JPH0573341U - Differential device - Google Patents

Abstract

(57) [Abstract] [Purpose] A hub is provided on one side of the differential limiting means, and the hub is connected to a differential member via a torque transmission shaft. An object of the present invention is to provide a differential device that can be easily assembled to the. [Configuration] A differential mechanism in which a meshing tooth for connecting to a torque transmission shaft is provided on a first differential member, and a hub provided with a meshing tooth for connecting to this torque transmission shaft, The differential limiting means for limiting the differential between the second differential member of the moving mechanism and the hub and the first differential member and the hub are positioned so that the meshing teeth of the first differential member and the hub have the same phase. And positioning means.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a differential device used in a vehicle.

[0002]

[Prior Art]

 In "Public Utility Showa 53-108036", "Differential limiting device for wheeled vehicle" is described. This is a differential device that differentially limits with a multi-disc clutch.This multi-disc clutch is arranged between a differential case, which is a differential member, and a hub, and this hub is splined to another differential member via an axle. Has been done.

[0003]

[Problems to be solved by the device]

 In the differential device having such a structure, the hub and the spline teeth of the differential member must be in phase in order to assemble the axle. However, the hub is located on one side of the multi-plate clutch, and its phase resistance is difficult due to its rotational resistance.

Therefore, an object of the present invention is to provide a differential device in which an axle for connecting a hub, which is one side of the differential limiting means, and a differential member can be easily assembled.

[0005]

[Means for Solving the Problems]

 A differential device according to a first aspect of the present invention is provided with a differential mechanism in which a meshing tooth for connecting to a torque transmission shaft is provided on a first differential member, and a meshing tooth for connecting to the torque transmission shaft. And a differential limiting means for limiting the differential between the second differential member of the differential mechanism and the hub, and the meshing teeth of the first differential member and the hub have the same phase. And a positioning means for positioning so that

In the differential device of the second aspect of the invention, instead of the positioning means of the first aspect of the invention, a gap is provided in each meshing tooth of the first differential member and the hub for phase matching with the meshing tooth of the torque transmission shaft. It is characterized by

[0007]

[Action]

 The differential limiting means operates between the first and second differential members via the hub and the torque transmission shaft to limit the differential of the differential mechanism.

In the process of assembling the differential device, since the meshing teeth of the first differential member and the hub are positioned in the same phase by the positioning means, the torque transmission shaft is assembled by the differential limiting means. It becomes extremely easy because it is released from the phase matching performed against the rotation resistance (first device).

Further, one or both of the meshing teeth of the first differential member and the hub are provided with a gap for phase matching with the meshing teeth of the torque transmission shaft, so that phase matching between the differential member and the hub is not performed. However, the interference of the meshing teeth is small and the assembly of the axle becomes easy.

[0010]

【Example】

 A first embodiment of the first invention will be described with reference to FIGS. 1, 2, and 10. FIG. 1 shows this embodiment, and FIG. 10 shows a power system of a vehicle using this embodiment. The left and right directions are the left and right directions in this vehicle and in FIGS. 1 and 2.

The power system includes an engine 1, a transmission 3, a propeller shaft 5, a rear differential 7 (a differential device of FIG. 1 arranged on the rear wheel side), rear axles 9, 11, left and right rear wheels 13, 15, It is composed of left and right front wheels 17, 19, etc. The driving force of the engine 1 is distributed from the transmission 3 and the propeller shaft 5 to the left and right rear wheels 13, 15 via the rear differential 7.

As shown in FIG. 1, the differential case 21 (second differential member) of the rear differential 7 is supported in the differential carrier 25 via the bear rings 23, 23. A ring gear 27 is fixed to the differential case 21 with bolts 29, and the ring gear 27 meshes with a drive pinion gear 31. The drive pinion gear 31 is formed integrally with the drive pinion shaft 33, and the drive pinion shaft 33 is connected to the propeller shaft 5 side. Thus, the differential case 21 is rotationally driven by the driving force from the engine 1.

A pinion shaft 35 is fixed to the differential case 21, a pinion gear 37 is rotatably supported by the pinion shaft 35, and left and right side gears 39 and 41 are meshed with the pinion gear 37. In this way, the differential mechanism 43 is configured. The left side gear 39 (first differential mechanism) is spline-coupled to the left rear axle 9 side torque transmission shaft 45, and the right side gear 41 is splined to the right rear axle 11 side torque transmission shaft 47. It is connected. The rotation of the differential case 21 is distributed from the pinion shaft 35 and the pinion gear 37 to the left and right rear wheels 13 and 15 through the side gears 39 and 41. Side differentially distributed.

