JP3324715B2 - Torque transmission mechanism of rotating electric machine for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque transmitting mechanism for a rotating electric machine for a vehicle, which receives torque from and / or applies torque to the vehicle engine. For example, the present invention can be applied to a vehicular generator / motor that exchanges torque with a vehicular engine.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 61-54949 and Japanese Patent Application Laid-Open No. 63-202255 disclose that a vehicular generator-motor is provided between a rear end of a crank shaft of a vehicle engine and a clutch. Has been disclosed. JP-A-2-26415
No. 3 discloses a vehicular generator-motor system in which a belt speed is increased by a pulley fixed to a front end of a crankshaft of a vehicle engine via a speed increasing gear.

[0003]

However, the vehicular generator / motor disclosed in the above publication still has the following problems. First, when a vehicular generator / motor is provided at the rear end of the crankshaft, a disadvantage that the axial length of the vehicle power system increases, a drawback that cannot be applied to the current vehicle power system or the vehicle body, a vehicular generator / motor Disadvantageously difficult to maintain. Also,
There is also a problem that the vehicular generator motor tends to receive heat from the vehicular engine, making it difficult to cool it.

[0004] Secondly, when a vehicular generator / motor is driven by a belt with a pulley at the front end of a crankshaft, it is difficult to increase the diameter of the pulley due to restrictions on space distribution with other vehicle accessories. There is a disadvantage that the generator motor for a vehicle is enlarged. On the other hand, if the above-described speed increasing gear is provided, a large speed increasing ratio can be ensured, and the vehicle generator motor can be reduced in size and speed. However, there is a disadvantage that the configuration is significantly complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can be easily coupled to a vehicle engine at a large speed increase ratio while minimizing the complexity of the structure and changing the design of the existing vehicle structure as much as possible. It is a first object of the present invention to provide a torque transmission mechanism for a vehicular rotating electrical machine. Next, when connecting the vehicle engine and the vehicle rotary electric machine with a belt,
It is necessary to apply a necessary tension to the belt, and it is necessary to reduce the diameter of the small pulley on the vehicle rotary electric machine side in order to increase the speed increasing ratio of the vehicle rotary electric machine. In this case, in order to prevent belt slippage at the small pulley, it is preferable to arrange an idle pulley close to the small pulley and increase the belt contact angle of the small pulley.

However, it is not easy to fix (fasten) the vehicle rotating electric machine and the idle pulley close to each other on the supporting mount, which is located between the vehicle engine or the power transmission system and the vehicle rotating electric machine. In addition, even when possible, the structure becomes complicated and assembly work becomes difficult. A second object of the present invention is to provide a torque transmitting mechanism for a rotating electric machine for a vehicle that can reduce belt slippage of a small pulley on the rotating electric machine for a vehicle, despite the simple structure and easy assembly work. That is.

Further, as described above, the belt drive mechanism having a large speed increase ratio has a disadvantage that even a slight elongation of the belt causes the belt to slide on the small pulley. A third object of the present invention is to provide a torque transmitting mechanism for a rotating electric machine for a vehicle, which can reduce the slack of a belt with a simple structure.

[0008]

According to a first aspect of the present invention, a torque transmission mechanism for a rotating electric machine for a vehicle is provided between a rear end of a crankshaft of a vehicle engine and a power transmission system driven by the crankshaft. A large pulley, and a small pulley fixed to a rotating shaft of a rotating electric machine for a vehicle, which is fixed to a supporting mount by a fastening mechanism and is belt-coupled to the large pulley, and a disk portion of the large pulley. Is characterized by comprising a torque transmission plate fixed to the crankshaft and the power transmission system and transmitting torque from the crankshaft to the power transmission system.

[0009] In a first subordinate aspect of the first invention, the large pulley has a tubular belt hook portion formed on the outer periphery of the disk portion and surrounding the front end of the outer peripheral surface of the power transmission system. Have. In a second subordinate aspect of the first invention,
A disk portion of the large pulley is fastened to an outer peripheral portion of a front end face of a torque converter forming the power transmission system .

