JPH06200990A - Differential device - Google Patents

Abstract

PURPOSE:To restrain generation of vibration so as to reduce generation of differential sound by integrating a pair of differential side bearings together with a pair of differential side bearing caps through a stiffener. CONSTITUTION:A differential case 7 is rotatably supported with a differential carrier 6 through a right and left a pair of differential side bearings 9. Differential side bearing caps 13 are respectively fitted on the rear part side of both side bearings 9 by means of bolts 14. In this case, a circular stiffener 15 is bridged on both side bearing caps 3 and fixed to both side bearings 9 by means of the bolts 14. Hereby, both side bearings 9 are integrated together with both side bearing caps 13 through the stiffener 15, so as to restrain generation of vibration and reduce generation of differential sound.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a differential device used for a final reduction gear in a drive system of an automobile.

[0002]

2. Description of the Related Art As an example of a conventional differential device, there is a differential device shown in FIGS. In the figure, a transmission 3 is provided so as to be connected to an engine 2 of an automobile 1, and a differential device 4 is provided so as to be connected to the transmission 3. The driving force transmitted from the engine 2 is transmitted through the transmission 3 to the differential device. It is supposed to be transmitted to 4.

A drive bevel pinion 5, which is a component of the differential device 4, is rotatably supported by a differential carrier 6 and receives a force from the transmission 3. A drive bevel gear 8 attached to the differential case 7 is screwed onto the drive bevel pinion 5.

The differential case 7 is rotatably supported by the differential carrier 6 via a pair of differential side bearings 9 which are provided in the lateral direction of the vehicle body.

Inside the differential case 7,
There are provided a pair of differential pinions 11 that are opposed to each other by a shaft 10 that is located in the front-rear direction of the vehicle body, and a pair of differential gears 12 that are screwed into the pair of differential pinions 11. On the rear side of the pair of differential side bearings 9, the differential side bearing caps 13 are provided.
Are attached by bolts 14.

By the way, in the differential device 4, there is a possibility that a differential sound (meshing sound) may be generated due to the shift of the meshing portion of the differential side bearing 9, but the following measures are considered to prevent this differential sound. There is.

That is, in order to suppress the displacement of the differential side bearing 9, the material of the differential side bearing cap 13 is changed or the wall thickness is increased. Differential side bearing 9
Thicken the mounting bolt 14 of. Differential device 4
To increase the overall rigidity.

[0008]

However, if the material of the differential side bearing cap 13 is changed, the cost is increased and the machining is difficult to perform. When the wall thickness of the differential side bearing cap 13 is increased, the weight is increased and the workability during assembly is deteriorated.

If the bolt 14 is made thicker or the overall size is made larger, the clearance between the bolt 14 and other parts and the vehicle body is deteriorated. Therefore, a method for making the bolt 14 thicker or making the entire differential device 4 larger is provided. , Was not something that could be adopted. Since the differential side bearing 9 is cantilevered with respect to the differential carrier 6, the differential side bearing cap 13 was easily shaken. Therefore, there is a possibility that the meshing portion of the differential side bearing 9 may be displaced and the differential sound may be deteriorated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a differential device capable of improving the rigidity and suppressing the generation of differential sound without a large change in shape.

[0011]

In order to achieve the above-mentioned object, the present invention rotatably supports a differential case on a differential carrier via a pair of left and right differential side bearings, and a rear side of the pair of differential side bearings. In the differential device in which the differential side bearing caps are respectively attached by bolts, circular stiffeners are bridged to the pair of differential side bearing caps and fixed to the differential side bearings by the bolts.

[0012]

With this structure, the pair of differential side bearings and the differential side bearing caps are integrated by the circular stiffener, so that the vibrations of the differential side bearing caps and thus the differential side bearings are suppressed. To be done.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A differential device 4 according to an embodiment of the present invention will be described below with reference to FIGS. In addition,
The same members and parts as those shown in FIGS. 4 to 7 are designated by the same reference numerals.

In the figure, a drive bevel pinion 5, which is a component of the differential device 4, is rotatably supported by a differential carrier 6.
It receives power from the transmission 2 (see FIG. 4). In this drive bevel pinion 5,
A drive bevel gear 8 attached to the differential case 7 (see FIG. 6) is screwed.

The differential case 7 is provided with a pair of differential side bearings 9 located in the left-right direction of the vehicle body and a differential carrier 6 interposed therebetween.
It is rotatably supported by. Inside the differential case 7, there are a pair of differential pinions 11 (see FIG. 6) arranged opposite to each other by a shaft 10 (see FIG. 6) arranged in the front-rear direction of the vehicle body, and a pair of the differential pinions 11 are provided. A pair of differential gears 12 (see FIG. 6) that are screwed together are provided.

Differential side bearing caps 13 are located on the rear sides of the pair of differential side bearings 9, respectively. Further, a circular (annular) stiffener 15 is provided so as to bridge the pair of differential side bearing caps 13. This stiffener 15 has a press hole 15a.
And a bolt insertion hole 15b are formed.
Through a, the members located at the relevant part can be visually checked. The stiffener 15 and the differential side bearing cap 13 are fastened together by bolts 14 and fixed to the differential side bearing 9. In this case, since the stiffener 15 can be manufactured by press working, mass production becomes possible.

In the differential device 4 thus constructed, a pair of differential side bearings 9 and a pair of differential side bearing caps 13 are integrated by a circular stiffener 15 to increase rigidity. Therefore, the vibration of the differential side bearing cap 13, and thus the differential side bearing 9, is suppressed, and the meshing portion of the differential side bearing 9 is prevented from being displaced, so that the generation of differential sound can be prevented. Further, as the rigidity of the differential side bearing 9 is improved, it is possible to prevent the differential side bearing 9 from being abnormally worn.

As described above, since the support rigidity of the differential side bearing 9 is improved without changing the shape of the differential carrier 6, it is necessary to maintain a good mass production system for the differential carrier 6 and thus the differential device 4. You can Further, since it is not necessary to make a special modification to the assembly line, it is possible to suppress the cost increase due to the modification of the assembly line.
Moreover, since the rigidity of the differential side bearing 9 is improved as described above, the preload applied to the differential side bearing 9 becomes difficult to escape.

[0019]

According to the present invention, since a pair of differential side bearings and differential side bearing caps are integrated by a circular stiffener, vibrations of the differential side bearing caps and thus the differential side bearings are suppressed. , It is possible to prevent the occurrence of the differential sound by suppressing the shift of the meshing portion of the differential side bearing. Since the prevention of the differential sound is achieved without changing the differential carrier, it is possible to maintain a favorable mass production system of the differential device.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing a differential device according to an embodiment of the present invention.

FIG. 2 is a side view schematically showing the differential device.

FIG. 3 is a front view showing a stiffener of the differential device.

FIG. 4 is a bottom view schematically showing an example of an automobile using a differential device.

FIG. 5 is an exploded perspective view schematically showing an example of a conventional differential device.

FIG. 6 is a cross-sectional view showing a part of the differential device.

FIG. 7 is a sectional view corresponding to FIG.

[Explanation of symbols]

 4 Differential device 6 Differential carrier 7 Differential case 9 Differential side bearing 13 Differential side bearing cap 14 Bolt 15 Stiffener

Claims (1)

[Claims] 1. A differential device in which a differential carrier rotatably supports a differential carrier via a pair of left and right differential side bearings, and differential side bearing caps are respectively attached to the rear side of the pair of differential side bearings by bolts. A differential device, wherein a stiffener having a shape is bridged to the pair of differential side bearing caps and fixed to the differential side bearings by the bolts.