CN210010933U

CN210010933U - Power tool

Info

Publication number: CN210010933U
Application number: CN201920183707.9U
Authority: CN
Inventors: 钱富; 钟红风; 张士松
Original assignee: Baoshide Technology (china) Co Ltd
Current assignee: Baoshide Technology (china) Co Ltd; Positec Technology China Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2020-02-04
Anticipated expiration: 2029-02-01
Also published as: WO2020155854A1

Abstract

The utility model provides a power tool, which comprises a motor; an output shaft driven by the motor for mounting the working head; a housing including an inner housing and an outer housing, the inner housing at least partially housing the motor; a vibration damping mechanism is arranged between the outer shell and the inner shell, the vibration damping mechanism at least comprises a first damping part and a second damping part, the two damping parts are at least partially overlapped, and the isolating part is arranged between the first damping part and the second damping part. The utility model provides a set up the separator at two damping pieces among the power tool, when effectively improving the travelling comfort of operation, prolonged damping piece life.

Description

Power tool

Technical Field

The present invention relates to a power tool.

Background

The present invention relates to a power tool, and more particularly, to a power tool, which includes a housing, a motor accommodated in the housing, an output shaft for mounting a working head, and an eccentric transmission mechanism connected between the motor and the output shaft. Therefore, after the free end of the output shaft is connected with different accessory working heads, such as a straight saw blade, a circular saw blade, a triangular sanding disc and the like, the swing power tool can realize various operations, such as sawing, cutting, grinding, scraping and the like, so as to adapt to different working requirements.

However, the oscillating power tool inevitably generates large vibrations during operation. The motor is directly arranged on the housing and the operator often holds the motor directly on the housing during operation, so that vibrations are transmitted from the tool to the operator. Thus affecting the operational comfort of the oscillating power tool.

In addition, because the swinging frequency of the working head of the multifunctional swinging tool is very high, an operator cannot clear the swinging frequency to judge the degree of the working head on the material. For example, when cutting, the working head is a saw blade, and the multifunction swing tool generates a cutting action by a high-speed swing of the saw blade, and since the operator cannot clearly judge the boundary position and the cutting depth of the cut, the size after cutting may not be an intended result, and therefore, an illumination device is required to illuminate the working head and the work material thereof.

Therefore, there is a need for a new power tool to solve the above problems.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the power tool with good vibration reduction effect and long service life.

In order to solve the problems, the technical scheme of the invention is as follows:

a power tool, the power tool comprising:

a motor, said motor including a motor axis; the output shaft is driven by the motor, and one end of the output shaft is connected with the working head; the shell comprises an inner shell and an outer shell, the inner shell is used for accommodating the motor and at least one part of the output shaft, the outer shell comprises a longitudinal axis, and the inner shell and the outer shell are arranged at intervals; a vibration damping mechanism including at least a first damping member and a second damping member, the second damping member acting in a direction substantially perpendicular to the motor axis or the longitudinal axis, the first damping member being substantially perpendicular to the direction of action of the second damping member, the first damping member and the second damping member at least partially overlapping in the direction perpendicular to the motor axis or the longitudinal axis; an isolator disposed at least partially between the first damping member and the second damping member.

Preferably, at least one of the material and the density of the first damping member is different from that of the second damping member.

Preferably, at least one of the material and the density of the isolation member is different from that of the first damping member and the second damping member, and the isolation member is preferably made of a rigid material.

Preferably, the power tool further comprises a first support mechanism and a second support mechanism, the first support mechanism is provided on one of the inner housing and the outer housing, the second support mechanism is provided on the other, and the first support mechanism and the second support mechanism are between the inner housing and the outer housing; the first supporting mechanism comprises a first supporting part and a first limiting part, and the second supporting mechanism comprises a second supporting part and a second limiting part which correspond to each other.

