JP2002333060A - Built-in one-way clutch type pulley device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost by simplifying the assembling work of a pair of support bearings 27, 27 between a cylindrical part 40 of a first pulley member 34 and a sleeve 20a. SOLUTION: The sleeve 20a and a second pulley member 36 are separately formed. Inner rings of the support bearings 27, 27 are press-fitted to the sleeve 20a before the second pulley member 36 is connected to the sleeve 20a. As the press-fitting work can be performed without being disturbed by the second pulley member 36, the purpose can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A pulley device with a built-in one-way clutch according to the present invention automatically stops an engine without idling when a vehicle is stopped.
It is incorporated in a so-called idling stop car to drive auxiliary equipment such as a compressor for an air conditioner. In particular, the pulley device with a built-in one-way clutch of the present invention is configured to continue the operation of the auxiliary machine even when the engine is stopped based on the idling stop function.

[0002]

2. Description of the Related Art Auxiliary equipment for an automobile is rotationally driven by a traveling engine of the automobile via a belt drive mechanism.
FIG. 4 shows an example of a conventional structure of an auxiliary machine driving device for an automobile, which rotates an auxiliary machine in this way. This vehicle accessory drive device includes a plurality of accessories 2 to 5 such as an alternator 2, a pump 3 for a power steering device, a compressor 4 for an air conditioner, a cooling fan device 5, and the like near an engine 1. Of the auxiliary devices 2 to 5 can be driven to rotate by one endless belt 6.

That is, a first driving pulley 8 fixed to an end of a crankshaft 7 of the engine 1 and a driven pulley 1 fixed to ends of driven-side rotating shafts 9 and 9 of the respective auxiliary machines 2 to 5.
The endless belt 6 is stretched between 0 and 10. Then, the rotation of the first driving pulley 8 based on the rotation of the crankshaft 7 is transmitted to the driven pulleys 10 and 10 via the endless belt 6, and the driven-side rotations of the auxiliary machines 2 to 5 are transmitted. The shafts 9 and 9 are rotatably driven. or,
In the illustrated example, an auto-tensioner 11 for applying an appropriate tension to the endless belt 6 and a traveling position of the endless belt 6 are provided between the first driving pulley 8 and the driven pulleys 10 and 10. An idle pulley 12 for adjustment is provided.

[0004] The structure and operation of the auxiliary drive device for an automobile are as described above. However, in recent years, in order to save energy and suppress the emission of carbon dioxide, the engine is automatically stopped without idling the engine when the automobile is stopped. It is considered that the vehicle is stopped or idling stop is performed. In some cases, an idling stop vehicle having such an idling stop function is actually used. In the case of such an idling stop vehicle, when the vehicle stops, the engine is automatically stopped (without operating the ignition switch) based on the signal of the vehicle speed detected by the vehicle speed sensor. On the other hand, when the vehicle is restarted, a clutch sensor for detecting the movement of the clutch pedal (in the case of a manual transmission) or an accelerator sensor for detecting the operation of the accelerator pedal (in the case of an automatic transmission) is used. Based on the signal, the vehicle engine is automatically restarted (also without operating the ignition switch).
According to such an idling stop vehicle, energy saving and suppression of carbon dioxide emission can be achieved by the idling stop of the engine.

[0005] However, the following inconvenience arises when the conventional vehicle accessory drive device as shown in FIG. 4 is mounted on an idling stop vehicle as described above. That is, in the case of the idling stop vehicle described above, the engine 1 also stops when the vehicle stops running.
The operations of ~ 5 are also stopped. In particular, when the air conditioner compressor 4 of these auxiliary machines 2 to 5 is stopped, it becomes impossible to perform cooling or the like in the passenger compartment. As a result, in a summer season or the like, it may not be possible to maintain the comfort in the vehicle interior satisfactorily, which is not preferable.

[0006]

[Description of the Prior Invention] In view of such circumstances, even when the engine is stopped based on the idling stop function,
2. Description of the Related Art Auxiliary device driving devices for automobiles, such as a compressor for an air conditioner, capable of continuously operating the auxiliary devices have been considered. FIGS. 5 to 7 show an example of such an auxiliary drive device for an automobile, as disclosed in Japanese Patent Application No. 2000-39.
4 shows an example of the structure described in No. 4776.

