JPS63212101A - Rear axle housing - Google Patents

Abstract

PURPOSE:To enable a baffle plate to be reliably mounted in a regular position by utilization of an existing bolt, by a method wherein the baffle plate, having an insertion hole for a drive axle is mounted on an inner peripheral surface in the vicinity of a boundary between final reduction gear and drive axle containing parts through a lock part. CONSTITUTION:A rear axle housing 1 has a final reduction gear containing part 2 and drive axle containing parts 3 and 4. In this case, a baffle plate 21 is disposed on an inner peripheral surface in the vicinity of a boundary between the containing part 2 and the containing parts 3 or 4. Lock parts 21b and 21c, the upper and the lower end of which are folded back to form a resilient and deformable double structure, are formed to a baffle plate body 21a. Engaging protrusions 22 and 23, locked to lock parts 21b and 21c, respectively, of the baffle plate body 21a, are formed on an inner peripheral surface in the vicinity of a boundary between the containing parts. Thereafter, the baffle plate 21 is inserted into the containing part 2, and is mounted to the housing 1 through locking of the baffle plate to the containing part. The central part of the baffle plate 21 is disposed with a gap l formed externally of the bolt therebetween.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a rear axle housing for a vehicle.

(Prior Art) As a conventional rear axle housing, there is one disclosed, for example, in Japanese Utility Model Publication No. 53-6164. That is, the banjo-type axle housing includes a final reduction gear housing part and a drive single shaft housing part, and at least a pair of retaining parts provided on the inner surface of the axle housing are elastically engaged with the retaining parts. and a baffle plate that is held within the axle housing and partitions the final reduction gear accommodating portion and the drive single shaft accommodating portion.

Therefore, when a lateral inertia force is applied to the vehicle, the tooth lubricating oil stored in the final reduction gear housing tends to flow out to the drive single shaft housing, or this flow is blocked by the baffle plate. Ru. As a result, insufficient lubrication of the final reduction gear can be avoided.

(Problems to be Solved by the Invention) However, in such a conventional rear axle housing, there is no need to attach the drive axle to the final reduction gear.
In other words, when the drive axle is inserted into the ground motion single shaft accommodating part of the axle housing and passed through the through hole of the baffle plate that is elastically locked to the rear axle housing in advance, the baffle plate is pushed in by the drive axle. Not only will the baffle plate be disengaged from its elastic lock 8#, but the pushed-in baffle plate will interfere with the gears of the final reduction gear, causing abnormal noises, malfunctions, etc. This is because the baffle plate is installed in a locked state on the inner surface of the axle housing, so it is easy to install the baffle plate in a locked state.
Due to the fact that it cannot be installed to a large extent for the purpose of preventing t1, the assembly is carried out without careful attention, which often causes problems.

(+ steps and actions for resolving interstitial points) This invention has the following features:
This was done in view of the advantages of the conventional P! g. A rear axle housing having a drive single shaft housing part protruding to both outsides of the final reduction gear housing part, and a baffle plate formed with a through hole for passing through the driving vehicle @8. Both ends are elastically engaged with engagement protrusions on the circumferential surface near the boundary between the final reduction gear housing part and the single drive shaft housing part, and the protruding tip of the bolt allows the drive axle to This is a rear axle housing in which a slight gap 8 is provided outward in the axial direction so that the intermediate portion of the baffle plate can be locked therein.

Therefore, the drive axle is inserted from the outside of the drive single shaft accommodating part of the rear axle housing, inserted through the through hole of the powerful plate, and spline-coupled to the side gear built in the final reduction gear accommodating part. Even if the center portion is pushed in by the drive axle, the buckle plate flexibly deforms to fill the gap and then locks onto the protruding tip of the bolt, preventing further pushing. Therefore, damage from the engagement protrusion of the baffle plate can be prevented, and the baffle plate can be reliably attached to the proper position.

(Example) Hereinafter, practical examples of the present invention will be described with reference to the drawings.

