JPH0542833A - Driving gear of retarder-equipped vehicle - Google Patents

Abstract

PURPOSE:To constantly secure good electrical and magnetic characteristics of an electrically-operated inductor disposed in proximity to the wet clutch of a vehicle driving system by shielding the inductor with precision from oil coming from the clutch. CONSTITUTION:A flywheel 8 is connected to the crankshaft 5 of an engine 1 via a connecting shaft 6 within hermetically sealed flywheel housing 2, 3 and a wet clutch 20 equipped with an oil circulating device 35 is mounted to the flywheel 8 and a partition wall 15 is sealed to the outside of the flywheel 8 to form an inductor storage room 17 on the side of the connecting shaft and an inductor 51 is mounted in the inductor storage room 17. Oil fed to the wet clutch 20 and splashing is completely blocked by the flywheel 8 and the partition wall 15 so as to always keep the inductor storage room 17 in the dry state and thus the inductor 51 is constantly held in its electrically and magnetically normal operating state without being affected by the oil or the like at all.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle, such as an automobile, having a retarder for converting mechanical energy of a drive system into electric energy to regenerate the electric energy, and electrically braking and auxiliary accelerating the engine crankshaft. The present invention relates to a drive device when an induction machine is mounted on a flywheel and a wet clutch, and more particularly to a winding structure of an induction machine and a shield structure for oil on a clutch side of an iron core.

[0002]

2. Description of the Related Art Recently, as a vehicle with a retarder, the applicant of the present invention installed an induction machine on a flywheel having a large inertia mass and an outer diameter on the engine side of a transmission in a drive system from the engine. A retarder device that is controlled dynamically has been proposed. This retarder device operates an induction machine as a generator at the time of deceleration to electrically brake, and in particular compensates for a decrease in engine braking effect due to downsizing of an engine of a large vehicle. At this time, the induction machine converts mechanical energy into electric energy. It changes and regenerates into a battery. In addition, at the time of starting and accelerating, the aim is to reduce the fuel consumption and exhaust gas by operating the induction machine as a motor driven by a battery power source for auxiliary acceleration.

Further, in a large vehicle, a double clutch is operated during a gear shift operation, and the frequency of clutch engagement / disengagement is very high. Therefore, the amount of heat generated by the clutch is large. Therefore,
In order to deal with such a clutch, a friction clutch is combined with an oil circulation device to form a wet clutch.
It is known that oil is supplied to the clutch to facilitate the connection and disconnection of the frequently used clutch and to effectively cool the heat generation of the clutch.

Therefore, in order to further improve various characteristics of the vehicle, it is attempted to further combine the induction machine of the retarder device in this position with the wet clutch mounted on the flywheel of the drive system. Has been.

[0005]

By the way, when the electrically driven induction machine is arranged close to the wet clutch in the vehicle drive system, it is inevitable that the stator side and the rotor side of the induction machine are connected to the clutch side. The splashed oil will cause problems such as electric leakage. In addition, it is essential for the induction machine to have the fixed side iron core and the fixed side iron core facing each other with a predetermined gap to maintain good magnetic circuit characteristics.If oil enters this gap, its magnetic characteristics will be impaired. It causes such problems as For this reason, it is necessary to shield the stator and rotor of the induction machine so as to prevent oil from adhering to the stator and rotor, and to prevent the oil from entering the gap between the two iron cores.

The present invention has been made in view of this point, and in an arrangement in which an electrically operated induction machine is arranged close to a wet clutch of a vehicle drive system, the induction machine side is suitable for the oil on the clutch side. The purpose is to ensure that the electrical and magnetic characteristics are always excellent by properly shielding.

[0007]

To achieve this object, the present invention provides a wet clutch in which a flywheel on the engine side is housed inside a closed flywheel housing, and the flywheel is equipped with an oil circulation device. In the drive system that is installed and the induction machine of the retarder device is installed inside the flywheel housing, the flywheel is connected to the crankshaft of the engine through the connecting shaft, and the flywheel housing and the flywheel inside the flywheel housing are connected. A partition wall equipped with an oil seal is provided between the partition wall and the outer circumference, and the partition wall and the flywheel divide it to form an induction machine accommodating chamber on the side of the connecting shaft, and the induction machine is fixed inside this induction machine accommodating chamber. The child part is fixedly attached to the flywheel housing side, and the rotor part is fixedly attached to the connecting shaft side.