Preferably, the first support portion and the second support portion support the second damping member in a direction substantially perpendicular to the motor axis or the longitudinal axis; the first limiting part comprises one of a protruding part and a recessed part, the second limiting part comprises the other of the protruding part and the recessed part, and the first limiting part and the second limiting part are matched to limit the inner shell to move relative to the outer shell in a direction approximately perpendicular to the action direction of the second damping part.

Preferably, the first damping part is located between the first limit part and the second limit part, and the second damping part is located between the first support part and the second support part.

Preferably, the first damper is housed in the recess, the first damper includes a hollow portion, and the protrusion portion is fitted to the recess through the through hole.

Preferably, the height of the first damping member is not greater than the depth of the recess.

Preferably, the sidewall of the through hole includes an extension portion extending in the radial direction, and the extension portion is in contact with the protrusion portion to perform a vibration damping function during the operation of the power tool.

Preferably, the second damping member includes a through hole, the protrusion passes through the through hole and the through hole to be matched with the recess, and the second damping member is located between the first supporting portion and the second supporting portion.

Preferably, the second damping member is disposed outside the recess, and the first damping member and the second damping member at least partially overlap.

Preferably, the isolation member is located between the first damping member and the second damping member, the isolation member includes an opening, and the protrusion passes through the through hole, the opening, and the through hole to be matched with the recess.

Preferably, a projection of the second damping member in a plane perpendicular to the motor axis or the longitudinal axis falls within a projection range of the spacer in the plane.

Another technical problem to be solved by the present invention is to provide a power tool having a good vibration damping effect and an illumination device,

the power tool further comprises an illuminating device, the illuminating device is arranged on one side, close to the working head, of the outer shell or the inner shell, and a power supply line of the illuminating device is arranged on the shell which is the same as the illuminating device.

Preferably, a wire clamping groove is formed in the inner surface of the outer shell or the outer surface of the inner shell, the power supply wire is arranged in the wire clamping groove, and preferably, when the lighting device is fixed on the outer shell, the wire clamping groove is arranged on the outer shell; when the lighting device is fixed on the inner shell, the wire clamping groove is arranged on the inner shell.

According to the power tool, the isolating piece is added on the vibration reduction mechanism, so that the abrasion or fracture of the damping piece of the vibration reduction mechanism caused by local depression generated by tool vibration is prevented, the service life of the damping piece is prolonged, and the vibration reduction effect is ensured; in addition, a lighting device is additionally arranged between the outer shell or the inner shell and the outer shell to provide better lighting for determining the cutting working condition, and preferably, when the lighting device is fixed on the outer shell, the wire clamping groove is arranged on the outer shell; when the lighting device is fixed on the inner shell, the wire clamping groove is arranged on the inner shell, so that the dislocation or breakage of the power supply wire caused by tool vibration is prevented.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic view of an oscillating power tool of the present invention with one half of the outer housing removed.

Fig. 2 is a partial perspective view of the oscillating power tool transmission mechanism of fig. 1.

Fig. 3 is a partial exploded perspective view of the oscillating power tool of fig. 1.

Fig. 4 is a cross-sectional view of the oscillating power tool of fig. 1 taken along line a-a.

Fig. 5 is a schematic view of the damping mechanism under stress, where fig. 5a is a schematic view of the damping mechanism under a state of no stress, and fig. 5b is a schematic view of the damping mechanism under a stress along the direction of arrow "C".

FIG. 6 is a schematic view of the outer housing of the swing power tool with an illumination device according to the present invention.

FIG. 7 is a schematic view of another embodiment of an oscillating power tool inner housing of the present invention with an illumination device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the present embodiment, the technical solution of the present invention is described by taking an oscillating power tool as an example, but the power tool of the present invention is not limited to the oscillating power tool, and may be a rotary power tool, such as a sander or an angle grinder.

