WO2017206923A1

WO2017206923A1 - Oscillating power tool

Info

Publication number: WO2017206923A1
Application number: PCT/CN2017/086727
Authority: WO
Inventors: 张士松; 庞晓丽; 钟红风; 吴宇; 李伟锋
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2016-05-31
Filing date: 2017-05-31
Publication date: 2017-12-07
Also published as: CN207480526U

Abstract

Disclosed is an oscillating power tool (100), comprising a housing (110); an output shaft (150) for installing a working head, the output shaft (150) being installed in the housing (110) and extending out of the housing (110); a transmission mechanism (140) being installed in the housing (110), and the transmission mechanism (140) being connected to the output shaft (150); and an electric motor (120) being installed in the housing (110), the electric motor (120) being connected to the transmission mechanism (140) and driving the transmission mechanism (140) to drive the output shaft (150) to move. The outer diameter of the electric motor (120) is in the range of 40-50 mm. The electric motor having an outer diameter in the range of 40-50 mm is used to supply power for the oscillating power tool, so that the oscillating power tool has a small overall size and is easy to hold for an operator.

Description

Swing power tool

Technical field

The present application relates to the field of power tool technology, and in particular to a swing power tool.

Background technique

The oscillating machine is a hand-held oscillating power tool commonly used in the industry. Its working principle is that the driving shaft oscillates around its own axis line, thereby driving the oscillating movement of the working head attachment mounted at the end of the driving shaft. Common work heads include straight saw blades, circular saw blades, triangular sanding discs, and spade scrapers. When the operator installs different working heads on the drive shaft, a variety of different operating functions, such as sawing, cutting, grinding, scraping, etc., can be realized to suit different work requirements.

Due to the different characteristics of ethnic groups, the palms of East Asian yellow races are smaller than the European and American white races, and the length of Chinese male palms is usually between 175mm and 200mm, and the width is between 80mm and 90mm; the length range of Chinese female palms It is usually between 160mm and 180mm and the width is between 65mm and 80mm. For the current oscillating machine, due to the limitation of its internal structure, the operator is not easy to hold the oscillating machine while using the oscillating machine. At the same time, the oscillating machine generates large vibration during operation, thereby bringing the operation of the operator. Inconvenience, it is not convenient for the operator to hold the use for a long time, which affects the processing efficiency.

Summary of the invention

Based on this, it is necessary to provide a swinging power tool that can be easily used by the operator for a long time in view of the problem that the current swinging machine is inconvenient for the operator to hold for a long time.

The above objectives are achieved by the following technical solutions:

A swinging power tool comprising:

case;

An output shaft for mounting a working head, the output shaft being mounted in the housing and extending out of the housing;

a transmission mechanism installed in the housing, and the transmission mechanism is coupled to the output shaft; and

a motor mounted in the housing, the motor being coupled to the transmission mechanism, and driving the transmission mechanism to drive the output shaft to move;

Wherein, the outer diameter of the motor ranges from 40 mm to 50 mm.

In one embodiment, the housing includes a first area and a second area, the motor is mounted to the first area, the output shaft is mounted to the second area, the first area includes a grip, the grip The area of the first cross section of the holder is smaller than the area of the second cross section of the second region, the first cross section being parallel to the second cross section.

In one embodiment, the outer contour of the stator of the motor is formed by a pair of straight sides and a pair of arc edges, the outer contour of the stator being symmetrical with respect to the first center line and the second center line, and the straight side is The length in the direction parallel to the first center line is greater than the length in the direction parallel to the second center line.

In one of the embodiments, the oscillating power tool further includes a brush disposed in a direction at an acute or obtuse angle to the straight edge.

In one of the embodiments, the outer diameter of the motor ranges from 46 mm to 48 mm.

In one of the embodiments, the motor has an outer diameter of 46 mm.

In one of the embodiments, the motor has a stack length ranging from 45 mm to 75 mm.

In one of the embodiments, the motor has a stack length in the range of 60 mm.

