WO2017121366A1

WO2017121366A1 - Power tool

Info

Publication number: WO2017121366A1
Application number: PCT/CN2017/071045
Authority: WO
Inventors: 钟红风; 吴宇; 孙益民
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2016-01-14
Filing date: 2017-01-13
Publication date: 2017-07-20
Also published as: EP3403771A4; EP3403771A1; CN106965132A

Abstract

A power tool comprises: a motor (48); an output shaft (34) driven by the motor (48) for installing a working head, a reference plane being defined as a plane through which an axial line of the motor (48) and an axial line of the output shaft (34) pass; a housing (32), comprising an inner housing (38) and an outer housing (40), the inner housing (38) and the outer housing (40) disposed to be spaced apart, the inner housing (38) at least partially accommodating the motor (48); a limiting mechanism and a damping mechanism acting in a direction vertical to the reference plane, both disposed between the outer housing (40) and the inner housing (38), the limiting mechanism being used to limit the movement of the outer housing (40) relative to the inner housing in the reference plane or a plane parallel to the reference plane, and the limiting mechanism and the damping mechanism being disposed independently and opposing to each other. The present invention disposes a limiting mechanism and a damping mechanism opposing to each other in a power tool, thus effectively improving comfort of operation without affecting working efficiency.

Description

Power tool

Technical field

The invention relates to a power tool.

Background technique

Power tools such as swing power tools. The oscillating power tool generally includes a housing, a motor housed in the housing, an output shaft for mounting the working head, and an eccentric transmission mechanism connected between the motor and the output shaft, and the eccentric transmission mechanism converts the rotational motion of the motor shaft into an output shaft Swing motion around its own axis. In this way, after the free end of the output shaft is connected with different accessory working heads, such as a straight saw blade, a circular saw blade, a triangular sanding disc, etc., the swinging power tool can realize various operations such as sawing, cutting, grinding, scraping, etc. To adapt to different job needs.

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

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

Summary of the invention

It is an object of the present invention to provide a power tool that is comfortable to operate and has high work efficiency.

In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a power tool comprising: a motor; an output shaft driven by the motor for mounting a working head, defining an axis passing through the motor and the output shaft The plane of the axis is a reference plane; the housing includes an inner casing and an outer casing, the inner casing and the outer casing being spaced apart, the inner casing at least partially receiving the motor; And a limiting mechanism disposed between the inner casing and a damping mechanism acting in a direction perpendicular to the reference plane, the limiting mechanism for defining the outer casing at the reference plane or parallel to the The inner surface of the reference plane moves relative to the inner casing, and the limiting mechanism and the damper mechanism are relatively independently disposed.

In order to solve the above technical problem, another technical solution adopted by the present invention is as follows: a power tool comprising: a motor; an output shaft driven by the motor for mounting a working head; a housing including an inner casing and an outer casing The inner casing and the outer casing are spaced apart, the inner casing at least partially receiving the motor, the outer casing having a longitudinally extending axis defining an axis passing through the output shaft and the longitudinally extending axis a plane is an intermediate plane; a limiting mechanism and a damping mechanism acting in a direction perpendicular to the intermediate plane are disposed between the outer casing and the inner casing, and the limiting mechanism includes a limiting damping member, The damper mechanism includes a damper damper, the damper damper and the limit The position damping members are set separately.

In order to solve the above technical problem, another technical solution adopted by the present invention is as follows: a power tool comprising: a motor; an output shaft driven by the motor for mounting a working head; a housing including an inner casing and an outer casing The inner casing and the outer casing are spaced apart, the inner casing at least partially receiving the motor, the outer casing having a longitudinally extending axis defining an axis passing through the output shaft and the longitudinally extending axis a plane is an intermediate plane; a limiting mechanism and a damping mechanism acting in a direction perpendicular to the intermediate plane are provided between the outer casing and the inner casing, the limiting mechanism for defining the outer casing The body moves relative to the inner casing in a plane of the intermediate plane or parallel to the intermediate plane, and the limiting mechanism and the damping mechanism are relatively independently disposed.

In order to solve the above technical problem, another technical solution adopted by the present invention is as follows: a power tool comprising: a motor; an output shaft for driving a working head driven by the motor, the motor driving the output shaft around The axis performs a reciprocating oscillating motion, defining a plane formed by the movement of the working head as a working plane; the housing includes an inner casing and an outer casing, the inner casing and the outer casing being spaced apart, the inner casing being at least Partially accommodating the motor; a limiting mechanism and a damper mechanism acting parallel to the working plane are disposed between the outer casing and the inner casing, and the limiting mechanism and the damper mechanism are opposite Independent setting.

In order to solve the above technical problem, another technical solution adopted by the present invention is as follows: a power tool comprising: a motor; an output shaft for mounting a working head, the output shaft surrounding the output shaft driven by the motor The axis swings, a plane defining an axis perpendicular to the output shaft is an oscillating plane; the housing includes an inner casing and an outer casing, the inner casing and the outer casing being spaced apart, the inner casing being at least Partially accommodating the motor; a limiting mechanism is disposed between the outer casing and the inner casing; and a damping mechanism is disposed parallel to the swinging plane, the limiting mechanism is configured to be perpendicular to the swinging The plane that is planar and parallel to the axis of the output shaft defines movement of the outer casing relative to the inner casing, and the limit mechanism and the damper mechanism are relatively independently disposed.

