JPH08337125A - Inter-axle differential and drive system used for vehicle with two rear axles for driving wheels - Google Patents

Abstract

PURPOSE: To allow a travel even in the case of a uniaxial drive by providing a clutch for connecting and disconnecting a drive gear and an inter-differential to and from an input shaft, and another clutch for connecting and disconnecting the input shaft and the inter-differential to and from a power transmission shaft. CONSTITUTION: Regarding a vehicle equipped with two rear axles for driving wheels and applied to a heavy duty truck 50, an inter-axle differential ('differential' is hereinafter described as deff.) 10 used for receiving power from a transmission and then transmitting the power to a rear fore axle 51 and a rear aft axle 54, has an input shaft 11 as well as a power transmission shaft 12. Also, a drive gear 13 to gear with the drive pinion 34 of a front deff. 31 is loosely coupled to the input shaft 11. An inter-deff. 14 is also provided for transmitting rotation of the input shaft 11 as power to a drive pinion 42 of a rear deff. 32 via the power transmission shaft 12. Furthermore, clutches 15 and 16 are laid for connecting and disconnecting the inter-deff. 14 to and from the drive gear 13 and the shaft 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interaxle differential and a drive system used for a drive-wheel rear two-axle.

[0002]

BACKGROUND ART Normally, in a two-axle rear-wheel drive vehicle such as a heavy truck or a dump truck having a loading capacity of 10 tons or more,
The rear axles on the drive wheels are arranged in a two-axle tandem, with the front differential on the front and rear axles and the rear on the rear and rear axles.
The differentials are each arranged and power can be transmitted to the front and rear differentials with an interaxle differential. The interaxle differential has a structure that has the function of evenly distributing the power to the front and rear axles in the locked state and the function of preventing the imbalance of the driving force between the two rear axles. Therefore, on rough terrain, on slippery roads, and on steep slopes, the two-axle vehicle will be able to drive reliably thereafter, while the two rear axles will be driven even on level roads such as highways and general roads. When the vehicle can be driven by an axle drive, there is a large loss in power transmission, and as a result, fuel is consumed unnecessarily.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide an interaxle differential and a drive system used in a two-wheel vehicle with rear drive wheels, which enables traveling by a single-axis drive and improves the fuel consumption rate. .

Another object of the present invention is to provide an interaxle differential and drive used for a two-axle vehicle with rear drive wheels, which is simple and inexpensive, enables traveling by single-axis drive, and improves the fuel consumption rate. The system is provided.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an input shaft and a power transmission.
The shaft, a drive gear rotatably supported on the input shaft, an interferential coupled to the input shaft and the power transmission shaft, and the drive gear and the interferential input to the input gear.
Includes an input shaft clutch that connects and disconnects the shaft, and a power transmission shaft clutch that connects and disconnects its input shaft and inter-differential to its power transmission shaft, and is powered in differential and differential locked states. Can only be transmitted to the rear two axles or to the rear one axle. Of course, the differential state is a state in which the locked state is released and the imbalance of the driving force between the two axles is prevented.

Further, according to the present invention, a front differential which is connected to the drive shafts on the left and right of the rear front axle to transmit the power to the front drive pinion, and a power which is connected to the drive shafts on the left and right of the rear and rear axles. Is transmitted to the rear drive pinion, an input shaft, a power transmission shaft, a drive gear rotatably supported on the input shaft, the input shaft and the power transmission. An input shaft clutch that connects and disconnects the drive shaft and the interferential to the input shaft, the drive shaft and the interferential connected to the shaft, An interaxle differential assembled with a power transmission shaft clutch that connects and disconnects the transmission shaft, and an interaxle differential shift unit that operates its input shaft clutch and power transmission shaft clutch. And differentially and differentially locked to allow power to be transmitted to the rear two axles or only the rear axle.

Further, according to the present invention, the front differential which is connected to the left and right drive shafts of the rear and front axles to transmit power to the front drive pinion, and the power which is connected to the left and right drive shafts of the rear and rear axles. Is the rear drive
Rear differential transmitted to pinion, input shaft, power transmission shaft, drive gear rotatably supported on the input shaft, coupled to the input shaft and power transmission shaft With an input shaft clutch that connects and disconnects the inter-differential, its drive gear and inter-differential to its input shaft, and a power transmission shaft clutch that connects and disconnects its input shaft and inter-differential to its power transmission shaft The assembled interaxle differential and then one of the drive axles to the left and right of the front axle is its front differential. And free wheeling clutch which Le, inter axle differential shifting to operate the input shaft clutch and power transmission shaft clutch
Includes a unit and a free wheel clutch shift unit that operates its free wheel clutch, and can transmit power to only one rear axle in the differential state, freeing the remaining rear axle at that time -It can be placed in the wheel state and the power can be transmitted to the rear two axles in the differential lock state.

Furthermore, the present invention is directed to an input shaft, a power transmission shaft connected to the input shaft, a drive gear rotatably supported on the input shaft, and a drive gear for the drive gear. Includes an input shaft clutch that connects and disconnects the gear to its input shaft, and enables transmission of power to only one rear axle when the clutch is disengaged, and transmits power to the rear two axles when the clutch is engaged. enable.

