Self-locking differential cam

 

The invention relates to the transport industry, in particular to the structure of the cross-axle differential mechanisms. The differential includes coaxial inner 1 and outer 2 stars and is located between them were taken with breadcrumbs 3. The surface of crackers 3 in contact with the lobes of the inner sprocket 1 made in the form of 3 paired plots - 2 concave with a curvature corresponding to the arc of the Cam inner sprocket 1, and located between them, convex. The technical result is an increase in smooth operation, reliability, durability differential in vehicles with high cross. 4 Il.

The invention relates to a transport engineering, and more specifically to the structure of the cross-axle differential mechanisms.

Known self-locking differential Cam, satisfying the basic equation of kinematics, differential, contains coaxial inner and outer Cam sprocket located between them drove (separator) with crackers (plungers), while sliding in the holes of the carrier and the Cam surfaces of stars [1].

The sliding friction of crackers on the carrier and the surface of the Cams Svisloch bridge due to the different conditions of adhesion of the wheels with the ground.

A significant disadvantage of this technical solution is that the surface of the Cam inner sprocket and contacting the surface of the crackers have profiles that are directed to each other by the convex sides. This, as shown by theoretical and empirical research, provides a very small area of contact between these surfaces, contributes to their rapid deterioration and disturbance of the kinematic compliance of the contacting surfaces of the parts, which leads to unevenness in the differential and it stuck.

The technical result achieved by the claimed solution is a significant increase in the area of the contacting surfaces of crackers and sprockets, enhancing the smooth operation, reliability and durability of the differential of the vehicle.

This result is achieved in that in cambiocorsa Cam differential containing coaxial inner and outer sprocket and located between them were taken with crackers, simultaneously sliding along the surface of the stars and in the holes of the carrier, the surface of the crackers that come in contact with the lobes of the inner sprocket is made in the form of 3 paired plots - 2 concave with a curvature which technical solution is illustrated in the drawings, where:

Fig.1 is a longitudinal section of the Cam conventional prefilled auto-disable differential.

Fig.2 - section a-a in Fig.1.

Fig.3 - type B on crackers installed in the driver differential.

Fig.4 is a geometric construction of Cam profiles of the inner and outer sprockets and crackers conventional prefilled auto-disable Cam differential.

Self-locking differential Cam includes an inner 1 and outer 2 stars and the twenty-four rusk 3 located in a radial hole drove 4 two rows with shift them around the circumference of a half-step and fixed against rotation flats 5 and spacer rings 6 and 7. Led 4 is connected to the Cup 8 of the differential housing and is a leading link. Stars are slave units.

On the outside of the sprocket 2 evenly spaced around the circumference of the six Cams 9, on which slide the crackers 3 both series. On the inside of the sprocket 1 has two independent series of six evenly spaced around the circumference of the Cam 10, which also slide crackers 3. The Cams 10 of one row are displaced circumferentially relative to another row of a half-step. Working surfaces of the Cams 9 and 10 stars 1 and 2 is carried out by arcs of circles. The profile of the Cam 10 inner sprocket 1 obezdka 2 is formed of arcs of circles with centers at the points and the corresponding radii.

Working surfaces crumbs 3 Cam differentials also perform on arcs of circles. The profiles of these surfaces symmetric about the midline OO1and formed by arcs of circles with centers at the points C, C1, D and E. the Profile of rusk, working on the inner sprocket 1 has three paired plots, two of which are concave with the centers of arcs of circles C and C1and the third, located between them - convex with center D. This is in comparison with the prototype increases when the mechanism of the contact area of crackers and sprockets, most significantly in a pair of biscuit and internal asterisk on the biscuit more than 3 times.

Flat flats on the side of rusk 3 do not allow rotation of rusk in the nest drove install spacer rings 6 and 7 between the rows of crackers.

Works with a limited-slip differential as follows.

If the angular velocity of stars are the same, then the breadcrumbs 3 with respect to the stars and drove remain motionless. This occurs when the vehicle is moving in a straight and level road. When driving on turn one star associated with the runner wheel, ahead of the leading led and the other sprocket is exactly the same behind him.

At the same time, vodka they move on the surface of the Cams. The opposite ends of the crackers are similarly inclined surface of the other stars, causing it to rotate with angular velocity greater than the angular velocity drove.

The sliding friction of crackers on the carrier and the surface of the Cams provides the differential lock when the difference between the torque axes, which gives rise increasing the vehicle.

The use of conventional prefilled auto-disable Cam differential of the vehicle, installed in the leading bridges, makes better use of the coupling weight attributable to the drive wheels to increase traction on the wheels, increases permeability, increases the possibility of driving on slippery slopes, improves the stability of motion in heavy traffic conditions.

Sources of information

[1]. Differential wheeled vehicles /A. F. Andreev, V. Century Vantsevich, A. H. Liferov. Under the General Ed. by A. H. Legerova. - M.: Mashinostroenie, 1987. - 176 p; ill. with 71-75 prototype.

Claims

Self-locking differential Cam containing coaxial inner and outer sprocket and located between them were taken with crackers, while sliding on the surface of the star is ezDock, made in the form of 3paired plots - 2 concave with a curvature corresponding to the arc of the Cam inner sprocket and located between convex.

 

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