Preferably, the limiting mechanism comprises a limiting damping member, and the damping mechanism comprises a damping damping member, wherein the material of the limiting damping member is different from the damping damping member.

Preferably, the limiting mechanism comprises a limiting damping member, and the damping mechanism comprises a damping damping member, wherein at least one of the shape and the size of the limiting damping member is different from the damping damping member.

Preferably, the limiting mechanism comprises a limiting damping member, and the damping mechanism comprises a damping damping member, wherein the limiting damping member has a density different from the damping damping member.

Preferably, the vibration damping member is disposed between an outer surface of the inner casing and an inner surface of the outer casing.

Preferably, the damping damper is directly connected to an outer surface of the inner casing.

Preferably, the damping damper is directly connected to an inner surface of the outer casing.

Preferably, the support surface formed by the inner surface of the outer casing contacting the vibration damping damper is substantially convex; and the support surface formed by the outer surface of the inner casing contacting the vibration damping damper is substantially planar.

Preferably, the limiting mechanism includes a limiting member, a limiting slot matched with the limiting member, and a limiting damping member disposed between the limiting member and the limiting slot, wherein the limiting member is disposed On one of the outer casing and the inner casing; the limiting groove is disposed on one of the outer casing and the inner casing.

Preferably, the limiting member is a cylindrical pin.

Preferably, in the axial direction of the cylindrical pin, the length of the limiting damper is not greater than the depth of the limiting groove.

Preferably, the limiting damper is provided with a through hole through which the cylindrical pin passes.

Preferably, the inner casing includes a head casing at least partially accommodating the output shaft, and a motor casing connected to the head casing, and the limiting mechanism and the damper mechanism are disposed on the head casing and the Between the outer casings.

Preferably, the limiting mechanism and the damping mechanism are disposed between the motor casing and the outer casing.

Preferably, the limiting mechanism comprises a limiting damping member, and the damping mechanism comprises two damping damping members, and the limiting damping member is disposed between the two damping damping members.

Preferably, the two damping dampers and the limiting damper are sequentially disposed along an axial direction of the output shaft.

Preferably, the limiting mechanism is configured to define movement of the outer casing relative to the inner casing in a plane of the reference plane or parallel to the reference plane.

In the power tool of the invention, the limiting mechanism and the damping mechanism are relatively independently arranged, and the most suitable material, shape, size, material, etc. can be selected according to the respective characteristics. This ensures the damping effect and does not affect the work efficiency. Moreover, the position setting mechanism and the damping mechanism are flexible in setting, the whole machine is compact in structure and the man-machine is better.

DRAWINGS

The objects, technical solutions, and advantageous effects of the present invention described above can be achieved by the following figures:

Fig. 1 is a front elevational view showing a swinging power tool according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing the swinging power tool of FIG. 1 with half of the outer casing removed.

Figure 3 is a partial perspective view of the oscillating power tool of Figure 1.

4 is a partial exploded perspective view of the oscillating power tool of FIG. 1.

Figure 5 is a cross-sectional view taken along line A-A of Figure 1.

Fig. 6 is a schematic view showing the swinging power tool of the second embodiment of the present invention concealing half of the outer casing.

Figure 7 is a partial exploded perspective view of the oscillating power tool of Figure 6.

Figure 8 is a cross-sectional view of the oscillating power tool of Figure 6.

Fig. 9 is a cross-sectional view showing a swing power tool according to a third embodiment of the present invention.

Fig. 10 is a schematic view showing the swinging power tool of the fourth embodiment of the present invention concealing half of the outer casing.

Figure 11 is a partial perspective exploded view of the oscillating power tool shown in Figure 10.

Figure 12 is a cross-sectional view of the oscillating power tool shown in Figure 10.

detailed description

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

In the present embodiment, the creative concept of the present invention is exemplified by a swinging power tool, which is also referred to as a swinging power tool. However, the power tool of the present invention is not limited to the oscillating power tool, and may be a rotary power tool such as a sander or an angle grinder or the like.

1 to 5 show a first embodiment of the present invention.

Referring to FIG. 1, the oscillating power tool 100 includes a housing 32, an output shaft 34 extending from the interior of the housing 32, a working head (not shown) mounted at the end of the output shaft 34, and an axial direction at the output shaft. The clamping assembly 36 of the working head is clamped in direction 33. The axial direction 33 extends generally parallel to the axis Y of the output shaft 34.

The housing 32 includes an inner housing 38 and an outer housing 40 that are spaced apart. The outer casing 40 extends substantially in a straight line. The longitudinal extension axis of the outer casing 40 is X1, and the inner casing 38 portion is bent from one end of the outer casing 40 to the outer casing 40. The outer casing 40 has a grip area 42 that the user grips during the guiding of the tool.

The plane defining the longitudinal extension axis X1 of the outer casing 40 and the axis Y of the output shaft is an intermediate plane, that is, when the longitudinally extending axis X1 of the outer casing 40 is coplanar with the axis Y of the output shaft, forming an intermediate plane. In the present embodiment, the longitudinally extending axis X1 of the outer casing 40 is substantially perpendicular to the axis Y of the output shaft. It will be appreciated by those skilled in the art that the longitudinal extension axis X1 of the outer casing 40 and the axis Y of the output shaft may also be non-coplanar, or coplanar but not perpendicular, as the longitudinal extension axis X1 of the outer casing 40 is parallel to the axis Y of the output shaft. Or at other angles.

