CN206690030U - Power tool - Google Patents

Abstract

The utility model provides a kind of power tool, including motor, and the output shaft for installment work head is driven by motor；Housing, including the inner housing and shell body being spaced apart, inner housing include the motor shell at least partly housing the head capsule of output shaft, being connected with head capsule；First support equipment is set on the outer surface of inner housing, the second support equipment is set on the inner surface of shell body, flexible damping piece is coupled between the first support equipment and the second support equipment；Elastic damping part offers stopper slot, stopper slot with one of the first support equipment, the second support equipment are matched is moved with limiting shell body along the axis direction of motor relative to inner housing.Power tool in the utility model, by setting the first support equipment, elastic damping part and the second support equipment, while ensure that good effectiveness in vibration suppression, the possibility that shell body moves relative to inner housing is limited, the problem of then avoiding the inside and outside housing direct collision that may be triggered by the relative movement between inside and outside housing.

Description

Power tool

Technical field

The present invention relates to a kind of power tool, more particularly to a kind of power tool with dampening apparatus.

Background technology

Power tool, such as swing-type power tool.Swing-type power tool generally comprise housing, the motor being housed in housing, Output shaft and the eccentric drive mechanism that is connected between motor and output shaft for installment work head, eccentric drive mechanism It is the oscillating motion that output shaft surrounds own axes by motor convert rotational motion.So, in the connection of the free end of output shaft not After same work head, such as saw blade, frosted disk, swing-type power tool can realize a variety of operations, such as saw, grind, to adapt to Different work requirements.

Swing-type power tool has been had gained some understanding by prior art, the progress of the shell fixation of its motor and toolroom machine It is threadedly coupled or is set directly on housing.Operator is usually directly held on housing when carrying out operation, then is swung Inevitably caused larger vibration is just directly transferred to operator to machine from toolroom machine in the course of the work.Therefore it have impact on pendulum The operation comfort of dynamic power tool.

For problem above, have been developed that at present by setting elasticity resistance between oscillating machine inner housing, shell body The technology that damping member separates both.Operator is held on shell body, is not contacted directly with producing the inner housing of vibration, by This reduces hand-held vibration sense, improves the comfortableness of operation.At the same time, circle is separately provided with elastic damping part to open Mouthful, by the mutual clamping of circular open and the cylindrical protrusions being arranged on inner housing or shell body, limit shell body phase The possibility of relative movement is produced to inner housing.This circular open elastic damping part can only be applicable the output shaft of oscillating machine at present Angle of oscillation is 3 ° or so of small-power swing tool, and its operating efficiency is limited.In order to improve operating efficiency, the output of oscillating machine Oriented more than 4 ° of axle swing angle, the trend of particularly 5 ° development, the power of oscillating machine motor will increase substantially.Now swing Active force that the work head of machine is born, parallel to motor axis direction becomes more violent.In order to limit inner housing and shell Relative movement between body, the radial dimension of circular open on increase projection and damping piece is would have to, it is bigger, convex to obtain Clamping area between circular open bears the active force for coming from work head.And the space between the inside and outside housing of oscillating machine It is limited.Also, the raised card access surface with circular open is curved surface, what it really worked, it can bear to come from work The effective area of the active force of head, is that (projected area is less than projected area of the curved surface in the plane perpendicular to motor axis Clamping area), the inside and outside housing of limitation that this further weakens cylindrical protrusions with the mutual clamping of circular open is realized is relative Mobile effect.

Therefore it is real to be necessary to develop a kind of new power tool, both can be with the basis of oscillating machine size is not increased The vibration of oscillating machine is reduced well, can also limit the relative movement between oscillating machine inner housing and shell body.

The content of the invention

It is an object of the invention to provide one kind to operate comfortable power tool.

