JPH0524448A - Drive device of vehicle with retarder - Google Patents

Abstract

PURPOSE:To always maintain electric and magnetic properties of an induction machine by providing a shielding means on the induction machine so that is stator is covered and a gap between both iron cores at the stator portion and a rotor portion can be sealed to shield the induction machine side properly to the oil on the clutch side. CONSTITUTION:An electrically operated induction machine 41 is positioned close to an wet-type clutch 10 in a vehicle drive system. A stator portion 41a is covered by a shield cover 61, and a shielding means 60 is provided in an enclosed flywheel housings 2 and 3 so that a gap between both iron cores 43 and 49 of the stator portion 41a and a rotor portion 41b is sealed by a seal ring of ferromagnetic body. Thus adherence and entry of oil, fed to the wet-type clutch 10 and splashed, to the stator portion 41a and the gap can be prevented to maintain the electric and magnetic properties of the induction machine 41 always in good condition.

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, which has a retarder for converting mechanical energy of a drive system into electric energy to regenerate the electric energy for 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 shield structure for windings of the induction machine and oil on the 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, when starting and accelerating, the aim is to reduce 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-sized vehicle, a double clutch is operated during a gear shift operation, and the frequency of clutch engagement / disengagement is very high. Therefore, a large amount of heat is generated in the clutch. Therefore,
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 at this position in the state where the wet clutch is 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, the clutch side is inevitably attached to the stator or rotor of the induction machine. The splashed oil will cause problems such as electric leakage. In addition, it is essential for the induction machine to maintain the good magnetic circuit characteristics by arranging the fixed side iron core and the fixed side iron core opposite to each other at a predetermined gap, and if oil enters this gap, its magnetic characteristics will be impaired. Causes problems such as Therefore, it is necessary to shield the stator and rotor of the induction machine so that the oil does not adhere to the stator and the rotor does not enter the gap between the iron cores.

The present invention has been made in view of this point, and in a structure 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 clutch side oil. The purpose is to ensure that the electrical and magnetic characteristics are always excellent by properly shielding.

[0007]

In order to achieve this object, the present invention provides a wet clutch having an engine-side flywheel housed in a closed flywheel housing, the flywheel having an oil circulation device. In the drive system, the induction machine of the retarder device, which is mounted between the flywheel and the flywheel housing, has the stator fixed to the flywheel housing and the rotor fixed to the flywheel. Further, a shielding means is provided so as to cover the stator portion and seal the gap between the iron cores of the stator portion and the rotor portion.

[0008]

According to the above-described structure of the present invention, oil is scattered inside the flywheel housing by the rotation of the wet clutch supplied by the oil circulation device, but in the induction machine, the oil is scattered by the rotation of the rotor itself. The oil hardly adheres to the stator, and is shielded from the stator by the shielding means. Further, the gap between the two iron cores is sealed by the shielding means to prevent oil from entering. In this way, the induction machine can be electrically and magnetically always maintained in a normal operating state, and it becomes possible to operate so that the drive system is electrically braked and assisted while the vehicle is traveling.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a drive system of a vehicle with a retarder will be described. Reference numeral 1 is an engine, 2 and 3 are flywheel housings, 4 is a transmission, and a flywheel 6 that is integrally coupled to an end of a crankshaft 5 of the engine 1 is housed inside the flywheel housings 2 and 3. The input shaft 7 of the transmission 4 is coaxially arranged on the crankshaft 5. The flywheel housings 2 and 3 have a closed structure, and the wet clutch 10 is attached to the flywheel 6.
An oil circulation device 30 is provided outside the flywheel housings 2 and 3. Further, the induction machine 41 of the retarder device 40 is mounted between the outer edge portion 6a of the flywheel 6 and the flywheel housings 2 and 3.