Referring to FIG. 2, the inner casing 38 includes a head casing 44 that at least partially houses the output shaft 34, and a motor casing 46 that is coupled to the head casing 44. Motor housing 46 is used to mount motor 48, motor 46 has motor shaft 47 (can be See Figure 3). The motor housing 46 can be designed to partially or completely enclose the motor 48 as desired. In the present example, the head case 44 is made of metal and the motor case 46 is made of plastic. Of course, the head case 44 and the motor case 46 may be made of metal or plastic as needed. The motor casing 46 in this embodiment is composed of two parts, which are respectively disposed at both ends of the motor 48 and partially enclose the motor 48, and the intermediate portion of the motor 48 is not covered in the motor casing 46. The motor casing 46 can also be constructed in one piece, in which case it can completely enclose the motor 48.

Referring to Fig. 3, an eccentric transmission mechanism 50 is provided between the motor shaft 47 and the output shaft 34, and the rotational motion of the motor 48 about its own axis X2 is converted into an oscillating motion of the output shaft 34 about its own axis Y by the eccentric transmission mechanism 50, and is swung. The direction is shown by the arrow RR in the figure. When the free end of the output shaft 34 is connected to a different working head attachment, such as a straight saw blade, a circular saw blade, a triangular sanding disc, etc., cutting or grinding operations can be realized.

The plane defining the axis X2 of the motor and the axis Y of the output shaft is the reference plane, that is, when the axis X2 of the motor is coplanar with the axis Y of the output shaft, it constitutes a reference plane. In the present embodiment, however, the axis Y of the output shaft is substantially perpendicular to the axis X2 of the motor. It will be appreciated by those skilled in the art that the axis X2 of the motor and the axis Y of the output shaft may also be non-coplanar, or coplanar but not perpendicular, such as the axis X2 of the motor being parallel or at other angles to the axis Y of the output shaft.

Of course, in the present embodiment, the axis X2 of the motor coincides with the longitudinal extension axis X1 of the outer casing 40, and therefore, the reference plane and the intermediate plane coincide.

The plane defined by the movement of the working head is defined as the working plane. Specifically, in the present embodiment, the working head (which may be a straight saw blade, a circular saw blade, etc.) is swung with the output shaft 34 to form an oscillating plane perpendicular to the axis Y of the output shaft. The oscillating plane can be thought of as a plane formed by any one of the straight lines perpendicular to the output shaft 34 on the working head that oscillates with the output shaft 34. Therefore, the oscillating plane is perpendicular to the above-mentioned intermediate plane or reference plane. Of course, those skilled in the art will also appreciate that for a rotary power tool, the working head rotates along the output shaft to form a plane of rotation.

With continued reference to FIG. 3, the eccentric transmission mechanism 50 is disposed within the head housing 44 and includes a shift fork 52 and an eccentric assembly 54 coupled to the motor shaft 47. The eccentric assembly 54 includes an eccentric shaft 56 coupled to the motor shaft 47 and a drive wheel 58 mounted to the eccentric shaft 56. One end of the shift fork 52 is coupled to the top of the output shaft 34 and the other end is coupled to the drive wheel 58 of the eccentric assembly 54. The shift fork 52 includes a sleeve 60 that is sleeved on the output shaft 34 and a fork 62 that extends horizontally from the top end of the sleeve 60 toward the motor shaft 47. In the present embodiment, the drive wheel 58 is a ball bearing having a spherical outer surface that mates with the fork portion 62 of the shift fork 52. The eccentric shaft 56 is eccentrically coupled to the motor shaft 47, that is, the axis X3 of the eccentric shaft 56 does not coincide with the axis X1 of the motor shaft 47, and is radially offset by a certain distance. Fork 52 The forks 62 are wrapped around the sides of the drive wheel 58 and are in sliding contact with the outer surface of the drive wheel 58.

When the motor 48 drives the motor shaft 47 to rotate, the eccentric shaft 56 is eccentrically rotated with respect to the axis X2 of the motor by the motor shaft 47, thereby driving the driving wheel 58 to rotate eccentrically with respect to the axis X2 of the motor. Driven by the drive wheel 58, the shift fork 52 swings about the axis Y of the output shaft to further oscillate the output shaft 34 about its own axis Y. The output shaft 34 swings to drive the working head mounted thereon to swing the workpiece.

In the present embodiment, the swing angle of the output shaft 34 is 5°. The output shaft 34 has a swing frequency of 18,000 times per minute. By setting the swing angle of the output shaft to 5°, the working efficiency of the working head is greatly improved, and when the working head is a saw blade, the discharge of debris is facilitated.

It should be noted that, in the oscillating power tool of the present invention, the swing angle of the output shaft 34 is not limited to 5°, and it may be set to a value greater than or less than 5° as needed. The swing frequency of the output shaft 34 is also not limited to 18,000 times per minute, and is preferably greater than 10,000 times per minute.

Since the housing 32 includes an inner housing 38 and an outer housing 40. In order to define movement of the outer casing 40 relative to the inner casing, a limit mechanism is provided between the inner casing 38 and the outer casing 40. The stop mechanism is primarily used to define movement of the outer casing 40 relative to the inner casing 38 in a plane of reference plane and parallel to the reference plane. It should be noted that the definition of the movement of the outer and inner casings herein is not necessarily completely precisely defined in the plane of the reference plane or plane parallel to the reference plane. Due to the complexity of the actual working conditions, the reference plane may be slightly inverted, and the movement limitation of the above-mentioned limiting mechanism to the outer casing and the inner casing also includes a case where the reference plane has a slight inversion. Further, it should be noted that the restricted motion includes movement and rotation in these planes.

