WO2016127930A1

WO2016127930A1 - Power tool

Info

Publication number: WO2016127930A1
Application number: PCT/CN2016/073681
Authority: WO
Inventors: 钟红风; 庞晓丽; 吴宇; 徐静涛; 马一纯
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2015-02-15
Filing date: 2016-02-05
Publication date: 2016-08-18

Abstract

Disclosed is a power tool, comprising a shell, a motor (20, 320) received in the shell, and an output shaft (22, 322, 522, 622) driven by the motor (20, 320) and used to mount a working head, wherein the shell comprises a first head shell (591) and a second head shell (595), the first head shell (591) is used to receive part of the output shaft (22, 322, 522, 622), the maximum length of the first head shell (591) in the axial direction of the output shaft (22, 322, 522, 622) is L, the plane for defining the axis of the output shaft (22, 322, 522, 622) is a mid-plane, N vibration damping bodies (58, 258a-d, 358, 558, 658, 858) are arranged between the first head shell (591) and the second head shell (595) and are arranged on at least one side of the mid-plane, each of the vibration damping bodies (58, 258a-d, 358, 558, 658, 858) comprises a vibration damping portion, which is in contact with the first head shell (591) and the second head shell (595), and the sum of the length of N vibration damping portions in the axial direction of the output shaft (22, 322, 522, 622) is greater than or equal to 0.2 L and less than or equal to L. The structure of the power tool enables it to achieve a good vibration damping effect while the working efficiency is not affected.

Description

Power tool

Technical field

The invention relates to a power tool.

Background technique

Power tools, such as oscillating power tools, have an output shaft that rotates around the axis. When different attachment heads are mounted on the output shaft, a variety of different operations can be performed, such as sawing, cutting, grinding, and scraping. Etc. to suit different job needs.

At present, the more common oscillating power tools on the market generally include a housing and a motor housed in the housing. The motor shaft of the motor is connected with an eccentric member, and a bearing is sleeved on the eccentric member to form an eccentric assembly. When the motor shaft rotates, the eccentric assembly can perform an eccentric rotational motion about the axis of the motor shaft. The output shaft of the oscillating power tool is disposed perpendicular to the motor shaft, and a shift fork assembly is fixedly coupled to the output shaft. The fork assembly is formed with two opposite extension arms to surround the eccentric assembly, and the inner sides of the two extension arms are Close contact with the bearing in the eccentric assembly, so that when the eccentric bearing rotates eccentrically, the eccentric transmission assembly will drive the shift fork to generate a horizontal oscillating motion, and the fixed output of the shift fork and the output shaft will surround the output shaft around the shaft. The heart line makes a rotary swing. In this way, 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, etc., the swinging power tool can realize various operations.

However, the oscillating power tool inevitably generates a large vibration during the work. The motor is placed directly on the housing and the operator is often directly gripped on the housing during operation so that vibration is transmitted from the tool to the operator. This affects the operational comfort of the oscillating power tool.

Therefore, it is necessary to develop a new power tool to solve the above problems.

Summary of the invention

An object of the present invention is to provide a power tool which can effectively reduce the vibration of the grip portion and improve the comfort of the operation.

In order to solve the above problems, the technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, the housing including the a first head case for accommodating a portion of the output shaft, a first head case having a maximum length L along an axial direction of the output shaft, defining the output shaft a plane in which the axis is located is an intermediate plane, and N dampers are disposed between the first head shell and the second head shell and on at least one side of the intermediate plane, each damper body including Reduction of contact between the first head shell and the second head shell The oscillating portion, the sum of the lengths of the N damper portions along the axial direction of the output shaft is greater than or equal to 0.2 L and less than or equal to L.

Preferably, the sum of the lengths of the N damping portions along the axial direction of the output shaft is greater than or equal to 0.4 L and less than or equal to 0.7 L.

Preferably, two damper bodies are disposed between the first head shell and the second head shell and on at least one side of the intermediate plane, and two of the two damper bodies respectively abut The longitudinal extension directions Z1 and Z2 of the abutment are disposed at an angle.

Preferably, the housing further includes a first motor housing fixedly coupled to the first head housing, and a second motor housing fixedly coupled to the second head housing, the first motor housing for mounting the a motor, a motor casing damping device is disposed between the first motor casing and the second motor casing.

Preferably, on one side of the intermediate plane, the motor casing damping device and the N damping bodies form at least one triangle, and the N damping portions constitute one side of the triangle.

Preferably, one side of the triangle includes two damper bodies disposed at intervals.

Preferably, one side of the triangle includes a longitudinally extending strip-shaped damper.

Preferably, the axis passing through the output shaft and the axis of the motor are defined as a center plane, and the plane of the triangle is disposed parallel or at an angle to the center plane.

Preferably, the first head shell has a first side facing away from the second head shell, the first side is provided with a support member, and the second head shell is provided with a connecting unit, the connecting unit There is an abutment facing the first side, and the N damping bodies are disposed between the support and the abutment.

Preferably, the second head shell has a first side facing away from the first head shell, the first side is provided with a support member, and the first head shell is provided with a connecting unit, the connecting unit There is an abutment facing the first side, and the N damping bodies are disposed between the support and the abutment.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, the housing a first head shell for accommodating a portion of the output shaft, a plane defining an axis of the output shaft as a median plane, the first head shell and the first N dampers are disposed between the two head shells on at least one side of the intermediate plane, and each damper body includes a damper portion that is in contact with the first head shell and the second head shell. The distance between the two most damped portions of the N damper portions in the axial direction along the output shaft is greater than the distance between the two farthest points in the radial direction of the output shaft.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, The housing includes a first head shell for accommodating a portion of the output shaft, and a second head shell for defining a maximum length L of the first head shell along an axial direction of the output shaft, a plane in which the axis of the output shaft is located is an intermediate plane, and N dampers are disposed between the first head shell and the second head shell and on at least one side of the intermediate plane, each damper body a vibration damping portion including the first head shell and the second head shell, wherein the distance between the two farthest points in the axial direction of the output shaft is greater than Equal to 0.2L, less than or equal to L.

Compared with the prior art, the N power absorbing body is provided in the power tool of the present invention, which can effectively prevent the vibration generated by the movement of the output shaft from being transmitted to the grip portion provided on the outer casing body, thereby reducing the vibration of the grip portion. Greatly improve the user's vibration problems during use, improve the comfort of the operation, and will not affect the work efficiency.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, and an output shaft driven by the motor for mounting a working head, the housing a first housing, a second housing spaced apart from the first housing, the first housing having a first side facing away from the second housing, the first side being disposed There is a support member, and the second housing is provided with a connecting unit, the connecting unit has an abutting member facing the first side, and a vibration reducing body is disposed between the supporting member and the abutting member.

Preferably, the first housing includes a motor housing for mounting the motor and/or a head housing for partially housing the output shaft, and the second housing is disposed outside the first housing.

Preferably, the second housing includes a motor housing for mounting the motor and/or a head housing for partially housing the output shaft, the first housing being disposed outside the second housing.

Preferably, the connecting unit includes a connecting member connected to the second housing, the abutting member is connected to the connecting member, and the extending direction of the abutting member is in the same direction as the extending direction of the connecting member Or set at an angle.

Preferably, the axis passing through the axis of the output shaft and the axis of the motor is defined as a center plane, and the extending direction of the connecting member is perpendicular or parallel to the center plane.

Preferably, the extending direction of the abutting member is perpendicular to the extending direction of the connecting member.

Preferably, the connecting unit comprises at least two connecting members arranged at a distance, and an abutting member connecting the at least two connecting members.

Preferably, the first housing is provided with a through hole, and the connecting unit passes through the through hole to position the abutting member on the first side.

Preferably, the abutting member is provided with an abutting surface, and the supporting member is provided with a contact surface, and the vibration damping The body abuts the abutting surface and the contact surface.

Preferably, one of the contact surface and the abutting surface is a convex surface, and the other of the contact surface and the abutting surface is a concave surface.

Preferably, the contact surface is a concave surface, and the support member is provided with two contact surfaces disposed away from each other.

Preferably, the abutting surface is a convex surface, and the abutting member is provided with two abutting surfaces disposed away from each other.

Preferably, an eccentric transmission mechanism is disposed between the motor and the output shaft, the output shaft is oscillated about an axis of the output shaft under motor driving, and the working head swings with the output shaft to form an oscillating plane, The main force direction of the damper body is parallel to the oscillating plane and perpendicular to the axis of the motor.

Preferably, the damper body maintains a predetermined minimum spacing between the first housing and the second housing.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, and an output shaft driven by the motor for mounting a working head, the housing a first housing, a second housing spaced apart from the first housing, the first housing having a first side facing away from the second housing, the first side being disposed There is a support member, and the second housing is provided with a connecting unit, the connecting unit extends to the first side, and a vibration damping body is disposed between the connecting unit and the support member.

Preferably, the first housing is provided with a through hole, and the connecting unit extends through the through hole to the first side.

Preferably, the first housing has an end surface, and the connecting unit extends around the end surface to the first side.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, and an output shaft driven by the motor for mounting the working head, wherein: The housing includes a first housing and a second housing that are disposed at an intersection, and a vibration damping body is disposed between the first housing and the second housing.

Preferably, the first housing is provided with a connecting unit, and the second housing is provided with a through hole, and the connecting unit extends through the through hole to the second housing to face the first One side of a housing, the damper body is disposed between the connecting unit and the second housing.

Compared with the prior art, the power tool of the present invention is provided with a vibration damping body, which can effectively prevent the vibration generated by the movement of the output shaft from being transmitted to the grip portion provided on the outer casing body, thereby reducing the vibration of the grip portion. Greatly improve the user's vibration during use, and improve the comfort of the operation.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, the housing a first head shell for accommodating a portion of the output shaft, a plane defining an axis of the output shaft as a median plane, the first head shell and the first At least two damper bodies are disposed between the two head shells on at least one side of the intermediate plane.

Preferably, the center point of the at least two damper bodies is a straight line segment, and the straight line segment is parallel or at an angle to the axis of the output shaft.

Preferably, the maximum length of the first head shell in the direction of the output shaft is L, and each of the at least two vibration damping bodies comprises the first head shell and the second head shell The damper portion of the contact, the sum of the lengths of the at least two damper portions along the axial direction of the output shaft is greater than or equal to 0.2L, and less than or equal to L.

Preferably, the sum of the lengths of the at least two damper portions along the axial direction of the output shaft is greater than or equal to 0.4 L and less than or equal to 0.6 L.

Preferably, each of the at least two damper bodies includes a damper portion in contact with the first head shell and the second head shell, the at least two damper portions being along The distance between the two furthest points in the axial direction of the output shaft is greater than the distance between the two farthest points in the radial direction of the output shaft.

Preferably, on one side of the intermediate plane, the at least two damper bodies and the motor casing damper constitute at least one triangle, and the at least two damper bodies form one side of the triangle.

Preferably, the first head shell has a first side facing away from the second head shell, the first side is provided with a support member, and the second head shell is provided with a connecting unit, the connecting unit There is an abutment facing the first side, the at least two damping bodies being disposed between the support and the abutment.

Preferably, the second head shell has a first side facing away from the first head shell, the first side is provided with a support member, and the first head shell is provided with a connecting unit, the connecting unit There is an abutment facing the first side, the at least two damping bodies being disposed between the support and the abutment.

Compared with the prior art, at least two damper bodies are disposed in the power tool of the present invention, which can effectively prevent the vibration generated by the movement of the output shaft from being transmitted to the grip portion provided on the outer casing, thereby reducing the grip portion. Vibration, greatly improve the user's vibration problems during use, improve the comfort of operation.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, the housing a maximum length L along the axial direction of the output shaft, the housing comprising a first motor housing and a second motor housing, the first motor housing for mounting the motor, defining an axis of the output shaft The plane is an intermediate plane, and at least one side of the intermediate plane is provided with N dampers between the first motor casing and the second motor casing, and each damper body includes the first motor casing a damper portion that is in contact with the second motor casing, wherein a sum of lengths of the N damper portions along an axial direction of the output shaft is 0.2 L or more and L or less.

Preferably, an axial distance between the damper body closest to the output shaft and the output shaft of the N damper bodies is greater than or equal to 110 mm.

In order to solve the above problems, another technical solution of the present invention is: a power tool comprising a housing, a motor housed in the housing, an output shaft driven by the motor and used for mounting a working head, wherein: The housing has an axial maximum length L along the output shaft, the housing further comprising a first motor housing and a second motor housing, the first motor housing for mounting the motor, defining an output shaft axis The plane located therein is an intermediate plane, and at least one side of the intermediate plane between the first motor casing and the second motor casing is provided with N damping bodies, each of which includes a damper portion in contact with the first motor case and the second motor case, wherein a distance between the two farthest points of the N damper portions in an axial direction of the output shaft is greater than or equal to 0.2 L, less than or equal to L.

Compared with the prior art, the power tool of the present invention is provided with a vibration damping body, which can effectively prevent the vibration generated by the movement of the output shaft from being transmitted to the grip portion provided on the outer casing body, thereby reducing the vibration of the grip portion, and greatly Improve the user's vibration problems during use, improve the comfort of the operation, and not reduce the work efficiency.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, the housing Also included is a first motor housing for mounting the motor, a plane defining an output shaft axis therein, an intermediate plane, the first motor housing and the second motor At least two damper bodies are disposed between the shells on at least one side of the intermediate plane.

