a better damping effect in space.

As another embodiment, as shown in FIG. 8, the power tool 70 includes a handle self-absorbing device 76. The handle self-absorption device 76 includes a mass 77, a connector 78a, and a connector 78b. The mass 77 is a N-pole and an S-pole at both ends of the magnet, and the connecting member 78a and the connecting member 78b are also magnets, and the opposite end of the mass 77 is magnetically opposite, in the direction or direction of the power tool 70 in the direction of the arrow N1. When vibrating in the right direction, the mass 77 is subjected to a repulsive force in the rightward direction to be greater than the leftward repulsive force, that is, the mass 77 is entirely subjected to the force in the rightward direction, and the mass 77 applies a direction to the power tool 70 through the joint 78n. Left or force in the N2 direction. During the vibration process, the mass 77 reciprocates relative to the casing or the joint of the power tool 70 to achieve vibration reduction. The connecting member 78a and the connecting member 78b may be permanent magnets or electromagnets.

As another embodiment, as shown in FIG. 9, the power tool 80 includes a handle self-absorption device 86 that includes a mass 87 and a connector 88. The connector 88 is an electromagnet, and the mass 87 is a metal block or a magnet. The power tool 80 further includes a detecting device for detecting vibration of the power tool 80, and a control device controlling the magnitude or direction of the suction of the electromagnet according to the result detected by the detecting device, thereby controlling the movement of the mass 87. The power tool 80 is subjected to a force from the mass 87 which is opposite to the vibration direction of the power tool 80, so that the vibration can be reduced.

As another embodiment, the power tool includes a motor, a working head, a handle self-absorption device, a detecting device, and a control device. The motor drives the working head to work. The detecting device is configured to detect the vibration of the power tool, and the control device controls the handle self-absorbing device according to the detection result of the detecting device. The handle self-absorbing device includes a mass, and the motor drives the mass to drive the mass in a direction opposite to the vibration direction of the power tool. Thereby reducing the vibration. The power tool can have one motor or multiple motors, the same motor can be used to drive the working head and the mass or the different motor can be used to drive the working head and mass.

As an embodiment, as shown in FIG. 10, the power tool 90 includes a handle self-absorbing device 96. The handle self-absorption device 96 includes a handle self-absorbing body 97. The handle self-absorber is liquid 97. The power tool 90 or the handle from the vibration absorbing device 96 is formed with a receiving chamber for containing the liquid 97. When the power tool 90 vibrates in one direction, the liquid 97 moves in the opposite direction, and a force in the opposite direction is applied to the cavity wall of the accommodating cavity, and the liquid reciprocates in the accommodating cavity, and the vibration damping effect can also be achieved. The density of the handle self-absorber, that is, the liquid is greater than or equal to 1 g/cm ³ .

As another embodiment, as shown in FIG. 11, the power tool 91 includes a handle self-absorbing device 92. The handle self-absorption device 92 includes a liquid 93. Compared with the solution shown in FIG. 10, the solution further includes a damping member 94. Specifically, the damping member 94 is a mesh structure, the liquid 93 can pass through the mesh structure, and the liquid 93 passes through the mesh structure, and the mesh structure It acts as a damping and consumes the energy of vibration.

As another embodiment, as shown in FIG. 12, the power tool 100 includes a handle self-absorption device 106. The handle self-vibration device 106 includes a vibration absorbing member 107. The vibration absorbing member 107 is a spring, and the weight of the spring itself functions as a mass. Can achieve the effect of vibration reduction.

As another embodiment, as shown in FIG. 13, the power tool 110 includes a handle self-absorption device 116, the handle self-vibration device 116 includes a vibration absorbing member 117, the vibration absorbing member 117 is a spring piece or a rib position, and the vibration absorbing member 117 is configured in a cantilever beam form. It can move within a certain range and can also achieve the effect of vibration reduction. The weight of the vibration absorbing member 117 itself functions as a mass.