1-4 FIG. 1 shows one embodiment of the present invention. In the figure, reference numeral 1 designates a panjo-type rear axle housing, which houses a central final reduction gear accommodating portion 2 and drive single shaft accommodating portions 3 and 4 protruding outward from both sides of the accommodating portion 2 (7). A circular mounting opening 5 is formed in the final reduction gear housing portion 2, and a differential carrier 7 is mounted to the mounting opening 5 with a plurality of bolts 6. A differential case 1O is rotatably supported on the differential carrier 7 by a pair of side bearings 8 and 9. The differential carrier 7 also has a drive pinion 12 rotatably supported by a bearing 11.
and the pinion 12 is connected to the differential case lO
It meshes with a ring gear 14 fixed by a bolt 13 to the ring gear 14. Inside the differential case IO, a pinion shaft 15 is disposed perpendicularly to the pinion shaft 15, and a pair of pinion gears 16 are rotatably supported for three rotations, and a pair of side gears 17 and 18 are meshed with the pinion gear 16, respectively. are accommodated. Drive axles 19 and 20 are also connected to the side gears 17 and 1B by splines, respectively.

When the ring gear 14 is driven 5 times by the drive pinion 12, the differential case lO rotates together with the ring gear 14, and the side gear 1 is rotated through the pinion gear 16.
7 and 18 are each driven to rotate, and the driving wheels 19 and 20 coupled thereto are driven to function as a final control device.

A baffle plate 21 is fixedly attached to the inner circumferential surface of the rear axle housing 1Oi near the boundary between the reduction gear housing part 2 and the drive single shaft housing parts 3 and 4. Baffle plate 2
1 is formed at the composite side 1'', and as shown in FIG. When folded back, locking portions 21b and 21c having two structures 8 which are elastically deformable are formed, and on both sides of the intermediate portion of the core body 21a, a spacing force j and a wide force j are applied in the same manner as at the tip. The bent pieces 21d and 21e have a V-shaped bottom, and circular notches 21f and 21g are formed at the center of the tips of the bent pieces 21d and 21e. Powerful board body 21
The through hole 21h formed in the center of the drive axle 19, 20
The circumferential edge of the through hole 21h is made to protrude into a short cylindrical shape to improve rigidity. Further, the upper and lower ends of the rough plate main body 21a are bent pieces 21d.

The locking portions 21b and 21c are bent slightly toward the same side as the locking portion 21e, and are formed to elastically contact the inner circumferential surface of the rear axle housing l. Bent piece 21d.

21e increases the rigidity of the baffle plate main body 21m, and elastically contacts the inner circumferential surface of the axle housing l with the tip line, thereby preventing left and right rattling as shown in FIG. 3.
J Stop. Corner notch 21 of baffle plate main body 21m
i, 21j, 21k, and 21t are passages through which the lubricating oil that has leaked to the single drive shaft housing portions 3 and 4 of the rear axle housing 1 flows back to the final reduction gear housing portion 2.

The reason why the baffle plate 218 is formed in a vertically symmetrical shape is to prevent the baffle plate 21 from being attached vertically.

On the other hand, the final reduction gear housing section 2 of the rear axle housing l
A pair of engagement protrusions 22, 23i are formed on the inner circumferential surface near the boundary between the drive jILIIIl convergence portions 3 and 4 in correspondence with the locking portions 21b and 21c of the baffle plate 21, respectively. The engaging protrusions 22, 23 are welded and fixed in advance as separate members to the inner circumferential surface of the rear axle housing 1, and are provided with receiving portions 22a, 23m that gradually expand outwardly, between the inner circumferential surface of the rear axle housing l. is formed.

The baffle plate 21 is inserted into the final reduction gear housing s2 from the mounting opening 5 to which the differential carrier 7 of the rear axle housing l is mounted, and is inserted into the final reduction gear housing s2, and each locking portion 21b,
21c is fixed to the receiving portions 22m and 23m of the engagement protrusions 22 and 23 while being elastically compressed, and is attached to the rear axle housing 1. Next, differential case lO, side gears 17, 18, ring gear 1
4. The differential carrier 7 in which the final reduction gear such as the drive pinion 12 is incorporated 1. The bolt 68 is screwed into the rear axle housing 1 to attach the mounting opening 5.
It is installed so that it can be seen. 27 is a gasket.

