SU899381A1 - Wheel differential gear interlock mechanism for vehicle - Google Patents

Description

(54) MECHANISM OF BLOCKING OF THE INTER-WHEEL DIFFERENTIAL OF A VEHICLE

one

The invention relates to locking mechanisms for differentials, mainly transport vehicles.

A vehicle interlocking differential blocking mechanism is known, comprising a cam clutch mounted on a half-axle and made in the form of two coupling halves, one of which is spring-loaded relative to the semi-axle and is kinematically connected to the control, and the other is fixedly mounted on the differential housing, and a ring with end cams, installed in the bore, made on the fixed coupling half, and the height of the cams of the ring is equal to the height of the coupling 1.

A disadvantage of the known device is the impossibility of forcibly activating the differential lock when it is automatically turned off. The cam clutch blocking the differential can re-close when changing the direction of the relative rotation of the semi-axes, since the cam ends of the movable coupling half abut against the cam ends of the split ring, which prevents the coupling of the coupling half. The change in the relative rotation of the semi-axes occurs on the turn. There are cases in operation when it is necessary to forcibly block the differential after

5 Auto lock off. For example, when the drive wheels hit different road grip conditions, there is a difference in torque. When this difference in moments is a moment that the cam clutch can transmit, it will be switched off and the differential will be unlocked. It may be that the vehicle's grip strength will not be long enough. the movement is continued, since with differential cross-wheel drive, the force of the hydraulic gear depends on the drive force of the drive wheel, which is in the worst conditions of adhesion to the road. In this case, it is necessary to block the differential, which leads to the possibility of redistributing the torque applied to the differential case between the drive wheels in proportion to their adhesion forces with the ground.

The purpose of the invention is to increase the effectiveness of forced blocking.

The goal is achieved by the fact that the locking mechanism is provided with a stop installed in the movable coupling half and spring-loaded relative to the latter to interact with the cams of the said ring, and the control body is spring-loaded with respect to the movable coupling half and installed with the possibility of interaction with the said stop in the mode of forced differential lock,

.In FIG. 1 shows the differential locking mechanism, in section; in fig. 2 is a view A of FIG. 1, the position of the cam half couplings in the on state; in fig. 3 - the same, the position of the cam coupling halves in the off state; in fig. 4 - the same, the position of the stop when the lock is forcibly turned on.

The differential locking mechanism consists of half coupling 1, connected to the casing differential, half coupling 2, which is located on axis 3 and is spring-loaded in the axial direction by spring 4, stop 5 with spring 6, split ring 7, with end cams, forks 8 connected to control pedal, thrust bearing 9.

When the vehicle is moving, when the moment difference on the driving wheels does not exceed 1 moment, which can transfer the cam clutch, the cams of the coupling halves 1 and 2 as well as the split ring 7 are engaged. The stop 5 in this case is located in the cut part of the split ring 7 (Fig. 2). Differential locked. When the driving wheels hit the different conditions of adhesion to the road, a difference between them and their moments occurs. When this moment difference exceeds the cam clutch moment, the movable coupling half 2 moves in the axial direction, overcoming force springs 4. When the output of the cams of coupling half 2 from the depressions of coupling half 1, coupling half 2 twists and one stops. Seal 5 seizes the split ring 7 and rotates it together with coupling half 2 relative to the coupling half 1. In this case, the cams of the coupling half 2 do not fall into the hollows of the coupling half 1, since they rest on the cams of the split ring 7 (Fig. 3). Differential unlocked. To force the differential lock to be activated, pressing the pedal moves the fork 8, which through the upright bearing 9 acts on the stop 5 Moving, the stop 5 interacts with the Y-shaped notch of the split ring 7 and rotates it relative to the coupling half 2 (Fig. 4) . When the cams of the half-coupling 2 coincide with the depressions of the split ring 7 and the half-coupling 1, coupling half and coupling 1 and 2 undergo the action of the spring 4 and the fork 8. The differential is rigidly locked.

After overcoming a section with poor coupling conditions, the driver releases the control pedal and the fork 8 departs. The stop 5 under the action of the spring 6 returns to its original position, and the differential lock works in automatic mode.

The proposed mechanism will improve the permeability of the vehicle and improve its performance.

Claims (1)

Invention Formula The vehicle’s wheel differential lock mechanism, which contains a cam clutch mounted on a semi-axle and made in the form of two coupling halves, one of which is spring-loaded relative to the semi-axle and is kinematically connected to the control, and the other is fixed to the differential housing, mounted in a bore made on a fixed half coupling, wherein the height of the ring cams is equal to the height of the coupling cams, characterized in that, in order to increase the efficiency of the forcing Nogo blocking, it is provided with fixed stops in the movable coupling half and a spring-loaded relative to the last to react with the cams of said ring and handle assembly is spring-loaded relative to the movable coupling half mounted and engageable with said abutment in a forced differential lock mode. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 659423, cl. B 60 C 17/20, 1976.