Preferably, the center point of the at least two damper bodies is a straight line segment, and the straight line segment is The axes of the output shafts are arranged parallel or at an angle.

In order to solve the above problems, another technical solution of the present invention is: a swinging power tool including a housing, a motor housed in the housing, an output shaft for mounting the working head, and the motor and the An eccentric transmission mechanism between the output shafts, the eccentric transmission mechanism converting the rotational motion of the motor into an oscillating motion of the output shaft about its own axis, the swing angle of the output shaft being greater than or equal to 4°, the housing The first housing and the second housing are provided with a gap therebetween, and a vibration damping device is disposed between the first housing and the second housing.

In order to solve the above problems, another technical solution of the present invention is: a power tool including a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, the housing a first housing and a second housing including gaps, wherein a plane defining an axis of the output shaft is an intermediate plane, between the first housing and the second housing and in the middle N dampers are disposed on at least one side of the plane, the N dampers are arranged along the axial direction of the output shaft and each damper includes the first casing and the second casing The damper portion that is in contact with the body, the sum of the lengths of the N damper portions along the axial direction of the output shaft is 15 mm or more.

Preferably, the sum of the lengths of the N damping portions along the axial direction of the output shaft is greater than or equal to 20 mm.

In order to solve the above problems, another technical solution of the present invention is: a power tool comprising a housing, a motor housed in the housing, an output shaft driven by the motor and used for mounting a working head, wherein The housing includes a first housing and a second housing spaced apart from each other, and a plane defining an axis of the output shaft is an intermediate plane, between the first housing and the second housing And providing N dampers on at least one side of the intermediate plane, each damper comprising a damper portion in contact with the one casing and the second casing, the N dampers The distance between the two farthest points in the axial direction of the output shaft is greater than or equal to 15 mm.

Compared with the prior art, the power tool in the utility model is provided with a vibration damping body, which can effectively avoid The vibration generated by the movement of the output-free shaft is transmitted to the grip portion provided on the outer casing, which reduces the vibration of the grip portion, greatly improves the vibration problem of the user during use, improves the comfort of the operation, and does not decrease productivity.

DRAWINGS

The invention will now be further described with reference to the accompanying drawings and embodiments.

1 is a perspective view of a power tool according to a first embodiment of the present invention;

Figure 2 is a longitudinal sectional view of the power tool shown in Figure 1;

Figure 3 is a perspective view of the transmission mechanism of the power tool shown in Figure 2;

Figure 4 is a cross-sectional view of the power tool shown in Figure 2 taken along the line A-A;

Figure 5 is a cross-sectional view of the power tool shown in Figure 2 taken along the line B-B;

Figure 6 is an exploded perspective view showing a part of the structure of the rear side damper body of the power tool motor case shown in Figure 2;

Figure 7 is a simplified schematic view of a power tool according to a second embodiment of the present invention;

FIG. 8 is a simplified schematic diagram of a vibration damping structure of a power tool according to a third embodiment of the present invention.

Figure 9 is a front elevational view of a power tool according to a fourth embodiment of the present invention;

Figure 10 is a longitudinal sectional view of the power tool shown in Figure 9, in which the power tool is not equipped with a working head;

Figure 11 is a cross-sectional view of the power tool shown in Figure 9 taken along the C-C direction;

Figure 12 is an exploded perspective view showing a partial structure of the power tool shown in Figure 9;

Figure 13 is a plan view of the power tool shown in Figure 9;

Figure 14 is a cross-sectional view of the power tool shown in Figure 13 taken along the line D-D;

Figure 15 is an exploded perspective view showing the mounting structure of the power absorber tail damper body shown in Figure 13;

16 is a simplified schematic diagram of a vibration damping structure of a power tool according to a fifth embodiment of the present invention;

Figure 17 is a front elevational view of a power tool according to a sixth embodiment of the present invention;

Figure 18 is a cross-sectional view of the power tool shown in Figure 17 taken along the line E-E;

19 and FIG. 20 are simplified schematic diagrams of the vibration damping principle analysis of the power tool shown in FIG. 17;

21 is a cross-sectional view showing a vibration damping structure of a power tool according to a seventh embodiment of the present invention;

Figure 22 is a simplified schematic view of a vibration damping structure of a power tool according to an eighth embodiment of the present invention.

Specific embodiment

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

[First Embodiment]

1 to 6 show a swing power tool 100 according to a first embodiment of the present invention.

Referring to FIGS. 1 and 2, the oscillating power tool 100 of the present embodiment includes a housing, a motor 20, an output shaft 22 driven by a motor 20 for mounting a working head (not shown), and a fixing member 24 and an output shaft 22. The free end fit secures the working head to the output shaft 22.

In the present embodiment, the motor 20 has a motor shaft 26 whose axis X is substantially perpendicular to the axis Y of the output shaft 22. Preferably, the axis X of the motor shaft 26 is coplanar with the axis Y of the output shaft 22 to form a center plane XY. It will be appreciated by those skilled in the art that the axis X of the motor shaft 26 and the axis Y of the output shaft 22 may also be non-coplanar, or coplanar but not perpendicular, such as the axis X of the motor shaft 26 being parallel or in line with the axis Y of the output shaft 22. Other angles are available.

An eccentric transmission mechanism 28 is disposed between the motor 20 and the output shaft 22, through the eccentric transmission mechanism 28,

The rotational motion of the motor shaft 26 is converted into a rotational reciprocating oscillating motion of the output shaft 22 about its own axis Y, as indicated by arrows R-R in FIGS. 1 and 2. When the free end of the output shaft 22 is connected to a different working head attachment, such as a straight saw blade, a circular saw blade, a triangular sanding disc, etc., cutting or grinding operations can be realized.

The working head swings with the output shaft 22 to form a swinging plane. The oscillating plane can be thought of as a plane formed by any one of the straight lines perpendicular to the output shaft 22 on the working head that oscillates with the output shaft 22. The oscillating plane is perpendicular to the central plane XY and perpendicular to the axis Y of the output shaft 22. At the position where the oscillating power tool shown in Fig. 2 is located, the center plane XY is the plane of the paper of Fig. 2, and the oscillating plane is perpendicular to the plane of the paper and perpendicular to the axis Y of the output shaft 22.

2 and 3, the eccentric transmission mechanism 28 includes a shift fork 30 and an eccentric assembly 32 coupled to the motor shaft 26. The shift fork 30 includes a sleeve 38 sleeved on the output shaft 22 and a fork 40 extending from the top end of the sleeve 38 toward the motor shaft 26. The eccentric assembly 32 includes an eccentric shaft 34 coupled to the motor shaft 26 and a bearing 36 mounted on the eccentric shaft 34. The fork portion 40 of the shift fork 30 cooperates with the bearing 36, i.e., the fork portion 40 of the shift fork 30 is covered. On both sides of the bearing 36, and in close sliding contact with the outer surface of the bearing 36. In the present embodiment, the bearing 36 is a ball bearing having a spherical outer surface that mates with the fork 40 of the shift fork 30. The eccentric shaft 34 is eccentrically coupled to the motor shaft 26, i.e., the axis X' of the eccentric shaft 34 does not coincide with the axis X of the motor shaft 26, and is radially offset by a certain distance. Of course, here, the bearing 36 in the eccentric assembly 32 can also be provided as an eccentric bearing, so that the eccentric shaft 34 can be disposed coaxially with the motor shaft 26, although different shafts are also possible.

When the motor 20 drives the motor shaft 26 to rotate, the eccentric shaft 34 is eccentrically rotated with respect to the axis X of the motor shaft 26 by the motor shaft 26, thereby driving the bearing 36 to be eccentric with respect to the axis X of the motor shaft 26. Rotate. Under the driving of the bearing 36, the shift fork 30 rotates back and forth with respect to the axis Y of the output shaft 22 to further oscillate the output shaft 22 to reciprocate and swing about its own axis Y. The output shaft 22 is rotated and reciprocated to drive the working head mounted thereon to rotate and reciprocate to process the workpiece.

In the present embodiment, the swing angle of the output shaft 22 is 5°. The output shaft 22 has a swing frequency of 18,000 times per minute. By setting the swing angle of the output shaft to 5°, the working efficiency of the working head is greatly improved, and when the working head is a saw blade, the discharge of debris is facilitated.

It should be noted that, in the swing power tool of the present invention, the swing angle of the output shaft 22 is not limited to 5°, and may be set to any value of 4° or more, for example, 4.1°, 4.3°, 4.5°, 4.7°, One of 5°, 5.2°, 5.5°, 5.7°, 6°, 6.3°, 6.5°, 6.8°, 7°, 7.2°, 7.5°, 7.7°, 8°, 9° or 10°, also Can be greater than 10°. The swing frequency of the output shaft 22 is also not limited to 18,000 times per minute, and is preferably greater than 10,000 times per minute.

Please refer to the experimental data in the table below, which shows the improvement of the efficiency of the oscillating power tool at large swing angles. As can be seen from the table below, when the swing angle of the output shaft is 6°, when cutting the same size of white or medium density board with a precision saw blade, the efficiency is increased by 0.7 or more when the swing angle is 3°; When using a standard saw blade to cut a medium density board, the efficiency can be increased by 50% compared to a swing angle of 3°. In addition, the efficiency can be increased by 48% when cutting a nail with a double-broken saw blade.

There are many ways to increase the swing angle of the output shaft 22, for example, the outer ring diameter of the bearing 36 can be increased, and the distance between the two extension arms of the fork portion 40 of the shift fork 30 needs to be increased. It is also possible to increase the axial spacing between the eccentric shaft 34 and the motor shaft 26 without changing the size of the bearing 36. It is also possible to reduce the spacing between the axis Y of the output shaft 22 and the bearing 36, although the horizontal dimension of the fork 40 of the shift fork 30 is of course shortened. The above methods can also be used together to obtain a larger swing angle.

Compared with the prior art, the present embodiment overcomes the technical bias that the swinging angle of the swinging power tool is set to 4° or less, by setting a large swing angle of 4° or more, and simultaneously adopting a swing frequency of more than 10,000 times per minute. , greatly improving the working efficiency of the oscillating power tool and solving the long-term The technical problems that have been eager to solve.

However, as the swing angle becomes larger, a large vibration is inevitably generated, and this vibration is transmitted to the operator through the grip portion on the casing. Moreover, since it is an oscillating motion about the axis Y of the output shaft 22, the vibration is greatest in the direction perpendicular to the center plane XY, and the vibration brings a lot of hidden danger to the operator, and it is necessary to reduce the vibration of the grip portion. .

Please refer to FIG. 2 and FIG. 4 to improve the comfort of the operation for reducing the vibration of the grip on the housing. In the present embodiment, the housing includes a first housing 42 and a second housing 44 that are spaced apart from each other. In the present embodiment, the second housing 44 is disposed outside the first housing 42. Of course, the inventive concept of the present invention can also be achieved by arranging the first housing outside the second housing.

The first housing 42 is referred to as an inner housing and the second housing 44 is referred to as an outer housing. There is a gap between the first housing 42 and the second housing 44 to prevent vibration from being transmitted directly from the first housing 42 to the second housing 44. Preferably, the gap between the first housing 42 and the second housing 44 is greater than or equal to 0.5 mm and less than or equal to 4 mm. More preferably, the gap between the first housing 42 and the second housing 44 is greater than or equal to 0.5 mm and less than or equal to 2 mm. Not only can it reduce vibration but also reduce the volume of the entire swing power tool and improve the grip comfort.

The first housing 42 includes a motor housing 46 for mounting the motor 20 and a head housing 48 for receiving a portion of the output shaft 22. The second housing 44 is provided with a grip portion 50.

Motor housing 46 is used to mount motor 20, which may be designed to partially or completely enclose motor 20, as desired.

The head housing 48 receives a portion of the output shaft 22, and the free end of the output shaft 22 extends out of the head housing 48 to facilitate mating with the mounting member 24 to better grip the working head from the surface.

The second housing 44 is provided with a grip portion 50. In the present embodiment, the grip portion 50 includes at least a portion of the outer contour of the second housing 44 facing away from the motor 20, and the operator holds the outer portion of the second housing 44. The oscillating power tool 100 is operated in a contoured manner, and the grip is convenient and reliable. It will be appreciated by those skilled in the art that an additional grip handle can be mounted on the second housing 44.

By providing a double-layered housing, the vibration of the motor 20 and the output shaft 22 is transmitted through the first housing 42 to the second housing 44 located outside the first housing 42 through the barrier of the first housing 42 to attenuate the vibration. The vibration transmitted to the grip portion 50 on the second housing 44 can be reduced.

As described above, the working efficiency of the oscillating power tool can be improved by increasing the swing angle of the output shaft, but the vibration of the oscillating power tool is inevitably increased while the work efficiency is improved. The oscillating power tool of the embodiment increases the working angle by increasing the swing angle of the output shaft, and is provided with double-shell damping. The solution reduces the vibration, thereby improving the working efficiency while taking into consideration the operational comfort, making the operation of the swinging power tool easier and more comfortable.