Referring to fig. 1 to 5, the swing power tool 100 includes an outer housing 20, an inner housing 22 extending from one end of the outer housing 20, a motor 24 disposed in the inner housing 22, a transmission mechanism 30 connecting the motor 24 and an output shaft 26, a working head 29 mounted on a distal end of the output shaft 26, and a clamping assembly 28 for clamping the working head 29 to the output shaft 26. The longitudinal axis of the outer housing 20 is X1, and the axis of the motor 24 is X2. The vibration damping mechanism 50 includes a first damper member 52 and a second damper member 54, the second damper member 54 acting in a direction substantially perpendicular to the longitudinal axis X1 or the motor axis X2, the first damper member 52 acting in a direction substantially perpendicular to the second damper member 54, the first damper member 52 and the second damper member 54 at least partially overlapping in a direction perpendicular to the longitudinal axis X1 or the motor axis X2, and an isolator 56 disposed between the first damper member 52 and the second damper member 54. The first and

second support mechanisms

42, 44 are disposed on one of the outer and

inner housings

20, 22, respectively, and the first and

second support mechanisms

42, 44 cooperate to substantially mechanically decouple the inner and outer housings while limiting movement of the outer housing 20 relative to the inner housing 22 in a direction perpendicular to the second damping member 54. The vibration damping mechanism 50, in cooperation with the first support mechanism 42 and the second support mechanism 44, can effectively damp the vibration transmitted from the inner casing 22 to the outer casing 20.

Referring to fig. 1, the inner housing 22 includes a head housing 222 at least partially housing the output shaft 26, and a motor housing 224 coupled to the head housing 222. The motor housing 224 is used to mount the motor 24, and the motor 24 has a motor shaft 25 (see fig. 3). The motor housing 224 may be designed to partially or completely enclose the motor 24 as desired. The head housing 222 and the motor housing 224 may be made of metal or plastic as desired.

Referring to fig. 2, an eccentric transmission mechanism 30 is provided between the motor shaft 25 and the output shaft 26, and the rotational motion of the motor 24 about its own axis X is converted into the swinging motion of the output shaft 26 about its own axis X4 by the eccentric transmission mechanism 30. When the free end of the output shaft 26 is connected with different working heads 29, such as a straight saw blade, a circular saw blade, a triangular sanding disc and the like, the operations of cutting or grinding and the like can be realized.

The eccentric drive mechanism 30 is disposed within the head housing 222 and includes a shift fork 32 and an eccentric assembly 34 connected to the motor shaft 25. The eccentric assembly 34 includes an eccentric shaft 342 connected to the motor shaft 25 and a driving wheel 344 mounted on the eccentric shaft 342. One end of the fork 32 is attached to the top of the output shaft 26 and the other end thereof is engaged with the driving wheel 344 of the eccentric assembly 34. The fork 32 includes a sleeve 322 disposed on the output shaft 26 and a fork 324 extending horizontally from the top of the sleeve 322 and perpendicularly toward the motor shaft 25. In this embodiment, the drive wheel 344 is a ball bearing having a spherical outer surface that engages the fork portion 324 of the yoke 32. Eccentric shaft 342 is eccentrically connected to motor shaft 25, i.e., axis X3 of eccentric shaft 342 is not coincident with axis X2 of motor shaft 25 and is radially offset by a certain distance. The fork portion 324 of the fork 32 abuts against both sides of the driving wheel 344 and is closely in sliding contact with the outer surface of the driving wheel 344.

When the motor 24 drives the motor shaft 25 to rotate, the eccentric shaft 342 is driven by the motor shaft 25 to rotate eccentrically relative to the axis X2 of the motor 24, and further the driving wheel 344 is driven to rotate eccentrically relative to the axis X2 of the motor. Under the drive of the driving wheel 344, the shifting fork 32 swings relative to the axis X4 of the output shaft, and drives the output shaft 26 to swing around the axis X4 of the output shaft, so as to drive the working head 29 mounted on the output shaft to swing to process a workpiece.