As a specific embodiment, as shown in FIG. 14, the power tool 120 is a pruning machine. The power tool 120 includes a motor 121, a handle 122, a casing 123, a battery pack 124, and a blade 125. Motor 121 is used to output mechanical energy. Specifically, motor 121 is a motor and battery pack 124 provides power to the motor. The motor 121 is located inside the casing 123. The battery pack 124 is detachably connected to the casing 123. The handle 122 includes a front handle 122a that is coupled to the cabinet 123 and a rear handle 122b that is formed by the cabinet 123. The power tool 120 also includes a handle self-absorbing device 126. The handle self-absorption device 126 is used to absorb or reduce the vibration of the front handle 122a. The handle self-absorption device 126 can adopt any of the modes of FIGS. 2 to 13. The handle self-absorption device 126 is disposed inside the front handle 122a. Or the handle is fixed to the front handle 122a from the vibration absorbing device 126. As another embodiment, the power tool 120 can also be provided with a plurality of handle self-absorbing devices 126 to reduce the vibration of the front handle 122a. As another embodiment, the power tool 120 can also be provided with a plurality of handle self-absorbing devices 126. The front handle 122a and the rear handle 122b are respectively provided with a handle self-absorbing device 126.

As another embodiment, as shown in FIG. 15, the power tool 130 is a grass cutter, and the handle self-vibration device 136 is disposed on the front handle 132a. The handle self-absorption device 136 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 16, the power tool 140 is a hand-pushing tool, which may also be referred to as a rear-traveling tool. Specifically, the power tool 140 is a lawn mower. The handle self-absorption device 146 is placed in the handle 142. The handle self-absorption device 146 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 17, the power tool 150 is an electric hammer, and the power tool 150 includes an auxiliary handle 152a, and the handle is disposed in the auxiliary handle 152a from the vibration absorbing device 156. The handle self-absorption device 156 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 18, the power tool 160 is an electric drill, specifically, a hammer drill. The power tool 160 includes an auxiliary handle 162a, and the handle is disposed in the auxiliary handle 162a from the vibration absorbing device 166. The handle self-absorption device 166 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 19, the power tool 170 is an angle grinder, and the power tool 170 includes an auxiliary handle 172a, and the handle is disposed in the auxiliary handle 172a from the vibration absorbing device 176. The handle self-absorption device 176 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 20, the power tool 180 is a reciprocating saw, and the power tool 180 includes a main handle 182a, and the handle is disposed from the vibration absorbing device 186 in the auxiliary handle 182a. The handle self-absorption device 186 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 21, the power tool 190 is a multi-function tool, and the power tool 190 includes a casing 193. The casing 193 forms a handle 192. The handle self-absorption device 196 is disposed in the casing 193. Specifically, the handle is disposed in the handle 192 from the vibration absorbing device 196. The handle self-absorption device 196 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 22, the power tool 200 is a sander, and the power tool 200 includes a casing 203. The casing 203 forms a handle 202. The handle self-vibration device 206 is disposed in the casing 203. Specifically, the handle is disposed in the handle 202 from the vibration absorbing device 206. The handle self-absorption device 206 can adopt any of the modes of FIGS. 2 to 13.

As another embodiment, as shown in FIG. 23, the power tool 210 is a sander, and the power tool 210 includes a casing 213. The casing 213 is formed with a grip for the user to hold. The handle self-vibration device 216 is disposed in the casing 213. Specifically, the handle is disposed in the grip portion from the vibration absorbing device 216, and the handle is disposed on the top of the casing 213 from the vibration absorbing device 216. The handle self-absorption device 216 includes a liquid 217. The casing 213 is formed with a receiving chamber for containing the liquid 217. The handle self-absorption device 216 is in the same manner as in FIG.

As another embodiment, as shown in FIG. 24, the power tool 220 is a pruning machine, and the power tool 220 includes a motor 221, a handle 222, a casing 223, and a blade 225. The motor 221 is for outputting mechanical energy, and the motor 221 is located inside the casing 223. The handle 222 includes a front handle 222a and a rear handle 222b. The front handle 222a is coupled to the casing 223 by a handle from the vibration absorbing device 226, and the rear handle 222b is formed by the casing 223. The handle self-absorbing device 226 can absorb or reduce the vibration of the handle 222a. The handle self-absorbing device 226 can adopt any one of the methods of FIGS. 2 to 13.

