JP2002013547A - Damper for hybrid driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper for hybrid driving device which can respond to widely variable torques originated from a plurality of power sources without increasing a dimension and weight thereof. SOLUTION: The damper 30 for hybrid driving device which transmits variable torque produced by an engine 10 or an electric motor 20 while restraining thereof, the damper 30 for hybrid driving device comprising a limiter mechanism 35 which cuts off transmission of power when the variable torque by the engine 10 or the electric motor 20 reaches specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for a hybrid drive having a plurality of power sources (for example, an engine and an electric motor).

[0002]

2. Description of the Related Art As a conventional damper for a hybrid drive device, there is a technique disclosed in Japanese Patent Application Laid-Open No. 9-226392. The above-mentioned publication discloses a technique in which a damper is provided on an output shaft of an engine in a hybrid drive device including an engine and an electric motor as power sources to suppress fluctuation torque caused by the engine and the electric motor.

[0003]

Here, the power source such as an engine or an electric motor generally has a large inertia due to the need for weight and radial dimensions, and is compared with a case where there is only one power source. Therefore, the fluctuation torque that must be suppressed by the damper is large. Therefore, in a so-called hybrid drive device that is driven using a plurality of power sources, a damper for suppressing a large fluctuation torque due to the inertia of the power source is required.

However, in the damper for a hybrid drive disclosed in the above publication, the fluctuation torque caused by the electric motor and the engine is suppressed only by the elastic member such as rubber, so that the large fluctuation torque can be suppressed only by the elastic member. Thus, it is necessary to increase the suppression capacity of the elastic member against the rotational load. Further, after the fluctuation torque cannot be suppressed by the elastic member, the two power sources directly receive the fluctuation torque, so that it is necessary to set the strength of each member large.

Therefore, the size of the elastic member increases, and the size of the member related to the output of the power source connected via the damper also increases. For this reason, the entire apparatus is increased in size, the weight of the apparatus is increased, and the fuel consumption is deteriorated, which is not preferable.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has been made to provide a damper for a hybrid drive device capable of coping with a large fluctuation torque by a plurality of power sources without increasing the size and weight. Subject.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is a damper for a hybrid drive device that transmits while suppressing a fluctuation torque generated by a first power source and a second power source. A limiter mechanism is provided for interrupting the transmission of power when the fluctuation torques of the first power source and the second power source reach a predetermined value.

[0010] According to the first aspect, since the limiter mechanism does not transmit the fluctuation torque of a predetermined value or more, it is not necessary to adopt a configuration for allowing a large fluctuation torque (increase in strength and size of each member). Therefore, even if a large fluctuating torque is generated by providing a plurality of power sources, it is possible to cope without increasing the size of the entire apparatus, which is preferable.

It should be noted that the hybrid drive in the present invention means being driven by having two or more power sources.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a hybrid drive device according to the present embodiment, which will be described as being used as a drive device of an automobile.

The hybrid drive system includes an engine 10 as a first power source and an electric motor 2 as a second power source.
0, a damper 30 for a hybrid drive device that is disposed between the engine 10 and the electric motor 20 and suppresses a fluctuation torque therebetween, and a planetary gear mechanism 40 that is disposed between the electric motor 20 and the damper 30. A reduction mechanism 50 that transmits power to driving wheels (not shown), a belt 60 that connects the ring gear 41 side of the planetary gear mechanism 40 and the reduction mechanism 50,
A power generation motor 70 connected to the planetary gear mechanism 40 and a battery 90 electrically connected to the power generation motor 70 and the electric motor 20 via the inverter 80 are provided.

The output of the engine 10 is connected to the carrier 42 of the planetary gear mechanism 40 via the damper 30, and the generator motor 70 is connected to the sun gear 43 of the planetary gear mechanism 40 and generated by driving the engine 10. This is for charging the battery 90 with electric energy. The output of the electric motor 20 is connected to a ring gear 41.

