CN202684704U

CN202684704U - Electric angle grinder

Info

Publication number: CN202684704U
Application number: CN 201220310329
Authority: CN
Inventors: 张淼; 刘贵仁
Original assignee: SHANGHAI KEN TOOLS CO Ltd
Current assignee: SHANGHAI KEN TOOLS CO Ltd
Priority date: 2012-06-29
Filing date: 2012-06-29
Publication date: 2013-01-23
Anticipated expiration: 2022-06-29

Abstract

The utility model provides an electric angle grinder. The angle grinder comprises a housing. The angle grinder is characterized in that a projection is arranged on one side of part of a rotary pin, which is located inside the housing, a clamping portion is arranged on the end portion of the other side of the rotary pin, a supporting block which is matched with the projection is arranged on the inside of the operation rod, an extending post is arranged on one side of a knob, on which the clamping portion is arranged, the extending post is connected to the housing, a recessed portion which is matched with the clamping portion is arranged on the end portion of the extending post, the projection is pressed on the supporting block under the action of a torsion spring when the knob is in the closing and locking state, and the clamping portion is clamped to the recessed portion when the knob is in the opening and locking state. Accordingly, the incorrect manipulation is avoided to a maximum extent, the state locking is achieved when the electric angle grinder is opened, the operation rod cannot be pressed by an operator usually during operation, the operation burden is reduced, the operation efficiency is improved and the phenomenon that a drive motor is stopped by mistake is avoided.

Description

Electric angle grinder

Technical field

The utility model relates to a kind of electric angle grinder, is used for work piece is carried out grinding or grinding operation.

Background technology

Conventional electric angle grinder generally includes a housing, head at housing is provided with one for the operation part that workpiece is carried out grinding or grinding, be provided with a CD-ROM drive motor that drives this operation part work at the middle part of housing, in the grip part of housing, be provided with a switch block that is used for switching this CD-ROM drive motor "on" position and off-position, be provided with an action bars below switch block, the operating personnel operates the switch block that is positioned at housing by action bars.When CD-ROM drive motor was in "on" position, the grinding abrasive disk of operation part can be with high speed rotation, in case operating personnel's operation is improper, perhaps the operating personnel is unfamiliar with instrument, and the grinding abrasive disk of High Rotation Speed is easily to causing human body to damage.For preventing to greatest extent maloperation, usually be provided with a locking component at the action bars annex.

For example PCT number is PCT/JP2009/065295, name be called " power tool " the PCT patent disclosure a kind of electric angle grinder, this electric angle grinder has CD-ROM drive motor, be used for to drive work piece carried out to grind to cut or the emery wheel of grinding operation; Motor shell, its receipts are loaded onto and are stated CD-ROM drive motor; Back cover, it is installed in and the motor shell back-end region of above-mentioned emery wheel installation position in opposition side, and consists of the handle portion that grasps for the operation personnel by the said motor shell; Action bars, it grasps operation by the operating personnel with hand, and it is for strip and be installed in the said motor shell and above-mentioned back cover on these two; Switch portion, its counterweight are in above-mentioned back cover, and this switch portion is connected with action bars by peristome, thereby and the operation by action bars produce action and carry out energising control to above-mentioned CD-ROM drive motor.

In above-mentioned patent, in order to prevent the generation of maloperation, be provided with a locking component at action bars, this locking component comprises rotating shaft, holding section and operating portion.The principle of its locking is: when being in lockup state, by the elastic reaction that spring applies, the holding section is fastened on the lug boss on the action bars, and at this moment, the operating personnel can't the operating operation bar; When operation personnel's a hand passes through the operating portion rotary locking part, when if the power that the operating personnel applies has surpassed the elastic force of spring, the holding section of locking component can be left lug boss gradually, until separate fully, at this moment, the operating personnel need to use the another hand, upwards presses action bars so that be positioned at the switch portion closure of action bars top, CD-ROM drive motor gets electric rear work, and emery wheel begins to carry out to grind to cut or grinding operation.But in operation process, the operating personnel needs always according to action bars, otherwise because the effect of spring restoring force, the holding section can be fastened on the lug boss again, so that CD-ROM drive motor quits work.

This shows, although above-mentioned locking component can prevent maloperation, increased extraly operating personnel's operation burden, reduced the operating efficiency of operation, and might cause CD-ROM drive motor to be stopped by mistake.

Summary of the invention

The purpose of this utility model provides a kind of operating personnel's of reduction operation burden and improves the electric angle grinder of operating personnel's operating efficiency.

