JPS6223824A - Drive for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive system for converting a vehicle into a 4×4 drive vehicle, that is, an all-wheel drive vehicle, which includes a non-drive steering axle and a rear axle. . The device may also be used as a through drive to convert a 4 x 2, 2 wheel drive to a 6 x 4, 4 wheel drive vehicle. Additionally, the device can be used to convert a current 4x4 all-wheel drive vehicle to a 6x6 all-wheel drive vehicle.

[Prior Art and Problems to be Solved by the Invention] Tandem drives for vehicles are known. Eatonpt) r r
, ta tandem axle drive D381 or D
A typical tandem axle drive, such as the '11-P, comprises two axles, conveniently referred to as a forward axle assembly and a rear axle assembly. Both axle assemblies contain housings for the differential gear components. and the housings are arranged symmetrically with respect to the axle assembly.The forward axle assembly has an input shaft projecting from the housing for coupling to the drive shaft.A first helical gear is located within the housing. This first helical gear rotates freely with respect to the conventional kashaf), and for this purpose the first helical gear is fitted onto the input shaft.
The helical gear is properly fitted onto the input shaft via a bushing. A clutch mechanism is provided within the housing and is operable to couple the first helical gear to the shaft such that the first helical gear rotates with the shaft when desired. The helical gear surface is formed as a crown gear and forms part of the auxiliary differential. Four bevel pinion gears engage the crown gear and are diametrically opposed connected to the input shaft by spline connections. An output shaft extends from the housing and has a splined clarang gear at its inner end.The crown gear is driven by the four knob gears.

A second helical gear splined to the drive shaft is also disposed within the housing of the forward axle.The other end of the drive shaft has a drive pinion. A differential for driving a half axle of the forward axle is provided within the housing, and a drive binion engages a ring gear or crown wheel of the differential to drive the half axle.

The rear axle has a differential in its housing for driving the two half axles of the rear axle, the crown wheel or ring gear facing in the direction of the crown wheel of the main differential of the forward axle in a reflective direction. A driven shaft extends out through the housing and is coupled to the output shaft of the forward axle. The inner end of the driven shaft has a pinion gear for engagement with the crown wheel of the rear axle.The device is a typical tandem through drive and operates as follows. Under normal conditions, the dog clutch mechanism is disengaged and the auxiliary differential acts as a power splitter or inter-axle differential so that the rear axle can be driven at a speed different than the speed of the forward axle. Thus forward)
The output shaft from the housing does not need to rotate at the same speed as the drive shaft to the forward housing.

The first helical gear is free to rotate relative to the input shaft on the bushing. The inner axle differential will be locked by actuating the clutch mechanism. This effectively couples the first helical gear to the input shunt so that the first helical gear rotates with the input shaft. This disables the inter-axle differential and a direct through drive between the input shaft, the output shaft of the forward axle and the input drive shaft of the rear axle is achieved when the first helical gear is locked by the dog clutch mechanism. Since the auxiliary differential acts as a spur gear drive, in this way both axles are essentially driven at substantially the same speed. Such operation is necessary when the wheel attached to the axle loses traction.

In such prior art devices, the Dino wheel housing is often symmetrically distributed with respect to the axle assembly. Also, such devices are expensive to manufacture. These devices are specially designed for a tandem drive axle set. Problems to be Solved by the Invention It is an object of the present invention to provide a drive device which at least minimizes the aforementioned disadvantages. It is.

[Failure to solve the problem]

The foregoing objects of the invention include: a housing, an input shaft extending within the housing, a first output shaft extending from the housing, an output gear on a shaft within the housing or a second output shaft within the housing; a differential driven by the input shaft to drive the first output shaft; a driving means driven by the differential to drive the output gear or the second output shaft; and locking the differential. a clutch operable to engage and disengage said drive means for unlocking; and a clutch operable to engage and disengage said drive means for unlocking; The output power is transferred between the first output shaft and the output gear or the second output shaft.
This is achieved by means of a drive in which the differential acts as a power splitter between the output shafts.