In another case, the stop mechanism is primarily used to define movement of the outer casing 40 relative to the inner casing 38 in a plane that is intermediate and parallel to the median plane. It should be noted that the definition of the movement of the outer and inner casings herein is not necessarily completely precisely defined in the plane of the intermediate plane or in a plane parallel to the intermediate plane. Due to the complexity of the actual working conditions, the intermediate plane may also be slightly inverted. The movement restriction of the limiting mechanism to the outer casing and the inner casing also includes a slight inversion of the intermediate plane. Further, it should be noted that the restricted motion includes movement and rotation in these planes.

In another case, the stop mechanism is primarily used to define movement of the outer casing 40 relative to the inner casing 38 in a plane that is perpendicular to the swing plane or the work plane and parallel to the output shaft axis or the longitudinally extending axis of the outer casing 40.

In the present embodiment, between the head case 44 and the outer casing 40, between the motor casing 46 and the outer casing 40 All set a limited mechanism. Of course, the limiting mechanism may also be disposed only between the head shell 44 and the outer casing 40; or between the motor casing 46 and the outer casing 40.

A limiting mechanism is provided on at least one side of the intermediate plane. In the present embodiment, the limit mechanism is symmetrically disposed on both sides of the intermediate plane.

In the following, only the limiting mechanism between the head shell 44 and the outer casing 40 and on the side of the intermediate plane will be specifically described as an example.

Referring to FIG. 4 and FIG. 5 , the limiting mechanism includes a limiting member 64 , a limiting slot 66 matched with the limiting member 64 , and a limiting damping member 68 disposed between the limiting member 64 and the limiting slot 66 . The limiting member 64 is disposed on one of the head case 44 and the outer casing 40; the limiting groove 66 is disposed on the other of the head case 44 and the outer case 40.

In the present embodiment, the limiting member 64 is disposed on the outer casing 40 and extends from the inner surface 70 of the outer casing 40 toward the head casing 44. The limiting member is a cylindrical pin integrally formed on the outer casing 40. Of course, the limiting member can also be fixedly disposed on the inner surface 70 of the outer casing 40.

The limiting slot 66 is disposed on the head shell 44 for receiving the limiting member 64. The limiting member 64 and the limiting groove 66 are circular in shape, and thus can be used for limiting in all directions in the reference plane or the intermediate plane. Similarly, the transmission of vibration or the like can be reduced in each direction in the reference plane or the intermediate plane.

Of course, the shape of the limiting member 64 and the limiting groove 66 is not limited to a circular shape, and may be a polygon, an ellipse or the like. Moreover, the shape of the limiting member can also be different from the shape of the limiting groove.

The limiting damper 68 is provided with a receiving hole 72 which is a cylindrical hole through which the cylindrical pin 64 passes. Of course, the shape of the receiving hole 72 may vary as the shape of the limiting member changes. In this embodiment, the receiving hole 72 is a through hole. Of course, the receiving hole 72 may also have a bottom surface, but the cylindrical pin 64 does not need to be in contact with the bottom surface thereof.

Since the limit damper 68 does not need to provide damping in a direction perpendicular to the intermediate plane or the reference plane. Therefore, the length of the limiting member 68 in the direction perpendicular to the intermediate plane or the reference plane, that is, in its own axial direction, may not be greater than the depth of the limiting slot 66.

During the operation of the oscillating power tool 100, the workpiece exerts a hindrance to the feed of the working head, and then the working head transmits the force to the output shaft, and further transmits from the output shaft to the inner casing 38, and the force passes through the inner and outer casings. The limit damper 68 is transferred to the outer casing 40 and further transferred from the outer casing 40 to the hand of the user holding the oscillating power tool 100. Therefore, the limiting damper 68 adopts a material with a relatively high rigidity to facilitate the improvement of the operating performance of the oscillating power tool, and the user can more easily operate the oscillating power tool to smoothly feed the working head.

The oscillating power tool 100 is a main vibration source in the direction parallel to the oscillating plane during operation. Therefore, a damper mechanism is disposed between the inner casing 38 and the outer casing 40, and the main action direction of the damper mechanism is parallel to the oscillating plane. Or work plane. That is, the damper mechanism mainly acts in a direction perpendicular to the reference plane or the intermediate plane.

By providing the damper mechanism, it is possible to effectively prevent the vibration generated during the operation from being transmitted to the outer casing 40 through the inner casing 38 and then to the grip region 42. The vibration transmitted to the grip area 42 is reduced, the vibration problem of the user during use is greatly improved, and the comfort of the operation is improved.

In the present embodiment, a damper mechanism is provided between the head case 44 and the outer casing 40, and between the motor case 46 and the outer casing 40. Of course, the damper mechanism may also be disposed only between the head case 44 and the outer casing 40; or between the motor case 46 and the outer casing 40.

A damper mechanism is provided on at least one side of the intermediate plane, and in the present embodiment, a damper mechanism is symmetrically disposed on both sides of the intermediate plane.