To solve the above problems, the technical solution adopted in the present invention is as follows：

A kind of power tool, including：Motor；Output shaft, the output shaft is driven by the motor, for installment work Head；Housing, including inner housing and shell body, the inner housing portion are housed in the shell body, and the inner housing includes head Shell, the motor shell being connected with the head capsule, the head capsule at least partly house the output shaft；In the appearance of the inner housing First support equipment is set on face, the second support equipment, first support equipment are set on the inner surface of the shell body Flexible damping piece is coupled between second support equipment, define on the elastic damping part with first support equipment It is matched for the first mating part；Define matched for the second mating with second support equipment on the elastic damping part Portion；One of first mating part, second mating part are configured to stopper slot, and the stopper slot includes a pod, The pod extends along the axis lengthwise perpendicular to the motor.

Preferably, in first support equipment, second support equipment with the stopper slot is matched is constructed It is described raised matched with the pod of the stopper slot for projection, to limit the shell body in the axle along the motor Moved relative to the inner housing in line direction.

Preferably, first support equipment, the second support equipment other in which are configured to groove, described recessed Groove at least houses the part elastic damping part.

Preferably, the power tool is swing-type power tool, and the output shaft makees the reciprocal fortune of rotation around own axes It is dynamic.

Preferably, the axis of the motor intersects with the axis of the output shaft, be defined through the axis of the motor with Plane on the basis of the plane of the axis of the output shaft.

Preferably, first support equipment comprises at least a pair, is arranged in the inner housing on the benchmark On the symmetrical two sides of plane；Second support equipment comprises at least a pair, is arranged in the shell body on described On the symmetrical both sides inner surface of datum plane；Second support equipment and first support equipment are positioned opposite.

Preferably, the elastic damping part comprises at least a pair, is arranged in positioned at described datum plane the same side, Between first support equipment and second support equipment.

Preferably, the stopper slot also includes a translot, and translot setting angled with the pod is simultaneously indulged with described Groove connects.

Preferably, second support equipment is configured to special-shaped projection, the abnormity it is raised respectively with the pod and The translot is matched, is moved with limiting the shell body in the datum plane relative to the inner housing.

Preferably, first support equipment, the elastic damping part and second support equipment are arranged on the head Between shell and the shell body.

Preferably, first support equipment, the elastic damping part and second support equipment are arranged at the horse Up between shell and the shell body.

The power tool of the present invention, by the first support equipment for being arranged on inner casing external surface, it is arranged on shell body The second support equipment on inner surface and with the elastic damping part being connected between the first support equipment and the second support equipment Oscillating machine inner housing and shell body are spaced apart；Stopper slot is set on elastic damping part, and arranges stopper slot and first Support equipment or the second support equipment is matched.So so, while ensure that effectiveness in vibration suppression, also limit inner housing with The possibility relatively moved between shell body, so as to avoid the direct collision between inner housing and shell body.

Brief description of the drawings

Fig. 1 is first embodiment of the invention, the front view of swing-type power tool.

Fig. 2 is the schematic diagram that swing-type power tool shown in Fig. 1 removes half shell body.

Fig. 3 is the partial perspective view of swing-type power tool shown in Fig. 1.

Fig. 4 is the sectional perspective exploded view of swing-type power tool shown in Fig. 1.

Fig. 5 is along line A-A cut-away view in Fig. 2.

Fig. 6 is along line B-B cut-away view in Fig. 2.

Fig. 7 is second embodiment of the invention, the partial perspective view of reciprocating saw.

Related elements reference numeral in diagram is as follows：

100. the support equipment of 47. motor drive shaft of swing-type power tool 65. second

32. the elastic damping part of 48. motor of housing 68.

33. the stopper slot of 50. eccentric drive mechanism of axial direction 69.

34. the inner surface of 52. shift fork of output shaft 70.

36. the pod of 54. offset assembly of clamp assembly 71.

38. the translot of 56. eccentric shaft of inner housing 72.

40. the outer surface of 58. driving wheel of shell body 74.

42. the outer wall of 60. sleeve pipe of grip zone 80.

44. the forked portion of head capsule 62.

46. the support equipment of motor shell 64. first

Embodiment

Below in conjunction with the accompanying drawings and embodiment the present invention is described in further detail.