According to another aspect of the invention, there is provided the aforementioned drive system associated with a rear or first axle assembly and a forward or second axle assembly, wherein a drive shaft from the vehicle is connected to an input shaft of the drive system. The second output shaft or the output gear may be coupled to drive a differential of the forward axle assembly, and the first output shaft may be coupled to drive a differential of the rear axle assembly.

According to another aspect of the invention, a method is provided for converting a vehicle having one driven rear axle assembly mounted to a chassis into a nine vehicle having a tandem rear axle assembly both driven. The method includes the steps of: mounting a second axle assembly with a differential onto the chassis; the vehicle's existing drive shaft is coupled to the input shaft of the drive; and the first output shaft of the drive is connected to the rear mounting said drive device on a first or forward rear axle assembly so as to be coupled to a differential of the axle assembly; the vehicle chassis housing two rear axle assemblies and a suspension mechanism; Preferably, it is extended to do so.

Preferably, the housing of the drive device is provided in several parts, which parts are suitably joined to one another. Preferably, these parts are joined by a plurality of fasteners. These parts include a main housing, a rear housing, an end cover and a cap.

The input shaft may be configured to couple to a vehicle drive shaft. Suitable coupling means, ie a coupling, may be formed on or fixed to the shaft. The coupling means may be fixed to the shaft. For example, the shaft may have a splined portion for receiving the coupling means, and the coupling means may be securely held against said splined portion by a fixture.

The drive means may include a drive gear driven by a differential. The drive gear may rotate freely relative to the input shaft and a suitable bearing may be provided between the drive gear and the shaft. Advantageously, the bearing comprises a bushing. The drive gear has means engageable by clutch means so as to be lockable relative to the shaft. The engageable means may comprise a plurality of teeth or protrusions. Preferably, frictional engagement is used. A plurality of teeth may be provided on one side of the drive gear for engagement by a clutch means.The drive gear has a gear portion formed on the other side of the drive gear for engagement by a differential. It is preferable that this gear is a crown gear.

The differential has multiple pinions mounted relative to the input shaft. The plurality of pinions may be mounted on a spider mounted on the shaft. Preferably, the spider is splined to the shaft.

The differential may have a crown gear.

The crown gear is coupled to the output shaft such that the shaft is driven by the differential. The crown gear can be splined to the output shaft or connected in some other way, such as by multiple keys, so that the crown gear can drive the output shaft.The output shaft can be a single shaft. It may be made to be coupled to that shaft to drive the.

For example, the output shaft may have fixed coupling means similar to the coupling means fixed to the input shaft. The clutch means operates to lock the drive gear relative to the input shaft, thus locking the differential gear. lock. The clutch means may frictionally or otherwise engage the drive gear. Other suitable clutches can be used for this purpose; a preferred clutch is a sliding dog clutch mounted on the input shaft and movable longitudinally along the input shaft (K); be. The input shaft may be splined to enable longitudinal sliding movement of the clutch.Operating means for engaging and disengaging the clutch may be provided. The actuating means may be hydraulic, mechanical, electrical or a combination thereof.

The first output shaft of the device may be suitably mounted within the housing and adapted to be coupled to a single driving shaft. The first output shaft may have coupling means similar to the coupling means fixed to the input shaft of the device. The first output shaft is driven by the differential, and for this purpose, in low case embodiments which may drive the gear shaft of the differential either directly or indirectly, the crown gear forming part of the differential is It may be coupled to the output shaft. The crown gear may be splined to the output shaft, although other coupling means such as keys may be used. One end of the first output shaft rests on a suitable bearing supported within the housing. The other end of the output shaft may be supported in the same way.The other end of the output shaft may be supported by the other end of the adjacent input shaft. [7] The input shaft may have an end hole for receiving the other end of the first output shaft, or vice versa. A suitable bearing or bushing may be provided between the input shaft and the end of the first output shaft.

The drive means may comprise one or more gears, chain drives or belt drives for driving the output gear or the second output shaft. Preferably, the second output shaft or output gear rotates in the same direction as the first output shaft.

A drive means is mounted for rotation within the housing and by a drive gear or drive chain interconnecting said second output drive shaft or drive gear and said input drive gear or drive chain interconnecting said input drive gear. It is preferred to have an idle gear driven. The idle gear or drive source drives an output gear or drive source mounted relative to the input shaft of the axle.

