JPH03239631A - Hybrid structure of tractor - Google Patents

Abstract

PURPOSE:To hybridize without significantly changing the structure of an existing engine driving system by equipping the rear part of a vehicle with an electric motor and a battery, and by providing an electric-motor driven output shaft with a motor-side pinion gear, so that both the motor-side pinion gear and an engine-side pinion gear are together engaged with a final gear. CONSTITUTION:When rear wheel 3 are driven by making a power source of an engine 4, the clutches 11a, 11b of electric motors are cut off. And, the output of the engine 4 is transmitted to the rear wheels 3 so as to be driven via a transmission 5, propeller shaft 6, a pinion gear 7, a final gear 8, and a rear wheel driving shaft 17. When the rear wheels 3 are driven by making a power source of electric motors 12a, 12b, first, the transmission 5 is shifted to the neutral position, and the electric motors 12a, 12b are connected to a reduction gear 10 by means of the clutches 11a, 11b. Then, by making the power supply of a battery 13, the electric motors are controlled by a controller 14, and the rear wheels 3 are driven via a pinion gear 9, the final gear 8, and the shaft 17.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a hybrid structure suitable for a towing vehicle.

2. Description of the Related Art A hybrid vehicle is known that is equipped with an engine and an electric motor and is driven by the engine or the electric motor (Japanese Patent Laid-Open No. 1-95944).

As shown in FIG. 5, this hybrid vehicle includes an engine 30, an electric motor 31, and a transmission 32 disposed at the front of the vehicle, and these are drivingly connected by a chain 33. The rear wheels 34 are driven by the engine 30 or the electric motor 31 by being switched by a clutch (not shown).

By the way, as shown in Japanese Patent Application Laid-open No. 62-101585, for example, there is a known towing vehicle in which an engine is placed at the front of the vehicle and the rear wheels are driven by this engine, but this towing vehicle is stored in a basement. When used indoors, the effect of exhaust gas becomes a problem. to solve this problem,
Although it is possible to use an electric vehicle as a tow vehicle, it is not a good idea to use an electric vehicle as a tow vehicle because the battery capacity of an electric vehicle is small and the number of times that it must be charged is accordingly large.

Therefore, if the structure of the hybrid vehicle described above could be applied to the towing vehicle, and it would be driven by the engine outdoors and driven by the electric motor indoors, the effects of exhaust gas and battery capacity mentioned above could be reduced. It solves many problems and is very convenient.

Problems to be Solved by the Invention However, when applying the structure of the hybrid vehicle shown in FIG. The driving connection must be made using a chain or the like, which is disadvantageous in that the structure of the existing towing vehicle engine drive system must be significantly changed.

Therefore, there has been a desire for a hybrid structure that can hybridize a tow vehicle without significantly changing the existing tow vehicle engine drive system structure.

Means for Solving the Problems Therefore, the present invention provides a hybrid structure for a towing vehicle, in which an engine disposed at the front of the vehicle, an engine-side pinion gear provided on the output shaft of the engine drive system, and a drive coupling to the rear wheel drive shaft. a motor-side final gear, an electric motor and a battery disposed at the rear of the vehicle, a motor-side pinion gear is provided on the output shaft of the electric motor drive system, and both the motor-side pinion gear and the engine-side pinion gear are meshed with the final gear; Alternatively, the motor drive system output shaft is drive-coupled to the engine drive system output shaft, so that the rear wheels are driven by the engine or the electric motor.

Function: There is a space at the rear of the existing towing vehicle, and the electric motor is placed in this space. Then, a motor-side pinion gear is provided on the output shaft of the motor drive system, and this pinion gear is meshed with the existing final gear, or the output shaft of the motor drive system is drive-coupled with the output shaft of the existing engine drive system. , hybridization of towing vehicles can be realized without major changes to the existing towing vehicle engine drive system structure.

Embodiment FIGS. 1 and 2 are a partially cutaway side view and a partially cutaway top view of a Honnet type towing vehicle I which is an embodiment of the present invention.

In the figure, 2 is a front wheel, 3 is a rear wheel, and 4 is an engine, and this engine 4 is arranged at the front of the towing vehicle I. Further, 5 is a transmission, 6 is a propeller shaft which is the output shaft of the engine drive system, and 7 is a pinion gear on the engine side, and the output of the engine 4 is transmitted through the transmission 5 and the propeller shaft 6 to the pinion gear 7.
transmitted to. This pinion gear 7 is meshed with a final gear 8 which is drive-coupled to the rear wheel drive shaft 17 via a differential gear (not shown), and as the final gear 8 is driven by the pinion gear 7, the rear wheels 3 are rotated. Driven.

