JPS6383434A - Differential gear device having differential control mechanism - Google Patents

Abstract

PURPOSE:To transmit a differential movement according to a rotational angle of a steering wheel to a drive wheel and to prevent an unnecessary differential movement caused by a road surface or the like, by assembling a controllable pinion effecting the same rotation as a differential pinion of a differential gear and a control gear meshing therewith. CONSTITUTION:A clockwise rotation of an input shaft 1 causes a drive gear 2 to rotate, which rotates a differential case 3 in an upward direction by the same rotation. If a control gear 8 effects the same rotation as the case 3 in the instance, a control pinion 7 and a differential pinion 5 do not rotate so that no difference in rotation is caused in side gears 4, 5. Next, when the control gear 8 is rotated at a speed higher than the case 3, the control pinion 7 causes a differential pinion 6 to rotate counterclockwise with a result that the side gear 5 rotates at a speed higher then the side gear 4. When the control gear 8 rotates at a speed slower than the case 3, the side gear 5 rotates at a speed slower than the side gear 4 in the same manner. With the arrangement, a difference in rotation of right and left drive wheels of an automobile is produced in proportion to an angle of a steering wheel, whereby a differential movement greater than a necessary movement is not produced.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a differential gear device that allows the differential amount of shaft output of the differential gear device to be changed arbitrarily.

(B) Conventional technology In conventional milling wheels, the difference in rotation between the inner ring and outer ring that inevitably occurs due to the direction rotation is absorbed by a differential gear device, but the conventional device does not depend on the driver's will. Irrespective of this, the differential also occurs depending on the road surface and the running layer, and this was considered to be unavoidable when driving a car.

(C) Problems to be Solved by the Invention This invention aims to transmit a differential that corresponds to the rotation angle of the steering wheel of the automobile driver to the left and right power shafts, and to The purpose is to prevent unnecessary differentials from occurring.

(d) Means for Solving the Problems An embodiment of the present invention as a differential gear device for an automobile will be described below with reference to the drawings.

The one shown in the first figure is a known differential gear device with a differential control mechanism added thereto.

A control pinion 7 that can rotate in the same manner as the differential pinion 6 is integrated with the differential case 3 from the outside.

The control gear 8 has a shaft that can rotate independently from the rotation of the differential case 3, and meshes with the control pinion 6.

(E) Operation In FIG. 1, the clockwise rotation of the input shaft 1 rotates the drive gear 2, and the same rotation rotates the differential case 3 upward.

At this time, if the control gear 8 rotates the same as the differential case 3, the control pinion 7 and the differential pinion 6 do not rotate, and no difference in rotation between the side gears 4.5 occurs.

If the control gear 8 is rotated faster than the differential case 3 by some means, the control pinion 7 causes the differential pinion 6 to rotate counterclockwise.

As a result, side gear 5 rotates faster than side gear 4.

Furthermore, when the control gear 8 rotates slower than the differential case 3, the side gear 5 similarly rotates slower than the side gear 4.

In order to explain one effect, which is different from the present invention, FIG. 2 shows an example of a device for controlling the rotation of the control gear 8.

A main drive control shaft 9 that rotates at the same time as the input shaft 1 is connected to a driven control shaft 10 via a drive belt 12 from a continuously variable speed pulley 11.
The rotation is transmitted to the driven control shaft 10, and the driven control shaft 10 is
The gear has the same ratio as the engagement between the main control shaft 9 and the drive gear 2, and is engaged with the control gear 8.

If the continuously variable speed pulley 11 rotates the same as the main shaft 9 and the slave shaft 10, the control gear 8 rotates the same as the differential case 3.

When the rotation of the continuously variable transmission pulley 11 changes its gear ratio so that the rotation of the slave shaft 10 becomes faster, the control gear 8 rotates faster than the differential case 3, and the rotation of the side gear 5 is accelerated.

Also, when the gear ratio is changed so that the rotation of the continuously variable pulley 11 slows down the rotation of the slave shaft 10, the control gear 8 rotates slower than the differential case 3, and the side gear 5 rotates slower than the side gear 4. Rotate slowly.

(Regardless of whether these rotations are forward rotation, reverse rotation, or slow speed,
Can be controlled in all ranges. ) If the speed change ratio of this speed change pulley 11 is selected to be proportional to the steering wheel angle of the automobile,
You can choose the amount of differential between the left and right wheels.

Furthermore, the control gear 8 works to prevent it from idling or shifting automatically depending on the road surface and driving conditions.

6) Effects of the Invention As explained above, this invention creates a rotation difference between the left and right drive wheels of an automobile in proportion to the driver's steering wheel angle by incorporating a control gear control pinion that enables control. It has been carefully designed to be able to do this, and this result has a similar effect.

(1) No more than necessary differential is created, and the wheel will not spin on one side on icy roads or muddy surfaces, or a wheel on one side may drop, causing the vehicle to become unable to drive or steer.

(2) In response to the sideways inertia caused by road curves, in conventional differential gear systems, an opposite force is generated by the action of the device itself, which causes the outer ring to rotate faster and the inner ring to rotate faster. This may cause the vehicle to swell, causing the vehicle to veer off the road and cause an accident.

However, when single-wheel control is performed, a differential is applied to the drive wheels according to the steering wheel angle, so no matter how much lateral inertia occurs, the outer wheels rotate faster than the inner wheels, making it difficult to deviate from the road. Become.

(3) This makes it possible to rotate according to the steering wheel, which reduces the difference in curve turning skills between an inexperienced person and an expert person, and is thought to greatly contribute to traffic safety.

(4) When a car rotates, the difference in rotation between the drive shafts always acts as an effect, so it seems possible to handle the car with less force.

[Brief explanation of the drawing]

FIG. 1 shows a top view of an embodiment of the differential gear device of the present invention. FIG. 2 shows an example of the device for controlling the control gear of the present invention, and shows in a sectional view how the device can be controlled in combination with the device. 1...Input shaft 2...Lψ moving gear 3...
Differential case 4... Side gear left 5... Side gear right 6... Differential pinion 7... Control pinion 8... Control gear 9... Main drive control shaft 10...
・Followed control shaft 11...Continuously variable speed pulley

Claims (1)

[Claims] By the control gear (8) meshing with the control pinion (7) which obtains the same rotation as the differential pinion (6) of the differential gear,
arbitrarily rotate the differential pinion (6) of the differential gear device,
A differential gear device that can arbitrarily change the rotation of the left and right shaft output.