First embodiment

The creating conception of the present invention is illustrated in present embodiment by taking swing-type power tool as an example.

Referring to Fig. 1, swing-type power tool 100 includes housing 32, the output shaft 34 internally extended from housing 32, peace Work head (not shown) mounted in the end of output shaft 34, the clamping group for clamping work head on the axial direction 33 of output shaft Part 36.Axial direction 33 is approximately along the axis Y extensions parallel to output shaft 34.

Housing 32 includes the inner housing 38 and shell body 40 being spaced apart.40 substantially rectilinear extension of shell body, shell body 40 longitudinal extending axis is X1, and the part of inner housing 38 bends extension from one end opposite shell body 40 of shell body 40.Shell body 40 have grip zone 42, and user grasps the grip zone 42 during guiding tool.

The plane for being defined through the longitudinal extending axis X1 of the shell body 40 and axis Y of output shaft is mid-plane, also It is to say, when the longitudinal extending axis X1 of shell body 40 and the axis Y of output shaft are coplanar, forms mid-plane.In the present embodiment, The longitudinal extending axis X1 of shell body 40 is approximately perpendicular to the axis Y of output shaft.It may occur to persons skilled in the art that shell body 40 longitudinal extending axis X1 and the axis Y of output shaft can also be non-coplanar, or coplanar but out of plumb, such as the longitudinal direction of shell body 40 Extension axis X1 is parallel with the axis Y of output shaft or in other angles.

Reference picture 2, inner housing 38 include the motor at least partly housing the head capsule 44 of output shaft 34, being connected with head capsule 44 Shell 46.Motor shell 46 is used to install motor 48, and motor 46 has motor drive shaft 47 (can join Fig. 3).Motor shell 46 can be as needed It is designed to partially or completely coat motor 48.In this example, head capsule 44 is made of metal, and motor shell 46 is made of plastics.When So, head capsule 44 and motor shell 46 can be made up of metal or plastics as needed.Motor shell 46 in the present embodiment is by two parts Composition, the both ends and part for being separately positioned on motor 48 coat motor 48, and the center section of motor 48 is then uncoated in motor shell In 46.And motor shell 46 can also be by being monolithically fabricated, now it can coat motor 48 completely.

Reference picture 3, eccentric drive mechanism 50 is provided between motor drive shaft 47 and output shaft 34, passes through eccentric drive mechanism 50 Motor 48 is converted into oscillating motion of the output shaft 34 around own axes Y around the rotary motion of the axis X 2 of itself, swung Direction as shown in arrow R-R in figure.After the free end of output shaft 34 connects different operating head attachments, such as straight blade, circle Saw blade, triangle frosted disk etc., you can to realize the operation such as cutting or grinding.

It is defined through plane on the basis of the axis X 2 of motor and the axis Y of output shaft plane, that is to say, that when motor Axis X 2 and the axis Y of output shaft are coplanar, form datum plane.And in the present embodiment, the axis Y of output shaft is approximately perpendicular to The axis X 2 of motor.It may occur to persons skilled in the art that the axis Y of the axis X 2 of motor and output shaft can also be non-coplanar, Or coplanar but out of plumb, as the axis X 2 of motor and the axis Y of output shaft are parallel or in other angles.

Certainly, in the present embodiment, the longitudinal extending axis X1 of the axis X 2 of motor and shell body 40 is overlapped, therefore, base Directrix plane and mid-plane overlap.