The wet clutch 10 is constructed by supplying oil to a friction clutch, and is a flywheel 6.
A pressure plate 13 is oppositely disposed on the side surface of the transmission via a lining 12 of a clutch disc 11 that is spline-coupled to the transmission input shaft 7. The clutch cover 14 utilizes a rotor portion 41b of the induction machine 41 that is laterally projected and fixed on the outer periphery of the flywheel 6, and uses the rotor portion 41b.
To be concluded. The spring 15 of the clutch cover 14 is biased to the pressure plate 13 so as to press the lining 12 of the clutch disc 11 against the flywheel 6, and the pressure plate 13 is supported by the pin 16 of the clutch cover 14 on the pressure plate 13. When one end of the release lever 17 is operated, the pressure plate 1
3 is connected so as to retract. In addition, a cylindrical holder 18 is installed around the input shaft 7, a slider 20 having a release bearing 19 is movably fitted to the holder 18, and a release fork 21 is attached to the slider 20 to rotate the slider 20. Engaged to move.

The oil circulating device 30 includes a radiation fin 32 on a bracket 31 outside the flywheel housings 2 and 3.
The oil reservoir 33 having the above is fixed, and the supply pipe 34 from the oil reservoir 33 has the electromagnetic valve 35 and is communicated with the inside of the holder 18. Holder 18 in this case
Has an oil passage 18a formed therein and an open end 18b.
It is possible to supply oil to the part of the lining 12. Also, flywheel housings 2 and 3
Return pipe 3 from the oil pan 36 provided at the bottom of the
7 has an oil pump 38 and is communicated with an oil reservoir 33 to constantly cool the oil with the outside air to wet the wet clutch 10.
Is configured to feed.

The induction machine 41 has a stator portion 41a consisting of a stator core 43 fitted to the inner periphery of the stator ring 42, a stator winding 44 arranged on the circumference of the stator core 43, and an outlet wire 45. The stator ring 42 is positioned and fixed in the inside of one flywheel housing 3 by a bolt member 46, and further fixed by being bolted together with a bolt 47 in a state of being sandwiched between both flywheel housings 2, 3. Further, a rotor core 49 fitted to the outer circumference of the rotor ring 48, a rotor portion 41b including a cage winding 52 arranged by using an end ring 50 and a retaining ring 51 on the circumference of the rotor core 49 are provided. Then, the rotor ring 48 is positioned on the outer edge portion 6a of the flywheel 6 and fixed by the bolt 53. And the stator part 4 in this case
The iron cores 1a and the iron cores 43 and 49 of the rotor portion 41b are arranged so as to coincide with each other in the axial direction and to face each other in the radial direction via a predetermined gap. An electric control device 54 is connected to the outlet wire 45 of the stator portion 41a, and an oil shielding means 60 is provided at the gap between the iron cores 43 and 49.

The shielding means 60 has a cross section U as shown in FIG.
It has a non-magnetic shield cover 61 formed in a V-shaped annular shape, and the iron cores 43, 4 are provided at substantially the center of the bottom of the shield cover 61.
A ferromagnetic seal ring 62 having a width substantially equal to the width of 9 and slightly thicker than the gap is fixed. The shield cover 61 is provided inside the flywheel housings 2 and 3 and has a stator portion 41a.
It is mounted so as to cover the periphery thereof along with, and at this time, the seal ring 62 is tightly sandwiched in the gap between the two iron cores 43, 49 of the stator portion 41a and the rotor portion 41b to prevent oil from entering. It is configured to secure the state of the magnetic circuit.

Next, the operation of this embodiment will be described. First, when the engine 1 is in operation, the crankshaft 5 rotates the flywheel 6 to reduce its rotational fluctuation.
At this time, the rotor 41b of the induction machine 41 and the wet clutch 1
0 rotates together. Therefore, when the clutch is engaged in which the lining 12 of the clutch disc 11 is in pressure contact with the flywheel 6 by the pressure plate 13 and the spring 15, engine power is input to the transmission 4 via the wet clutch 10 and is further transmitted to the wheel side. Drive the vehicle. On the other hand, when the clutch pedal is depressed during shifting, the release fork 21 causes the slider 20 to move forward, and the release bearing 19 rotates the release lever 17 to retract the pressure plate 13 and disengage the clutch. When you release the clutch pedal,
The slider 20 moves backward, and the spring 15 again causes the pressure plate 13 to press-contact the lining 12 to engage the clutch.