In the case of the accessory driving apparatus for an automobile according to the prior invention shown in FIGS. 5 to 7, an alternator 2, a pump 3 for a power steering device, and an air conditioner, each of which is an accessory for an automobile. Of the compressor 4 for cooling and the cooling fan device 5, only the compressor 4 for air conditioner
3 so as to rotate. The alternator 2, the power steering device pump 3, and the cooling fan device 5, which are other automotive accessories, are all stopped when the engine 1 is stopped. Of these, the pump 3 for the power steering device and the cooling fan device 5 are unnecessary when the engine is stopped. Further, when the alternator 2 is driven in rotation by the electric motor 13 in consideration of the transmission efficiency of the driving force, the power generation efficiency, and the like, it causes the battery to be consumed more quickly.

Therefore, in the case of the structure shown in FIGS. 5 to 7, the driven side rotating shaft 9 of the alternator 2, the pump 3 for the power steering device, and the cooling fan device 5 is used.
A driven pulley 10 for hanging a first endless belt 14 to be described later is fixed to an end of the driven pulley 10. A plurality of auxiliary devices 2 to 5 such as an alternator 2, a pump 3 for a power steering device, a compressor 4 for an air conditioner, and a cooling fan device 5 are provided near the engine 1 and the electric motor 13 provided adjacent to each other. Each of these auxiliary devices 2 to 5 is rotatably driven by the engine 1 or the electric motor 13. In particular, the air conditioner compressor 4 of each of the accessories 2 to 5 is rotatable by the engine 1 when the engine 1 is operating and by the electric motor 13 when the engine 1 is stopped. On the other hand, the alternator 2
The power steering device pump 3 and the cooling fan device 5 are rotatable only by the engine 1. Therefore, each of the auxiliary machines 2, 3, and 5 stops when the engine 1 stops. However, as for the power steering device pump 3, in the case of a vehicle that runs even when the engine is stopped, such as a hybrid vehicle that runs at a low speed by an electric motor, it is preferable to rotate the drive even when the engine is stopped. In some cases.

As described above, the air conditioner compressor 4 is rotatably driven by the engine 1 when the engine 1 is operated and by the electric motor 13 when the engine 1 is stopped. At the end of the driven side rotating shaft 9 of the compressor 4,
The first driven pulley 15 which is a first pulley member described in the claims, and the second driven pulley 1 which is also a second pulley member
6 is provided. Further, a second drive pulley 17 is provided at an end of the drive-side rotating shaft 37 of the electric motor 13.
The first endless belt 14 is bridged between the first driven pulley 15 and the first drive pulley 8 fixed to an end of the crankshaft 7 of the engine 1 and rotating and stopping together with the crankshaft 7. . The first endless belt 14 is stretched over the driven pulley 10 fixed to the end of the driven side rotation shaft 9 of each of the auxiliary machines 2, 3, and 5, in addition to the first driven pulley 15. On the other hand, the second drive pulley 17
A second endless belt 18 is stretched between the second driven pulley 16 and the second driven pulley 16.

A drive-side clutch 1 is provided between the drive-side rotating shaft 37 of the electric motor 13 and the second drive pulley 17.
9 are provided. The drive-side clutch 19 is connected only when the drive-side rotation shaft 37 rotates, such as a centrifugal clutch or a one-way clutch, and transmits power from the drive-side rotation shaft 37 to the second drive pulley 17. Has functions. That is, the drive-side clutch 19 is connected when the drive-side rotating shaft 37 rotates with the energization of the electric motor 13, and drives the second drive pulley 17 to rotate. On the other hand, when the drive-side rotating shaft 37 is stopped, the drive-side clutch 19 is not engaged regardless of the rotation of the second drive pulley 17. Does not rotate.

