CN201015835Y

CN201015835Y - Power tool

Info

Publication number: CN201015835Y
Application number: CNU2007200354158U
Authority: CN
Inventors: 钟红风; 张士松
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2007-03-15
Filing date: 2007-03-15
Publication date: 2008-02-06
Anticipated expiration: 2017-03-15

Abstract

The utility model discloses a driving instrument which comprises a shell body, a motor in the shell body, an outlet shaft matched and connected with the motor, a shield matched and connected with the shell and a locking device optionally connected with the shield and the outlet shaft. The locked device comprises a shield locking part and an outlet shaft locking part, the shield is locked and the outlet shaft is unlocked when the shield locking device matches with and is connected with the shield, while the outlet shaft is locked and the shield is unlocked when the outlet shaft locking part matches with and is connected with the outlet shaft. The shield locking part of the driving instrument locking device of the utility model is interlocked with the outlet shaft locking part.

Description

Power tool

Technical field

The utility model relates to a kind of power tool, in particular for carrying out the power tool of grinding work.

Background technology

Traditional grinding tool generally has housing, is arranged on the motor in the housing, and the output shaft with motor connects fixedly connects the working head on output shaft, connects the guard shield on housing, and this guard shield part is round this working head.

U.S.'s bulletin patent has disclosed a kind of angle mill for the 4th, 924, No. 635.This patent has disclosed 3 embodiment that are used for lock angle mill guard shield, wherein the guard shield locking device among each embodiment includes pivotable action bars, fixedly connects locking member on action bars, this locking original paper releasedly be arranged on guard shield on groove be meshed, thereby with guard shield locking or unclamp.

Britain's bulletin patent has disclosed a kind of angle mill for the 2nd, 283, No. 191, and this angle mill is provided with lock device of output shaft, when this lock device of output shaft locks output shaft, and can be from installation or removal working head on the output shaft.

The lock device of output shaft and the guard shield locking device of above-mentioned angle mill are that inconvenient operation is set separately respectively.

U.S. bulletin patent has disclosed the locking device that a kind of output shaft locking piece and hood latch mount are combined as a whole for the 5th, 766, No. 062.This locking device comprises locking member, and when primary importance, this locking member is meshed with groove on the guard shield, and guard shield is locked; When the second place, groove on this locking member and the guard shield and the groove on the output shaft all mesh, and output shaft, guard shield are all locked, and this moment can the installation or removal working head; When the 3rd position, groove on this locking member and the guard shield and the groove on the output shaft all do not mesh, and at this moment, can regulate guard shield and rotate with respect to housing.

The effect main body of above-mentioned output shaft, guard shield associating locking device is arranged at the outside of guard shield, when needs are regulated guard shield with respect to the position of housing, the operator must make locking member and guard shield break away from engagement along the direction pulling locking member that deviates from guard shield, when needs are changed working head, the operator must promote locking member along the direction towards guard shield makes locking member and guard shield and output shaft mesh, this kind locking device, complex structure, it is very inconvenient to operate.

Aforesaid output shaft, guard shield associating locking device, when needs are regulated guard shield with respect to the position of working head, need pulling locking member and guard shield to break away from engagement, output shaft certainly will be in released state, at this moment, the operator may be because maloperation have touched power supply, and output shaft drives working head and rotates at a high speed, and the operator is damaged.

The utility model content

For overcoming the deficiencies in the prior art, the purpose of this utility model is to provide a kind of locking device of simple in structure, easy-to-operate.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of power tool, comprise housing, be housed in the motor in the housing, the output shaft that connects with described motor, connect the guard shield on described housing, the locking device that connects with described guard shield or output shaft selectively, described locking device comprises hood latch mount and output shaft locking piece, and hood latch mount and output shaft locking piece interlock are provided with, and when hood latch mount and guard shield connected, guard shield was locked, the output shaft release, when output shaft locking piece and output shaft connected, output shaft was locked, the guard shield release; Described hood latch mount fixedly connects on described output shaft locking piece; Described output shaft locking piece comprises lock, and when output shaft locked, described lock and output shaft connected; Described lock is arranged in the gathering sill in the housing, and can move by the axis direction along described lock in described gathering sill; Described output shaft is provided with a plurality of grooves, and the end of described lock is provided with sticking department, when output shaft locks, and sticking department and the engagement of described groove; Described lock is provided with limit element, and described housing is provided with limiting section, and when guard shield locked, limit element and limiting section connected; The end that described lock is relative with sticking department has fixedly connected button; Be arranged with the elasticity original paper on the described lock, the two ends of described elasticity original paper are supported on respectively between button and the housing; Described hood latch mount comprises lock pin, and when guard shield locked, described lock pin and guard shield connected; Described guard shield is provided with a plurality of grooves, when guard shield locks, and lock pin and the engagement of described groove.