Further, according to the present invention, a front differential which is connected to the drive shafts on the left and right of the rear front axle to transmit power to the front drive pinion, and a drive differential which is connected to the left and right drive shafts of the rear and rear axles. Rear differential that power is transmitted to the rear drive pinion,
Input shaft, power transmission shaft coupled to the input shaft, drive gear rotatably supported on the input shaft, and input shaft connecting the drive gear to the input shaft -Includes an interaxle differential assembled with a clutch and an interaxle differential shift unit that operates its input shaft clutch, and allows power to be transmitted to the rear axle only when the clutch is disengaged, Then, the power can be transmitted to the rear two axles while the clutch is engaged.

Still further, according to the present invention, there is provided a front differential which is connected to left and right drive shafts of a rear front axle and transmits power to a front drive pinion,
Rear differential, which is coupled to the left and right drive shafts of the rear and rear axles, and whose power is transmitted to the rear drive pinion, the input shaft, and the power transmission shaft coupled to the input shaft,
An interaxle differential assembled with a drive gear rotatably supported on its input shaft, and an input shaft clutch that connects and disconnects the drive gear to the input shaft, and then left and right drive of the front axle. A free wheel clutch that connects and disconnects one of the shafts to its front differential, an interaxle differential shift unit that operates its input shaft clutch, and a free wheel clutch that operates its free wheel clutch. A clutch shift unit is included, and when the clutch is disengaged, the power can be transmitted to only one rear axle, and the remaining rear axle at that time is placed in the free wheel state. Can be transmitted to the rear two axles To.

[0011]

DESCRIPTION OF SPECIFIC EXAMPLES Specific specified examples of the interaxle differential and the drive system used in the two-wheel drive rear wheel axle of the present invention will be described with reference to the drawings. 1 and 2 schematically show embodiments 10 and 30 of the interaxle differential and drive system used in the drive wheel rear two-axle of the present invention applied to a heavy truck 50. The drive system 30 receives power from a transmission (not shown) mounted on the heavy truck 50 and receives power from the rear front axle 51.
Further, the interaxle differential 10 is utilized as an input mechanism for transmitting to the rear-rear axle 54.

The drive system 30 is then connected to the front axle 5.
The front drive, which is coupled to the left and right drive axles 52, 52, transmits power to the front drive pinion 34.
The differential 31 and then the left and right drive shafts 55, 55 of the rear axle 54 are connected to the rear drive power.
Rear differential 3 transmitted to pinion 42
2, an input shaft clutch 15 and a power transmission shaft clutch 16, and its interaxle for transmitting power by connecting and disconnecting its front differential 31 and rear differential 32 to the transmission.
A free wheel clutch 33 that connects and disconnects the differential 10 and one of the left and right drive shafts 52, 52 of the front axle 51 to and from the front differential 31.
An interaxle differential shift unit (not shown) for operating the input shaft clutch 15 and the power transmission shaft clutch 16 and a free wheel for operating the free wheel clutch 33. It is assembled with a clutch shift unit (not shown).

The front differential 31
Is its front drive pinion 34, which is rotatably supported in a front differential carrier (not shown), its front drive pinion 3
4, a front ring gear 36 that is engaged with the front gear 4, a front differential case 37 that integrally couples the front ring gear 36 and rotatably supports the front differential carrier,
4 in the front differential case 37
Four front differential pinion shafts 38, 38 (two not shown) are rotatably supported by four front differential pinions 39, 39 (two not shown). , And then assembled with left and right front side gears 40, 40 that are splined to the left and right drive shafts 52, 52 of the front axle 51 and meshed with their four front differential pinions 39, 39, and The power input to the front drive pinion 34 is transmitted to the left and right drive shafts 52, 52.

The rear differential 32 has its rear drive pinion 42 rotatably supported by a rear differential carrier (not shown).
A rear ring gear 43 that is engaged with the rear drive pinion 42 in the rear differential carrier, and the rear ring gear 43 are integrally coupled and rotatably supported by the rear differential carrier. Rear differential
Case 44, its rear differential case 4
Four rear differential pinion shafts 45, 45 (two of which are not shown) are rotatably supported by four rear differential pinion shafts 46, 46 (two of which are not shown). (Not shown), and after that, the four rear differential pinions 4 are spline-coupled to the left and right drive shafts 55, 55 of the rear axle 54.
It is assembled by the left and right rear side gears 47, 47 meshed with 6, 6, and the power input to the rear drive pinion 42 is transmitted to the left and right drive shafts 55, 55.

The interaxle differential 10 has an input shaft 11 which is rotatably supported in the transfer case by extending a front end portion thereof to the outside of a transfer case (not shown) and a transfer case of the transfer case. Power that is rotatably supported in the transfer case by extending the rear end part to the outside.
Transmission shaft 12, its input
The front of which is rotatably supported on the shaft 11
The drive gear 13 meshed with the front drive pinion 34 of the differential 31, the input shaft 11 and the power transmission shaft 1 in the transfer case.
Two, and its input shaft 11
From the drive gear 13 to the drive gear 13 and via the power transmission shaft 12 to the rear drive pinion 42 of the rear differential 32, the drive gear 13 and the inter-differential 14.
Shaft clutch 15 for connecting and disconnecting the input shaft 11 to and from the input shaft 11, and a power transmission shaft clutch 16 for connecting and disconnecting the input shaft 11 and the differential 14 to and from the power transmission shaft 12.
And the input shaft 11 is a propeller that transmits power from its transmission.
Power that is connected to the shaft 57 by a universal joint and is input to the input shaft 11 is transmitted to the front and rear differentials 31, 32.

