JPH0673502U - Driving force transmission device - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention provides a driving force transmission device in which the input side shaft and the output side shaft have the same rotation direction, and both shafts can cross each other to transmit gears and does not take up space. provide. According to this driving force transmission device, a pinion 3 is provided on an input side shaft 12, an internal gear 1 is provided on an output side shaft 11, and a gear transmission mechanism is formed by intersecting the input side shaft 12 and the output side shaft 11. To do. In this gear transmission mechanism, the pinion 3 is inscribed in the internal gear 1, the inner ring 6I of the bearing 5 is formed on the conical outer peripheral surface of the internal gear 1, and the inner ring 5I of the bearing 5 is formed on the outer surface of the pinion 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a driving force transmission device having a gear transmission mechanism between an input shaft and an output shaft applicable to a vehicle or the like.

[0002]

[Prior art]

 Conventionally, as a driving force transmission gear mechanism, when the axes of the input shaft 33 and the output shaft 31 extend parallel to each other, as shown in FIG. In some cases, the spur gears 32 and 34 respectively provided are configured to mesh with each other. Alternatively, as the driving force transmission gear mechanism, when the input shaft 33 and the output shaft 31 have their axes extending in parallel to each other, as shown in FIG. An internal gear 35 is provided at 31 and an internal gear pair is used. The internal gear 35 is inscribed in the internal gear 35 so that the small gear 36 meshes with the internal gear 35 (see Japanese Patent Laid-Open No. 59-37363).

Further, in the gear reducer disclosed in Japanese Utility Model Laid-Open No. 64-4943, a plurality of external gears that are integrally arranged on the eccentric rotating part of the main shaft are rotated relative to the eccentric rotating part. The external gears are fitted as much as possible, and the internal gears in which the external gears mesh with each other are provided so that their axial centers coincide with the axial center of the main shaft, and the gear ratio of the external gear to the internal gear is input. The inner side gear is set to be larger, the input side one is fixed, and the output side driven shaft is connected and fixed.

Further, in the driving force transmission device, when the axes of the input shaft 33 and the output shaft 31 intersect with each other, the intersecting angle of the two axes is the intersection angle β (the difference in angle between the axes having two directions). In the case of an oblique bevel gear forming a smaller angle), as shown in FIG. 6, a bevel gear 38 is attached to the input shaft 33, a bevel gear 37 is attached to the output shaft 31, and the bevel gears 37 and 38 are attached. The driving force is transmitted by meshing with each other. Alternatively, the same applies when the axes of the input shaft 33 and the output shaft 31 intersect at a right angle.

Conventionally, a drive force transmission device from a diff to a tire on a front axle or a rear axle of a vehicle has a ridged axle shaft (shown by a chain line in FIG. 9) housed in an axle case 40 fixed to a diff case 24. (Not shown). The axle case 40 extends horizontally from the housing 24 that houses the differential in the axial direction of the tire 39.

[0006]

[Problems to be solved by the device]

 However, the bevel gears 37 and 38 shown in FIG. 6 are such that the input shaft 33 and the output shaft 31 intersect, but the rotation directions of the input shaft 33 and the output shaft 31 are opposite rotations, and space is required. I will end up. As shown in FIG. 7, since the input shaft 33 and the output shaft 31 are meshed with the spur gears 32 and 34, a space is taken up as compared with the internal gear pair shown in FIG. Further, in the driving force transmission device for the internal gear pair shown in FIG. 8, the output shaft 31 and the input shaft 33 have both axes parallel to each other and do not have an intersection point. Has an eccentricity δ with respect to the axis of the input shaft 33, so that a circular motion is performed unless structural work is performed. Further, in the gear reducer disclosed in Japanese Utility Model Laid-Open No. 64-4943, the axes of the input shaft and the output shaft extend in parallel, and the axes do not intersect.

