WO2019233380A1

WO2019233380A1 - Power tool

Info

Publication number: WO2019233380A1
Application number: PCT/CN2019/089844
Authority: WO
Inventors: 凌齐; 王荣; 李阳
Original assignee: 南京德朔实业有限公司
Priority date: 2018-06-05
Filing date: 2019-06-03
Publication date: 2019-12-12

Abstract

Disclosed is a power tool (100), comprising: a power assembly (12) comprising a motor (121), the motor (121) comprising a motor shaft (121a) rotating about a motor axis; an output assembly (14) comprising an output shaft (141); a transmission assembly (13); a first casing (111); and a second casing (112), wherein the power tool (100) is provided with a first vibration isolation plane (171) and a second vibration isolation plane (172), a first vibration isolation block (173) is provided on the first vibration isolation plane (171), and a second vibration isolation block (174) is provided on the second vibration isolation plane (172); the entirety composed of the first vibration isolation block (173) and the second vibration isolation block (174) has at least a separation portion (17a) provided between the first casing (111) and the second casing (112), and the second casing (112) is separated from the first casing (111) at the separation portion (17a); and the first vibration isolation block (173) and the second vibration isolation block (174) are separated from each other.

Description

Power tools

This disclosure claims the priority of the Chinese patent application filed on June 05, 2018 with the application number 201810566644.5 and the Chinese patent application filed on November 29, 2018 with the application number 201811442212.X. All of the above applications The contents are incorporated in this disclosure by reference.

Technical field

This article relates to a power tool, such as a swing type tool.

Background technique

Power tools such as electric hammers, reciprocating saws, and swing tools generate vibration during the work process, which will affect the machining effect of the workpiece being processed. This type of hand-held power tools is held by users when they hold them for work. The vibration generated by the tool itself will be transmitted to the user through the human hand, so that the user cannot hold the tool stably, and it will also make the user feel tired after working for a period of time. Especially for swinging tools, it includes an eccentric transmission assembly for swinging, so that swinging tools have a large vibration after turning on. On the one hand, this makes it impossible for users to hold the swinging tools stably, which affects the The machining effect of the sawed workpiece, on the other hand, the user will feel very tired after using it for a period of time, which affects the work efficiency.

Summary of the Invention

In order to solve the shortcomings of the existing technology, this paper provides a power tool with good damping effect.

This article uses the following technical solutions:

A power tool includes: a power component including a motor, the motor including a motor shaft rotatable about a motor axis; an output component including an output shaft configured to output power; a transmission component configured to be implemented between the power component and the output component Power transmission; the first housing can support at least the power component, the transmission component and the output component; the second housing surrounds at least part of the first housing, and the second housing is also formed with a structure for holding by the user A handle part; wherein, the power tool is provided with a first vibration isolation plane and a second vibration isolation plane, a first vibration isolation block is provided on the first vibration isolation plane, and a second vibration isolation block is provided on the second vibration isolation plane; The whole of the vibration isolating block and the second vibration isolating block has at least a space portion provided between the first case and the second case, and the second case is spaced apart from the first case at the space portion; the first The vibration isolation block and the second vibration isolation block are separated from each other.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view of a power tool when a working accessory is installed in a first embodiment of the present invention; FIG.

2 is a cross-sectional view of the power tool in FIG. 1 when a working accessory is installed;

3 is an enlarged view of a part of the structure in FIG. 2;

4 is a perspective view of the power tool in FIG. 1 when the left case is removed;

5 is an exploded view of the power tool in FIG. 1 after the battery pack is removed;

FIG. 6 is a plan view of a vibrating body in the power tool in FIG. 1.

Detailed ways

As shown in FIG. 1, a power tool 100 is proposed herein. The power tool 100 may be an electric tool using electric energy as an energy source. The power tool 100 may be a hand-held power tool. More specifically, the power tool 100 may For swinging tools. As shown in FIG. 1, in a specific embodiment, the power tool 100 may be a swing type tool, and the swing type tool may be installed with different working accessories 200 such as triangular sand, shovel, metal saw blade, woodworking saw blade, emery Saw blades and the like, through these different working attachments 200, the power tool 100 can realize the functions of sawing, sanding, filing, shovel cutting and the like. Of course, it can be understood that the power tool 100 can also be other power tools that generate relatively large vibrations during the work process, such as electric drills, electric hammers, reciprocating saws, sanders, etc., of course, as an optional implementation For example, the power tool 100 of this embodiment includes a main body and a working head provided at the front end. The main source of vibration is generated by the working head, and the user is holding the main body. Therefore, such a power tool 100 uses the following disclosed herein. The substance will produce better vibration reduction effects.

The specific structure and working principle of the power tool 100 are described in detail below.

Referring to FIGS. 1 and 2, the power tool 100 is a hand-held power tool. In this embodiment, the power tool 100 is a hand-held swing-type tool. Specifically, the power tool 100 includes a housing component 11, a power component 12, a transmission component, an output component 14, a clamping device 15, and an energy source. The housing assembly 11 forms the outer shape of the power tool 100. The power assembly 12 includes a prime mover configured to provide a driving force, and the prime mover is disposed inside the housing assembly 11. In this embodiment, for a swing type tool, the transmission component is an eccentric transmission component 13 capable of providing an oscillating motion. The clamping device 15 is configured to mount the work attachment 200 to the power tool 100, and the clamping device 15 can also be considered as a part of the output assembly 14. The energy source is the battery pack 16 in this embodiment. In other embodiments, the energy source may also be a power line provided with external AC power. Therefore, in this embodiment, the power tool 100 is an electric tool.