The power transmission shaft 12 is connected to the rear drive 32 of the rear differential 32 via a biaxial propeller shaft 48.
It is connected to the pinion 42 and can transmit power to the rear differential 32.

The drive gear 13 is rotatably supported on an intermediate portion of the input shaft 11 and is meshed with a pinion drive gear 35 of the front drive pinion 34, and its front differential 31. It is possible to transmit power to.

The inter-differential 14 is fixedly mounted on the rear end portion of the input shaft 11 by a spline connection and is rotatably supported by the inter-differential case 17. The four inter-differential pinion shafts are rotatably supported. 18, 1
8 (two are not shown), 4 inter-differential pinions 1 rotatably supported on the inter-differential pinion shafts 18, 18.
9, 19 (two not shown), an interferential front side gear rotatably supported on the rear end portion of the input shaft 11 and meshed with the interferential pinion 19, 19. 20 and an interferential rear side gear 21 which is splined to the front end portion of the power transmission shaft 12 and is meshed with the interferential pinion 19, 19 and is assembled with the interferential front side gear 21. The side gear 20 has its input shaft clutch 15
The shaft 11 and the drive gear 13 are connected / disconnected, while the differential case 17 thereof is connected to the power transmission shaft clutch 1 of the power transmission shaft clutch 1.
At 6 the power transmission shaft 12 is connected and disconnected. And this inter-differential 1
4 is its input shaft clutch 15 and power transmission
The shaft clutch 16 is placed in a differential state or a differential locked state according to the connecting / disconnecting operation of the shaft clutch 16, and the power can be transmitted only to the rear two axles or to the rear one axle.

The input shaft clutch 15
Is the sleeve 22 and the gear spline of the drive gear 13 is the interferential front.
It is embodied in a dog clutch that is meshed with the clutch gear of the side gear 20, and its interaxle differential shift unit moves its sleeve 22 from the disengaged state and its gear
Meshed with the spline to mesh the gear spline with the clutch gear, and power to the drive gear 13, pinion drive gear 35,
And via front drive pinion 34 to its front differential 31.

The power transmission shaft clutch 16 has a sleeve 23, and the gear spline of the power transmission shaft 12 has an interferential rear side gear 21.
Embodied in a dog clutch that is meshed with the clutch gear of, and its sleeve 2 by its interaxle differential shift unit.
3 is disengaged and engaged with its gear spline to engage its gear spline with its clutch gear, and power is applied to its power transmission shaft 12, biaxial propeller shaft 48, and rear. It is possible to transmit to the rear differential 32 via the drive pinion 42.

The free wheel clutch 33 is
In the front differential 31, one of the left and right front side gears 40, 40 is rotatably supported by the front differential case 37 by a side gear shaft 41, and a sleeve 49 is used. The gear spline of one drive shaft 52 is embodied in a dog clutch that is meshed with the clutch gear of its side gear shaft 41,
Then, the sleeve 49 is moved from the disengaged state by the free wheel clutch shift unit, meshed with the gear spline to mesh the gear spline with the clutch gear, and the drive shaft 52 is It is placed in the lock wheel state so that power can be transmitted also to its drive shaft 52. That is, the power is transmitted to the left and right drive shafts 52, 52. Of course,
When the sleeve 49 is in the disengaged state, the gear spline and the clutch gear are disengaged so that the drive shafts 52, 52 are placed in the free wheel state.

The interaxle differential shift unit is composed of an input shaft clutch shift unit and a power transmission shaft clutch shift unit, and the input shaft clutch shift unit. The unit includes a shift fork engaged with the sleeve 22 of the input shaft clutch 15, an air shift cylinder for moving the shift fork, and a solenoid valve for supplying and discharging compressed air to the air shift cylinder. Included, and the input shaft clutch switch actuates the solenoid valve to engage and disengage the input shaft clutch 15. Further, the power transmission shaft clutch shift unit is provided with a sleeve 23 of the power transmission shaft clutch 16.
A separate shift fork engaged with the second shift fork, a separate air shift cylinder for moving the separate shift fork, and a separate solenoid valve for supplying and discharging compressed air to and from the separate air shift cylinder, and The power transmission shaft clutch switch actuates the other solenoid valve to engage and disengage the power transmission shaft clutch 16.

The free wheel clutch shift unit comprises a further shift fork which is engaged with the sleeve 49 of the free wheel clutch 33, a further air for moving the further shift fork. A shift cylinder, and yet another solenoid valve for feeding and exhausting compressed air to and from that further air cylinder, and operating that further solenoid valve with a free wheel clutch switch Engage and disengage the wheel clutch 33.