Further, in the driving force transmission device having a structure in which the axle case 40 fixed to the housing 24 extends horizontally with respect to the axial center of the tire 39, as shown by the chain line in FIG. Is rotatably arranged, and the axis of the axle shaft and the tire 39 extend horizontally. Therefore, due to the smaller diameter of the tire 39 or the size increase of the diff accompanying engine power up, the vehicle body, especially the diff There is a problem in that the distance h between the lower surface of the housing 24 that houses it and the ground surface 41 becomes short, and the ground clearance of the vehicle becomes low.

Therefore, an object of the present invention is to incorporate a gear transmission mechanism in which the input-side shaft and the output-side shaft rotate in the same direction and the axes of the input-side shaft and the output-side shaft intersect with each other, Driving force transmission that secures transmission strength, can be constructed with a simple structure and is compact, and can be applied to the driving force transmission system between the vehicle differential and the hub with the tire attached to increase the ground clearance. To provide a device.

[0009]

[Means for Solving the Problems]

 The present invention is configured as follows in order to achieve the above object. That is, according to the present invention, the input side shaft rotatably supported by the first support through the bearing, and the driving force of the input side shaft are transmitted, and the input side shaft is rotatably supported through the bearing by the second support. In the driving force transmission device having the output side shaft, the pinion provided at the end of one of the shafts intersects the shaft center of the input side shaft and the shaft center of the output side shaft, and the shaft side of the other side of the shaft. The present invention relates to a driving force transmission device characterized by having a gear transmission mechanism that meshes with an internal gear having teeth inside a cone provided at the end of the.

In this driving force transmission device, an inner ring of the bearing is formed on an outer portion of the input side shaft near the pinion, and an inner ring of the bearing is formed on an outer side portion of the internal gear of the output side shaft. Are formed.

Further, in this driving force transmission device, the driving force transmission system between the diff in the vehicle and the hub to which the tire is mounted is applied to the diff shaft for outputting the driving force in the diff and the driving shaft to which the hub is attached. And an intermediate shaft having the internal gear and the pinion at both ends in an intersecting state with the internal gear and the gear transmission mechanism incorporated in the drive force transmission from the differential shaft to the intermediate shaft. To the drive shaft, the separate gear transmission mechanism is incorporated.

[0012]

[Action]

 The driving force transmission device according to the present invention is configured as described above and operates as follows. That is, this driving force transmission device includes a pinion provided at the end of the input side shaft, an internal gear having teeth inside a cone provided at the end of the output side shaft, an axial center of the input side shaft and the output side. Since the axis center intersects with the shaft and the pinion has a gear transmission mechanism that meshes with the internal gear, the internal gear having teeth formed on the conical inner surface and the pinion having teeth formed on the external surface are provided. In the meshed state, a large number of teeth are intermeshed with each other, so that the driving force transmission strength can be ensured and the space can be made compact.

Further, in this driving force transmission device, an inner ring of the bearing is formed in an outer portion of the input side shaft in the vicinity of the pinion, and the bearing is provided in an outer portion of the internal gear of the output side shaft. Since the inner ring is formed, the bearings can support the reaction force generated when the pinion and the internal gear mesh with each other, and the supporting structure can be made compact.

In applying the driving force transmission device according to the present invention to a driving force transmission device that connects a front differential or a rear differential to a tire, an intermediate shaft provided with the internal gear and the pinion at both ends is used as the differential shaft. And the drive shaft are provided in an intersecting state, that is, by providing the gear transmission mechanism in two places in the drive force transmission system between the differential and the hub, the intermediate shaft is inclined. However, the diff shaft and the drive shaft of the hub can be configured in a horizontal state, and the direction from the diff shaft where the axis extends in the horizontal direction is once inclined at the intermediate shaft, and then again. The direction of the drive shaft can be returned to the same horizontal direction as the differential shaft. Therefore, by using the drive force transmission device from the differential to the tire in the front axle or the rear axle of the vehicle, the distance between the housing housing the differential and the ground, that is, the ground clearance can be increased.