On the other hand, the first driven pulley 15 and the second driven pulley 16 are combined as shown in FIG. 7 to form the driven side rotating shaft 9 of the air conditioner compressor 4.
At the end. Of these, the second driven pulley 16
Are fixed to the end of the driven-side rotating shaft 9 so as to rotate and stop together with the driven-side rotating shaft 9. For this reason, in the illustrated example, the second driven pulley 16 is placed around the outer end of the cylindrical sleeve 20 (an end farther from the front surface of the engine 1 and the left end in FIG. 7). And is provided integrally. The inner peripheral surface of the sleeve 20 is an inner end side (an end side near the front surface of the engine 1 and a right end side in FIG. 7).
, The cylindrical surface portion 21, the female screw portion 22, and the hexagonal hole portion 23 are provided concentrically and serially in the axial direction. The sleeve 20 having such an inner peripheral surface is formed by screwing the female screw portion 22 into a male screw portion formed at the end of the driven rotation shaft 9, thereby forming the driven rotation shaft 9. Secure to the end. In this state, the cylindrical surface portion 21 is fitted by an interference fit with a cylindrical surface portion formed at a portion closer to the center than the male screw portion at an intermediate portion of the driven-side rotating shaft 9. Therefore, the sleeve 20
Is supported and fixed to the end of the driven side rotating shaft 9 without rattling. The hexagonal hole 23 has the female screw 2
The end of the tool for screwing 2 and the male screw is engaged.

On the other hand, the first driven pulley 15 is supported around an end of the driven rotary shaft 9 via a driven clutch 24, which is a one-way clutch described in the claims. . For this purpose, a cylindrical portion 25 is formed at the inner peripheral edge of the first driven pulley 15, and the inner peripheral surface of the cylindrical portion 25 and the outer peripheral surface of the sleeve 20 are used to form the second driven pulley 1.
The driven-side clutch 24 and a pair of support bearings 27 are provided between the ring-shaped portion 6 and a portion of the driven-wheel clutch 26 that is separated from the ring portion 26. The driven clutch 24 transmits torque from the first driven pulley 15 to the sleeve 20, but does not transmit torque from the sleeve 20 to the first driven pulley 15.

In the case of the example shown in the figure, a roller clutch is used as the driven clutch 24. A pair of support bearings 27 are provided on both sides of the driven clutch 24, each of which is a deep groove type ball bearing. The driven clutch 24 includes a clutch inner ring 28, a clutch outer ring 29, and a plurality of rollers 30.
, A retainer 31 and a spring (not shown). Of these, the clutch inner ring 28 is fitted and fixed to the outer peripheral surface of the intermediate portion of the sleeve 20, and the outer ring 29 for clutch is fixed to the inner peripheral surface of the intermediate portion of the cylindrical portion 25 by interference fit. The inner peripheral surface of the clutch outer race 29 is a simple cylindrical surface, and the outer peripheral surface of the clutch inner race 28 is a cam surface 32. That is, this clutch inner ring 2
A plurality of cam recesses, each called a ramp portion, are formed at equal intervals in the circumferential direction on the outer peripheral surface of the inner ring 8, and the outer peripheral surface of the clutch inner ring 28 is the cam surface 32.

The outer peripheral edges of the seal rings 33, 33 are engaged with opposite ends of the outer races constituting the support bearings 27, 27, respectively. The inner and outer spaces of the support bearings 27, 27 and the driven clutch 24 are shut off by the two seal rings 33, 33. If the type of lubricating oil suitable for lubricating each of the support bearings 27 is different from the type of lubricating oil suitable for lubricating the driven clutch 24, the above-described support bearing 2 may be used.
The outer peripheral edge of the seal ring is attached to both ends of the outer ring constituting each of the support bearings 27, 27, and these support bearings 27, 2
7 and the driven side clutch 24 can be disconnected.