A torque transmitting mechanism for a vehicular rotating electric machine according to a second aspect of the present invention includes a large pulley connected to a crankshaft of a vehicular engine and a rotating shaft of the vehicular rotating electric machine fastened to a support mount by a fastening mechanism. In a torque transmission mechanism for a rotating electric machine for a vehicle, comprising: a small pulley fixed and belt-coupled to the large pulley; and an idle pulley for adjusting the tension of the belt, the idle pulley rotates on a housing of the rotating electric machine for a vehicle. It is characterized by being freely supported.

[0011] In a first dependent aspect of the second invention, the fastening mechanism is opened to at least one of the mount and the housing, and the housing for the mount in a direction in which the idle pulley changes the tension of the belt. A long hole that allows relative rotation of A torque transmitting mechanism for a rotating electric machine for a vehicle according to a third aspect of the present invention includes a large pulley connected to a crankshaft of a vehicle engine and a rotating shaft of the rotating electric machine for a vehicle fastened to a support mount by a fastening mechanism. In the torque transmitting mechanism for a rotating electric machine for a vehicle including the large pulley and a small pulley connected to a belt, the fastening mechanism is loosely fitted into both the fastening long hole of the mount and the fastening hole of the housing. A bolt screwed to the mount by a nut, and a sleeve fitted to the bolt and securing play of the housing with respect to the mount after the screwing;
An elastic ring fitted to the sleeve in the fastening hole of the housing.

In a preferred aspect of the first invention, the bell
An idle pulley for adjusting the tension of the
The idle pulley rotates on the housing of the rotating electric machine for vehicles.
Freely supported . In a preferred embodiment of the first and second inventions
The fastening mechanism may include an elongated hole for fastening the mount and
It is loosely fitted into both of the fastening holes of the housing and
A bolt screwed to the mount by a
To the mount and to the mount with respect to the mount.
A sleeve for securing the movement after the screwing of the housing;
Fitting the sleeve in the fastening hole of the housing.
And an elastic ring .

[0013]

According to the first aspect of the present invention, the large pulley on the vehicle engine side has a disk portion on its outer periphery for transmitting torque from the crankshaft to a power transmission system (for example, a torque converter, a mission or a clutch). Since it has a belt hook and operates as a large pulley, the following operational effects can be obtained. That is, conventionally, in order to transmit a torque from a crankshaft to a power transmission system (for example, a torque converter, a mission or a clutch), a disk portion (torque transmission disk plate) for transmitting torque is used between the two.

According to the present invention, a belt hooking portion is provided on the outer periphery of the disk portion for transmitting torque from the crankshaft to the power transmission system (the conventional torque transmitting disk plate is replaced with a large pulley). With this configuration, it is possible to achieve both the driving of the speed increasing belt of the rotating electric machine for the vehicle by the crankshaft and the driving of the power transmission system by an extremely simple structure, and the shaft of the power transmission system including the power transmission system and the vehicle engine. The increase in the directional dimension can be reduced.

According to the first subordinate aspect of the first invention, since the large pulley is provided with the cylindrical belt hooking portion surrounding the front end portion of the outer peripheral surface of the power transmission system, the large pulley has the same structure as the power transmission system and the vehicle engine. The axial dimension of the power system is the same as the conventional one, and there is no need to change the design (arrangement), and the power system can be connected to the vehicle rotating electrical machine at a large speed increase ratio. According to a second subordinate aspect of the first invention, the disk portion of the large pulley has the power transmission
Since it is supported by the outer peripheral portion of the front end face of the torque converter forming the system, the rigidity of the pulley is improved, and the thickness of the disk portion can be reduced.

According to the second aspect, the idle pulley is rotatably supported by the housing of the vehicular rotating electric machine.
The idle pulley can be arranged close to the rotating shaft of the rotating electric machine for vehicles and the small pulley fixed thereto irrespective of the position of the support mount and regardless of the protrusion of the housing. Can be reduced to Further, the structure and assembly are simplified.