In one of the embodiments, the power of the motor ranges from 400 W to 450 W.

In one embodiment, the housing is provided with a grip portion, and the circumference of the grip portion ranges from 135 mm to 175 mm.

In one embodiment, the housing includes an outer casing and an inner casing;

The outer casing is disposed on an outer side of the inner casing;

The motor, the transmission mechanism and the output shaft are all located in the inner casing.

In one embodiment, the inner casing includes a motor casing and a head casing;

The output shaft and the transmission mechanism are located in the head case, and the motor is located in the motor case.

In one embodiment, the oscillating power tool further includes a damping element;

The damping element is disposed between the head shell and the outer casing;

And/or, the damping element is disposed between the motor casing and the outer casing;

And the damping element is a vibration damping block, a vibration damping pad or a vibration damping ring.

The beneficial effects of the application are:

The swinging power tool of the present application has a simple and reasonable structural design, and the motor with an outer diameter of 40 mm to 50 mm is used to power the swinging power tool, and the housing is limited by the outer diameter of the motor. The size of the grip portion is reduced, so that the overall size of the swinging power tool of the present application is small, which is convenient for the operator to hold. At the same time, the swinging power tool generates vibration during work, and the size of the whole machine is small. The operator holds the machine for a long time, which is convenient for the operator to use and ensure the processing efficiency. Especially for the double-layer casing with the vibration-damping oscillating power tool, the size of the grip can be effectively reduced, and the same grip size of the swinging tool without the vibration reduction of the single-layer casing can be achieved, and the vibration is reduced. At the same time, it does not reduce the user's operating experience.

DRAWINGS

1 is a front elevational view of a swinging power tool according to an embodiment of the present application;

2 is a front cross-sectional view of a swinging power tool according to an embodiment of the present application;

Figure 3 is a front cross-sectional view of a swinging power tool according to another embodiment of the present application;

4 is a top cross-sectional view of the oscillating power tool according to an embodiment of the present application;

Figure 5 is a side cross-sectional view of the oscillating power tool according to an embodiment of the present application;

Fig. 6 is a schematic view showing the arrangement of a carbon brush and a commutator of the oscillating power tool according to an embodiment of the invention.

detailed description

In order to make the objects, technical solutions and advantages of the present application more clear, the swinging power tool of the present application will be further described in detail below by way of embodiments and with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

Referring to FIGS. 1 through 4 , the present application provides an oscillating power tool 100 including a housing 110 , an output shaft 150 , a transmission mechanism 140 , and a motor 120 . In conjunction with FIG. 2, in one embodiment, the transmission mechanism 140 is an eccentric transmission mechanism disposed within the head housing 1122 and includes a shift fork 141 and an eccentric assembly 142 coupled to the motor shaft 124. The eccentric assembly 142 includes an eccentric shaft coupled to the motor shaft and a drive wheel mounted on the eccentric shaft. One end 1411 of the shift fork 141 is coupled to the top of the output shaft 150 and the other end is coupled to the drive wheel of the eccentric assembly 142. The shift fork 141 includes a sleeve 1411 sleeved on the output shaft 34 and a fork portion 1412 extending horizontally from the top end of the sleeve 1411 toward the motor shaft 124. In the present embodiment, the drive wheel is a ball bearing having a spherical outer surface that mates with the fork portion 1412 of the shift fork 141. The eccentric shaft is eccentrically coupled to the motor shaft 124, that is, the axis of the eccentric shaft does not coincide with the axis of the motor shaft 124, and is radially offset by a certain distance. The fork portion 1412 of the shift fork 141 is wrapped around both sides of the drive wheel and is in sliding contact with the outer surface of the drive wheel.

When the motor drive motor shaft 124 rotates, the eccentric shaft rotates eccentrically with respect to the axis of the motor under the driving of the motor shaft 124, thereby driving the driving wheel to rotate eccentrically with respect to the axis of the motor. Driven by the drive wheel, the shift fork 141 swings relative to the axis of the output shaft to further oscillate the output shaft 150 about its own axis. The output shaft 150 swings to drive the working head mounted thereon to swing the workpiece.