Further, between the cam surface 32 and the inner peripheral surface of the clutch outer ring 30, the plurality of rollers 30 and these rollers 30 are rolled and freely displaceable in the circumferential direction. The above-mentioned retainer 31 for supporting is provided. The retainer 31 has its inner peripheral edge engaged with a part of the cam surface 32 to prevent relative rotation with respect to the clutch inner ring 28. On the other hand, a gap is provided between the outer peripheral edge of the retainer 31 and the inner peripheral surface of the clutch outer ring 29. A spring (not shown) is provided between the retainer 31 and the rollers 30 to press the rollers 30 in the same circumferential direction (the direction in which the cam recesses become shallower). . Although the structure and operation of the driven clutch 24, which is such a roller clutch, are well known, in the present embodiment, the driven clutch 24 is
5 transmits the torque to the sleeve 20, but does not transmit the torque from the sleeve 20 to the cylindrical portion 25.

The pair of support bearings 27, 27
Are mounted at positions between the inner peripheral surface of the cylindrical portion 25 and the outer peripheral surface of the sleeve 20 at positions sandwiching the driven clutch 24 from both axial sides. Each of these support bearings 27 supports a radial load applied to the first driven pulley 15 from the first endless belt 14 to prevent breakage of the driven clutch 24,
When the driven clutch 24 is overrun, the relative rotation of the first driven pulley 15 and the sleeve 20 is allowed.

In the case of the accessory driving apparatus for an automobile according to the present embodiment having the structure described above, when the engine 1 is operated, the rotational force of the crankshaft 7 is applied to the first driving pulley 8 and the first endless belt 14. Through the first driven pulley 15. The rotation of the first driven pulley 15 is transmitted to the driven side rotation shaft 9 of the air conditioner compressor 4 via the driven side clutch 24 and the sleeve 20, and the driven side rotation shaft 9 of the air conditioner compressor 4 is driven. The side rotation shaft 9 is driven to rotate. In this state, the alternator 2, the pump 3 for the power steering device, and the cooling fan device 5 are also rotationally driven as the first endless belt 14 travels. Further, the electric motor 13 is stopped, and the driving side clutch 19 remains disconnected, so that the electric motor 13 is driven to rotate even if the second drive pulley 17 rotates. Nothing. Therefore, even if the electric motor 13 is provided, the load on the engine 1 hardly increases.

On the other hand, when the engine 1 is stopped based on the idling stop function, the electric motor 13 is operated, and the drive-side rotating shaft 37 of the electric motor 13 rotates. As a result, the drive-side clutch 19 is connected, and the rotation of the drive-side rotary shaft 37 is transmitted to the second drive pulley 17. Then, the rotation of the second driving pulley 17 is transmitted to the second driven pulley 16 fixed to the driven-side rotation shaft 9 via the second endless belt 18 to rotate the driven-side rotation shaft 9. I do.
Therefore, the engine 1 based on the idling stop function
When the air conditioner compressor 4 is stopped, the inconvenience such as the inability to perform cooling in the vehicle cabin does not occur.

In the state where the air conditioner compressor 4 is rotationally driven by the electric motor 13, the driven side provided between the driven side rotating shaft 9 and the first driven pulley 15 is driven. The clutch 24 is disconnected. For this reason, the first driven pulley 15 is moved from the driven-side rotating shaft 9 that is rotationally driven by the electric motor 13.
Does not transmit torque. Therefore, the electric motor 13
When the second endless belt 18 is run on the basis of the rotation of the drive-side rotating shaft 37, the first endless belt 14 and the first endless belt 14 that are stretched over the first driven pulley 15 are stretched. The crankshaft 7 does not rotate through the first drive pulley 8. Therefore, the load on the electric motor 13 can be reduced to the extent that the crankshaft 7 does not rotate.

Further, in the case of the accessory driving apparatus for an automobile according to the present embodiment, the compressor for an air conditioner, which needs to continue the operation even when the engine 1 is stopped, among the plurality of accessories 2-5. 4 (or, if necessary, the pump 3 for the power steering device) is rotated by the electric motor 13 and may be stopped when the engine 1 is stopped. The alternator 2, the pump 3 for the power steering device, The cooling fan device 5 is not driven to rotate by the electric motor 13. Therefore, this electric motor 13
The air conditioner compressor 4 needs only to be small enough to rotate and drive, and the consumption of the battery while the engine 1 is stopped can be reduced.

