JP3128523B2 - Driving force transmission device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving force transmitting device disposed between a driving shaft and a driven shaft of a vehicle, such as a driven shaft, for transmitting torque between the two rotating shafts.

[0002]

2. Description of the Related Art As one type of a driving force transmitting device, an inner rotating member and an outer rotating member which are coaxially and relatively rotatable relative to each other as proposed in Japanese Patent Application Laid-Open No. 3-219123 under the name of a coupling device. There is a driving force transmission device including a main clutch mechanism, an electromagnetic pilot clutch mechanism, and a cam mechanism that converts a frictional engagement force of the pilot clutch mechanism into a frictional engagement force with the main clutch mechanism disposed between members.

In this type of driving force transmission device, a main clutch mechanism is frictionally engaged by an operation of a pilot clutch mechanism to transmit torque between the two rotating members. It is disposed between the driven shaft and the driven shaft, and functions to transmit torque between these two shafts. The pilot clutch mechanism includes a plurality of friction clutches, an electromagnetic coil disposed on one side of the friction clutch, and an armature disposed on the other side of the friction clutch. A magnetic path is formed between the friction clutch and the armature,
The armature is attracted to the electromagnetic coil side by the magnetic induction action, and the armature causes the friction clutch to frictionally engage with the attraction force, whereby the pilot clutch mechanism operates.

[0004]

In this type of driving force transmission device, an electromagnetic clutch mechanism is employed as a pilot clutch mechanism, and a current is applied between the electromagnetic coil, the friction clutch and the armature by energizing the electromagnetic coil. Since the formation of a magnetic path is indispensable, the clutch disk and the clutch plate constituting the friction clutch are formed of a metallic magnetic material. For this reason, the pilot clutch mechanism has a problem that the clutch squeals and the clutch is likely to vibrate during its operation.

In this type of driving force transmission device, when the direction of relative rotation between the inner rotating member and the outer rotating member is normal / reverse, the operating direction of the cam mechanism is normal / reverse. There has been a problem that play in the rotation direction between the two cam members and the cam follower constituting the mechanism is easily promoted.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to address the above-mentioned problems by employing another type of pilot mechanism having no clutch in place of the pilot clutch mechanism in the driving force transmission device of this type. is there.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a driving force transmitting device, wherein the driving force transmitting device is disposed between an inner rotating member and an outer rotating member which are coaxially and relatively rotatably positioned. The following mechanisms are provided,
That is, a clutch mechanism that transmits torque between the two rotating members, an electromagnetic pilot mechanism that has an armature that moves in the axial direction by energizing an electromagnetic coil, and converts the axial force of the armature into a rotational force. And a second cam mechanism for converting a rotational force converted by the first cam mechanism into a frictional engagement force with the clutch mechanism. .

In the driving force transmission device, the first
A first cam member which is mounted on the outer rotating member so as to be movable only in the axial direction, and moves in the axial direction by energizing an electromagnetic coil constituting the pilot mechanism;
A second cam member assembled between the two rotating members so as to be rotatable only in the circumferential direction, and an axial force of the first cam member interposed between the two cam members and applied to the second cam member. A structure including a cam follower that converts the force into the rotational direction may be provided.

In the driving force transmission device, the pilot mechanism is constituted by an electromagnetic coil and an armature that is attracted by energizing the electromagnetic coil and moves in the axial direction, and the first armature is configured by the armature. Of the first cam mechanism
A configuration may be employed in which a cam member is formed, and a second cam member of the first cam mechanism may be configured to form a first cam member of the second cam mechanism.

In the driving force transmitting device, the first cam mechanism may include an inclined cam groove provided on one of the first and second cam members and intersecting the axial direction. A configuration may be provided that includes a roller-shaped cam follower provided on the other side of the cam member to face the inclined cam groove and convert an axial force of the first cam member into a rotational force on the second cam member. it can.

In the driving force transmission device, the first cam mechanism may include a concave cam groove provided on a facing surface of the first and second cam members and facing each other; And a ball-shaped cam follower for converting an axial force of the first cam member into a rotational force on the second cam member.