Advantageously, the housing has a plurality of internal chambers and a plurality of channels facilitating the flow of lubricant. Additionally, a plurality of channels of lubricant may be provided at the other end of the first output shaft. The device may include circulation means for circulating the lubricant through the nozzle. The circulation means may include a pump, and the pump may be driven to the first drive axle by an input shaft, a drive means, a second output shaft, or an output gear.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing one embodiment of the present invention.

FIG. 1 shows a tandem axle drive unit according to an embodiment of the present invention. The device of FIG. 1 has a drive device 10 according to the invention. A drive shaft 12 of a vehicle (not shown) is coupled to the drive device 10 via a universal joint 11. The drive device 10 has an output shaft 13, and the output shaft 1
3 is Universal Ji ■ India 14. The drive unit 10 is connected to the differential in the housing 17 of the rear axle assembly 18 via the shaft 15 and the universal cylinder 16, and is connected to the differential in the housing 21 of the forward axle assembly 22. The drive device 10 shown in FIG. 1 with a second output shaft 20 has pipelines 23, 24 through which a lubricating fluid passes. Each axle assembly 18.22 with a clutch (FIG. 3) actuated by a drive #10 cable 25 is connected to the vehicle body support WIK, and the axle assembly 22 is connected to the tin rings 26, 27 and wheels 28.29. connected to the axle assembly 18t-1 spring 11 ring 30°31 and wheel 32
．． 33. FIG. 2 is a detailed perspective view of the drive unit Wt10 shown in FIG. 1. The drive device 10 has a pump for lubricating fluid in part 34 of the housing. The pipeline 23 is a pipeline for lubricating fluid. FIG. 3 shows a sectional view of the drive device 10. The drive unit has an input shaft 40 equipped with a #10 spline 41, and a drive coupling 42 is fixed to the input shaft 40. The drive coupling is held in place by a nut 43 that engages a threaded portion 44 of the shaft 40. The drive coupling 42 has a 7-rank section with a through hole 46 that is connected to the universal screwdriver door 11. to facilitate connection of the part to the flange part. The drive coupling 42 is supported by a nut 43
It has a concave portion 47 for use.

The drive I has an end cover 50.51 and a nodding part 52, 53, 54, 55, 56, 57°58.59
．． The 0 part 59 having a housing comprising fins has a cover plate 61 secured to the part 59 by means of fasteners 62. Plate 61 has a bump hardening 63 welded to it. Fixtures 64 secure various internal components of the pump (not shown) in place. Portion 52 is welded to end cover 50 and portion 53
A plurality of fasteners C22 placed in a plurality of threaded holes 66 in the
) is fixed to the part 53 by a fixture 65.

Section 54 is welded to section 53.55. A plurality of rigid feet 67 are connected to portion 55. F) 6 into a plurality of threaded holes 68 in portion 57. Section 58 is welded to section 57.59. Portion 59 is welded to portion 60 and a plurality of fasteners 69 extend through cover 51 and a plurality of threaded holes 70 in portion 60 to secure cover 51 in place.
placed in

A locating pin 7] extends between the cover plate 6 and the housing portion 590. Although the housing is manufactured in this way, with section 56 being stepped to accommodate section 55, the housing could be made from several castings if desired.

The input shaft 401 has a stepped shape to accommodate the thrust bearing 80. The bearing is cover 51
is held in place by tensioning it against the bearing. The coupling 42 has a cover portion 81;
Coupling 42 extends therefrom beyond seal 82 , which is disposed within a recess provided in the outer surface of cover 41 .

The input shaft 40 has an enlarged diameter portion 83 on which a spline 84 is formed, and a clutch 85 is mounted on the spline 84 so as to be movable along the spline 84 of the shaft. Clutch 85 has an inner surface 86 configured to engage surface 87 of gear 88 . Gear 88 is mounted on portion 89 of shaft 40 and is kept in the desired position by spaced portions 90.91.

The member 91 is carried against the step 92 of the section 83 of the shaft 40 and the bushing 05 is positioned on the shaft section 89. Thus, in the position shown in FIG.
is freely rotatable with respect to the shaft 40.

The differential 100 is a portion 102 of the shaft 40.
The spline 101 extends along the spline 101 .