To further reduce vibration, a vibration damping device is provided between the first housing 42 and the second housing 44. Specifically, the first housing 42 has a first side facing away from the second housing 44, the first side is provided with a support member 66, and the second housing 44 is provided with a connecting unit having a first side facing A damper device is disposed between the abutting member and the abutting member, and the damper device includes a damper body.

The first housing 42 includes a head case 48 that houses a portion of the output shaft 22 and a motor case 46 that mounts the motor 20. In the present embodiment, a vibration damping device is disposed between the head case 48 and the second case 44, and between the motor case 46 and the second case 44. It will be appreciated by those skilled in the art that a damper device is provided only between the head housing 48 and the second housing 44; or only a damper device is provided between the motor housing 46 and the second housing 44.

Referring to FIG. 4, a vibration damping device is disposed between the head case 48 and the second housing 44.

The head case 48 includes an outer contour 67, an inner contour 65, and an inner receiving space 60 in the region of the second housing 44, wherein the inner receiving space 60 and the outer contour 67 communicate through the through holes 64. The first side facing away from the second housing 44 includes an inner contour 65 and an inner receiving space 60. That is, the support member 66 may be disposed on or formed on the inner contour 65 or may be disposed in the inner accommodating space 60. In the present embodiment, the support member 66 is disposed within the inner receiving space 60.

The second housing 44 is provided with a connecting unit which extends into the first side, that is, the connecting unit projects into the inner receiving space 60, and the damping device is disposed between the connecting unit and the supporting member.

The connecting unit includes an abutment member 53 facing the first side, and the damper device is disposed between the abutting member 53 and the support member 66. Here, the abutting member 53 faces the first side, meaning that the abutting member 53 is located inside the inner receiving space 60. The abutting member 53 is provided with an abutting surface 54 which is located in the inner receiving space 60. The support member 66 is provided with a contact surface 56 opposite to the abutment surface 54. The vibration damping device includes a vibration damping body 58 disposed between the abutment surface 54 and the contact surface 56.

The connecting unit further includes a connecting member 52 connected to the second housing 44, and the abutting member 53 is fixedly coupled to the connecting member 52. The connecting member 52 extends through the through hole 64 to the first side such that the abutting surface 54 is located in the inner receiving space 60. Of course, the connecting member 52 and the abutting member 53 may also be integrally formed. The damper body 58 is elastically deformable to resist internal friction due to damping, thereby reducing vibration transmitted from the first housing 42 to the second housing 44, in other words, the damper body 58 is a force transmitting member.

Specifically, the first housing 42 has a certain thickness and has an inner contour 65 and an outer contour 67, that is, the inner contour 65 and the outer contour 67 are disposed at a distance, and preferably the first housing 42 has a constant thickness. The inner contour 65 is away from the second housing 44 with respect to the outer contour 67, and the inner contour 65 of the first housing 42 is away from the outer contour 67 One side has an inner receiving space 60, and the second housing 44 is located on a side of the outer contour 67 of the first housing that is away from the inner contour 65. The through hole 64 extends through the inner contour 65 and the outer contour 67, and the connecting unit extends through the through hole 64 into the inner receiving space 60.

A damping body 58 is disposed between the abutting surface 54 of the connecting unit and the contact surface 56 in the inner receiving space 60 of the first housing 42 , and the connecting unit is disposed on the second housing 44 , which is equivalent to the second housing A vibration damping body 58 is disposed between the first housing 42 and the first housing 42 to significantly reduce the vibration transmitted by the first housing 42 to the second housing 44, thereby greatly improving the operational comfort.

Moreover, since the abutting surface 54 and the contact surface 56 are both located in the inner housing space 60 of the first housing 42, the vibration damping body 58 between the abutting surface 54 and the contact surface 56 is also disposed in the first housing 42. In the inner accommodating space 60, the remaining space in the first casing 42 can be fully utilized without increasing the volume of the entire oscillating power tool 100, and the small-sized oscillating power tool 100 can also improve the operator's grip comfort. .

In this embodiment, the connecting member 52 of the connecting unit is integrally formed with the abutting member 53 and has an elongated rod shape. One end of the connecting member 52 is connected to the second housing 44, and one end of the abutting member 53 is abutting surface. 54. That is, the connecting member 52 of the connecting unit and the abutting member 53 extend in the same direction. For the vibration damping effect, the extending direction of the connecting member 52 is perpendicular to the center plane XY. Of course, the extending direction of the abutting member 53 and the extending direction of the connecting member 52 may also be set at an angle such as 90 degrees or other angles. There is a gap between the connecting unit and the through hole 64, and the connecting unit extends through the through hole 64 into the inner receiving space 60 of the head case 48.

In this embodiment, the number of connecting units is two, and the two connecting units are symmetrically disposed with respect to the axis Y of the output shaft 22. Preferably, the plane defining the axis Y of the output shaft 22 is an intermediate plane, and the two connecting units are symmetrically disposed with respect to the intermediate plane. Preferably, the median plane is arranged parallel to the axis X of the motor shaft 26. More preferably, the two connecting units are symmetrically arranged with respect to the central plane XY defined by the axis X of the motor shaft 26 and the axis Y of the output shaft 22.

The connection of the connecting member 52 of the connecting unit to the second housing 44 may be that the connecting member 52 is integrally formed on the second housing 44; or the connecting member 52 may be mounted on the second housing 44. The mounting method can be varied, either screw or interference fit, or other mounting methods such as soldering. In the technical solution, the second housing 44 is made of plastic, the connecting member 52 is integrally formed with the second housing 44, and the connecting member 52 is also made of plastic. Those skilled in the art will appreciate that the connector 52 may be made of a metal material such as an aluminum alloy in addition to plastic to improve strength and service life.

When the connecting unit is connected to the second housing 44, the connecting unit can be regarded as a part of the second housing 44, and a part of the connecting unit protrudes into the inner receiving space of the first housing 42, which is equivalent to the second A portion of the housing 44 extends into the inner receiving space of the first housing 42, the second housing 44 and the first housing 42 intersect, and the damping body 58 is disposed at the intersecting first housing 42 and the second housing Between 44. That is to say, in the technical solution, the “between the first housing and the second housing” does not require a specific covering relationship between the first housing and the second housing (for example, the first housing is completely covered) Inside the second housing), the first portion (or the first portion) is provided as long as the first housing (or the first member) and the second portion (or the second member) are respectively disposed on the first housing and the second housing Between the component and the second component (or the second component) can be referred to as between the first housing and the second housing.

In the technical solution, the inner contour 65 of the head shell 48 is provided with a support member 66, and the contact surface 56 is disposed on the support member 66. Preferably, the contact surface 56 is integrally formed on the support member 66, and the contact surface 56 is the surface of the support member 66. The support member 66 is mounted on the head case 48 by screws and housed in the inner accommodating space 60 covered by the outline 65 of the head case 48. The contact surface 56 is disposed on the support member 66, and the structural design is simple. It will be appreciated by those skilled in the art that designing a suitably shaped inner contour 65 and directly using a portion of the inner contour 65 itself as the contact surface 56 may also be used.

Preferably, the contact surface 56 is disposed in the inner receiving space 60 between the output shaft 22 and the motor shaft 26 in the head casing 48. In this embodiment, the inner receiving space 60 between the output shaft 22 and the motor shaft 26 is located in the head casing 48. It is conceivable to those skilled in the art that the inner receiving space 60 between the output shaft 22 and the motor shaft 26 is located in the motor casing 46. Also available.

Since the axis Y of the output shaft 22 and the axis X of the motor shaft 26 of the motor 20 are vertically disposed in the present technical solution, the shift fork 30 of the eccentric transmission mechanism 28 connects the motor shaft 26 and the output shaft 22, and the volume occupied by the shift fork 30 is relatively large. Therefore, the support member 66 and the contact surface 56 are disposed in the inner accommodating space 60 between the motor shaft 26 and the output shaft 22, and the space between the motor 20 and the output shaft 22 can be fully utilized without increasing the oscillating power tool. The volume of 100.

In the present solution, the fork portion 40 of the shift fork 30 is disposed substantially parallel to the motor shaft 26 and the sleeve 38 of the shift fork 30 is coupled to the top end of the output shaft 22 away from the free end. Therefore, preferably, the support member 66 and the contact surface 56 are provided. It is disposed on the side of the fork 30 near the free end of the output shaft 22. The space below the shifting fork 30 can be fully utilized, and the structural layout is reasonable.

A damper body 58 is provided between the abutting surface 54 and the contact surface 56. Specifically, the damper body 58 has a concave shape, and the abutting surface 54 matches the shape of the inner concave portion of the damper body 58. One of the abutting surface 54 and the contact surface 56 is a convex surface, and the other of the abutting surface 54 and the contact surface 56 is a concave surface. In the present embodiment, the abutting surface 54 is a convex surface, and the contact surface 56 is a concave surface.

The abutting surface 54 is matched with the shape of the inner concave portion of the damper body 58, and is disposed such that the damper body 58 is not only The end surface of the abutting member 53 is in contact with the outer surface of the abutting member 53 extending from the end surface thereof in the direction toward the connecting member 52. The abutting surface 54 includes an end surface of the abutting member 53 and a portion of the outer surface connected to the end surface. Not only the vibration in the axial direction of the abutting member 53 but also the vibration in the circumferential direction of the abutting member 53 can be reduced. In the technical solution, the end of the abutting surface 54 of the abutting member 53 is a curved surface, and those skilled in the art may think that a shape such as a plane or a spherical surface may be used in addition to the curved surface.

Preferably, the contact surface 56 is concave, and the damping body 58 is shaped to match the contact surface 56 and at least the receiving portion is within the contact surface 56. The recessed damper body 58 is housed in the recessed contact surface 56. In this way, not only the vibration of the contact surface 56 in the axial direction but also the vibration of the contact surface 56 in the circumferential direction can be reduced. It will be appreciated by those skilled in the art that the contact surface 56 and the damper body 58 are mated in other shapes, such as a planar abutment.

In this embodiment, the number of the connecting units is two, and the number of the supporting members 66 may be one. The supporting member 66 is provided with two contact faces 56, and the openings of the two contact faces 56 are opposite to each other. Specifically, the cross-section of the support member 66 in a plane parallel to the output shaft 22 and perpendicular to the motor shaft 26 is generally "X" shaped, and the two recessed portions of the support member 66 form a contact surface 56.

Preferably, the two contact faces 56 are arranged symmetrically with respect to the axis Y of the output shaft 22. Preferably, the two contact faces 56 are symmetrically disposed with respect to the central plane XY defined by the axis Y of the output shaft 22 and the axis X of the motor shaft 26 such that the two damper bodies 58 are symmetrically disposed with respect to the central plane XY, and the structural layout is reasonable.

The vibration damping body 58 is made of an elastic material such as a part made of a material such as polyurethane (PU), rubber, or elastic metal, or a part made of a combination of these materials, or a combination of parts made of different single materials. .

The damping body 58 is disposed in the inner receiving space 60 of the head case 48. Accordingly, the portion of the second housing 44 where the connecting unit is disposed is located outside the head case 48 of the first housing 42 if the first housing 42 is to be The head case 48 is regarded as the first head case, and the portion in which the second case 44 is provided with the connection unit can be regarded as the second head case. The damper body 58 can reduce the vibration transmitted by the first head shell to the second head shell. Providing a vibration damping device between the head case 45 and the second housing 44 may be referred to as a head case vibration damping device.

The plane in which the axis Y of the output shaft 22 is located is an intermediate plane, and a head shell damping device is disposed on each side of the intermediate plane. Preferably, the median plane is arranged parallel to the axis X of the motor shaft 26. More preferably, the two head shell damper devices are symmetrically disposed with respect to a central plane defined by the axis X of the motor shaft 26 and the axis Y of the output shaft 22. It will be appreciated by those skilled in the art that the headgear damping device can also be provided on either side of the intermediate plane.

The Applicant has found that although the damping body can reduce vibration, it is not as vibration-proof as conventionally assumed. The greater the number of bodies, the better the damping effect. When the number of damping bodies exceeds a certain value, the damping effect decreases. Preferably, the number of the vibration damping bodies on one side of the intermediate plane is 2 to 5. When two to five damper bodies are provided on one side of the intermediate plane, the two to five damper bodies can be referred to as a head shell damper device. Of course, preferably, two to five damping bodies are disposed on both sides of the intermediate plane, and most preferably, the number of the damping bodies disposed on both sides of the intermediate plane is the same and symmetrically disposed. Any technical solutions that are the same as or similar to the technical solutions are to be covered by the scope of the present invention.

2, 5 and 6 show in combination with the provision of a damping device between the motor housing 46 and the second housing 44.

There are many similarities with the head housing 48 and the second housing 44, such as the abutment surface 54, the damping body 58, the shape of the contact surface 56, the material, and the like. I won't go into details here.

The difference is: the specific structure of the connection unit. Here, the connecting unit includes a connecting member 52' and an abutting member 53' which are connected to each other, and the connecting member 52' is connected to the second housing 44 and passes through the through hole 64 provided in the first housing 42, the abutting member 53 'Located in the inner housing space of the first housing 42, the abutting surface 54 is disposed on the abutting member 53'. In the present embodiment, the end portion of the connecting member 52' away from the second housing 44 is connected to the central portion of the abutting member 53', and the abutting surface 54 is provided at both ends of the abutting member 53'. The extending direction of the abutting member 53' and the extending direction of the connecting member 52' are vertically disposed. The connecting member 52' extends in a direction parallel to the center plane XY. The abutting surface 54 is a convex surface, and the abutting member 53' is provided with two abutting faces 54 disposed away from each other.