Referring to fig. 3, the first supporting mechanism 42, the second supporting mechanism 44 and the vibration damping mechanism 50 are mutually matched and arranged between the outer shell 20 and the inner shell 22 in an overlapping manner, and can be selectively arranged at any desired position between the outer shell 20 and the inner shell 22 to avoid the holding area on the outer shell 22 as much as possible, and the first supporting mechanism 42, the second supporting mechanism 44 and the vibration damping mechanism 50 are preferably symmetrically arranged at two sides of the tool shell and can be arranged between the head shell 222 and the outer shell 20 only; or between the motor housing 224 and the outer housing 20, preferably between the head housing 222 and the outer housing 20, and between the motor housing 224 and the outer housing 20.

The following description will be made in detail by taking only one set of the first support mechanism 42, the second support mechanism 44, and the damping mechanism 50 as an example.

The first support mechanism 42 and the second support mechanism 44 are provided on one of the outer housing 20 and the inner housing 22, respectively, and intermediate the two housings. The first support mechanism 42 and the second support mechanism 44 may be a part extending from the housing or may be a component fixed to the housing. The first support mechanism 42 includes a first support portion 422 and a first position-limiting portion 424, and the second support mechanism 44 includes a corresponding second support portion 442 and a corresponding second position-limiting portion 444. The first support 422 and the second support 442 cooperate to support the second damping member in a direction substantially perpendicular to the longitudinal axis X1 or the motor axis X2; the first stopper portion 424 and the second stopper portion 444 are a pair of a protrusion and a recess adapted to the protrusion, the first stopper portion 424 is one of the protrusion and the recess, and the second stopper portion 444 is the other of the protrusion and the recess. The first limiting portion 424 and the second limiting portion 444 cooperate to limit the movement of the inner housing 22 relative to the outer housing 20 in all directions substantially perpendicular to the direction of the second damping member 54.

In this embodiment, the first supporting mechanism 42 is disposed on the outer surface of the inner housing 22, the second supporting mechanism 44 is disposed on the inner surface of the outer housing 20, the first limiting portion 424 is a protrusion in the shape of a cylindrical pin, and the second limiting portion 444 is a recess for accommodating the first limiting portion 424. The first and

second support mechanisms

42, 44 cooperate such that the air layer present between the inner housing 22 and the outer housing 20 will cause the inner housing 22, which houses the motor 24 and the output shaft 26, to be substantially mechanically decoupled from the outer housing 20, in particular the grip area, reducing the sensation of vibration, thus resulting in an increase in operating comfort, and will also cause a reduction in the amount of heat transferred from the inner housing 22 to the outer housing 20, which also increases the operating comfort for the user.

The vibration damping mechanism 50 mainly includes a first damper member 52 and a second damper member 54. By arranging the damping elements such that the movement transmitted between the first and

second support mechanisms

42, 44 and between the inner and

outer shells

22, 20 is such that: the impact or vibration is significantly attenuated. In which interruptions occur for high-frequency oscillations, such as vibrations, so that vibrations, impacts and heat transfer from the inner housing 22 to the outer housing 20 are further damped, thereby significantly improving the operational safety and the operating comfort of the machine tool itself.

Referring to fig. 4 and 5, in the present embodiment, the second damper member 54 acts in a direction perpendicular to the longitudinal axis X1 or the motor axis X2. The second damping member 54 is circular and includes a through hole 542, the first position-limiting portion 424 passes through the through hole 542 of the second damping member 54 to match with the second position-limiting portion 444, preferably, the size and shape of the through hole 542 should match with the first position-limiting portion 424, and the outer diameter of the second damping member 54 is at least larger than the inner diameter of the second position-limiting portion 444, at this time, the second damping member 54 is outside the second position-limiting portion 444, and the second damping member 54 is supported between the first supporting portion 422 and the second supporting portion 442, so that the second damping member 54 can provide the required prestress in the direction perpendicular to the longitudinal axis X1 or the motor axis X2 in the working state.