Differential 100 includes a spider 103 mounted against splines 101 . Circlip 1
02 pinions 10 with 04 positioned on the portion 102 of the shaft 40 between the slider 103 and the bushing 105
6°107 is monitored against spider 103.

And the end half, that is, the split case 108°1
Loss bullet case 1 held in place by 09
08, 109 are typically held in position ai by fasteners such as 110 located around the case halves. The gear 88 is formed with a crown gear 111 which meshes with the pinions 106, 107 and two other pinions not shown (11B) which extends into the end cover 50. The shaft 115 has a spline 116 and a spline 1
A crown gear 117 is placed on the shaft 16 . A circlip 118 holds the shaft 115 in place. The shaft 315 has a blind hole that receives the end 119 of the shaft 41. The enlarged portion of the hole supports a bushing 120 that supports the end 119. The bore has a reduced portion, the purpose of which is to ensure that the bearing 130 extends around the end of the run gear 117, 9, and connects the crown gear 117 and shaft 115 for rotation. A supporting D other bearing 131 supports the shaft 115 midway between both ends. Bearings 131 are located within the end covers and held in place by circlips 132.

An output coupling 135 similar to coupling 42 has a nut 136 that engages threads 137 on shaft 115.
is secured to the outer end of shaft 115 by. Coupling 135 connects splines 138 on shaft 115
and rotates with the shaft. Coupling 13
5, a lock nut 136 having a cover portion 139 extending beyond the end of the cover 50 and the shield seal 140 is placed inside the recess 141 of the coupling.

The coupling 135 has an opening 143 and a 97 flange 42, the flange 42 being a universal
4 to allow pressure to be fixed.

An intermediate gear 150 is mounted for rotation around a shaft 151. The central portion of the shaft 15 supports a bearing 152, and a gear 1 is mounted around the bearing 1520.
50 is positioned.

A bearing having two races separated by a spacer 1501 abuts against a shoulder 153,
One end of the shear 7) 151, which is held against the rider 53 by a circlip 154, is supported in a cap 55 which carries an 013 ring 156. The other end of shaft 151 is supported in cap 157. A fastener 158 extends eccentrically into the cap 157 and into a threaded hole in the shaft 151.
prevent it from rotating. Nut 159 is threaded part 1
A spacer 161 that engages 60 and spacer 160a and ensures that the dual race bearing 152 is retained against the circlip 154 holds the enlarged portion 162 against the cap 155 and connects it to the enlarged portion of the shaft 162. Space is taken between the bearings 152. Gear 150 is in mesh with gear 88.

Output gear 170 is positioned within an opening in housing portion 57 by seal 71. Boss 172 is part 5
7 to help keep seal 171 in the de-energized position. The intermediate gear 150 meshes with the gear 170 and is driven by the gear 88, which in turn meshes with the pinion 10.
6, 107, so the shaft 115
and gear 170 both rotate in the same direction. gear 17
0 rests against the spline 173 of the shaft 174. Shaft 174 is the input shaft to the differential within the housing. Cavity 175 forms a sump for lubricating fluid from which it can be drained by a removable plug 176. Gear 170 is held in place relative to shaft 174 by a fastener 177 that engages threaded portion 178 .

The coupling 180 is secured to the gear 170 by a plurality of fasteners 181 that are secured to threaded holes in the gear 170.The coupling 180 engages splines 183 formed in the pumpshaft 7) 1844-. It has a boss 182. Thus, as gear 170 rotates, pump shaft 184 rotates and the pump directs fluid through outlet 185 to pipeline 23 (first
(see Figures 1 and 2). Pipeline 23 supplies lubricating fluid to inlet 190 [7, the inlet supplies lubricating fluid to main passage 1 to lubricate bearing 152
91 and a plurality of minor passages 192, passages 193 and 194 allow lubricating fluid to flow between gear 88 and gear 150 and between gear 150 and gear 1.
It is possible to lubricate each space between 70 and 70. Pipeline 24 branching from pipeline 23 (FIG. 1) feeds into inlet 195 and extends through longitudinal passage 196.
, radial passages 197, 198 and longitudinal passages 19
9 and feed it. The reduced hole 121 is the passage 19
8 and the longitudinal passage 2nO, the longitudinal passage 2
00 extends from one end of shaft 40 to radial outlet 201 . Passage 199 allows fluid to pass through bearings 131, 130,
Bushing 120°105 and differential 100
ensure that it flows to

The device of FIG. 3 is configured such that when clutch 85 is disengaged, two surfaces 86 . When R7 is not matched, shirt) 115,1
74 are driven at different speeds. Differential 100 drives gear 88 which rotates freely relative to shaft portion 89 and drives intermediate gear 150 which meshes with gear 170 to drive shaft 174.