The number of the vibration damping body 58 and the contact surface 56 are two, respectively, to be mated with the both ends of the abutting member 53'.

In the technical solution, the connecting member 52' extends longitudinally away from one end of the abutting member 53' such that the connecting member 52' and the second housing 44 are connected by two screws, so that the connecting member 52' is connected to the second housing 44. more reliable.

The number of contact faces 56 is two, and the two contact faces 56 are arranged symmetrically with respect to the axis X of the motor shaft 26. Preferably, the openings of the two contact faces 56 are oriented opposite each other.

The contact surface 56 is disposed in an inner receiving space of the motor housing 46 away from the tail of the output shaft 22. Typically, the body of the motor 20 (e.g., the stator and rotor) is relatively bulky, while the body of the motor 20 that is remote from the side of the output shaft 22 (e.g., commutator and support bearing, etc.) is relatively small in size and, therefore, will be in contact. The surface 56 is disposed in the inner accommodating space of the motor casing 46 away from the tail portion of the output shaft 22. The remaining space of the motor casing 46 can be fully utilized, and the structural layout is reasonable, and the volume of the motor casing 46 is not increased, and the operation comfort is improved.

The motor housing 46 includes a first partial housing 76 and a second partial housing 78 that are interconnected, the first partial housing 76. The bulky body member of the motor 20, such as the stator and the rotor, is mounted, and the second housing half 78 is disposed on the side of the first housing half 76 away from the output shaft 22. As previously mentioned, the number of contact faces 56 is two. In the present solution, the two contact faces 56 are integrally formed on the second partial housing 78 of the motor housing 46. Specifically, the second half-shell 78 faces the end of the motor 20 integrally formed with a cylindrical receiving portion 82 whose one end is closed, and the extending axis of the cylindrical receiving portion 82 is perpendicular to the axis X of the motor shaft 26 . The second housing half 78 further includes a cover 86 detachably coupled to the cylindrical housing portion 82. The opening of the cover 86 is opposed to the opening of the cylindrical housing portion 82, and the space enclosed therebetween is the interior of the motor housing 46. Part of the containment space. Here, the abutting member 53' faces the first side, meaning that the abutting member 53' is located in a space enclosed between the cover 86 and the cylindrical housing portion 82. The cover 86 is connected to the cylindrical housing portion 82 by screws, and has a simple structure. The first contact surface is the inner contour of the closed end of the cylindrical receiving portion 82, and the second contact surface is the concave inner contour of the cover 86 such that the openings of the two contact surfaces 56 are oriented opposite each other.

At the time of mounting, one damper body 58 is fitted into the cylindrical accommodating portion 82, one end of the abutting member 53' of the connecting unit is abutted against one damper body 58, and the other damper body 58 is abutted against the abutment. The other end of the piece 53', then the cover 86 receives the second damper body 58 and is screwed to the cylindrical accommodating portion 82, and the second half-shell 78 is connected to the first half-shell 76, and finally The second housing 44 is mounted on the connector 52'. The structure is reasonable and easy to install.

The damper body 58 is located in the inner accommodating space of the motor casing 46. Accordingly, the portion of the second casing 44 where the connecting unit is disposed is located outside the motor casing 46 of the first casing 42, if the motor casing of the first casing 42 is to be 46 is regarded as the first motor casing, and the portion in which the second casing 44 is provided with the connection unit can be regarded as the second motor casing. The damper body can reduce vibration transmitted by the first motor case to the second motor case. Providing a vibration damping device between the motor housing 46 and the second housing 44 may be referred to as a motor housing vibration damping device.

The plane in which the axis Y of the output shaft 22 is located is an intermediate plane, and a motor casing damping device is disposed on each side of the intermediate plane. Preferably, the median plane is arranged parallel to the axis X of the motor shaft 26. More preferably, the two motor casing damper devices are symmetrically disposed with respect to a central plane defined by the axis X of the motor shaft 26 and the axis Y of the output shaft 22. It will be appreciated by those skilled in the art that motor casing damping means may be provided only on either side of the intermediate plane.

Of course, as will be appreciated by those skilled in the art, the connecting unit disposed between the head case and the second housing and the connecting unit disposed between the motor case and the second housing may be interchanged; Between the two housings, between the motor housing and the second housing, a connection unit between the head housing and the second housing as described above is provided; likewise, between the head housing and the second housing A motor unit and the second housing are disposed between the motor housing and the second housing as described above. And in the middle plane The two connecting units and the two damper bodies are disposed on one side and are not limited between the head case and the second case and between the motor case and the second case, and may be disposed on the motor case and the second case. Between or between the head shell and the second housing.

The Applicant has found that although the vibration damping body can reduce the vibration, it is not as conventionally assumed that the more the number of vibration damping bodies, the better the vibration damping effect. When the number of vibration damping bodies exceeds a certain value, the damping effect decreases. . Preferably, the number of the vibration damping bodies on one side of the intermediate plane is 2 to 5. When 2 to 5 damper bodies are provided on one side of the intermediate plane, the 2 to 5 damper bodies can be referred to as motor case damper devices. Of course, preferably, two to five damping bodies are disposed on both sides of the intermediate plane, and most preferably, the number of the damping bodies disposed on both sides of the intermediate plane is the same and symmetrically disposed. Any technical solutions that are the same as or similar to the technical solutions are to be covered by the scope of the present invention.

[Second embodiment]

FIG. 7 shows a simplified schematic diagram of a power tool 200 provided by a second embodiment of the present invention.

In order to simplify the description, the main differences between the power tool 200 of the present embodiment and the swing power tool 100 of the first embodiment will be mainly described below.

In this embodiment, four connection units having the same structure are disposed between the first housing 242 and the second housing 244. Each of the connecting units includes a connecting member 252 and an abutting member 253 disposed perpendicularly to the connecting member 252. The first end of the connecting member 252 is coupled to the second housing 244, and the second end of the connecting member 252 passes through the first housing 242. The through hole 264 is inserted into the inner receiving space 260 of the first housing 242, and the abutting member 253 is connected to the second end of the connecting member 252. The abutting surface 254 is the abutting member 253 facing the first housing 242. Inner contour.

Here, the first side of the first housing 242 facing away from the second housing 244 includes an inner contour of the first housing 242 and an inner receiving space 260, and the abutting member 253 faces the first side, and may be located at the abutting member 253. In the inner receiving space 260, the abutting surface 254 faces the inner contour of the first housing 242. The support is part of the inner contour. The contact surface 256 is disposed on a portion of the inner contour of the first housing 242, and the damping body 258a-d abuts between the abutment 253 and the first housing 242.

In this embodiment, one end of the abutting member 253 of the connecting unit is connected to the second end of the connecting member 252 away from the second casing, so that the connecting unit is L-shaped. It will be appreciated by those skilled in the art that the middle portion of the abutting member 253 of the connecting unit is connected to the second end of the connecting member 252 such that the connecting unit is T-shaped. In this embodiment, the vibration damping bodies 258a-d are in a block shape, and those skilled in the art can conceive that if the connection unit is T-shaped, the vibration damping bodies 258a-d can be correspondingly annular.

In this embodiment, the number of the connecting unit and the damper bodies 258a-d is four. Technical person It is conceivable that the number of damping bodies can be set as desired, and is not limited to the four listed in the specific embodiment.

In this embodiment, the specific positions of the four damper bodies 258a-d are arranged: four damper bodies 258 are disposed in the motor casing 246 of the accommodating motor M, the first damper body 258a and the second damper body The 258b is axially spaced from the axis X of the motor M. The third damper body 258c and the first damper body 258a are circumferentially spaced apart from the axis X of the motor M. Preferably, the third damper body 258c and the first damper body 258a are circumferentially spaced by 180 degrees along the axis X of the motor M, which also causes the third damper body 258c and the first damper body 258a to oppose the axis of the motor M. X symmetric setting. The fourth damper body 258d and the second damper body 258b are circumferentially spaced apart from the axis X of the motor M. Preferably, the fourth damper body 258d and the second damper body 258b are circumferentially spaced apart by 180 degrees with respect to the axis X of the motor M, which also causes the fourth damper body 258d and the second damper body 258b to be opposite to the axis of the motor M. X symmetric setting. With this setting, the structure layout is regular and the design is reasonable.

[Third embodiment]

Fig. 8 is a simplified schematic view showing a vibration damping structure of a power tool according to a third embodiment of the present invention.

The power tool of the present embodiment is different from the power tool 200 of the second embodiment in that the connecting unit has a "mouth" type with one side opening, and includes an abutting member 253 and two connecting members 252. The two connecting members are spaced apart by a certain distance. The abutment 253 is connected to both connectors 252. Specifically, the two connecting members 252 have the same length and are arranged in parallel, and the same side ends of the two connecting members 252 are connected to the second housing 244. The first housing 242 has two through holes disposed at a certain distance, two The connecting member 252 passes through the two through holes and extends into the inner receiving space of the first housing 242. The abutting member 253 is located in the inner receiving space of the first housing 242 and is away from the two connecting members 252. The ends of the two housings 244 are connected, and the damping body 258 abuts between the inner contour of the first housing 242 and the abutment 253.

[Fourth embodiment]

9 to 15 show a power tool 300 according to a fourth embodiment of the present invention.

Referring to FIG. 9 and FIG. 10, the power tool 300 of the present embodiment is a swinging power tool, comprising a housing, a motor 320 housed in the housing, an output shaft 322 driven by the motor 320 for mounting the working head W, and a fixing member 324. The working head W is fixed to the output shaft 322 in cooperation with the free end of the output shaft 322. The power tool 300 further includes a grip portion 350 disposed on the housing, and the operator controls the movement of the power tool relative to the workpiece by the grip portion 350 to process the workpiece.

In the present embodiment, the axis X of the motor shaft 326 of the motor 320 is substantially perpendicular to the axis Y of the output shaft 322. Preferably, the axis X of the motor shaft 326 is coplanar with the axis Y of the output shaft 322 to form a center. Plane XY. It will be appreciated by those skilled in the art that the axis X of the motor shaft 326 and the axis Y of the output shaft 322 may also be non-coplanar, or coplanar but not perpendicular, such as the axis X of the motor shaft 326 being parallel or in line with the axis Y of the output shaft 322. Other angles are available.

An eccentric transmission mechanism 328 is disposed between the motor 320 and the output shaft 322, and the rotational motion of the motor shaft 326 is converted into a rotational reciprocating oscillating motion of the output shaft 322 about its axis Y by the eccentric transmission mechanism 328. The direction of the swing is as shown by arrows R-R in Figs. 9 and 10. When the free end of the output shaft 322 is connected with different working head accessories, such as a straight saw blade, a circular saw blade, a triangular sanding disc, etc., cutting or grinding operations can be realized.

The working head W swings with the output shaft 322 to form a swing plane S. The oscillating plane S can be regarded as a plane formed by any one of the straight lines perpendicular to the output shaft 322 on the working head W that oscillates with the output shaft 322. In Fig. 9, the working head W is a saw blade, and any one of the upper and lower surfaces of the saw blade can be regarded as a swinging plane of the saw blade. The oscillating plane S is perpendicular to the center plane XY and perpendicular to the axis Y of the output shaft 322. At the position where the oscillating power tool shown in Fig. 9 is located, the center plane XY is the plane of the paper of Fig. 9, and the oscillating plane S is perpendicular to the plane of the paper and perpendicular to the axis Y of the output shaft 322.

The eccentric transmission mechanism 328 of the present embodiment has the same structure as the eccentric transmission mechanism 28 of the oscillating power tool 100 of the first embodiment, and will not be described again.

Referring to FIG. 10, FIG. 11, and FIG. 12, in order to reduce the vibration of the grip portion on the casing, the comfort of the operation is improved. In this embodiment, the housing includes an inner housing 342 and an outer housing 344 located outside the inner housing 342 with a gap 343 between the inner housing 342 and the outer housing 344.

In the present embodiment, the outer casing 344 has an outer contour 345 facing away from the motor 320. The outer contour 345 is provided with a grip portion 350, or the outer casing 344 is provided with a grip on the outer contour 345 of the inner casing 342. Hold the department 350. The operator operates the power tool 300 by gripping the grip portion 350 on the outer contour 345 of the outer casing 344 for easy and secure grip.

By providing a double-layered housing, vibrations of the motor 320 and the output shaft 322 are transmitted through the inner housing 342 to the outer housing 344 located outside the inner housing 342, and the grip portion 350 on the outer contour 345 of the outer housing 344 can be reduced. Vibration.

The inner casing 342 includes a motor casing 346 for mounting the motor 320 and a head casing 348 for accommodating a portion of the output shaft 322. It will be appreciated by those skilled in the art that the inner housing 342 includes only the motor housing 346 for mounting the motor 320 or only the head housing 348 for receiving a portion of the output shaft 322.

Motor housing 346 is used to mount motor 320, which may be designed to partially or completely enclose motor 20, as desired.

The head shell 348 receives a portion of the output shaft 322, that is, the output shaft 322 receives the portion in the head shell 348, but the free end thereof protrudes out of the head shell 348 to facilitate the engagement with the fixing member 324 to clamp the working head W to the output shaft 322. Between the end and the fixture 324.

