JPS6162642A - Differential restricting device - Google Patents

Abstract

PURPOSE:To prevent frictional plates from abnormal sounds due to the slip by providing cam surfaces on a pair of side gears of a differential gear. CONSTITUTION:By the rotation of a ring gear (not shown) connected to the drive side is rotated a differential case 1, and thereby a pinion shaft 3, pinion gear 5, side gears 7, cam 11 and sleeve 15 are also rotated integrally so that an axle 9 connected to the side gear 7 is rotated. When one axle 9 here slips, the side gears 7 begin to rotate relative to the differential case 1 and the cam 11 rotates integrally therewith. The rotation of the cam 11 causes plungers 21 bearing against a cam surface 11a to slidably move in the same direction synchronously relative to the sleeve 15. When the relative speed of the side gears 7 exceeds a certain speed, the side gears 7 are braked by the resistance of an orifice 17 to restrict the differential motion.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a differential limiting device disposed, for example, between the rear axles of an automobile.

(b) Technical background and problems A limited slip differential gear (hereinafter abbreviated as LSD) as shown in Fig. 5 has been known, and its configuration consists of a drive pinion (not shown).
A differential case 103 to which a ring gear 101 that meshes with is fixed, and a differential case 103 provided inside the case 103,
A side gear 111° 111 connected to the axle 113, 113 connected to the wheels, a pinion gear 109 meshing with the side gear 111, 111, a pinion shaft 107 provided with the gear 109, and a side gear 111 on both sides of the shaft 107. Pressure rings 102 and 10 are arranged and fitted to the differential case 103 so as to be able to slide in the axial direction.
2 and the side gear 111, which is arranged between the rings 102, 102 and the differential case 103. It is based on a multi-plate sliding latch mechanism 119,119 which is made up of a tarlage disk 115 and a differential case 103 that operate together and a clutch plate 117 that operates integrally.

Therefore, the operation of the conventionally structured LSD will be explained.

Regarding torque transmission during running, when the differential case 103 is rotated by the drive pinion via the song gear v101, the pressure rings 102, 102, which are fixed in the rotational direction, also rotate at the same end as the differential case 103). And the same ring 10
2.102 and the onion shaft 107 are compatible, so the pressure ring 102.102
The pressure ring 102.1 rotates as the pressure ring 102.1 rotates.
02 is pushed between the left and right sides by the action of the cam on the shaft 107, and presses and connects the clutch disk 115 and clutch plate 117 (there is one).
In other words, when traveling straight, the left and right middle i (because the Q resistance is equal, the left and right Zydogi - 17111).

The resistance applied to 111 is also equal, and the onion gear 109
The motion of the differential case 103 revolves around the axle at peripheral speed, and there is no relative speed between the side gears 111 and 111, and the torque input from the drive pinion is transferred from the ring gear 101 to the differential case 10.
3 → Pressure ring 102. '102 → pinion shaft 107 → vinyl Δngya 109 → Zydogya 111
Torque is evenly transmitted in the order of ゜111→axle.

Also, when there is a rotation difference between the left and right wheels, the torque is divided equally between the left and right wheels as when driving straight, but the torque transmitted to the high-speed wheel is equal to the road resistance of the same wheel. Since only torque is applied to the axle, the torque transmission state is obtained by subtracting the clutch capacity. In other words, the torque appearing on the high-speed wheel side is not affected by clutch resistance, but since this clutch resistance acts as a brake, it is transmitted to the side gear 111 on the low-speed wheel side via the differential case 103. , low-speed type The torque transmitted to the wheels is reduced to zero by the clutch and resistance.

However, in such a conventional differential limiting Rz, since differential illumination is performed by the frictional force of the multi-disc clutch 119, abnormal noise may be generated if the multi-disc clutch 119 slips. There is a problem in that the sound gives a sense of discomfort and anxiety to the driver.

(c) Purpose of the Invention The present invention was devised in view of the above-mentioned problems, and an object of the present invention is to provide a differential limiting device that generates less abnormal noise.

(d) Structure of the Invention In order to achieve the above object, the present invention provides a differential case which is interlocked with the drive side and rotationally driven, and which is rotatably supported via a pinion gear left, and this pinion gear. A transportation device (15) having a pair of meshing side gears is provided with a cam of λ·1 having a cam surface on the pair of side gears for interlocking rotation.
A pair of left and right bras communicating through an orifice is provided between the cams, and a sleeve is formed with a fitting hole, and the tip is inserted into the plunger fitting hole of the sleeve onto the cam surface. A pair of engaged plungers are provided on a slidable bottom base, and a fluid is stored inside.
Six surfaces are formed so that the pair of plungers reciprocate in the same direction synchronously during differential rotation of the side gear.

(E) Embodiment Hereinafter, an embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a cross-sectional view of the ax motion flill limiter according to the present invention.
By being fixed to the ring gear, the ring gear and the differential case 1 rotate as one.

