JPH0424125A - Full time four-wheel drive - Google Patents

Abstract

PURPOSE:To secure such a pulltime four-wheel drive that is made compact in size and lighter in weight besides shortened in length as a whole by having both symmetrical rear axles driven by a mid shaft and a ring shaft tilted as much as several degrees with the center line of a car, and making a limited differential rotation of all axles performable by merely assembling one limited differential gear alone. CONSTITUTION:A left side gear 5 attached to a planetary carrier 2 on a ring gear 1 via a planetary gear 3 and a pin 4 is installed on the same axis with a left takeoff shaft 6, and a right side gear 7 is interlocked with a left hypoid gear 9 via an annular shaft 8. In addition, a toe center differential gear operates when a worm 11 is externally used for both symmetrical worm wheels 12, 13. In brief, the right worm wheel drives a right hypoid gear 15 via a shell 14, and a worm carrier 16 is driven at the same rotation as the ring gear 1 via the pin 4 and a mid shaft 17. At this time, in a rear gearcase 18, both symmetrical bevel gears 19, 20 are interlocked with a mid shaft 21 and an annular gear 22 installed as tilted to the side of the ring gear 1 from the center line of a car via each of longitudinal pinions 23, 24.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to improvements in a transverse engine type permanent four-wheel drive system.

(b) Conventional technology When applying a Torsen type limiting differential to a vehicle with a horizontally mounted engine, it is as shown in the first embodiment shown in the first drawing described in the specification of Japanese Patent Publication No. 1983-242729. , there was a problem with it being quite horizontal.

(c) Problems to be Solved by the Invention The present invention is directed to one of the known double differential devices that rotate differentially between the left front axle and the right rear axle, and between the right front axle and the left rear axle. The purpose of this project is to obtain a constant four-wheel drive system that uses a Tosen differential or screw coupling, and a conventional bevel gear differential, making the overall structure shorter, smaller, and lighter.

(d) Means for solving the problems The present invention will be explained below with reference to the drawings. FIG. 1 is a plan sectional view 1:1 showing the structure of a first embodiment of the present invention, and FIG. 2 is a skeleton diagram of its power train. A planetary gear 3 is attached to a planetary carrier 2 on a ring gear 1 via a pin 4, a left side gear 5 is provided on the same axis as a left take-out shaft 6, and a right side gear 7 interlocks a left hypoid gear 9 via an annular shaft 8. It has a structure that allows In the known Tosen differential 10, six worms 11 are connected to left and right worm wheels 12.
．． It operates in 13 external applications.

The right worm wheel integrally drives the right hypoid gear 15 via the shell 14, and its worm carrier 16 is driven via the bin 4 and the center shaft 17 at the same rotation as the ring gear 1. As shown in the third diagram, the rear gear case 18
Inside, left and right bevel gears (spiral gears) 19, 20 are provided on a central shaft 21 and an annular shaft 22, which are inclined at an angle of 3 degrees (example shown) toward the ring gear 1 from the center line of the vehicle, and are provided with front and rear pinions 23, 24, respectively. linked via.

(e) Operation The output of the engine 25 drives the clutch 26, transmission 27, drive gear 28, and ring gear \.1, and when the planetary carrier 2 and worm carrier 16 are rotated at the same rotation, the left worm wheel is rotated. Two different types of differential rotation can be obtained simultaneously between the right take-out shaft 29 and the left void gear 9 and the left take-out shaft 6 and the right hypoid gear 15, which are integrated with the front pinion 30, middle shaft 31, and ball joint 32. , through the middle propeller shaft 33, the middle shaft 21 in the rear gear case 18, the rear pinion 24, the right bevel gear 20, the universal joint 34, the flovera 7 shaft 35, the right rear axle 36, the right rear wheel 37,
On the other hand, the rear pinion 38 is circular! @39, known rubber joint) 40. Middle 2 propeller shaft 41, annular shaft 22
, the front pinion 23, the left bevel gear 19, the universal joint 34, the propeller shaft 35, and the left rear axle 42, respectively, to interlock the left rear wheel 43. Also, the left extraction shaft 6,
The right front wheel 48 is driven via the ball joint 44, the left front axle 45, the left front wheel 46, the right take-out shaft 29, the ball joint 44, and the right front axle 47, respectively. Reinforced plastic such as glass fiber is used for the middle propeller shaft 33 and the hollow propeller shaft 41, and intermediate support is omitted, resulting in a lightweight and simple structure.