[0008]

According to the structure of the present invention described above, the oil is scattered inside the flywheel housing by the rotation of the wet clutch supplied by the oil circulation device, but the oil is completely blocked by the partition wall and the flywheel. , The induction motor housing next to the flywheel is always kept dry. As a result, the induction machine installed in the induction machine accommodating chamber is always electrically and magnetically maintained in a normal operating state without being affected by oil etc., and the drive system is electrically braked and assisted while the vehicle is running. It will be possible to operate like.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The drive system of the vehicle with the retarder will be described with reference to FIG. Reference numeral 1 is an engine, 2 and 3 are flywheel housings which are divided into two in the axial direction, and 4 is a transmission. Inside the flywheel housings 2 and 3, a connecting shaft 6 is integrally connected to an end of a crank shaft 5 of the engine 1 by a bolt 7, and an induction machine 51 of a retarder device 50 is mounted on the connecting shaft 6. Further, a flywheel 8 is integrally connected to an end of the connecting shaft 6 by a bolt 9, and an input shaft 10 of the transmission 4 is coaxially arranged on the flywheel 6 with a tip end supported by a bearing 11. A wet clutch 20 is provided between the flywheel 8 and the input shaft 10 with an oil circulation device 35.

The wet type clutch 20 is constituted by supplying oil to a friction type clutch, and a pressure is applied to a side surface of the flywheel 8 via a lining 22 of a clutch disc 21 which is splined to the transmission input shaft 10. The plates 23 are arranged to face each other. Clutch cover 24
Bolts 2 to the drum portion 8a on the outer circumference of the flywheel 8
It is concluded by 5. A spring 26 of a clutch cover 24 is biased to the pressure plate 23 so as to press the lining 22 of the clutch disc 21 against the flywheel 8 and is further supported by a pin 27 of the clutch cover 24 on the pressure plate 23. One end of the release lever 28 is connected so as to retract the pressure plate 23 by operating the lever. Also, input shaft 1
A cylindrical holder 29 is installed around 0, and a slider 31 having a release bearing 30 is mounted on the holder 29.
Is movably fitted, and the release fork 32 is engaged with the slider 31 so as to move by its rotation.

The oil circulation device 35 is provided with the groove 2 of the holder 29.
An oil passage 10a is formed in the bearing side end portion of the input shaft 10 from 9a in the inner center of the input shaft 10, and the supply pipe 36 is communicated with the holder groove 29a. In the vicinity of the clutch disc 21 spline-fitted in the input shaft 10, oil holes 10b and 10c for lubrication and lining oil supply are provided so as to branch from the oil passage 10a.
It is possible to supply oil to the bearing 11, the fitting portion of the clutch disc 21, and the lining 22 by a and the oil holes 10b and 10c, and the drum portion 8a of the flywheel 8 is provided with the oil discharge hole 8b. . An oil pump 37 is fixed to the inside of the wall portion 3a of the rear flywheel housing 3, and a drive gear 39 of the drive shaft 38 meshes with a gear 40 fixed to the inner peripheral portion of the clutch cover 24. The pump is always driven by the power when the engine is operating. Then, a return pipe 42 from an oil pan 41 provided in the lower portion of the rear flywheel housing 3 communicates with the suction side of the oil pump 37 to pump up oil, and returns it to an oil reservoir (not shown) to cool it. The supply pipe 36 is configured to naturally flow down and circulate oil.

On the other hand, inside the flywheel housings 2 and 3, the wet clutch 20 is further housed and installed inside the flywheel 8, so that the partition wall 15 is installed at the position of the flywheel 8. The partition wall 15 is shown in FIG.
As shown in FIG. 6, the bent wheel is appropriately bent according to the arrangement state of the flywheel 8 and the induction machine 51 to form a narrow annular shape. The partition wall 15 is fixed with the outer peripheral portion 15a sandwiched between the joint portions of both flywheel housings 2 and 3, and the inner peripheral boss portion 15b.
Is equipped with a contact type oil seal 16 and slidably contacts the outer peripheral surface 8b of the flywheel 8. And this partition wall 15
And the front surface 8c of the flywheel 8 divides the inside of the flywheel housings 2 and 3 to form an induction machine housing chamber 17 that is adjacent to the front of the flywheel 8 and blocks oil. The machine 51 is housed and installed. A seal 18 is installed between the flywheel housing 2 and the boss portions 2a, 6a of the connecting shaft 6 so as to prevent the intrusion of dust and the like, and the heat generated by the induction machine 51 is radiated to the flywheel housing 2. A heat radiation fin 19 is provided.

