CN201615156U

CN201615156U - Safety clutch used on gear-box

Info

Publication number: CN201615156U
Application number: CN2010201355592U
Authority: CN
Inventors: 丁启东
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-03-17
Filing date: 2010-03-17
Publication date: 2010-10-27
Anticipated expiration: 2020-03-17

Abstract

The utility model provides a safety clutch used on a gear-box, which includes a transmission shaft, a driving gear, a driving clutch block and a driven clutch block, wherein the driving clutch block and the driven clutch block are fixedly connected on the transmission shaft and rotate smoothly; the driving clutch is connected with a spline of the transmission shaft; a plurality of groups of disk springs are arranged at the rear end of the driving clutch block; a plurality of trapezoid bosses are evenly arranged on an end surface of the driven clutch block; and a plurality of trapezoid grooves matched with the trapezoid bosses of the driven clutch block are evenly arranged on an end surface of the driving clutch block. The safety clutch can prolong the service life of farm machinery, and has the advantages of small volume, simple structure, large transmission torque and good overload protection effect.

Description

A kind of safety clutch that is used on the gearbox

Technical field

The utility model relates to a kind of mechanical device, more particularly relates to a kind of safety clutch that is used on the gearbox.

Background technique

In recent years, the agricultural machinery industry development rapidly, the mechanization agricultural machinery and implement that with the tractor are power are very general, these agricultural machinery and implement mostly are provided with gearbox, and these gearboxes do not have safe engaging and disengaging gear basically, when running into very big resistance or load when excessive, cause the damage of agricultural machinery and implement or the gear in the clutch to damage easily, make the agricultural machinery and implement cisco unity malfunction; Friction clutcch perhaps is housed, and friction clutcch is by spring extruding asbestos friction sheet transferring power, and when frequent overload, friction plate lost efficacy easily, did not reach safe effect; Shear clutch perhaps is housed, and shear clutch reaches antioverloading effect by cutting off guard pin, has no progeny but cut off, and transmission was both lost efficacy, and needs to change to cut off, and it is loaded down with trivial details to work.Both delay the farming time, and brought loss for again peasant user.

Summary of the invention

For overcoming the deficiencies in the prior art, the utility model provide a kind of when overload speed changer can be protected, and easy for installation, adjust convenient, long service life and can automatically reset safety clutch.

The utility model is realized by following concrete scheme: a kind of safety clutch that is used on the gearbox, comprise transmission shaft, driving gear, active clutch block and driven clutch block, fixedly connected with driving gear and can relatively rotate with transmission shaft in the back side of driven clutch block, initiatively clutch block is connected with splined driveshaft, initiatively the rear end of clutch block is provided with spacer, many group belleville springs are set between the front end of spacer and the active clutch block, the rear end of spacer is provided with bearing housing, the end of bearing housing is provided with locking nut, is provided with the end face bearing between bearing housing and the spacer.

In the such scheme, for the clutch that makes clutch effective, simultaneously again can transfer larger torque, at the end face of driven clutch block a plurality of trapezoid boss are set evenly, at the end face of active clutch block the trapezoidal groove that the trapezoid boss of a plurality of and driven clutch block is complementary is set evenly.

The utility model is a kind of be used on the gearbox safety clutch compared with prior art, its beneficial effect is:

1, owing to be provided with safety clutch, makes speed changer when overload, obtain effective protection, prolonged the working life of agricultural machinery and implement;

2, this kind safety clutch volume is little, and is simple in structure, owing to adopt the clutch mode of end face boss and end face groove, transmitting torque is big, and overload protection is effective.

Description of drawings

Fig. 1 is the form structure schematic representation of the utility model safety clutch;

Fig. 2 is the right elevation of part 6 among Fig. 1;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the left view of part 5 among Fig. 1;

Fig. 5 is the B-B sectional view of Fig. 4.