[0015]

【Example】

 An embodiment of a driving force transmission device according to the present invention will be described below with reference to the drawings. 1 is a sectional view showing an embodiment of a driving force transmission device according to the present invention, FIG. 2 is a front view of the driving force transmission device of FIG. 1 as seen from a pinion side, and FIG. 4 is a driving force transmission device according to the present invention. FIG. 5 is an explanatory diagram showing the basic principle of the provided gear transmission mechanism, and FIG. 5 is an explanatory diagram showing the meshing state of the gears of the gear transmission mechanism of FIG.

The basic principle of the driving force transmission device according to the present invention is shown in FIGS. 4 and 5. That is, the internal gear 1 has teeth 2 formed inside the cone, and the inside diameter of the teeth 2 is formed so that the outside is gradually larger than the inside. The pinion 3 is a bevel gear having teeth 4 formed on the outside of the cone. The pinion 3 meshes with the internal gear 1, the input side shaft 12 and the output side shaft 11 rotate in the same direction, and the input side shaft 12 and the output side shaft 11 intersect at an intersection angle α. The speed ratio of both gears is determined by the gear ratio. Further, the input side shaft 12 and the output side shaft 11 constitute a speed reducer, but conversely, an internal gear is attached to the input side shaft 12 and a pinion is attached to the output side shaft 11 to form a speed increaser. You can also do it.

FIG. 1 shows an embodiment of a driving force transmission device according to the present invention. This driving force transmission device includes an input side shaft 12 rotatably supported by a first support 42 via a bearing 5, and a driving force of the input side shaft 12 transmitted to the second support 43. And an output side shaft 11 rotatably supported via the input side shaft 12 and the output side shaft 11. Reference numeral 11 is a gear transmission mechanism configured to transmit the driving force. In this gear transmission mechanism, a pinion 3 made of a bevel gear having teeth 4 on a conical outer surface is provided at an end of an input side shaft 12, and a tooth 2 is provided inside a cone at an end of an output side shaft 11. The internal gear 1 having the above is provided, and the pinion 3 and the internal gear 1 are meshed with each other.

Further, in this driving force transmission device, the inner ring 6I of one bearing 5 is formed on the outer side portion of the input side shaft 12 near the pinion, and the inner ring 6I of the output side shaft 11 is formed on the outer side portion. The inner ring 5I of the bearing 5 is formed. That is, one bearing 5 has an inner ring 5I formed by cutting the outer surface of the input side shaft 12 to form a raceway surface 10, an outer ring 9 fixed to the first support body 42, and a cylinder interposed between the inner ring 5I and the outer ring 9. It is composed of rollers 7. The other bearing 5 includes an inner ring 6I formed by cutting the outer surface of the output side shaft 11 to form a raceway surface 6, an outer ring 9 fixed to the second support 43, and a cylindrical roller 7 interposed between the inner ring 6I and the outer ring 9. It is composed of. That is, a raceway surface 6 into which a cylindrical roller 7 is fitted is formed on the conical outer peripheral surface of the internal gear 1, a plurality of cylindrical rollers 7 are interposed between the outer ring 9 and the cylindrical roller 7, and the cylindrical rollers 7 are equally spaced by a cage 8. Is held. The input side shaft 12 is integrally formed with a conical portion 3a having a shape opposite to that of the pinion 3, and the outer peripheral surface of the conical portion 3a is formed with a raceway surface 10 into which the cylindrical roller 7 is fitted. The rolling element of the bearing 5 is not limited to the cylindrical roller 7, but may be a ball, a tapered roller, or the like. The reaction force generated when the internal gear 1 and the pinion 3 mesh with each other is arranged to be supported by the bearing 5.

Next, another embodiment of the driving force transmission device according to the present invention will be described with reference to FIG. FIG. 3 is a sectional view showing another embodiment of the driving force transmission device according to the present invention, showing a state in which a gear transmission mechanism is incorporated between a diff and a hub in a vehicle. The driving force transmission device of this embodiment is applied to a front axle or a rear axle of a vehicle, and compared with the above-mentioned embodiments, a drive having substantially the same configuration except that an intermediate shaft is provided. Since the force transmission device, that is, the gear transmission mechanism is used at two places, the same reference numerals are given to parts having the same function.