Compared with prior art, the beneficial effects of the utility model are: because hood latch mount and output shaft locking piece interlock are provided with, and hood latch mount, output shaft sticking department are positioned at the inboard of guard shield, when need to regulate the position of guard shield respectively with respect to housing, when needs are changed working head, the operator only need apply power facing one direction and promote locking device and make output shaft sticking department and output shaft engagement, hood latch mount mesh with the guard shield disengaging.In addition, when hood latch mount and guard shield disengaging engagement, the output shaft locking piece is because of continuous action relation and output shaft engagement, and output shaft is locked, and working head can be because of being injured the operator by error starting.This kind locking device, simple in structure, handling safety, convenience.

Description of drawings

Below in conjunction with accompanying drawing concrete elaboration is carried out in preferred embodiment of the present utility model.

Fig. 1 is the stereogram of the utility model angle mill;

Fig. 2 is the three-dimensional exploded view of the utility model angle mill;

Fig. 3 is the sectional view of the utility model angle mill, and at this moment, locking device is in first operating position, and guard shield is locked, the output shaft release;

Fig. 4 is the sectional view of the utility model angle mill, and at this moment, locking device is in second operating position, and output shaft is locked, the guard shield release.

Wherein:

1, housing 2, bearing block 3, handle 4, output shaft

5, bearing 6, bearing 7, face gear 8, working head

9, guard shield 10, clamping part 11, shroud body 12, locking device

13, lock 130, sticking department 14, gathering sill 15, lock pin

16, groove 17, groove 18, button 19, elasticity original paper

20, limit element 21, limiting section

The specific embodiment

The utility model is the locking device that preferred embodiment specifies power tool with the angle mill.

Referring to Fig. 1, shown in Figure 2, the utility model angle mill comprises housing 1, is housed in the motor in the housing 1, fixedly connects the bearing block 2 on housing 1, is fixedly mounted on the handle 3 on the housing 1.

Further referring to Fig. 3, shown in Figure 4, be provided with bearing 5 in the housing 1, be provided with bearing 6 in the bearing block 2, output shaft 4 is supported in bearing 5 and the bearing 6 rotationally.Output shaft 4 has connected face gear 7 near the partial fixing of bearing 5, and face gear 7 connects with the output shaft of motor.The end of output shaft 4 has connected working head 8 releasedly.

End adjustable ground at bearing block 2 close working heads 8 is equipped with guard shield 9, and guard shield 9 comprises the arc protective cover body 11 that adjustable ground is installed in the clamping part 10 on the bearing block 2 and fixedly connects with this clamping part 10, and shroud body 11 parts are around working head 8.When work, can rotate guard shield 9 as required it is rotated with respect to bearing block 3, thereby regulate the position of guard shield 9 with respect to working head 8, contact with working head 8 to prevent the operator.

Locking device 12 is arranged on the bearing block 2, and this locking device 12 comprises output shaft locking piece and hood latch mount.Hood latch mount fixedly connects on the spindle lock part, and hood latch mount also can be one-body molded with the spindle lock part.Hood latch mount is positioned at the inboard of clamping part 10.

The output shaft locking piece comprises lock 13, and lock 13 is arranged in the gathering sill 14 in the housing and can moving axially along lock 13.The end of this lock 13 is provided with sticking department 130.

Hood latch mount comprises lock pin 15, and this lock pin 15 fixedly connects on lock 13, and the axis normal of lock pin 15 is in the axis of lock 13.

In preferred embodiment of the present utility model, locking device 12 has two operating positions, and when first operating position, hood latch mount and guard shield 9 connect, and guard shield 9 is locked, and output shaft 4 is in released state; In second operating position, output shaft locking piece and output shaft 4 connect, and output shaft 4 is locked, and guard shield 9 is in released state.

Referring to shown in Figure 2, in order to realize above-mentioned lock function, circumferentially evenly be provided with a plurality of grooves 16 along output shaft 4, according to the utility model creating conception, groove 16 also can evenly be arranged on the fixture that is fixedly mounted on the output shaft 4, this fixture and output shaft 4 coaxial settings.In the utility model most preferred embodiment, output shaft 4 is provided with 3 grooves 16, is provided with a plurality of grooves 17 at the top edge of the clamping part 10 of guard shield 9.

Referring to shown in Figure 3, in first operating position, lock pin 15 is meshed with groove 17 on being arranged on clamping part 10, and guard shield 9 is locked, and guard shield 9 just can not rotate with respect to bearing block 2.

Referring to shown in Figure 4, in second operating position, sticking department 130 is meshed with groove 16 on being arranged on output shaft 4, and output shaft 4 is locked, and guard shield 9 is in released state.At this moment, can change working head 8, regulate the position of guard shield 9 with respect to working head 8 thereby also can rotate guard shield 9.