The differential acts as a power splitter and ensures that the torque imparted by shaft 40 is divided between shaft 15 and shirt 174. An intermediate or idle gear 150 is necessary to ensure that shaft 115 and shaft 174 rotate in the same direction. When necessary, the clutch 85 engages the surface 86.
87. This thing is gear 88
is locked against the shaft 40, and the pinion 107°1
The differential and crown gears 117 and 111 formed by 06 are tightened and fixed,
A direct through drive between shaft 40 and shaft 115 is achieved. In this state, both shirts) 115,1
74 can be driven at the same speed, and the available power is divided equally between shaft 115 and shaft 174.

The dandem drive assembly shown in Figures 1 and 2 with housings 17, 21 offset as shown operates so that both differentials within the housing can be driven in the same direction. Thus both axles 18.22 can be identical and therefore the required smoothing parts for the axles are also the same υ
, the number of replacement parts that need to be stocked can be reduced. This is not the case with existing tandem drives, in which case the inner axle differential is formed into the front drive axle, and thus the multiple crown wheels and binions are necessarily different. ratio and driving in opposite directions.

The oil pump 200 is eccentrically mounted and has a pickup consisting of an elbow, to which a chain (not shown) may be secured. In this manner, fluid is drawn up by the pump from the appropriate location within the sump 175.

An actuation shaft 210 is associated with the clutch 85. The inner end of the shaft 210 is slidably received and supported by a boss 212.

A fork-shaped clutch engaging member 215 is mounted on a sleeve that supports a sleeve 213 whose shaft is held in place by a set screw 214. The member 215 has two spaced apart fingers 216.
(only one finger is shown), and two fingers 216 engage within circumference #I 217 within clutch 85. As the shaft 20 reciprocates, the two fingers 2]6 move the clutch 85 along the spline 84 into and out of engagement with the surface 87 of the gear 88.

It should be understood that the output gear 170 or output shaft chain may be driven by the gear 88 via the belt, with the intermediate or idle gear 150 and its associated components removed.

In this manner, gear 170 (or output shaft) will rotate in the same direction as output shaft 115 as required. Obviously the device must have a pump for the lubricating fluid. The housing is connected via the syringe hole 218 to the i
It just needs to be filled and blocked by the body.

The drive of the invention differs from known through-drive tandem drive assemblies in which power is distributed outside the drive housing of the front drive axle and is thus constructed as part of the front drive axle.

The device of the invention allows the use of standard drive axles, which means that drive systems can be combined which considerably reduces manufacturing costs and inventory.

The drive device of the present invention can be used for two-wheel drive or four-wheel drive in 4×4.
drive, 6x6 drive, or 6x4 drive. To achieve this, the drive is connected to the output of the 10 drive gear/Q'J box. For a 6x6 conversion as shown in Figure 2, the chassis of the vehicle is lengthened and the rear drive axle assembly is mounted on the chassis together with suspension equipment
Drum ff? The shaft 40 from the IO is used to drive the rear axle assembly of the 6x6 converter.

As an example, a 4x4 wheel drive Toyota Land Cruiser can be easily converted into a Vc6x6 wheel drive vehicle. The Land Cruiser has a rear axle assembly with an offset differential housing.

The chassis is lengthened and the upper axle of the already provided or V-axle is inverted and secured to the chassis with suitable suspension fittings in the position where the original drive axle is located, and then the original The drive axle is repositioned behind the first axle on the extended part of the vehicle. Suspension equipment will be installed in the modified part.

