CN201084897Y

CN201084897Y - On-off control mechanism of hand-held working machine

Info

Publication number: CN201084897Y
Application number: CNU2007201878292U
Authority: CN
Inventors: 陈恳
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-28
Filing date: 2007-09-28
Publication date: 2008-07-16
Anticipated expiration: 2017-09-28

Abstract

The utility model discloses a clutch controlling mechanism of the hand-held type working machine, both ends of a clutch drag cable are respectively connected with a clutch shifting fork arm and an operating handle, the operating handle is arranged on a handbar pipe through a handle seat, a return spring is arranged between the clutch shifting fork arm and the working machine body, the counteracting force of the spring and the clutch drag cable is opposite, the clutch is under the disconnection condition under the exertion of the spring force. The utility model realize the normal open working mode of the clutch through arranging the spring, therefore, the safety performance of the machine is improved, the clutch is automatically disconnected and the machine stops immediately after the operator accidentally let go of the control of the machine. Simultaneously, the engine is conveniently to be started, and no special clutch disconnection like the traditional normal close mode is required. Not only the clutch normal open of the utility model is realized, but also the cost of the utility model is very low, very few parts are added, no engine change is involved, and the change to the complete machine is small.

Description

On-off control mechanism of hand-held working machine

Technical field

The utility model relates to a kind of on-off control mechanism, and specifically the finger agricultural uses on-off control mechanism of hand-held working machine, this on-off control mechanism can make clutch be in normally open.

Background technology

The purpose of on-off control mechanism is the disconnection or the connection of solenoidoperated cluthes as required.The clutch of machine in normal service such as the operation principle of miniature cultivator, motorcycle etc. are normal on-state at present, and promptly normally closed type is not subjected to external force to do the time spent at clutch, and clutch is in on-state, and power is exported from the other end from the input of clutch one end.And the friction plate of working as clutch is subjected to external force to do the time spent, and clutch disconnects, and cuts off power output thus working machine is quit work.

For hand-held working machine (hand-held working machine is applied in agriculture field mostly, such as miniature cultivator, sower and grain header etc.), operator's both hands are gripped the walking of handle pipe random device and walk during its work.Because engine start moment need disconnect clutch, and clutch is connected during operate as normal, if adopt traditional normally closed clutch mode of operation, just need clutch be disconnected during startup, and decontrol manipulation after the operate as normal again on-off control mechanism by on-off control mechanism.Adopt such mode of operation for hand-held working machine, to have an apparent in view defective, this is because hand-held working machine (particularly agricultural tillage machinery) often occurs in the course of the work because ground injustice, big soil block and stone are stumbled to machine or operator's clod of earth causes the machine beat, rock even overturning, the operator is tripped, the appearance of the above-mentioned situation passive control that loses machine of operator often, for the sake of security, at this moment we often wish that machine can stop, and preferably stop automatically.Yet under the normally closed mode of operation of clutch, clutch remains connection, and machine still is in operating condition, and because the operator has lost the control to machine, so this running exists potential safety hazard, may damage machine self, operator or personage on every side.

Have above-mentioned defective based on the normally closed mode of operation of clutch, the related personnel of hand-held working machine wishes to change normally closed mode of operation into the operation mode that often goes into operation so that the machine works process is safer.In order to obtain the clutch of the operation mode that often goes into operation, those skilled in the art has carried out many improvement on clutch, paid many effort, but effect is all undesirable.This is because clutch itself is the parts that work is accurate, be installed in internal body, the machining accuracy height, certain part is changed to it, often relate to the change of relevant portion, need processing, die sinking again again, change the back complex structure, and the internal body space is limited, the change of clutch (particularly volume) will be subjected to great limitation, thus, certainly will significantly increase the complete machine cost, therefore even realized the clutch operation mode that often goes into operation by change, owing to the cost reason also is difficult to obtain promote.Up to the present, also do not find a desirable feasible way that addresses the above problem.

The utility model content

At the prior art above shortcomings, the purpose of this utility model provides a kind of clutch that can make and is in normally open and on-off control mechanism of hand-held working machine simple in structure, that cost is low.

The purpose of this utility model is achieved in that on-off control mechanism of hand-held working machine, comprise clutch shifter arm and clutch cable, the clutch cable two ends are connected with operating grip with the clutch shifter arm respectively, operating grip is located on the handle pipe by handle set, it is characterized in that: be provided with back-moving spring between described clutch shifter arm and the working machine fuselage, spring be positioned at the same end of clutch shifter arm with clutch cable and active force opposite, clutch is in off-state under the spring force effect.