The housing assembly 11 includes a first housing 111 and a second housing 112. The first housing 111 is at least partially disposed in the second housing 112, and the second housing 112 is formed with a handle portion 112a for holding by a user. . The second casing 112 extends at least partially along the direction of the first straight line 101. The first housing 111 is formed with a receiving cavity 111 a provided to receive and support the power assembly 12, the eccentric transmission assembly 13, and the output assembly 14. The first casing 111 further specifically includes a head casing 111b and a power casing 111c, wherein the head casing 111b is configured to at least partially cover the output component 14 and the power casing 111c is configured to at least partially cover the power component 12 . In fact, the part of the housing assembly 11 provided in the second housing 112 can also be considered as the first housing 111, and at least one between the first housing 111 and the second housing 112 is perpendicular to the first housing 111. A gap 112 b is formed in the direction of the line 101. The second casing 112 may specifically include a left casing 112c and a right casing 112d, and the left casing 112c and the right casing 112d may be arranged substantially symmetrically about a mid-plane 102, so that the left casing 112c and the right casing 112d are arranged symmetrically. The formed handle portion 112 a is also disposed substantially symmetrically with respect to the mid-plane 102, and the first housing 111 may also be substantially symmetrical with respect to the mid-plane 102. The power component 12, the eccentric transmission component 13, the output component 14, and the clamping device 15 provided in the first housing 111 or the second housing 112 are also arranged substantially symmetrically with respect to the mid-plane 102.

The power component 12 includes a prime mover configured to provide power to the output component 14. The prime mover may specifically be a motor 121. The motor 121 includes a motor shaft 121a. The motor 121 is at least partially disposed in the power housing 111c. The motor shaft 121a may be Projecting out of the power casing 111c, the motor 121 can still be considered to be disposed in the power casing 111c, and the power casing 111c can also be considered to be a part of the motor 121. That is to say, the power casing 111c can be considered as a casing provided outside the motor 121 and configured to wrap the motor 121, and the power casing 111 can also be considered as a casing of the motor 121 itself. As shown in FIGS. 2 to 5, in some embodiments, the power casing 111 c includes a motor casing portion 111 d and a wind guide portion 111 e. In the direction along the first straight line 101, a wind guide portion 111e is provided between the motor case portion 111d and the head case 111b, and the wind guide portion 111e connects the motor case portion 111d and the head case 111b, so that the motor The first casing 111 is formed as a whole by the casing portion 111d, the air guiding portion 111e, and the head casing 111b. In fact, any casing portion that can directly receive the vibration transmitted from the eccentric transmission assembly 13 can be considered as the first casing 111. A housing 111; or the housing portion that receives the vibration transmitted by the output component may be considered as the first housing 111; or, the housing of the working head portion may also be considered as the first housing 111. In summary, the casing that can receive the vibration source provided in the power tool 100 to generate vibration can be considered as the first casing 111. The first casing 111 supports the vibration source and is in contact with the vibration source. At least part of the casing of the first casing 111 is considered to be the second casing 112.

The motor shaft 121a can rotate relative to the housing assembly 11 with the motor axis 103 as an axis. In this embodiment, the motor axis 103 and the first straight line 101 can be considered to be coincident with each other. An eccentric portion 131 is formed or connected to the end of the motor shaft 121 a near the output component 14 in the extending direction. The eccentric portion 131 can be considered as a part of the eccentric transmission component 13. 104 and the motor axis 103 are parallel to each other, and the distance between the central axis 104 and the motor axis 103 can be an eccentricity. It can be understood that when the eccentricity is large, the vibration generated by the power tool 100 will also increase. The eccentric transmission assembly 13 further includes a bearing 132 and a swing lever 133. The output assembly 14 includes an output member configured to output power, and the output member is specifically an output shaft 141 that can swing about the output axis 105 as an axis. The bearing 132 is mounted on the eccentric portion 131. When the eccentric portion 131 rotates with the motor shaft 121a, the bearing 132 will also rotate with the motor axis 103 as the axis driven by the eccentric portion 131. In this way, the bearing 132 is perpendicular to the midplane The left-right direction of 102 has a partial motion of left-right reciprocating motion. The swing lever 133 includes a mounting portion 133a and a swing claw 133b. The mounting portion 133a is fixedly connected to the output shaft 141. The number of swing claws 133b is two. Two swing claws 133b are provided on the left and right sides of the bearing 132, and two swing claws 133b. It is also provided on the left and right sides of the center plane 102. In this way, when the bearing 132 reciprocates, the two swing claws 133b will be reciprocated in the left-right direction. The mounting portion 133a and the output shaft 141 form a fixed connection. The entirety of the mounting portion 133a and the output shaft 141 can swing back and forth within a range of swing angles with the output axis 105 as the axis. The lever 133 will swing around the output axis 105, so that the swing lever 133 drives the output shaft 141 to swing within a range of a swing angle. It can be seen that the power component 12, the eccentric transmission component 13 and the output component 14 are sources of vibration of the power tool 100. In this article, the power component 12, the eccentric transmission component 13, and the output component 14 are basically disposed in the first casing 111. Therefore, the vibration generated by the power component 12 will first be transmitted to the first casing 111, and the casing The assembly 11 includes two independent first and

second cases

111 and 112, and a gap 112b is provided between the second and

second cases

112 and 111, so that the vibration transmitted to the first case 111 is transmitted. It will be attenuated to a certain extent before being transmitted to the second casing 112, and the handle portion 112a is formed by the second casing 112, so that the vibration transmitted from the second casing 112 to the user's hand will also be transmitted to a certain extent. Weakened, thereby improving the shock absorption effect of the whole machine. Among them, the bearing 132 strikes the swing claw 133b reciprocatingly in the left-right direction, and the output shaft 141 also reciprocates in a plane perpendicular to the mid-plane 102, so it can be understood that, in this embodiment, the working process of the power tool 100 The exciting force direction F of the exciting force of the vibration generated by the intermediate vibration source is substantially along the direction perpendicular to the mid-plane 102.