According to the first subordinate aspect of the second invention, the vehicle rotary electric machine is rotatable with respect to the mount by the elongated hole provided in the mount or the housing. An idle pulley fixed to the housing of the rotary electric machine adjusts the belt tension. In this way, the tension can be easily adjusted, and a mount fastening seat plate that supports the idle pulley so as to be relatively displaceable with respect to the mount is not required, so that the configuration is simplified, and the strength and reliability are improved.

According to the third aspect, the bolt loosely fitted into both the long hole of the mount and the fastening hole of the housing is fastened to the mount. The sleeve fitted to the bolt is loosely fitted into both of the fastening holes of the housing, and is fastened to the mount such that it cannot be relatively displaced. Thereby, the fastening hole of the housing can be displaced relative to the mount. An elastic ring (for example, made of elastic resin or rubber) is fitted into the fastening hole of the housing, and the elastic ring is fitted to the sleeve. Thereby, the elastic ring is compressed in the tension reinforcing direction by the tension of the belt. Therefore, when the belt is loosened and the tension is reduced, the deformation of the elastic ring is recovered and the belt is pulled, thereby reducing the above-mentioned reduction in the tension.

This makes it possible to reduce the slack of the belt with a simple structure, and is particularly effective for reducing the slip of the belt in a belt drive mechanism having a large speed increase ratio. Furthermore, the effect of suppressing vibration of the rotating electric machine for a vehicle due to fluctuations in the number of revolutions can also be obtained.

[0020]

【Example】

(Embodiment 1) FIG. 1 shows a vehicle engine, a power transmission system and a vehicle generator motor to which the present invention is applied. The front end opening of the gear casing 2 is tightly fixed to the rear end face 10 of the vehicle engine 1 schematically shown, and the crankshaft 11 is slightly inserted into the gear casing 2 from the rear end face 10 of the vehicle engine 1. It is protruding. A disk portion 31 (particularly, a boss portion) of the large pulley 3 is fastened to the rear end surface of the crankshaft 11 by a bolt 32, while an outer peripheral portion of the disk portion 31 is torque-converted by a bolt 33 (power in the present invention). (Transmission system) 4.

A belt hook 34 is integrally formed on the outer periphery of the disk portion 31 of the large pulley 3, and the belt 9 is hooked on the belt hook 34. Here, the inner diameter of the belt hook portion 34 is designed to be slightly larger than the outer diameter of the torque converter 4, so that the belt hook portion 34 is attached to the front end face of the torque converter 4 or the rear end face of the vehicle engine 1. You do not need to be concerned about interference. Further, since the outer diameter of the belt hook portion 34 is smaller than the inner diameter of the gear casing 2, the belt hook portion 34 is accommodated in the gear casing 2.

A mount 20 integrally formed with the gear casing 2 is erected from the upper portion of the outer peripheral surface of the gear casing 2. A housing 60 of the vehicle generator motor 6 is fastened to the mount 20 by a fastening mechanism C described later. Fixed. The housing 60 rotatably supports the rotating shaft 61, and the small pulley 7 is fitted and fixed to the front end of the rotating shaft 61.

The housing 60 has an idle shaft 62
The idle pulley 8 is rotatably fitted to the front end of the idle shaft 62. A belt 9 is wound around the large pulley 3, the small pulley 7, and the idle pulley 8. Next, the above-described fastening mechanism C will be described with reference to FIGS. The mount 20 has a rotating shaft 6
Three elongated holes 21 are penetrated in the axial direction while being curved in the circumferential direction around the axis of the rotating shaft 61 at substantially equal diameter positions about the one axis. Similarly, three pairs of fastening holes 63 are formed in the housing 60 of the vehicular generator motor 6 in the axial direction, and each fastening hole 63 can overlap with each of the long holes 21.