Next, the operation of the drive system 30 utilizing the interaxle differential 10 will be described with reference to the running of the heavy truck 50. When the heavy truck 50 travels on a flat paved road, the heavy truck 50 assumes the 6 × 2 state in FIG. 2, that is, the free wheel state. That is, the power transmission shaft clutch switch is turned on and the power transmission
The shaft clutch shift unit is activated and its power transmission shaft clutch 1
6 is connected and at the same time its input shaft clutch switch and free wheel clutch
Since it is switched off, its input shaft clutch 15 and free wheel clutch 3
3 is put in a cut state, that is, in a cut state. Therefore, its input from its transmission
The power input to the shaft 11 is transmitted to the left and right drive shafts 55, 55 of the rear axle 54 via the power transmission shaft 12, the biaxial propeller shaft 48, and the rear differential 32,
Then, it is transmitted to the left and right drive wheels 56, 56. on the other hand,
The front axle 51 is then placed in the free wheel condition. In that way, the heavy truck 50 is driven by a rear single-axis drive, and as a result, the drive loss of the front axle 51, that is, the power transmission loss is avoided thereafter, and the fuel is not consumed more than necessary, and accordingly, The economy which is important for the heavy truck 50 is greatly improved.

When the heavy truck 50 travels on a slippery road surface, the heavy truck 50 takes the 6 × 4 interaxle differential state in FIG. That is, its input shaft
Clutch switch and free wheel clutch switch is turned on and its input shaft clutch shift unit and free wheel clutch shift unit are actuated to its input shaft clutch 15 and free wheel The clutch 33 is engaged and, at the same time, its power transmission shaft clutch switch is switched off so that its power transmission shaft clutch 16 is placed in the disengaged or disengaged state. Therefore, the interaxle differential 10 is placed in a differential state, and the interaxle differential 10 then exerts a differential action between the front axle 51 and the rear axle 54. Therefore, from the transmission to the input shaft 11
The power input to is the differential 1
4, drive gear 13, pinion drive gear 3
5, through the front differential 31 and then to the left and right drive shafts 52, 52 of the front axle 51, and
It is transmitted to the left and right drive wheels 53, 53, and at the same time, through the power transmission shaft 12, the biaxial propeller shaft 48, and the rear differential 32, and then the left and right drive shafts 55, 55 of the rear axle 54.
And to the left and right drive wheels 56, 56. In that way, the interaxle differential 10 performs a differential action, so that the imbalance of the driving force generated between the two axles 51 and 54 is adjusted thereafter, and the heavy truck 50 travels smoothly.

Further, when the heavy truck 50 is started on rough terrain or muddy ground, the heavy truck 50 is in the 6 × 4 interaxle differential lock state in FIG. That is, its input shaft clutch switch, power transmission shaft clutch switch, and free wheel clutch switch are turned on,
The input shaft clutch shift unit, the power transmission shaft clutch shift unit, and the free wheel clutch shift unit are activated to input the input shaft clutch 15, power transmission.
The shaft clutch 16 and the free wheel clutch 33 are all engaged. In this case, the interaxle differential 10 is placed in the differential lock state because the input shaft clutch 15 and the power transmission shaft clutch 16 are simultaneously connected. Therefore, its input from its transmission
The power input to the shaft 11 passes through the inter-differential 14, the drive gear 13, the pinion drive gear 35, and the front differential 31, and then the left and right drive shafts 52, 52 of the front axle 51.
To the left and right drive wheels 53, 53,
At the same time, its inter-differential 14, power
Transmission shaft 12, two-shaft propeller
It is transmitted via the shaft 48 and the rear differential 32 to the left and right drive shafts 55, 55 of the rear axle 54 and then to the left and right drive wheels 56, 56. As a result, the same driving force of the heavy truck 50 is transmitted to the front axle 51 and the rear rear axle 54 after that, and a strong start is possible.

FIGS. 3 and 4 schematically show examples 60, 70 of the interaxle differential and drive system used in the drive wheel rear two-axle of the present invention as applied to its heavy truck 50. There is. The interaxle differential 60 is provided in a simple structure, and the drive system 70 receives power from the transmission mounted on the heavy truck 50 and then transmits the power to the front axle 51 and the rear rear axle 54. The interaxle differential 60 is utilized for the input mechanism of the system to simplify the system.

The drive system 70 is then connected to the front axle 5
The front differential 31 is connected to the left and right drive shafts 52, 52 of the vehicle 1 to transmit power to the front drive pinion 34, and is then connected to the left and right drive shafts 55, 55 of the rear axle 54 to drive power to the rear.・ Rear differential 32 transmitted to drive pinion 42
An input shaft 11, a power transmission shaft 12 coupled to the input shaft 11, a drive gear 13 rotatably supported on the input shaft 11, and a drive gear 13 for the input. An interaxle differential 60 assembled with an input shaft clutch 61 that connects and disconnects with the shaft 11, and a free wheel clutch that connects and disconnects one of the left and right drive shafts 52, 52 of the front axle 51 with the front differential 31. 33, an interaxle differential shift unit (not shown) for operating the input shaft clutch 61, and its free
It is assembled with a free wheel clutch shift unit (not shown) that operates the wheel clutch.

The interaxle differential 60 is embodied in a simple structure to allow a free wheel state and an interaxle differential locked state. Of course, the drive gear 13
Is engaged with the pinion drive gear 35 of the front drive pinion 34 at the front differential 31 so that power can be transmitted to the front differential 31.