In fact, in this article, especially for the swing-type tools in this embodiment, the vibration generated during the swing of the swing lever 133 is very much compared with other drill-type and circular-saw-type tools. Large, but the first housing 111 and the second housing 112 are not provided with a very good vibration damping effect only by setting intervals. In other words, under the increasing demand of the market, on the one hand, the emergence of low-vibration power tools 100 is required to meet the user's requirements for low-vibration products, and on the other hand, the emergence of high-efficiency power tools 100 is also required. For the power tool 100, the increase in efficiency will inevitably increase the vibration of the power tool 100. Therefore, it is necessary to design a vibration damping structure with better damping effect for this type of high cutting efficiency power tool 100. Especially for the swinging tool in this embodiment, on the one hand, we hope to increase the cutting efficiency by increasing the swinging angle, and on the other hand, when the swinging angle is increased, the swinging tool will vibrate more severely. Therefore, in this paper, a vibration reduction system 17 based on the structure of the above-mentioned case assembly 11 by the first case 111 and the second case 112 is also proposed. It should be noted that the first casing 111 and the second casing 112 form a detachable connection, and the motor 121 may also be at least partially disposed in the second casing. In fact, the vibration damping system 17 herein is also applicable to other power tools having only one housing.

In this embodiment, especially for the swing tool of this embodiment, its vibration is mainly caused by the eccentric portion 131 driving the bearing 132 to rotate and the rotating bearing 132 reciprocatingly hits the swing claw 133b, so the eccentricity can be eccentric The entirety of the portion 131, the bearing 132, and the swing claw 133b is considered to be a vibration source 134. The power module 12 connected to the eccentric portion 131, the output module 14 fixedly connected to the swing claw 133b, and the clamping device connected to the output module 14. 15 and the first housing 111 provided to install the motor 121, the eccentric transmission assembly 13, the output assembly 14, and the clamping device 15 all directly receive the vibration generated by the vibration source 134 through a solid structure connection. The component that the source 134 is fixedly connected through the solid structure and directly receives the vibration generated by the vibration source 134 can be considered as the vibration body 10. Alternatively, in addition to the eccentric transmission assembly 13 that generates the main vibration, the work attachment 200 that swings back and forth and processes the workpiece, the output assembly 14 and the clamping device 15 that rotate around the output axis 105, and a high-speed rotation Structures such as the motor 121 that also generate vibration but are not the main source of vibration are considered to be vibration bodies. That is to say, all the vibration sources 134 that generate vibration in the power tool 100 can be regarded as the vibration body 10, and the vibration sources 134 that generate large vibration in the power tool 100 can be regarded as the vibration body 10, and the vibration source 134 is The structure that is fixedly connected through the solid structure and directly receives the vibration generated by the vibration source 134 can also be selectively considered as a part of the vibration body 10 according to the specific situation. A gap 112b is provided between the second casing 112 and the first casing 111, and is not directly connected or closely contacted with the vibration body 10 through a solid structure. Therefore, the second casing 112 may be considered as a non-vibration body 20 The battery pack 16 connected to the second case 112 should also be considered as the non-vibrating body 20. It can be understood that the screws, buckles, or other positioning structures and connection structures between the first casing 111 and the second casing 112 can be ignored, and these are not considered as the main solid structures for transmitting vibration.

In this embodiment, in order to reduce the vibration transmitted from the vibrating body 10 to the non-vibrating body 20, a vibration reduction system 17 is provided between the vibrating body 10 and the non-vibrating body 20, thereby acting as a vibration isolation. Considering that for the swing-type multifunctional tool, the power tool 100 may be installed with different work accessories 200 during use, and the weight, size and specifications of the work accessory 200 are changed when the structure of the power tool 100 is involved, Therefore, the work attachment 200 can be regarded as not part of the vibration body 10. On the one hand, in terms of weight, the influence of the work attachment 200 on the vibration body 10 can be ignored, and the movement direction of the work attachment 200 when it swings with the output shaft 141 is consistent with the output shaft 141. Therefore, the work attachment 200 can be regarded as not It belongs to a part of the vibration body 10, so that the user can set the structure and position of the vibration reduction system 17 and the like. On the other hand, the size of the work attachment 200 is large, and it is not desirable to make the position and structure of the vibration damping system 17 an uncertain factor because of the size of the work attachment 200. Therefore, from this aspect, the main body of the vibration is included. 10 can also be considered as not including work attachment 200. That is to say, the power tool 100 herein can be regarded as a bare metal state when the work accessory 200 is not installed, so when the vibration main body 10 is identified, the power tool 100 in a bare metal state may prevail. More specifically, in this embodiment, the vibration body 10 may include: a power component 12, an eccentric transmission component 13, an output component 14, a clamping device 15, and a first housing 111. For other types of power tools 100, In other words, the vibration body 10 may also be considered as a driving body provided to drive the work accessory 200 and cause the work accessory 200 to implement a tool function. In order to introduce the scheme, and considering that for the swing type tool, the power tool 100 may be installed with different work attachments 200 during use, and when the size of the power tool 100 is involved, the size and specifications of the work attachment 200 are changed Therefore, it can be considered that the work attachment 200 does not belong to the vibration body 10. But in fact, when the designer designs, because the work attachment 200 is in direct contact with the workpiece during the work process, the vibration it generates will be relatively large. Therefore, when designing the specific structure, position and parameters of the vibration reduction system 17, The existence of the work attachment 200 may be considered. Just after the vibration damping system 17 is designed in consideration of the existence of the working attachment 200, in order to allow the public to clearly implement this article with the exclusion of some uncertain factors, the following dimensions and structures can be considered as power tools 100 is measured without work accessory 200 installed.

The vibration reduction system 17 is at least partially disposed between the first casing 111 and the second casing 112. The first casing 111 serves as a supporting structure for the internal parts of the vibration body 10. The vibration reduction of the vibration reduction system 17 can reduce transmission The support structure to the non-vibrating body 20 is the vibration of the second casing 112. In this way, when the user holds the handle portion 112 a formed by the second housing 112, the user's hand can feel that the vibration generated by the power tool 100 is relatively weak, so that the user can hold the power tool 100 more stably to improve the power tool 100. The machining effect on the workpiece can also make the user not feel fatigue after using the power tool 100 for a long time.