A hub 49 is arranged on the left side of the side gear 39, and the hub 49 is spline-connected to the torque transmission shaft 45. A multi-plate clutch 51 is arranged between the hub 49 and the differential case 21. A pressure receiving member 55 is arranged between the pressure receiving portion 53 of the differential case 21 and the multi-plate clutch 51. Further, a piston 59 is engaged with a ring-shaped hydraulic chamber provided on the left side wall 57 of the differential case 21 via an O-ring to form a hydraulic actuator 61. A disc spring 63 is arranged in the hydraulic chamber, and the multi-plate clutch 51 is pressed between the piston 59 and the pressure receiving member 55 to always be in a loosely engaged state.

A cylindrical member 65 is fixed to the differential carrier 25 with bolts 67. A circumferential groove 67 is formed on the inner circumference of the cylindrical member 65 between the O-rings, and an oil passage 69 is formed in the differential case 21 and the cylindrical member 65 via the circumferential groove 67. Hydraulic pressure is supplied to the hydraulic chamber of the hydraulic actuator 61 from an oil pump (none of which is shown) via the oil passage 69, the hydraulic pipe 71, and the control valve device, and the multi-plate clutch 51 is engaged. ..

Thus, the differential limiting means 73 is configured.

When the multi-plate clutch 51 is engaged, its engaging force restricts the relative rotation between the left side gear 39 and the differential case 21 via the hub 49 and the torque transmission shaft 45, depending on the strength of the engaging force. Differential limitation of the differential mechanism 43 is performed. If the hydraulic pressure is large enough, the differential of the differential mechanism 43 is locked to improve the running performance of the vehicle on a bad road. When the hydraulic pressure is removed or weakened, the differential mechanism 43 applies the biasing force of the disc spring 63. The vehicle will be able to make a smooth and stable turn, returning to the gradual differential limiting state. In this way, the rear differential 7 is configured.

When assembling the rear differential 7, the side gear 39 and the hub 49 have an adhesive (positioning means) at a position indicated by an arrow 79 in a state where the respective spline teeth 75 and 77 (meshing teeth) shown in FIG. Has been applied. Therefore, the work of assembling the torque transmission shaft 45 to the rear differential 7 is relieved from the work of aligning the phases of the spline teeth 75 and 77 while receiving the rotational resistance of the multi-plate clutch 51, and is extremely easy.

Next, a second embodiment of the first invention will be described with reference to FIGS. 3 and 4. This embodiment is an example in which another positioning means is used in the above-mentioned first embodiment, and hereinafter, members having the same functions as those in the first embodiment are designated by the same reference numerals, and the differences are cited. explain.

The hub 81 and the side gear 83 are rotationally positioned by engaging a pin 87 (positioning means) with an engagement hole 85 provided between them. The engagement hole 85 is provided at a position where the spline teeth 89 and 91 (meshing teeth) of the hub 81 and the side gear 83 have the same phase. In this way, since the phases are preliminarily adjusted, the work of assembling the torque transmission shaft 45 to the hub 81 and the side gear 83 is extremely easy.

Next, a first embodiment of the second invention will be described with reference to FIGS. FIG. 5 shows this embodiment used for the rear differential 93 of FIG. Hereinafter, the left and right directions are the left and right directions in the vehicle of FIG. 10 and in FIG. 5, and members and the like without reference numerals are not shown.

The differential case 95 (second differential member) is supported in the differential carrier 25 via bearings, and is rotationally driven by the driving force from the engine 1 via the ring gear 27. A pinion shaft 97 is fixed to the differential case 95, a pinion gear 99 is rotatably supported by the pinion shaft 97, and left and right side gears 101 and 103 are meshed with the pinion gear 99 to form a differential mechanism 105. There is. The left side gear 101 (first differential member) is spline-connected to the torque transmission shaft 45 together with the hub 107 arranged on the left side thereof, and the right side gear 103 is spline-connected to the torque transmission shaft 47.

A working chamber 109 filled with high-viscosity silicone oil is formed between the hub 107 and the differential case 95, and the outer plate 111 engaged with the differential case 95 and the hub 107 are formed inside the working chamber 109. And inner plates 113 engaged with are alternately arranged. Between the differential case 95 and the hub 107, X-rings 115 and 117 (seal having an X-shaped cross section) that prevent leakage of silicone oil are arranged. In this way, the viscous coupling 119 (differential limiting means) is configured.