The input shaft clutch 61
Is the sleeve 62, and the gear spline of the drive gear 13 is the clutch of the input shaft 11.
It is embodied in a dog clutch that is meshed with a gear, and its interaxle differential shift unit moves its sleeve 62 out of the open state and is meshed with that gear spline to move that gear spline to that clutch. It engages with the gear and allows power to be transmitted to its front differential 31 via its drive gear 13 and pinion drive gear 35. Of course, the interaxle differential shift unit is that input shaft clutch shift unit utilized in the interaxle differential 10 and drive system 30 described above. In addition, the free wheel clutch shift unit is based on the aforementioned interaxle differential 10
And its free use in the drive system 30
It is a wheel clutch shift unit.

Next, the operation of the drive system 70 utilizing the interaxle differential 60 will be described with reference to the running of the heavy truck 50. When the heavy truck 50 travels on a flat paved road, the heavy truck 50 assumes the 6 × 2 free wheel condition in FIG. That is, since the input shaft clutch switch and the free wheel clutch switch are turned off, the input shaft clutch 61 and the free wheel clutch 33 are in the disengaged state, that is, the disengaged state. It has been placed. Therefore, the power input from the transmission to the input shaft 11 passes through the power transmission shaft 12, the biaxial propeller shaft 48, and the rear differential 32, and then the left and right drive shafts 55 of the rear axle 54. , 55
Is transmitted to the drive wheels 56, 56 on the left and right sides thereof. On the other hand, thereafter, the front axle 51 is placed in the free wheel state. The heavy truck 50 is driven by a rear single-axis drive, and as a result, after that, the drive loss of the front axle 51,
That is, power transmission losses are avoided and fuel is not consumed unnecessarily, which in turn greatly improves the economics of the heavy truck 50.

Further, when the heavy truck 50 is started on rough terrain or muddy ground, the heavy truck 50 is in the 6 × 4 interaxle differential lock state in FIG. That is, its input shaft clutch switch and free
The wheel clutch switch is turned on, and its input shaft clutch shift unit and free wheel clutch shift unit are activated so that all of its input shaft clutch 61 and free wheel clutch 33. Connected. Therefore, the power input from the transmission to the input shaft 11 passes through the drive gear 13, the pinion drive gear 35, and the front differential 31 and then to the left and right drive shafts 52, 52 of the front axle 51. , And to the left and right drive wheels 53, 53, and at the same time, through the power transmission shaft 12, the biaxial propeller shaft 48, and the rear differential 32, and then the left and right drive shafts 55 of the rear axle 54. , 55 and to the left and right drive wheels 56, 56. As a result, the same driving force of the heavy truck 50 is transmitted to the front axle 51 and the rear rear axle 54 after that, and a strong start is possible.

As is apparent from the specific embodiments of the present invention described above with reference to the drawings, those skilled in the art to which the present invention pertains have ordinary skill in the art. Is the nature of the invention (na
It is easily embodied in another embodiment that is derived from the true) and the substance, and that is objectively recognized as having them internalized. Of course, the contents of the present invention correspond to the subject of the invention (be commensu).
rate with) and is essential for the establishment of the invention.

[0034]

Benefits of the Invention As will be understood from the above, the interaxle differential used in the two-wheel drive rear axle of the present invention has an input shaft, a power transmission shaft, and an input shaft. A drive gear that is rotatably supported, and an inter-differential that is coupled to its input shaft and power transmission shaft,
Because it includes an input shaft clutch that connects and disconnects its drive gear and inter-differential to its input shaft, and a power transmission shaft clutch that connects and disconnects its input shaft and inter-differential to its power transmission shaft. In the inter-axle differential used in the two-wheel drive rear wheel of the present invention, the input shaft clutch and the power transmission shaft clutch are connected simultaneously or selectively and independently. This makes it possible to drive the two rear axles of the drive wheel in the differential state and the differential lock state, and on slippery roads, the drive that occurs between the two axles thereafter. The unbalance of the two-axle vehicle is smoothed after that, and the driving of the rear axle is possible, and the driving loss of the remaining rear axle is avoided and the fuel is consumed more than necessary on a flat paved road. Not, i.e., the fuel consumption rate is improved and the economy is improved for the drive wheel rear two-axle, and as a result, it is very useful and practical for the drive wheel rear two-axle.

