CN207273155U

CN207273155U - Power tool

Info

Publication number: CN207273155U
Application number: CN201721114747.5U
Authority: CN
Inventors: 张锐
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2017-08-31
Filing date: 2017-08-31
Publication date: 2018-04-27
Anticipated expiration: 2027-08-31

Abstract

The utility model discloses a kind of power tool, including：Housing, motor, output shaft, working head, transmission component, auxiliary handle and damping assembly, housing is formed with the main handle for being gripped for user, motor is arranged in housing, motor also has drive shaft, working head has output shaft and the grinding being connected on output shaft, and output shaft is driven by motor, and auxiliary handle front end is installed to housing at working head, auxiliary handle includes the grip part extended along a center line, and damping assembly includes mass member and flexible member；Wherein, auxiliary handle further includes the end cap for the rear end for being arranged on grip part, and rear end opposed front end is away from housing, around formed with the accommodating chamber for accommodating damping assembly when end cap is combined with grip part；Flexible member is arranged between mass member and the cavity wall of accommodating chamber；The ratio of rotational frequency W2 when the intrinsic frequency W1 of damping assembly is rotated with output shaft is more than or equal to 0.7 and less than or equal to 1.3.The good damping result of the power tool.

Description

Power tool

Technical field

It the utility model is related to a kind of power tool, and in particular to a kind of angle mill.

Background technology

Power tool is during the work time, it will usually produces larger vibration.Such as angle grind for, be ground with work Part can cause complete machine to produce vibration when contacting, motor and transmission component can also produce vibration in transmission process, furthermore, may Can because grinding concrete structure and installation error when cause grinding rotate when with certain amount of unbalance, the imbalance Amount is so that angle mill further produces larger vibration in operation, these are vibrated so that user is from the operation power work stablized Tool, for this reason, angle mill would generally be provided with auxiliary handle in design on housing, in this way, user can hands grasping power tool To realize relatively stable operation, but because the vibration of power tool is too big, still it cannot be guaranteed that user can be very steady Fixed operation, and vibration can be transferred to user by auxiliary handle, it is easy to cause the discomfort of user's body.

Utility model content

To solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of power work of good damping result Tool.

In order to realize above-mentioned target, the utility model adopts the following technical scheme：

A kind of power tool, including：Housing, motor, working head, transmission component and auxiliary handle, housing formed with In the main handle gripped for user, motor is arranged in housing, and motor also has drive shaft, and working head has output shaft and company The grinding being connected on output shaft, output shaft are driven by motor, and transmission component is used to realize power between drive shaft and output shaft Transmission；Its front end of auxiliary handle is installed to housing at working head, and auxiliary handle includes holding along center line extension Hold portion；Auxiliary handle further includes：Damping assembly, damping assembly include at least one mass member and some flexible members；Wherein, it is auxiliary Help handle to further include the end cap for the rear end for being arranged on grip part, rear end opposed front end further from housing, in end cap formed with for Accommodate the accommodating chamber of at least part damping assembly；Flexible member is arranged between mass member and the cavity wall of accommodating chamber；Damping assembly The ratio of rotational frequency W2 when rotating of intrinsic frequency W1 and output shaft be more than or equal to 0.7 and less than or equal to 1.3.

Further, at least one mass member is arranged on one in the fore-and-aft plane of center line, if dry elasticity is first Be included in part in fore-and-aft plane in the first direction by mass member be connected to the first flexible member group in the accommodating chamber of end cap and The second flexible member group being connected to mass member along the opposite vertical second direction of first direction in the accommodating chamber of end cap.

Further, flexible member is the spring of quality of connection part and auxiliary handle respectively；The number of spring is even number.

Further, even number spring is symmetrical arranged on a symmetrical plane.

Further, the rear end of end cap and grip part forms and is detachably connected.

Further, the cavity wall of accommodating chamber is separately positioned on mass member and accommodating chamber formed with groove, flexible member for both ends Cavity wall between spring, spring is at least partially housed in groove close to one end of the cavity wall of accommodating chamber.

Further, flexible member is separately positioned on the spring between mass member and the cavity wall of accommodating chamber for both ends；Accommodate It is provided with the cavity wall of chamber for pacifying spring-loaded installed part, installed part is formed with mounting post, cavity wall of the spring close to accommodating chamber One end be sleeved on mounting post.

Further, mass member includes：Main part and appendix, main part are connected with flexible member, appendix and main body Portion forms and is detachably connected.