As shown in FIG. 25, for the conventional power tool, the vibration amplitude A increases as the motor rotation speed ω increases, and the rotation speed ω1 to the rotation speed ω2 is the operating speed range of the power tool, and the rotation speed ω2 is greater than the rotation speed ω1, and the vibration amplitude thereof. A2 is greater than A1. As shown in Fig. 26, the self-absorption device of the handle mentioned in the present specification is installed in the power tool to change the relationship between the vibration amplitude and the rotational speed. In the range of the working speed ω1 to the rotational speed ω2 of the power tool, the overall vibration amplitude is significantly smaller than that of the conventional power tool. Thereby the effect of reducing vibration is achieved. Further, a rotational speed ω3 between the rotational speed ω1 and the rotational speed ω2, the vibration amplitude of which is at least A5 is significantly smaller than the rotational speed A4 corresponding to the amplitude A3 and the minimum rotational speed ω1 of the power tool at its maximum rotational speed ω2. A3, A4, and A5 are all smaller than A1.

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

Industrial applicability

The present disclosure provides a power tool that uses a hand-self-absorbing device to make the power tool less vibrating and comfortable to hold.

Claims

A power tool comprising: a working head, a motor, a casing and a handle;

The motor includes a motor shaft defining a central axis; the motor shaft drives the working head to perform the function of the power tool; the housing is for receiving or fixing the motor; the handle is for a user to hold ;

It is characterized by:

The handle comprises a handle housing; the handle housing is made of a first material; the handle housing is formed with a receiving cavity; the power tool further comprises a handle self-absorbing device; the handle self-absorbing device comprises a a handle self-absorbing body; the handle self-absorbing body is made of a second material different from the first material; the weight of the handle self-absorbing body is smaller than the weight of the handle housing; the handle is self-absorbing body a density greater than or equal to 1 g/cm 3 or greater than a density of the handle housing; a dimension of the handle self-absorbing body in the central axis direction is smaller than a dimension of the handle housing in the direction of the central axis; The handle self-absorbent body is at least partially located within the receiving cavity.
The power tool according to claim 1 wherein:

The handle self-absorbing body is a mass;

The handle self-absorbing device further includes:

a connecting member connecting the mass and the handle housing;

The connector is a spring.
The power tool according to claim 1 wherein:

The handle self-absorbing body is a mass;

The handle self-absorbing device further includes:

a connecting member connecting the mass and the handle housing;

a damper connecting the mass and the handle housing;

The connector is a spring.
The power tool according to claim 1 wherein:

The handle self-absorbing body is a mass;

The handle self-absorbing device further includes:

At least two connectors connecting the mass and the handle housing;

The connecting member is a spring;

Two of the connectors are disposed on the same side of the mass.
The power tool according to claim 1 wherein:

The handle self-absorbing body is a mass;

The handle self-absorbing device further includes:

At least two connectors connecting the mass and the handle housing;

The connecting member is a spring;

Two of the connectors are disposed on opposite sides of the mass.
The power tool according to claim 1 wherein:

The handle self-absorbing body is a liquid;

The power tool or the self-absorption device is formed with a receiving chamber that houses the liquid.
The power tool according to claim 1 wherein:

The handle self-absorbing body is a liquid;

The power tool or the handle self-absorbing device is formed with a receiving cavity for accommodating the liquid;

The handle self-absorbing device further includes: a damping member disposed in the receiving cavity;

The damper member is a mesh structure.
The power tool according to claim 1 wherein:

The handle self-absorbing body is made of a magnet;

The handle self-absorbing device further includes: a connecting member;

The connecting member applies a force to the handle from the vibration absorbing body;

The connector is made of a magnet.
The power tool according to claim 1 wherein:

The handle self-absorbing body is made of a magnet;

The handle self-absorbing device further includes: at least two connecting members; the connecting member applies a force to the handle from the vibration absorbing body;

The connector is made of a magnet.
The power tool according to claim 1 wherein:

The handle self-absorbing body is made of a magnet;

The handle self-absorbing device further includes: a connecting member;

The connecting member applies a force to the handle from the vibration absorbing body;

The connector is an electromagnet.