The operating grip far-end is connected with handle set by shipping and reselling on another market, and the clutch cable top connection is connected with operating grip.

Further, be provided with spring base on the working machine fuselage, pass the adjusting bolt in the spring base, described back-moving spring is connected with adjusting bolt one end, and the bolt other end is provided with adjusting nut.By adjusting nut can regulating spring to the size of clutch shifter arm active force.

It also comprises connecting rod, described connecting rod two ends are respectively by bearing pin and handle set and operating grip flexible connection, be provided with chute at the handle set front end, described ship and resell on another market from chute, to pass the operating grip far-end is connected with handle set and can moves forward and backward along chute, the clutch cable top connection is connected with shipping and reselling on another market.

The utility model is owing to make the clutch shifter arm be subjected to a downward pulling force all the time by spring is set, and this pulling force is equivalent to traditional clutch cable active force, makes clutch be in off-state.Be provided with the clutch control crank on handrail, connect as making clutch, staff is depressed the clutch control crank and is given power that makes progress of clutch shifter arm by drag-line, and this is made every effort to overcome the clothes spring force clutch shifter arm is upwards lifted, and clutch is connected.In case staff unclamps, clutch shifter arm and clutch control crank return under the effect of spring force, clutch keeps off-state.That is to say, make the clutch combination, staff just must be depressed the clutch control crank always, no matter because what reason is unclamped, clutch just will disconnect, and make clutch realize often going into operation operation mode thus.This mode of operation has following benefit at least:

1, improved the security performance of hand-held working machine.In the overall process of machine works, the operator is keeping the control to machine always, and when the operator let go because of accident lose control to machine after, the clutch automatic disconnection stops on the mechanical horse.Therefore safety is guaranteed.

2, be convenient to the startup of engine.Because clutch often leaves, during startup, need not as traditional normally closed pattern, clutch to be disconnected, owing to itself just be in off-state, so the engine start of being more convenient for.

Simultaneously, by adjusting nut can regulating spring to the size of clutch shifter arm active force, this size has determined the size to the operating grip active force, therefore has the use flexible characteristic, different operator's active force differences can be adjusted to suitable degree by adjusting nut.

The utility model has not only changed the normally closed problem of clutch, realized often opening, and cost is very low, and the part of increase does not seldom relate to any change of engine, and is very little to the change of complete machine yet.

Description of drawings

Fig. 1-the utility model structural representation;

Fig. 2-handle portion vertical view.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

Referring to Fig. 1, from the figure as can be seen, on-off control mechanism of hand-held working machine of the present utility model, comprise clutch shifter arm 1, clutch cable 2, operating grip 3, handle set 4 and handle pipe 5, clutch cable 2 two ends are connected with operating grip 3 with clutch shifter arm 1 respectively, operating grip 3 far-ends 12 are connected with handle set 4 and the pin 12 that can rotate rotates by shipping and reselling on another market, and handle set 4 then is fixed on the handle pipe 5.Particularly, be provided with top connection 6 and lower contact at clutch cable 2 two ends, lower contact is connected (lower contact be blocked figure on can not see) with the clutch shifter arm, and top connection 6 is connected with operating grip 3.Between clutch shifter arm 1 and working machine fuselage 13 (being the casing on the fuselage during actual installation), be provided with clutch shifter arm back-moving spring 7, spring 7 be positioned at clutch shifter arm 1 same end with clutch cable 2 and active force opposite.Particularly, on the working machine casing, be fixed with spring base 15, be provided with through hole in the spring base 15, regulate bolt 16 and from through hole, pass, regulate bolt 16 two ends and expose outside the through hole.The end that described back-moving spring 7 is connected with fuselage hangs over regulates bolt 16 1 ends, regulate bolt 16 other ends and be provided with adjusting nut 17, by adjusting nut 17 can 7 pairs of clutch shifter arm 1 active forces of regulating spring size.Clutch 14 is in off-state under the spring force effect, and when operating grip 3 overcome spring tension by drag-line 2 with clutch shifter arm 1 during to the pulling of another direction, clutch 14 is in engagement state.