Referring to Figures 3 through 4, in the present application, the output shaft 150 is used to mount the working head. The output shaft 150 is mounted on the housing 110 and extends out of the housing 110, which facilitates mounting of a working head (not shown) on the output shaft 150. The motor 120 provides power to the oscillating power tool 100, and the power of the motor 120 is transmitted to the output shaft 150 through the transmission mechanism 140, thereby swinging the power tool 100 to perform a swing operation. Moreover, the output shaft 150 is extended from the housing 110, and the output shaft 150 is coupled to the transmission mechanism 140, so that the transmission mechanism 140 can transmit the power of the motor 120 to the output shaft 150, and the output shaft 150 drives the working head to realize the swing operation. When the oscillating power tool 100 is in operation, the transmission mechanism 140 moves, thereby transmitting the power of the motor 120 to the output shaft 150, and the output shaft 150 drives the working head to realize the oscillating motion of the oscillating power tool 100. Work heads include straight saw blades, circular saw blades, triangular sanding discs and spade scrapers. When the operator installs different working heads on the output shaft 150, a variety of different operating functions, such as sawing, cutting, grinding, scraping, etc., can be realized to suit different work requirements and are convenient to use.

3 and 4, the housing 110 extends along the axis of the motor 120 and can be divided into a first region 113 remote from the output shaft 150 and a second region 114 adjacent the output shaft 150. The first area 113 accommodates the motor 120 and includes a grip 115 formed on the outside of the motor 120 for the user to hold, and the power control switch 160 is disposed adjacent to the grip 115 or directly disposed on the grip 115; The second region 114 then houses the transmission mechanism 140. The grip portion 115 has a first cross section 1151 that is located within the stack length of the motor 120. The second region 114 has a second cross section 1141, the area of the first cross section 1141 is smaller than the area of the second cross section 1151, and the first cross section 1141 is parallel to the second cross section 1151. That is to say, the overall outer contour size of the grip portion 115 is smaller than that of the second region 114, and it is apparent that such a design makes it easier for the user to hold, and also reduces the fatigue of using the swing power tool for a long time.

Of course, the size of the grip portion 115 is not arbitrarily changed, and it is necessary to simultaneously consider factors such as how the internal components of the grip portion 115 (such as the motor 120, the carbon brush 170) are selected, the design of the component position, and how the heat dissipation air passage is disposed.

The length of the first cross section 1151 of the grip portion 115 in the vertical direction is not equal to the length in the horizontal direction, that is, the width and the height are not equal, and the size in the vertical direction is large. The grip portion 115 is wrapped around the outer contour of the motor 120, so that the shape of the grip portion 115 is determined by the motor 120 to a certain extent.

Referring to FIG. 4, in the present embodiment, the outer contour of the motor 120 is substantially the same as the grip portion 115, that is, the outer contour of the motor 120 is not a conventional regular cylindrical shape. The outer contour of the motor 120 is the outer contour of the motor stator 121. In this embodiment, the outer contour of the stator 121 of the motor 120 is surrounded by two curved sides 1211 and two straight sides 1212, and two straight sides are defined. 1212 extends in a direction parallel to the first center line a, and the two curved sides 1211 extend substantially in a direction parallel to the second center line b, and the outer contour of the stator 121 is opposite to the first center line a and the second center Line b is symmetrical. The length of the straight side 1212 in the direction parallel to the first center line a is greater than the length of the circular side 1211 in the direction parallel to the second center line b. In the present embodiment, the length of the straight side 1212 in the direction parallel to the first center line a (the height in this embodiment) is greater than 45 mm, and the length of the arc 1211 in the direction parallel to the second center line b (Width in this embodiment) is 36 to 43 mm. Of course, for the user group with different holding habits, the height of the outer contour of the stator can also be set smaller, and the width is larger, and the grip portion 115 is also adaptively changed, for example, the curved edge 1211 is vertical. Set, straight edge 1212 horizontal setting.