The drive system used for the two-wheel drive rear wheel axle of the present invention includes a front differential that is connected to the drive shafts on the left and right of the rear front axle and that transmits power to the front drive pinion. Rear differential, which is connected to the left and right drive shafts of the rear and rear axles and transmits power to the rear drive pinion, and the input shaft, power transmission shaft, and rotatably supported on the input shaft. A drive gear, an input differential that is coupled to the input shaft and the power transmission shaft, an input shaft clutch that connects and disconnects the drive gear and the differential to the input shaft, and an input shaft and Power disconnecting the printer differential to the power transmission shaft
Since the inter-axle differential assembled by the transmission shaft clutch and the inter-axle differential shift unit for operating the input shaft clutch and the power transmission shaft clutch are included, the drive wheel rear of the present invention is included. In a drive system used in a two-axle vehicle, its input shaft clutch and power transmission shaft clutch can either be connected simultaneously or selectively and independently by connecting their interaxle differentials. The power can be transmitted to the two rear axles of the drive wheel rear two axles in the differential state and the differential lock state, and the drive force generated between the two axles on a slippery road surface. Imbalance is prevented and the running of the two-axle vehicle becomes smoother thereafter.In addition, when starting on rough terrain or muddy ground, the same driving force is secured for the two axes thereafter, and the starting ability of the two-axle vehicle is improved thereafter. In addition, rear uniaxial drive is also possible, and on flat paved roads, the remaining rear uniaxial drive loss is avoided and fuel is not consumed more than necessary, that is,
The fuel consumption rate is improved and, accordingly, the economy is improved for the drive wheel rear two-axle, and as a result, it is very useful and practical for the drive wheel rear two-axle.

Further, the drive system used in the rear two-wheel drive wheel system according to the present invention includes a front differential that is connected to the drive shafts on the left and right of the rear front axle and that transmits power to the front drive pinion. Rear differential that is connected to the left and right drive shafts of the rear and rear axles and the power is transmitted to the rear drive pinion, and the input differential
Shaft, power transmission shaft, drive gear rotatably supported on its input shaft, its input shaft and power
An inter-differential coupled to the transmission shaft, an input shaft clutch connecting and disconnecting its drive gear and inter-differential to its input shaft, and a power connecting and disconnecting its input shaft and inter-differential to its power transmission shaft. An interaxle differential assembled with a transmission shaft clutch, and then a free wheel clutch that connects and disconnects one of the left and right drive shafts of the front axle to its front differential.
Since it includes an interaxle differential shift unit that operates its input shaft clutch and power transmission shaft clutch, and a free wheel clutch shift unit that operates its free wheel clutch, In the drive system used for the two-wheel drive rear wheel of the present invention, the input shaft clutch and the free wheel clutch are simultaneously connected, and the input shaft clutch and the power transmission shaft clutch are also connected. , And the freewheel clutch are engaged at the same time in the differential state of its interaxle differential, and in the differential locked state the power is the drive wheel rear two axles Allowing transmission to, and, on a slippery road surface then two unbalance of the driving force generated between the shaft is prevented to become a smoothly running subsequent biaxial wheel,
Also, in an emergency start, the driving force is secured for the two axles after that, and the startability of the twin axle is improved after that, and by connecting only the input shaft clutch, one of the two rear axles is in the free wheel state. After that, it becomes possible to drive the rear single shaft, and then the drive loss of one of the double shafts is avoided on the flat paved road, so that the fuel is not consumed more than necessary, that is, the fuel consumption rate is improved, and the drive wheels are correspondingly increased. The economy is improved for a rear two-axle, so that its drive wheels are very useful and practical for a rear two-axle.

Furthermore, the interaxle differential used in the two-wheel drive rear wheel drive system of the present invention includes an input shaft, a power transmission shaft coupled to the input shaft, and the input shaft. The drive gear that is rotatably supported by the
Since the input shaft clutch for connecting / disconnecting to / from the shaft is included, the interaxle differential used in the two-wheel drive rear wheel drive of the present invention is simple and inexpensive, and the input / shaft clutch is connected / disconnected. This makes it possible to drive the rear two axles of the drive wheel rear axle in the free wheel state and in the interaxle differential lock state, and on the flat paved road, the rear single axle drive becomes possible and the rest. The drive loss of the rear one-axle is avoided and the fuel is not consumed more than necessary, that is, the fuel consumption rate is improved, and accordingly, the economy of the two-axle rear drive wheels is improved, and The same driving force can be transmitted to each of the rear two axles when the vehicle starts in a muddy area, and then the two axles can start strongly. Subsequently improved startability biaxial wheel,
As a result, it is very useful and practical for the two-axle rear drive wheel.

Furthermore, the drive system used for the rear two-wheel drive wheel drive system according to the present invention includes a front differential that is connected to the drive shafts on the left and right of the rear front axle and that transmits power to the front drive pinion. , A rear differential that is connected to the left and right drive shafts of the rear-rear axle and the power is transmitted to the rear drive pinion, an input shaft, a power transmission shaft that is connected to the input shaft, and its input A drive gear rotatably supported on the shaft,
And an interaxle differential that is assembled with an input shaft clutch that connects and disconnects its drive gear with its input shaft, and an interaxle differential shift unit that operates that input shaft clutch. The drive system used for the two-axle rear drive wheel of the invention is simple and inexpensive, and its input
By connecting and disconnecting the shaft clutch, the two rear axles of the drive wheel can be driven in the free wheel state and in the interaxle differential lock state. It is possible to avoid the driving loss of one axle after the rest, so that the fuel is not consumed more than necessary, that is, the fuel consumption rate is improved, and accordingly, the economical efficiency is improved for the two-axle after the drive wheels. Is
Also, when starting on rough terrain or in muddy ground, the same driving force can be transmitted to each of the rear two axles, and then the two axles can be strongly started. The startability of the vehicle is improved, and as a result, it is very useful and practical for the two-axle rear drive wheel.