In the present embodiment, the inner casing 342 further includes a middle cover 347 that is coupled between the motor casing 346 and the head casing 348. The middle cover 347 is screwed to both the motor case 346 and the head case 348, and the middle cover 347 is for housing a cooling fan driven by the motor 320. Thus, the inner casing 342 includes the motor casing 346, the middle cover 347, and the head casing 348 which are sequentially connected, which can make the manufacture of the inner casing 342 simple, and those skilled in the art can also think of the middle cover 347 and The motor casing 346 and/or the head casing 348 are integrally provided, and any technical solutions identical or similar to those of the present embodiment are intended to be covered by the scope of the present invention.

In order to further reduce the vibration, the power tool 300 of the present embodiment is also provided with a vibration damping body.

Similar to the first embodiment, the power tool of the present embodiment also has a head shell damping scheme and a motor casing damping scheme. However, the head shell vibration damping scheme of the present embodiment is an external contour peripheral vibration damper body of the outer casing corresponding to the outer casing of the inner casing; the motor casing vibration damping scheme of the embodiment is still provided in the inner accommodating space of the motor casing. Damping body.

The head shell damping scheme of this embodiment will be described below first.

In the technical solution, the plane where the axis Y of the output shaft 22 is located is defined as a middle plane, and one vibration damping body is disposed on both sides of the intermediate plane, and the two vibration damping bodies are symmetrically arranged with respect to the intermediate plane and the installation structure is the same. Preferably, the two damping bodies are arranged symmetrically with respect to an intermediate plane parallel to the axis X of the motor shaft 26 and the mounting structure is the same. More preferably, the axis X of the motor shaft 26 and the axis Y of the output shaft 22 are coplanar, and the two damping bodies are symmetrically disposed with respect to the central plane defined by the axis X of the motor shaft 26 and the axis Y of the output shaft 22, and the mounting structure is the same. One of the damper bodies and their mounting structure will be described in detail below.

In the present technical solution, the outer casing 344 corresponds to the first casing, the inner casing 342 corresponds to the second casing, and the first casing (the outer casing 344) has the first casing facing away from the second casing (the inner casing 342) On one side, a support member is disposed on the first side, and a connecting unit is disposed on the second casing (the inner casing 342). The connecting unit has an abutting member on the first side, and the supporting member and the abutting member are disposed between A vibration damping device, here, the vibration damping device includes a vibration damping body. Also in the present technical solution, the first side of the first casing (outer casing 344) facing away from the second casing (the inner casing 342) includes an outer contour 345 and an outer space disposed outside the outer contour 345.

Referring to FIGS. 11 and 12, the outer casing 344 is provided with a through hole 364, and a gap 343 between the inner casing 342 and the outer casing 344 communicates with the outer contour 345 of the outer casing 344 through the through hole 364.

The inner casing 342 is provided with a connecting unit. The connecting unit includes a connecting member 352 connected to the inner casing 342 and an abutting member 353 connected to the connecting member 352. The connecting member 352 extends through the through hole 364 to extend the outer wheel. Outside the profile 345, the outer contour 345 of the outer casing 344 has a contact surface 356, the abutment 353 is located outside the outer contour 345 and has an abutment surface 354 opposite the contact surface 356, and a force is provided between the contact surface 356 and the abutment surface 354. The transmission member 358 is elastically deformable to resist vibration due to internal friction caused by damping. In other words, the force transmission member 358 is a vibration damping body.

Since the connecting unit provided with the abutting surface 354 is connected to the inner casing 342, and the contact surface 356 is disposed on the outer contour 345 of the outer casing 344, the abutting surface 354 and the contact surface 356 are elastically deformed to resist damping. The resulting internal friction force transmitting member 358 is equivalent to a force transmitting member 358 provided between the inner casing 342 and the outer casing 344 that is elastically deformable to resist internal friction due to damping. Thus, the force transfer member 358 can reduce the motion transmitted between the inner housing 342 and the outer housing 344, such as reducing the impact or vibration transmitted by the inner housing 342 to the outer housing 344, particularly attenuating high frequency oscillations such as vibration or noise. The inner casing 342 is transmitted to the outer casing 344, thereby reducing vibration of the grip portion 350 and reducing environmental noise, thereby improving operational comfort.

The connector 352 is coupled to the inner housing 342, and the connector 352 and the inner housing 342 can be two separate components and the connector 352 can be mounted to the inner housing 342. The mounting method can be varied, either screw or interference fit, or other mounting methods such as soldering. The connector 352 and the inner casing 342 may also be integrally formed. In the technical solution, the inner casing 342 is provided with a portion of the connecting member 352 made of plastic, the connecting member 352 is integrally formed with the inner casing 342, and the connecting member 352 is also made of plastic. Those skilled in the art will appreciate that the connector 352 may be made of a metal material such as an aluminum alloy in addition to plastic to improve strength and service life.

Preferably, the connecting member 352 extends longitudinally, and its longitudinal extension direction is substantially perpendicular to the extending direction of the inner casing 342. Preferably, the longitudinal extension direction of the connecting member 352 is perpendicular to the axis X of the motor 320 and the axis Y of the output shaft 322, that is, the longitudinal extension direction of the connecting member 352 is perpendicular to the central plane XY.

The abutment 353 is coupled to the connector 352. In the present technical solution, since the abutting surface 354 is disposed on the abutting member 353, the cross-section of the abutting member 353 in a direction substantially parallel to the central plane XY is larger than the cross-section of the connecting member 352, and the abutting member 353 is substantially The cross section in the direction parallel to the center plane XY is larger than the cross section of the through hole 364. Therefore, in order to facilitate the installation, in the present technical solution, the abutting member 353 and the connecting member 352 are two separate members and are mounted together. The mounting method of the present technical solution is a screw (not shown) connection, and those skilled in the art may think that other mounting methods, such as interference fit or welding, may also be used. In the technical solution, the connecting member 352 is made of plastic, and the abutting member 353 is also made of plastic. It is conceivable to those skilled in the art that the abutting member 353 can be made of metal or metal. Such as aluminum alloy, etc., to improve strength and service life.

Preferably, the number of the connecting members 352 is two, the two connecting members 352 are disposed at a distance, and the abutting member 353 is connected to the two connecting members 352. Preferably, the two connecting members 352 are connected to the edges of the abutting members 353, which can improve the mounting stability of the abutting members 353, thereby improving the reliability of use of the whole machine.

It is to be understood by those skilled in the art that only one connector is provided, and the connector may be connected to the middle portion of the abutting member. Any technical solution that is the same as or similar to the technical solution should be covered by the technical solution.

Those skilled in the art will appreciate that all of the connectors 352 that are coupled to one of the abutments 353 can be viewed as a group. In the technical solution, the set of connecting members 352 are connected to the head shell 348 of the inner casing 342. It is conceivable to those skilled in the art that the connecting members 352 can also be connected to the motor casing 346 of the inner casing 342; or, this group A part of the connector 352 is connected to the head case 348, a part of the connector 352 is connected to the motor case 346, or two or more sets of connectors 352, one or more sets of connectors 352 and the inner case are provided. The head shells 348 of the body 342 are coupled, and one or more sets of connectors 352 are coupled to the motor housing 346 of the inner housing 342.

In this embodiment, one connecting unit includes two connecting members 352 and one abutting member 353. The number of connecting units is two, which are connected to the head casing 348 of the inner casing 342 and are symmetrically arranged with respect to the axis Y of the output shaft 322, preferably with respect to the axis of the motor and the axis of the output shaft. The center plane is symmetrically set.

The outer casing 344 is provided with a through hole 364 that allows the gap 343 between the inner casing 342 and the outer casing 344 to communicate with the outer contour 345 of the outer casing 344. The through hole 364 also allows the connector 352 to extend beyond the outer contour 345 of the outer casing 344 through the through hole 364.

In the present technical solution, there is a gap between the connecting member 352 and the through hole 364. After the connecting member 352 passes through the through hole 364 and is connected with the abutting member 353, the gap between the connecting member 352 and the through hole 364 causes the connecting member 352 and the through hole 364 to always not contact, so that the inner casing connected to the connecting member 352 The body 342 and the outer casing 344 provided with the through holes 364 are always in contact, and vibration is prevented from being directly transmitted from the inner casing 342 to the outer casing 344, thereby reducing vibration and improving operational comfort.

The outer contour 345 of the outer casing 344 has a contact surface 356. In the present embodiment, the outer contour 345 of the outer casing 344 is provided with a support member 366 which is disposed on the support member 366. Preferably, the outer contour 345 of the outer casing 344 is provided with a portion of the support member 366 that is recessed in a direction toward the inner casing 342 with respect to the outer contour 345 of the other portion of the outer casing 344, such that when the abutment 353 After being connected to the connecting member 352, the difference in height between the outer surface of the abutting member 353 and the outer contour 345 of the other portion of the outer casing 344 is small, so that the entire power tool 300 has a regular appearance and a beautiful appearance.

Therefore, after the abutting member 353 is connected to the connecting member 352, the abutting member 353 is located outside the contact surface 356 of the outer casing 344 and has an abutting surface 354 opposite to the contact surface 356 to facilitate the attachment of the force transmitting member 358 to the abutment. Between face 354 and contact face 356.

The force transmitting member 358 maintains a predetermined minimum spacing between the abutting surface 354 and the contact surface 356 such that there is always a gap 343 between the inner casing 342 and the outer casing 344, and the inner casing 342 and the outer casing 344 are not in contact at all times. The vibration can be prevented from being directly transmitted from the inner casing 342 to the outer casing 344, thereby reducing the vibration of the grip portion 350 and improving the operational comfort.

In the technical solution, the support member 366 extends longitudinally, and its longitudinal extension direction is substantially perpendicular to the outer casing 344. Preferably, the longitudinal extension direction of the support member 366 is perpendicular to the axis X of the motor 320 and the axis Y of the output shaft 322, that is, the longitudinal extension direction of the support member 366 is perpendicular to the center of the motor axis X and the output shaft 22 axis Y. Plane XY. More preferably, the longitudinal extension of the support member 366 is parallel to the longitudinal extension of the connector 352.

The support member 366 extends longitudinally from the outer contour 345 of the outer casing 344. Accordingly, the abutment surface 354 of the abutment 353 is recessed in a direction away from the outer casing 344.

After the force transmitting member 358 is installed between the support member 366 and the abutting member 353, the force transmitting member 358 covers the portion of the supporting member 366 and receives the portion in the recessed abutting member 353. As such, the force transmitting member 358 is in contact not only with the end surface of the support member 366 but also with a circumferentially extending surface of the support member 366 which extends longitudinally, the circumferential surface being adjacent to the end surface. Thereby, the force transmitting member 358 can not only reduce the vibration of the support member 366 in the axial direction but also reduce the vibration of the support member 366 in the circumferential direction.

Since the vibration of the oscillating power tool is largest in the direction parallel to the oscillating plane S formed by the oscillating motion of the output shaft 322, it is preferable in the present invention that the main force direction of the force transmitting member 358 is parallel to the oscillating plane S and The axis X of the motor 320 is vertical, and the vibration transmitted from the inner casing 342 to the outer casing 344 can be minimized.

Since the axial direction of the support member 366 is perpendicular to the center plane XY formed by the motor axis X and the axis Y of the output shaft 22, the swing plane S formed by the working head swinging with the output shaft 322 is perpendicular to the center plane XY, that is, the support member The axial direction of the 366 is parallel to the swing plane S and perpendicular to the axis X of the motor 320. Therefore, the main force direction of the force transmitting member 358 is the axial direction of the support member 366.

Preferably, after being mounted between the support member 366 and the abutment member 353, the force transmitting member 358 is compressed to be elastically deformed and prestressed to resist internal friction due to damping. Preferred, force The transmitting member 358 is prestressed in each spatial direction, and the magnitude of the prestress in each spatial direction is different. Preferably, the main action direction of the prestressing force of the force transmitting member 358 is parallel to the swinging plane S formed by the working head swinging with the output shaft 322 and perpendicular to the axis X of the motor 320.

Since the axial direction of the support member 366 is perpendicular to the center plane XY formed by the motor axis X and the axis Y of the output shaft 22, the swing plane S formed by the work head W swinging with the output shaft 322 is perpendicular to the center plane XY, that is, the support The axial direction of the member 366 is parallel to the swing plane S and perpendicular to the axis X of the motor 320. Therefore, the pre-stress of the force transmitting member 358 is greatest in the axial direction of the support member 366, that is, the main prestress of the force transmitting member 358. The direction of action is the axial direction of the support member 366.

In this embodiment, the contact surface 356 is a convex surface, and the contact surface 356 is disposed on the support member 366, and the convex surface is a curved surface. The abutting surface 354 is a concave surface, and the abutting surface 354 is disposed on the abutting member 353, and the concave surface is also a curved surface, so that the force transmitting member 358 is prestressed in each spatial direction perpendicular to the curved surface. The vibration transmitted from the inner casing 342 to the outer casing 344 can be better reduced. It is to be understood by those skilled in the art that a shape such as a plane or a sphere may be used in addition to the curved surface, and any technical solution similar to the present technical solution should be covered within the scope of the present invention.