[0021]

In order to realize an auxiliary device driving device for driving an auxiliary device such as a compressor for an air conditioner at a low cost, which is incorporated in an idling stop vehicle as described above, the components of the components are required. It is important to reduce costs. For example, a pulley device with a built-in one-way clutch, which is a unit formed by combining first and second driven pulleys 15 and 16 over which the first endless belt 14 is wound, a driven clutch 24 and a pair of support bearings 27 and 27. In consideration of the above, the structure is not necessarily low-cost. The reason is as follows.

That is, the pair of support bearings 27, 27
Among them, the inner ring of the support bearing 27 provided on the circular ring portion 26 side (left side in FIG. 7) of the second driven pulley 16 is tightly fitted to the sleeve 20 integrally provided on the inner peripheral edge portion of the second driven pulley 16. The press-fitting distance becomes longer for the outer fitting. In order to prevent creep, of the inner ring and the outer ring constituting each of the support bearings 27, 27, the inner ring is fitted to the sleeve 20 by interference fit, and the outer ring is fitted to the inner peripheral edge of the first driven pulley 15. It is necessary to fit the cylindrical portion 25 provided therein by interference fit. In this case, the support bearing 2 on the side of the annular portion 26 is used.
The operation of tightly fitting the outer ring 7 to the cylindrical portion 25 and tightly fitting the inner ring of the support bearing 27 to the sleeve 20 is very troublesome and costly.

For example, if the outer diameter of the portion on the circular ring portion 26 side of the sleeve 20 is made larger than the outer diameter of the other portion, the press-fit distance of the support bearing 27 provided on the circular ring portion 26 side with respect to the inner ring. Can be shortened, but a pair of support bearings 27, 27 having different specifications must be used, which also increases the cost. In addition, with the outer ring of the support bearing 27 on the side of the circular ring portion 26 still fitted inside the cylindrical portion 25 by interference fit, the inner ring of the support bearing 27 is attached to the end of the sleeve 20 on the circular ring portion 26 side. The operation of externally fitting by interference fit is performed by the driven clutch 24 described above.
The assembly work is troublesome, for example, it is necessary to carry out before mounting. As a pulley device with a built-in one-way clutch that can be incorporated in an auxiliary drive device for an automobile applied to an idling stop vehicle, a pulley device described in Japanese Patent Application Laid-Open No. 10-18429 is known. 1
Only, and the clutch inner ring and the support bearing inner ring are integrated. In addition, since the pulley and the sleeve are integrated, if a pair of support bearings are provided, the same problem as that shown in FIG. 7 occurs. In view of such circumstances, the present invention has been made to reduce the cost of a pulley device with a built-in one-way clutch by facilitating assembly work.

[0024]

According to the present invention, there is provided a pulley device with a built-in one-way clutch, comprising: a sleeve; a first pulley member;
The vehicle includes a one-way clutch, a pair of support bearings, and a second pulley member. Of these, the sleeve is externally fitted and fixed to the rotating shaft and has a cylindrical shape. Further, the first pulley member is provided with a first pulley groove portion on an outer peripheral edge portion and a cylindrical portion on an inner peripheral edge portion over the entire circumference, and is disposed concentrically with the sleeve around the sleeve. ing. The one-way clutch is provided between an outer peripheral surface of the sleeve and an inner peripheral surface of the cylindrical portion. Further, the pair of support bearings is provided at a position sandwiching the one-way clutch from both axial sides between the peripheral surfaces. Further, the second pulley member is formed separately from the sleeve, has a second pulley groove at an outer peripheral edge, and connects an inner peripheral edge to a portion protruding from the cylindrical portion at an end of the sleeve. Fixed.

[0025]

In the pulley apparatus with a built-in one-way clutch of the present invention constructed as described above, since the second pulley member and the sleeve are separate bodies, the inner ring constituting the support bearing is tightly fitted to this sleeve. The work of externally fitting can be performed without being hindered by the second pulley member. Because of this,
Even if a pair of support bearings having the same specifications are used, an operation of assembling these two support bearings between the outer peripheral surface of the sleeve and the inner peripheral surface of the cylindrical portion provided on the inner peripheral edge of the first pulley member. Can be easily performed.