The induction machine 51 has a stator portion 51 composed of a stator core 53 fitted on the inner periphery of the stator ring 52 and a stator winding 54 arranged on the circumference of the stator core 53.
a, the rotor core 5 fitted around the outer circumference of the rotor ring 55
6. It has a rotor portion 51b composed of a squirrel cage winding 58 arranged on the circumference of the rotor iron core 56 using a retaining ring 57. Here, when the mounting position of the induction machine 51 is farther from the center, the induction machine 51 can operate electrically efficiently and the interference with the flywheel 8 is reduced. Therefore, the front portion 3b of the front flywheel housing 2 and the rear flywheel housing 3 are formed to have a large diameter, and the stator portion 51a is formed inside the flywheel housings 2 and 3.
However, the stator ring 52 is sandwiched between the two joints and fastened together by the bolts 59 to be fixed. A disc-shaped disc 60 is fastened to the flange 6b of the connecting shaft 6 on the center side with bolts 61.
The rotor portion 51b is positioned at 0a and fixed by a bolt 62. In this case, the stator portion 51a and the rotor portion 51b
Is disposed outside the wet clutch 20 so as to slightly reduce the space in the axial force direction so that the iron cores 53 and 56 of both are aligned in the axial direction and face each other in the radial direction with a predetermined gap. It is arranged. The stator winding 54 of the stator portion 51 a is connected to the electric control device 63.

Next, the operation of this embodiment will be described. First, when the engine 1 is in operation, the connecting shaft 6 and the flywheel 8 are rotated by the crankshaft 5 and the rotational fluctuation thereof is reduced. At this time, the rotor portion 51b of the induction machine 51 and the wet clutch 20 rotate together. Therefore, the lining 22 of the clutch disc 21 is replaced by the pressure plate 23,
When the clutch that is in pressure contact with the flywheel 8 by the spring 26 is engaged, the engine power is the wet clutch 20.
It is input to the transmission 4 via and the power is further transmitted to the wheels to drive the vehicle. On the other hand, when the clutch pedal is depressed during gear shifting, the slider 31 moves forward by the release fork 32, and the release bearing 30 rotates the release lever 28, whereby the pressure plate 23 retracts and the clutch is disengaged. When the depression of the clutch pedal is released, the slider 31 moves backward and the spring 26 again causes the pressure plate 23 to press-contact the lining 22 to engage the clutch.

At this time, in the oil circulation device 35, the clutch cover 24 of the wet clutch 20 and the gear 3 are provided.
The oil pump 37 is constantly pumped by the engine power via 9 and 40 to circulate the oil. Then, the oil that naturally flows down through the supply pipe 36 flows into the oil passage 10a and the oil hole 10b of the input shaft 10, and the bearing 11 and the spline fitting portion of the clutch disc 21 are lubricated. Further, this oil is radially injected to the outside of the input shaft 10 through the oil hole 10c and is supplied to the lining 22 of the wet clutch 20. Therefore, when the above-mentioned clutch is disengaged, oil enters between the flywheel 8, the lining 22, and the pressure plate 23,
With this oil, the clutch is connected smoothly. Further, the heat generated by slipping in the half-clutch state of the clutch connection is quickly and effectively cooled by the oil. On the other hand, the oil supplied to the wet clutch 20 inside the flywheel 8 scatters via the discharge hole 8b, and the scattered oil lubricates each part of the clutch.

In the inside of the flywheel housings 2 and 3, the flywheel 8 and the partition wall 15 and the oil seal 16 installed outside the flywheel 8 completely shut off splash oil on the wet clutch side. For this reason,
The induction machine accommodating chamber 17 adjacent to the flywheel 8 is always kept dry. Therefore, the stator portion 51a of the induction machine 51 mounted in the induction machine housing chamber 17 is prevented from adhering dust and oil, and the rotor section 51b is also rotated in a clean state by the connecting shaft 6 and the disk 60. , A proper gap is secured between them. In this way, the induction machine 51 can operate normally without being electrically or magnetically affected by the oil.

