CN203655951U

CN203655951U - Balance type automatic clutch for mini-tiller

Info

Publication number: CN203655951U
Application number: CN201320853471.8U
Authority: CN
Inventors: 王德良; 罗清明
Original assignee: Jiaxing Chongqing Industrial Co Ltd
Current assignee: Jiaxing Chongqing Industrial Co Ltd
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-06-18
Anticipated expiration: 2023-12-23

Abstract

The utility model provides a balance type automatic clutch for a mini-tiller. The balance type automatic clutch comprises a driving disc, shoes and a driven cover. The shoes are mounted on the driving disc via shoe pins, and friction shoes which are used for being combined with the driven cover are fixed onto the shoes. The balance type automatic clutch is characterized in that positioning shaft shoulders which are protruded out of the driving disc are arranged on the shoe pins, the shoes are positioned by the aid of the positioning shaft shoulders, convex balancing stands are arranged on the surfaces, which are opposite to the driving disc, of the shoes, gaps are reserved among the top surfaces of the balancing stands and the driving disc, and clamp rings are arranged at the ends of the shoe pins, so that the shoes can be axially positioned. The balance type automatic clutch has the advantages that when the balance type automatic clutch is applied to the mini-tiller, the shoes of the clutch can keep balanced during work, the friction shoes can be stably and reliably combined with the driven cover, accordingly, power can be transmitted stably, and the clutch is long in service life and can be conveniently operated by users during operation.

Description

Microtilling machine balanced type automatic clutch

Technical field

The utility model relates to microtilling machine technical field, particularly relates to a kind of microtilling machine balanced type automatic clutch.

Background technique

Agricultural microtilling machine is taking small diesel engine or petrol engine as power, have lightweight, the feature such as volume is little, simple in structure, microtilling machine is widely used in the nonirrigated farmland, paddy field, orchard on Plain, mountain area, hills etc.The environment of microtilling machine work or landform have complexity and diversity, make it often need to adjust its working state, otherwise there will be fortuitous event in the time of farming operation, and now worker need to be stopped in emergency.At present, the clutch that Mini-tiller power device is connected with speed reducer adopts Normally closed type clutch mostly, Normally closed type clutch in working order time in bonding state, in the time of farming, need to stop and just must mediate clutch lever with hand separately, user operates inconvenience, there is certain potential safety hazard, even can cause security incident.And; this kind of Normally closed type clutch is in the time of not operation of microtilling machine; clutch friction plate and driven plate be long-term bonding state under pressure-acting still; under the long-term outage state between the spreadable life not, can make friction plate and driven plate be bonded together, while reusing; usually occur point be unableing to do without or separating phenomenon thoroughly; impact is normal to be used, the wearing and tearing that increased friction plate, the life-span of having reduced friction plate.

And common automatic clutch, hoof piece is arranged on the shoe pin fixing with driving disc, the end of each shoe pin is used respectively a collar and packing ring by hoof piece axial limiting, hoof piece can rotate around shoe pin under the effect of driving disc rotary centrifugal force, thereby brake pad fixing in its cambered surface is combined with driven cover, make power through driven cover to reducing gear transmission, but the hoof piece of this traditional automatic clutch is only subject to spacing along shoe pin axial direction at shoe pin assembly department, between the shoe pin assembly department of hoof piece bi-side and the bounding means of its both sides, there is gap, when outwards being thrown away, hoof piece occurs unavoidably rocking, when this automatic clutch is applied to the microtilling machine of powerful, when the work of hoof piece, rock aggravation, make the combination of brake pad and driven cover occur deflection, brake pad wearing and tearing are uneven, easily lost efficacy, and transmission of power is also greatly affected.

Model utility content

For addressing the above problem, the utility model proposes a kind of microtilling machine balanced type automatic clutch, it can apply to microtilling machine, and its centrifugal hoof piece can keep balance in the time of work, and brake pad and driven cover are in conjunction with steady, reliable.