[0026]

FIG. 1 shows a first embodiment of the present invention.
An example is shown. The pulley device with a built-in one-way clutch of the present invention includes a sleeve 20a, a first pulley member 34, a one-way clutch 35, and a pair of support bearings 27, 27.
And a second pulley member 36. The sleeve 20a is externally fitted and fixed to the rotating shaft 38, and has a cylindrical shape. When the present invention is applied to the accessory driving device for an automobile as shown in FIGS. 5 and 6 described above, the rotating shaft 38 is mounted on the compressor 4 for the air conditioner (or the pump 3 for the power steering device). Drive side rotating shaft 9 (FIGS. 5 to 6)
Reference).

The first pulley member 34 is formed into a whole ring shape by pressing a carbon steel such as an SC material or by turning a bearing steel such as a SUJ material. And a first pulley groove 39 provided on the outer peripheral edge.
And a cylindrical portion 40 provided on the inner peripheral edge portion thereof by a circular plate-shaped connecting plate portion 41. A through hole 42 for reducing the weight is formed in the connecting plate portion 41 to reduce the inertial mass of the first pulley member 34. Such a first pulley member 34 is arranged around the sleeve 20a and concentrically with the sleeve 20a. Note that, when the present invention is applied to the accessory driving device for an automobile as shown in FIGS. 5 and 6, the first pulley member 34 is the first driven pulley 15 (see FIGS. 5 and 6).

The one-way clutch 35 is provided between the inner peripheral surface of the sleeve 20a and the inner peripheral surface of the cylindrical portion 40, and transmits the rotation of the cylindrical portion 40 to the sleeve 20a. However, the sleeve 20a has a function of not transmitting the rotation of the sleeve 20a to the cylindrical portion 40 (assembled in that direction). As such a one-way clutch 35, a cam clutch such as a roller clutch or a sprag clutch incorporated as the driven-side clutch 24 according to the above-described vehicle accessory driving device according to the prior invention is used.

The pair of support bearings 27, 27
Is provided at a position sandwiching the one-way clutch 35 from both sides in the axial direction between the inner peripheral surface of the sleeve 20a and the inner peripheral surface of the cylindrical portion 40. Such a support bearing 2
7 and 27 use single row deep groove type ball bearings as shown in FIG. 7 described above, similarly to those incorporated in the above-mentioned automotive accessory drive device according to the prior invention. Then, the outer ring constituting each of the support bearings 27, 27 is connected to the cylindrical portion 40.
Of the sleeve 20a, and the inner ring is externally fixed to both ends of the sleeve 20a by interference fit.
Note that, in the illustrated example, the portions of both ends of the cylindrical portion 40 where the outer rings of the support bearings 27 and 27 are fitted are slightly larger in diameter than the intermediate portion where the one-way clutch 35 is provided. The inner race of one (the right side in FIG. 1) of the support bearing 27 is externally fitted and fixed to the middle portion of one end (the right end in FIG. 1) of the sleeve 20a. In other words, one end of the sleeve 20a is connected to the one support bearing 2.
7 is slightly protruded from the inner ring.

Further, the second pulley member 36 is formed separately from the sleeve 20a. Similarly to the first pulley member 34, the second pulley member 36
Press working on carbon steel such as
By turning a bearing steel such as J material, the whole is formed into a ring shape, and a second pulley groove portion 44 is provided on the outer peripheral edge of the ring-shaped connecting plate portion 43. The connecting plate portion 43 also has a through hole 42 for reducing the weight. A hub 45 having a large axial dimension is formed on the inner peripheral edge of the connecting plate 43. The hub 45 is connected to the sleeve 20a.
Is externally fitted and fixed to a portion protruding from the cylindrical portion 40 at one end. That is, one end of the sleeve 20a is connected to the one support bearing 2 provided at one end of the cylindrical portion 40.
7 protrudes in the axial direction from the inner ring. Hub part 45
Has a stepped shape in which a large-diameter portion 46 and a small-diameter portion 47 are connected by a step portion 48. Of these, the large-diameter portion 4
6 is externally fitted to one end of the sleeve 20a by interference fit. In this state, the step portion 48 abuts against one end surface of the sleeve 20a, and the small diameter portion 47 does not protrude radially inward from the inner peripheral surface of the sleeve 20a.