Referring to fig. 4 and 5, in the present embodiment, the first damping member 52 is cylindrically received in the second position-limiting portion 444, the outer surface of the first damping member abuts against the inner surface of the second position-limiting portion 444, and the height of the first damping member 52 does not exceed the height of the second position-limiting portion 444; the first damper 52 includes a through hole 522, the first stopper portion 424 passes through the through hole 542 of the second damper 54 and the through hole 522 of the first damper 52 is fitted to the second stopper portion 444, the first damper 52 at least partially overlaps with the second damper 54 in a direction perpendicular to the longitudinal axis X1 or the motor axis X2, and the first damper 52 can function to reduce vibration, impact, and heat transfer in all directions perpendicular to the direction in which the second damper 54 functions.

Referring to fig. 4 and 5, the first damping member 52 further includes a stopping portion 524, and the stopping portion 524 is engaged with a recess (not shown) on the second limiting portion 444 to prevent the first damping member 52 from rotating or sliding out of the second limiting portion 444 during operation; the through hole 522 of the first damping member 52 includes an extension portion 526, the extension portion 526 is a radial extension of a side wall of the through hole 522, the extension portion 526 may be disposed at any position on the side wall of the through hole 522, in this embodiment, the extension portion 526 is close to an open end of the second position-limiting portion 444 and is in a protruding shape facing the first position-limiting portion 424, the extension portion 526 and the first position-limiting portion 424 may directly contact or have a slight gap, and preferably, the extension portion 526 and the first position-limiting portion 424 directly abut against each other. In operation, since only the extension portion 526 of the first damping member 52 contacts the first position-limiting portion 424, when the outer shell 20 and the inner shell 22 move relatively, the contact area is reduced, especially when the inner shell 22 moves relative to the outer shell 20 in the direction perpendicular to the longitudinal axis X1 or the motor axis X2, an air layer exists between the bottom end of the second position-limiting portion 444 and the first position-limiting portion 424, so as to reduce the friction resistance of the relative movement of the inner shell and the outer shell, and the air layer plays a role in reducing vibration, impact and heat transfer.

The shape of the first stopper portion 424 and the second stopper portion 444 is not limited to a circle, and may be a polygon, an ellipse, or the like, or any irregular shape. And the shape of the first stopper portion 424 may be different from the shape of the second stopper portion 444. The shape and size of the first damping member 52 and the through-hole 522 thereof are changed according to the shape of the second stopper portion 444 and the first stopper portion 424. Also, the shape of the second damper 54 is not limited to a circle, but may be a polygon, an ellipse, or the like.

The first damper 52 and the second damper 54 each have a certain elasticity, and use Polyurethane (PU), Ethylene Propylene Diene Monomer (EPDM), polypropylene (EPP), rubber, a mixture thereof, and the like. These materials are used between the inner housing 22 and the outer housing 20, with appropriate pre-stressing to improve the comfort of tool operation. In the present embodiment, both the first damper member 52 and the second damper member 54 are preferably Polyurethane (PU). Of course, different materials may be used for the first damper 52 and the second damper 54. For example, the first damper 52 is made of Polyurethane (PU), and the second damper 54 is made of polypropylene (EPP).

The first damping member 52 and the second damping member 54 are made of Polyurethane (PU) and have a density of 0.3 to 0.8g/cm 3. The second damping member 54 is preferably 0.45 to 0.55g/cm3, and the first damping member 52 is preferably 0.6 to 0.7g/cm 3. Thus, the densities of the first and second damping

members

52, 54 may be the same, but may differ. Preferably, the material density of the second damping member 54 is less than the material density of the first damping member 52.

Referring to fig. 4 and 5, the spacer 56 is a rigid spacer, and the spacer 56 is preferably made of a wear-resistant and heat-resistant non-metallic material, which has a density, surface hardness and wear resistance superior to those of the first damping member 52 and the second damping member 54, such as red vulcanized paper, electrical insulating spacers, nylon spacers, highland barley paper, etc., and if a metallic material is used, the impact of the metallic spacer with the housing will generate noise and increase the cost.