The purpose of this utility model is achieved in that a kind of microtilling machine balanced type automatic clutch, comprise driving disc, hoof piece and driven cover, described hoof piece is arranged on driving disc by shoe pin, on hoof piece, be fixed with the brake pad for combining with driven cover, it is characterized in that: the location shaft shoulder on described shoe pin with the driving disc of emerging, the location shaft shoulder is joined and forms with the small diameter shaft of stretching out driving disc by the major diameter axle that is positioned at driving disc, described hoof piece is by locating shaft shoulder location, on the hoof piece surface relative with driving disc, be provided with the balancing stand of protrusion, between described balancing stand end face and driving disc, leave gap, shoe pin termination is provided with collar by hoof piece axially locating.

Further, the width of described balancing stand is 1/4 to 1/3 of hoof piece bi-side Extreme breadth.

Further, the two ends of described balancing stand are circular arc.

Further, described balancing stand 1-3 circular boss, balancing stand is near the free end of hoof piece.

Further, described balancing stand is the boss of an arc trend, and the arc trend of balancing stand moves towards consistent with the arc of hoof piece, and the length of balancing stand is 1/4 to 1/3 of hoof block length, and balancing stand is near the free end of hoof piece.

Further, be provided with annular balance back-up ring between described collar and hoof piece, described balance back-up ring leans against hoof piece outside, is provided with the mounting hole through whole shoe pins simultaneously on balance back-up ring.

The utility model arranges supplemental support in the side of hoof piece, outstanding balancing stand can make hoof piece with small gap-contact to driving disc, reduce the swing that hoof piece occurs at work, and the area of contact of balancing stand and driving disc is less, can't affect the work of hoof piece time, outwards open or inwardly regain, for further improving the balance of hoof piece, can install balance back-up ring additional in hoof piece outside, replaced the small washer using on each shoe pin in conventional clutch by a balance back-up ring, the outside that balance back-up ring is positioned at each hoof piece becomes the supplemental support of hoof piece, limit rocking of hoof piece, ensure brake pad and driven cover stable bond, thereby centrifugal clutch can be applied in powerful microtilling machine, just can realize combination and the disengagement of power by oiling and oil return, person's operation easy to use.And brake pad is not prone to eccentric wear, long service life yet.

The beneficial effects of the utility model are: when it applies to microtilling machine, clutch hoof piece can keep balance in the time of work, and brake pad and driven cover are in conjunction with steady, reliable, and transmission of power is stable, and long service life, operates when person's operation easy to use.

Brief description of the drawings

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

Fig. 1 is one of structural representation of the present utility model.

Fig. 2 is two of structural representation of the present utility model.

Fig. 3 is the partial enlarged drawing of Fig. 1.

Fig. 4 is the structural representation of the utility model balance back-up ring.

Embodiment

Below with reference to accompanying drawing, preferred embodiment of the present utility model is described.

Referring to Fig. 1 to Fig. 3, a kind of microtilling machine balanced type automatic clutch, comprise driving disc 1, hoof piece 2, extension spring 3 and driven cover 4, driving disc 1 is connected with bent axle by spline, in the card of driving disc 1, be fixed with three shoe pins 5, one hoof piece 2 is installed on each

shoe pin

5,2 of adjacent hoof pieces are connected by extension spring 3, on hoof piece 2, be fixed with the brake pad 6 for combining with driven cover 4, driving disc 1 and hoof piece 2 are positioned at driven cover 4, driven cover 4 is arranged on bent axle by bearing, and power can not be directly passed to driven cover 4 by bent axle.On shoe pin 5, there is the location shaft shoulder 51 of the driving disc 1 of emerging, the location shaft shoulder 51 is joined and forms with the small diameter shaft of stretching out driving disc by the major diameter axle that is positioned at driving disc, described hoof piece 2 is located by the location shaft shoulder 51, on hoof piece 2 surface relative with driving disc 1, be provided with the balancing stand 7 of protrusion, between described balancing stand 7 end faces and driving disc, leave gap.