In the illustrated example, the second pulley member 3
6 and the first pulley member 34 have the same outer diameter. However, the outer diameters of the two pulley members 36 and 34 are the same as those of the sleeve 20 required when idling is stopped.
a, and the outer diameter of the first drive pulley 8 provided at the end of the crankshaft 7 and the outer diameter of the second drive pulley 17 (see FIG. 5) provided at the end of the drive-side rotary shaft 37 of the electric motor 13. Determined by design. Therefore, the two pulley members 36, 3
The outer diameter of 4 may be made different as shown in FIG.

In the case of the pulley device with a built-in one-way clutch of the present invention configured as described above, the second pulley member 3
6 and the sleeve 20a are separated from each other, so that the work of fixing the inner races constituting the support bearings 27 and 27 to both ends of the sleeve 20a by interference fit is prevented by the second pulley member 36. Can be done without. That is, before assembling the second pulley member 36 to one end of the sleeve 20a, the support bearings 27, 27 are placed between the outer peripheral surfaces at both ends of the sleeve 20a and the inner peripheral surfaces at both ends of the cylindrical portion 40. Assemble. This assembling work
The inner ring of each of the support bearings 27
The outer ring is similarly press-fitted from both ends of the cylindrical portion 40 from both ends of the cylindrical portion 40a. In this case, the press-fitting length can be short for both the inner ring and the outer ring, so that the work of assembling the support bearings 27 can be easily performed. Of course, the one-way clutch 35
Prior to assembling at least one of the support bearings 27 of the support bearings 27, 27, the support bearing is assembled between the outer peripheral surface of the intermediate portion of the sleeve 20a and the inner peripheral surface of the intermediate portion of the cylindrical portion 40.

Since the work of assembling the support bearings 27, 27 can be performed as described above, even if the pair of support bearings 27, 27 have the same specifications, they can be used. The work of assembling between the outer peripheral surface of the sleeve 20a and the inner peripheral surface of the cylindrical portion 40 provided on the inner peripheral edge of the first pulley member 34 can be easily performed. Incidentally, the second pulley member 36 is, as described above,
Around the sleeve 20a, support bearings 27, 27
After the one-way clutch 35 and the first pulley member 34 are assembled, they are fixedly connected to one end of the sleeve 20a.

Next, another example of the structure of the portion for connecting and fixing the hub 45 provided on the inner peripheral edge of the second pulley member 36 to one end of the sleeve 20a will be described with reference to FIG. First, in the structure shown in FIG. 2A, one end of the sleeve 20a has a stepped shape, and a portion protruding in the axial direction from the hub portion 45 at one end of the sleeve 20a is spread radially outward. The caulked portion 49 is formed by plastic deformation in the direction. The swaged portion 49 holds down the hub 45 toward the sleeve 20a. Next, the structure shown in FIG.
Is formed in a stepped shape, and not only the large-diameter portion 46 on the inner peripheral surface of the hub portion 45 but also the small-diameter portion 47 are fitted to the sleeve 20a by interference fit. Further, FIG.
The structure shown in (C) is a state in which one end of the sleeve 20a is stepped, and the large diameter portion 46 and the small diameter portion 47 on the inner peripheral surface of the hub 45 are externally fitted to the sleeve 20a.
The hub portion 45 and the sleeve 20a are connected and fixed by welding 50.