The spacer 56 is located between the first damper 52 and the second damper 54. Preferably, the spacer 56 is the same shape and size as the second damping member 54 and has a negligible thickness relative to the second damping member 54. Spacer 56 includes an opening 562, and opening 562 is not larger than through hole 542 of second damping member 54, i.e., the edge of through hole 542 is always outside the edge of opening 562. The first limiting part 424 penetrates through the through hole 542 of the second damping part 54, then penetrates through the opening 562 of the isolating part 56, and finally penetrates through the through hole 522 of the first damping part 52 to be matched with the second limiting part 444, so that abrasion or breakage of the second damping part 54 caused by local depression generated by extrusion during tool vibration is prevented, the service life of the damping part is prolonged, and the vibration damping effect is ensured. Fig. 5a shows a normal state in which the second damping member 54 is not subjected to a force, and fig. 5b shows a state in which the second damping member 54 is subjected to a force (in the direction of arrow "C") transmitted from the inner housing 22 to the outer housing 20 in an operating state, and in this process, due to the spacer 56, the second damping member 54 is always kept in a flat state, and is not bent, but the thickness is changed.

The isolator 56 may also be shaped and sized differently than the second damper 54, but the projection of the second damper 54 onto a plane perpendicular to the longitudinal axis X1 or the motor axis X2 falls within the projection of the isolator 56 onto that plane. The outer edge of the isolation member 56 cannot be smaller than the outer edge of the second damping member 54, so that the second damping member 54 is completely covered by the isolation member 56, and the isolation member 56 can protect each stress point of the second damping member 54 in a working state.

In this embodiment, the first support mechanism 42, the second support mechanism 44 and the vibration reduction mechanism 50 are disposed between the motor housing 224 and the outer housing 20, and the three structures are regarded as a group of structures, which are basically the same as the two groups of structures disposed between the head housing 222 and the outer housing 20, the connecting lines of the centers of the two groups of damping members at the head housing 222 and the center of the damping member at the motor housing 224 are not located on the same straight line, and the connecting lines of the three centers form a triangle, so that the arrangement can prevent the first support mechanism 42, the second support mechanism 44 and the vibration reduction mechanism 50 from twisting during the working process, and further ensure the stability of the vibration reduction effect. Meanwhile, the first supporting mechanism 42, the second supporting mechanism 44 and the vibration damping mechanism 50 are arranged in an overlapping mode, so that the structural layout of the swing power tool 100 is more compact, and the space is saved. The location and number of the support and vibration reduction structures are not limited to the above, and preferably at least one set of the head housing 222 and the motor housing 224 can be varied according to specific needs, preferably avoiding the grip area on the outer housing 22.

Referring to fig. 6, in order to adapt to a work scene with dark light or to illuminate a work head and a processing material thereof under some working conditions, the tool 100 may be additionally provided with an illumination device 60. The lighting device 60 preferably uses an LED lamp as a light source, and other light sources can be used for lighting. In the case of the swing power tool having the double-housing vibration damping function, in order to reduce the vibration sensation and improve the operation comfort, the inner and outer housings are independent of each other, always maintained in a spaced state, and there is a relative movement, in which case if the lighting device 60 is provided on the inner housing 22, the power supply line 62 of the lighting device 60 is disposed on the outer housing 20, or the lighting device 60 is provided on the outer housing 20, the power supply line 62 is disposed on the outer housing 20, and the power supply line is easily worn or broken due to the high-frequency relative movement of the inner and outer housings. Preferably, the lighting device 60 is fixed to the outer housing 20, the inner surface of the outer housing 20 is provided with a clamping groove 64, the power supply line 62 is arranged in the clamping groove 64 and fixed on the inner surface of the outer housing 20, one end of the power supply line 62 is connected to the PCB 66, and the other end is connected to the lighting device 60. As shown in fig. 6, the lighting device 60 is embedded on the edge of the outer casing 20, and it is also conceivable to provide a receiving space between the inner and outer casings, and the lighting device 60 is disposed in the receiving space and fixed on the inner surface of the outer casing 20, and this arrangement also serves to protect the lighting device 60 and prevent physical damage.