The shear resistance of the plates 111 and 113 against the silicone oil limits the relative rotation between the side gear 101 and the differential case 95 via the hub 107 and the torque transmission shaft 45, and limits the differential of the differential mechanism 105. ..

As shown in FIG. 6 and FIG. 7, the number of spline teeth 121 (meshing teeth) of the hub 107 is half the number of spline teeth 123 (meshing teeth) of the side gear 101. As shown in FIG. 6, a gap 127 is formed between the spline teeth 125 (meshing teeth) of the torque transmission shaft 45 and the spline teeth 121. The gap 127 serves as a phase matching gap, and the torque transmission shaft 45 meshes with the spline teeth 121 and then rotates within the range of the gap 127, so that the viscous coupling 119 of the viscous coupling 119 accompanying the rotation of the hub 107 is rotated. The phase matching with the spline teeth 123 becomes possible without receiving resistance or by only slightly rotating the hub 107, and the assembling becomes easier.

The gap may be provided on the side gear 101 side or on both the side gear 101 and the hub 107.

Next, a second embodiment of the second invention will be described with reference to FIGS. 8 and 9. This embodiment is a modification of the first embodiment, and members having the same function are denoted by the same reference numerals and quoted to explain the differences.

The spline teeth 131 (meshing teeth) of the hub 129 are made thinner than the spline teeth 135 (meshing teeth) of the side gear 133 by a portion drawn by a broken line, and the spline teeth 125 of the torque transmission shaft 45 are A gap 137 is provided between them. Therefore, by rotating the torque transmission shaft 45 within the range of the clearance 137 after engaging with the spline teeth 131, the torque transmission shaft 45 does not receive the resistance of the viscous coupling 119 accompanying the rotation of the hub 129, or the hub. By slightly rotating 129, the phase can be aligned with the spline teeth 135, and the assembling becomes easier.

The tooth thickness of the spline teeth 135 may be thin, or both spline teeth 131 and 135 may be thin.

In the present invention, the differential mechanism is not limited to the bevel gear type as in each embodiment, but may be, for example, a planetary gear type. Further, the differential limiting means may be provided on both axle sides, for example.

[0031]

[Effect of the device]

 The differential device of the present invention is a differential device in which a hub, which is one side of differential limiting means, and a differential member are connected via a torque transmission shaft. Position the meshing teeth in phase with each other (first device), and provide a gap in each meshing tooth to match the phase with the meshing teeth of the torque transmission shaft (second device). It became possible to assemble the torque transmission shaft to the differential device without receiving the rotational resistance of the means, or by merely receiving a slight rotational resistance, and the assemblability was greatly improved.

[Brief description of drawings]

FIG. 1 is an overall sectional view of a first embodiment of a first invention.

FIG. 2 is a longitudinal sectional view of a main part of the embodiment shown in FIG.

FIG. 3 is a lateral cross-sectional view of the essential parts of the first embodiment and the second embodiment.

FIG. 4 is a sectional view taken along line XX of FIG.

FIG. 5 is an overall sectional view of a first embodiment of a second invention.

FIG. 6 is a vertical cross-sectional view of the essential parts of the first embodiment of the second invention.

FIG. 7 is a longitudinal sectional view of an essential part of the first embodiment of the second invention.

FIG. 8 is a vertical cross-sectional view of essential parts of a second embodiment of a second invention.

FIG. 9 is a longitudinal sectional view of an essential part of a second embodiment of the second invention.

FIG. 10 is a skeleton mechanism diagram showing a power system of a vehicle using each embodiment.

[Explanation of symbols]

7, 93 Rear differential (differential device) 21, 95 Differential case (second differential member) 39, 101 Side gear (first differential member) 43, 105 Differential mechanism 45 Torque transmission shaft 49, 81, 107, 129 Hub 73 Differential Limiting Means 75, 77, 89, 91, 121, 123, 125, 1
31,135 Spline teeth (meshing teeth) 87 Pins (positioning means) 119 Piscus coupling (differential limiting means) 127,137 Gap

Claims (2)

[Scope of utility model registration request] 1. A differential mechanism in which a meshing tooth for connecting to a torque transmission shaft is provided on a first differential member, and a hub in which a meshing tooth for connecting to this torque transmission shaft is provided. ,
The differential limiting means for limiting the differential between the second differential member of the differential mechanism and the hub and the first differential member and the hub are positioned so that the respective meshing teeth have the same phase. And a positioning unit for controlling the differential. 2. In place of the positioning means, each meshing tooth of the first differential member and the hub is provided with a gap for phase matching with the meshing tooth of the torque transmission shaft.
The differential device described.