Further, the center line of grip part passes through mass member；Flexible member is separately positioned on mass member and appearance for both ends The spring received between the cavity wall of chamber；In the case where damping assembly is in equilibrium state, spring is put down at one perpendicular to the longitudinal direction of center line Extend in face.

Further, the center line of grip part passes through mass member；Flexible member is the chamber for being arranged on mass member and accommodating chamber Spring between wall, spring extend perpendicularly to center line；The number of spring is 4,4 springs in the circle around center line It is uniformly arranged in circumferential direction.

Further, the axis that the axis of the drive shaft turns of motor is rotated perpendicular to output shaft.

Another power tool, including：Housing, motor, working head, transmission component and auxiliary handle, housing formed with For the main handle gripped for user, motor is arranged in housing, and motor also has a drive shaft, working head have output shaft with The grinding being connected on output shaft, output shaft are driven by motor, and transmission component is used to realize between drive shaft and output shaft dynamic The transmission of power；To housing at working head, auxiliary handle includes extending along a center line the detachable installation of auxiliary handle Grip part；Auxiliary handle further includes：Damping assembly, damping assembly include at least one mass member and some flexible members；Its In, formed with the accommodating chamber for accommodating damping assembly in auxiliary handle；Some flexible members are arranged on mass member and accommodating chamber Cavity wall between；The ratio of rotational frequency W2 when the intrinsic frequency W1 of damping assembly is rotated with output shaft be more than or equal to 0.7 and Less than or equal to 1.3；At least one mass member is arranged on one in the fore-and-aft plane of center line, is wrapped in some flexible members Include in fore-and-aft plane and mass member to be connected to the first flexible member group in accommodating chamber and along opposite first party in the first direction The second flexible member group being connected to mass member to vertical second direction in accommodating chamber.

Further, accommodating chamber has cavity wall, and installation the first flexible member group and second is separately provided at cavity wall The installed part of flexible member group.

Another power tool, including：Housing, motor, working head and auxiliary handle, housing is formed with for for user The main handle gripped, motor are arranged in housing, and working head has output shaft, and output shaft is driven by motor；Auxiliary handle can Detachable is installed to housing at working head；Auxiliary handle further includes：Damping assembly, damping assembly include at least one matter Measure part and some flexible members；Wherein, formed with the accommodating chamber for accommodating damping assembly in auxiliary handle；Some flexible members It is arranged between mass member and the cavity wall of accommodating chamber；Rotational frequency W2 when the intrinsic frequency W1 of damping assembly is rotated with output shaft Ratio be more than or equal to 0.7 and less than or equal to 1.3；Auxiliary handle includes the grip part extended along a center line；At least one matter Amount part is arranged on one in the fore-and-aft plane of center line, is included in some flexible members in fore-and-aft plane along first party To the first flexible member group being connected to mass member in accommodating chamber and along the vertical second direction of opposite first direction by quality Part is connected to the second flexible member group in accommodating chamber.

The utility model is beneficial in that：Damping assembly is arranged in auxiliary handle, so as to reduce power work The vibration of tool, and be avoided that because being transferred to the problem of vibration of user is to cause the discomfort of user's body by auxiliary handle.

Brief description of the drawings

Fig. 1 is the plan of the power tool of first embodiment；

Fig. 2 is that the power tool in Fig. 1 is removing stereogram when being ground；

Fig. 3 is structure chart of the power tool when auxiliary handle is separated with housing in Fig. 2；

Fig. 4 is the stereogram of the part-structure of the auxiliary handle in Fig. 3；

Fig. 5 is explosive view of the auxiliary handle under an angle in Fig. 3；

Fig. 6 is explosive view of the auxiliary handle under another angle in Fig. 3；

Fig. 7 is structure chart of the auxiliary handle when spring directly supports groove in Fig. 3；

Fig. 8 is the plane rough schematic view of the spring and mass member in Fig. 5；

Fig. 9 is the plan of the power tool of second embodiment.

Embodiment

The power tool 100 of first embodiment shown in Fig. 1 is specifically as follows angle mill, and angle mill is polished in installation grinding During operation, may because of grinding concrete structure and installation error when cause grinding rotate when with certain imbalance Amount, the amount of unbalance cause angle mill to produce larger vibration in operation, for this reason, the utility model proposes it is a kind of new dynamic Power instrument 100 can reduce vibration, avoid vibration from being delivered to the discomfort of user's body caused by user and the behaviour to user Make to produce interference.It will be understood, which can also be other instruments suitable for the utility model in essence.

