JPS6015967Y2 - differential limiter - Google Patents

Description

[Detailed explanation of the invention] This invention stops the differential under certain vehicle running conditions.
This invention relates to a differential limiting device designed to improve running performance.

Various types of this type of differential limiting device are already available, but among them is a dog clutch in a sleeve that uses hydraulic pressure to control the operating torque when limiting the differential, and that rotates with the axle shaft. There is a type that engages the teeth of the dog clutch on the differential case to stop the differential.

In differential limiting devices using this operating cylinder, the operating cylinder has conventionally been attached to a punch-type rear axle housing, and the axle housing also has an insertion opening for a fork that transmits the operating force to the sleeve.

With this configuration, the assembly rigidity of the operating cylinder is low and its positional accuracy is poor, resulting in a large operating resistance of the sleeve.

Additionally, since the sleeves and forks mentioned above are assembled into the axle housing, when assembling them, it is important to keep the sleeves and forks already assembled inside the axle housing centered until the axle shaft is inserted. is necessary, and the workability deteriorates.

In consideration of these circumstances, this invention aims to reduce the operating force by increasing the assembly rigidity of the operating cylinder, improves the workability of assembly, and also makes slight changes to the existing differential gear. The object of the present invention is to provide a differential limiting device that can provide a differential limiting function.

In order to achieve this objective, the present invention includes a fork insertion hole that applies a sliding operation force to the sleeve on the axle shaft from the outside of the differential carrier, and an operation cylinder that controls the sliding operation of the sleeve through the fork. The present invention is characterized in that both the mounting surface and the mounting surface are formed in a flange portion fixed to the axle housing of the carrier.

Embodiments of this invention will be described below with reference to the drawings.

In Fig. 1, which shows a flat cross-section of an automobile differential,
Reference numeral 1 indicates a differential carrier, and 8 indicates a rear axle housing.

A differential case 2 is incorporated inside the differential carrier 1, and a cylindrical portion 3 formed on both sides of the case 2 has left and right side bearings 4 (the left side bearing is not shown) relative to the carrier 1. It is rotatably supported by

A ring gear 5 fixed to the outer periphery of the case 2 meshes with a driving pinion 7 of a drive pinion shaft 6 so as to be capable of transmitting torque.

Inside the case 2, a pair of side gears 10 and a pair of pinions 11 positioned by a pinion shaft 12 are incorporated in a mutually engaged state.

The inner end portions of the left and right axle shafts 13 are integrally connected to the center hole of both side gears 10 by spline teeth 14 formed on their outer peripheral surfaces.

That is, the axle shaft 13 is coaxial with the cylindrical portion 3 of the differential case 2, and the spline teeth 14 extend to the outside of the case 2.

A sleeve 20 is fitted into the spline teeth 14 located outside the case 2 so as to be slidable in the axial direction of the axle shaft 13.

Dog clutch teeth 21 and 22 that can engage with each other are formed on the end surface of the sleeve 20 that faces the end surface of the cylindrical portion 3 of the case 2 and the end surface of the cylindrical portion 3.

In the differential carrier 1 described above, a part of the outer surface of the flange portion 1a formed at the joint between the differential carrier 1 and the rear axle housing 8 is connected to the sleeve 20'.
(7) Operation cylinder 26 for controlling sliding operation, for example, hydraulically
This is the mounting surface 24 of the.

Therefore, this operating cylinder 26 is attached to the flange 1a of the carrier 1, which has high rigidity.

Further, as is clear from FIG. 2, this flange 1a is formed with an insertion hole 23 through which the fork 25 of the sleeve 20 is passed, and the fork 25 extends into the operation cylinder 26 through this insertion hole 23, thereby allowing the fork 25 to pass through the operation cylinder 26. It is connected to 26 rods 28 by a connector 29.

On the other hand, a notch 8a is formed in the axle housing 8 at a location corresponding to the insertion hole 23 of the flange 1a to avoid interference with the fork 25, as is clear from FIG.

Further, the operating cylinder 26 integrally forms a portion that accommodates a connecting portion of the fork 25 with the rod 28, and has an assembly opening that connects the rod 28 of the fork 25 with the connecting portion above the portion that accommodates the connecting portion. 30 will be provided.