In this embodiment, the eccentric portion 131 drives the bearing 132 to strike the swing claw 133b in the left-right direction, and the output shaft 141 also basically swings in the left-right direction. Therefore, the eccentric transmission component 13 can be understood as a vibration source, and the output component 14 also It can be understood as a vibration source, or the whole formed by them can be understood as a vibration source. Therefore, in this embodiment, the direction F of the excitation force of the vibration generated by the vibration source and the motor axis 103 are perpendicular to each other. Therefore, in this embodiment, the excitation force direction F of the vibration generated by the vibration source can also be considered as the excitation force direction F of the vibration generated by the vibration body 10. The direction of excitation force F of the vibration generated by the vibration body 10 described below can be understood as the direction of excitation force F of the vibration generated by the vibration source.

In this embodiment, the exciting force direction F of the exciting force generated by the vibrating body 10 and the mid-partition plane 102 are perpendicular to each other, so the vibration damping system 17 can be set in a direction F that is parallel to the exciting force. In addition, vibration isolation is performed in a plane perpendicular to the mid-partition plane 102, so that the vibration transmitted from the vibration body 10 to the non-vibration body 20 along the excitation force direction F of the excitation force can be effectively reduced. That is, the vibration damping system 17 is disposed at least partially between the first casing 111 and the second casing 112 in the direction F of the exciting force, or the vibration damping system 17 separates the first casing 111 and the second casing 111 At least a portion of the housing 112 is spaced apart in the direction F of the excitation force.

In some embodiments, the vibration body 10 is provided with at least two first and second planes perpendicular to the motor axis 103 of the motor shaft 121a, and the vibration damping system 17 includes: at least one first spacer disposed on the first plane The vibration block 173 and at least one second vibration isolation block 174 disposed on the second plane. Here, the first plane may be defined as a first vibration isolation plane 171 and the second plane may be defined as a second vibration isolation plane 172. In the present embodiment, the entirety of the first vibration isolating block 173 and the second vibration isolating block 174 has at least a space portion 17 a provided between the first casing 111 and the second casing 112, and the second casing 112 The space is separated from the first case 111 at the space portion 17a, and the first vibration isolation block 173 and the second vibration isolation block 174 are also separated from each other. In some embodiments, the first vibration isolation block 173 is disposed between the first casing 111 and the second casing 112, and the second vibration isolation block 174 is disposed between the first casing 111 and the second casing 112. The second casing 112 is spaced from the first casing 111 at the first vibration isolation block 173, and the second casing 112 is also spaced from the first casing 111 at the second vibration isolation block 174. The separation of the first vibration isolation block 173 and the second vibration isolation block 174 from each other can be understood as the first vibration isolation block 173 and the second vibration isolation block 174 are not integrally formed, and they are separated by a certain distance. In this way, by providing the first vibration isolation block 173 and the second vibration isolation block 174 spaced apart in the power tool 100, the vibration reduction effect of the vibration reduction system 17 can be improved, thereby improving the work efficiency of the user. The first vibration isolation block 173 and the second vibration isolation block 174 are spaced apart from each other in a direction perpendicular to the first vibration isolation plane 171.

The first vibration isolation plane 171 and the second vibration isolation plane 172 are also perpendicular to the mid-part plane 102 of the vibration body 10. The first vibration isolation plane 171 and the second vibration isolation plane 172 are also related to the excitation force generated by the vibration body 10. The excitation force directions F are parallel to each other. The first vibration isolation plane 171 and the second vibration isolation plane 172 are also mutually flat with the output axis 105 of the output shaft 141. The output shaft 141 swings in a plane perpendicular to the output axis 105. Therefore, the first vibration isolation plane 171 and the second vibration isolation plane 172 are also perpendicular to the plane where the output shaft 141 swings, and the first vibration isolation plane 171 and the second vibration isolation plane 172 are also perpendicular to the first straight line 101. In this way, the first vibration isolation block 173 on the first vibration isolation plane 171 and the second vibration isolation block 174 on the second vibration isolation plane 172 can reduce the vibration transmitted from the vibration body 10 to the non-vibration body 20. In this embodiment, the direction along the first straight line 101 and the direction from the first vibration isolation plane 171 toward the second vibration isolation plane 172 is also defined as the direction along the first straight line 101 and from the second vibration isolation plane 172. The direction toward the first vibration isolation plane 171 is forward. In other words, we hope that the vibration damping system 17 can reduce the vibration transmitted by the vibrating body 10 to the non-vibrating body 20 along the exciting force direction F. Therefore, we can also set it like this, first define a partition plane perpendicular to the exciting force direction F The vibration body 10 is provided with at least two first vibration isolation planes 172 and a second vibration isolation plane 172 that are perpendicular to the isolation plane, and the first vibration isolation planes 171 and the first vibration isolation blocks on the second vibration isolation plane 172. 173 and the second vibration isolating block 174 can separate the path of vibration transmission in the direction of the exciting force direction F and the direction that obliquely intersects the exciting force direction F, so as to absorb the vibration generated by the vibration body 10 and further reduce The vibration of the small-vibration body 10 is transmitted to the non-vibration body 20 in the excitation force direction F.