[0012]

In the driving force transmission device configured as described above, the armature is inoperative when the electromagnetic coil forming the pilot mechanism is not energized.
The two cam mechanisms and the clutch mechanism do not operate, and no torque is transmitted between the inner rotating member and the outer rotating member.

When the electromagnetic coil constituting the pilot mechanism is energized, the electromagnetic coil attracts the armature and moves in the axial direction, and this moving force is converted into a rotational force by the first cam mechanism. At the same time, the force in the rotational direction is converted by the second cam mechanism into a frictional engagement force with the clutch mechanism. As a result, the clutch mechanism is frictionally engaged, and torque is transmitted between the inner and outer rotating members. In this case, the frictional engagement force to the clutch mechanism increases in proportion to the amount of current applied to the electromagnetic coil, and the torque transmission between the inner and outer rotating members increases in proportion to the increase in the amount of current applied to the electromagnetic coil. I do.

By the way, in the driving force transmitting device, the axial force of the armature constituting the pilot mechanism is converted into the rotational force by the first cam mechanism, and the rotational force is converted into the second cam. Since the mechanism converts the frictional engagement force to the clutch mechanism, the pilot mechanism does not need to generate the frictional engagement force. For this reason, a pilot mechanism having an electromagnetic coil and an armature that is attracted by energization of the electromagnetic coil and moves in the axial direction without a friction clutch can be used as the pilot mechanism, and the clutch noise caused by the friction clutch can be reduced. Generation and vibration of the clutch can be prevented.

Further, in the driving force transmission device, even when the relative rotation directions of the inner rotating member and the outer rotating member are forward and reverse directions, the moving direction of the armature is always the same axial direction. The operation directions of the cam mechanism and the second cam mechanism do not change, and it is possible to suppress an increase in backlash in the rotation direction between the cam members and the follower constituting each of the cam mechanisms.

In the driving force transmitting device, the pilot mechanism is formed by an electromagnetic coil and an armature that is attracted by energizing the electromagnetic coil and moves in the axial direction, and the armature is used to form the first cam mechanism of the first cam mechanism. 1 cam member, and the second cam member of the first cam mechanism
If the first cam member of the cam mechanism is formed, all of the pilot mechanism, the first cam mechanism, and the second cam mechanism can be made compact, and the driving force transmission device can be made compact. Can be configured.

In this case, the first cam mechanism is connected to the first cam mechanism.
An inclined cam groove provided on one of the second two cam members and intersecting with the axial direction; and an axial force of the first cam member provided on the other of the two cam members and facing the inclined cam groove. A roller-shaped cam follower for converting the rotational force to the second cam member;
A concave cam groove provided on a facing surface of the first and second cam members and facing each other; and an axial force of the first cam member facing the two cam grooves and rotating in a rotational direction with respect to the second cam member. And a ball-shaped cam follower that converts the force into a force.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows an example of a driving force transmitting device according to the present invention. As shown in FIG. 3, the driving force transmission device 10 is disposed on a driving force transmission path to a rear wheel of a four-wheel drive vehicle.

In the vehicle, the transaxle 21
Is provided with a transmission and a transfer, and outputs a driving force of an engine 22 to both axle shafts 24 via a front differential 23 to drive both front wheels 25 and a first propeller shaft 2.
6a.

The first propeller shaft 26a is connected to the second propeller shaft 26b via the driving force transmission device 10, and when these two shafts 26a and 26b are connected to transmit torque, the driving force is reduced. The power is transmitted to the rear differential 27 and is output from the differential 27 to both axle shafts 28 to drive both rear wheels 29. In the vehicle, the first propeller shaft 2
6a forms a drive shaft, and the second propeller shaft 26b forms a driven shaft.

As shown in FIG. 1, the driving force transmitting device 10 includes an outer housing 10 which is an outer rotating member.
a, inner shaft 10b serving as an inner rotating member, clutch mechanism 10c, pilot mechanism 10d, first cam mechanism 1
0e and a second cam mechanism 10f.