The operating grip of said structure is after staff unclamps, the pulling force of spring 7 rotates the handle 3 pullings pin 12 that rotates by clutch shifter arm 1 and drag-line 2 successively, handle 3 near-end liftings and handle pipe 5 shapes in an angle, under nature, handle 3 open angles are bigger, seem not attractive in appearance.For handle 3 open angles are lowered, the utility model also has additional connecting rod 8, and described connecting rod 8 one ends flexibly connect by bearing pin I9 and handle set 4 rear ends, and the other end flexibly connects with operating grip 3 about medium positions by bearing pin II 10.Be provided with the chute 11 of sealing at handle set 4 front ends, described shipping and reselling on another market 12 passed from chute 11 and operating grip 3 far-ends are connected with handle set 4 and can be moved forward and backward along chute 11.Clutch cable top connection 6 12 is connected with shipping and reselling on another market, i.e. clutch cable top connection 6 12 is connected with handle 3 by shipping and reselling on another market.Even after the release handle 3, under the involving of connecting rod 8, handle 3 open angles can be very not big yet like this.Simultaneously, when handle 3 upwards lifts under the effect of clutch spring tension, drag-line top connection 6 is then slided to the diagram left along chute 11, when pressing down handle 3 drag-line top connection 6 then along chute 11 to the diagram right-hand slip, effect by drag-line 2 makes clutch fork arm 1 be subjected to active force upwards, such design is except solving the excessive problem of handle 3 subtended angles, and another advantage is that the joint of drag-line 2 is rectilinear motion all the time, can bending does not fracture and its life-span is prolonged greatly.

Thereby the utility model is opened clutch with spring tension P1 and is made clutch not have power output to form normally open by the normally closed type on-state.When wanting machine works (power output); press the operating grip of hand-held working machine to be held in subordinate with handle pipe; thereby operating grip makes clutch fork arm be subjected to active force upwards the drag-line pulling and overcomes the pulling force that falls spring; thereby power that its maintenance is disconnected of just having removed clutch makes clutch be in on-state and makes complete machine be in working condition; like this Gong Zuo the advantage person that is the unattended operation why reason is left hand-held working machine, protection machine and operator thereby machine all can quit work immediately.

Because needing the operator operating grip 3 to be pressed down with handle pipe 5 in the course of the work is held in always, this just requires this active force can not be big, otherwise the aching and limp phenomenon of arm appears in operator easily, the utility model has just in time solved this problem, this is after depressing because of operating grip 3, the rotary pin shaft I9 of drag-line top connection 6 and operating grip 3 is arranged on the same straight line substantially, thereby make the operator when then beginning to press handle, exert oneself P2 more greatly, and thereby the very little strength of usefulness just can be pushed down operating grip the complete machine work that makes in the course of the work, the operator just can operate easily, and hand handle can be immediately by the spring force pull-up when decontroling, hand-held working machine can stop again immediately.

Claims

1. on-off control mechanism of hand-held working machine, comprise clutch shifter arm (1) and clutch cable (2), clutch cable (2) two ends are connected with operating grip (3) with clutch shifter arm (1) respectively, operating grip (3) is located on the handle pipe (5) by handle set (4), it is characterized in that: be provided with back-moving spring (7) between described clutch shifter arm (1) and the working machine fuselage (13), spring (7) be positioned at the same end of clutch shifter arm (1) with clutch cable (2) and active force opposite, clutch under the spring force effect (14) is in off-state.

2. on-off control mechanism of hand-held working machine according to claim 1, it is characterized in that: on working machine fuselage (13), be provided with spring base (15), pass in the spring base (15) and regulate bolt (16), described back-moving spring (7) is connected with adjusting bolt (16) one ends, regulates bolt (16) other end and is provided with adjusting nut (17).

3. on-off control mechanism of hand-held working machine according to claim 1 and 2 is characterized in that: operating grip (3) far-end is connected with handle set (4) by ship and resell on another market (12), and clutch cable top connection (6) is connected with operating grip (3).

4. on-off control mechanism of hand-held working machine according to claim 3, it is characterized in that: it also comprises connecting rod (8), described connecting rod (8) two ends flexibly connect by bearing pin (9,10) and handle set (4) and operating grip (3) respectively, be provided with chute (11) at handle set (4) front end, described shipping and reselling on another market (12) passed from chute (11) operating grip (3) far-end is connected with handle set (4) also and can moves forward and backward along chute (11), and clutch cable top connection (6) is connected with ship and resell on another market (12).