The operation of the hybrid drive device having the above configuration will be briefly described. When only the engine 10 is driven, the output of the engine 10 is output to the carrier 42 of the planetary gear mechanism 40 via the damper 30, and the entire carrier 42 rotates around the output shaft 11 of the engine 10. As a result, the ring gear 41 rotates, and the belt 6
Power is transmitted to the speed reduction mechanism 50 through the drive wheel 0 to drive a drive wheel (not shown). At this time, the sun gear 43 is also rotated, and the generator motor 70 generates power, and the battery 90
Is charged. Next, when the engine 10 is stopped and only the electric motor 20 is driven, the ring gear 41 rotates and power is transmitted to the reduction mechanism 50 via the belt 60. At this time, the carrier 42 itself rotates only without changing its position.
Power is not transmitted. Further, it is also possible to drive both the engine 10 and the electric motor 20 to transmit power to the speed reduction mechanism 50. Such switching of the power source (switching between driving and non-driving of the electric motor 20) is switched by a control device (not shown) according to various signals such as a vehicle speed and an accelerator opening.

The damper 30 which is the gist of the present invention will be described. FIG. 2 is a partially cutaway plan view of the damper 30 according to the first embodiment of the present invention, and FIG. 3 is a sectional view taken along line AA of FIG.

The damper 30 is connected to the output shaft 11 of the engine 10.
And a carrier 42 connected to the electric motor 20 via a planetary gear mechanism 40 and rotatably disposed coaxially with the first rotating member 31. Carrier shaft 43 connected to
A, a second rotating member 32 connected to the first rotating member 31, an intermediate member 33 disposed to be rotatable relative to each of the first rotating member 31 and the second rotating member 32 within a predetermined angle range, and a second rotating member. A torsion member 34 that is disposed in the windows 32A and 33D of the member 32 and the intermediate member 33 and that suppresses fluctuation torque between the first rotating member 31 and the second rotating member 32 by elastically compressing in the circumferential direction; When the fluctuation torque between the first rotating member 31 and the second rotating member 32 reaches a predetermined value, the first rotating member 31
And a limiter mechanism 35 for interrupting the transmission of power from the first rotating member 32 to the second rotating member 32.

The intermediate member 33 includes a first intermediate plate 33A and a second intermediate plate 33A.
The intermediate plate 33B and the intermediate plate 33B are fixed by rivets 38,
A hysteresis mechanism 39 for generating hysteresis between the second rotation member 32 and the second rotating member 32 is disposed on the inner peripheral side. There are two types of torsion members 34 in the four windows 32A and 33D, 34A and 34B, which suppress different fluctuation torques. The limiter mechanism 35 is held on the inner periphery of the first rotating member 31 on the outer peripheral side of the torsion member 34, and a friction material 35A formed on both surfaces of a plate 33C connected to the second intermediate plate 33B, and a friction material 35A Spring 35B, which is an urging member for urging the left side in FIG. 3, is sandwiched between the conical spring 35B and the friction material 35A, and is disposed so as to be integrally rotatable with the first rotating member 31 and axially displaceable. And a plate 35C. The second rotating member 32 is spline-coupled to the carrier shaft 42A, and is configured to be displaced in the axial direction following the wear of the friction material 35A. Parker rising treatment is performed on portions that come into contact with the friction material 35A to stabilize the friction coefficient, so that a stable friction coefficient is maintained even during long-term use.

The operation of the thus configured damper 30 will be described. When only the engine 10 is driven, the first rotating member 31 rotates with the driving of the engine 10. In the range where the fluctuation torque is smaller than the predetermined value,
The rotation torque is transmitted to the intermediate member 33 via the limiter mechanism 35, and the intermediate member 33 rotates. The rotation torque of the intermediate member 33 is transmitted through the torsion member 34 to the second rotation member 3.
2, the torsion member 34 according to the fluctuating torque.
The second rotating member 32 rotates while elastically shrinks. As described above, the engine 1 is attached to the carrier shaft 42A via the damper 30.
0 drive is transmitted.

When the driving torque of the engine 10 increases from the above state and the fluctuation torque between the first rotation member 31 and the second rotation member 32 reaches a predetermined value (the fluctuation torque becomes equal to the plate 35C and the first rotation member). Friction material 35 with 31
A when the holding torque in the rotation direction of A is reached), the friction material 35A starts to slide, and the intermediate member 33 and the second rotation member 32
And no fluctuation torque greater than or equal to the predetermined value is transmitted.
In the first embodiment, the predetermined value of the fluctuating torque (the torque at which the friction material 35A starts to slide) is set in a range of 2.0 to 3.0 of the fluctuating torque that can be suppressed by the torsion member 34.