In the technical solution, the force transmitting member 358 is in the form of a flat plate in an unassembled state, and is in the shape of a bowl after the assembly is completed. That is, the force transmitting member 358 has no recess in the unassembled state, but after being fitted between the support member 366 and the abutting member 353, is elastically deformed by compression to form a recess portion matching the protruding support member 366. . Since the force transmitting member 358 is in the form of a flat plate in the unassembled state, the manufacture of the force transmitting member 358 becomes simple. It is to be understood by those skilled in the art that the force transmitting member 358 is in the shape of a bowl in an unassembled state, and any technical solution similar to the present technical solution should be covered within the scope of the present invention.

The force transmission member 358 is made of an elastic material such as a part made of a material such as polyurethane (PU), rubber, or elastic metal, or a part made of a combination of these materials, or a combination of parts made of different single materials. . Preferably, the force transmitting member 358 using cellular polyurethane elastomers, the density of the elastomer is between 0.35 to 0.65kg / dm ^3, preferably 0.4kg / dm ^3. Applicants have discovered that such an elastomer minimizes the vibration transmitted by the inner casing 342 to the outer casing 344, thereby maximizing operational comfort.

When the power tool 300 of the present technical solution is installed, after the inner casing 342 is installed, the connecting member 352 connected to the inner casing 342 is aligned with the through hole 364 of the outer casing 344 and passes through the through hole 364 to The 344 sleeve is disposed on the inner casing 342; then, the force transmitting member 358 is received in the recessed abutting member 353; finally, the abutting member 353 and the connecting member 352 are connected by screws (not shown). By It can be seen that the power tool 300 of the present technical solution is convenient and quick to install, and the force transmission member 358 is mounted on the outer surface of the outer casing 344, and the installation visibility is good, so that the installation is more convenient and quick.

13 to 15 show a motor case vibration damping scheme of the power tool of the present embodiment.

In order to simplify the description, the main differences and key features of the motor casing vibration damping scheme of the present embodiment and the motor casing vibration damping scheme of the power tool of the first embodiment are mainly described below.

In the present technical solution, the inner casing 342 is equivalent to the first casing, the outer casing 344 is equivalent to the second casing, and the first casing (the inner casing 342) has the first casing facing away from the second casing (the outer casing 344) On one side, a support member is disposed on the first side, and a connecting unit is disposed on the second casing (the outer casing 344). The connecting unit has an abutting member facing the first side, and the connecting member and the abutting member are provided with a reduction The vibration device, here, the vibration damping device includes a vibration damping body. Moreover, in the present technical solution, the first side of the first housing (inner housing 342) facing away from the second housing (outer housing 344) includes an inner contour of the inner housing 342 and an inner receiving space.

In the present technical solution, the outer casing 344 is disposed outside the inner casing 342, but the outer casing 344 has an extended length smaller than the extended length of the inner casing 342. Specifically, the outer casing 344 has a first end and a second end, the second end being remote from the output shaft of the power tool relative to the first end, and the inner casing 342 extending beyond the second end of the outer casing 344. The second end of the outer casing 344 has an end surface 349 that is perpendicular to the motor shaft, and the connecting unit is disposed on the end surface 349. Preferably, the connecting unit is integrally formed on the outer casing. Specifically, the connecting unit includes a connecting member 352 ′ and an abutting member 353 ′, the connecting member 352 ′ is perpendicular to the end surface 349 and extends longitudinally from the end surface 349 in a direction away from the output shaft, and the abutting member 353 ′ extends longitudinally, and The middle portion of the abutting member 353' is connected to the end of the connecting member 352' away from the output shaft, and the two end faces of the abutting member 353' are abutting faces 354.

The second half-shell 378 of the motor casing of the inner casing 342 includes detachably mounted left and right half shells, and the left half shell and the right half shell are each provided with a cylindrical receiving portion 382 closed at one end, when the left half shell and After the installation of the right half-shell is completed, the space enclosed by the two cylindrical housing portions 382 is a part of the internal housing space of the motor casing. The two contact faces 356 are each part of the inner contour of the closed end of the two cylindrical receptacles 382.

The two force transmitting members 358 each abut between the opposing abutment surface 354 and the contact surface 356.

[Fifth Embodiment]

Fig. 16 is a schematic view showing a vibration damping structure of a power tool according to a fifth embodiment of the present invention.

Referring to FIG. 16, similar to the head shell vibration damping scheme of the fourth embodiment, the power tool includes an inner casing 442, an outer casing 444 located outside the inner casing 442, and a gap 443 between the inner casing 442 and the outer casing 444. The outer casing 444 has an outer contour 445 facing away from the inner casing 442. The outer casing 444 is provided with a through hole 464. The gap 443 and the outer contour 445 are communicated through the through hole 464, and the inner casing 442 is provided with a connection. The connecting unit includes a connecting member 452 connected to the inner casing 442 and an abutting member 453 connected to the connecting member 452. The connecting member 452 protrudes out of the outer contour 445 through the through hole 464, and the outer contour 445 has a contact surface 456. The abutting member 453 is located outside the outer contour 445 and has an abutting surface 454 opposite to the contact surface 456. A force transmitting member 458 is disposed between the contact surface 456 and the abutting surface 454. The force transmitting member 458 is elastically deformable to resist damping. The resulting internal friction. The vibration transmitted from the inner casing 442 to the outer casing 444 is thereby reduced.

In order to simplify the description, the main differences and key features of the power tool of the present embodiment and the head shell vibration damping scheme of the power tool of the fourth embodiment are mainly described below.

In this embodiment, the number of the connecting members 452 of the connecting unit is one, and the connecting member 452 is connected to the middle portion of the abutting member 453. Preferably, the connecting member 452 is integrally formed with the abutting member 453. The connector 452 is connected to the inner housing 442 by an interference fit through the through hole 464 of the outer housing 444.

In this embodiment, the outer contour 445 of the outer casing 444 is provided with a recessed portion 461 having a bottom surface 4611 and a circumferential surface 4612 extending around the periphery of the bottom surface 4611 and extending longitudinally. The contact surface 456 on the outer contour 445 includes at least the bottom surface 4611 of the recess 461.

The abutting member 453 is received in the recessed portion 461, and includes a lower surface 4531 facing the bottom surface 4611 of the recessed portion 461, a side surface 4532 surrounding the lower surface 4531 and abutting the lower surface 4531, and a side surface 4532 adjoining and away from the inner casing 442 Upper surface 4533. The abutment surface 454 on the abutment 453 includes at least a lower surface 4531.

A force transmitting member 458 is provided between the contact surface 456 and the abutment surface 454, and the force transmitting member 458 is elastically deformable to resist internal friction due to damping.

Since the abutting member 453 provided with the abutting surface 454 is connected to the inner casing 442 by the connecting member 452, and the contact surface 456 is disposed on the outer contour 445 of the outer casing 444, a force is set between the abutting surface 454 and the contact surface 456. The transmission member 458 is equivalent to a force transmitting member 458 disposed between the inner casing 442 and the outer casing 444. Thereby, the force transmitting member 458 can reduce the vibration transmitted from the inner casing 442 to the outer casing 444, thereby reducing the vibration of the grip portion and improving the operational comfort.

Similar to the first embodiment, the force transmitting member 458 maintains the predetermined minimum spacing L1 between the abutting surface 454 and the contact surface 456 to ensure that the inner casing 442 and the outer casing 444 are not in contact, thereby avoiding direct vibration of the inner casing 442. Transfer to the outer casing 444.

In this embodiment, the bottom surface 4611 of the recessed portion 461 and the lower surface 4531 of the abutting member 453 are both planar, and the force transmitting member 458 abuts between the planar recessed portion bottom surface 4611 and the abutting member lower surface 4531, and has a simple structure. .

In this embodiment, the side surface 4532 of the abutting member 453 is disposed at a distance from the circumferential surface 4612 of the recessed portion 461. The force transmitting member 458 abuts against the side surface 4532 of the abutting member 453 and the circumferential surface 4612 of the recessed portion 461 after the assembly is completed. That is, the abutting surface 454 includes not only the lower surface 4531 of the abutting member 453 but also a side surface 4532 adjacent to the lower surface 4531. The contact surface 456 includes not only the bottom surface 4611 of the recess portion 461 but also a portion enclosing the bottom surface 4611. Circumferential surface 4612.

With this arrangement, it is possible to reduce the vibration not only in the axial direction of the connecting member 452 but also in the direction perpendicular to the axial direction of the connecting member 452. It will be appreciated by those skilled in the art that the force transmitting member 458 may only abut against the lower surface 4531 of the abutting member 453 and the bottom surface 4611 of the recessed portion 461 after the assembly is completed.

The force transmitting member 458 is clamped between the lower surface 4531 and the side surface 4532 of the abutting member 453 and the bottom surface 4611 of the recessed portion 461 and the partial circumferential surface 4612 after the assembly is completed, that is, the force transmitting member 458 is in the shape of a bowl after the assembly is completed. . Similar to the foregoing embodiment, the force transmitting member 458 may be in the shape of a bowl in an unassembled state; it may also be planar in an unassembled state, and is in the shape of a bowl only after the assembly is completed.

In the embodiment, in the longitudinal extension direction of the connecting member 452, the upper surface 4533 of the abutting member 453 is close to the inner casing 442 with respect to the top end opening of the circumferential surface 4612 of the recessed portion 461, so that the abutting member 453 is completely accommodated. In the recessed portion 461, the tip end opening of the circumferential surface 4612 of the recessed portion 461 is provided in the dustproof cover 463. The dust cover 463 has a small difference from the height of the outer contour 445 around the recess 461 of the outer casing 444, and not only protects the connecting unit and the force transmitting member 458, but also has a regular appearance and a beautiful appearance of the power tool.

It is conceivable by those skilled in the art that by appropriately arranging the longitudinal length of the circumferential surface 4612 of the recess 461, the upper surface 4533 of the abutment 453 is substantially equal to the outer contour 445 of the periphery of the recess 461 of the outer casing 444. The technical solutions similar to those of the present embodiment are all covered by the scope of the present invention.

[Sixth embodiment]

17 to 20 show a power tool 500 according to a sixth embodiment of the present invention.

The power tool 500 of the present embodiment is similar in structure to the power tool 300 of the fourth embodiment. For the sake of brevity of the description, the main differences and key features of the power tool 500 of the present embodiment and the power tool 300 of the fourth embodiment are mainly described below.

Referring to FIG. 17 and FIG. 18, the housing of the power tool 500 of the present embodiment includes an inner casing 542, an outer casing 544 located outside the inner casing 542, an inner casing 542 and an outer casing 544, as in the fourth embodiment. There is a gap therebetween, and N damping bodies 558 are disposed between the inner casing 542 and the outer casing 544 to reduce the inner portion. The housing 542 transmits vibration to the outer casing 544.

As in the fourth embodiment, the inner casing 542 of the present embodiment includes a first head casing 591 for accommodating a portion of the output shaft 522, and a first motor casing 593 for accommodating at least a portion of the motor. The outer casing 544 includes a second head case 595 located outside the first head case 591 with a gap between the first head case 591 and the second head case 595. The outer casing 544 further includes a second motor casing 597 located outside the first motor casing 593 with a gap between the first motor casing 593 and the second motor casing 597.

As in the fourth embodiment, the power tool 500 of the present embodiment has a head shell vibration damping scheme, that is, a head shell vibration damping device 580 is disposed between the first head shell 591 and the second head shell 595. The power tool 500 of the present embodiment also has a motor casing vibration damping scheme in which a motor casing damping device 590 is provided between the first motor casing 593 and the second motor casing 597.

The plane in which the axis Y of the output shaft 522 is defined is defined as the intermediate plane. A head shell damping device is provided on at least one side of the intermediate plane. Preferably, the median plane is parallel to the axis X of the motor shaft (not shown). Preferably, the axis X of the motor shaft and the axis Y of the output shaft 522 are coplanar to form a center plane XY, and a head shell damper 580 is symmetrically disposed on both sides of the center plane XY. Preferably, the number of head shell vibration damping devices 580 on both sides of the center plane is the same as the mounting structure. In the present embodiment, the head shell damper device 580 is symmetrically disposed on both sides of the center plane.

A motor casing damping device is provided on at least one side of the intermediate plane. Preferably, the median plane is parallel to the axis X of the motor shaft (not shown). Preferably, the axis X of the motor shaft and the axis Y of the output shaft 522 are coplanar to form a center plane XY, and motor casing damper 590 is symmetrically disposed on both sides of the center plane XY. Preferably, the number of motor housing dampers 590 on both sides of the center plane and the mounting structure are the same. In the present embodiment, the motor casing vibration damping device 590 is symmetrically disposed on both sides of the center plane.

The head shell damping scheme on the side of the intermediate plane will be described below.

Referring to FIG. 17 and FIG. 18, the main difference between the head shell vibration reduction scheme of the power tool 500 of the present embodiment and the head shell vibration reduction scheme of the power tool 300 of the fourth embodiment is: in the head shell vibration reduction scheme of the fourth embodiment, The head shell vibration damping device includes only one vibration damping body; in the head shell vibration damping scheme of the present embodiment, the head shell vibration damping device 580 includes two vibration damping bodies 558.

In the technical solution, each of the damper body 558 and the mounting structure thereof are the same as the damper body and the mounting structure of the head shell vibration damping scheme of the fourth embodiment, and are not described herein again.