More specifically, as shown in FIG. 1, the fastening holes 63 have the same axial center for each pair, and are arranged at predetermined intervals (the thickness of the mount 20) in the front and rear directions in the axial direction. ing. An elastic ring 64 made of rubber is fitted into these three pairs of fastening holes 63.
A sleeve 65 made of metal is fitted in each of the sleeves 4. Further, the bolt 66 is connected to each sleeve 65 and the long hole 2.
The housing 60 and the mount 20 are fastened and fixed by screwing the bolt 66 into a nut 67 (or a screw hole provided in the sleeve 65).

FIG. 2 is a front view showing the vicinity of the generator motor 6 before the belt 9 is stretched, and FIG.
FIG. 2 is a front view of the vicinity of the vehicle generator motor 6 in a state after the vehicle is stretched. When the housing 60 of the vehicular generator motor 6 is rotated counterclockwise from the position shown in FIG. 2 around the substantially axial center thereof with the bolt 66 loosened, the idle 60 fixed to the housing 60 in a freely rotatable manner. The pulley 8 also rotates counterclockwise, and the idle pulley 8 tightens the belt 9 to increase the tension of the belt 9. of course,
If the rotation is performed in the opposite direction, the tension is reduced.

That is, according to this embodiment, the mount 20
The tension can be adjusted by the idle pulley 8 only by providing the elongated hole 21 in the hole 20, and the idle pulley 8 does not need to be fastened to the mount 20 so as to be relatively displaceable, and the structure is extremely simple. Further, since the idle pulley 8 is supported by the housing 60, the idle pulley 8 can be disposed axially forward of the front end surface of the housing 60. Since the presence of 60 does not interfere, the idle pulley 8 is brought close to the small pulley 7 to increase the belt contact angle (belt winding angle) with the small pulley 7,
Slip can be reduced.

That is, in this embodiment, since the idle pulley 8 is disposed close to the small pulley 7, the small pulley 7
Even if a large speed increase ratio is realized by reducing the diameter, the contact length between the small pulley 7 and the belt can be ensured, and an excellent effect that slip can be reduced can be achieved. Further according to this embodiment,
By tightening the bolt 66 with a nut or the like, the bolt 6
6 is fixed to the mount 20 through the sleeve 65, and the position of the bolt 66 in the elongated hole 21 is fixed.
The fastening hole 63 of the housing 60 of the vehicle generator motor 6 is displaceable by deforming the elastic ring 64.

Therefore, as shown in FIG. 3, when the housing 60 is rotated in a direction for applying tension to the belt 9,
The elastic ring 64 is deformed by the reaction. FIG.
(B) shows a deformed state of the elastic ring 64. In this way, if the tension is reduced due to the loosening of the belt 9 or the like, the elastic ring 64 is restored and the housing 60 is rotated in the direction of the arrow shown in FIG. 8 rotates in the tension strengthening direction, and the decrease in tension is reduced.

FIG. 4 is an experimental characteristic diagram showing the relationship between the pulley ratio, the physical size of the vehicle generator motor 6 and the slip limit torque. It can be seen that the larger the pulley ratio (speed increase ratio), the smaller the physique, but the lower the limit torque. For example, in order to realize a pulley ratio of 3 for downsizing, a large pulley diameter of about φ300 is required. (Embodiment 2) Another embodiment is shown in FIG.

In this embodiment, the housing 60 of the vehicular generator motor 6 is configured to be rotatable about a bolt 66a. In this way, one long hole 21 of the mount 20 can be converted into a circular hole.

[Brief description of the drawings]

FIG. 1 is an axial cross-sectional side view of an apparatus according to a first embodiment.

2 (a) is a front view of the vicinity of the vehicle generator motor 6 of FIG. 1 before belt tensioning, and FIG. 2 (b) is an enlarged view of a Q portion thereof.

3 (a) is a front view of the vicinity of the vehicular generator motor 6 of FIG. 1 after the belt is tensioned, and FIG.