The driving force transmission device of this embodiment is incorporated in a driving force transmission system between the diff 44 and the hub 22 to which the tire 39 is mounted in the vehicle, and is installed in the housing 24 housing the diff 44. The input shaft, that is, the differential shaft 14, which is rotatably supported through the bearing 5 and the driving force is transmitted through the differential 44, the driving force of the differential shaft 14 is transmitted, and the housing 24 and the axle case 18 are transmitted through the bearing 5 through the bearing 5. It has an intermediate shaft 13 rotatably supported and an output shaft or drive shaft 15 to which a driving force of the intermediate shaft 13 is transmitted and which is rotatably supported by an axle case 18 via a bearing 5. . The intermediate shaft 13 is provided with the internal gear 1 at the diff side end and the pinion 3 at the hub side end. The diff shaft 14 is provided with a side gear 17 in the diff case 16 of the diff 44 at one end and a pinion 3 located in the housing 24 at the other end. The pinion 3 provided on the diff shaft 14 is an intermediate shaft 13 Meshes with the internal gear 1. Further, the drive shaft 15 is provided with the internal gear 1 and meshes with the pinion 3 of the intermediate shaft 13. The intermediate shaft 13 is arranged so as to be inclined in an intersecting state between the differential shaft 14 that outputs the driving force at the differential 44 and the drive shaft 15 to which the hub 22 is attached. Therefore, this drive force transmission device incorporates a gear transmission mechanism in the drive force transmission from the differential shaft 14 to the intermediate shaft 13, and a different gear transmission mechanism in the drive force transmission from the intermediate shaft 13 to the drive shaft 15. Is incorporated. In this driving force transmission device, the bearing 5 is the same as that of the above-mentioned embodiment, and therefore the description thereof is omitted here.

In this driving force transmission device, an axle support 23 is fixed to a final gear case, that is, a housing 24 with a mounting bolt 25 with an oil seal 27 or the like interposed therebetween, and the axle support 23 has an axle case 18 and an oil seal 27. It is fixed with a mounting bolt 25 with the interposition of the like. The differential shaft 14 is provided with the pinion 3 at one end and the differential case, that is, the side gear 17 in the differential case 16 at the other end. The intermediate shaft 13 passes through the inside of the axle support 23, one end of which is rotatably supported by the differential case 16 through the bearing 5, and the other end of which is rotatably supported by the axle case 18 through the bearing 5. There is. The drive shaft 15 is rotatably supported in the axle case 18 via a bearing 28. The drive shaft 15 is provided with the internal gear 1 at one end and a joint flange 19 at the other end. A hub 22 is fixed to the joint flange 19, and a disk wheel 20 to which a tire 39 is attached is attached to the hub 22 with wheel bolts and nuts 21. In the figure, reference numeral 29 is a brake drum, and reference numeral 30 is a brake shoe.

By configuring the driving force transmission device as described above, the intermediate shaft 13 is set downward from the side of the differential 44 toward the tire 39, and the intermediate shaft 13 is set between the differential shaft 14 and the intermediate shaft 13. By incorporating a gear transmission mechanism and a gear transmission mechanism between the intermediate shaft 13 and the drive shaft 15, the driving force from the differential gear 44 is smoothly transmitted to the drive shaft 15 side. Therefore, if this driving force transmission device is installed between the differential 44 and the hub 22, the tread surface of the tire 39 can be located further below the housing 24 that houses the differential 44, and the ground surface 41 The distance H to the housing 24 can be increased, and the ground clearance of the vehicle can be increased.

[0023]

The driving force transmission device according to the present invention is configured as described above and has the following effects. In other words, in this driving force transmission device, since the pinion provided on the input side shaft is meshed with the internal gear having teeth inside the cone provided on the output side shaft, the input side shaft and the output side shaft are the same. It can be decelerated in the direction of rotation. Further, since the pinion provided on the output side shaft is meshed with the internal gear having teeth inside the cone provided on the input side shaft, the input side shaft and the output side shaft are accelerated in the same rotation direction. be able to. Since the speed ratio is determined by the gear ratio, the design of the gear mechanism is simple and the degree of freedom in design is great. Moreover, since the pinion is inscribed in the internal gear, the meshing area of the number of teeth of both gears is large, and it is possible to improve the strength in transmitting the driving force, and the pinion is inscribed in the internal gear. Doesn't take up space.