In addition, the engine 4 explained above. transmission 5
．． The arrangement of the propeller shaft 6, pinion gear 7°, and final gear 8, that is, the arrangement of the engine drive system, is the same as that of existing towing vehicles, and the electric motor drive system described below is added to this engine drive system. .

That is, 12a and 12b are electric motors, and these electric motors 12a and 12b are arranged horizontally and parallel to each other in a space at the rear of the vehicle. Also, Il
a and llb are clutches and IO beam reduction gears, and the electric motors 12a and 12b are drive-coupled to one output shaft I8, which is the output shaft of the motor drive system, by a reduction gear IO. A pinion gear 9 on the motor side is attached to the output shaft 18, and the pinion gear 9 is meshed with the final gear 8. Also, the electric motor 12a,! 2b, clutches 11a, llb, and a motor drive system housing 21 for the reduction gear 10 are integrally fixed to a rear wheel axle housing 22.

Further, the motor drive system housing 21 is also attached to the frame of the vehicle via a ball joint 15 and a slide mount 16. The ball joint 15 and slide mount 16 are movable vertically and longitudinally with respect to the motor drive system or the vehicle body. Further, 13 is a battery for electric motors 12a and 12b;
14 is a controller, and these battery 13 and controller 14 are arranged above the final gear 8 and electric motors 12a and 12b at the rear of the vehicle.

Now, when driving the rear wheels 3 using the engine 4 as a power source in the towing vehicle l having the above-mentioned configuration, the clutches lla and llb of the electric motor are disengaged. Then, the output of engine 4 is transmitted to transmission 5. propeller shaft 6
, pinion gear 7° final gear 8. Rear wheel drive shaft 17
The signal is transmitted to the rear wheels 3 via the rear wheels 3, which are then driven.

In addition, when driving the rear wheels 3 using the electric motors 12a, 12b as power sources, the transmission 5 is first set to the neutral position, and the clutches lla, llb
connects the electric motors 12a, 12b to the reduction gear lO. Using the battery 13 as a power source, the controller 14 controls the rotation of the electric motors 12a, 12b, and the pinion gear 9. Final gear 8. Rear wheel drive shaft 17
The rear wheels 3 are driven via.

In this way, according to the embodiment described above, an electric motor can be added to the existing tow vehicle to create a hybrid structure without changing the engine drive system structure of the tow vehicle.

Further, since the driving force is directly transmitted from the electric motors 41112a and 12b to the final gear, the transmission efficiency is good.

Furthermore, since the electric motors 12a, 12b and battery 13 are arranged at the rear of the vehicle, the load shared by the rear wheels, which are the driving wheels, increases, and the traction ability can be improved.

In addition, since the electric motors are two electric motors 12a and 12b arranged horizontally and parallel to each other, the height dimension of the electric motor is smaller than when a single large electric motor is used, and the rear visibility of the vehicle is impaired. Hybridization is possible without any problems. Similarly, since the longitudinal dimension is smaller than that of a single large electric motor, there is no need to increase the overall length of the vehicle, and hybridization can be achieved while maintaining tight turning performance. moreover,
Since the center of gravity of the electric motor is lower than that of a single large electric motor, the stability of the vehicle is better than that of a single large electric motor.

Further, since the rear wheel axle housing 22 and the motor drive system housing 21 are integrally connected and fixed, the motor drive system and the rear wheel axle can be made compact. Furthermore, since the housing 21 of the electric motor drive system is attached to the vehicle frame via the ball joint 15 and slide mount 16, the electric motors 12a, 12b can absorb the relative movement of the rear wheel axle with respect to the vehicle body during the vertical stroke of the suspension. can be held more stably.

In addition, by arranging the electric motors 12a and 12b so as to be substantially parallel to the running surface and arranging the electric motor drive system at a lower position, the height direction dimension at the rear of the vehicle can be further reduced, and rearward visibility can be improved. Furthermore, the durability of the electric motor can be improved due to the cooling effect of the running wind.