The outer housing 10a comprises a bottomed cylindrical outer case 11a, and a cover 11b which is screwed into one end opening of the outer case 11a to cover the opening, and the inner shaft 10b comprises a cover 11b. Extends through the center of the outer case 11a in a liquid-tight manner, and is rotatably supported in a state where movement in the axial direction is restricted. A first propeller shaft 26a is fixedly connected to a distal end portion of the outer case 11a in the outer housing 10a, and a second propeller shaft 26a is connected to the inner shaft 10b.
A propeller shaft 26b is inserted into the inner hole and connected to transmit torque.

As shown in FIG. 1, the clutch mechanism 10c is a multi-disc type having a plurality of clutch disks 12a and a clutch plate 12b.
2a engages with a spline provided on an outer peripheral side of an intermediate portion of the inner shaft 10b on its inner peripheral side, and is assembled so as to be integrally rotatable with the inner shaft 10b and movable in the axial direction. The outer periphery of the clutch plate 12b is engaged with a spline provided on the inner periphery of the outer case 11a, and is assembled so as to be able to rotate integrally with the outer case 11a and to be movable in the axial direction.

The clutch disks 12a and the clutch plates 12b are alternately located, and the outer case 1
1a, they are in contact with each other to frictionally engage with each other, and are separated from each other to be in a free state.

The pilot mechanism 10d includes an electromagnetic coil 13
a and an armature 13b, and the electromagnetic coil 13a is rotatably mounted in the recess 11c of the cover body 11b with its axial movement restricted while being buried in the coil case 13c. . Armature 13b
Is engaged with a spline provided on the inner peripheral side of the outer case 11a, and is mounted so as to be movable in the axial direction. It is located on the opposite side of the wall of the cover body 11b from the electromagnetic coil 13a. ing.

In the pilot mechanism 10d, when a current is supplied to the electromagnetic coil 13a, a magnetic path is formed between the cover body 11b, which is a metallic magnetic material, and the armature 13b. Is sucked into.

The first cam mechanism 10e includes the first cam member 14
, A second cam member 15 and a caro-follower 16a, and the first cam member 14 also serves as an armature 13b constituting a pilot mechanism 10d. Therefore, the first
The cam member 14 can rotate integrally with the outer case 11a and can move in the axial direction. The second cam member 15 is rotatably mounted between the outer case 11a and the inner shaft 10b.

The second cam member 15 is ring-shaped, and a plurality of inclined cam grooves 15a shown in FIGS. 1 and 2 are formed on the outer periphery thereof at predetermined intervals in the circumferential direction. The inclined cam groove 15a is inclined so as to intersect with the axial direction. The cam follower 16 a has a roller shape, and is rotatably attached to the cylindrical portion of the first cam member 14. A plurality of cam followers 16a are assembled so as to face each of the inclined cam grooves 15a, and the inner ends of the cam followers 16a are
I am facing a.

In the first cam mechanism 10e, when the first cam member 14 moves in the axial direction, the second cam member 15 is actuated by the action of the inclined cam groove 15a and the cam follower 16a.
Rotates in the circumferential direction, but since the first cam member 14 also serves as the armature 13b constituting the pilot mechanism 10d, the electromagnetic coil 13a constituting the pilot mechanism 10d
When electricity is supplied to the electromagnetic coil 13a
It is sucked to the side and moves in the axial direction.

The second cam mechanism 10f includes a first cam member 17
, A second cam member 18 and a cam follower 16b, and the first cam member 17 also serves as the second cam member 15 constituting the first cam mechanism 10e. Second cam member 1
Numeral 8 is engaged with and attached to a spline provided on the inner peripheral side of the outer case 11a, is rotatable integrally with the outer case 11a, and is movable in the axial direction.

The cam members 17 and 18 have a plurality of V-shaped cam grooves 17a and 18a formed on surfaces facing each other. The cam grooves 17a and 18a are opposed to each other, and a ball-shaped cam follower 16b is fitted between the two cam grooves 17a and 18a. First cam member 17
Is a spring member 16 interposed between the first cam member 14
and is resiliently contacted with the cam follower 16b and is received by the cover body 11b via a needle bearing. Also, the second cam member 1
Numeral 8 is opposed to the clutch mechanism 10c and is in a state where it can contact the clutch plate 12b.