Therefore, when the electric control device 63 applies a rotating magnetic field delayed from the shaft rotation speed to the stator portion 51a of the induction machine 51 when the vehicle is decelerated and operates as a generator, the rotor portion 51b is rotated. A decelerating electromagnetic force is exerted, and thus electric braking is performed to increase the engine braking effect. At this time, the induction machine 51 converts the mechanical energy of the drive system into electric energy and regenerates it in the battery. Then, at the time of starting and accelerating, this battery power is applied to the stator portion 51a by the electric control device 63, and at the same time, when a rotating magnetic field faster than the shaft rotation speed is applied to operate as an electric motor, the drive system is transmitted via the rotor portion 51b. Since the auxiliary driving force is applied, the output torque characteristic is improved in this way.

Another embodiment of the present invention will be described with reference to FIG. In this embodiment, the seal mounting portion of the partition wall 15 is far away from the center, and the seal sliding distance becomes very large even at the same number of rotations. Further, in the induction machine accommodating chamber 17, cooling air is introduced to enhance the cooling effect of the induction machine rotor portion 51b having a large capacity. For this reason, it is considered that the inside becomes a high-pressure atmosphere. Therefore, the inner peripheral boss portion 15b of the partition wall 15 and the outer peripheral surface 8 of the flywheel 8 are
A non-contact type labyrinth seal 64 is provided between and b. Therefore, in this embodiment, the large-diameter outer peripheral surface 8b of the flywheel 8 and the partition wall 15 are in a non-contact state with less wear and the like at the labyrinth seal 64, and the sealing function of the labyrinth seal 64 and the induction machine housing chamber are always maintained. The high-pressure atmosphere 17 surely prevents oil from entering. In addition,
In FIG. 1, X is a breather for the wet clutch chamber, Y is a relief valve that keeps the induction machine storage room 17 always under a constant pressure, and Z is a cooling air inlet.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto.

[0020]

As described above, according to the present invention,
In a drive system of a vehicle with a retarder, a flywheel housing is partitioned by a method in which a wet clutch is attached to the flywheel inside a sealed flywheel housing and an induction machine of a retarder device is attached adjacent to the wet clutch. The induction machine can be always operated normally without being affected by oil, etc., because it is configured to be installed with the induction machine accommodating chamber that is partitioned by the wall and completely cut off the oil. become. Since the partition wall is installed between the flywheel housing and the outer peripheral portion of the flywheel, the partition wall is formed in a narrow annular shape to facilitate processing and assembly. Since the one using the labyrinth seal of the second embodiment is non-contact, the durability is increased. Since the induction machine is configured separately for the flywheel and the wet clutch, they can operate optimally and have good assembling and maintainability. Since the induction machine is mounted far away in the radial direction, it can operate electrically efficiently.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a drive device for a vehicle with a retarder according to the present invention.

FIG. 2 is a cut perspective view of a partition wall.

FIG. 3 is a sectional view of an essential part of another embodiment of the present invention.

[Explanation of reference numerals] 2,3 Flywheel housing 5 Crankshaft 6 Connection shaft 8 Flywheel 8b Outer peripheral surface 15 Partition wall 16 Contact oil seal 20 Wet clutch 35 Oil circulating device 50 Retarder device 51 Induction machine 51a Stator part 51b Rotation Child 64 Labyrinth seal

Claims (3)

[Claims] 1. A closed flywheel housing accommodates a flywheel on the engine side, a wet clutch equipped with an oil circulation device is mounted on the flywheel, and an induction machine of a retarder device is provided inside the flywheel housing. In the drive system to be installed, the flywheel is connected to the crankshaft of the engine via the connecting shaft, and a partition wall with an oil seal is provided inside the flywheel housing between the flywheel housing and the outer periphery of the flywheel. , The partition wall and the flywheel are divided to form an induction machine accommodating chamber on the side of the connecting shaft, the induction machine is fixed in the induction machine accommodating chamber, the stator is fixed to the flywheel housing, and the rotor is fixed. A drive device for a vehicle with a retarder, which is fixedly mounted on a connecting shaft side. 2. The drive device for a retarder-equipped vehicle according to claim 1, wherein the oil seal is a contact type seal or a non-contact type labyrinth seal for the outer peripheral portion of the flywheel. 3. The oil circulation device, which is formed inside at least an oil pump driven by a flywheel and a transmission input shaft, lubricates a bearing and a clutch disc fitting portion at an end portion of the oil pump, and a clutch lining portion. The drive device for a vehicle with a retarder according to claim 1, further comprising an oil passage and an oil hole for refueling the vehicle.