CN2050107U

CN2050107U - Differential mechinism lockup device for small four-wheel tractor

Info

Publication number: CN2050107U
Application number: CN 89201296
Authority: CN
Inventors: 金得奎
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-01-26
Filing date: 1989-01-26
Publication date: 1989-12-27

Abstract

The utility model discloses a differential mechanism lockup device, which is especially suitable for a 12-15 HP small four-wheel tractor. The differential mechanism lockup device comprises an eccentric shaft, a slider, a tooth embedding type clutch collar, a tooth embedding type differential carrier cover and an operating handle, etc. The utility model has the advantages of simple structure, convenient operation and low cost, and can be realized by doing little alteration on the base of the rear axle structure of existing national small four wheel tractors. The utility model can also be used on tractors and motor vehicles of the other types.

Description

Differential mechinism lockup device for small four-wheel tractor

The utility model provides a kind of differential lock device, is specially adapted to 12～15 horsepowers of tractor with small four wheels.

At present, domestic 12～15 horsepowers of tractor with small four wheels all are not provided with differential lock device (hereinafter to be referred as differential lock).This class tractor travels on the country road in rural area mostly, and pavement quality is generally relatively poor, and tractor often draw load-carrying nearly the trailer of 2～3 tons of goods travel.When one side driving wheel travels when seriously skidding on mire or ice and snow road, and the another side driving wheel is often on road surface preferably, make tractor can not roll slippery road surface owing to differential mechanism has the not poor characteristics of turning round of differential this moment, therefore, the user wishes that urgently tractor with small four wheels also can install differential lock.But because the tractor with small four wheels of producing has become approved product now, structural type and production technology have determined it the differential lock device that has tractor now directly can not to be used on the tractor with small four wheels.Moreover the main member of the operating mechanism of this class device is respectively by pedal, slide bar, shift fork; Handle, shift fork, slide bar; Handle, drive link, shift fork lever pin, have compositions such as the shifting fork bar of cranking arm, shift fork, complex structure, cost height, inconvenient installation, maintenance and maintenance.

The purpose of this utility model provides a kind of improved differential lock device, it not only has simple in structure, handiness, the characteristics of low cost of manufacture, and being particularly suitable for 12～15 horsepowers of tractor with small four wheels installations, the tractor of other type and Motor Vehicle also can adopt.

The utility model is achieved in that an end eccentric part of an eccentric shaft embeds or embeds by a slide block in the annular groove of castellated clutch collar, and the other end is connected with Joystick or other actuating element.Move handle and make the eccentric shaft rotation, then clutch collar is locked into one differential carrier and semiaxis engaging with castellated differential-housing cover or with the fixedly claw collar that is enclosed within on the differential-housing cover diameter of axle cylindrical with the spline form under the promotion of eccentric shaft and slide block.

Directly embed or only embed in the annular groove of clutch collar because characteristics of the present utility model are ends of the eccentric shaft that is connected with Joystick by a slide block, so structure is simple especially, manufacture cost is very low, is particularly suitable for tractor with small four wheels and installs on the basis of existing structure.

Concrete structure of the present utility model is provided by following examples and accompanying drawing:

Fig. 1 is a main sectional view of the present utility model.

Fig. 2 is a partial sectional view of the present utility model.

Eccentric shaft 5 penetrates axle shaft housing 10 perpendicular to semiaxis 11, and its eccentric part 8 embeds or embeds in the annular groove 9 of castellated clutch collar 2 by slide block 12.The hole of slide block 12 and both ends of the surface 13 cooperate with eccentric part 8 and groove 9 respectively, and it can rotate around eccentric part 8 neatly, slides along groove 9.The end of the limiting stopper 7 that is connected with axle shaft housing 10 is stuck in the groove of eccentric shaft 5, with the axial displacement of restriction eccentric shaft 5.The top of eccentric shaft 5 connects one handle 4.Eccentric shaft 5 rotation when moving Joystick 4, eccentric part 8 drive or drive castellated clutch collar 2 by slide block 12 and move on spline semiaxis 11, engage with castellated differential-housing cover 1 or separate.One end of return spring 6 hangs over the root of handle 4, and the other end is stuck in the root of axle shaft housing 10.Eccentric shaft 5 makes eccentric shaft go back to original position by the elastic force that reverses of return spring 6 when release handle 4, castellated clutch collar 2 is separated with differential-housing cover 1 or engages.Eccentric shaft 5 has annular groove with axle shaft housing 10 mating parts, and the inside is laid oil sealing 3 and revealed to stop gear oil.

From above embodiment as can be seen: on the basis of bridge construction behind the existing tractor with small four wheels, only need differential-housing cover is made castellated, axle shaft housing (being adpting flange or sleeve joint) root is offered the hole that cooperates with eccentric shaft, prolong the spline of semiaxis, penetrate eccentric shaft, castellated clutch collar and other relevant part can be realized.Consider that moment of torsion that clutch collar bears is big and problem such as concentrate at the stress that the perforate of axle shaft housing root causes, then as long as suitably increase the size and the mechanical strength of this class part and the box body hole that cooperates with it just passable.So basically just can on the production line of existing tractor with small four wheels, produce tractor with small four wheels, therefore, can improve the competitive capacity of product on market with differential lock device.This device also can be in the tractor and the Motor Vehicle of other type.

Claims

1, a kind of differential lock device that is specially adapted to tractor with small four wheels, it is by castellated differential-housing cover 1, castellated clutch collar 2, Joystick 4, compositions such as return spring 6 and spline semiaxis 11 is characterized in that:

A, eccentric shaft 5 are connected with handle 4, and its eccentric part 8 embeds or embeds in the annular groove 9 of castellated clutch collar 2 by slide block 12,

B, move handle 4 and can make eccentric shaft 5 drive castellated clutch collar 2 on spline semiaxis 11, to move, realize combining with castellated differential-housing cover 1, release handle 4, return spring 6 can make its separation,

C, limit element 7 embed in the groove of eccentric shaft 5, with moving axially of restriction eccentric shaft 5.

2, differential lock device as claimed in claim 1 is characterized in that the hole of slide block 12 cooperates with eccentric part 8, and both ends of the surface 13 cooperate with annular groove 9.

3, differential lock device as claimed in claim 1 or 2 is characterized in that eccentric shaft 5 and axle shaft housing 10 mating parts have the oil sealing 3 that can stop gear oil to be revealed.