In the driving force transmission device 10 configured as described above, when the electromagnetic coil 13a constituting the pilot mechanism 10d is not energized, the armature 13b is in a non-operating state, and the first and second cam mechanisms 10e are provided. , 10f and the clutch mechanism 10c do not operate, and the outer housing 1
No torque transmission occurs between Oa and the inner shaft 10b.

When the electromagnetic coil 13a constituting the pilot mechanism 10d is energized, the electromagnetic coil 13a
Sucks the armature 13b (the first cam member 14 of the first cam mechanism 10e) and moves it in the axial direction. As a result, the second cam member 15 (the first cam member 17 of the second cam mechanism 10f) is rotated in the circumferential direction by the action of the inclined cam groove 15a of the first cam mechanism 10e and the cam follower 16a, and the second cam mechanism is rotated. By the action of the cam grooves 17a and 18a of 10f and the cam follower 16b, the second cam member 18 moves in the axial direction to press and frictionally engage each clutch disc 12a and each clutch plate 12b constituting the clutch mechanism 10c. .

Therefore, the clutch mechanism 10c frictionally engages, and the outer housing 10a and the inner shaft 10b
Transmission of torque occurs between them. In this case, the clutch mechanism 10
Since the frictional engagement force with respect to c increases in proportion to the amount of current applied to the electromagnetic coil 13a, the transmission torque between the outer housing 10a and the inner shaft 10b is reduced by increasing the amount of current applied to the electromagnetic coil 13a. Can be increased.

Incidentally, in the driving force transmitting device 10, the armature 13 constituting the pilot mechanism 10d is provided.
b is converted into a rotational force by the first cam mechanism 10e, and the rotational force is converted into the second cam mechanism 10e.
Since it is configured to convert the frictional engagement force to the clutch mechanism 10c by f, there is no need to generate a frictional engagement force in the pilot mechanism 10d. Therefore, the electromagnetic coil 13a and the electromagnetic coil 13
pilot mechanism 10 without an armature 13b having an armature 13b which is attracted and moved in the axial direction by the energization of
Since d can be adopted, generation of clutch squeal and vibration of the clutch due to the friction clutch can be prevented.

Further, in the driving force transmission device 10, even when the relative rotation direction of the outer housing 10a and the inner shaft 10b is the forward / reverse direction, the armature 13b
Are always in the same axial direction, the operating directions of the first cam mechanism 10e and the second cam mechanism 10f do not change, and the two cam members 14 and 15 constituting these cam mechanisms 10e and 10f are An increase in backlash in the rotating direction between the caro followers 16a and between the cam members 17, 18 and the caro followers 16b can be suppressed.

Further, in the driving force transmission device 10, the pilot mechanism 10d is formed by the electromagnetic coil 13a and the armature 13b, and the armature 13b
Forms the first cam member 14 of the first cam mechanism 10e,
In addition, since the first cam member 17 of the second cam mechanism 10f is formed by the second cam member 15 of the first cam mechanism 10e, the pilot mechanism 10d and the first cam mechanism 10
e, and all the mechanisms of the second cam mechanism 10f can be made compact overall, and the driving force transmission device 10 can be made compact.

In this case, the first cam mechanism 10e is provided with an inclined cam groove 15a provided in the second cam member 15, and a cam follower 16a provided in the first cam member 14 and facing the inclined cam groove 15a. Therefore, the first cam member 1
4 can be smoothly converted to the force in the rotation direction of the second cam member 15.

FIG. 4 shows another example of the driving force transmission device according to the present invention. The driving force transmission device 30 includes:
The driving force transmission device 10 has a basic configuration, and is different from the driving force transmission device 10 in a pilot mechanism 30d and a first cam mechanism 30e. Therefore,
Pilot mechanism 30d in the driving force transmission device 30
The first cam mechanism 30e will be described in detail, and the other components will be denoted by the same reference numerals in the thirties and will not be described in detail, and will only be described as necessary.

Thus, in the driving force transmission device 30, the pilot mechanism 30d is constituted by the electromagnetic coil 33a and the armature 33b.
Reference numeral 0e denotes a first cam member 34 also serving as an armature 33b, a second cam member 35, and a cam follower 36a.