Among the figure: 1. transmission shaft, 2. gear box casing, 3. driving gear, 4. screw, 5. driven clutch block, 6. initiatively clutch block, 7. belleville spring, 8. spacer, 9. end face bearing, 10. locking nut, 11. bearing housing, 12. trapezoidal grooves, 13. trapezoid boss, 14. clutch chambeies, 15. drive cavities.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment a kind of safety clutch that is used on the gearbox of the utility model is further described:

Among Fig. 1, gear box casing 2 is provided with clutch chamber 14 and drive cavity 15, on one section transmission shaft 1 in clutch chamber 14 safety clutch mechanism is set.This safety clutch mechanism includes driven clutch block 5 and active clutch block 6, the end face of driven clutch block 5 and active clutch block 6 contacts, fixedly connected with driving gear 3 by screw 4 in the back side of driven clutch block 5, driven clutch block 5 and driving gear 3 smooth rotation on transmission shaft 1, initiatively the endoporus of clutch block 6 and transmission shaft 1 are connected by spline, be provided with spacer 8 in the rear end of active clutch block 6, the endoporus of spacer 8 matches with the cylindrical of active clutch block 6, many group belleville springs 7 are set between the front end of spacer 8 and the active clutch block 6, belleville spring 7 is enclosed within on the cylindrical of active clutch block 6, the rear end of spacer 8 is provided with bearing housing 11, be provided with end face bearing 9 between bearing housing 11 and the spacer 8, the end of bearing housing 11 is provided with two locking nuts 10, locking nut 10 is fixed on the screw thread of transmission shaft 1 end, is used for adjusting the impacting force of 7 pairs of actives of belleville spring clutch block 6 and locking.

Among Fig. 2, initiatively the end face of clutch block 6 evenly is provided with 4 trapezoidal grooves 12.

Among Fig. 3, the inclined-plane is arranged on the both sides of trapezoidal groove 12.

Among Fig. 4, the end face of driven clutch block 5 evenly is provided with 4 trapezoid boss 13.

Among Fig. 5, the inclined-plane is arranged on the both sides of trapezoid boss 13.

During proper functioning, initiatively clutch block 6 is in contact condition with driven clutch block 5 under the effect of belleville spring 7, when transmission shaft 1 rotates, driving initiatively by spline, clutch block 6 rotates, transmit by trapezoidal groove 12 and trapezoid boss 13 again and drive driven clutch block 5 and driving gear 3 rotations, power is input to carries out farmland operation on the agricultural machinery and implement.When agricultural machinery and implement run into big resistance; for example rotary blade is twined by weeds or runs into stone etc.; driving gear 3 is obstructed and can't rotates; under the effect on trapezoid boss 13 and trapezoidal groove 12 inclined-planes, initiatively the spline of clutch block 6 on transmission shaft 1 slides left, and belleville spring 7 is compressed; separate with driven clutch block 5 disengagements until active clutch block 6; like this, the power of tractor can't be delivered on the workpiece of agricultural machinery and implement, plays the effect of protection agricultural machinery and implement.Along with tractor continue move ahead, rotary blade separates with bar, overload disappears, initiatively clutch block 6 combines with driven clutch block 5 under the effect of belleville spring 7 automatically, the drive agricultural machinery and implement work on.

Agricultural machinery and implement have adopted this safety clutch, run into very big resistance or load and are effectively protected when excessive, reach to prolong the agricultural machinery and implement effect in working life.

Claims

1. safety clutch that is used on the gearbox, comprise transmission shaft, driving gear, active clutch block and driven clutch block, it is characterized in that: fixedly connected with described driving gear and can relatively rotate with described transmission shaft in the back side of described driven clutch block, between described active clutch block and the described transmission shaft spline is set, the rear end of described active clutch block is provided with spacer, many group belleville springs are set between the front end of described spacer and the described active clutch block, the rear end of described spacer is provided with bearing housing, the end of described bearing housing is provided with locking nut, is provided with the end face bearing between described bearing housing and the described spacer.

2. a kind of safety clutch that is used on the gearbox according to claim 1, it is characterized in that: the end face of described driven clutch block evenly is provided with a plurality of trapezoid boss, and the end face of described active clutch block evenly is provided with the trapezoidal groove that the trapezoid boss of a plurality of and described driven clutch block is complementary.