Referring to FIG. 4 and FIG. 6 , the motor 12 is a brushed motor, and includes a motor shaft 124 , a stator 121 , a rotor 122 , and a commutator 123 disposed on the motor shaft. The commutator 123 can also be disposed on the grip portion. In the 115, the carbon brush 170 is disposed opposite the commutator 123 and abuts against the commutator 123. The carbon brush 170 is disposed at an acute or obtuse angle with the straight edge, that is, the carbon brush is disposed at an obtuse or acute angle with the first center line a. In other words, the arrangement direction of the carbon brush 170 is opposite to the first center line a and the second. The center line b is not parallel. Referring to FIG. 5, the carbon brush 170 is disposed at an angle of 45 degrees to both the first center line a and the second center line b. Of course, due to the different shapes of the grips, the direction of the arrangement may be at other angles to the first centerline a. The carbon brush 170 is disposed such that the internal space of the grip portion 115 is not additionally occupied, and the inner contour size of the grip portion is not increased, and the outer contour size is not increased under the premise that the thickness of the grip portion 115 is constant. .

The motor 120 is mounted in the housing 110 and connected to the transmission mechanism in the housing 110. The outer diameter of the motor 120 ranges from 40 mm to 50 mm, that is, the outer diameter D of the stator ranges from 40 mm to 50 mm, and the stator The length L (effective magnetic field length) is not less than 45 mm. The motor 120 is the entire swing power tool 100 The power source drives the transmission mechanism through the motor 120, so that the transmission mechanism drives the output shaft to rotate, thereby driving the working head to work. At the same time, the outer diameter D of the motor 120 ranges from 40 mm to 50 mm, which can reduce the size of the swinging power tool 100, thereby reducing the size of the grip, facilitating the grip of the operator, and improving the comfort during the grip. Compared with the current swinging machine, the outer diameter of the motor 120 of the present application is smaller, and the size of the housing 110 is correspondingly reduced, so that the operator can more easily hold the swinging power when swinging the power tool 100 in use. The tool 100 increases the comfort of the grip.

In the present embodiment, the oscillating power tool 100 is an oscillating machine, and the oscillating motion is realized by the oscillating machine, so that the operator can operate the object. When in use, different working heads can be installed on the oscillating machine to adapt to different usage requirements, which is convenient and quick.

For the current oscillating machine, the operator needs to hold the oscillating machine when using the oscillating machine, but the oscillating machine generates large vibration during operation, and the outer diameter of the oscillating machine is large, which is inconvenient for the operator. Long-term use. The oscillating power tool 100 of the present application uses the motor 120 having an outer diameter D between 40 mm and 50 mm to power the oscillating power tool 100, and the housing 110 is used for the grip portion due to the limitation of the outer diameter of the motor 120. The size of the oscillating power tool 100 of the present application is smaller, which is convenient for the operator to hold. At the same time, the oscillating power tool 100 generates vibration during operation, and the small size of the whole machine can facilitate the operator for a long time. The grip is easy for the operator to use to ensure the processing efficiency.

Further, the outer diameter D of the motor 120 ranges from 46 mm to 48 mm. The outer diameter of the motor 120 is in the range of 46 mm to 48 mm, and the motor 120 can ensure that the swing power tool 100 provides a better power source while ensuring that the housing 110 of the swing power tool 100 has a small size and is easy to operate. Personnel hold.

Preferably, in the present embodiment, the outer diameter D of the motor 120 is 46 mm. In combination with FIG. 2 and FIG. 3, the ratio of the stack length L (effective magnetic path length) of the motor to the outer diameter D is greater than 1, and the stack length L of the motor. Preferably, it is 50 mm, and the grip size of the housing 110 is further reduced, so that the swing power tool 100 is better in overall size, and the comfort during gripping is improved. That is to say, the motor 120 in this embodiment is a 46 motor to further reduce the overall size of the oscillating power tool 100, which is convenient for the operator to hold for a long time and improve comfort.