The electromagnetic coil 33a constituting the pilot mechanism 30d is embedded in a coil case 33c, and the coil case 33c is rotatably fitted in a recess 31c of the cover body 31b. The armature 33b has a tubular shape, is engaged with a spline provided on the inner periphery of the outer case 31a, and is assembled so as to be movable in the axial direction, and is provided between the outer periphery of the cover body 31b and the inner periphery of the outer case 31a. Move forward and backward through the recess 31d.

In the driving force transmission device 30, the cover 31b of the outer housing 30a is
1, the inner tubular portion 31b2, and both tubular portions 31b1, 31b.
It is integrally formed by a connecting portion 31b3 for connecting b2. In the cover 31b having such a configuration, the two cylindrical portions 3
1b1 and 31b2 are made of a metal magnetic material, and the connecting portion 31b3 is made of a metal non-magnetic material.

Thus, in the pilot mechanism 30d, when the electromagnetic coil 33a is energized, the electromagnetic coil 3a
3a, a magnetic path is formed between the outer cylindrical portion 31b1 of the cover body 31b, the armature 33b, the inner cylindrical portion 31b2 of the cover body 31b, and the electromagnetic coil 33a.
b is attracted by the magnetic induction action and advances in the recess 31d in the axial direction.

The first cam mechanism 30e includes a first cam member 34
, A second cam member 35 and a caro-follower 36a, and the first cam member 34 also serves as an armature 33b constituting the pilot mechanism 30d. Therefore, the first
The cam member 34 can rotate integrally with the outer case 31a and can move in the axial direction. The second cam member 35 is rotatably mounted between the outer case 31a and the inner shaft 30b.

The second cam member 35 has a ring shape, and a plurality of inclined cam grooves 35a shown in FIGS. 1 and 2 are formed on the outer periphery thereof at predetermined circumferential intervals. The inclined cam groove 35a is inclined so as to intersect the axial direction. The cam follower 36a has a roller shape, and is rotatably attached to the first cam member 34. A plurality of cam followers 36a are assembled so as to face each inclined cam groove 35a, and the inner ends thereof face each inclined cam groove 35a.

In the first cam mechanism 30e, when the first cam member 34 moves in the axial direction, the second cam member 35 is actuated by the action of the inclined cam groove 35a and the cam follower 36a.
Rotates in the circumferential direction, but since the first cam member 34 also serves as the armature 33b forming the pilot mechanism 30d, the electromagnetic coil 33a forming the pilot mechanism 30d
When electricity is supplied to the electromagnetic coil 33a
It is sucked to the side and moves in the axial direction.

The second cam mechanism 30f is connected to the driving force transmitting device 1
The second cam mechanism 10f includes a first cam member 37, a second cam member 38, and a cam follower 36b, and the first cam member 37 constitutes a first cam mechanism 30e. The second cam member 35 is also used.
The second cam member 38 moves in the axial direction by the rotation of the first cam member 37, and presses the clutch disk 32a and the clutch plate 32b constituting the clutch mechanism 30c to frictionally engage.

In the driving force transmission device 30, similarly to the driving force transmission device 10, it operates by energizing the electromagnetic coil 33a constituting the pilot mechanism 30d.
Torque is transmitted between the outer housing 30a and the inner shaft 30b, and the driving force of the first propeller shaft 26a is transmitted to the second propeller shaft 26b.

In the driving force transmission device 30, the pilot mechanism 30d has no friction clutch, so that the same operation and effect as those of the driving force transmission device 10 can be obtained.

FIG. 5 shows still another example of the driving force transmission device according to the present invention. The driving force transmission device 4
Numeral 0 designates a basic configuration of the driving force transmission device 10, and differs from the driving force transmission device 10 in that the pilot mechanism 40d and the first cam mechanism 40e are different from each other and are incorporated in a differential case. Are different. Therefore, hereinafter, the pilot mechanism 40d and the first cam mechanism 40e in the driving force transmission device 40 will be described in detail, and the other components will be denoted by similar reference numerals in the forties, and detailed description thereof will be omitted. At the same time, explanation will be given if necessary.