Next, a second embodiment of the present invention will be described. FIG. 4 is a partially cutaway plan view of a damper according to the second embodiment, and FIG. 5 is a sectional view taken along line BB of FIG.

The second embodiment differs from the damper 30 described in the first embodiment in that a limiter mechanism is provided on the inner peripheral side of the torsion member. The number of members is different from that of the first embodiment merely by a design change, and has nothing to do with the features of the second embodiment. The description of the configuration common to the first embodiment will be omitted. The configuration of the entire hybrid drive device is the same as that shown in FIG.

The damper 130 is disposed so as to be rotatable relative to each of the two plate members 131A connected to the first rotating member 131 and each of the first rotating member 131 and the second rotating member 132 within a predetermined angle range. The intermediate member 133 provided, the torsion member 134 for suppressing the fluctuation torque between the plate member 131A and the intermediate member 133, and when the fluctuation torque between the second rotating member 132 and the intermediate member 133 reaches a predetermined value. ,
And a limiter mechanism 135 for interrupting transmission of power from the intermediate member 133 to the second rotating member 132.

The limiter mechanism 135 includes the torsion member 1
34 is held by the second rotating member 132 on the inner peripheral side of
A friction material 135A formed on both surfaces of the intermediate member 133;
A disc spring 135B, which is an urging member for urging the friction material 135A to the left in FIG. 5, is disposed between the disc spring 135B and the friction material 135A so as to be integrally rotatable with the second rotating member 132 and axially displaceable. And a plate 135C provided.

The operation of the damper 130 will be described. When only the engine 10 is driven, the first rotating member 131 and the plate 131A rotate as the engine 10 is driven. The rotation torque of the plate 131A is the torsion member 134.
Is transmitted to the intermediate member 133. When the fluctuation torque is smaller than a predetermined value, the limiter mechanism 135
The rotation torque is transmitted to the second rotation member 132 via
The second rotating member 132 rotates. Thus, damper 3
The drive of the engine 10 is transmitted to the carrier shaft 42 via the control shaft 0.

From the above state, the driving torque of the engine 10 increases, and the first rotating member 131 and the second rotating member 13
When the fluctuation torque between the friction material 13 and the friction material 13 reaches a predetermined value.
5A starts to slide, and the intermediate member 133 and the second rotating member 132
And no fluctuation torque greater than or equal to the predetermined value is transmitted.

In the second embodiment, the limiter mechanism 13
Since 5 is formed on the inner peripheral side of the torsion member 134, it is possible to reduce the radial dimension as compared with the damper 30 of the first embodiment. Also, limiter mechanism 1
35 can be assembled first, and the torsion member 134 and the plate material 131A that are easily affected by heat can be assembled later.

FIG. 6 is a sectional view of a damper according to a third embodiment of the present invention. The third embodiment is different from the first embodiment only in that an inertia body 36 is added to the damper 30 described in the first embodiment, and other configurations are the same as those in the first embodiment. Is omitted.

The inertial body 36 is a metal disk, and is fixed to the inner periphery of the second rotating member 32 with bolts 37. Providing the inertia body 36 on the second rotating member 32 side can effectively suppress the fluctuation torque caused by the engine 10 and the electric motor 20, which is preferable.

FIG. 7 is a sectional view of a damper according to a fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment only in the additional structure of the inertial body, and the other configuration is the same as that of the third embodiment, and the description is omitted.

The inner periphery of the inertial body 136 is spline-coupled to the carrier shaft 42A, and cannot rotate relative to the carrier shaft 42A and can move in the axial direction. Inertial body 13
An elastic body 37 made of rubber or resin for reducing the backlash in the axial direction of the inertial body 136 is provided between the second rotating member 32 and the axial gap between the inertial body 136 and the carrier shaft 42A. .

As described above, according to the present invention, since the limiter mechanism is used to cut off the fluctuating torque of a predetermined value or more, a configuration for allowing a large fluctuating torque (high strength of each member, large size ) Is no longer necessary. Therefore, even if a large fluctuating torque is generated by providing a plurality of power sources, it is possible to cope without increasing the size of the entire apparatus, and it is possible to achieve downsizing, low fuel consumption, and further low vibration. Will be possible.