FIG. 4 is an experimental characteristic diagram showing a relationship between a pulley ratio, a physique of a vehicle generator motor 6, and a slip limit torque.

FIG. 5 is a front view of the vicinity of the vehicular generator motor 6 of FIG.

[Explanation of symbols]

1 is a vehicle engine, 4 is a torque converter (power transmission system), 3 is a large pulley, 7 is a small pulley, 8 is an idle pulley, 11 is a crankshaft, 20 is a mount, 21 is a long hole,
31 is a disk part, 34 is a belt hanging part, 61 is a rotating shaft, 6
4 is an elastic ring, 65 is a sleeve, 66 is a bolt, and C is a fastening mechanism.

Claims (8)

(57) [Claims] 1. A large pulley interposed between a rear end of a crankshaft of a vehicle engine and a power transmission system driven by the crankshaft, and fastened and supported on a support mount by a fastening mechanism. A small pulley fixed to a rotating shaft of a vehicular rotating electric machine and belt-coupled to the large pulley, and a disk portion of the large pulley is fixed to the crankshaft and the power transmission system and is separated from the crankshaft. A torque transmission mechanism for a rotating electric machine for a vehicle, comprising a torque transmission plate that transmits torque to the power transmission system. 2. The vehicle rotation system according to claim 1, wherein said large pulley has a tubular belt hooking portion formed on an outer periphery of said disk portion and surrounding a front end of an outer peripheral surface of said power transmission system. Electric motor torque transmission mechanism. 3. The power transmission system according to claim 3, wherein the disk portion of the large pulley is
The torque converter of the front surface peripheral portion according to claim 1, wherein the torque transmission mechanism of a vehicle rotary electric machine is fastened to forming the. 4. A large pulley connected to a crankshaft of a vehicle engine, and a small pulley fixed to a rotating shaft of a vehicular rotating electric machine fastened to a supporting mount by a fastening mechanism and belt-coupled to the large pulley. A torque transmission mechanism for a rotating electric machine for a vehicle, comprising a pulley and an idle pulley for adjusting the tension of the belt, wherein the idle pulley is rotatably supported by a housing of the rotating electric machine for a vehicle. Torque transmission mechanism for rotating electric machines. 5. An elongated hole opened in at least one of the mount and the housing to allow a relative rotation of the housing with respect to the mount in a direction in which the idle pulley changes a tension of the belt. The torque transmission mechanism for a rotating electric machine for a vehicle according to claim 4, comprising: 6. A small pulley connected to a crankshaft of a vehicle engine and a small pulley fixed to a rotating shaft of a rotating electric machine for a vehicle, which is fastened to a supporting mount by a fastening mechanism, and belt-connected to the large pulley. In the torque transmitting mechanism for a rotating electric machine for a vehicle including a pulley, the fastening mechanism is loosely fitted into both the fastening long hole of the mount and the fastening hole of the housing, and is screwed to the mount by a nut. A bolt, a sleeve fitted to the bolt and securing the housing after the screwing of the housing with respect to the mount, and an elastic ring fitted to the sleeve in the fastening hole of the housing. Rotating electric machine for vehicles characterized by the following
Torque transmission mechanism . 7. A torque transmission for a vehicular rotating electric machine according to claim 1.
In reach mechanism, Bei idle pulley for tension adjustment of the belt
The idle pulley is a housing of the rotating electric machine for a vehicle.
Vehicle rotation characterized by being rotatably supported by the bearing
Torque transmission mechanism of a rotary electric machine. 8. The electric rotating machine for vehicles according to claim 1 or 4.
In the torque transmission mechanism, the fastening mechanism includes a slot for fastening the mount and the slot.
Both nuts are loosely fitted into both of the fastening holes in the housing.
A bolt screwed into the mount by the
And the housing against the mount
A sleeve for ensuring free movement after the screwing of the ring,
Fit into the sleeve in the fastening hole of the housing
An electric rotating machine for a vehicle, comprising: an elastic ring.
Torque transmission mechanism.