Since the head shell vibration damping device 580 of the present technical solution includes two vibration damping bodies 558, the extension length of the head shell vibration damping device 580 in the axial direction of the output shaft 522 is greater than the extension length in the radial direction of the output shaft 522. The head shell vibration damping device 580 is longitudinally extended in the direction of the output shaft 522, thereby damping the head shell The device 580 has strong support for the first head shell 591 and the second head shell 595 in a certain range in the axial direction of the output shaft 522, and can significantly reduce the relative relationship between the first head shell 591 and the second head shell 595. The movement, thereby preventing the relative movement of the first head shell 591 and the second head shell 595 from offsetting the partial swing angle of the working head, reduces the working efficiency of the working head.

In the present embodiment, the head shell damper device 580 includes two damper bodies, each damper body including a damper portion in contact with the first head shell 591 and the second head shell 595. The length of the head shell damping device 580 in the axial direction of the output shaft 522 is greater than the length in the radial direction of the output shaft 522. It can be understood that the distance between the two most damped portions between the two farthest points in the axial direction of the output shaft 522 (L3) is greater than the distance between the two farthest points in the radial direction of the output shaft 522. That is to say, the span of the two damper portions in the axial direction along the output shaft 522 is larger than the span in the radial direction of the output shaft 522. Of course, the number of the vibration damping bodies may be N, wherein the distance between the N most damped portions in the axial direction along the output shaft 522 (L3) is greater than the radial direction along the output shaft 522. The distance between the two furthest points also means that the span of the N damping portions in the axial direction along the output shaft 522 is greater than the span in the radial direction along the output shaft 522.

Of course, the span in the axial direction of the output shaft 522 is the largest, and the damping effect is better, which will be described below with reference to FIGS. 19 and 20. In the case where the other conditions are the same, in FIG. 19, the two vibration damping bodies 558 of the head shell vibration damping device 580, each of the vibration damping bodies 588 includes the vibration damping in contact with the first head shell 591 and the second head shell 595. The portion between the two farthest points along the axial direction of the output shaft is H1; in FIG. 20, the two damper bodies 558 of the head shell damper device 580 are in contact with the first head shell 591 and the second head shell 595 The damper portion is H2 between the two farthest points in the axial direction of the output shaft, where H1>H2. In order to simplify the analysis process, it is assumed that one of the damper bodies 558 of the head damper device 580 (in the illustrated lower damper body 558 as an example) remains stationary during operation of the power tool, and the other damper body 558 ( The upper middle side vibration damper 558 is exemplified as being compressed, and the vibration damping body 558 is moved from a position indicated by a solid line to a position indicated by a broken line to generate a deformation amount a. When the same amount of deformation a is produced in Figs. 19 and 20, the angle of movement of the upper side damper body 558 with respect to the lower side damper body 558 in Fig. 19 is O1, and the upper side damper body 558 of Fig. 20 is reduced relative to the lower side. The angle at which the vibrating body 558 moves is O2, and since H1 > H2, it is apparent that O1 < O2. That is to say, the two damper bodies 558 having a relatively long distance in FIG. 19 make the first head shell 591 move at a smaller angle with respect to the second head shell 595, and the working efficiency is relatively higher; the distance in FIG. 20 is relatively close. The two damping bodies 558 cause the first head shell 591 to move at an angle relative to the second head shell 595, and the working efficiency is relatively poor. That is, the greater the distance between the two damper bodies 558 in the output shaft direction, the longer the extension length of the head shell damper device 580 in the output shaft direction, and the better the work efficiency.

Compared with a power tool that is not provided with a vibration damping body, the power tool of the present technical solution is provided with vibration damping Body, vibration damping effect is better. In the present technical solution, the head shell damping device includes two damper bodies. The power tool is more efficient than the head shell damper device including only one damper body.

The extension of the head shell damper 580 in the direction of the output shaft 522 refers to the distance between the two points on the two damper bodies 558 that are furthest from the output shaft 522. In other words, the damper portion of the head shell damper device 580 in the direction of the output shaft 522, that is, the damper portion of the head shell damper device 580 in contact with the first head shell 591 and the second head shell 595 is in the axial direction of the output shaft. The distance between the two farthest points. In FIG. 18, the distance between the two damper portions of the head damper device 580 at the two farthest points in the axial direction of the output shaft 522 is L3. The larger the extension length of the head shell damper device 580 in the direction of the output shaft 522, the better the space balance is, the better the balance between the vibration damping effect and the work efficiency.

Preferably, the first head case for accommodating the partial output shaft 522 has a maximum length L in the direction of the output shaft, and the two damper bodies are in contact with the first head case 591 and the second head case 595. The distance L3 between the two farthest points in the axial direction of the output shaft 522 of the damper portion is greater than or equal to 0.2 L and less than or equal to L. Preferably, the maximum length L3 of the damper portion of the head shell damper device 580 in contact with the first head shell 591 and the second head shell 595 in the output shaft direction is 0.4 L or more and 0.7 L or less. The working efficiency of the output shaft 522 can be minimized without minimizing the volume of the first head shell 591 and the second head shell 595.

Of course, the sum of the lengths of the two damper portions along the axial direction of the output shaft 522 is 0.2 L or more and L or less. It can also achieve the effect of good vibration reduction and high work efficiency. Of course, as understood by those skilled in the art, the number of the vibration damping bodies may be N, and the sum of the lengths of the N vibration damping portions along the axial direction of the output shaft 522 is 0.2L or more and L or less.

In the present technical solution, preferably, the extension length of the head shell vibration damping device 580 in the direction of the output shaft 522 is 15 mm or more and 75 mm or less. The working efficiency of the output shaft 522 can be minimized without minimizing the volume of the first head shell 591 and the second head shell 595. Preferably, the length of the head shell damper device 580 in the direction of the output shaft 522 is greater than or equal to 20 mm.

Here, the extension length of the head shell damper device 580 in the direction of the output shaft 522 can be understood as the sum of the lengths of the N damper portions along the axial direction of the output shaft is 15 mm or more. Or the distance between the two damper portions at the two farthest points in the axial direction of the output shaft is greater than or equal to 15 mm.

In this embodiment, the two damper bodies 558 are disposed in the axial direction of the output shaft 522, that is, the line connecting the center points of the two damper bodies 558 is a straight line segment, and the straight line segment is parallel to the output shaft 522. It is to be understood by those skilled in the art that the two damper bodies 558 can also be disposed offset along the axial direction of the output shaft 522, that is, the line connecting the center points of the two damper bodies 558 is a straight line segment, and the straight line segment is formed with the output shaft 522. Angle setting, As long as the extension length of the two damper bodies 558 in the direction of the output shaft 522 is greater than the extension length in the direction of the motor shaft, the operation efficiency of the output shaft 522 can be better prevented from being lowered.

Since the head shell damper device 580 of the present embodiment includes two damper bodies 558, only one damper body is provided in the head case of the fourth embodiment, the two damper bodies 558 and the first head case 591 and the second The extension length of the damper portion in contact with the head case 595 is also increased, and may be within the range of the extension length of the damper portion where the two damper bodies 558 are in contact with the first head case 591 and the second head case 595. The first head case 591 and the second head case 595 are supported to prevent a decrease in work efficiency.

In particular, the damper portion of the damper body 558 that is in contact with the first head shell 591 and the second head shell 595 has an extended length in the axial direction of the output shaft 522, which is not merely a simple addition of the damper body 558. The vibration damping effect is increased in quantity, and the head shell vibration damping device 580 has support for the first head shell 591 and the second head shell 595 in a certain range in the axial direction of the output shaft 522, which can significantly prevent the work efficiency from being lowered. .

As is conventional, the number of damping bodies is as high as possible. However, the applicant found that this is not the case. The damping effect is contradictory to the working efficiency of the output shaft. The optimal technical solution should take into account the vibration damping effect and working efficiency, so that the vibration and working efficiency can be accepted by the operator. Specifically, when there are more vibration damping bodies, the stronger the supporting effect of the vibration damping body on the inner casing and the outer casing, the worse the damping effect is, but the stronger the supporting effect of the vibration damping body on the inner casing and the outer casing is. The more difficult the movement of the inner casing relative to the outer casing, the smaller the relative movement angle of the inner casing and the outer casing, the smaller the angle of oscillation of the output shaft and the working head, and the higher the efficiency of the output shaft and the working head. . In the extreme case, when the damping body is sufficiently rigid to support the inner casing and the outer casing, the supporting effect is very strong, the inner casing and the outer casing do not move relative to each other, and the efficiency of the output shaft is hardly lost, but The damping effect is very poor. Vice versa, when the number of vibration damping bodies is smaller and the vibration damping body is softer, the damping effect is better, but at this time, the larger the inner casing and the outer casing are, the larger the swinging angle of the output shaft is to be oscillated. The lower the efficiency of the machine.

Therefore, in the present technical solution, the head shell vibration damping device 580 includes two vibration damping bodies 558. It will be appreciated by those skilled in the art that the headgear damping device 580 can include three to five damper bodies 558. This makes the vibration damping effect and working efficiency of the power tool acceptable to the operator, so that the balance between the vibration damping effect and the working efficiency can be achieved, and the volume of the power tool is not significantly increased, and the operation is more comfortable. Of course, those skilled in the art will appreciate that the head shell damping device may include more than five damping bodies.

In particular, when the output shaft of the oscillating power tool outputs a swing angle of 4 or more, the efficiency is greatly improved, but the vibration is also greatly increased. In the technical solution, the head shell is provided with two to five damper bodies, and the oscillating power tool without the damper body is relatively provided, and the vibration thereof has a large drop, but The damping body reduces the working efficiency. Although the efficiency of the oscillating power tool of the present application is relatively low, the efficiency of the oscillating power tool is not reduced, but the efficiency is reduced to a small extent. That is to say, the swinging power tool of the technical solution has good vibration damping effect and good efficiency, and obtains a better operating feel and high working efficiency.

Refer to the vibration value test values in the following table. Under the same conditions, the swinging power tool with the technical solution of the present invention has a vibration value relative to the undamped swing power tool, whether in the first test position or the second test position. Both fell by about 50%.

Referring to the work efficiency test values in the table below, we reflect the cutting efficiency by cutting the cutting time of the same workpiece. The value in the table below is the cutting time. We can clearly see that under the same conditions, the technical solution is adopted. Compared with the non-damping oscillating power tool, the oscillating power tool has a small increase in cutting time and a decrease in efficiency, but the efficiency is much smaller than the vibration value.

Therefore, the oscillating power tool adopting the technical scheme has good vibration damping effect and good efficiency, and obtains a better operation feeling and high work efficiency.

Referring back to FIG. 17, in the present embodiment, although the two vibration damping bodies 558 of the head shell vibration damping device 580 are centered in the axial direction of the output shaft 522, two of the two vibration damping bodies 558 are respectively abutted. The longitudinal extension directions Z1 and Z2 of the abutting member 553 are disposed at an angle, and Z1 and Z2 are disposed at an angle. The Z1 and Z2 are disposed in the same direction on a straight line, and the two abutting members 553 can be reduced on the output shaft 522. The space occupied in the axial direction, thereby reducing the volume of the power tool. Preferably, the two abutting members 553 abutting the two damper bodies 558 are integrally formed for convenient processing and installation, and the Z1 and Z2 are disposed at an angle, and the two integrally formed ones are arranged in parallel with the Z1 and the Z2. The abutment 553 occupies a smaller area and is more cost effective.

The motor casing damping scheme of the present embodiment is the same as that of the motor casing 300 of the power tool 300 of the fourth embodiment, and will not be described again.

Thus, in the power tool 500 of the present embodiment, on one side of the intermediate plane, the head shell vibration damping device 580 includes two damping bodies 558, and on the same side of the intermediate plane, the motor casing damping device 590 includes a subtraction The vibrating body 558 has three damper bodies 558 arranged in a triangle shape. It will be appreciated by those skilled in the art that on one side of the intermediate plane, the head damper 580 and the damper of the motor casing damper 590 form at least one triangle, and the damper portion of the head damper 580 constitutes a triangular shape. Just be there. Specifically, one side of the triangle includes two damper bodies 558 spaced apart from each other. It will be appreciated by those skilled in the art that one side of the triangle may include a longitudinally extending strip-shaped damper body.

It is also conceivable by those skilled in the art that a plurality of damper bodies are disposed on one side of the intermediate plane, and the plurality of damper bodies may constitute two or more different triangles. Of course, preferably, the damper portion of the head damper device forms one side of the triangle.

The triangle defines a plane, and the vibration transmitted from the inner casing 542 to the outer casing 544 is limited in this plane, so that the vibration transmitted from the inner casing 542 to the outer casing 544 can be minimized. Moreover, the damper portion of the head shell damper device constitutes one side of the triangle, which allows the damper portion of the head shell damper device to extend longitudinally, thereby avoiding a decrease in the efficiency of the power tool.

In this embodiment, the plane determined by the triangle is disposed at an angle to the center plane, and those skilled in the art may think that the plane determined by the triangle may be disposed in parallel with the center plane.