In the following, only the damper mechanism between the head shell 44 and the outer casing 40 and on the side of the intermediate plane will be specifically described as an example. Referring to FIGS. 4 and 5, the damper mechanism includes a damper damper 76 disposed between the head shell 44 and the outer casing 40.

Specifically, in the present embodiment, the vibration damping member 76 is disposed between the outer surface 74 of the inner casing 38 and the inner surface 70 of the outer casing 40. The number of the damper dampers 76 may be N (N is an integer such as 1, 2, ...), and in the present embodiment, the number of the damper dampers 76 is two.

The vibration damping damper 76 can have a shape suitable for being placed later in a state where it is not placed. For example, the vibration damping member 76 has a rectangular parallelepiped shape in an uninserted state and changes its shape by a pre-stress in the placed state. Therefore, the generation of the pre-stress has a very favorable influence on the inside of the vibration damping member 76. A suitable prestressing is in particular between 20% and 40%, and preferably 35%.

The vibration damping member 76 is coupled to the inner surface 70 of the outer casing 40. The inner surface 70 of the outer casing 40 contacting the vibration damping damper 76 is machined into a support surface which is substantially convex.

The damping damper 76 is coupled to the outer surface 74 of the inner casing 38. The outer surface 74 of the inner casing 38 contacting the vibration damping damper 76 is machined into a support surface which is substantially planar.

Further, the inner surface 70 of the outer casing 40 contacting the vibration damping damper 76 may be processed into a planar shape, and the outer surface 74 of the inner casing 38 contacting the vibration damping damper 76 may be processed into a supporting surface, and the supporting surface is substantially convex. Or the outer surface 74 and the inner surface 70 are both machined into a support surface, and the support surface is planar.

Since the damper mechanism and the limiting mechanism are relatively independently disposed, the damper damper 76 can be directly coupled to the inner surface 70 of the outer casing 40 and the outer surface 74 of the inner casing 38. And the damping damper 76 can be made to fit the outer surface of the inner casing 38 and the inner surface of the outer casing 40 as needed. Any shape.

In the present embodiment, the vibration damping member 76 is a rectangular parallelepiped in an uninserted state, and its shape is changed by the prestressing force after being placed, and the surface in contact with the inner surface 70 of the outer casing 40 is changed. It is concave. Of course, the limiting mechanism is mainly used to limit the movement of the outer casing 40 relative to the inner casing 38 in the reference plane or the intermediate plane; and the damping mechanism mainly acts in a direction perpendicular to the reference plane or the intermediate plane. Therefore, the damping mechanism and the limiting mechanism are relatively independently arranged. For example, the damping mechanism and the limiting mechanism can be arranged adjacent or separately. Thus, the shape, size, and material of the damping damper 76 and the limiting damper 68 can be selected as appropriate according to their respective roles. Therefore, the vibration damping effect is ensured, and the work efficiency is not affected.

The damping mechanism and the limiting mechanism are relatively independent. Therefore, the damper mechanism is provided on at least one side of the intermediate plane; when both sides are arranged, the symmetrical setting can be selected, and of course, the setting can be staggered. The position setting of the limiting mechanism is more flexible, and it can be arranged on one side or both sides of the intermediate plane like the damping mechanism; more flexiblely, the limiting mechanism can also be partially located in the intermediate plane. Therefore, the specific setting can be set according to the specific shape of the swinging power tool 100, and the diameter of the grip area 42 can be reduced, the structure is more compact, and the grip is convenient.

Referring again to FIGS. 4 and 5, it is also exemplified between the head case 44 and the outer casing 40 and on the side of the intermediate plane. In this embodiment, the damper mechanism and the limit mechanism are disposed adjacent to each other. The damper mechanism includes two damper dampers 76, and the limit damper 68 of the limiting mechanism is disposed between the two damper dampers 76. The two damping dampers 76 and the limiting dampers 68 are sequentially disposed in the axial direction 33 of the output shaft. The two damping dampers 76 are symmetrically disposed with respect to the limit damper 68, and the lines of the centers of the three extend in the axial direction 33 of the output shaft.

The damping damper 76 and the limiting damper 68 are disposed separately, and the two do not interfere with each other. Specifically, referring to FIG. 4, the damping damper 76 and the limiting damper 68 are spaced apart from the outer wall 80 (a portion of the head casing 44) of the limiting slot 66. The vibration damping member 76 is spaced apart from the outer wall 80 of the limiting groove 66 by a certain distance. Of course, the damping damper 76 can also be in contact with the outer wall 80.

Both the vibration damping member 76 and the limit damping member 68 have a certain elasticity, and polyurethane (PU), ethylene propylene diene (EPDM), polypropylene (EPP), rubber, a mixture thereof and the like are used. The use of these materials between the inner casing 38 and the outer casing 40, in conjunction with appropriate pre-stressing, improves the comfort of operation while the user holds the gripping area 42 to guide the tool.

In the present embodiment, both the damper damper 76 and the limit damper 68 are preferably polyurethane (PU). Of course, the damping damper 76 and the limiting damper 68 can also use different materials. For example, the damping damper 76 uses polyurethane (PU), and the limiting damper 68 uses polypropylene (EPP) or the like.

The damping damper 76 and the limiting damper 68 use polyurethane (PU), and the density is generally 0.3 to 0.8 g/cm3. The vibration damping member 76 is preferably 0.45 to 0.55 g/cm3, and the limiting damper 68 is preferably 0.6 to 0.7 g/cm3. Therefore, the damping damper 76 and the limiting damper 68 may have the same density, but may be different. Preferably, the material density of the damping damper 76 is less than the material density of the limiting damper 68.