With continued reference to Fig. 3, eccentric drive mechanism 50 is arranged in head capsule 44, including shift fork 52 and is connected on motor drive shaft 47 Offset assembly 54.Wherein, offset assembly 54 includes the eccentric shaft 56 being connected on motor drive shaft 47 and on eccentric shaft 56 Driving wheel 58.One end of shift fork 52 is connected to the top of output shaft 34, the phase of driving wheel 58 of its other end and offset assembly 54 Coordinate.Shift fork 52 includes being set in the sleeve pipe 60 on output shaft 34 and vertically motor drive shaft 47 is horizontal-extending from the top of sleeve pipe 60 Forked portion 62.In present embodiment, driving wheel 58 is ball bearing, and it has spherical with the cooperation of the forked portion 62 of shift fork 52 Outer surface.Eccentric shaft 56 is connected with the bias of motor drive shaft 47, i.e. the axis X 3 of eccentric shaft 56 and the axis X 2 of motor drive shaft 47 is misaligned, And the spacing that radial deflection is certain.The forked portion 62 of shift fork 52 is coated on the both sides of driving wheel 58, and closely with driving wheel 58 outer surface sliding contact.

When the motor shaft 47 of motor 48 rotates, eccentric shaft 56 is then with respect to the axis of motor under the drive of motor drive shaft 47 X2 eccentric rotaries, and then driving wheel 58 is driven with respect to the eccentric rotary of axis X 2 of motor.Under the drive of driving wheel 58, shift fork 52 Axis Y with respect to output shaft is swung, and further drives output shaft 34 to be swung around its own axis Y.Output shaft 34 swings band Dynamic work head mounted thereto is swung so as to be processed to workpiece.

In the present embodiment, the swing angle of output shaft 34 is 5 °.The hunting frequency of output shaft 34 is 18000 times per minute. By the way that the swing angle of output shaft is arranged into 5 °, the operating efficiency of work head is substantially increased, and when work head is saw blade When, it is easy to the discharge of chip.

It is pointed out that swing-type power tool of the present invention, the swing angle of output shaft 34 is not limited in 5 °, and it can To be arranged as required to as the value more than or less than 5 °.The hunting frequency of output shaft 34 is also not necessarily limited to 18000 times per minute, preferably More than 10000 times per minute.

For swing-type power tool when performing operation, work head is primarily subjected to the power parallel to motor axis X2 directions, simultaneously Also by from other directions such as perpendicular to the power in motor axis X2 directions.Because housing 32 includes inner housing 38 and shell body 40, inner housing 38 and shell body 40 separate simply by elastic damping part 68.In order to limit shell body 40 in datum plane Moved relative to inner housing 38, the first support equipment 64, the second support equipment 65 are provided between inner housing 38 and shell body 40 And elastic damping part 68.

In the present embodiment, it is provided with first between head capsule 44 and shell body 40, between motor shell 46 and shell body 40 Support equipment 64, the second support equipment 65 and elastic damping part 68.Certainly, the first support equipment 64, the second support equipment 65 And elastic damping part 68 can also be provided only between head capsule 44 and shell body 40；Or motor shell 46 and shell body 40 it Between.

The first support equipment 64, the second support equipment 65 and elastic damping part are provided with least side of datum plane 68.In view of swing-type power tool 100 in the course of the work, it is principal vibration source perpendicular to the direction of datum plane, in order to More preferable effectiveness in vibration suppression can be obtained, in the present embodiment, the first support equipment 64, the are symmetrically arranged with the both sides of datum plane Two support equipments 65 and elastic damping part 68.

Below only between head capsule 44 and shell body 40, and positioned at the first support equipment 64, second of datum plane side It is specifically described exemplified by support equipment 65 and elastic damping part 68.

With reference to figure 4, Fig. 5 and Fig. 6, the first support equipment 64 is disposed with the outer surface 74 of inner housing 38, shell body 40 The second support equipment 65 is disposed with inner surface 70, flexible resistance is coupled between the first support equipment 64 and the second support equipment 65 Damping member 68.

Elastic damping part 68 offers stopper slot 69 on the surface towards the second support equipment 65.Stopper slot 69 includes one The translot 72 of pod 71 and one.It is raised that second support equipment 65 is configured to abnormity matched with pod 71 and translot 72 respectively； First support equipment 64 is configured to rectangular channel to house part elastic damping part 68.