A plug 31 is screwed into this assembly opening 30.

In the above bark, a first
When hydraulic pressure acts through the hydraulic pipe 26a shown in the figure,
The piston 27 moves to the left in FIG. 1 together with the rod 28.

This allows the sleeve 20 to pass through the fork 25.
t along the spline teeth 14 of the axle shaft 13
H'JJ operation is performed, and the dog clutch teeth 21 engage with the dog clutch teeth 22 of the cylindrical portion 3 of the differential case 2, as shown in FIG.

As a result, the case 2 and the axle shaft 13 are integrally connected, and the case 2 and the axle shaft 13 are integrally connected.
The differential based on the relative rotation with the motor is stopped.

Since the operating cylinder 26 that controls the sliding operation of the sleeve 20 is mounted on the flange portion 1a of the carrier 1, the support rigidity of this cylinder 26 is high, and the operational resistance of the sleeve 20 is reduced. becomes.

In addition, when assembling these parts, the sleeve 20 and fork 25 are brought together to the side of the cylindrical portion 3 of the case 2, and the clutch teeth 21 and 22 of the case 2 and the sleeve 20 are engaged with each other. state.

In this state, the carrier 1 and the axle housing 8 are assembled in the same manner as a normal differential device, and then the left and right axle shafts 13 are assembled from both sides of the axle housing 8.

Thereafter, the fork 25 and the rod 28 of the operation cylinder 26 are connected using the coupling tool 29 using the assembly port 30, and the cylinder 26 is fixed to the carrier 1 by bolting or the like. Screw on the plug 31.

As described above, in this invention, the sleeve and fork are assembled together on the axle shaft on the side of the differential carrier, and the operating cylinder is also assembled on the flange of the differential carrier. The fork and operating cylinder will be positioned relative to the differential carrier.

This has the advantage that, regardless of vibrations applied to the rear axle housing, the sleeve and fork are always properly engaged, and the sleeve can be slid smoothly.

Moreover, when assembling the differential device, the present invention makes it possible to assemble the sleeve and fork all at once to the differential carrier, and then fix this carrier to the rear axle housing. Therefore, the insertion opening for the fork formed in the flange portion of the carrier can be set small, thereby making it possible to make the operating cylinder more compact and improving the workability of assembly.

In addition, in the present invention, as mentioned above, by assembling the operating cylinder to the flange of the differential carrier, which is the joint part with the rear axle housing, the support rigidity of this cylinder can be increased. Since the assembly opening for the fork and rod connection part is provided in the part that accommodates the connection part, the fork and the rod can be easily connected.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a plan cross-sectional view of the differential limiting device, FIG. 2 is a cross-sectional view along the line ■-■ in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line ■-■ in FIG. A line sectional view, FIG. 4 is a sectional view corresponding to FIG. 3, showing a state in which the differential is stopped. 1...Differential carry 1.1a...
... Flange part, 2 ... Differential case, 10 ... Side gear, 12 ...
・・Axle shaft, 14・・・Spline tooth, 20・・・Sleeve, 21.22・・・・
Dog clutch tooth, 23... Fork insertion hole, 24... Mounting surface, 25... Fork, 26... Operation cylinder.

Claims (1)

[Scope of utility model registration request] The differential carrier is fixed to the punch-type rear axle housing by the flange part. Inside the differential carrier, the differential case is rotatably supported by side bearings, and the axle shaft connected to the side gear in the differential case is Dog clutch teeth that can engage with each other are provided on the outer periphery of a sleeve that rotates together with the shaft and is slidable along its axial direction, and a portion of the differential case that opposes the sleeve. A differential limiting device configured to stop the differential by slidingly operating this sleeve to engage both clutch teeth with each other, the differential limiting device having a flange fixed to the rear axle housing of the carrier. A fork insertion opening that transmits a sliding operation force to the sleeve from the outside of the carrier and a mounting surface of an operation cylinder that controls the sliding operation with respect to the sleeve through the fork are formed together, and the operation cylinder is connected to the piston rond of the fork. A differential control device, characterized in that it is integrally provided with a portion for accommodating a connection portion with the fork, and an assembly eye for the connection portion is formed in the portion for accommodating the connection portion.