Returning to Fig. 17, in the present embodiment, on one side of the intermediate plane, the distance L6 between the damper body of the motor casing damping device 590 and the output shaft 522 is greater than or equal to 110 mm. Thereby, the distance between the vibration damping body of the motor casing vibration damping device 590 and the vibration damping body of the head casing vibration damping device 580 is large. The principle that the distance between the two damper bodies on the head shell in the direction of the output shaft 522 is higher is higher, and the damper body of the motor casing damper device 590 and the damper body of the head shell damper device 580 are The distance is large, so that the extension length of the damper body in the axial direction of the motor shaft is increased in the axial direction of the motor shaft, so that the damper body faces the inner casing 542 and the outer casing within a certain range in the axial direction of the motor shaft. The 544 has support to avoid a reduction in work efficiency.

It will be appreciated by those skilled in the art that on one side of the center plane, the motor casing damper 590 may also include N dampers (two to five) such that the motor casing damper 590 is axially along the output shaft 522. The extension length is greater than the extension length in the radial direction of the output shaft. Of course, those skilled in the art can think that the N damping bodies can also be a longitudinally extending strip-shaped damping body.

The first head case for accommodating the partial output shaft 522 has a maximum length L in the direction of the output shaft, and each of the N damper bodies includes a damper portion that is in contact with the first motor case and the second motor case. The distance between the two most damper portions in the axial direction along the output shaft is greater than or equal to 0.2 L and less than or equal to L. Preferably, the distance between the N dampers in the two farthest points along the axial direction of the output shaft is greater than or equal to 0.4L, less than or equal to 0.7L.

Of course, the sum of the lengths of the N damping portions along the axial direction of the output shaft is greater than or equal to 0.2 L and less than or equal to L. Preferably, the sum of the lengths of the N damper portions in the axial direction along the output shaft is 0.4 L or more and 0.7 L or less.

The maximum length of the damper portion of the motor case damper device 590 in contact with the first motor case 593 and the second motor case 597 in the output shaft direction is 15 mm or more and 75 mm or less. That is, the sum of the lengths of the N damper portions along the axial direction of the output shaft or the distance between the N most damper portions at the two farthest points in the axial direction of the output shaft is 15 mm or more and 75 mm or less. Preferably, it is 20 mm or more.

On one side of the intermediate plane, the motor casing damping device comprises two damping bodies. On the same side of the intermediate plane, the head casing damping device comprises a damping body, and the three damping bodies are arranged in a triangle. It will be appreciated by those skilled in the art that on one side of the intermediate plane, the head damper and the damper of the motor casing damper form at least one triangle, and the damper of the motor casing damper constitutes one side of the triangle.

The triangle defines a plane that is disposed at an angle to the center plane. It will be appreciated by those skilled in the art that the plane defined by the triangle may be disposed parallel to the center plane.

In this embodiment, the vibration damping body 558 of the head shell vibration damping device 580 is disposed outside the outer contour of the outer casing 544, and the vibration damping body 558 of the motor casing vibration damping device 590 is disposed in the inner contour of the inner casing 542, that is, the setting The inside of the inner casing 542 accommodates a space. It will be appreciated by those skilled in the art that the locations of the damper bodies of Embodiments 1, 2, 3, and 5 are equally applicable to this embodiment. Moreover, whether it is the head shell vibration damping device 580 or the motor casing vibration damping device 590, the vibration damping body 558 can be directly disposed in the gap between the inner casing 542 and the outer casing 544 and directly connected to the inner casing 542 and the outer casing 544. Abut.

[Seventh embodiment]

Figure 21 shows a power tool 600 provided by a seventh embodiment of the present invention.

The difference between the power tool 600 of the present embodiment and the power tool 500 of the sixth embodiment includes: in the embodiment, on one side of the intermediate plane, the head shell vibration damping device includes only one vibration damping body 658, and the vibration damping body 658 It is elongated and long.

In the foregoing technical solution, the outer contour of the longitudinal section of the vibration damping body is circular, and in order to achieve a better vibration damping effect, the head shell vibration damping device of the sixth embodiment improves the vibration of the entire head shell by providing two vibration damping bodies. The extension length of the device and the extension length of the damper portion of the entire head shell damping device in contact with the first head shell and the second head shell ultimately improve the vibration damping effect. In the present embodiment, since the vibration damping body 658 itself has a longitudinal strip shape and a relatively long extension length, the head shell vibration damping device includes a longitudinal strip-shaped vibration damping body 658 on one side of the intermediate plane. Yes, of course, under the conditions of space, the head shell damping device includes two Up to five damper bodies in the form of long strips are also available.

Preferably, in the embodiment, the length of the longitudinal strip-shaped damper 658 in the axial direction of the output shaft 622 is greater than the length in the radial direction of the output shaft. Preferably, the maximum length L7 of the damper portion of the longitudinal strip-shaped damper body 658 in contact with the first head shell and the second head shell in the output shaft direction is 15 mm or more and 75 mm or less. Preferably, the first head shell for accommodating the partial output shaft 622 has a maximum length L in the direction of the output shaft, and the longitudinal strip-shaped damper body 658 is damped in contact with the first head shell and the second head shell. The maximum length L7 of the portion along the output shaft direction is greater than or equal to 0.2L and less than or equal to L. Preferably, the maximum length L7 is greater than or equal to 0.4 L and less than or equal to 0.7 L.

[Eighth Embodiment]

Fig. 22 shows a power tool according to an eighth embodiment of the present invention.

As shown in FIG. 22, the power tool includes a first housing 842 and a second housing 844 that are spaced apart from each other, and a vibration damping body 858 is disposed between the first housing 842 and the second housing 844. In this embodiment, the first housing 842 and the second housing 844 are disposed to intersect. Specifically, the first housing 842 is substantially stepped, and includes a first portion 8421 having a certain height difference, a second portion 8422, and a third portion 8423 connecting the first portion 8421 and the second portion 8422. The third portion 8423 is provided on the third portion 8423. The through hole 864, the second housing 844 extends substantially longitudinally and through the through hole 8423, and the second housing 844 is disposed with the vibration damping body 858 between the first portion 8421 and the second portion 8422 of the first housing 842.

In summary, in the present invention, the housing is disposed to include a first housing and a second housing spaced apart from the first housing by providing a reduction between the first housing and the second housing The vibrating body prevents vibration from being transmitted directly from the first housing to the second housing.

The specific solution may be various, for example, the outer diameter of the first housing is smaller than the inner diameter of the second housing, and the vibration damping body is disposed between the outer contour of the first housing and the inner contour of the second housing. .

For example, the first housing may have a first side facing away from the second housing, the first side is provided with a support member, and the second housing is provided with a connecting unit, and the connecting unit has a surface facing the first side. The connecting member, the damping body is disposed between the support member and the abutting member. The solution that the connecting unit has the abutting member facing the first side is mainly that the connecting unit extends to the first side of the first housing. Specifically, the first housing is provided with a through hole, and the connecting unit extends through the through hole. The first side; or the first housing has an end surface, and the connecting unit extends around the end surface to the first side.

For example, the first housing and the second housing may be disposed to intersect with each other, and the vibration damping body is disposed between the first housing and the second housing that are disposed at an intersection. "The first housing and the second housing intersect" may be: a support member is disposed on a side of the first housing facing away from the second housing, and a connecting unit disposed on the second housing passes through the first housing The through hole extends to a side of the first housing facing away from the second housing, and the damping body is disposed between the support member and the connecting unit, and if the supporting member is regarded as a part of the first housing, the connecting unit is to be connected As a part of the second casing, the first casing and the second casing are disposed at the same time while being spaced apart from each other; the "first casing and the second casing intersecting" may also be the solution of the foregoing eighth embodiment ,No longer.

The power tool of the present embodiment is exemplified by a swinging power tool. Those skilled in the art can think of other power tools, such as a rotary power tool (such as an electric drill, an angle grinder, an electric circular saw, etc.) that the motor drives the output shaft to rotate through a transmission mechanism. The reciprocating power tool (such as a reciprocating saw, a jig saw, etc.) that drives the output shaft to reciprocate through the transmission mechanism can adopt the vibration damping scheme of the present invention. A person skilled in the art may think that a single vibration damping scheme among the different technical solutions described above may be used on one power tool, and one power tool may also use a combination of two or more of the different vibration damping solutions described above.

It will be appreciated by those skilled in the art that the present invention may have other implementations, but as long as the technical essence employed is the same or similar to the present invention, or any changes and substitutions made based on the present invention are in the present invention. Within the scope of protection.

Claims

A power tool includes a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, wherein the housing includes a first head shell and a second head shell The first head shell is configured to receive a portion of the output shaft, a maximum length of the first head shell along an axial direction of the output shaft is L, and a plane defining an axis of the output shaft is an intermediate plane. N dampers are disposed between the first head shell and the second head shell and on at least one side of the intermediate plane, each damper body including the first head shell and the first The damper portion in contact with the two head shells, wherein the sum of the lengths of the N damper portions along the axial direction of the output shaft is greater than or equal to 0.2 L and less than or equal to L.
The power tool according to claim 1, wherein a sum of lengths of the N damper portions along an axial direction of the output shaft is 0.4 L or more and 0.7 L or less.
The power tool according to claim 1, wherein two damper bodies are disposed between the first head shell and the second head shell and on at least one side of the intermediate plane, respectively The longitudinal extension directions Z1 and Z2 of the two abutting members abutting the two damper bodies are disposed at an angle.
The power tool according to claim 1, wherein said housing further comprises a first motor housing fixedly coupled to said first head housing, and a second motor housing fixedly coupled to said second head housing, The first motor casing is for mounting the motor, and a motor casing damping device is disposed between the first motor casing and the second motor casing.
A power tool according to claim 4, wherein said motor casing damping means and said N damping bodies form at least one triangle on said one of said intermediate planes, said N damping portions Forming one side of the triangle.
A power tool according to claim 5, wherein one side of said triangle includes two damper bodies spaced apart.
A power tool according to claim 5, wherein one side of said triangle includes a longitudinally extending strip-shaped damper.
The power tool according to claim 5, wherein a plane passing through an axis of said output shaft and an axis of said motor is defined, and a plane in which said triangle is located is disposed at an angle or angle to said center plane.
A power tool according to claim 1 wherein said first head shell has a first side facing away from said second head shell, said first side being provided with a support member, said second head The housing is provided with a connecting unit having an abutting member facing the first side, and the N damping bodies are disposed between the supporting member and the abutting member.
The power tool according to claim 1, wherein said second head case has a first side facing away from said first head case, said first side being provided with a support member, said first head The housing is provided with a connecting unit having an abutting member facing the first side, and the N damping bodies are disposed between the supporting member and the abutting member.
A power tool includes a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, wherein the housing includes a first head shell and a second head shell The first head shell is configured to receive a portion of the output shaft, a plane defining an axis of the output shaft is an intermediate plane, and the intermediate plane between the first head shell and the second head shell is at the intermediate plane N at least one side is provided with N damper bodies, each damper body includes a damper portion in contact with the first head shell and the second head shell, and the N damper portions are along The distance between the two furthest points in the axial direction of the output shaft is greater than the distance between the two farthest points in the radial direction of the output shaft.
A power tool includes a housing, a motor housed in the housing, an output shaft driven by the motor and used to mount a working head, wherein the housing includes a first head shell and a second head shell The first head shell is configured to receive a portion of the output shaft, a maximum length of the first head shell along an axial direction of the output shaft is L, and a plane defining an axis of the output shaft is an intermediate plane. N dampers are disposed between the first head shell and the second head shell and on at least one side of the intermediate plane, each damper body including the first head shell and the first The damper portion in contact with the two head shells, wherein the distance between the two farthest points in the axial direction of the output shaft is greater than or equal to 0.2L and less than or equal to L.
A power tool includes a housing, a motor housed in the housing, and an output shaft driven by the motor for mounting a working head, the housing including a first housing and a gap with the first housing a second housing that is spaced apart, wherein the first housing has a first side facing away from the second housing, and the first side is provided with a support member, the second housing A connecting unit is disposed on the connecting unit, and the connecting unit has an abutting member facing the first side, and a vibration reducing body is disposed between the supporting member and the abutting member.
A power tool according to claim 13 wherein said first housing includes a motor housing for mounting said motor and/or a head housing for partially receiving said output shaft, said second housing The body is disposed outside the first housing.
A power tool according to claim 13 wherein said second housing includes a motor housing for mounting said motor and/or a head housing for partially receiving said output shaft, said first housing The body is disposed outside the second housing.
A power tool according to claim 13, wherein said connecting unit includes a connecting member connected to said second housing, said abutting member being coupled to said connecting member, said extension of said abutting member The extending direction is disposed in the same direction or at an angle to the extending direction of the connecting member.
The power tool according to claim 13, wherein said first casing is provided with a through hole, and said connecting unit passes through said through hole to position said abutting member on said first side.
The power tool according to claim 13, wherein the abutting member is provided with an abutting surface, the supporting member is provided with a contact surface, the damper body and the abutting surface and the The contact surface abuts.
A power tool according to claim 13 wherein an eccentric transmission mechanism is provided between said motor and said output shaft, said output shaft being oscillated about an axis of said output shaft driven by a motor, said operation The head oscillates with the output shaft to form an oscillating plane, the main force direction of the damper body being parallel to the oscillating plane and perpendicular to the axis of the motor.
A power tool according to claim 13 wherein said damper body maintains a predetermined minimum spacing between said first housing and said second housing.