In other embodiments, the outer diameter of the motor may also be other sizes. When the outer diameter D is 42 mm, the ratio of the stack length L to the outer diameter D of the motor is greater than or equal to 15/14, and the stack length L of the motor is preferably 55mm; When the outer diameter D is 50 mm, the ratio of the stack length L of the motor to the outer diameter D is greater than or equal to 9/10, and the stack length L of the stator motor is preferably 45 mm.

As an embodiment, the motor 120 has a stack length ranging from 45 mm to 75 mm. That is, the length of the stator core of the motor 120 ranges from 45 mm to 74 mm. By limiting the stack length and outer diameter of the motor 120, the overall size of the oscillating power tool 100 is ensured, so that the overall size of the oscillating power tool 100 is reduced, which is convenient for the operator to use during use, and is convenient to use. Preferably, in the present embodiment, the motor 120 has a stack length of 60 mm.

As an implementation manner, the power of the motor 120 ranges from 400 W to 450 W to ensure that the oscillating power tool 100 can work normally. Moreover, the stack length of the motor 120 is different, and the power of the motor 120 is also different, as shown in the following table.

As an embodiment, the housing 110 is provided with a grip portion 115. The circumference of the grip portion 115 ranges from 135 mm to 175 mm. The grip portion of the housing 110 is restricted by the size of the outer diameter of the motor 120. The circumference is in the range of 135 mm to 175 mm, so that the operator can hold the swinging power tool 100, thereby facilitating the operation of the swinging power tool 100 and ensuring the processing efficiency.

As an implementation manner, the housing 110 includes an outer casing 111 and an inner casing 112, and the outer casing 111 is sleeved on the inner casing 112. Moreover, the motor 120, the transmission mechanism, and the output shaft are all located in the inner casing 112. The motor 120 is mounted in the inner casing 112 and is coupled to a transmission mechanism in the inner casing 112. The oscillating power tool 100 of the present application may be a single-layer case or a double-layer case. The swing power tool 100 is In the case of a single-layer case, the single-layer case is the inner case 112, and the operator directly holds the surface of the inner case 112 when in use. When the swinging power tool 100 is a double-layer casing, the double-layer casing includes an outer casing 111 and an inner casing 112, and the outer casing 111 is sleeved on the outer side of the inner casing 112, and the operator directly holds the outer casing during use. The surface of 111.

Further, the inner casing 112 includes a motor casing 1121 and a head casing 1122. The motor case 1121 and the head case 1122 may also be located in the outer case 111. The motor 120 is located in the motor casing 1121, and the output shaft and the transmission mechanism are located in the head casing 1122, and protrude from the head casing 1122 to facilitate the installation of the working head. In the present embodiment, the motor casing 1121 is located in the outer casing 111, and the outer casing 111 partially wraps the head casing 1122. That is, the outer casing 111 is covered with the motor casing 1121 and a portion of the head casing 1122.

Moreover, the oscillating power tool 100 further includes a damper element 130 that is mounted between the inner casing 112 and the outer casing 111. Specifically, the damping element 130 may be disposed only between the motor casing 1121 and the outer casing 111, or may be disposed only between the head casing 1122 and the outer casing 111. Of course, the damping elements 130 may also be disposed between the motor housing 1121 and the outer casing 111 and between the head casing 1122 and the outer casing 111. In the present embodiment, the damping element 130 is disposed between the motor casing 1121 and the outer casing 111 and between the head casing 1122 and the outer casing 111. For convenience of description, the present embodiment will be described by taking the damping element 130 between the outer casing 111 and the inner casing 112 as an example.