In the above embodiment, the housing 21 of the electric motor drive system is fixed integrally with the axle housing 22 of the rear wheel, but the housing of the electric motor drive system is fixed to the frame of the vehicle, for example, the propeller shaft and the vehicle The output shaft 18 and the pinion gear 9 may be connected through a joint that absorbs relative movement between the rear wheel axle and the rear wheel axle. In this way, the motor drive system can be more securely fixed, and reliability can be further improved.

3 and 4 are a partially cutaway side view and a partially cutaway top view of a bonnet type towing vehicle 1 which is another embodiment of the present invention, and parts equivalent to the example in FIG. A code is attached.

In the figure, the propeller shaft 6 is coupled to a pinion gear 7 via a transfer 19.

Further, the housing 21 of the electric motor drive system is fixed to the frame of the vehicle so as to be disposed in a space at the rear of the vehicle, and the output shaft 18 is coupled to the pinion gear 7 via a propeller shaft 20 and a transfer 19.

Note that the configuration other than the above-mentioned configuration is the same as in the example 5 in FIG. 1.

In the towing vehicle I configured as described above, switching between using the engine 4 as the power source and using the electric motors 12a and 12b as the power source is the same as in the example in FIG. 1. However, the output of the engine 4 is transmitted from the propeller shaft 6 to the pinion gear 7 via the transfer 19, and the electric motor 1
The outputs of 2a and 12b are output from the propeller shaft 20. The signal is transmitted to pinion gear 7 via transfer 19 .

According to the example in Fig. 3 mentioned above, it is possible to change the structure of the engine drive system of the existing towing vehicle by only partially changing the structure, that is, transfer 1.
By simply adding 9, an electric motor can be added to create a hybrid structure without major changes.

Also, like the example in FIG. 1, electric motors 12a and 12b.

Since the battery 13 is disposed at the rear of the vehicle, the load shared by the rear wheels increases and the traction ability can be improved.

Furthermore, since the electric motors are two electric motors 12a and 12b arranged horizontally and parallel to each other, the height dimension of the electric motor is smaller than when a single large electric motor is used, which impairs rear visibility of the vehicle. Hybridization is possible without any problems. Similarly, there is no need to increase the overall length of the vehicle, and hybridization can be achieved while maintaining tight turning characteristics. Also,
Since the center of gravity of the electric motor is lower than that of a single large electric motor, the stability of the vehicle is better than that of a single large electric motor.

In addition, by arranging the electric motors 12a and 12b so as to be substantially parallel to the running surface and arranging the electric motor drive system at a lower position, the height direction dimension at the rear of the vehicle can be further reduced, and rearward visibility can be improved. Furthermore, the durability of the electric motor can be improved due to the cooling effect of the running wind.

In the example shown in FIG. 3, the housing of the electric motor drive system is fixed to the frame of the vehicle, but the housing 21 of the electric motor drive system may also be fixed integrally with the axle housing 22 of the rear wheel. good. Furthermore, when the housing 21 of the electric motor drive system is fixed integrally with the axle housing 22 of the rear wheel, the housing of the electric motor drive system is fixed to the pole joint 1 as shown in the example in FIG.
5 and a slide mount 16, it may be attached to the frame of the vehicle. In this way, the electric motors 12a, 12b can be held more stably.

Effects of the invention As described above, according to the invention related to claim 1 or 2,
The vehicle includes an engine located at the front of the vehicle, an engine-side pinion gear provided on the output shaft of the engine drive system, a final gear drive-coupled to the rear wheel drive shaft, and an electric motor and battery located at the rear of the vehicle, Either a motor-side pinion gear is provided on the motor drive system output shaft, and the motor-side pinion gear and the engine-side pinion gear are both meshed with the final gear, or the motor drive system output shaft is drive-coupled to the engine drive system output shaft, and the engine Alternatively, since the rear wheels are driven by an electric motor, it is possible to realize a hybrid towing vehicle without significantly changing the existing towing vehicle engine drive system structure.

Furthermore, since the electric motor and its battery are disposed at the rear of the vehicle, the load shared by the rear wheels, which are the driving wheels, increases and the traction ability can be improved.

