JPS6165940A - Center differential gear - Google Patents

Abstract

PURPOSE:To enable torque to be effectively distributed forward and backward without damaging workability and incorporating property by connecting side gears normally meshing with first and second pinion gears to an output shaft. CONSTITUTION:A pinion shaft 11 is journalled by a differential case 1 for receiving input from the engine side, and first and second pinion gears 13, 15 are rotatably journalled on the pinion shaft 11, while side gears 19, 21 normally meshing with first and second pinion gears 13, 15 are connected to output shafts 9, 17. Thus, the normal meshing condition of bevel gears is provided so that torque can be effectively distributed forward and backward without damaging workability and incorporating property.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a center differential device suitable for a four-wheel drive vehicle.

[Prior Art] Conventionally, differential devices for four-wheel drive vehicles (center differential gear For example, there is a device described in Japanese Utility Model Application Publication No. 59-35119.

The device described in this publication has a structure in which a drive bevel pinion that simultaneously meshes with front and rear driven bevel gears having different numbers of teeth is supported by an inclined shaft on a drive carrier.

[Problems to be Solved by the Invention] In a differential device having such a structure, the meshing of the front and rear driven bevel gears with different numbers of teeth is special from the time when the drive bevel pinions are simultaneously engaged, resulting in high machining accuracy. In addition, due to the special meshing, the drive bevel pinion is supported in an inclined position on the drive carrier, so if the assembly is incorrect, it will be difficult to achieve smooth meshing and easy assembly. This was not desirable in terms of ease of assembly and workability.

Therefore, this invention does not require special processing.
It is an object of the present invention to provide a center differential device for a four-wheel drive vehicle that does not impair assemblability and workability.

[Means for Solving the Problems] In order to achieve the object described in +if, the present invention includes a differential case that receives input from the engine side, a pinion shaft that is pivotally supported by the differential case, and a pinion shaft that is rotatably supported by the differential case. It has a structure consisting of a set of a first pinion gear and a second pinion gear that are rotatably supported, and a set of side gears that are always engaged with the first and second pinion gears and connected to an output shaft that extends to the front side and the rear side. It is.

[Function] In this configuration, when each gear is in mesh with the bevel gear, the power input to the differential case is transferred to the pinion shaft and
Torque is distributed by a transmission path from each side gear to the output shaft via the onion gear.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawing of FIG.

In the figure, reference numeral 1 denotes a differential case, and power is transmitted from an input section 5 of the differential case 1 rotatably supported by a bearing 3 to a pinion 1tllll111. ! 3 and
is transmitted to a pair of first pinion gear 13 and second pinion gear 15 rotatably supported on pinion shaft 11,
Furthermore, one side is connected to the first output shaft 9 via a side gear 19 that meshes with the first pinion gear 13, and the other side is connected to the second output shaft 17 via a side gear 21 that meshes with the second pinion gear 15.
transmitted to.

The first and second pinion gears 13.15 are rotatably supported by the pinion shaft 11, and are formed into two upper and lower stages with a large diameter and a small diameter, and have different tooth ratios.

In the center differential device A configured in this way, the first pinion gear 11 and the second pinion gear 15 (4) that mesh with the side gears 19 and 21 are meshed with normal bevel gears, so that workability and assemblability are not impaired. Torque distribution can be easily realized.

[Effects of the Invention] As explained above, according to the present invention, a normal bevel gear meshing state can be obtained, so that effective torque distribution between the front and rear can be performed without impairing workability and assemblability. .

[Brief explanation of the drawing]

The accompanying drawing is a cutaway sectional view of the center differential equipment of the present invention. Explanation of main drawing symbols 1... Differential case 5... Input gear 9.17...
・Output shaft 13...First pinion gear 15...Second pinion gear

Claims (1)

[Claims] a differential case that receives input from the engine; a pinion shaft that is rotatably supported on the differential case; a set of first and second pinion gears that are rotatably supported on the pinion shaft and have different tooth ratios; A center differential device characterized by comprising a set of side gears connected to an output shaft that meshes with the first and second pinion gears and extends toward the front and rear sides.