In the driving force transmitting device 40, the pilot mechanism 40d is constituted by the electromagnetic coil 43a and the armature 43b.
Reference numeral 0e denotes a first cam member 44 also serving as an armature 43b, a second cam member 45, and a pair of ball-shaped cam followers 46a1 and 46a2.

The electromagnetic coil 43a constituting the pilot mechanism 40d is buried in a coil case 43c, and the coil case 43c is rotatably fitted in a recess 41c of the cover 41b. The armature 43b has a ring shape, and is engaged with a spline provided on the inner periphery of the outer case 41a so as to be movable in the axial direction. The first cam member 44 in the first cam mechanism 40e is
The armature 43b also constitutes the pilot mechanism 40d. Therefore, the first cam member 44 is
1a is integrally rotatable and movable in the axial direction. The second cam member 45 is rotatably mounted between the first cam member 44 and the cover body 41b and between the outer case 41a and the inner shaft 40b.

First cam member 44 and second cam member 45
Are ring-shaped, and arc-shaped cam grooves 44a, 44b and cam grooves 45a, 45b are formed on their facing surfaces. The cam grooves 44a and 45a and the cam grooves 44b and 45b face each other, and the cam followers 46a1 and 46a2 are fitted between the cam grooves.

In the driving force transmitting device 40, the cover 41b of the outer housing 40a is formed entirely of a metal magnetic material, but has an annular portion 41b1 formed of a metal non-magnetic material. Also, the first and second cam members 4
The second cam member 45 is formed of a metal non-magnetic material.
5c. The annular portion 45c has two cam grooves 45a,
The second cam member 45 extends between the outer side and the inner side where the respective cam grooves 45a and 45b are located. The two annular portions 45c and 41b1 face each other at their ends.

The second cam mechanism 40f is connected to the driving force transmitting device 1
The second cam mechanism 10f is substantially the same as the second cam mechanism 10f, and includes a first cam member 47, a second cam member 48, and a ball-shaped cam follower 46b.
Also serves as the second cam member 45 constituting the first cam mechanism 40e. The second cam member 48 is moved in the axial direction by the rotation of the first cam member 47, and the clutch disk 42a and the clutch plate 4 constituting the clutch mechanism 40c are moved.
2b is pressed for frictional engagement.

The first cam mechanism 40e and the second cam mechanism 40f
In the assembled state of the second cam mechanism 40f, the cam follower 46b is completely fitted into each of the cam grooves 47a and 48a, whereas the first cam mechanism 40e has Each cam follower 46a1, 46a2
Is in a fitted state slightly shifted in the circumferential direction with respect to the cam grooves 44a, 45a, 44b, 45b.

Thus, when the electromagnetic coil 43a of the pilot mechanism 40d is energized, the electric coil 43a, the cover 41b, the second cam member 45, the cam follower 46a
1, the first cam member 44, the cam follower 46a2, the second cam member 45, the cover 41b, and the electromagnetic coil 43a
A magnetic path is formed therebetween, and the armature 43b (the first cam member 44) is attracted by the magnetic induction action and moves in the axial direction.

In the first cam mechanism 40e, when the first cam member 44 moves in the axial direction, each of the cam grooves 44a,
5a, cam followers 46a1, and each cam groove 44
b, 45b and the cam follower 46a2 rotate the second cam member 45 in the circumferential direction.
4 is an armature 43b constituting a pilot mechanism 40d
When the electromagnetic coil 43a constituting the pilot mechanism 40d is energized, it is attracted to the electromagnetic coil 43a side by the magnetic induction action and moves in the axial direction.

In the driving force transmitting device 40, similarly to the driving force transmitting device 10, it operates by energizing the electromagnetic coil 43a constituting the pilot mechanism 40d.
Torque transmission occurs between the outer housing 40a and the inner shaft 40b, and torque transmission occurs between both shafts. Further, in the driving force transmission device 40, since the pilot mechanism 40d has no friction clutch, the same operation and effect as those of the driving force transmission device 10 can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a driving force transmission device according to the present invention.

FIG. 2 is a partially enlarged transverse sectional view showing a relationship between a cam groove and a cam follower in a first cam mechanism constituting the driving force transmission device.