As depicted in figs. 1 and 2, power tool 100 includes：Housing 11, motor 12, working head 13, transmission component and Auxiliary handle 20.Wherein, housing 11 forms the main handle 111 for being used for gripping for user, and for being ground for angle, housing 11 forms master The part of handle 111 is also about formed with the accommodation space for accommodating motor 12, and in other words, motor 12 is arranged on main handle In 111, motor 12 includes being used for the drive shaft 121 for exporting power.Working head 13 is arranged on the end of housing 11, working head 13 include output shaft 131 and the grinding 132 being connected on output shaft 131.Motor 12 is used to drive output shaft 13 with first axle 101 rotate for axis, and the drive shaft 121 of motor 12 can be rotated with second axis 102 for axis.Output shaft 13 is under the driving of motor 12 Power is exported when being rotated with first axle 101 for axis, output shaft 13 can drive working accessory mounted thereto to rotate when rotating, Such as output shaft 13 drives grinding 132 to rotate.Transmission component is used for the transmission that power is realized between motor 12 and output shaft 13. For being ground for angle, the second axis 102 that the first axle 101 of the rotation of output shaft 13 is rotated with drive shaft 121 is mutually perpendicular to, and is This, transmission component can also realize the commutation of power while the transmission of power is realized.Auxiliary handle 20 is removably installed On housing 11, when user grips main handle 111 on the other hand, another hand can grip auxiliary handle 20, be held so as to fulfill both hands Power tool 100 is held, and then can ensure the stability of user's operation.

As shown in Figure 1 to Figure 3, auxiliary handle 20 includes：Grip part 21, connecting portion 22 and end cap 23, wherein, grip part 21 extend along a center line 103, and centered on center line 103, grip part 21 is distinguished along the both ends of center line 103 for grip part 21 For front end 211 and rear end 212,212 opposed front end 211 of rear end is further from housing 11.Before connecting portion 22 is arranged on grip part 21 End 211, connecting portion 22 is used for so that grip part 21 is installed to housing 11 indirectly close to the front end 211 of housing 11.Specifically, even Socket part 22 is threaded post, formed with threaded hole 112 on housing 11, passes through threaded post and the cooperation of threaded hole 112 aids in handle Hand 20 is removably on installation to housing 11.

As shown in Figures 3 to 6, end cap 23 is arranged on the rear end 212 of the remote housing 11 of grip part 21, and end cap 23 is with gripping Accommodating chamber 24 formed with the rear end 212 for being at least partially disposed at grip part 21 when portion 21 combines.In the utility model, handle is aided in Hand 20 further includes damping assembly 25, and damping assembly 25 is used to reduce the vibration that power tool 100 is transferred to user at work.This The power tool of utility model, the ratio of the rotational frequency W2 when intrinsic frequency W1 of its damping assembly 25 is rotated with output shaft 13 More than or equal to 0.7 and less than or equal to 1.3, so when the working head 13 of power tool 100 works, damping assembly 25 can reach To preferable effectiveness in vibration suppression, can specifically address below.

Specifically, end cap 23 is formed with grip part 21 and is detachably connected, such as is threadedly coupled, is snapped connection, Huo Zhetong Screw is crossed so that end cap 23 is detachably connected with the composition of grip part 21.The accommodating chamber 24 that end cap 23 is formed when being combined with grip part 21 A part of 24a formed by grip part 21, another part 24b is formed by end cap 23.

In the embodiment of the utility model, formed with for accommodating damping assembly 25 in the end cap 23 of auxiliary handle 20 Accommodating chamber 24；Can be formed with for accommodating vibration damping group in auxiliary handle 20 in the other embodiments of the utility model The accommodating chamber 24 of part 25, has not limited herein.

In the present embodiment, damping assembly 25 includes mass member 251 and flexible member 252, and flexible member 252 is arranged on matter Measure between part 251 and auxiliary handle 20.Furthermore, flexible member 252 is spring, and the number of spring is even number, such as In the present embodiment, damping assembly 25 includes 4 springs.Accommodating chamber 24 is centered on center line 103, and multiple springs are on a warp The plane for crossing center line 103 is symmetrical arranged.Subtract in this way, multiple springs enable to damping assembly 25 to realize in a plurality of directions Shake.