As shown in FIGS. 4 to 6, in this embodiment, the length of the vibration body 10 in the direction along the motor axis 103 is L, that is, the length of the vibration body 10 in the direction in which the handle portion 112 a extends is L, or It is said that the length of the vibration body 10 in the direction perpendicular to the first vibration isolation plane 171 is L. Further, considering that the motor 121, the eccentric transmission assembly 13, the output assembly 14, and the clamping device 15 in the vibration body 10 are basically disposed in the first housing 111, therefore, in this embodiment, the length L can also be understood Is the length of the first casing 111. The vibration body 10 also has a center of gravity G. In this embodiment, in the direction along the motor axis 103, the distance between the first vibration isolation plane 171 and the center of gravity G is L1, that is, the first vibration isolation plane 171 and The distance between the center of gravity G in the direction of the motor axis 103 is L1, or the size of the first vibration isolation plane 171 and the center of gravity G in a direction perpendicular to the first vibration isolation plane 171 is L1. In this embodiment, the ratio of the distance L1 between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 to the length L of the vibration body 10 in the direction of the motor axis 103 is greater than or equal to 0 and less than or equal to 0.3, that is, That is, the distance L1 between the first vibration isolation plane 171 and the center of gravity G in a direction perpendicular to the first vibration isolation plane 171 and the length L of the vibration body 10 in a direction perpendicular to the first vibration isolation plane 171 The ratio of is greater than or equal to 0 and less than or equal to 0.3. Among them, the ratio of the distance L1 between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 to the length L of the vibration body 10 in the direction of the motor axis 103 is greater than or equal to 0 and less than or equal to 0.3, which refers to the first vibration isolation. The plane 171 passes through the center of gravity G or is provided on the front side or the rear side of the center of gravity at a distance of 0.3 L from the center of gravity G. In the direction of the motor axis 103, the distance between the first vibration isolation plane 171 and the second vibration isolation plane 172 is L2, that is, the distance between the first vibration isolation plane 171 and the second vibration isolation plane 172 is along the motor. The distance in the direction of the axis 103 is L2, or in other words, the distance between the first vibration isolation plane 171 and the second vibration isolation plane 172 in a direction perpendicular to the first vibration isolation plane 171 is L2. The ratio of the distance L2 between the first vibration isolation plane 171 and the second vibration isolation plane 172 in the direction of the motor axis 103 to the length L of the vibration body 10 in the direction of the motor axis 103 is greater than or equal to 0.3 and less than or equal to 0.7, that is, That is, the distance L2 between the first vibration isolation plane 171 and the second vibration isolation plane 172 in a direction perpendicular to the first vibration isolation plane 171 and the vibration main body 10 in a direction perpendicular to the first vibration isolation plane 171 The ratio between the lengths L is 0.3 or more and 0.7 or less. This can make the position of the second vibration isolation plane 172 more reasonable, so that the vibration reduction effect of the vibration reduction system 17 can be better improved. The position of the second vibration isolation plane 172 is reasonable. On the one hand, the vibration reduction effect of the vibration reduction system 17 can be improved, and on the other hand, the first casing 111 and the second casing 112 can be more stably supported.

In some embodiments, the first vibration isolation plane 171 is located on the front side of the center of gravity G, and the distance L1 between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 and the distance of the vibration main body 10 in the direction of the motor axis 103 The ratio of the length L is greater than or equal to 0.2 and less than or equal to 0.3, wherein “between” in this embodiment includes the end point position; or the first vibration isolation plane 171 is located on the front side of the center of gravity G, and the first vibration isolation plane 171 and The ratio of the distance L1 between the center of gravity G in the direction of the motor axis 103 and the length L of the vibration body 10 in the direction of the motor axis 103 is greater than or equal to 0.1 and less than or equal to 0.2, thereby improving the vibration reduction effect of the vibration reduction system 17; The vibration isolation plane 171 is located in front of the center of gravity G, and the ratio of the distance L1 between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 to the length L of the vibration body 10 in the direction of the motor axis 103 is greater than or equal to 0.05 and Less than or equal to 0.1, thereby improving the vibration reduction effect of the vibration reduction system 17; or, the first vibration isolation plane 171 is located in front of the center of gravity G, and the distance between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 L1 and vibration body 1 The ratio of the length L of 0 along the direction of the motor axis 103 is greater than or equal to 0 and less than or equal to 0.05, thereby improving the vibration reduction effect of the vibration damping system 17; or, the distance between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 The ratio of the distance L1 to the length L of the vibration main body 10 in the direction of the motor axis 103 is greater than or equal to 0 and less than or equal to 0.1, that is, the first vibration isolation plane 171 is located from 0.1L on the front side of the center of gravity G to 0.1L on the rear side. Or the ratio between the distance L1 in the direction of the motor axis 103 between the first vibration isolation plane 171 and the center of gravity G and the length L of the vibration body 10 in the direction of the motor axis 103 is greater than or equal to 0 and less than or equal to 0.05, that is, That is, the first vibration isolation plane 171 is located between 0.05L on the front side of the center of gravity G and 0.05L on the rear side, so that the first vibration isolation plane 171 is closer to the center of gravity G, thereby improving the vibration reduction effect of the vibration reduction system 17; Alternatively, the first vibration isolation plane 171 is located on the rear side of the center of gravity G, and the ratio of the distance L1 between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 to the length L of the vibration body 10 in the direction of the motor axis 103 is greater than Equal to 0 and less than or equal to 0.1, thereby increasing Damping effect of the system 17; or, the first vibration isolation plane 171 is located on the rear side of the center of gravity G, and the distance L1 between the first vibration isolation plane 171 and the center of gravity G in the direction of the motor axis 103 and the vibration body 10 along the motor axis The ratio of the length L in the 103 direction is 0.1 or more and 0.3 or less, thereby improving the vibration reduction effect of the vibration reduction system 17. The ratio of the distance L2 between the first vibration isolation plane 171 and the second vibration isolation plane 172 in the direction along the motor axis 103 to the length L of the vibration body 10 in the direction along the motor axis 103 is greater than or equal to 0.3 and less than or equal to 0.4; or The ratio of the distance L2 between the first vibration isolation plane 171 and the second vibration isolation plane 172 in the direction along the motor axis 103 to the length L of the vibration body 10 in the direction along the motor axis 103 is greater than or equal to 0.4 and less than or equal to 0.5; or The ratio of the distance L2 between the first vibration isolation plane 171 and the second vibration isolation plane 172 in the direction along the motor axis 103 to the length L of the vibration body 10 in the direction along the motor axis 103 is greater than or equal to 0.5 and less than or equal to 0.7. Among them, it should be said that any one of the ranges of the ratio between the distance L1 in the direction of the motor axis 103 between the first vibration isolation plane 171 and the center of gravity G and the length L of the vibration body 10 in the direction of the motor axis 103 can be equal to The combination of any one of the ratios of the distance L2 between the first vibration isolation plane 171 and the second vibration isolation plane 172 in the direction along the motor axis 103 and the length L of the vibration body 10 in the direction along the motor axis 103 is combined. Any combination of can make the damping system 17 achieve a good damping effect. It should be noted that the first vibration isolation plane 171 is disposed on the front side of the center of gravity G, and the second vibration isolation plane 172 is disposed on the rear side of the center of gravity G, that is, the center of gravity G is disposed on the first vibration isolation plane 171 and The second vibration isolation plane 172 can further improve the vibration reduction effect; and the difference in the distance between the first vibration isolation plane 171 and the second vibration isolation plane 172 also affects the vibration reduction effect. In this embodiment, The distance between the first vibration isolation plane 171 and the second vibration isolation plane 172 is set within a reasonable range, so that the vibration reduction effect of the power tool 100 is optimal.