Thus, the vibration generated by the head shell 1122 has two paths of transmission, one path is that the vibration of the head shell 1122 is transmitted to the outer casing 111 through the inner casing 112, and the other path is that the head shell 1122 directly transmits the vibration to the outer casing. 111. By transmitting the vibration together through the two paths, the vibration of the transmission portion of each path can be ensured, and the vibration is attenuated during the transmission, so that the vibration received by the outer casing 111 is greatly reduced, thereby reducing the effect on the operator's hand. The force weakens the impact of the swinging power tool 100 on the operator's arm, the hand, and the like, and improves the comfort during operation, and is convenient for the operator to hold for a long time.

The damping element 130 has a damping effect, and when vibrating through the damping element 130, the damping element 130 can utilize its own damping characteristics such that the vibration transmitted by the damping element 130 is greatly reduced. The damping element 130 is disposed between the inner casing 112 and the outer casing 111, and the damping component 130 can support the outer casing 111 such that the inner surface of the outer casing 111 does not contact the outer surface of the inner casing 112. . That is, the inner casing 112 and the outer casing 111 are not in direct contact, and the inner casing 112 and the outer casing are built by the damping component 130. The connection relationship between the 111 causes the vibration on the inner casing 112 to be transmitted only to the outer casing 111 through the damping element 130, and the vibration can be greatly attenuated during the transmission through the damping element 130, thereby damping the component The vibration transmitted to the outer casing 111 by 130 is greatly reduced, thereby reducing the force on the operator's hand, weakening the impact of the swinging power tool 100 on the operator's arm, and the impact on the hand, thereby improving the comfort during operation. It is easy for the operator to hold for a long time.

The outer diameter of the motor 120 is in the range of 40 mm to 50 mm, and the motor 120 is located in the motor casing 1121. When the outer casing 111 is disposed on the motor casing 1121 and the partial head casing 1122, the size of the motor casing 1121 can be reduced. In addition, the size of the outer casing 111 can be reduced, thereby reducing the size of the grip portion, facilitating the grip of the operator, and improving the comfort during the grip. Compared with the current swinging machine, the outer diameter of the motor 120 of the present application is smaller, so that the sizes of the motor casing 1121 and the outer casing 111 of the covering motor 120 are correspondingly reduced, so that the operator swings in use. When the power tool 100 is used, it is more convenient to hold the outer casing 111, which increases the comfort of the grip. At the same time, the oscillating power tool 100 of the present application combines the double effects of vibration damping and easy grip, and the grip comfort and vibration damping performance are both convenient for the operator to hold for a long time.

At present, the operator needs to hold the oscillating machine when using the oscillating machine, but the oscillating machine generates large vibration during operation, and the vibration of the oscillating machine is large and the vibration is strong, which is inconvenient for the operator. Hold and use. The outer casing 111 of the oscillating power tool 100 of the present application is disposed on the outer side of the inner casing 112, and a vibration damping member 130 is installed between the outer casing 111 and the inner casing 112, and the oscillating power tool 100 is generated during operation. Vibration, and vibration is mainly generated by the head case 1122, the head case 1122 transmits vibration to the inner casing 112, and the inner casing 112 is also subjected to vibration, since the inner casing 112 and the outer casing 111 pass through the damping element 130. The connection, the damping element 130 can utilize its own damping characteristics such that the vibration transmitted to the outer casing 111 through the damping element 130 is greatly reduced, thereby reducing the force on the operator's hand and attenuating the operation of the oscillating power tool 100. The impact of the arm of the person, the impact of the hand, etc., improve the comfort during operation, and is convenient for the operator to hold for a long time.

As an implementation manner, a preset gap exists between the outer casing 111 and the inner casing 112, and the damping component 130 is installed in the preset gap. In this way, it is more ensured that there is no direct contact between the inner surface of the outer casing 111 and the outer surface of the inner casing 112, and the vibration of the inner casing 112 is prevented from being directly transmitted to the outer casing 111, and the vibration can be transmitted through the damping element 130. Increase the transmission path of vibration, and also pass the vibration reduction element The vibration damping characteristic of the piece 130 itself attenuates part of the vibration so that the vibration transmitted by the damping element 130 is reduced. The damping member 130 is disposed in the preset gap, so that the vibration damping member 130 can be reduced in the vibration of the outer casing 111, and the assembly of the swinging power tool 100 can be facilitated and used.

