CN101007402A

CN101007402A - Portable tool

Info

Publication number: CN101007402A
Application number: CN 200610008706
Authority: CN
Inventors: 喻学锋
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2006-01-27
Filing date: 2006-01-27
Publication date: 2007-08-01

Abstract

The invention discloses a bimanual hand-held instrument. It includes tool main body, motor installed in said main body, work piece driven by said motor and former and rear handhold installed on said main body, said former and rear handholds are equipped with switch trigger device, further the former handhold includes driving device connected with switch trigger device, said driving device consists of a slide block with circular arc surface, further the switch trigger device of said rear handhold is connected with a driving device, said driving device consists of a pin matching with the circular arc surface of slide block, and the round axle of slide block circular arc surface is in coincidence with the pivotal axis of former handhold; when the switch trigger devices of said former and rear handhold are knobbed down by two hand of operator, the trigger switch is opened and drive workpiece starts work, the switch is closed just after one switch trigger device is releases by operator.

Description

Hand-held tool

Technical field

The present invention relates to a kind of hand-held tool, especially a kind of hand-held tool of bimanualness.

Background technology

Usually, the hand-held tool of bimanualness all is provided with the back handle that a relative tool body fixedly installs, simultaneously, proper site at instrument also may be provided with the front hand grip that a relative main body of energy pivots, the operating position of this front hand grip can carry out the adjusting of different angles as required, to satisfy the requirement of comfortableness operation; Simultaneously again for security consideration, all be provided with switch trigger gear on back handle and the front hand grip, have only when the switch triggering mechanism of the switch triggering mechanism of back handle and front hand grip is triggered simultaneously, be arranged in the handle switch startup that just can be triggered, could carry out driving work to instrument by motor; And only needing the operator to discharge any one switch trigger gear in above-mentioned master, the front hand grip, switch just can disconnect, thereby has cut off the driving work of instrument.

EP1400319A has disclosed a kind of shrub and hedge trimmer as the european patent application prospectus, these shrub and hedge trimmer are handheld tools of a kind of bimanualness, this tool body is provided with major and minor two handles, the relative shrub and hedge trimmer main body of back handle fixedly installs, then the shrub and hedge trimmer main body is pivotally connected relatively for front hand grip, therefore front hand grip relatively main body be pivoted, this front hand grip has two operating positions, first operating position is to be switched to position when being positioned at back handle the place ahead when front hand grip, and the second place is the position of front hand grip when being switched to the rear that is positioned at back handle; When described shrub and hedge trimmer are in above-mentioned two kinds of different operating positions, just can operate when all needing operator's both hands to trigger the switch trigger gear that is installed on main and auxiliary handle simultaneously; Because the trigger action of the flip flop equipment in this shrub and hedge trimmer front hand grip transmits by lever, cooperate transmission by the inclined-plane again between the lever, when front hand grip will be regulated between above-mentioned different operating position, and will be when the diverse location starting switch, the reliability of lever transmission action is not very high in the switch trigger gear of this front hand grip, therefore is easy to lose efficacy and can not starting switch.

Summary of the invention

For overcoming the deficiencies in the prior art, the invention provides a kind of simple in structure, safe and reliable and operate comfortable hand-held tool.

Technical scheme of the present invention is achieved in that a kind of hand-held tool, comprise tool body, be connected in the work package of main body, and be arranged at front hand grip and back handle on the described main body, wherein front hand grip is pivotally connected on the main body, described front hand grip is provided with the first switch triggering mechanism, back handle is provided with the second switch trigger mechanism, described front hand grip further comprises the transmission mechanism that is connected with switch triggering mechanism, described transmission mechanism comprises that one has the slide block of arc surface, the switch trigger gear of described back handle further is provided with and connects a rotating mechanism, described rotating mechanism comprises that the arc surface of a pin and slide block connects, and the circle core shaft of slide block arc surface and front hand grip pivotal axis overlap.Be provided with switch in the described back handle, the relative main body of described back handle fixedly installs; Described second switch trigger mechanism is provided with trigger button, and described back handle is provided with the grip part, and described trigger button is pivotally connected to handle grip portion; Described trigger button is provided with elastic component, and elastic component is used for the elastic reset after trigger button is pressed release; Described trigger button is provided with moving block, and described moving block can rotate relative to the trigger button pivot, and fixedly connects with connecting rod one end; The described first switch triggering mechanism is provided with trigger button, and described trigger button is pivotally connected to the front hand grip grip part; Described trigger button is provided with elastic component, and this elastic component is used for trigger button the resetting after discharging that be pressed; Described transmission mechanism comprises drive link and drive block, and described trigger button is connected with drive link, and described drive block is connected with drive link, and described drive link is provided with slide block, and described slide block is provided with arc surface; Described hand-held tool is shrub and hedge trimmer, and described work package is the tool section that radially extends.