Moreover, since the vibration damping member 76 and the limit damping member 68 are separately provided. Therefore, the vibration damping member 76 and the limit damping member 68 can be the same or different in shape, size, or number as needed.

As in the present embodiment, in a state where the outer surface 74 of the inner casing 38 and the inner surface 70 of the outer casing 40 are not inserted, the vibration damping member 76 is substantially rectangular, and after being placed, the outer casing The side of the inner surface 70 of the body 40 that is in contact with each other is substantially concave. The limit damper 68 is substantially cylindrical in a state where it is not placed and placed. And its size and number are also different. Of course, the shape and the number of the damping damper 76 and the limiting damper 68 are not limited to the embodiment, and may be set according to a specific space.

In the present embodiment, the two damping dampers 76 are disposed at a distance, thus increasing the span of the damper mechanism in the axial direction 33 of the output shaft. The larger the span, not only improves the damping effect, but also allows the damping mechanism to have sufficient support for the head shell 44 in the axial direction 33 of the output shaft, and the angle of movement of the head shell 44 relative to the outer casing 40 is small, significantly avoiding The work efficiency has dropped.

Preferably, the maximum length of the head shell 44 for accommodating the partial output shaft 34 in the axial direction 33 of the output shaft is L, and the two farthest points of the two damping dampers 76 along the axial direction 33 of the output shaft. The distance L1 (span) is greater than or equal to 0.2L and less than or equal to 0.8L. Preferably, the distance L1 between the two farthest points of the two damping dampers 76 along the axial direction 33 of the output shaft is greater than or equal to 0.4L and less than or equal to 0.7L. Preferably, the distance L1 between the two farthest points of the two damping dampers 76 along the axial direction 33 of the output shaft is 0.5 L or 0.6 L.

Of course, the total length L2 of the two damping dampers 76 along the axial direction 33 of the output shaft is greater than or equal to 0.2 L and less than or equal to 0.8 L, and the vibration damping effect is also good and the work efficiency is significantly prevented. Preferably, the total length L2 of the two damping dampers 76 along the axial direction 33 of the output shaft is greater than or equal to 0.3 L and less than or equal to 0.6 L. Preferably, the total length L2 of the two damping dampers 76 along the axial direction 33 of the output shaft is 0.4 L or 0.5 L.

Referring to FIG. 2 again, in the embodiment, the damper mechanism and the limiting mechanism disposed between the motor casing 46 and the outer casing 40 are substantially the same as the damper mechanism and the limiting mechanism disposed between the head casing 44 and the outer casing. The point is that the center of the two damping dampers 76 and the center line of the limit damper 68 are not in the same straight line, and the three center lines constitute a triangle. This arrangement also guarantees vibration reduction The effect will not affect the work efficiency. In addition, the damping damper 76 may also be different from the rectangular parallelepiped shape in the head casing 44, such as cutting off one or more corners and the like. It can be seen that the position of the damping damper 76 and the limiting damper 68 is flexible, and can be set according to the specific shape of the oscillating power tool 100, and the structure is more compact.

6 to 8 show a second embodiment of the present invention.

Referring to Figures 6-8, this embodiment is substantially similar to the first embodiment. In the present embodiment, the oscillating power tool 200 and its overall layout and limit mechanism are the same, except for the setting of the damper mechanism. In the present embodiment, a damper mechanism is provided between the head case 244 and the outer casing 240, and a damper mechanism is also provided between the motor case 246 and the outer casing 240. Further, on both sides of the intermediate plane, a damper mechanism is symmetrically disposed.

Hereinafter, the damper mechanism between the head case 244 and the outer casing 240 and located on the side of the intermediate plane will be described as an example. The damper mechanism includes a damper damper 276. The vibration damping member 276 has a substantially annular cylindrical structure, and the two bottom surfaces of the cylinder are the first bottom surface 231a and the second bottom surface 231b of the vibration damping member 276. The vibration damping damper 276 includes an inner bore 277 having a generally cylindrical shape and having an inner bore wall.

Further, the damping damper 276 is sleeved on the outer wall 280 of the limiting slot 266. Specifically, the inner wall of the damper damper 276 is matched with the outer wall 280 of the limiting groove 266, thereby limiting the relative positional relationship between the damper damper 276 and the head shell 244, and avoiding the damper power of the damper damper 276. During the operation of the tool 200, it is shifted to other positions due to the repeated action of the vibration.

Further, the first bottom surface 231a of the vibration damping member 276 abuts the head shell 244, and the second bottom surface 231b of the vibration damping member 276 abuts against the outer casing 240. More specifically, the first bottom surface 231a abuts the outer surface 274 of the head shell 244, and the second bottom surface 231b abuts the inner surface 270 of the outer casing 240. Preferably, the portion where the outer surface 274 and the first bottom surface 231a abut each other is planar, and the portion where the inner surface 270 and the second bottom surface 231a abut also has a planar shape. More preferably, the damping damper 276 and the inner surface 270 of the outer casing 240 are relatively freely disposed so as not to limit the relative positional relationship between the damper damper 276 and the outer casing 240. With this arrangement, during the operation of the oscillating power tool 200, the force of the damper damper 276 in a direction other than the direction perpendicular to the intermediate plane can be reduced, thereby mitigating the fatigue failure of the damper damper 276, and improving the damper damper The service life of 276.

