CN102079061A

CN102079061A - Power tool

Info

Publication number: CN102079061A
Application number: CN2009102512770A
Authority: CN
Inventors: 张士松; 顾育明; 李祥庆
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2009-12-01
Filing date: 2009-12-01
Publication date: 2011-06-01
Anticipated expiration: 2029-12-01
Also published as: CN102079061B

Abstract

The invention relates to a power tool which comprises an angularly arranged shell (11) and a first output shaft (13) extending from the shell (11), and a motor (12) is arranged inside the shell (11), wherein the motor (12) is provided with a motor shaft (18); the first output shaft (13) can make swinging movement around the axis line per se; the shell (11) is provided with an opening (20), and a through hole (19) is arranged in the first output shaft (13); and the motor shaft (18) is connected with an adapter (23), the adapter (23) is provided with two free ends, and the free end which is not connected with the motor shaft (18) is coaxial with the opening (20) and the through hole (19). In the scheme, a second output shaft is added, and the second output shaft is connected with the motor shaft. Thus, rotation movement can be generated, and highly integrated swinging movement and rotation movement of the power tool are realized.

Description

Power tool

Technical field

The present invention relates to a kind of power tool of hand-held class.

Background technology

The power tool of hand-held class drives output shaft by motor usually and produces different motions, as rotation, back and forth, action such as swing, and then drive the working head that is connected on the output shaft and carry out corresponding work, as bore, saw, cut, mill etc.Common electric drill, electric circular saw rotatablely move owing to output shaft drives the working head generation, thereby are typical case's representatives of rotation class power tool; Sweep-saw, reciprocating saw then produce reciprocating motion because output shaft drives saw blade, thereby are typical case's representatives of reciprocal class power tool; The machine of FEIN and Bosch company then produces swing because output shaft self centers on axial line, thereby is typical case's representative of swing class power tool.

Along with making rapid progress of science and technology, one of technical development road of power tool is exactly the integrated of height, can realize multiple function on an instrument, in particular, be exactly promptly can realize the motion that certain is single on this instrument, as rotate type games, also can realize the motion of other classes, as reciprocal class or swing type games, the user only needs to change different working heads, just can between these motion modes, switch back and forth, make things convenient for application aims to reach.

In the present swing class power tool, because output shaft under the driving of motor, transmits moment of torsion through the eccentric wheel transmission mechanism, only can realize that output shaft centers on axial line and does oscillating motion, for the current general power tool that can realize multiple function, it is single that function shows slightly.

U.S. Pat 5441450A discloses a kind of machine that has both swing and rotatablely move, and it also is provided with a movably bevel pinion in housing on the basis of swing mechanism, and corresponding bevel gear also is provided with a bevel gear wheel on output shaft simultaneously.When two bevel gears of size did not produce engagement, swing mechanism was communicated with, and rotating mechanism disconnects, and machine is done oscillating motion at this moment.When two bevel gears of size produced engagement, swing mechanism disconnected, and rotating mechanism is communicated with, and rotate this opportunity.Thereby,, just can between two kinds of motion modes, switch by moving of bevel pinion.

But the technique scheme structure is comparatively complicated, and two bevel gears of size need be set in housing, has increased the volume size of housing.

Therefore, prior art is necessary further improvement in fact.

Summary of the invention

The object of the present invention is to provide a kind of power tool, when having small and exquisite size, integrated height can be realized the swing and the operation that rotatablely moves.

For achieving the above object, the invention provides a kind of power tool, comprise housing that is the angle setting and first output shaft that from housing, extends, and the inside of housing is provided with motor, motor has motor drive shaft, first output shaft can be done oscillating motion around its axial line, described housing is provided with opening, described first output shaft is provided with perforation, be connected with adaptor on the described motor drive shaft, described adaptor has two free ends, and wherein the free end that is not connected with motor drive shaft is coaxial with described opening and described perforation.

Preferably,

Selectable second output shaft that is connected with motor drive shaft extends in described perforation and described opening.

The size of described perforation is greater than the diameter of second output shaft.