Thus, because the drive system of the present invention is not a part of the front axle assembly, the drive system of the present invention can be used in two-wheel drive vehicles and four-wheel drive vehicles, 4x4 all-wheel drive vehicles, 6x4 tandem drive vehicles, Alternatively, the drive system of the present invention is an improvement over conventional tandem drives in that it can be readily used to facilitate conversion to 6x6 all-wheel drive vehicles.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tandem axle assembly showing one embodiment of the inventive drive device; FIG. 2 is a detailed view of the drive device of FIG. is the second
Figure Ii! 1-1c is a cross-sectional view of the drive device of FIG. 2; FIG. 1()... Drive unit U, 12... Drive shaft, 13... Output shaft, 17.21.
...Differential housing, 18.22
...Axle assembly, 20...2 output shaft, 40...Input kashaf), lnO...
... Differential, 115 ... Output shaft. ("I"': ζ, no change to 'white'τ) FIG,
1 Procedural amendment (method) August 7, 1985 Commissioner of the Patent Office Black 1) Yu Akira 1. Indication of case 1985 Patent Application No. 103241 2. Name of invention Vehicle drive device 3. Make amendments. Relationship with the applicant's case Name of patent applicant Toramanco (Australia) Proprietary Limited 4, Agent Shoko 061 Fuki July 29th (Hikari El) 6, Subject of amendment fi+ Column (2) Power of attorney (3) Specification (4) Drawing 7, content of amendments as attached to fllf21 (3) Engraving of the specification (no change in content) (4) Engraving of drawings (no change in content) 8. List of attached documents (1) Request for correction (1 copy) (2) Power of attorney and translation (1 copy each) (3) Engraved specification (1 copy) (4) Engraved drawings
Item M Procedure Correction Old (spontaneous) 1. Matters (Indication of SI 1 Patent Application No. 103241 of 1985 2, Name of the invention Vehicle drive device 3, Relationship with the case of person who makes supplementary rE Patent applicant name 1・→Manko (Aust Syria) P1] Ply Atari Limited 4, Agent address: 8-10-5 Shimome, Toranomon, Minato-ku, Tokyo 105
Subject of amendment ■) 1'4'+',i'l of the specification - Column 1 of Claims 2) Column 1 of Detailed explanation of the invention 1 of the specification 3) Drawings (Figs. 1 and 2) ) 6. Contents of Supplement+F 1) In the column of ``Attachment is [Supplement 11-2]'', the scope of claims should be specified as ■ Page 21, line 3 of the specification, ``1 Correct [-to be joined.] in the note to "1, etc. are added to joins 1 to 14 to be joined." ■ The 1 connected 214 “2
”. ■ One end half described in the fourth line of page 25 of the specification, J
Add one complement to "r half," ■ 1 in specification No. 256, line 17, 11 = 71-41
] to "Foot 40J." ■ Page 28, line 1 of the specification, "It is placed within the 1st part of 1 of description 1. be accommodated.” (2) Page 31 of the specification, line 2 [-1 to line 3] 1 described in 31 can be driven at the same speed, and -1 should be corrected to "are driven at the same speed." ■ “6×6 drive,” stated on page 33, line 18 of the specification.
Or ``6×4 drive'' is changed to ``6×4 drive or ε, l:
6 x 6 drive”. ■ [[
Foot 40... is used. ” to “Foot 115 is 6×
Universal joint 14, shaft 15 for 6 conversion
and is used to drive the rear axle assembly via universal joints 1-16. Correct to J. ■ 14x4 wheel drive stated on page 34, line 9 of the specification.
1 is corrected to ``4x4 four-wheel drive j. [Phase] ``First axle'' written on page 34, line 18 of the specification is corrected to ``first reversed.'' 3) Correct the illumination of the drawings (Figures 1 and 2) on separate sheets. 7. Attached list of documents 1) Amended claims 1iffi2)
14 side (Fig. 1, 21st view) 1. Claims 1. A housing, an input shaft extending within the housing, a first output shaft extending from the housing, and a shaft within the housing. a differential driven by the input shaft to drive the first output shaft; and a differential driven by the input shaft to drive the first output shaft; a drive means driven by said differential for driving; and a clutch operable to engage and disengage said drive means for locking and unlocking said differential. a power splitter that divides the power supplied to the input shaft between the first output shaft and the output gear or the second output shaft when the differential is unlocked by twisting; 2. The drive means has a drive gear and an idle gear driven by the drive gear, and the idle gear drives the output gear or the second output shaft. said output gear to drive the