Fig. 9 shows a third embodiment of the present invention and is a modification based on the second embodiment. In the present embodiment, the inner portion of the limiting groove 366 has a stepped surface 367, that is, the inner wall of the limiting groove 366 is divided into two segments having different inner diameters. Further, the inner wall of the limiting groove 366 is smaller than the inner diameter of the inner portion of the outer casing 344, and the inner diameter of the inner portion of the outer casing 340 is larger. Further, the limit damper 368 is set In the limiting slot 336 is adjacent to a section of the outer casing 340. The limiting damper 368 has a substantially annular cylindrical shape with a through receiving hole therebetween, and the receiving hole has a substantially cylindrical shape. Further, the limiting member 364 disposed on the outer casing 340 also has a substantially cylindrical shape protruding from the inner surface 370 of the outer casing 340. After the assembly, the limiting member 364 is matched into the receiving hole of the limiting damper 368. Specifically, the limiting member 364 completely penetrates the receiving hole of the limiting damper 368.

10 to 12 show a fourth embodiment of the present invention.

Referring to Figures 10-12, this embodiment is substantially similar to the first embodiment. In the present embodiment, the oscillating power tool 400 and its overall layout are the same. In the present embodiment, a damper mechanism and a limit mechanism are provided between the head case 444 and the outer casing 440. Further, on both sides of the intermediate plane, a damper mechanism is symmetrically disposed.

Hereinafter, the damper mechanism between the head case 444 and the outer casing 440 and located on the side of the intermediate plane will be described as an example. The damper mechanism includes a damper damper 476. Damping damper 476 is disposed between outer surface 474 of head shell 444 and inner surface 470 of outer casing 440. Specifically, the head shell 444 is provided with a flange 475 protruding from the outer surface 474. The flange 475 encloses a receiving space on the outer surface 474 of the head shell 444. Preferably, the flange 475 and the receiving space are respectively provided in two in the axial direction. Preferably, the damping damper 476 includes two damper portions 479. The two damper portions 479 are spaced apart in the axial direction and connected by a connecting portion 481. Further, the two damper portions 479 are respectively disposed in the two accommodating spaces. In this way, the length requirement of the damping damper in the axial direction can be satisfied, and the two damping dampers are not required to be installed, which simplifies the assembly process. Further, the damping damper 476 and the inner surface 470 of the outer casing 440 abut each other in a plane, and the two are relatively freely arranged, so that the relative positional relationship between the damper damper 476 and the outer casing 440 is not limited. This arrangement is also to increase the service life of the vibration damping member 476.

Further, a limit mechanism is also disposed between the head case 444 and the outer casing 440. The longitudinal extension axis of the outer casing 440 is X1 and the axis of the output shaft is Y. The longitudinally extending axis X1 of the outer casing and the axis Y of the output shaft are perpendicular to each other. A plane perpendicular to the output shaft axis and passing the longitudinally extending axis X1 is a transverse plane. In the present embodiment, the limit mechanism is symmetrically disposed on both sides of the lateral plane. The following is an example of a limiting mechanism between the head shell 444 and the outer casing 440 and located on one side of the lateral plane. The limiting mechanism includes a limit damper 468. The limit damper 468 has a cylindrical structure with a substantially U-shaped cross section. The U-shaped cylinder structure of the limit damper 468 extends in a direction perpendicular to the median plane. The recessed portion of the U-shaped cylinder structure of the limit damper 468 is disposed toward the outer casing 440. A limiting member 464 is disposed on the outer casing 440. The limiting member 464 is outwardly convex from the inner surface 470 of the outer casing 440 for mating with the recessed portion of the limiting damper 468. A limited position is also set on the head shell 444 Slot 466. The limit damper 464 is snapped into the limiting slot 466. The limit damper 464, the limiting groove 466 and the limiting member 464 cooperate with each other to restrict the movement of the inner and outer casings in the longitudinal extension axis X1 direction and the output shaft axis Y direction. The limiting mechanism is arranged such that its length in the direction of the vertical median plane is longer, so that the limiting effect of the limiting damper is better.

The limiting action of the limiting mechanism in the second to fourth embodiments described above on the relative movement between the inner and outer casings is the same as in the first embodiment, and therefore, if a relatively rigid material is used, the oscillating power tool can be made The improved operation performance makes it easier for the user to operate the oscillating power tool to make the working head smoothly feed. The damping mechanism can also provide the same direction of damping force as the damping mechanism of the first embodiment, that is, the direction of action of the damping mechanism is the same as the direction of action of the damping mechanism in the first embodiment. Therefore, it is possible to effectively reduce the vibration of the oscillating power tool in its swing direction.

In the above embodiment, the limiting mechanism and the damper mechanism are relatively independently disposed. Thus, the shape, size, material, number, and the like of the damping damper and the limiting damper can be selected as appropriate according to their respective roles. Therefore, the vibration damping effect is ensured, and the work efficiency is not affected. Moreover, the position setting of the damping damper and the limiting damper is also more flexible, and the oscillating power tool has a more compact structure and a better man-machine.

The present invention is not limited to the embodiments in the foregoing embodiments, and other changes may be made by those skilled in the art in light of the spirit of the present invention. However, as long as the functions implemented are the same or similar to the present invention, they should be covered. Within the scope of the invention.