Be connected with cam pin on the described motor drive shaft, a free end of described adaptor is connected with described cam pin, and another free end then is connected with second output shaft.

The axial line of described second output shaft is coaxial with the axial line of motor drive shaft.

The axial line of described second output shaft and the axis parallel of motor drive shaft.

The free end of described second output shaft is connected with drill chuck.

Described housing also comprises closing cap, and described closing cap can be filled in the opening.

Increased by second output shaft in this programme, and second output shaft connects motor drive shaft, rotatablely move, realized the oscillating motion of power tool Highgrade integration and rotatablely move thereby can produce.

Description of drawings

Fig. 1 is the stereogram of medium power instrument of the present invention, only expresses the fore-end of power tool among the figure.

Fig. 2 is the generalized section of described power tool.

Fig. 3 a is the user mode reference diagram of described power tool, at this moment, is connected with the annex working head on first output shaft, and unloaded on second output shaft.

Fig. 3 b is the user mode reference diagram of described power tool, at this moment, is connected with the annex working head on second output shaft, and unloaded on first output shaft.

Fig. 4 is the schematic perspective view of described power tool, at this moment, second output shaft is not set in the housing, and opening is sealed by closing cap.

Fig. 5 is the generalized section of described power tool, at this moment, second output shaft is not set in the housing, and closing cap is filled in the opening on the housing.

Related elements reference numeral in the diagram is as follows:

11, housing 12, motor 13, first output shaft

14, bearing 15, bearing 16, shift fork

161, adjutage 162, adjutage 17, eccentric wheel

18, motor drive shaft 181, cam pin 19, perforation

20, opening 21, second output shaft 22, drill chuck

23, adaptor 24, closing cap

The specific embodiment

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

See also Fig. 1 to Fig. 2, a kind of power tool, comprise and roughly be the housing 11 that angle is provided with, with in the front end (right side is defined as front end among the figure) of housing 11, extending first output shaft 13 is arranged, wherein, be positioned at the motor 12 of housing 11 inside, motor 12 has motor drive shaft 18, the first output shafts 13 and is fixedly coupled in housing 11 by two

bearings

14,15 up and down that are arranged on housing 11 inside.Also be fixedly coupled shift fork 16 on first output shaft 13, shift fork 16 has two and is the adjutage 161,162 that is oppositely arranged, and between these two adjutages 161,162, fits tightly adjutage 161,162 and be provided with an eccentric wheel 17.Simultaneously, eccentric wheel 17 is set in a cam pin 181 on the motor drive shaft 18 that is connected motor 12 again, is provided with and make eccentric wheel 17 be eccentric with respect to motor drive shaft 18.Thereby, after motor 12 drives, motor drive shaft 18 will drive eccentric wheel 17 and do eccentric rotation with respect to motor drive shaft 18, again because shift fork 16 closely contacts with eccentric wheel 17, so, shift fork 16 can be under the driving of eccentric wheel 17, drives first output shaft 13 and does oscillating motion on the direction of rotation around the axial line of first output shaft 13.

At this moment, if be connected with on the free end of first output shaft 13 different near behind the working head, as straight blade, saw blade or triangle frosted dish or the like, just can realize operations such as cutting, grinding.

In the power tool of this programme, front end at housing 11, the position of the bearing of trend of corresponding motor drive shaft 18 is provided with an opening 20, second output shaft 21 that can be connected with motor drive shaft 18 extends from opening 20, and the free end of second output shaft 21 is connected with drill chuck 22 with installing drill bit or screwdriver bit.The middle part of corresponding second output shaft 21, i.e. first output shaft 13 and second output shaft 21 position of intersecting, on first output shaft 13, offer perforation 19, wear wherein for second output shaft 21, and the size of perforation 19 does not produce interference greater than the diameter of second output shaft 21 thereby make between first output shaft 13 and second output shaft 21, that is to say that two output shafts all can independently be worked.