In this embodiment, in the direction along the motor axis 103, the distance between the center of gravity G and the vibration source 134 is greater than or equal to 0 and less than or equal to 0.2L, that is, the center of gravity G is as close to the motor axis 103 as possible. The vibration source 134, so that when the first vibration isolation plane 171 is set close to the center of gravity G, the main vibration amount generated by the vibration body 10 can be isolated, and the second vibration isolation plane 172 can be provided to further isolate other vibrations of the vibration body 10 The amount of vibration can further improve the vibration reduction effect of the vibration reduction system 17.

In some embodiments, two first vibration isolation blocks 173 are disposed on the first vibration isolation plane 171, and the first vibration isolation blocks 173 are disposed on the head casing 111b, that is, two head vibration isolation blocks 171 are disposed on the first casing 111b. The first vibration isolation blocks 173 are also disposed on both sides of the mid-plane 102 respectively. The first vibration isolation block 173 has a forward stiffness having a size K, and the direction of the forward stiffness of the first vibration isolation block 173 is D. The angle between the direction D of the forward stiffness of the first vibration isolation block 173 and the direction F of the excitation force is greater than or equal to 0 degrees and less than or equal to 60 degrees. In some embodiments, the first vibration isolation The angle between the direction D of the forward stiffness of the block 173 and the direction F of the exciting force is greater than or equal to 0 degrees and less than or equal to 45 degrees. In some embodiments, the positive stiffness of the first vibration isolation block 173 is The angle between the direction D and the direction F of the excitation force is greater than or equal to 0 degrees and less than or equal to 30 degrees. In some embodiments, the direction D of the forward stiffness of the first vibration isolation block 173 and the excitation The included angle between the directions of the exciting force F of the force is greater than or equal to 0 degrees and less than or equal to 10 degrees. In some embodiments, the direction D and the exciting force of the forward stiffness of the at least one first vibration isolation block 173 may also be made. The direction of the exciting force F is parallel. In some embodiments, at least one first vibration isolation block 173 may be disposed on an orthographic projection of the excitation force direction F on the first vibration isolation plane 171. In this way, the direction D of the forward rigidity of the first vibration isolation block 173 can be made as close as possible to the excitation force direction F of the excitation force, so that the vibration reduction effect of the vibration reduction system 17 can be better improved.

The included angle between the direction D of the forward stiffness of the first vibration isolation block 173 and the direction F of the excitation force is greater than or equal to 0 degrees and less than or equal to 15 degrees; or the forward stiffness of the first vibration isolation block 173 The included angle between the direction D of the excitation force and the direction F of the excitation force is 15 degrees or more and 30 degrees or less; or, the direction D of the forward stiffness of the first vibration isolation block 173 and the excitation of the excitation force The angle between the force directions F is 30 degrees or more and 45 degrees or less; or, the angle between the direction D of the forward stiffness of the first vibration isolation block 173 and the direction F of the excitation force is greater than or equal to 45 degrees and 60 degrees or less.

In some embodiments, for the oscillating tool of this embodiment, the first vibration isolation block 173 is disposed in a plane perpendicular to the mid-plane 102 and passing through the motor axis 103, that is, the first vibration isolation The direction D of the forward stiffness of the block 173 and the left-right direction of the movement of the eccentric portion 131 are parallel to each other. In this way, the vibration reduction effect of the vibration reduction system 17 can be better improved.

In this embodiment, the number of the second vibration isolation blocks 174 on the second vibration isolation plane 172 is at least two or more. The orthographic projections of the plurality of first vibration isolation blocks 173 on the first vibration isolation plane 171 in a plane perpendicular to the motor axis 103 and the plurality of second vibration isolation blocks 174 on the second vibration isolation plane 172 are perpendicular to the motor axis The orthographic projections in the plane of 103 are at least partially staggered, the orthographic projections of the plurality of first vibration isolation blocks 173 on the first vibration isolation plane 171 on the plane perpendicular to the motor axis 103 and the second vibration isolation plane 172 The orthographic projections of the plurality of second vibration isolation blocks 174 in a plane perpendicular to the motor axis 103 may also be completely staggered, and the plane is also parallel to the first vibration isolation plane 171. In some embodiments, the orthographic projections of the plurality of first vibration isolation blocks 173 on the first vibration isolation plane 171 in a plane perpendicular to the motor axis 103 and the plurality of second vibration isolation blocks on the second vibration isolation plane 172 The orthographic projection of 174 in a plane perpendicular to the motor axis 103 is at least partially staggered in a circumferential direction around the motor axis 103. In other words, the orthographic projections of the plurality of first vibration isolation blocks 173 on the first vibration isolation plane 171 in a plane perpendicular to the motor axis 103 are a plurality of first projections, and the plurality of second projections on the second vibration isolation plane 172 are The orthographic projection of the vibration isolation block 174 in a plane perpendicular to the motor axis 103 is a plurality of second projections, wherein at least part of the plurality of first projections and at least part of the plurality of second projections are in The circumferential direction is staggered in order. In some embodiments, the orthographic projections of the plurality of first vibration isolation blocks 173 on the first vibration isolation plane 171 in a plane perpendicular to the motor axis 103 and the plurality of second vibration isolation blocks on the second vibration isolation plane 172 The orthographic projections of 174 in a plane perpendicular to the motor axis 103 are sequentially staggered in the circumferential direction around the motor axis 103. In this way, when the first vibration isolation block 173 on the first vibration isolation plane 171 absorbs the vibration of the vibration body 10 in the direction F of the vibration excitation force as much as possible, the second vibration isolation on the second vibration isolation plane 172 The block 174 can absorb the vibration of the vibration body 10 in directions other than the excitation force direction F of the excitation force as much as possible, so as to better improve the vibration reduction effect of the vibration reduction system 17. In some embodiments, the second vibration isolation block 174 is mounted on the housing of the motor 121. For the swing tool of this embodiment, both the impact direction of the eccentric portion 131 on the swing lever 133 and the swing direction of the output shaft 141 are substantially parallel to the direction F of the exciting force, and the The impact direction and the swing direction of the output shaft 141 are substantially perpendicular to the motor axis 103. Therefore, setting the first vibration isolation block 173 and the second vibration isolation block 174 in a plane perpendicular to the motor axis 103 can effectively reduce eccentricity. The primary vibration generated by the impact of the portion 131 on the swing lever 133 can also reduce the secondary vibration generated by the swing of the output shaft 141.