For the ease of operation, described lock 13 and sticking department 130 relative ends have fixedly connected button 18, and this button 18 stretches out from housing 1.Part at lock 13 close buttons 18 is arranged with elasticity original paper 19, and an end of this elasticity original paper 19 is resisted against on the bearing block 2, and the other end is resisted against on the button 18.This elasticity original paper 19 with locking device 12 bias voltages to first operating position.

Be provided with limit element 20 at the other end near lock 13, bearing block 2 is provided with limiting section 21, in first operating position of locking device 12, thereby limit element 20 and limiting section 21 are against preventing that under the elastic force of elasticity original paper 19 lock pin 15 breaks away from engagement with groove 17.

When needs are changed working head 8, press knob down 18 with hand, overcome the elastic force of flexible member 19, promotion lock 13 moves to the end and any one groove 16 engagement that is arranged on the output shaft 4 of lock 13 along the axis of lock 13 in gathering sill 14, output shaft 4 is locked, locking device 12 is in second operating position, at this moment, can manually or by instrument change working head 8.

Regulate the position of guard shield 9 if desired with respect to working head 8, can when being in second operating position, locking device 12 rotate guard shield 9 to the needs position, afterwards, release button 18, under the screen resilience of elasticity original paper 19, locking device 12 moves along the direction that deviates from output shaft 4, limit element 20 and limiting section 21 against the time, lock pin 15 is meshed with groove 17 on the clamping part 10 that is arranged on guard shield 9, thereby with guard shield 9 lockings, at this moment, locking device 12 is in first operating position.

In the above-mentioned preferred embodiment, because hood latch mount and output shaft locking piece interlock are provided with, when lock pin 15 broke away from engagement with guard shield 9, lock 13 was because of continuous action relation and output shaft 4 engagements, output shaft 4 is locked, and this moment, working head 8 can be because of not injured the operator by error starting.

According to the utility model creating conception, between first operating position and second operating position of locking device 12, the safety movement space can be set, realize lock 13 and main shaft 4 safe escapes.

Hood latch mount and output shaft locking piece that those of ordinary skill in the art is easy to locking device 12 are set to two independent individualities, hood latch mount is arranged on action bars and the setting of output shaft locking piece interlock on the housing 1 by pivot, press down an end of action bars, promoting hood latch mount and guard shield 9 connects, guard shield 9 lockings, output shaft 4 releases; Press down the other end of action bars, promote output shaft locking piece and output shaft 4 and connect, output shaft 4 lockings, guard shield 9 releases, just can change working head 8 this moment.

In a word, the utility model is not limited to the specific embodiment structure of being lifted, and the structure of conceiving based on the utility model all belongs to the utility model protection domain.

Claims

1. power tool, comprise housing (1), be housed in the motor in the housing (1), the output shaft (4) that connects with described motor, connect the guard shield (9) on described housing (1), the locking device (12) that connects with described guard shield (9) or output shaft (4) selectively, it is characterized in that: described locking device (12) comprises hood latch mount and output shaft locking piece, and hood latch mount and output shaft locking piece interlock are provided with, and when hood latch mount and guard shield (9) when connecting, guard shield (9) is locked, output shaft (4) release, when output shaft locking piece and output shaft (4) when connecting, output shaft (4) is locked, guard shield (9) release.

2. a kind of power tool according to claim 1 is characterized in that: described hood latch mount fixedly connects on described output shaft locking piece.

3. a kind of power tool according to claim 1 is characterized in that: described output shaft locking piece comprises lock (13), and when output shaft (4) locked, described lock (13) connected with output shaft (4).

4. a kind of power tool according to claim 3 is characterized in that: described lock (13) is arranged in the gathering sill (14) in the housing (1), and can move by the axis direction along described lock (13) in described gathering sill (14).

5. a kind of power tool according to claim 3, it is characterized in that: described output shaft (4) is provided with a plurality of grooves (16), the end of described lock (13) is provided with sticking department (130), when output shaft (4) locks, and sticking department (130) and described groove (16) engagement.

6. a kind of power tool according to claim 3, it is characterized in that: described lock (13) is provided with limit element (20), described housing (1) is provided with limiting section (21), and when guard shield (9) locked, limit element (20) connected with limiting section (21).

7. a kind of power tool according to claim 5 is characterized in that: the end that described lock (13) is relative with sticking department (130) has fixedly connected button (18).

8. a kind of power tool according to claim 7 is characterized in that: be arranged with elasticity original paper (19) on the described lock (13), the two ends of described elasticity original paper (19) are supported on respectively between button (18) and the housing (1).

9. a kind of power tool according to claim 1 is characterized in that: described hood latch mount comprises lock pin (15), and when guard shield (9) locked, described lock pin (15) connected with guard shield (9).

10. a kind of power tool according to claim 9 is characterized in that: described guard shield (9) is provided with a plurality of grooves (17), when guard shield (9) locks, and lock pin (15) and described groove (17) engagement.