Compared with prior art, the invention has the beneficial effects as follows no matter the operator is adjusted to any one operating position with assist handle, all can be effectively, the starting switch by the switch trigger gear of main and auxiliary handle reliably, not only improved the reliability of switch triggering, and helped the operator auxilliary handle is regulated to realize the comfortableness operation.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is that handheld tool of the present invention is faced directional profile figure;

Fig. 2 is the A-A direction partial sectional view along Fig. 1;

Fig. 3 is the switch trigger gear three-dimensional exploded view of handheld tool of the present invention;

Fig. 4 is the three-dimensional exploded view at another visual angle of switch trigger gear of handheld tool of the present invention;

Fig. 5 is the partial enlarged drawing by the I mark of Fig. 4;

Fig. 6 is by the partial elevation view of Fig. 5 along the A direction;

Wherein: 1, main body; 2, motor; 3, tool section assembly;

4, pivotal axis; 5, circle core shaft; 6, back handle;

7, front hand grip; 8, switch; 9, pivot;

10, switch triggering mechanism; 11, trigger button; 12, moving block;

12a, protuberance; 13, back-moving spring; 14, pivot;

15, pin; 16, grip part; 17a, grip part;

17a, side arm; 18, lead; 19, mounting hole;

20, switch triggering mechanism; 21, trigger button; 22, back-moving spring;

23, pivot; 24, transmission mechanism; 24a, drive link;

24b, drive block; 25, rotating mechanism; 26, flange part;

27, turning cylinder; 28, connecting rod; 29, torsion spring;

30, pressing plate; 31, moving block; 32, slide block;

33, circular arc bottom surface; 34, arc surface;

The specific embodiment

The present invention has come out with a kind of hand-held tool of bimanualness, this handheld tool is provided with major and minor two handles, being respectively applied for operator's left hand and right hand grips, be respectively equipped with switch triggering mechanism on above-mentioned master, the front hand grip simultaneously, have only the operator to press simultaneously and be located at switch trigger gear main, front hand grip respectively, could connect switch instrument is carried out driving work, now describe with specific embodiment.

With reference to shown in Figure 1, be a kind of shrub and hedge trimmer of bimanualness, it comprises shrub and hedge trimmer main body 1, be provided with motor 2 in the main body 1, and the tool section assembly 3 that drives work by motor 2, main body 1 is provided with the front hand grip 7 near tool section assembly 3, and be connected in main body 1 one ends and away from the back handle 6 of above-mentioned tool section assembly 3, wherein back handle 6 relative shrub and hedge trimmer main bodys 1 fixedly install, front hand grip 7 then is pivotally connected on the main body 1, and can be pivoted around pivotal axis 4 in the relative main body 1 of certain limit, the setting that front hand grip 7 is such, mainly be to consider that the operator can be according to the concrete operations situation, suitably regulate the work angle of front hand grip 7 and obtain the comfortable operating position an of the best, thereby can reduce labour intensity.Be provided with switch 8 in the back handle 6, back handle 6 is provided with the switch triggering mechanism 10 that starts this switch 8 in order to trigger, switch triggering mechanism 10 is provided with trigger button 11, this trigger button 11 is pivotally connected to the grip part 16 of back handle 6, and can rotate relative to back handle 6 pivots around pivot 9, one back-moving spring 13 is arranged in the housing of handle 6, with trigger button 11 effect of offseting, when the situation of trigger button 11 no external force effects, make power trigger button 11 is remained on initial position by the elasticity of back-moving spring 13.One moving block 12 is set on the trigger button 11 in addition, and this moving block 12 is rotationally connected by pivot 14 and trigger button 11.