Center line 103 passes through mass member 251, in other words, on centrally disposed 103 extending direction of line of mass member 251.When When damping assembly 25 is in equilibrium state, spring extends at one in the plane of center line 103 substantially.Multiple springs are also It is uniformly distributed around mass member 251, spring extends perpendicularly to center line 103, and in other words, multiple springs also exist Circumferencial direction around center line 103 is uniformly arranged.For 4 springs in this present embodiment, adjacent two springs Extending direction point-blank extends formed with 90 degree of angle, opposite two springs, such as shown in Fig. 8, spring 252a It is that spring 252b and spring 252d are arranged on second direction i.e. in Y-direction in X-direction in a first direction to be set with spring 252c, Spring 252a and spring 252c is symmetrically arranged on the both sides of mass member 251 in the X direction, and spring 252b and spring 252d are set In the both sides of mass member 251 in the Y direction.Specifically, at one in the fore-and-aft plane of center line 103, some bullets Be included in the first direction mass member 251 is connected in fore-and-aft plane in the accommodating chamber 24 of end cap 23 in property element 252 One flexible member group 252a, 252c and mass member 251 is connected to end cap 23 along opposite first direction vertical second direction The second flexible member group 252b, 252d in accommodating chamber 24.

For stable installation spring, the cavity wall of accommodating chamber 24 is formed with groove 241, and a part of 241a of groove 241 is by gripping The inner wall in portion 21 is formed, and another part 241b of groove 241 is formed by the inner wall of end cap 23, when 21 knot of end cap 23 and grip part During conjunction, a complete groove 241 is formed at the cavity wall of accommodating chamber 24.Certainly, it will be appreciated by those skilled in the art that, groove 241 Structure be not limited thereto.In the present embodiment, damping assembly 25 is further included for pacifying spring-loaded installed part 253, is installed 253 part of part is contained in groove 241, and installed part 253 is also formed with being at least partially disposed at the mounting post in the outside of groove 241 253a, one end of the cavity wall of the close accommodating chamber 24 of spring is sleeved on mounting post 253a, the other end is connected to mass member 251. It will of course be understood that, as shown in fig. 7, spring can also be supported directly in groove 241 close to one end of the cavity wall of accommodating chamber 24 Slot bottom, at this time, spring section are contained in groove 241.

In the present embodiment, the quality of mass member 251 is fixed.In other embodiments, mass member 251 can also be by two Divide and form, mass member 251 can include the main part of quality fixation and the appendix of variable mass, appendix and main part composition It is detachably connected, user can be as needed, replaces the appendix with different quality.

Intrinsic frequency refers to natural angular frequency.When the intrinsic frequency W1 of damping assembly 25 refers to that mass member 251 is vibrated Some direction on fundamental frequency.

In the present embodiment, when flexible member 252 is spring, the intrinsic frequency W1 of damping assembly 25 is mass member 251 Fundamental frequency when being vibrated on the extending direction of spring in this direction.As shown in figure 8, when mass member 251 is in X-direction Upper when vibrating, the fundamental frequency of mass member 251 in the X direction is the intrinsic frequency of the damping assembly 25 of the utility model W1。

Specifically, in the present embodiment, the pass between the intrinsic frequency W1 of damping assembly 25 and spring and mass member 251 It is to be：

Wherein, K is the stiffness coefficient of spring, and M is the quality of mass member 251.

And the relation between the frequency f that the rotational frequency W2 and output shaft 13 of output shaft 13 are rotated is：

The utility model has the intrinsic frequency W1 and output shaft of the damping assembly 25 of the power tool 100 of working head 13 Ratio between 13 rotational frequency W2 is in the section more than or equal to 0.7 and less than or equal to 1.3, its power work to hand-held The damping effect assessment of tool 100 is preferably, that is to say：

It that is to say：

And it is known that for specific power tool 100, the frequency f that output shaft 13 rotates is typically at one In the range of change or be preset as a fixed value, in this way, damping assembly 25 can be set come f according to the frequency of output shaft 13 Intrinsic frequency W1, furthermore, can according to the intrinsic frequency W1 of damping assembly 25 set spring stiffness coefficient K and matter The mass M of part 251 is measured, so as to reach more preferable effectiveness in vibration suppression.

The power tool 200 of second embodiment as shown in Figure 9, the power tool 200 are specifically as follows electric drill, electric drill Auxiliary handle 202 is installed, the concrete structure of the auxiliary handle 202 can be with the auxiliary handle of first embodiment on housing 201 20 concrete structure is identical, specifically repeats no more.

It will of course be understood that, the power tool of the utility model can also be the bigger instrument of other vibrations, such as Sander, electric hammer, impact wrench etc., specifically repeat no more.

The basic principle, main feature and advantage of the utility model has been shown and described above.The technical staff of the industry It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation The technical solution obtained, all falls within the scope of protection of the utility model.