Pod 71 is especially placed along extending perpendicular to motor axis X2 lengthwises, it is contemplated that oscillating machine work head is main Impact direction is the direction parallel to motor axis X2.Pod is configured to linear and non-curved, then when itself and second During 65 clamping of support equipment, card access surface is plane, and for the card access surface perpendicular to motor axis X2, its area is to bear to put down in itself Row is in the effective area of the active force in motor axis direction.It is arranged so as to obtain limitation shell body 40 along motor axis X2 The optimum efficiency moved on direction relative to inner housing 38.Translot 72 penetrates above-mentioned pod 71, and is opened up in elastic damping part 68 On the surface of limited location groove 69, the lengthwise bearing of trend of translot 72 is with the lengthwise bearing of trend of pod 71 at an angle to bear Come from work head, active force non-parallel to motor axis X2 directions, it is preferred that the lengthwise bearing of trend of translot 72 with it is vertical The lengthwise bearing of trend of groove 71 is in 90 ° of settings.

In the present embodiment, the first support equipment 64 is arranged on inner housing 38, and the second support equipment 65 is arranged in shell body On 40, stopper slot 69 is opened in elastic damping part 68 towards on the surface of the second support equipment 65.Certainly, the first support equipment 64 can also be arranged on shell body 40, and accordingly, the second support equipment 65 is arranged on inner housing 38.

Second embodiment

The creating conception of the present invention is illustrated in present embodiment by taking reciprocating saw as an example.Reciprocating saw is with reciprocating saw blade Carry out the electric tool of sawing, including casing, the motor in casing, by motor-driven reciprocal rod unit, be connected to electricity Transmission mechanism between machine and reciprocal rod unit.

Reference picture 7, in order to reduce vibration, the operation comfort of operator is improved, reciprocating saw is provided with double Shell.Inner casing The head capsule 44 of body 38 including partial receipt reciprocating lever and the motor shell 46 being connected with the head capsule, in the partial receipt of shell body 40 Housing 38.In the present embodiment, shell body 40 is arranged on grip zone.By setting elasticity resistance between inner housing 38 and shell body 40 Damping member 68 separates inner housing 38, shell body 40.In operation, work head (saw blade) is primarily subjected to parallel reciprocating saw Power in motor axis X2 directions.Because housing includes inner housing 38 and shell body 40, in order to limit shell body 40 along motor The direction of axis X 2 is moved relative to inner housing 38, the first support equipment 64 is disposed with the outer surface 74 of inner housing 38, in shell The second support equipment 65 is disposed with the inner surface 70 of body 40, matches somebody with somebody between the first support equipment 64 and the second support equipment 65 and is connected to Elastic damping part 68, elastic damping part offer stopper slot 69, the support equipment 64 of stopper slot 69 and first, the second support equipment 65 One of them is engaged is moved with limiting shell body 40 along motor axis X2 directions relative to inner housing 38.

In the present embodiment, the first support equipment 64, the second support equipment are provided between motor shell 46 and shell body 40 65 and elastic damping part 68.

In the present embodiment, reciprocating saw is being arranged symmetrically the first support equipment 64, second on motor axis X2 directions Support equipment 65 and elastic damping part 68.

The first support equipment 64 between motor shell 46 and shell body 40, the second support equipment 65 and elasticity below It is specifically described exemplified by damping piece 68.

With reference to figure 7, the first support equipment 64, the inner surface 70 of shell body 40 are disposed with the outer surface 74 of inner housing 38 On be disposed with the second support equipment 65, flexible damping piece 68 is coupled between the first support equipment 64 and the second support equipment 65, Elastic damping part 68 offers stopper slot 69 on the surface towards the second support equipment 65.

Stopper slot 69 is especially placed along extending perpendicular to motor axis X2 lengthwises, it is contemplated that reciprocating saw blade is main Impact direction is the direction parallel to motor axis X2.It is arranged so as to obtain limitation shell body 40 along motor axis X2 side The optimum efficiency moved upwards relative to inner housing 38.

Second support equipment 65 is configured to the projection to match with stopper slot 69；First support equipment 64 is configured to Rectangular channel is to house part elastic damping part 68.