FIG. 3 is a schematic configuration diagram of a four-wheel drive vehicle equipped with the driving force transmission device.

FIG. 4 is a sectional view showing another example of the driving force transmission device according to the present invention.

FIG. 5 is a partially omitted sectional view showing still another example of the driving force transmission device according to the present invention.

[Explanation of symbols]

10, 30, 40 ... driving force transmission device, 10a, 30a,
40a ... outer housing, 10b, 30b, 40b ...
Inner shaft, 10c, 30c, 40c: clutch mechanism, 10d, 30d, 40d: pilot mechanism, 10
e, 30e, 40e... first cam mechanism, 10f, 30f,
40f: second cam mechanism, 11a, 31a, 41a: outer case, 11b, 31b, 41b: cover body, 11
c, 31c, 41c ... recess, 12a, 32a, 42a ...
Clutch disks, 12b, 32b, 42b ... clutch plates, 13a, 33a, 43a ... electromagnetic coils, 13
b, 33b, 43b ... armature, 13c, 33c, 4
3c: coil case, 14, 17, 34, 37, 44,
47 ... first cam member, 15, 18, 35, 38, 45,
48: second cam member, 15a, 35a: inclined cam groove, 4
4a, 44b, 45a, 45b ... cam groove, 16a, 16
b, 36a, 46a1, 46a2, 46b... Caro followers, 17a, 18a, 37a, 38a, 47a, 48a
... Cam groove, 21 ... Transaxle, 22 ... Engine,
23: front differential, 24: axle shaft, 25: front wheel, 26a: first propeller shaft,
26b: second propeller shaft, 27: rear differential, 28: axle shaft, 29: rear wheel.

Continued on the front page (72) Inventor Koichi Suzuki 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Akihiko Ikeda 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (56) Reference Document JP-A-2-271117 (JP, A) JP-A-3-282019 (JP, A) JP-A-4-151025 (JP, A) JP-A-62-209229 (JP, A) JP-A-6-209229 43364 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16D 41/00-47/06 F16D 27/10

Claims (6)

(57) [Claims] A clutch mechanism is disposed between an inner rotating member and an outer rotating member which are coaxially and relatively rotatable with each other, and transmits a torque between the two rotating members. An electromagnetic pilot mechanism having a moving armature, a first cam mechanism for converting an axial force of the armature into a rotational force, and a rotational force converted by the first cam mechanism. A driving force transmission device comprising a second cam mechanism that converts a frictional engagement force with a clutch mechanism. 2. The driving force transmission device according to claim 1, wherein the first cam mechanism is attached to the outer rotating member so as to be movable only in an axial direction, and is connected to an electromagnetic coil constituting the pilot mechanism. The first that moves in the axial direction by energizing the
A cam member, a second cam member assembled between the two rotating members so as to be rotatable only in a circumferential direction, and an axial force of the first cam member interposed between the two cam members, (2) A driving force transmission device comprising a cam follower that converts the force into a rotational direction with respect to the two cam members. 3. The driving force transmission device according to claim 1, wherein the pilot mechanism is constituted by an electromagnetic coil and an armature which is attracted by energization of the electromagnetic coil and moves in the axial direction, and the armature is arranged in the armature. Is a driving force transmission device, which forms a first cam member of the first cam mechanism. 4. The driving force transmission device according to claim 1, wherein the second cam member of the first cam mechanism forms a first cam member of the second cam mechanism. A driving force transmission device characterized by the above-mentioned. 5. The driving force transmission device according to claim 1, wherein said first cam mechanism is provided with said first and second cam mechanisms.
An inclined cam groove provided on one of the second two cam members and intersecting with the axial direction; and an axial force of the first cam member provided on the other of the two cam members and facing the inclined cam groove. A driving force transmission device comprising a roller-shaped cam follower for converting a force in the rotation direction with respect to the second cam member. 6. The driving force transmission device according to claim 1, wherein said first cam mechanism is provided with said first and second cam mechanisms.
Concave cam grooves provided on the opposing surfaces of the second cam members and facing each other, and facing the two cam grooves, converting the axial force of the first cam member into a rotational force on the second cam member. A driving force transmission device comprising a ball-shaped cam follower.