Furthermore, the drive system used for the two-axle rear drive wheel of the present invention is a front differential that is connected to the drive shafts on the left and right of the rear front axle and transmits power to the front drive pinion. And a rear differential that is connected to the left and right drive shafts of the rear-rear axle to transmit power to the rear drive pinion, an input shaft, a power transmission shaft that is connected to the input shaft, and its input.・ The drive gear rotatably supported on the shaft, and the interaxle differential assembled by the input shaft clutch that connects and disconnects the drive gear to and from the input shaft, and the drive shafts on the left and right of the front axle. One as the front differential Since it includes a free wheel clutch that contacts, an interaxle differential shift unit that operates the input shaft clutch, and a free wheel clutch shift unit that operates the free wheel clutch, The drive system used for the rear two-wheel drive wheel of the present invention is simple and inexpensive, and
By simultaneously connecting and disconnecting the shaft clutch and the free wheel clutch, the rear two axles of the drive wheel rear axle are in the free wheel state and the interaxle
It can be driven in the differential lock state, and on flat paved roads, it is possible to drive the rear single axis, avoiding the drive loss of the remaining rear single axis and consuming more fuel than necessary, that is, the fuel consumption rate is It has been improved, and the economy has been improved accordingly for the rear two-axle drive wheels, and the same driving force can be transmitted to each of the two rear axles when starting on rough terrain or muddy ground. After that, a strong start is possible for the two-axle vehicle, so-called, then, the startability of the two-wheel vehicle is improved, and as a result, it is very useful and practical for the two-axle vehicle after the drive wheels.

[Brief description of drawings]

FIG. 1 is a schematic view showing a specific example of an interaxle differential and a drive system used for a drive-wheel rear twin-axle of the present invention applied to a heavy truck.

FIG. 2 is a table showing the relationship between the clutch state and the drive wheels of the interaxle differential and drive system shown in FIG.

FIG. 3 is a schematic diagram showing a specific example of an interaxle differential and a drive system used for a drive wheel rear twin-axle of the present invention applied to a heavy truck.

FIG. 4 is a table showing the relationship between the clutch state and the drive wheels of the interaxle differential and drive system shown in FIG.

[Explanation of symbols]

10 Interaxle Differential 11 Input Shaft 12 Power Transmission Shaft 13 Drive Gear 14 Inter-Differential 15 Input Shaft Clutch 16 Power Transmission Shaft Clutch 30 Drive System 31 Front Differential 32 Rear Differential 33 Free Wheel clutch

Claims (24)