In the present embodiment, the first support equipment 64 is arranged on inner housing 38, and the second support equipment 65 is arranged in shell body On 40, stopper slot 69 is opened in elastic damping part 68 towards on the surface of the second support equipment 65.Certainly, the first support equipment 64 can also be arranged on shell body 40, and accordingly, the second support equipment 65 is arranged on inner housing 38.

Elastic damping part 68 can possess in the state of the first support equipment 64 is not inserted be suitable for after to be inserted Shape.For example, elastic damping part 68 is being rectangle in the state of not inserting and made by inserting the prestressing force under state Its shape changes.Therefore, prestressed generation can produce extremely advantageous influence to the inside of elastic damping part 68.It is adapted to Prestressing force especially between 20% to 40%, and preferably 35%.

Elastic damping part 68 has certain elasticity, uses polyurethane (PU), EPDM (EPDM), polypropylene (EPP), rubber Glue and mixture etc..These materials are used between inner housing 38 and shell body 40, coordinates appropriate prestressing force, is held in user Improve the comfort level of operation when holding electric tool.

The invention is not restricted to the embodiment in previous embodiment, those skilled in the art open the technology of the present invention marrow Other changes can also be made under showing, but as long as the function and the present invention of its realization are same or similar, all should be covered in the present invention Protection domain in.

Claims (11)

1. a kind of power tool, including：

Motor；

Output shaft, the output shaft are driven by the motor, for installment work head；

Housing, including inner housing and shell body, the inner housing portion are housed in the shell body, and the inner housing includes head Shell, the motor shell being connected with the head capsule, the head capsule at least partly house the output shaft；

It is characterized in that：First support equipment is set on the outer surface of the inner housing；On the inner surface of the shell body Second support equipment is set；Flexible damping piece is coupled between first support equipment and second support equipment, defines It is matched for the first mating part with first support equipment on the elastic damping part；Define on the elastic damping part with Second support equipment is matched for the second mating part；One of first mating part, second mating part quilt Stopper slot is configured to, the stopper slot includes a pod, and the pod extends along the axis lengthwise perpendicular to the motor.

2. power tool according to claim 1, it is characterised in that：First support equipment, second support are set In standby with the stopper slot it is matched be configured to projection, it is described raised matched with the pod of the stopper slot, with The shell body is limited to move relative to the inner housing in the axis direction along the motor.

3. power tool according to claim 2, it is characterised in that：First support equipment, second support are set Standby middle other in which is configured to groove, and the groove houses at least partly described elastic damping part.

4. power tool according to claim 1, it is characterised in that：The power tool is swing-type power tool, described Output shaft makees rotary reciprocating motion around own axes.

5. power tool according to claim 4, it is characterised in that：The axis of the axis of the motor and the output shaft It is intersecting, it is defined through plane on the basis of the plane of the axis of the motor and the axis of the output shaft.

6. power tool according to claim 5, it is characterised in that：The quantity of first support equipment comprises at least one It is right, the inner housing is arranged on the symmetrical two sides of the datum plane；The quantity of second support equipment Including at least a pair, the shell body is arranged on the symmetrical both sides inner surface of the datum plane；Described second Support equipment and first support equipment are positioned opposite.

7. power tool according to claim 6, it is characterised in that：The quantity of the elastic damping part comprises at least one It is right, it is coupled respectively between first support equipment of described datum plane the same side and second support equipment.

8. power tool according to claim 7, it is characterised in that：The stopper slot also includes a translot, the translot Setting angled with the pod is simultaneously connected with the pod.

9. power tool according to claim 8, it is characterised in that：It is convex that second support equipment is configured to abnormity Rise, the abnormity is raised matched with the pod and the translot respectively, to limit the shell body in the datum plane Inside moved relative to the inner housing.

10. power tool according to claim 1, it is characterised in that：First support equipment, the elastic damping part And second support equipment is arranged between the head capsule and the shell body.

11. power tool according to claim 1, it is characterised in that：First support equipment, the elastic damping part And second support equipment is arranged between the motor shell and the shell body.