In this state, the baffle plate main body 21g is located outside the bolt 6 in the thin line direction of the drive 919. A slight gap t is formed outside the protruding tip of the bolt 6 (see Figures 1 and 2).

Then, the drive axle 19 is inserted from the outside into the drive single shaft housing 3.4 of the axle housing 1 by 20%.
In this case, the drive axle 19.20 is inserted through the through hole 21h of the baffle plate 21. At that time, when the powerful plate 21 is pushed by the driving wheels @19, 20, the central part of the baffle plate main body 21a is bent inward and deformed, and the bent piece 21d
, 21e notches 21f.

After filling the gap t8 of the circumferential force 5 of 21 g, it is locked to the protruding tip of the bolt 6 to prevent further pushing. thus,
The baffle plate 21 is prevented from being disengaged from the engagement protrusions 22, 23 of the rear axle housing l due to the locks s2 lb, 21c. As a result, the baffle plate 21 is held in a fixed position at the normal position, and the side gears 17, 1
It is avoided that interference with the final reduction gear such as No. 8 causes abnormal noise, or that the cut of the No. 9 full plate 21 interferes with the smooth operation of the final reduction gear, and the original function of the baffle plate 21 in the housing is not performed. Secured. In this case, the lubricating oil 28 stored at the bottom of the final reduction gear housing part 2 receives centrifugal force as the vehicle turns around for a long period of time, and the lubricating oil 28 is transferred to the drive single shaft housing part 3°4.
This is provided for the purpose of preventing insufficient lubrication, such as seizure, from occurring on the final reduction gear. According to this baffle plate 21, the lubricating oil 28 is prevented from flowing out from the baffle plate main body 2.
1a and elastically contact the bent pieces 21d and 21e with the inner circumferential surface of the rear axle housing l.
Since this is also prevented by the lubricating oil 28, the lubricating oil 28 is effectively prevented from flowing out.

In order to obtain a good effect of the baffle plate 21, the gap t is smaller than the gap between the baffle plate 21 and the rotating part, specifically, the differential case 1G. setting so that it is securely locked to the baffle plate 21 or the bolt 6.

The bent piece 21d can be configured to lock onto the protruding tip of the bolt 6 or the baffle plate main body 21m.

21e can be omitted, and the engaging protrusions 22 and 23 are
It is only necessary that the locking portions 21b and 21a of the full plate 21 can be locked, and it is also possible to form them integrally with the rear axle housing l when pressing a steel plate or casting.

(Effects of the Invention) As can be understood from the above explanation, according to the present invention, the baffle plate force 5 can be reliably installed in the correct position using existing bolts, and the baffle plate can be attached to the original position with an inexpensive structure. Good functionality is ensured, and interference with the baffle plate or final reduction gear, resulting in abnormal noise or malfunction, is avoided.

[Brief explanation of the drawing]

The 1st to 4th factors show one embodiment of the present invention, FIG. 1 is a cross-sectional view of the rear axle housing, FIG. 2 is a cross-sectional view along M-IIf of FIG. 1 with the final reduction gear omitted, and FIG. 3 is a baffle The front view showing the plate, FIG. 4, is the same <gA side view.

Claims (1)

[Claims] 1. A rear axle housing having a final reduction gear housing part in which the differential carrier is attached to the peripheral edge of the mounting opening with a plurality of bolts, and a drive single shaft housing part protruding to both outsides of the final reduction gear housing part. A baffle plate having a through hole through which the drive axle is inserted is elastically attached at both ends to an engaging protrusion on a circumferential surface near the boundary between the final reduction gear housing section and the drive single shaft housing section. A slight gap is provided outward in the axial direction of the drive axle from the protruding tip of the bolt, and the intermediate portion of the baffle plate is positioned so as to be lockable. rear axle housing.