[Claims] 1. An input shaft, a power transmission shaft, a drive gear rotatably supported on the input shaft, and an interferential coupled to the input shaft and the power transmission shaft. When,
A drive that includes an input shaft clutch that connects and disconnects its drive gear and inter-differential to its input shaft, and a power transmission shaft clutch that connects and disconnects its input shaft and inter-differential to its power transmission shaft. Interaxle differential used for twin wheel rear axles. 2. A rear drive wheel according to claim 1, wherein the input shaft clutch is a dog clutch which is engaged by a sleeve with the drive device gear spline and with the inter-differential clutch gear. Interaxle differential used for two-axle vehicles. 3. A drive wheel rear two-axle according to claim 1, wherein the power transmission shaft clutch is a dog clutch, which is engaged by a sleeve with other clutch gears of the inter-differential. Interaxle differential to be played. 4. A dog clutch, the input shaft clutch of which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential,
And that power transmission shaft
An interaxle differential for use in a two-wheel drive rear axle as recited in claim 1, wherein the clutch is a dog clutch, which is engaged by a sleeve with other clutch gears of the interdifferential. 5. A front differential, which is coupled to the drive shafts on the left and right of the rear front axle to transmit power to the front drive pinion, and a rear drive, which is coupled to the left and right drive shafts of the rear and rear axles.・ Rear differential transmitted to the pinion, input shaft, power transmission shaft, drive rotatably supported on the input shaft
A gear, an inter-differential coupled to its input shaft and power transmission shaft, an input shaft clutch for connecting and disconnecting its drive gear and inter-differential to its input shaft, and its input shaft and inter-differential power·
An interaxle differential assembled with a power transmission shaft clutch that connects and disconnects with the transmission shaft, and an interaxle that operates the input shaft clutch and power transmission shaft clutch.
A drive system used for a two-wheel vehicle with rear drive wheels including a differential shift unit. 6. The rear drive wheel of claim 5, wherein the input shaft clutch is a dog clutch which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential. Drive system used for two-axle vehicles. 7. The drive wheel rear two-axle vehicle according to claim 5, wherein the power transmission shaft clutch is a dog clutch in which a sleeve meshes with another clutch gear of the inter-differential. Drive system. 8. A dog clutch, the input shaft clutch of which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential,
And that power transmission shaft
6. The drive system used in a two-wheel drive rear axle as recited in claim 5, wherein the clutch is a dog clutch in which a sleeve engages another clutch gear of the interferential. 9. A front differential, which is coupled to left and right drive shafts of a rear front axle to transmit power to a front drive pinion, and a rear differential, which is coupled to left and right drive shafts of a rear and rear axle.・ Rear differential transmitted to the pinion, input shaft, power transmission shaft, drive rotatably supported on the input shaft
A gear, an inter-differential coupled to its input shaft and power transmission shaft, an iptt shaft clutch that connects and disconnects its drive gear and inter-differential to its input shaft, and its input shaft and inter-differential power·
An interaxle differential assembled with a power transmission shaft clutch that connects and disconnects to the transmission shaft, and a free wheel clutch that then connects and disconnects one of the left and right drive shafts of the front axle to its front differential, and its input. Two rear drive wheel axles, including an interaxle differential shift unit that operates the shaft clutch and the power transmission shaft clutch, and a free wheel clutch shift unit that operates the free wheel clutch Drive system used in cars. 10. The rear drive wheel of claim 9, wherein the input shaft clutch is a dog clutch which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential. Drive system used for two-axle vehicles. 11. A drive axle rear twin wheel vehicle according to claim 9, wherein the power transmission shaft clutch is a dog clutch where the sleeve meshes with other clutch gears of the interferential. Drive system. 12. A dog clutch, the input shaft clutch of which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential,
And that power transmission shaft
10. The drive system used in a rear drive wheel axle according to claim 9, wherein the clutch is a dog clutch in which a sleeve meshes with other clutch gears of the interferential. 13. The free wheel clutch comprises:
The drive system used in a two-axle rear drive wheel according to claim 9, which is a dog clutch in which a gear spline of one of the drive shafts is engaged with a clutch gear of the front differential by a sleeve. 14. A dog clutch, the input shaft clutch of which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential,
10. The rear drive wheel clutch according to claim 9, wherein the free wheel clutch is a dog clutch in which a gear spline of the one drive shaft is engaged with a clutch gear of the front differential with a sleeve. Drive system used for axles. 15. The power transmission shaft clutch is a dog clutch where the sleeve meshes with another clutch gear of the interferential, and the free wheel clutch is the sleeve. The drive system used for a two-axle rear-wheel-drive vehicle according to claim 9, which is a dog clutch in which a gear spline of one drive shaft is engaged with a clutch gear of its front differential. 16. A dog clutch, the input shaft clutch of which is engaged by a sleeve with a gear spline of the drive gear and a clutch gear of the inter-differential,
The power transmission shaft clutch is a dog clutch where the sleeve meshes with the other clutch gears of the differential, and the free wheel clutch is the sleeve of one of the drive shafts. 10. A dog clutch for engaging a gear spline with a clutch gear of its front differential.
The drive system according to. 17. An input shaft, a power transmission shaft coupled to the input shaft, a drive gear rotatably supported on the input shaft, and the drive gear connected to the input gear. An interaxle differential used for a two-wheel vehicle with rear drive wheels that includes an input shaft clutch that connects and disconnects with the shaft. 18. The interaxle of claim 17, wherein the input shaft clutch is a dog clutch in which a sleeve engages a gear spline of the drive gear with a clutch gear of the input shaft.・ Differential. 19. A front differential, which is coupled to left and right drive shafts of a rear front axle to transmit power to a front drive pinion, and a rear drive, which is coupled to left and right drive shafts of a rear and rear axle. Rear differential transmitted to the pinion, an input shaft, a power transmission shaft coupled to the input shaft, a drive gear rotatably supported on the input shaft, and the drive gear Used for a rear two-wheel drive wheel that includes an interaxle differential that is assembled with an input shaft clutch that connects and disconnects the input shaft, and an interaxle differential shift unit that operates the input shaft clutch. Driven Dynamic system. 20. The drive wheel of claim 20, wherein the input shaft clutch is a dog clutch in which a sleeve engages a gear spline of the drive gear with a clutch gear of the input shaft. Drive system used for rear two-axle vehicles. 21. A front differential, which is connected to left and right drive shafts of a rear front axle to transmit power to a front drive pinion, and a rear drive, which is connected to left and right drive shafts of a rear and rear axle. Rear differential transmitted to the pinion, an input shaft, a power transmission shaft coupled to the input shaft, a drive gear rotatably supported on the input shaft, and the drive gear , An interaxle differential that is assembled with an input shaft clutch that connects and disconnects the input shaft, and a free wheel clutch that connects and disconnects one of the left and right drive shafts of the front axle to the front differential, and its input shaft· Interaxle differential shift unit that operates the clutch and its free wheel
A drive system used in a two-axle rear drive wheel including a clutch shift unit. 22. The drive wheel of claim 21, wherein the input shaft clutch is a dog clutch in which a sleeve engages a gear spline of the drive gear with a clutch gear of the input shaft. Drive system used for rear two-axle vehicles. 23. The free wheel clutch comprises:
22. The drive system used in a two-wheel drive rear axle according to claim 21, which is a dog clutch in which a sleeve engages a gear spline of one of the drive shafts with a clutch gear of the front differential. 24. The input shaft clutch is a dog clutch, wherein a sleeve engages a gear spline of the drive gear with a clutch gear of the input shaft, and the freewheel clutch. 22. The drive system used in a two-wheel-drive rear-axle vehicle as set forth in claim 21, wherein is a dog clutch in which a sleeve engages a gear spline of one of the drive shafts with a clutch gear of the front differential. .