With reference to shown in Figure 2, correspondingly also be provided with switch triggering mechanism 20 on the front hand grip 7, it comprises trigger button 21, this trigger button 11 is connected in the grip part 17 of front hand grip 7 by pivot 23, an and back-moving spring 22, this spring 22 and trigger button 21 effect of offseting are in when trigger button 21 under the situation of no external force effect, make power by the elasticity of back-moving spring 22 trigger button 21 is remained on initial position.Transmission mechanism 24 and relative pivot 23 trigger button 21 1 ends far away are connected, this transmission mechanism 24 comprises a positive drive bar 24a (for example steel wire) and a drive block 24b, described drive link 24a one end is connected with trigger button 11, the other end is connected with drive block 24b, the both ends of drive link 24a can be bent respectively during concrete the connection in certain angle is inserted in the perforate of trigger button 11 and drive block 24b, and this opening diameter is slightly larger than drive link 24a and allows passing of drive link 24a, and then drive link 24a bending certain angle is fastened on connecting portion with it.Because drive link 24a is rigid member, take above-mentioned connected mode again, so drive link 24a relatively trigger button 11 produce certain amount of spin, also can be to the certain amount of spin of phase drive block 24b generation.In addition, because drive block 24b is provided with a mounting hole 19 in the radial direction at it, be provided with a lead 18 corresponding to this mounting hole 19 in handle 7 inwalls, and this lead 18 extends insertion mounting hole 19 and gives drive block 24b a guide effect, and the drive block 24b that is arranged so that drive block 24b is such can only produce the displacement of radial direction and can not carry out deflection.Transmission mechanism 24 is arranged so that so trigger button 21 is when being subjected to the operator and putting on the trigger action power of trigger button 11, trigger button 21 just relatively pivot 23 rotate, the rotatablely moving of this trigger button 21 is passed to drive block 24b through drive link 24a makes drive block 24b produce axial displacement.

With reference to shown in Figure 3, drive block 24b is L-shaped, this L shaped vertical position is connected with drive link 24a, its horizontal position is then matched with rotating mechanism 25, rotating mechanism 25 shown in Figure 1 is arranged in the main body 1, it comprises moving block 31, and be arranged at turning cylinder 27 on the moving block 31, be arranged at the torsion spring 29 on the

turning cylinder

27,29 of this torsion springs are mainly used in rotating mechanism 25 resetting after turning on a certain position, turning cylinder 27 plugs in the perforate of pressing plate 30 and can move pivotally with respect to pressing plate 30, and pressing plate 30 fixedly is coupled in handle 7 housings, and it mainly is that rotation pivot 26 is mainly played a position-limiting action that pressing plate 30 is provided with.Also be provided with a flange part 26 on the moving block 31, an end of this flange part 26 and connecting rod 28 fixes and connects.Trigger button 11 head lamp brush guard pivots connect a moving block 12, and these moving block 12 ends are provided with a protuberance 12a, protuberance 12a rotates with the pivot of moving block 12, the other end of connecting rod 28 is fixedly connected on the protuberance 12a of moving block 12, therefore when trigger button 11 rotates under the effect of operator's application of force, drive moving block 12 and protuberance 12a thereof and do corresponding the rotation; When trigger button 22 rotates under the effect of operator's application of force, and this rotational action by transmission mechanism 24 and rotating mechanism 25 be passed to connecting rod 28, connecting rod 28 again with this force transmission to moving block 12, impel moving block 12 to rotate; When the trigger button 21 of the trigger button 11 of trigger mechanism 10 and trigger mechanism 20 is not operated the person simultaneously and triggers, moving block 12 will produce two and trigger the amounts of spin that cause by above-mentioned two trigger mechanisms, can impel moving block 12 to trigger when these two amounts of spin stacks to be arranged at the switch 8 in the handle 6 and start.To be elaborated with the relation of connecting to the transmission of transmission mechanism 24 below with rotating mechanism 25.

With reference to Fig. 4, shown in Figure 5, drive block 24b is L-shaped, and the slide block 32 that its L shaped horizontal position is a hollow cylinder shape, this slide block 32 are provided with arc surface 34 in hollow cylinder in the end, and the bottom surface 33 of this slide block 32 also is circular arc; Rotating mechanism 25 is big to shape setting triangular in shape, on two angle point, be respectively arranged with turning cylinder 27 and flange part 26, at this leg-of-mutton the 3rd corner location place one pin 15 is set in addition, this pin 15 is extended with certain length, and slides preferably with the arc surface 34 of above-mentioned drive block 24b and to connect.Therefore, when operator's button trigger button 21, trigger button 21 produces the drive link 20a that moves pivotally by transmission mechanism 20 and is passed to drive block 24b, make drive block 24b integral body produce displacement along mounting hole 19 radial direction, the transverse slider 32 of drive block 24b will drive the displacement of the above-mentioned direction of pin 15 generations that slip with it connects this moment, the displacement of pin 15 then drives moving block 31 and walks around around pivot 27, and the rotation of moving block 31 can drive the pivot that its flange part 26 is made respective angles, because connecting rod 28 is fixedly connected between the protuberance 12a of flange part 26 and moving block 12, therefore the rotation of flange part 26 is passed to moving block 12 by connecting rod 12, impels moving block 12 relative trigger buttons 11 to make certain angle and pivots; Trigger button 11 rotates around pivot 9 under operator's trigger action in addition, and moving block 12 produces after above-mentioned two rotations and offsets and final trigger switch 8 with switch 8 contacts; As long as the operator presses the trigger button of trigger mechanism 10 and trigger mechanism 20 respectively, just can start the switch 8 that is arranged at handle effectively like this.Therefore no matter the operator carries out front hand grip 7 adjusting of different angles in the angular range of setting, because pin 15 slides well with circular arc end face 34 all the time and connects, and can both impel the trigger action of trigger button 21 can drive to rotor 12 effectively and then trigger switch 8 is effectively arranged.