In order to achieve the above object, the technical solution of the utility model has provided a kind of electric angle grinder, comprise housing, operation end at housing is provided with for the operation part that workpiece is carried out grinding or grinding, operation part is by the drive motor work of being located at housing, in the holding end of housing, be provided with switch block, by switch block CD-ROM drive motor is switched to "on" position or off-position, below switch block, be provided with action bars, the two ends of action bars connect respectively housing, be formed with for the gap that knob is installed at action bars, knob is positioned at this gap, be equipped with rotating dog at knob, the two ends of rotating dog are the attended operation bar respectively, at the rotating dog overcoat torsion spring is arranged, it is operating portion that knob is exposed to the outer part of action bars, it is characterized in that: a side that is positioned at the part of housing at knob is provided with projection, end at its opposite side is provided with the holding section, be provided with the back-up block that cooperates with this projection in the inboard of action bars, the side that is provided with holding section one side at knob is provided with extending column, extending column links to each other with housing, be provided with the depressed part that matches with the holding section in the end of extending column, when knob is in when closing lockup state, projection is pressed on the back-up block under the effect of torsion spring, when knob was in the open locking state, the holding section was fastened on the depressed part.

Preferably, the end that is positioned at the opposite side with described holding section of part of described housing at described knob is provided with guide part, the side that is provided with guide part one side at described knob is provided with lead, and when described knob is in when closing lockup state, guide part rests on the end of lead.

Preferably, described operation part comprises emery wheel, is provided with protective hood fastening device outside emery wheel, and described CD-ROM drive motor is by the rotation of drive motor emery wheel, wherein:

Protective hood fastening device comprises and covers on the outer cover body of emery wheel and be connected to protecgulum on the described housing, at a cover body side end face of the emery wheel formation anchor ear that stretches out dorsad, be provided with at least one boss in the inboard of anchor ear, be provided with at least one draw-in groove at the top of protecgulum, the quantity of draw-in groove is suitable with the quantity of boss, outer circumference surface at protecgulum has annular groove, the boss of anchor ear is by in the draw-in groove embedded rings connected in star, the tongue of pulling of spanner is located between anchor ear and the protecgulum at outside remainder, have shift slot at anchor ear, be provided with the gear tooth in the part of spanner between anchor ear and protecgulum, the gear tooth is stuck in the shift slot.

In a kind of electric angle grinder that the utility model provides, namely realized the state locking of electric angle grinder by simple structure, avoided to the full extent the generation of maloperation, simultaneously, after electric angle grinder is opened, realized the locking of state, the operating personnel need not often press action bars in operation process, reduce homework burden, improved operating efficiency, and avoided CD-ROM drive motor to be occured by the situation that mistake stops.

Description of drawings

Figure 1A is that a kind of electric angle grinder in the present embodiment is in the partial structurtes cutaway view when closing lockup state;

Figure 1B is the partial enlarged drawing of Figure 1A;

Fig. 2 is the partial structurtes cutaway view after a kind of electric angle grinder in the present embodiment rotates counterclockwise knob;

Fig. 3 is the partial structurtes cutaway view after a kind of electric angle grinder in the present embodiment is pressed action bars;

Fig. 4 is that a kind of electric angle grinder in the present embodiment is in the partial structurtes cutaway view under the open locking state;

The exploded view of the protective hood fastening device that Fig. 5 A provides for the utility model;

The installation diagram of the protective hood fastening device that Fig. 5 B provides for the utility model;

The scheme of installation of the protective hood fastening device that Fig. 6 A provides for the utility model;

The protective cover that anchor ear is housed that Fig. 6 B provides for the utility model;

Protecgulum in the protective hood fastening device that Fig. 6 C provides for the utility model;

The fixedly schematic diagram of the protective hood fastening device that Fig. 7 A provides for the utility model;

The top view of Fig. 7 A that Fig. 7 B provides for the utility model;

The adjusting protecting cover operating angle schematic diagram of the protective hood fastening device that Fig. 7 C provides for the utility model;

The top view of Fig. 7 C that Fig. 7 D provides for the utility model;

The dismounting schematic diagram of the protective hood fastening device that Fig. 8 provides for the utility model.

The specific embodiment

For the utility model is become apparent, hereby with preferred embodiment, and cooperate accompanying drawing to be described in detail below.