On the other hand, the pinion shaft 3 has a pair of pinion gears 5.
is rotatably mounted. This vinyl Aangi A75
1 side gear I'77 as a pair of output gears meshing with
is rotatably disposed within the differential case 1. The side gear 7 is operatively connected to an axle 9 connected to the outside wheel by spline fitting.

An annular cam 11 is supported by the side gear 7 so as to be movable in the axial direction and engageable in the rotational direction, and the cam 11 rotates together with the side gear 177.

A cam surface 11a is formed on the front surface of the cam 11, as shown in FIG.

Then, the knob 11 is fixed to the side gear 7 with the phases of the opposing cam surfaces 11a being misaligned, so that the interval between the opposing cam surfaces 11a is adjusted to the differential of the side gear 7. They are always formed at regular intervals. Also, inside the differential case 1, there is a thrust ring 1 between the thrust 1 of the pinion gear 5 and the side gear 7 and the bearing.
3 is provided.

A sleeve 15 is disposed between the cams 11.

The sleeve 15 has an orifice 17 formed in the center thereof, and a pair of left and right plunger fitting holes 9 communicating through the orifice 17. Although this plunger ■ matching hole 19 is not shown, is it located in the circumferential direction? ! 2
A few are available.

However, it can also be made single in the circumferential direction. A plunger R21 is hermetically fitted into each of the plungers 17 and the matching holes 19 via an oil seal 23. This plunge r21 has an oil storage hole 25, as shown in FIG.

Then, the tip of the plunger 21 (the cam 1
1, and is configured to slide as the cam 11 rotates.

A fluid 27 such as silicone oil is stored in the plunger fitting hole 19.

Next, the effect will be explained.

In substantially the same manner as in the conventional example, the differential case 1 is rotated by the rotation of a ring gear (not shown) connected to the drive side. When the differential case 1 rotates, the pinion shaft 3, pinion gear I'75, side gear 7, cam 11, sleeve 15, etc. inside the differential case 1 also rotate integrally. The wheels connected to 琐＠ll 9, which are not shown in Figure 1, also rotate.

Here, if the wheel on one axle 9 side slips, such as by falling onto a muddy ground, the side gear 7 connected to the axle 9 on the side that has slipped begins to rotate relative to the differential case 1, and the pinion gear 5 also shifts from the pinion gear left 3. Rotate against. This rotation of the side gear 7 causes the cam 11 to
It spins with a roar. Due to the rotation of this cam 11, J:
A pair of plungers 21 in contact with the cam surface 11a of the cam 11 are synchronously moved in the same direction with respect to the sleeve 15.
Habit to move. When the relative speed difference between the side gears 7 reaches a certain level or more, as shown in FIG. 4, the resistance generated when the internal fluid 27 passes through the orifice 17 due to the inward movement of the plunger 21 increases. J to the plunger 21: Braking is applied to the night gear 7 via the recovery 11 to limit differential movement.

In this way, by differentially limiting the wheel (not shown) on the slipping side, driving force can be transmitted to the wheel (not shown) on the other side, making it easier to exit the IBJ from a rough road.

(f) Effects of the Invention As is clear from the above explanation, according to the configuration of the present invention, the differential is limited by using fluid resistance, and unlike the conventional method, the differential is limited by frictional force. Since the FJlla board does not slide, there is little chance of abnormal noises caused by the sliding of the FJlla board.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view of a differential limiting device according to the invention, FIG. 2 is an enlarged perspective view of the cam of FIG. 1, and FIG. 3 is an enlarged perspective view of the cam of FIG. 1 is an enlarged sectional view of the main part, FIG. 4 is a diagram showing the relationship between the resistance of the orifice and the difference U3 rotation speed, and FIG. 5 is a sectional view of a conventional differential limiting device. (Explanation of symbols representing main parts of the drawing) 1...Differential case 3...Nion shaft 5...Pinion gear 7
...Side gear 11...Cam 11a...
Cam surface 15...Sleeve 17...1 orifice...Plunge 1ν fitting hole 21...Plunger 27...Fluid (silicone oil)

Claims (1)

[Claims] A differential device including a pinion gear rotatably supported via a pinion shaft in a differential case which is movably connected to a drive side and is rotationally driven, and a pair of side gears meshing with the pinion gear. A pair of cams having cam surfaces are provided on the side gear so as to rotate in conjunction with each other, and a sleeve is provided between the cams, each having a pair of left and right plunger fitting holes that communicate through an orifice. A pair of plungers whose tips are in contact with the cam surface are slidably fitted to each other, and a fluid is stored inside the cam surface so that the pair of plungers are moved in the same direction when the side gears are differentially rotated. A differential limiting device characterized in that it is formed to reciprocate in synchronization with the .