(F) The second embodiment shown in the fourth embodiment is an application example in which the ring gear 1 is close to the center line of the vehicle, and is suitable for military vehicles with a small number of cylinders, and also improves design freedom. . In this case, the ring gear 1 is connected from the center via an annular shaft 49 and a pin 50 to a planetary carrier 51 shared by the worm 11 and the planetary gear 3.
), and the right side gear 7
Although the difference is that the left take-out shaft 6 and the left side gear 5 interlock the left hypoid gear 9 through the annular shaft 55 through the center shaft 54, the interaction is the same as in the first embodiment. The third embodiment shown in FIG. 5 is an application example in which the ring gear 1 is located far from the center line of the vehicle, and the rotation of the ring gear 1 is controlled via a shared planetary carrier 56 as in the second embodiment. It works. That is, the planetary carrier 56 interlocks the worm 11 and the planetary gear 3 with the same rotation via the annular shaft 57 and the pin 4, the left side gear 58 rotates the left hypoid gear 9 via the shell 59 and the annular shaft 60, and the right side gear 61 rotates. The difference is that the right hypoid 15 is rotated via the annular shaft 63 by the fabric worm wheel 13 which drives the left take-out 84i]6 via the center shaft 62. The operation in this case is the same as that in the first embodiment, and the left and right extraction shafts 6.2
The total length including 9 can be made extremely small.

The fourth embodiment shown in FIG. 6 uses a known normal double differential device 64, in which the rotation between the right take-out shaft 29 and the right hypoid gear 15 is limited by a viscous coupling 65, and a planetary carrier. As for the outer planetary gear 67 of the bin 4 of 66, the left outer side gear 68 interlocks the left take-out shaft 6, and the right outer side gear 69 rotates the left void gear 9 via the annular shaft 70. The inner planetary gear 71 connects to the right take-out shaft 2 via the left inner side gear 72 and the center shaft 73.
9 is directly connected and rotates, and the right inner side gear 74 is connected via an annular shaft 75 to the right hypoid gear 15 and the plate 78 on the center shaft through the phenol gear 7, which has the right hypoid gear 15 and a viscous coupling spring plate 76 inside, to reduce the limit difference of the viscous coupling. This is to prevent excessive rotation of the brake tarcarrier 66 at all times. Other operations are the same as in the first embodiment, and the entire structure is small and lightweight.

As described above, the present invention combines the Tosen Tef 10 or the viscous coupling 65 with the bevel type differential, and depending on the arrangement, various most suitable implementations can be achieved depending on the size of the engine 25, the vehicle body, and the wheelbase. .

(G) Effects of the Invention As described above, this invention provides a permanent four-wheel drive system for a vehicle with an engine transversely mounted by simply incorporating one limiting differential differential device, thereby achieving complete limiting differential differential for all four wheels. The front gear case 79 is assembled in one place near the ring gear 1, which has the effect of significantly reducing the overall size and reducing costs.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view showing a first embodiment of the present invention, and a second embodiment of the present invention is shown in FIG.
The figure is a skeleton diagram showing the power train, Figure 3 is a cross-sectional plan view showing the structure of its rear gear case, and Figure 4 is its second gear case.
FIG. 5 is a plan sectional view showing the third embodiment, and FIG. 6 is a plan sectional view showing the fourth embodiment. Explanation of symbols 80 Left-hand ratio shaft for rear wheels Right-hand shaft for rear wheels

Claims (5)

[Claims] (1) In a permanent four-wheel drive system with a horizontally mounted engine that uses a double differential device that differentially rotates between the left front axle and the right rear axle, and between the right front axle and the left rear axle, the centerline of the vehicle The left and right rear axles are driven by a center shaft and an annular shaft tilted several degrees to the left, and by simply incorporating one limiting differential device, limited differential rotation of all axles is possible. Drive device. (2) An interlocking device using front and rear pinions and left and right hypoid gears is provided between the bevel gear type differential device adjacent to the ring gear and the Torsen type differential device on the right side thereof, as set forth in claim 1. Permanent four-wheel drive. (3) A bevel gear type differential device and a torsion type differential device are driven by the same planetary carrier on the right side of an interlocking device using front and rear pinions and left and right hypoid gears adjacent to the right side of the ring gear. Permanent four-wheel drive. (4) A patent characterized in that a bevel gear type differential device and a Tosen type differential device adjacent to the ring gear are interlocked by the same planetary carrier, and an interlocking device using front and rear pinions and left and right hypoid gears is also provided on the right side of the same planetary carrier. A constant four-wheel drive device according to claim 1. (5) An interlocking device with front and rear pinions and left and right hypoid gears is installed on the right side of the double differential device adjacent to the ring gear, and a screw coupling is installed between the left inner side gear and the right inner side gear via the center shaft and annular shaft on the right side. The constant four-wheel drive device according to claim 1, characterized in that the differential is limited by the following.