Balancing stand 7 is near the free end of hoof piece 2, in the present embodiment, preferred balancing stand 7 is the boss of an arc trend, the arc trend of balancing stand 7 moves towards consistent with the arc of hoof piece 2, the length of balancing stand 7 is 1/4 to 1/3 of hoof piece 2 length, the width of balancing stand 7 is 1/4 to 1/3 of hoof piece 2 bi-side Extreme breadths, and the two ends of balancing stand 7 are circular arc.Certainly, balancing stand 7 can be also 2 circular boss, and circular balancing stand 7 is the free end of close hoof piece 2 also, thus the swing of restriction hoof piece 2.

As shown in Figure 4, on the shoe pin 5 in hoof piece 2 outsides, be coated with a balance back-up ring 8, the balance back-up ring 8 of annular leans against the outside of hoof piece 2, on balance back-up ring 8, be provided with three shoe pin mounting holes 81, with a balance back-up ring 8 simultaneously through three shoe pins 5, use respectively collar 9 by hoof piece 2 axially locating in the termination of each shoe pin 5, replaced the small washer using on each shoe pin 5 in conventional clutch by a balance back-up ring 8, the supplemental support that the outside that balance back-up ring 8 is positioned at each hoof piece 2 becomes hoof piece 2, has limited rocking of hoof piece 2.

The utility model is work like this, power passes to driving disc 1 via bent axle, driving disc 1 drives hoof piece 2 to rotate by shoe pin 5, in the time that operator raises speed oiling, speed of crankshaft increases, and hoof piece 2 overcomes the effect of extension spring 3 under the work of centrifugal force, hoof piece 2 outwards rotates and opens around shoe pin 5, when brake pad fixing on hoof piece 26 and driven cover 4 in conjunction with time, power passes to driven cover 4 by hoof piece 2, then is transmitted to the input shaft of speed reducer by driven cover 4.

The utility model arranges supplemental support in the bi-side of hoof piece 2, outstanding balancing stand 7 can make hoof piece 2 with small gap-contact to driving disc 1, reduce the swing that hoof piece 2 occurs at work, and balancing stand 7 is less with the area of contact of driving disc 1, can't affect when hoof piece 2 is worked and outwards open or inwardly regain, for further improving the balance of hoof piece 2, can install balance back-up ring 8 additional in hoof piece 2 outsides, ensure brake pad 6 and driven cover 4 stable bond, thereby centrifugal clutch can be applied in powerful microtilling machine, just can realize combination and the disengagement of power by oiling and oil return, person's operation easy to use.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a microtilling machine balanced type automatic clutch, comprise driving disc, hoof piece and driven cover, described hoof piece is arranged on driving disc by shoe pin, on hoof piece, be fixed with the brake pad for combining with driven cover, it is characterized in that: the location shaft shoulder on described shoe pin with the driving disc of emerging, the location shaft shoulder is joined and forms with the small diameter shaft of stretching out driving disc by the major diameter axle that is positioned at driving disc, described hoof piece is by locating shaft shoulder location, on the hoof piece surface relative with driving disc, be provided with the balancing stand of protrusion, between described balancing stand end face and driving disc, leave gap, shoe pin termination is provided with collar by hoof piece axially locating.

2. microtilling machine according to claim 1 balanced type automatic clutch, is characterized in that: the width of described balancing stand is 1/4 to 1/3 of hoof piece bi-side Extreme breadth.

3. microtilling machine according to claim 1 and 2 balanced type automatic clutch, is characterized in that: the two ends of described balancing stand are circular arc.

4. microtilling machine according to claim 3 balanced type automatic clutch, is characterized in that: described balancing stand 1-3 circular boss, balancing stand is near the free end of hoof piece.

5. microtilling machine according to claim 3 balanced type automatic clutch, it is characterized in that: described balancing stand is the boss of an arc trend, the arc trend of balancing stand moves towards consistent with the arc of hoof piece, the length of balancing stand is 1/4 to 1/3 of hoof block length, and balancing stand is near the free end of hoof piece.

6. microtilling machine according to claim 1 balanced type automatic clutch, it is characterized in that: between described collar and hoof piece, be provided with annular balance back-up ring, described balance back-up ring leans against hoof piece outside, is provided with the mounting hole through whole shoe pins simultaneously on balance back-up ring.