Shown in Figure 1A and Figure 1B, a kind of electric angle grinder that the utility model provides comprises housing 6, is provided with for the operation part 7 that workpiece is carried out grinding or grinding at the operation end of housing 6.In the drawing that present embodiment provides, operation part 7 is positioned at the left side.Operation part 7 is by the drive motor work of being located at housing 6.In the holding end of housing 6, be provided with switch block 5.In the drawing that present embodiment provides, holding end is positioned at the right side.By switch block 5 CD-ROM drive motor is switched to "on" position or off-position.When CD-ROM drive motor was in "on" position, operation part 7 began to carry out grinding or grinding, and when CD-ROM drive motor was in off-position, operation part 7 stopped grinding or grinding.Be provided with action bars 4 below switch block 5, action bars 4 is a bar part, and its two ends connect respectively housing 6.So that switch block 5 switches to "on" position with CD-ROM drive motor, after decontroling action bars 4, switch block 5 switches to off-position with CD-ROM drive motor to the operating personnel by push bar 4.Be formed with for the gap that knob 1 is installed at action bars 4, knob 1 is positioned at this gap.Penetrate a rotating dog 3 at the middle part of knob 1, the two ends of rotating dog 3 penetrate respectively in the action bars 4 so that knob 1 can be around rotating dog 3 rotations.At rotating dog 3 overcoats torsion spring 2 is arranged.It is operating portion 1a that knob 1 is exposed to the outer parts of action bars 4, the operating personnel by pulling operating portion 1a so that rotating dog 3 rotate.In the present embodiment, stretch out on the right side that knob 1 is positioned at the part of housing 6 and to be formed with projection 1b, end in its left side forms a holding section 1c, in the present embodiment, this holding section 1c such as hook-shaped, end on its right side forms a guide part 1d, and in the present embodiment, this guide part 1d is L shaped gathering sill.Extend upward the back-up block 4a that formation matches with projection 1b in the inboard of action bars 4.Be provided with extending column 6a in the left side of knob 1, extending column 6a links to each other with housing 6, the depressed part 6a-1 of the end of this extending column 6a for matching with holding section 1c.Be provided with lead 6b on the right side of knob 1.

Shown in Fig. 5 A and Fig. 5 B, protective hood fastening device 13 comprises that covering on emery wheel 14 outer cover body 13-1 reaches the protecgulum 13-6 that links to each other with housing 10.Cover body 13-1 dorsad the end face of emery wheel 14 1 sides stretch out and form anchor ear 2, be provided with boss e1, boss e2, boss e3, boss e4 and boss e5 in the inboard of anchor ear 13-2, have draw-in groove g1, draw-in groove g2, draw-in groove g3, draw-in groove g4, draw-in groove g5 at the top of protecgulum 6, draw-in groove matches with boss.Outer circumference surface at anchor ear 13-2 has annular groove 13-f, and annular groove 13-f also matches with boss, and the tongue of pulling of spanner 13-5 is located at the outside, and remainder is located between anchor ear 13-2 and the protecgulum 13-6 by upper mounted plate 13-3 and screw 13-4.Have shift slot 13-b at anchor ear 13-2, gear tooth 13-a is located on the spanner 13-5, and gear tooth 13-a is stuck in the shift slot 13-b, is provided with spring 7 between the outer circumference surface of spanner 13-5 and protecgulum 13-6.Cover body 13-1 and the anchor ear 13-2 13-8 that is welded into a whole.

Shown in Fig. 6 A to Fig. 6 C, when protective cover is installed: press lower ejector lever 13-5, boss e1 on the anchor ear 13-2, boss e2, boss e3, boss e4, boss e5 are aimed at respectively upper corresponding draw-in groove g1, draw-in groove g2, draw-in groove g3, draw-in groove g4, the draw-in groove g5 of protecgulum 13-6, protective cover is inserted among the protecgulum 13-6.The rotation protective cover, boss on the anchor ear 13-2 is embedded in the annular groove 13-f of protecgulum 13-6, rotate to the user desired position, unclamp simultaneously spanner 13-5, and make gear tooth 13-a on the spanner 13-5 block shift slot 13-b on the anchor ear 2, play spline, realize the installation of protective hood of grinding wheel.

Shown in Fig. 7 A to Fig. 7 D, fixing and when adjusting the protective cover operating angle: as to press spanner 13-5, it is along sliding in the chute of deep gouge 13-c among the protecgulum 13-6 and upper mounted plate 13-3 (annotate: upper mounted plate 13-3 is fixed on the protecgulum 13-6 by screw 13-4) formation, after the shift slot 13-b of the gear tooth 13-a of spanner 13-5 and anchor ear 13-2 throws off (seeing t1), it is rotatable protective cover, angle according to the job requirement adjusting protecting cover, unclamp spanner 13-5 after putting in place, under the elastic force effect of spring 13-7, gear tooth 13-a snaps among the shift slot 13-b and (sees t2), plays the location and prevents the effect that protective cover rotates.