Claims

1. a kind of power tool, including：

Housing, formed with the main handle for being gripped for user；

Motor, is arranged in the housing, and the motor also has drive shaft；

Working head, has output shaft and the grinding being connected on the output shaft, and the output shaft is driven by the motor；

Transmission component, for realizing the transmission of power between the drive shaft and the output shaft；

It is characterized in that：

The power tool further includes：

Auxiliary handle, its front end are installed to the housing at the working head, and the auxiliary handle is included along a center The grip part of line extension；

The auxiliary handle further includes：

Damping assembly, including at least one mass member and some flexible members；

Wherein, the auxiliary handle further includes the end cap for the rear end for being arranged on the grip part, the relatively described front end in the rear end Further from the housing, formed with the accommodating chamber for accommodating at least partly described damping assembly in the end cap；The elasticity Element is arranged between the cavity wall of the mass member and the accommodating chamber；The intrinsic frequency W1 of the damping assembly and the output The ratio of rotational frequency W2 when axis rotates is more than or equal to 0.7 and less than or equal to 1.3.

2. power tool according to claim 1, it is characterised in that：

At least one mass member is arranged on one in the fore-and-aft plane of the center line, some flexible members In be included in the first bullet being in the first direction connected to the mass member in the fore-and-aft plane in the accommodating chamber of the end cap Property element group and the accommodating chamber that the mass member is connected to the end cap along the vertical second direction of relatively described first direction The second interior flexible member group.

3. power tool according to claim 1, it is characterised in that：

The flexible member is the spring for connecting the mass member and the auxiliary handle respectively；

The number of the spring is even number；

Spring described in even number is symmetrical arranged on a symmetrical plane.

4. power tool according to claim 1, it is characterised in that：

The rear end of the end cap and the grip part, which is formed, to be detachably connected.

5. power tool according to claim 1, it is characterised in that：

The cavity wall of the accommodating chamber is separately positioned on the mass member and the receiving formed with groove, the flexible member for both ends Spring between the cavity wall of chamber, the spring are at least partially housed in the groove close to one end of the cavity wall of the accommodating chamber.

6. power tool according to claim 1, it is characterised in that：

The center line of the grip part passes through the mass member；

The flexible member is separately positioned on the spring between the cavity wall of the mass member and the accommodating chamber for both ends；

In the case where damping assembly is in equilibrium state, the spring extends at one in the fore-and-aft plane of the center line.

7. power tool according to claim 1, it is characterised in that：

The center line of the grip part passes through the mass member；

The flexible member is the spring being arranged between the cavity wall of the mass member and the accommodating chamber, the extension of the spring Direction is perpendicular to the center line；The number of the spring is 4,4 springs in the circumferencial direction around the center line On be uniformly arranged.

8. power tool according to claim 1, it is characterised in that：

The axis that the axis of the drive shaft turns of the motor is rotated perpendicular to the output shaft.

9. a kind of power tool, including：

Housing, formed with the main handle for being gripped for user；

Motor, is arranged in the housing, and the motor also has drive shaft；

It is characterized in that：

The power tool further includes：

Auxiliary handle, to the housing at the working head, the auxiliary handle is included along one for detachable installation The grip part of heart line extension；

The auxiliary handle further includes：

Wherein, formed with the accommodating chamber for accommodating the damping assembly in the auxiliary handle；Some flexible members are set Put between the cavity wall of the mass member and the accommodating chamber；The intrinsic frequency W1 of the damping assembly is rotated with the output shaft When the ratio of rotational frequency W2 be more than or equal to 0.7 and less than or equal to 1.3；

At least one mass member is arranged on one in the fore-and-aft plane of the center line, some flexible members In be included in the first flexible member being in the first direction connected to the mass member in the fore-and-aft plane in the accommodating chamber Group and the second elasticity being connected to the mass member along the vertical second direction of relatively described first direction in the accommodating chamber Element group.

10. a kind of power tool, including：

Housing, formed with the main handle for being gripped for user；

Motor, is arranged in the housing；

Working head, has output shaft, and the output shaft is driven by the motor；

It is characterized in that：

The power tool further includes：

Auxiliary handle, detachable installation is to the housing at the working head；

The auxiliary handle further includes：

The auxiliary handle includes the grip part extended along a center line；At least one mass member be arranged on one perpendicular to In the fore-and-aft plane of the center line, it is included in some flexible members in the fore-and-aft plane in the first direction by described in The first flexible member group that mass member is connected in the accommodating chamber is incited somebody to action with along the vertical second direction of relatively described first direction The mass member is connected to the second flexible member group in the accommodating chamber.