Further, the preset gap ranges from 2 mm to 3 mm. When the preset gap is in the range of 2 mm to 3 mm, the inner surface of the outer casing 111 and the outer surface of the inner casing 112 are not directly contacted, and the vibration of the inner casing 112 is prevented from being directly transmitted to the outer casing. The shell 111 can also ensure that the size of the outer casing 111 is not too large, which is convenient for the operator to hold, saves the operator's physical strength, and improves the comfort during the grip.

As an implementation manner, the length of the outer casing 111 is greater than the length of the motor casing 1121, and the outer casing 111 covers the motor casing 1121 and a portion of the head casing 1122.

As an implementation manner, the number of the damping elements 130 is at least two, and at least two damping elements 130 are respectively disposed on the outer surface of the head shell 1122 and one end of the motor housing 1121 away from the head shell 1122. . That is, at least two damping elements 130 are respectively disposed on the head case 1122 and the motor case 1121. The head case 1122 is in contact with the outer case 111 through the damping element 130, and the motor case 1121 passes through the damping element 130. In contact with the outer casing 111, the inner surface of the outer casing 111 and the outer surface of the motor casing 1121 are not in direct contact, and the outer surface of the head casing 1122 is not in direct contact with the inner surface of the outer casing 111, such that The vibration can be directly transmitted to the outer casing 111, thereby reducing the vibration of the outer casing 111, weakening the impact of the swinging power tool 100 on the operator's arm, and the impact of the hand, thereby improving the comfort during operation and facilitating The operator holds it for a long time.

As an embodiment, the damping element 130 is a vibration damping block, a vibration damping pad or a vibration damping ring or the like. The vibration found by the outer casing 111 is reduced by the damping element 130 for the vibration damping block, the vibration damping pad or the damper ring or the like. When the damping element 130 is a vibration damping block or a damping pad, the number of the damping elements 130 may be at least four, and at least four damping elements 130 are respectively disposed at the end of the head case 1122 and the motor case 1121 away from the head case 1122. . When the damping element 130 is a damper ring, the number of the damper elements 130 may be at least two, and at least two damper elements 130 are respectively sleeved on the end of the head case 1122 and the motor case 1121 away from the head case 1122.

The damping element 130 can be made of an elastic material, and the vibration of the outer casing 111 is reduced by the elastic action of the elastic material itself, thereby greatly reducing the impact of the outer casing 111 on the hand and the hand. Specifically, the damping element 130 is made of an elastic material such as rubber, nylon or plastic to ensure the damping element. The 130 has a cushioning action and is capable of converting the vibration received by the damping element 130. Of course, the damping element 130 can also be a bellows having a foldable corrugated sheet so that the bellows can be compressed in the direction of the folding telescopic direction, and the vibration of the damping element 130 is converted by the folding of the foldable corrugated sheet. The vibration received by the outer casing 111 is reduced, and the impact of the outer casing 111 on the human hand and the hand is greatly reduced.

As an embodiment, the damping element 130 is oppositely disposed on the head casing 1122 and the motor casing 1121. The inner wall of the outer casing 111 is provided with a protruding portion, and the protruding portion is mounted on the oppositely disposed damping element 130. between. The protruding portion protrudes from the inner surface of the outer casing 111, and the outer casing 111 is mounted by the contact of the protruding portion with the damping element 130, and the outer casing 111 is supported, so that the inner surface of the outer casing 111 is not electrically connected. The outer surface of the casing 1121 and the outer surface of the head casing 1122 are in direct contact, and at the same time, the vibration damping element 130 transmits the vibration to the convex portion first, and then is transmitted from the convex portion to the outer casing 111, thereby increasing the transmission path of the vibration. Further, the vibration received by the outer casing 111 is further reduced.