Referring to fig. 7, in another arrangement of the lighting device 60 and the power supply line 62, the lighting device 60 is fixed to a head shell 222 of the inner housing 22, a slot 64 is provided on an outer surface of the inner housing 22, and the power supply line 62 is arranged on the outer surface of the inner housing 22 through the slot 64.

The present invention is not limited to the embodiments described in the foregoing embodiments, and other modifications are possible by those skilled in the art in light of the technical spirit of the present invention, and are intended to be included within the scope of the present invention as long as they perform the same or similar function as the present invention.

Claims

1. A power tool, characterized in that the power tool comprises:

a motor including a motor axis;

the output shaft is driven by the motor, and one end of the output shaft is connected with the working head;

a housing including an inner housing and an outer housing, the inner housing the motor and at least a portion of the output shaft, the outer housing including a longitudinal axis;

a vibration damping mechanism provided between the inner housing and the outer housing, the vibration damping mechanism including at least a first damping member and a second damping member, the second damping member acting in a direction substantially perpendicular to the motor axis or the longitudinal axis, the first damping member being substantially perpendicular to a direction in which the second damping member acts, the first damping member and the second damping member being at least partially overlapped in a direction perpendicular to the motor axis or the longitudinal axis;

an isolator disposed at least partially between the first damping member and the second damping member.

2. The power tool of claim 1, wherein: at least one of the material and the density of the isolating piece is different from that of the first damping piece and the second damping piece, and the isolating piece is made of rigid material.

3. The power tool of claim 1, wherein: the power tool further comprises a first support mechanism and a second support mechanism, wherein the first support mechanism is arranged on one of the inner shell and the outer shell, the second support mechanism is arranged on the other one of the inner shell and the outer shell, and the first support mechanism and the second support mechanism are arranged between the inner shell and the outer shell; the first supporting mechanism comprises a first supporting part and a first limiting part, and the second supporting mechanism comprises a second supporting part and a second limiting part which correspond to each other.

4. The power tool of claim 3, wherein: the first and second support portions support the second damping member in a direction substantially perpendicular to the motor axis or the longitudinal axis; the first limiting part comprises one of a protruding part and a recessed part, the second limiting part comprises the other of the protruding part and the recessed part, and the first limiting part and the second limiting part are matched to limit the inner shell to move relative to the outer shell in a direction approximately perpendicular to the action direction of the second damping part.

5. The power tool of claim 4, wherein: the first damping part is located between the first limiting part and the second limiting part, and the second damping part is located between the first supporting part and the second supporting part.

6. The power tool of claim 5, wherein: the first damping member is housed in the recess portion, the first damping member including a through-hole through which the protrusion portion is fitted with the recess portion.

7. The power tool of claim 6, wherein: the second damping part comprises a through hole, the protruding part penetrates through the through hole and the through hole to be matched with the recessed part, and the second damping part is located between the first supporting part and the second supporting part.

8. The power tool of claim 7, wherein: a projection of the second damping member in a plane perpendicular to the motor axis or the longitudinal axis falls within a projection range of the spacer in the plane.

9. The power tool of any one of claims 1 to 8, wherein: the power tool further comprises an illuminating device, the illuminating device is arranged on one side, close to the working head, of the outer shell or the inner shell, and a power supply line of the illuminating device is arranged on the shell, and is identical to the illuminating device.

10. The power tool of claim 9, wherein: the shell body internal surface or interior casing surface is equipped with the card wire casing, the power supply line sets up in the card wire casing.