! 2. The device of claim 1, wherein: the output gear or the second output shaft rotates in the same direction as the first output shaft. 3. The driving means is connected to the output gear or the second
2. Apparatus according to claim 1, comprising a belt or chain drive for driving the output shaft, whereby the second output shaft (1) or the output gear rotates in the same direction as the first output shaft. 4. The drive gear rotates freely relative to the input shaft when the clutch is disengaged, and the drive gear rotates with the input shaft when the clutch is engaged. 3. The device according to claim 2, wherein the device is locked to 5. The clutch is a sliding dog clutch, the input shaft has a splined clutch receiving portion, the clutch is mounted on the receiving portion, and the device engages the clutch. actuating means for moving between an engaged position and a disengaged position, wherein the clutch engages the drive gear in the engaged position and locks the drive gear to the input shaft; Claim 2 or 4, wherein the clutch is disengaged from the drive gear in the disengaged position and the drive gear rotates freely relative to the input shaft 6. Device. 6. The differential includes a plurality of pinions placed on the input shaft and rotating together with the input shaft, a crown gear placed on the first output shaft, and another crown integrally formed with the drive gear. A device according to any one of claims 2, 4, or 5, characterized in that the two crown gears are engaged with the pinion. 7. The crown gear is received on a spline formed on the first output shaft, and the plurality of pinions are received on a spline formed on the input shaft I. 7. The device according to claim 6, wherein: 8. One of the first output shaft or the input shaft 1- is formed with a blind hole extending into the end thereof, and the first output shaft or the other input shaft is formed in the blind hole. 8. A device as claimed in any one of claims 1 to 7, receiving an end and means for reducing friction between the end and the blind hole. 9. The blind hole is formed in the first output shaft,
9. The apparatus of claim 8, wherein the end received in the blind hole is the inner end of the input shaft and the friction reducing means is a bushing. 10. Any one of claims 1 to 9, comprising a lubricating fluid pump means for circulating a lubricating fluid through the device, the pump means being driven by the second output shaft or the output gear. The device according to item 1. 11. A coupling fixed to an outer end of the input shaft to enable the input shaft to be driven, and the first output shaft to be coupled to drive a differential connected to the first axle assembly. said eleventh (i) camp ring fixed to said shaft in order to enable said output gear or said second output shaft to be coupled to drive a dino gear in a first axle assembly. The apparatus according to any one of claims 1 to 10, which comprises: 12. a first axle assembly equipped with a differential; and a second axle assembly equipped with a differential; the first axle assembly is coupled to the first output shaft, and the second axle assembly is coupled to the output gear or second output shaft, such that the vehicle drive shaft is coupled to the input shaft. 13. The device according to any one of claims 1 to 11, which is coupled to a vehicle and drives two axle assemblies. 1. A method for converting a vehicle having one driven recess axle assembly located in the vehicle into a vehicle having a tandem II axle assembly having both wheels driven; step 7 of mounting the axle assembly on the chassis; a housing; an input shaft extending into the housing; a first output shaft extending from the housing; and output gears 1 through 1 in the housing; a second output shaft within the housing; a differential driven by the input shaft to drive the first output shaft; and a differential driven by the input shaft to drive the output gear or the second output shaft. a driven drive means and a clutch operable to engage and disengage said drive means for locking and unlocking said differential; When the differential is unlocked, the differential acts as a power splitter that divides the power supplied by the input shaft between the first output shaft and the output gear or the second output shaft. mounting a drive device on a vehicle and coupling a vehicle drive shaft to the input shaft;
A method for modifying a vehicle comprising the steps of: coupling a second output shaft or output gear to a rear axle assembly; and coupling a second output shaft or output gear to a rear axle assembly. 14. Claim 13 comprising extending the chassis to accommodate a two-axle assembly.
The method described in section. FIo, 1