Further, an interference fit is formed between the protrusion and the oppositely disposed damping element 130. That is to say, the oppositely disposed damping element 130 and the protruding portion are in a tight fit, and the protruding portion is fixed by the oppositely disposed damping member 130, so that the protruding portion does not occur in the process of being subjected to vibration. Then, the position of the outer casing 111 is fixed, and no turbulence occurs. In this way, when the swing power tool 100 is used, the operator can hold the outer casing 111 to realize the swing motion, thereby ensuring the operation precision and being convenient to use.

As an implementation manner, the outer casing 111 includes a first casing and a second casing, and the first casing and the second casing are combined to form an outer casing 111; in the first casing or the second casing A fastening member is disposed on the first casing and the second casing through the fastening component. This can facilitate the assembly and disassembly of the outer casing 111 and is convenient for the operator to use. At the same time, the fastening component can make the first casing and the second casing fast and reliable, and will not loosen during the work, so as not to affect the use.

The above-mentioned embodiments are merely illustrative of several embodiments of the present application, but are not to be construed as limiting the scope of the claims. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

An oscillating power tool, comprising:

case;

An output shaft for mounting a working head, the output shaft being mounted in the housing and extending out of the housing;

a transmission mechanism installed in the housing, and the transmission mechanism is coupled to the output shaft; and

a motor mounted in the housing, the motor being coupled to the transmission mechanism, and driving the transmission mechanism to drive the output shaft to move;

Wherein, the outer diameter of the motor ranges from 40 mm to 50 mm.
The oscillating power tool according to claim 1, wherein the housing comprises a first area and a second area, the motor is mounted on the first area, and the output shaft is mounted on the second area, the A region includes a grip having a first cross-sectional area that is less than an area of the second cross-section of the second region, the first cross-section being parallel to the second cross-section.
The oscillating power tool according to claim 1, wherein the outer contour of the stator of the motor is composed of a pair of straight sides and a pair of circular sides connected to the straight sides.
The oscillating power tool according to claim 3, wherein an outer contour of the stator is symmetrical with respect to the first center line and the second center line, and a length of the straight side in a direction parallel to the first center line is larger than an arc The length of the side in the direction parallel to the second centerline.
The oscillating power tool according to claim 3, wherein the oscillating power tool further comprises a brush, the brush being disposed in a direction at an acute or obtuse angle with the straight side.
The oscillating power tool according to claim 1, wherein the outer diameter of the motor ranges from 46 mm to 48 mm.
The oscillating power tool according to claim 6, wherein the motor has an outer diameter of 46 mm.
The oscillating power tool according to claim 6, wherein the motor has a stack length ranging from 45 mm to 75 mm.
The oscillating power tool according to claim 8, wherein the motor has a stack length of 60 mm.
The oscillating power tool according to claim 1, wherein the power of the motor ranges from 400 W to 450 W.
The oscillating power tool according to claim 1, wherein the housing is provided with a grip portion, and the circumference of the grip portion ranges from 135 mm to 175 mm.
The oscillating power tool according to any one of claims 1 to 11, wherein the housing comprises an outer casing and an inner casing;

The outer casing is disposed on an outer side of the inner casing;

The motor, the transmission mechanism and the output shaft are all located in the inner casing.
The oscillating power tool according to claim 12, wherein the inner casing comprises a motor casing and a head casing;

The output shaft and the transmission mechanism are located in the head case, and the motor is located in the motor case.
The oscillating power tool according to claim 13, further comprising a damping element;

The damping element is disposed between the head shell and the outer casing;

And/or, the damping element is disposed between the motor casing and the outer casing;

And the damping element is a vibration damping block, a vibration damping pad or a vibration damping ring.
The oscillating power tool according to claim 1, wherein said motor drives the motor shaft to rotate, and the transmission mechanism drives the output shaft to swing about its own axis.