Furthermore, according to the invention related to claim 3, since the electric motors are two electric motors arranged parallel to each other, the height dimension of the electric motors is smaller than when using a single large electric motor, and the rearward visibility of the vehicle is improved. can be hybridized without harming the Similarly, since the longitudinal dimension is smaller than that of a single large electric motor, there is no need to increase the overall length of the vehicle, and hybridization can be achieved while maintaining tight turning performance. Furthermore, since the center of gravity of the electric motor is lower than that of a single large electric motor, the stability of the vehicle is improved.

Further, according to the invention related to claim 4 or 5, since the housing of the electric motor drive system is fixed to the vehicle body, the electric motor drive system can be more securely fixed and reliability can be improved.

Furthermore, according to the invention related to claim 6, since the housing of the electric motor drive system and the rear wheel axle housing are integrally coupled, the electric motor drive system and the rear wheel axle can be made compact.

Further, according to the invention related to claim 7, since the electric motor is arranged so as to be substantially parallel to the running surface, the electric motor drive system can be arranged at a lower position, and rearward visibility can be further improved. , the durability of the electric motor can be improved due to the cooling effect of the running wind.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of one embodiment of the present invention, FIG. 2 is a partially cutaway top view of the example shown in FIG. 1, and FIG. 3 is a partially cutaway side view of another embodiment of the present invention. FIG. 4 is a partially cutaway top view of the example shown in FIG. 3, and FIG. 5 is an explanatory diagram of a conventional hybrid vehicle. 1... Bonnet type towing vehicle, 3... Rear wheel, 4...
...Engine, 5...Transmission, 6.20
... Professional gear shaft, 7... Engine side pinion gear, 9... Motor side pinion gear, 8... Final gear, 10... Redakun Yongya, lla,,l
lb...Clutch, 12a, 12b...Electric motor, 1
3...Battery, 15...Paul Schiffind, 16.
...Slide mount, 18...Electric motor drive system output shaft, 19...Transfer, 21...Electric motor drive system housing, 22...Rear wheel axle housing.

Claims (7)

[Claims] (1) An engine located at the front of the vehicle, an engine-side pinion gear provided on the output shaft of the engine drive system, a final gear drive-coupled to the rear wheel drive shaft, and an electric motor and battery located at the rear of the vehicle. , and a motor-side pinion gear provided on the output shaft of the motor drive system, the motor-side pinion gear and the engine-side pinion gear are both meshed with the final gear, and the rear wheels are driven by the engine or the electric motor. The hybrid structure of the towing vehicle is a feature. (2) An engine located at the front of the vehicle, an engine drive system output shaft that is drive-coupled with the rear wheel drive shaft, and an electric motor and battery located at the rear of the vehicle, and the output shaft of the motor drive system is connected to the engine. A hybrid structure for a towing vehicle, characterized in that the rear wheels are driven by an engine or an electric motor, which is drive-coupled to a drive system output shaft. (3) In the hybrid structure of a towing vehicle according to claim 1 or 2, the electric motors include two electric motors arranged horizontally side by side and drivingly coupled to one output shaft.
A hybrid structure of a towing vehicle characterized by comprising two electric motors. (4) In the hybrid structure of a towing vehicle according to claim 1, the electric motor is composed of two electric motors arranged horizontally side by side and drive-coupled to one output shaft, and the electric motor is a motor drive system. A hybrid structure for a towing vehicle, characterized in that a housing is fixed to a vehicle body, and a motor drive system output shaft is drive-coupled to a pinion gear on the motor side via a joint that absorbs relative movement between the vehicle body and a rear wheel axle. (5) In the hybrid structure of a towing vehicle according to claim 2, the electric motor is composed of two electric motors arranged horizontally side by side and drivingly connected to one output shaft, and the motor drive system housing A hybrid structure for a towing vehicle, characterized in that the motor drive system output shaft is fixed to the vehicle body, and the motor drive system output shaft is drive-coupled to the engine drive system output shaft via a joint that absorbs relative movement between the vehicle body and the rear axle. (6) In the hybrid structure of a towing vehicle according to claim 3, the axle housing of the rear wheel and the housing of the electric motor drive system are integrally connected, and the electric motor drive system housing is arranged vertically and vertically with respect to the vehicle body. A hybrid structure for a towing vehicle characterized by being attached to the vehicle body so that it can move relative to each other in the front and rear directions. (7) The hybrid structure of a towing vehicle according to claim 4, 5, or 6, characterized in that the electric motor is disposed on the vehicle rear side of the final gear, substantially parallel to the running surface. Hybrid structure of towing vehicle.