Claims

A power tool that includes:

motor;

Driving an output shaft for mounting the working head by the motor, defining a plane passing through an axis of the motor and an axis of the output shaft as a reference plane;

a housing comprising an inner housing and an outer housing, the inner housing and the outer housing being spaced apart, the inner housing at least partially receiving the motor;

The utility model is characterized in that: a limiting mechanism and a damping mechanism acting in a direction perpendicular to the reference plane are arranged between the outer casing and the inner casing, the limiting mechanism for defining the outer casing The reference plane or the plane parallel to the reference plane moves relative to the inner casing, and the limiting mechanism and the damper mechanism are relatively independently disposed.
The power tool according to claim 1, wherein said limiting mechanism comprises a limiting damper, said damper mechanism comprising a damper damper, wherein a material of said limiting damper is different from said reducing Vibration damping member.
A power tool according to claim 1, wherein said limiting mechanism includes a limit damper member, said damper mechanism comprising a damper damper, wherein said limit damper has at least one of a shape and a size Different from the damping damper.
A power tool according to claim 1, wherein said position limiting mechanism includes a limit damper member, said damper mechanism comprising a damper damper, wherein said limit damper member has a density different from said damper Vibration damping member.
A power tool according to any one of claims 2 to 4, wherein said vibration damping member is disposed between an outer surface of said inner casing and an inner surface of said outer casing.
A power tool according to claim 5, wherein said vibration damping member is directly coupled to an outer surface of said inner casing.
The power tool according to claim 6, wherein said vibration damping member is directly coupled to an inner surface of said outer casing.
The power tool according to claim 1, wherein the limiting mechanism comprises a limiting member, a limiting slot matched with the limiting member, and a limit disposed between the limiting member and the limiting slot. a position damping member, wherein the limiting member is disposed on one of the outer casing and the inner casing; the limiting groove is disposed on one of the outer casing and the inner casing.
The power tool according to claim 8, wherein said limiting member is a cylindrical pin.
The power tool according to claim 9, wherein in the axial direction of the cylindrical pin, the length of the limiting damper is not greater than the depth of the limiting groove.
The power tool according to claim 9, wherein said limit damper member is provided with a through hole through which said cylindrical pin passes.
A power tool according to claim 1 wherein said inner casing includes a head casing at least partially receiving said output shaft, a motor casing coupled to said head casing, said limiting mechanism and said reducing A vibrating mechanism is disposed between the head case and the outer casing.
A power tool according to claim 12, wherein said stopper mechanism and said damper mechanism are disposed between said motor casing and said outer casing.
A power tool that includes:

motor;

Driving an output shaft for mounting the working head by the motor;

a housing comprising an inner housing and an outer housing, the inner housing and the outer housing being spaced apart, the inner housing at least partially receiving the motor, the outer housing having a longitudinally extending axis, defined by the The axis of the output shaft and the plane of the longitudinally extending axis are intermediate planes;

The utility model is characterized in that: a limiting mechanism and a damping mechanism acting in a direction perpendicular to the intermediate plane are arranged between the outer casing and the inner casing, the limiting mechanism comprising a limiting damping member, The damper mechanism includes a damper damper, and the damper damper and the limit damper are separately disposed.
A power tool according to claim 14 wherein said stop mechanism is adapted to define movement of said outer casing relative to said inner casing in a plane of said intermediate plane or parallel to said intermediate plane.
A power tool that includes:

motor;

Driving an output shaft for mounting the working head by the motor;

a housing comprising an inner housing and an outer housing, the inner housing and the outer housing being spaced apart, the inner housing at least partially receiving the motor, the outer housing having a longitudinally extending axis, defined by the The axis of the output shaft and the plane of the longitudinally extending axis are intermediate planes;

The invention is characterized in that: a limiting mechanism and a damping mechanism acting in a direction perpendicular to the intermediate plane are provided between the outer casing and the inner casing, the limiting mechanism for defining the outer casing The intermediate plane or the plane parallel to the intermediate plane moves relative to the inner casing, and the limiting mechanism and the damping mechanism are relatively independently disposed.
A power tool that includes:

motor;

Driving, by the motor, an output shaft for mounting a working head, the motor driving the output shaft to make a reciprocating oscillating motion about its axis, and defining a plane formed by the movement of the working head as a working plane;

a housing comprising an inner housing and an outer housing, the inner housing and the outer housing being spaced apart, the inner housing at least partially receiving the motor;

The utility model is characterized in that: a limiting mechanism and a damping mechanism acting parallel to the working plane are arranged between the outer casing and the inner casing, and the limiting mechanism and the damping mechanism are relatively independently arranged .
A power tool that includes:

motor;

An output shaft for mounting a working head, the output shaft is oscillated about an axis of the output shaft driven by the motor, and a plane defining an axis perpendicular to the output shaft is an oscillating plane;

a housing comprising an inner housing and an outer housing, the inner housing and the outer housing being spaced apart, the inner housing at least partially receiving the motor;

The utility model is characterized in that: a limiting mechanism is arranged between the outer casing body and the inner casing and a damping mechanism acting parallel to the swinging plane, the limiting mechanism is for perpendicular to the swinging plane and The outer casing is moved relative to the inner casing in a plane parallel to the axis of the output shaft, and the limiting mechanism and the damper mechanism are relatively independently disposed.