As shown in Figure 8, dismounting is during protective cover: as long as spanner 13-5 is pressed, and protective cover 13-1 is rotated to the position corresponding with protecgulum 13-6, just desirablely go out protective hood of grinding wheel 13-1, decontrol simultaneously spanner 13-5.

As shown in Figure 1, when knob 1 is in when closing lockup state, projection 1b is being pressed under the effect of torsion spring 2 on the back-up block 4a, and guide part 1d then rests on the end of lead 6b, and at this moment, the operating personnel can't press action bars 4.

As shown in Figure 2, when the operation personnel need to start electric angle grinder, the operating personnel rotated counterclockwise knob 1 by operating portion 1a to the direction of arrow shown in Figure 2, and at this moment, projection 1b leaves back-up block 4a, and guide part 1d leaves the end of lead 6b.Then, as shown in Figure 3, the operating personnel presses action bars 4 to the direction of arrow shown in Figure 3 after, knob 1 is whole moving under the drive of action bars 4.As shown in Figure 4, be positioned at the top of depressed part 6a-1 as guide part 1d after, the operating personnel again by operating portion 1a with knob 1 to after direction is rotated counterclockwise as shown in Figure 4, after the hand of pinning action bars 4 is moved away, guide part 1d is being stuck under the effect of torsion spring 2 on the depressed part 6a-1 securely, at this moment, knob 1 is in the open locking state.

Claims

1. electric angle grinder, comprise housing (6), operation end at housing (6) is provided with for the operation part (7) that workpiece is carried out grinding or grinding, operation part (7) is by the drive motor work of being located at housing (6), in the holding end of housing (6), be provided with switch block (5), by switch block (5) CD-ROM drive motor is switched to "on" position or off-position, be provided with action bars (4) in the below of switch block (5), the two ends of action bars (4) connect respectively housing (6), be formed with for the gap that knob (1) is installed at action bars (4), knob (1) is positioned at this gap, be equipped with rotating dog (3) at knob (1), the two ends of rotating dog (3) are attended operation bar (4) respectively, at rotating dog (3) overcoat torsion spring (2) is arranged, it is operating portion (1a) that knob (1) is exposed to the outer part of action bars (4), it is characterized in that: a side that is positioned at the part of housing (6) at knob (1) is provided with projection (1b), be provided with holding section (1c) in the end of its opposite side, be provided with the back-up block (4a) that cooperates with this projection (1b) in the inboard of action bars (4), the side that is provided with holding section (1c) side at knob (1) is provided with extending column (6a), extending column (6a) links to each other with housing (6), be provided with the depressed part (6a-1) that matches with holding section (1c) in the end of extending column (6a), when knob (1) is in when closing lockup state, projection (1b) is being pressed under the effect of torsion spring (2) on the back-up block (4a), when knob (1) was in the open locking state, holding section (1c) was fastened on the depressed part (6a-1).

2. a kind of electric angle grinder as claimed in claim 1, it is characterized in that: the part that is positioned at described housing (6) at described knob (1) is provided with guide part (1d) with the end of the opposite side in described holding section (1c), the side that is provided with guide part (1d) side at described knob (1) is provided with lead (6b), when described knob (1) is in when closing lockup state, guide part (1d) rests on the end of lead (6b).

3. a kind of electric angle grinder as claimed in claim 1, it is characterized in that: described operation part (11) comprises emery wheel (14), outside emery wheel (14), be provided with protective hood fastening device (13), described CD-ROM drive motor is by drive motor emery wheel (14) rotation, wherein:

Protective hood fastening device (13) comprises and covers on the outer cover body (13-1) of emery wheel (14) and be connected to protecgulum (13-6) on the described housing (10), stretch out and form anchor ear (13-2) in a side end face of emery wheel (14) dorsad at cover body (13-1), inboard at anchor ear (13-2) is provided with at least one boss, top at protecgulum (13-6) is provided with at least one draw-in groove, the quantity of draw-in groove is suitable with the quantity of boss, outer circumference surface at protecgulum (13-6) has annular groove (13-f), the boss of anchor ear (13-2) is by in the draw-in groove embedded rings connected in star (13-f), the tongue of pulling of spanner (13-5) is positioned at outside remainder and is located between anchor ear (13-2) and the protecgulum (13-6), have shift slot (13-b) at anchor ear (13-2), the part that is positioned between anchor ear (13-2) and the protecgulum (13-6) at spanner (13-5) is provided with gear tooth (13-a), and gear tooth (13-a) is stuck in the shift slot (13-b).