With reference to shown in Figure 6, arc surface 34 has a radian on the slide block 32, and the pairing circle of this radian has a circle core shaft 5; Because front hand grip 7 is around pivotal axis 4 rotations, and slide block 32 is arranged in the side arm 17b of front hand grip 7, therefore make overlapping of pivotal axis 4 and this circle core shaft 5 when being provided with, make front hand grip 7 when angular adjustment on the slide block 32 arc surface 34 realize connecting preferably with the pin 15 of rotating mechanism 25.

The insider knows, hand-held tool for bimanualness, being provided with of double acting switch mainly is the consideration that triggers for switch safety, therefore, as long as the operator discharge trigger button 11 and trigger button 21 one of them, switch 8 just can be closed and cut-out work, has only operator's both hands all to be held in the instrument corresponding site and presses the switch triggering button simultaneously, and switch 8 just can be activated; If discharge trigger button 11 as operator in the present embodiment, then trigger button 11 can return back to initial position under the effect of back-moving spring 13, thereby drive the certain angle of moving block 12 revolutions, moving block 12 makes the triggering state that can't keep switch 8 like this; Simultaneously when the operator discharges trigger button 21, because the active force to back-moving spring 22 makes trigger button 21 return back to initial position, this moment, the homing action of trigger button 21 drove resetting of driving member 24 and tumbler 25, finally impelled connecting rod 28 to drive moving blocks 12 revolutions and made moving block can't keep triggering state to switch 8.Therefore, if the operator discharge trigger button 11 and trigger button 21 one of them, switch 8 just can be closed and cut-out work.

Claims

1. hand-held tool, comprise tool body (1), be connected in the work package (3) of main body (1), and be arranged at front hand grip (7) and back handle (6) on the described main body (1), wherein front hand grip (7) is pivotally connected on the main body (1), described front hand grip (7) is provided with switch triggering mechanism (20), back handle (6) is provided with switch triggering mechanism (10), it is characterized in that: described front hand grip (7) further comprises the transmission mechanism (24) that is connected with switch triggering mechanism (20), described transmission mechanism (24) comprises that one has the slide block (32) of arc surface, the switch trigger gear (10) of described back handle (6) further is provided with and connects a rotating mechanism (25), described rotating mechanism (25) comprises that a pin (15) and the arc surface (34) of slide block (32) connect, and the circle core shaft (5) of slide block arc surface (34) overlaps with front hand grip (7) pivotal axis (4).

2. hand-held tool according to claim 1 is characterized in that: be provided with switch (8) in the described back handle (6), described back handle (6) main body (1) relatively fixedly installs.

3. hand-held tool according to claim 1 is characterized in that: described switch triggering mechanism (10) is provided with trigger button (11), and described back handle (6) is provided with grip part (16), and described trigger button (11) is pivotally connected to handle grip portion (16).

4. hand-held tool according to claim 3 is characterized in that: described trigger button (11) is provided with elastic component (13), and elastic component (13) is used for the elastic reset after trigger button (11) is pressed release.

5. hand-held tool according to claim 3 is characterized in that: described trigger button (11) is provided with moving block (12), and described moving block (12) can rotate relative to trigger button (11) pivot, and fixedly connects with connecting rod (28) one ends.

6. hand-held tool according to claim 1 is characterized in that: described switch triggering mechanism (20) is provided with trigger button (21), and described trigger button (21) is pivotally connected to front hand grip (7) grip part (17a).

7. hand-held tool according to claim 6 is characterized in that: described trigger button (21) is provided with elastic component (22), and this elastic component (22) is used for trigger button (21) the resetting after discharging that be pressed.

8. hand-held tool according to claim 6, it is characterized in that: described transmission mechanism (24) comprises drive link (24a) and drive block (24b), described trigger button (21) is connected with drive link (24a), described drive block (24b) is connected with drive link (24a), described drive link (24a) is provided with slide block (32), and described slide block (32) is provided with arc surface (34).

9. hand-held tool according to claim 1 is characterized in that: described hand-held tool is shrub and hedge trimmer, and described work package (3) is the tool section that radially extends.