In this embodiment, the number of the first vibration isolation blocks 173 is two or more. The first vibration isolation blocks 173 are sequentially arranged in a circumferential direction around the motor axis 103, and in the circumferential direction, two adjacent vibration isolation blocks 173 are arranged in sequence. There is also a gap between the first vibration isolation blocks 173, that is, any two first vibration isolation blocks 173 are spaced apart; the number of the second vibration isolation blocks 174 is two or more, The second vibration isolation blocks 174 are sequentially arranged in a circumferential direction around the motor axis 103, and in the circumferential direction, there is a gap between two adjacent second vibration isolation blocks 174, that is, any two first vibration isolation blocks 174 The two vibration isolation blocks 174 are spaced apart. In this way, the vibration generated by the vibration body 10 can be isolated from multiple directions, and the vibration reduction effect can be improved.

It should be noted that in this embodiment, the first vibration isolation plane 171 uses a plurality of first vibration isolation blocks 173 disposed at intervals to achieve a vibration reduction effect. It can be understood that in other embodiments, the first vibration isolation Vibration isolation may also be achieved on the plane 171 by providing a ring-shaped vibration isolation block extending in a circumferential direction around the motor axis 103. Similarly, the second vibration isolation plane 172 can achieve vibration reduction effects through a plurality of second vibration isolation blocks 174 disposed at intervals. It can be understood that in other embodiments, the second vibration isolation plane 172 can also be provided by A ring-shaped vibration isolation block extending in a circumferential direction around the motor axis 103 is used to achieve vibration isolation. Moreover, in this embodiment, the first vibration isolation plane 171 and the second vibration isolation plane 172 are spaced apart, that is, the first vibration isolation block 173 and the second vibration isolation block 174 are perpendicular to the first vibration isolation plane along the The directions of 171 are spaced apart, so that on the one hand, the vibration isolation effect can be improved while using as few vibration isolation blocks as possible, and on the other hand, the first housing 111 is located on the first vibration isolation plane 171 and the second vibration isolation. A gap is provided between a portion between the planes 172 and a portion of the second casing 112 located between the first vibration isolation plane 171 and the second vibration isolation plane 172, thereby further preventing the first casing 111 from being transmitted to the second Vibration of the housing 112. In some embodiments, a portion of the first housing 111 between the first and second vibration isolation planes 171 and 172 and a portion of the second housing 112 between the first and second vibration isolation planes 171 and 172 The gap provided between the sections 172 is an annular gap around the motor axis 103.

In some embodiments, the second vibration isolation block 174 on the second vibration isolation plane 172 is disposed on the motor housing portion 111d, that is, the second vibration isolation plane 172 passes through the motor housing portion 111d.

It can be understood that, in this text, the vibration body 10 further includes a third vibration isolation plane 175 that is perpendicular to the motor axis 103 of the motor shaft 121a. A third vibration isolation block and a third vibration isolation plane are provided on the third vibration isolation plane 175. 175 is also disposed between the first vibration isolation plane 171 and the second vibration isolation plane 172.

In this embodiment, the first vibration isolation block 173, the second vibration isolation block 174, and the third vibration isolation block are all made of polyurethane foam material, which has good elasticity and good recovery performance. The first vibration isolation block 173 or the second vibration isolation block 174 is also disposed in the handle portion 112a, so that the vibration transmitted to the user's hand can be further reduced. There is a gap between the motor case portion 111d and the second case 112, and a second vibration isolating block 174 is provided in the gap.

In this embodiment, after the power tool 100 is started and measured under no load, a vibration acceleration can be obtained, and the value of the vibration acceleration is a meter / second ^ 2, so that the vibration reduction effect of the power tool 100 is improved Next, we can make the cutting ability of the power tool 100 greatly improved. Specifically, for a swing tool, the maximum rotation speed of the motor 121 is R revolutions per minute, and the swing angle of the output shaft 141 is A degrees, where the ratio of the rotation speed R of the motor 121 to the vibration acceleration a of the power tool 100 5000 or more and 20000 or less. The ratio of the swing angle A of the output shaft 141 to the vibration acceleration a of the power tool 100 is 1 or more and 3 or less. In some embodiments, the ratio of the speed R of the motor 121 to the vibration acceleration a of the power tool 100 is greater than or equal to 5000 and less than or equal to 6000, or the ratio of the speed R of the motor 121 to the vibration acceleration a of the power tool 100 is greater than or equal to 6000 and 10,000 or less, or a ratio of the rotation speed R of the motor 121 to the vibration acceleration a of the power tool 100 is 10,000 or more and 20,000 or less. The ratio of the swing angle A of the output shaft 141 to the vibration acceleration a of the power tool 100 is 1 or more and 1.7 or less; or the ratio of the swing angle A of the output shaft 141 to the vibration acceleration a of the power tool 100 is 1.7 or more and less than 3. In this way, for the power tool 100 with a relatively large vibration amplitude, when the vibration problem of the power tool 100 is resolved, the output efficiency of the power tool 100 can be further improved, thereby meeting people's increasing demand for low vibration. The demand for the power tool 100 has also greatly promoted the development of the power tool 100. More specifically, according to our appropriate adjustment of the structure, performance, and position of the vibration damping system 17, the rotation speed R of the motor 121 can be 20,000 or more and 22,000 or less, or the rotation speed R of the motor 121 can be made greater than or equal to 22000, the swing angle A of the output shaft 141 may be 3.6 or more and 5 or less, or the swing angle A of the output shaft 141 may be 5 or more.