Although the embodiment of the present invention has been described,
The present invention is not intended to be limited to the above-described embodiment,
For example, the present invention can be applied to a hybrid drive device having a structure as shown in FIG. The hybrid drive device of FIG. 8 includes an output shaft 211 of an engine 210 and an electric motor 22.
The output motor 221 is spline-coupled to the output shaft 221, and the electric motor 220 is displaced in the direction of the arrow in FIG.
The drive is switched from the drive of the engine 210 alone to the drive of both the electric motor 220 and the engine 210, and the power is transmitted to the reduction mechanism 250 via the belt 260. As described above, any form may be used as long as it is a damper for a hybrid drive device that is in a form according to the gist of the present invention.

[0032]

According to the present invention, since the fluctuation torque exceeding a predetermined value is not transmitted by the limiter mechanism, it is not necessary to adopt a configuration for allowing a large fluctuation torque (increase in strength and size of each member). Therefore, even if a large fluctuating torque is generated by providing a plurality of power sources, it is possible to cope without increasing the size of the entire apparatus, which is preferable.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a hybrid drive device of the present invention.

FIG. 2 is a partially cutaway plan view of a hybrid drive device damper according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a partially cutaway plan view of a hybrid drive device damper according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a sectional view of a damper for a hybrid drive device according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a damper for a hybrid drive device according to a fourth embodiment of the present invention.

FIG. 8 is a schematic diagram showing a hybrid drive device of a type different from that of FIG. 1;

[Explanation of symbols]

 10, 210: Engine (first power source) 20, 220: Electric motor (second power source) 30, 130, 230: Hybrid device damper 31, 131: First rotation Member 32, 132 ... second rotating member 34, 134 ... torsion member 35, 135 ... limiter mechanism 35A, 135A ... friction material 35B, 135B ... disc spring (biasing member) 35C 135C: plate 36: inertial body 40: planetary gear mechanism 131A: plate material

Claims (10)

[Claims] 1. A damper for a hybrid drive device that transmits while suppressing a fluctuation torque generated by a first power source and a second power source, wherein the fluctuation torque is generated by the first power source and the second power source. A damper for a hybrid drive device, comprising: a limiter mechanism that cuts off transmission of power when the pressure reaches a predetermined value. 2. A first rotating member that is rotationally driven by the first power source, a second rotating member connected to the second power source, and a portion between the first rotating member and the second rotating member. And a torsion member that suppresses the fluctuation torque of the first rotation member. When the fluctuation torque between the first rotation member and the second rotation member reaches a predetermined value, the limiter mechanism moves from the first rotation member to the second rotation member. 2. The damper for a hybrid drive device according to claim 1, wherein the transmission of the power is interrupted. 3. The damper according to claim 2, wherein the second rotating member is connected to a second power source via a planetary gear mechanism. 4. A first rotating member rotatably driven by one or both of the first power source and the second power source, and a second rotating member connected to a transmission, wherein the limiter mechanism comprises: The power transmission from the first rotating member to the second rotating member is cut off when the fluctuation torque between the first rotating member and the second rotating member reaches a predetermined value, wherein the power transmission is stopped. For hybrid drive systems. 5. The damper for a hybrid drive device according to claim 2, wherein the first rotating member and the second rotating member are arranged coaxially and relatively rotatable. 6. The limiter mechanism includes a friction member disposed in a gap between the first rotation member and the second rotation member, and a friction member disposed between the first rotation member and the friction member to rotate the friction member in the second rotation member. The damper for a hybrid drive device according to claim 5, further comprising an urging member for urging the member toward the member. 7. The damper for a hybrid drive device according to claim 5, wherein the limiter mechanism is disposed radially inward of the torsion member. 8. A plate member is disposed in a rotational gap between the first rotating member and the second rotating member, and a torsion member is disposed between the plate member and the first rotating member. The damper for a hybrid drive device according to claim 7, wherein a limiter mechanism is provided between the two rotation members. 9. The damper for a hybrid drive device according to claim 6, wherein a treatment for stabilizing a friction coefficient is performed on the friction material or a member that comes into friction contact with the friction material. . 10. An inertial body is formed on the first rotating member or the second rotating member.
A damper for a hybrid drive device according to claim 8.