Second output shaft 21 here directly is connected with motor drive shaft 18, specifically be by an adaptor 23, being an end of adaptor 23 is connected with a cam pin 181 on the motor drive shaft 18, the other end then is connected with second output shaft 21, thereby the axial line that makes second output shaft 21 is coaxial with the axial line of motor drive shaft 18, promptly second output shaft 21 is the non-eccentricity setting with respect to motor drive shaft 18, the moment of torsion of its acceptance also is the rotation torque from motor drive shaft 18, therefore, the motion of second output shaft 21 is for rotatablely moving.

Certainly, adaptor 23 also can be arranged to make the axial line of second output shaft 21 and the axial line of motor drive shaft 18 to be parastate, promptly second output shaft 21 is eccentric with respect to motor drive shaft 18, the moment of torsion of its acceptance also is the eccentric rotation torque from motor drive shaft 18, therefore, the motion of second output shaft 21 is that off-centre rotatablely moves.

It should be noted that the perforation 19 on first output shaft 13 will enlarge this moment, the scope of rotating with the off-centre that satisfies second output shaft 21.

Like this, described power tool has just possessed rotation simultaneously and has swung two kinds of movement effects, when respectively after connecting different working heads on two output shafts, just can realize different operations respectively, wherein, swinging operation can be realized on first output shaft 13, and rotary manipulation can be realized on second output shaft 21.

In use, the user can select different output shafts according to application demand, and connects the working head that adapts.Shown in Fig. 3 a, if the user need realize operations such as swing cutting or grinding, can connect straight blade, saw blade or the triangle frosted dish that adapts on first output shaft 13, the oscillating motion that produces by first output shaft 13 realizes the swing function operations.Shown in Fig. 3 b, if the user need realize operations such as boring or the turn of the screw, can on second output shaft 21, connect drill chuck or screwdriver screwdriver bit, realize the operation of spinfunction by rotatablely moving of second output shaft, 21 generations.

Need to prove that first output shaft 13 and second output shaft 21 all are independently to work separately, the two does not produce the relation of interfering.And when using, the user also always only uses a function wherein, can not both use simultaneously.Therefore, when the user uses one of them output shaft, on another output shaft coupling working head not.

See also Fig. 4 to Fig. 5, when the user only uses an output shaft, when being generally first output shaft 13, in order to prevent in housing 11 upper sheds 20, have dust to enter, the present invention also comprises a closing cap 24, its size is suitable with opening 20, can fill in the opening 20 to avoid dust to enter housing 11 inside.At this moment, the inside of housing 11 is not provided with second output shaft 21.

Claims

1. power tool, comprise housing (11) that is the angle setting and first output shaft (13) that from housing (11), extends, and the inside of housing (11) is provided with motor (12), motor (12) has motor drive shaft (18), first output shaft (13) can be done oscillating motion around its axial line, it is characterized in that: described housing (11) is provided with opening (20), described first output shaft (13) is provided with perforation (19), be connected with adaptor (23) on the described motor drive shaft (18), described adaptor (23) has two free ends, and wherein the free end that is not connected with motor drive shaft (18) is coaxial with described opening (20) and described perforation (19).

2. power tool as claimed in claim 1 is characterized in that: selectable second output shaft (21) that is connected with motor drive shaft (18) extends in described perforation (19) and described opening (20).

3. power tool as claimed in claim 2 is characterized in that: described perforation (19) is greater than the diameter of second output shaft (21).

4. power tool as claimed in claim 3, it is characterized in that: be connected with cam pin (181) on the described motor drive shaft (18), a free end of described adaptor (23) is connected with described cam pin (181), and another free end then is connected with second output shaft (21).

5. power tool as claimed in claim 4 is characterized in that: the axial line of described second output shaft (21) overlaps with the axial line of motor drive shaft (18).

6. power tool as claimed in claim 4 is characterized in that: the axis parallel of the axial line of described second output shaft (21) and motor drive shaft (18).

7. power tool as claimed in claim 2 is characterized in that: the free end of described second output shaft (21) is connected with drill chuck (22).

8. power tool as claimed in claim 1 is characterized in that: described housing (11) also comprises closing cap (24), and described closing cap (24) can seal opening (20).