At this time, in the oil circulation device 30, the oil in the oil reservoir 33 is cooled by the radiation fins 32, and this oil naturally flows down by the supply pipe 34 into the oil passage 18a of the holder 18 and its opening end portion. It is supplied to the part of the lining 12 from 18b. In addition, the oil accumulated in the oil pan 36 is the oil pump 3
8. The return pipe 37 returns the oil to the oil reservoir 33, and thus the cooling oil is always circulated and supplied to the wet clutch 10. Therefore, when the above clutch is disengaged, oil enters between the flywheel 6, the lining 12, and the pressure plate 13,
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.

The oil supplied to the wet clutch 10 scatters inside the flywheel housings 2 and 3 due to its rotation, and the oil lubricates each part of the clutch. On the other hand, the scattered oil is applied to the exposed rotor portion 41b of the induction machine 41, but since the rotor portion 41b itself is rotating at high speed together with the flywheel 6, the adhered oil is immediately blown off by centrifugal force. , The oil hardly adheres. Further, the fixed-side stator portion 41a is reliably shielded by the shielding cover 61 so that oil does not adhere thereto, and electrical troubles such as electric leakage are prevented.

Further, a ferromagnetic seal ring 62 is inserted into the gap between the iron cores 43 and 49 of the stator portion 41a and the rotor portion 41b to prevent oil from entering. Here, since the iron cores 43 and 49 are held in a connected state by the seal ring 62 made of a ferromagnetic material, the iron cores 43 and 49 are formed into a closed magnetic circuit and the magnetic characteristics are improved. Also, the rotor unit 4
1b comes into contact with the seal ring 62 and is rotatably supported, and the backlash and the like are effectively eliminated. Thus
In the electrically operated induction machine 41, the influence of oil is almost eliminated, and the rotor 41b and the drive system can be normally operated by the rotating magnetic field of the stator 41a.

Therefore, when decelerating the vehicle traveling, a rotating magnetic field delayed from the shaft rotation speed is applied to the stator part 41a of the induction machine 41 by the electric control device 54, and when it operates as a generator, the rotation is generated in the rotor part 41b. A decelerating electromagnetic force is applied, and thus electric braking is performed to increase the engine braking effect. At this time, the induction machine 41 converts the mechanical energy of the drive system into electric energy and regenerates it in the battery. When the electric control unit 54 applies this battery power to the stator portion 41a at the time of starting and accelerating, and at the same time, a rotating magnetic field faster than the shaft rotation speed is applied to operate as an electric motor, it is applied to the drive system via the rotor portion 41b. Since the auxiliary driving force is applied, the output torque characteristic is improved in this way.

Although the embodiment of the present invention has been described above, the present invention is not limited to this.

[0020]

As described above, according to the present invention,
In a drive system of a vehicle with a retarder, a method in which a wet clutch is attached to a flywheel inside a closed flywheel housing and an induction machine of a retarder device is attached between the flywheel and the flywheel housing. The oil is prevented from adhering to the rotor part of the rotor due to its rotation, and a shielding means is provided to prevent oil from entering the gap between the stator part and the two iron cores. It is possible to reliably prevent the oil of (3) from adhering to the induction machine or entering the gap between the iron cores, and the induction machine can function normally. Since the shielding means has a structure in which the seal ring is fixed to the annular shielding cover, the structure is simple and there is no need to change the structure of the flywheel housing,
Compact and cheap. The seal ring is preferable because it can improve the magnetic characteristics and can eliminate the rattling of the rotor.

[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 cutaway perspective view of a shielding means.

[Explanation of symbols]

2,3 flywheel housing 6 flywheel 10 Wet clutch 30 oil circulation device 40 retarder device 41 induction machine 41a Stator part 41b Rotor part 43,49 iron core 60 Shielding means 61 Shield cover 62 seal ring

Claims (2)

[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 a retarder device is installed between the flywheel and the flywheel housing. In a drive system in which an induction machine is mounted by fixing a stator section to a flywheel housing and a rotor section to a flywheel, the induction machine covers the stator section and the stator section and the rotor. A drive device for a vehicle with a retarder, characterized in that a shielding means is provided so as to seal a gap between both iron cores of the section. 2. The shield means is configured by fixing a ferromagnetic seal ring to an annular shield cover, the stator cover is covered with the shield cover, and the seal rings are provided on both the stator core and the rotor core. The drive device for a vehicle with a retarder according to claim 1, wherein the drive device is mounted so as to be in close contact with and sandwiched between the gaps.