Claims (1)

[Claims] 1. A housing, an input shaft extending within the housing, and a first output shaft extending from the housing;
an output gear on a shaft in the housing or a second output shaft in the housing; a differential driven by the input shaft to drive the first output shaft; a drive means driven by said differential for driving; and a clutch operable to engage and disengage said drive means for locking and unlocking said differential. as a power splitter thereby dividing the power supplied by the input shaft between the first output shaft and the output gear or the second output shaft when the differential is unlocked; A drive device on which a differential acts. 2. The drive means has a drive gear and an idle gear driven by the drive gear, and the idle gear is connected to the output gear in order to drive the output gear or to drive the second output shaft. 2. The apparatus of claim 1, wherein the output gear or the second output shaft rotates in the same direction as the first output shaft. 3. The driving means is connected to the output gear or the second
2. Apparatus as claimed in claim 1, including a belt or chain drive for driving an output shaft so that said second output shaft or said output gear rotates in the same direction as said first output shaft. 4. The drive gear rotates freely relative to the input shaft when the clutch is disengaged, and the drive gear rotates with the input shaft when the clutch is engaged. 3. The device according to claim 2, wherein the device is locked to 5. The clutch is a sliding dog clutch, the input shaft has a splined clutch receiving portion, the clutch is mounted on the receiving portion, and the device engages the clutch. actuating means for moving between an engaged position and a disengaged position, wherein the clutch engages the drive gear in the engaged position and locks the drive gear to the input shaft; The device according to claim 2 or 4, wherein the crack is disengaged from the drive gear in the disengaged position and the drive gear rotates freely relative to the input shaft. . 6. The differential includes a plurality of pinions placed on the input shaft and rotating together with the input shaft, a crown gear placed on the first output shaft, and another crown integrally formed with the drive gear. 5. The apparatus according to claim 2, wherein the two crown gears are engaged with the pinion. 7. The crown gear is received on a spline formed on the first output shaft, and the plurality of pinions are mounted on a spider that is received on a spline formed on the input shaft. 7. The apparatus according to claim 6. 8. One of the first output shaft or the input shaft is formed with a blind hole extending into its end, and the other of the first output shaft or the input shaft is inserted into the blind hole. 8. A device as claimed in any one of claims 1 to 7, receiving an end and means for reducing friction between the end and the blind hole. 9. The blind hole is formed in the first output shaft,
9. The apparatus of claim 8, wherein the end received in the blind hole is the inner end of the input shaft and the friction reducing means is a bushing. 10. Any one of claims 1 to 9, comprising a lubricating fluid pump means for circulating a lubricating fluid through the device, the pump means being driven by the second output shaft or the output gear. The device according to item 1. 11. The first output shaft to be coupled with a coupling fixed to the outer end of the input shaft to enable driving of the input shaft, and the first output shaft capable of driving a differential in the first axle assembly. a coupling fixed to the first output shaft for the purpose of driving the output gear or the second output shaft to drive a differential in a second axle assembly. The device according to any one of the ranges 1 to 10. 12. A first axle assembly including a differential; and a second axle assembly including a differential, the first axle assembly being coupled to the first output shaft, and the second axle assembly being coupled to the output shaft. a gear or said second output shaft, whereby a vehicle drive shaft is coupled to said input shaft and drives a differential of two axle assemblies; The device according to item 1. 13. A method for converting a vehicle having one driven rear axle assembly mounted on the chassis of the vehicle into a vehicle having a tandem rear axle assembly in which both are driven; a second axle assembly having a housing, an input shaft extending within the housing, a first output shaft extending from the housing, and an output gear on the shaft within the housing or within the housing; a second output shaft; a differential driven by the input shaft to drive the first output shaft; and a differential driven by the input shaft to drive the first output shaft;
drive means driven by said differential to drive an output shaft and operable to engage and disengage said drive means to lock and unlock said differential; a clutch by which the power supplied by the input shaft is divided between the first output shaft and the output gear or the second output shaft when the differential is unlocked; mounting a drive device on a vehicle, on which the differential acts as an engine; coupling a vehicle drive shaft to the input shaft; coupling a first output shaft to a second axle assembly; a second output shaft or output. A method of modifying a vehicle comprising the steps of joining gears into a single rear axle assembly. 14. Claim 13 comprising extending the chassis to accommodate the second axle assembly.
The method described in section.