In this paper, the vibration of the power tool is better controlled, which can improve the user's work efficiency.

Claims

A power tool including:

A power assembly, including a motor, the motor including a motor shaft capable of rotating about a motor axis;

Output components, including output shafts set to output power;

A transmission component configured to realize power transmission between the power component and the output component;

A first housing capable of supporting at least the power component, the transmission component, and the output component;

A second housing that surrounds at least a portion of the first housing, and the second housing further includes a handle portion configured to be held by a user;

The power tool is provided with a first vibration isolation plane and a second vibration isolation plane. The first vibration isolation plane is provided with a first vibration isolation block, and the second vibration isolation plane is provided with a second vibration isolation block. ; An entirety formed by the first vibration isolating block and the second vibration isolating block has at least a space portion provided between the first casing and the second casing, and the second casing is in The interval portion is spaced apart from the first housing; the first vibration isolation block and the second vibration isolation block are separated from each other.
The power tool according to claim 1, wherein a structure generating vibration in the power tool is defined as a vibration main body, and the vibration main body includes at least the power component, the output component, the transmission component, and the first housing, and The vibration body has a center of gravity, and the length of the vibration body in the direction along the axis of the motor is L;

The first vibration isolation plane and the motor axis are perpendicular to each other, and the distance between the first vibration isolation plane and the center of gravity of the vibration body in the direction of the motor axis is L1; The ratio of the distance L1 in the direction of the motor axis between the vibration isolation plane and the center of gravity of the vibration body to the length L of the vibration body in the direction along the motor axis is greater than or equal to 0 and less than or equal to 0.3.
The power tool according to claim 2, wherein the second vibration isolation plane and the motor axis are perpendicular to each other, and a distance between the first vibration isolation plane and the second vibration isolation plane is L2; A ratio of a distance L2 between the first vibration isolation plane and the second vibration isolation plane to a length L of the vibration body in a direction along the axis of the motor is greater than or equal to 0.3 and less than or equal to 0.7.
The power tool according to claim 2, wherein a center of gravity of the vibration body is located between the first vibration isolation plane and the second vibration isolation plane.
The power tool according to claim 2, wherein the vibration body further defines a third vibration isolation plane perpendicular to the motor axis, and a third vibration isolation block is disposed on the third vibration isolation plane, and A third vibration isolation plane is disposed between the first vibration isolation plane and the second vibration isolation plane.
The power tool according to claim 1, wherein the first casing and the second casing are spaced apart from each other, and the first vibration isolating block is disposed on the first casing and the second casing. Between the bodies, the second vibration isolation block is disposed between the first casing and the second casing.
The power tool according to claim 1, wherein the first vibration isolation plane and the second vibration isolation plane are parallel to each other, and the first vibration isolation block and the second vibration isolation block are perpendicular to the first A vibration isolation plane is spaced from each other in the direction.
The power tool according to claim 1, wherein the first housing is symmetrical about a mid-plane, the number of the first vibration isolation blocks is at least two, and the first vibration isolation blocks are symmetrically distributed. On both sides of the midplane.
The power tool according to claim 1, wherein at least part of the first vibration isolation block or at least part of the second vibration isolation block is provided in the handle portion.
The power tool according to claim 1, wherein the first vibration isolation plane and the second vibration isolation plane are parallel to each other, and the second vibration isolation block on the second vibration isolation plane The orthographic projection in a plane parallel to the vibration isolation plane and the orthographic projection of the first vibration isolation block on the first vibration isolation plane on the plane are at least partially interlaced.
The power tool according to claim 1, wherein:

The first housing includes:

A motor housing portion configured to support the motor;

A head shell configured to support the output shaft;

The head case is disposed on the front side of the motor case portion and forms a fixed connection with the motor case portion;

The first vibration isolation block is mounted to the head case.
The power tool according to claim 11, wherein the second vibration isolating block is attached to the motor case portion.
The power tool according to claim 12, wherein a gap is provided between the motor housing portion and the second housing, and the second vibration isolating block is disposed in the gap.
The power tool according to claim 1, wherein the output shaft is capable of swinging within a swing angle A degree around the output axis; the swing angle A of the output shaft is 3.6 or more and 5 or less.
The power tool according to claim 1, wherein the motor has a maximum rotation speed R rpm, and the maximum rotation speed R of the motor is 20,000 or more and 22,000 or less.
The power tool according to claim 1, wherein the number of the first vibration isolation blocks is two or more, and the first vibration isolation blocks are sequentially arranged in a circumferential direction around the motor axis; and in the circumferential direction There is a gap between two adjacent first vibration isolation blocks.
The power tool according to claim 1, wherein the output shaft is capable of swinging within a swing angle A with the output axis as a center; and the transmission assembly includes: an impact portion and vibrations that can be excited along the impact portion. A pendulum that is impacted by the force direction F; at least one of the positive stiffness direction D of the first vibration isolation block and the exciting force direction F forms an included angle that is greater than or equal to 0 degrees and less than or equal to 60 degrees.
The power tool according to claim 17, wherein a forward stiffness direction D of at least one of the first vibration isolation blocks is parallel to the excitation force direction F.
The power tool according to claim 1, wherein the first vibration isolation block is made of a polyurethane foam material.
The power tool according to claim 1, wherein the power tool includes at least two of the first vibration isolation blocks; and the power tool includes at least two of the second vibration isolation blocks.