Further, since the outer surfaces of the pinion and the internal gear form the inner ring of the bearing, the structure can be made compact. Moreover, the reaction force generated when the internal gear and the pinion mesh with each other is supported by the bearing and can receive the axial load.

Further, this driving force transmission device is applied to a driving force transmission system between a diff of a vehicle and a hub to which a tire is attached, and a diff shaft that outputs the driving force of the diff and a drive shaft to which the hub is attached. An intermediate shaft having the internal gear and the pinion at both ends in an intersecting state with the internal gear and the gear transmission mechanism incorporated in the drive force transmission from the differential shaft to the intermediate shaft, and Since the separate gear transmission mechanism is incorporated in the drive force transmission from the shaft to the drive shaft, the shaft center direction of the output side shaft can be changed to two stages relative to the input side shaft, and the direction from the input side shaft can be changed. After changing once, the direction of the output side shaft can be returned to the direction parallel to the input shaft. Therefore, when applied to the drive force transmission system from the diff to the hub, that is, the tire in the front axle or rear axle of the vehicle, the distance between the ground and the housing that houses the diff can be increased, and the ground clearance of the vehicle can be increased. it can.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a driving force transmission device according to the present invention.

FIG. 2 is a front view of the driving force transmission device of FIG. 1 viewed from the pinion side.

FIG. 3 is a sectional view showing another embodiment of the driving force transmission device according to the present invention and showing a state in which a gear transmission mechanism is incorporated between a diff and a hub in a vehicle.

FIG. 4 is an explanatory view showing a basic principle of a gear transmission mechanism provided in a driving force transmission device according to the present invention.

5 is an explanatory view showing a meshing state of gears of the gear transmission mechanism of FIG. 4. FIG.

FIG. 6 is an explanatory view showing a meshing state of a conventional bevel gear.

FIG. 7 is an explanatory diagram showing a meshing state of a conventional spur gear.

FIG. 8 is an explanatory diagram showing a meshing state of a conventional pinion and an internal gear.

FIG. 9 is an explanatory view showing a comparison between a case where the driving force transmission device according to the present invention is used for a rear axle of a vehicle and a conventional driving force transmission device.

[Explanation of symbols]

 1 Internal Gear 3 Pinion 5 Bearing 5I, 6I Inner Ring 9 Outer Ring 11 Output Side Shaft 12 Input Side Shaft 13 Intermediate Shaft 14 Differential Shaft 15 Drive Shaft 18 Axle Case 22 Hub 23 Axle Support 24 Housing 39 Tire 42 First Support 43 Third 2 support 44 differential

Claims (3)

[Scope of utility model registration request] 1. An input-side shaft rotatably supported by a first support through a bearing, a driving force of the input-side shaft being transmitted, and a rotatably supported by a second support through a bearing. In the driving force transmission device having the output side shaft, the pinion provided at the end of one of the shafts intersects the shaft center of the input side shaft and the shaft center of the output side shaft, and A drive force transmission device comprising a gear transmission mechanism meshing with an internal gear having teeth inside a cone provided at an end thereof. 2. An inner ring of the bearing is formed in an outer portion of the input side shaft near the pinion, and an inner ring of the bearing is formed in an outer portion of the inner gear of the output side shaft. The driving force transmission device according to claim 1, which is characterized in that. 3. A driving force transmission system between a diff of a vehicle and a hub to which a tire is attached, wherein the diff shaft that outputs the driving force of the diff and the drive shaft to which the hub is attached cross each other. Interposing an intermediate shaft having the internal gear and the pinion at both ends, incorporating the gear transmission mechanism into the drive force transmission from the differential shaft to the intermediate shaft, and driving from the intermediate shaft to the drive shaft The driving force transmission device according to claim 1 or 2, wherein another gear transmission mechanism is incorporated in the force transmission.