Next, the structure of the portion for connecting and fixing the one-way clutch built-in pulley device of the present invention to the tip of the rotating shaft will be described with reference to FIG. First, in the structure shown in FIG. 3A, the other end surface of the sleeve 20a {the left end surface in FIG. 3A} is protruded from the end surface of a rotating shaft (not shown) concentrically with the rotating shaft. Hit it. Then, the bolt 51 inserted through the sleeve 20a is screwed into a screw hole formed at the center of the tip end surface of the rotating shaft, and further tightened.
The sleeve 20a is fixedly connected to the rotating shaft.
Next, the structure shown in FIG.
2 is inserted into the sleeve 20a, and a nut 53 is screwed into the male screw portion 52 protruding from the sleeve 20a, and further tightened.
0a is fixedly connected to the rotation shaft. Next, FIG.
In the structure shown in (C), the sleeve 20a is externally fitted and fixed to the end of the rotating shaft 38 by interference fit, and the large diameter of the inner peripheral surface of the hub 45 formed on the inner peripheral edge of the second pulley member 36. A portion 46 is attached to one end of the sleeve 20a by a small diameter portion 47.
The sleeve 20a and the second pulley member 36 are fixedly connected to the rotating shaft 38 by externally fitting them to the distal end of the rotating shaft 38 by interference fit. Next, FIG.
In the structure shown in (D), the large-diameter portion 46 of the inner peripheral surface of the hub 45 formed on the inner peripheral edge of the second pulley member 36 is externally fitted to one end of the sleeve 20a by interference fit, and the rotating shaft is A crimping portion 54 formed by plastically deforming a portion protruding from the sleeve 20a at the distal end portion 38 radially outward is formed by a caulking portion 54.
One end surface of the sleeve 20a is held down. In this state, the sleeve 20a is clamped between the caulking portion 54 and a step (not shown) provided at an intermediate portion between the rotating shaft 38, and is fixedly connected to the rotating shaft 38. Further, in the structure shown in FIG.
Large diameter portion 46 of the inner peripheral surface of hub 45 formed on the inner peripheral edge of
Is externally fitted to one end of the sleeve 20a by interference fit, and welding 55 is performed between the inner peripheral edge of one surface of the hub 45 and the outer peripheral edge of the distal end surface of the rotating shaft 38.
Oa and the second pulley member 36 are connected and fixed to the rotating shaft 38.

[0036]

Since the present invention is constructed and operates as described above, it is possible to reduce the manufacturing cost of the pulley device with a built-in one-way clutch and to reduce the cost of the auxiliary device driving device for an idling stop vehicle. Can contribute.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing three examples of another structure of a coupling portion between a sleeve and a second pulley member.

FIG. 3 is a partial cross-sectional view showing five examples of a coupling portion between a rotating shaft and a sleeve.

FIG. 4 is a schematic front view showing a general accessory driving device for an automobile.

FIG. 5 is a schematic front view of an accessory drive device according to the invention, developed for an idling stop vehicle.

FIG. 6 is a schematic side view for explaining the configuration of the accessory drive device.

FIG. 7 is a half sectional view showing an example of a pulley device with a built-in one-way clutch incorporated in the accessory driving device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine 2 alternator 3 pump for power steering device 4 compressor for air conditioner 5 cooling fan device 6 endless belt 7 crankshaft 8 first drive pulley 9 driven side rotating shaft 10 driven pulley 11 auto tensioner 12 idle pulley 13 electric motor 14 1st endless belt 15 1st driven pulley 16 2nd driven pulley 17 2nd drive pulley 18 2nd endless belt 19 Drive side clutch 20, 20a Sleeve 21 Cylindrical surface part 22 Female screw part 23 Hexagon hole part 24 Driven side clutch 25 Cylindrical part 26 Circular ring part 27 Support bearing 28 Clutch inner ring 29 Clutch outer ring 30 Roller 31 Cage 32 Cam surface 33 Seal ring 34 First pulley member 35 One-way clutch 36 Second pulley member 37 Drive side rotating shaft 38 Rotating shaft 39 Pulley groove part 40 Cylindrical part 41 Connecting plate part 42 Through hole 43 Connecting plate part 44 Second pulley groove part 45 Hub part 46 Large diameter part 47 Small diameter part 48 Step part 49 Caulking part 50 Welding 51 Bolt 52 Male screw part 53 Nut 54 Caulking part 55 welding

Claims (1)

[Claims] 1. A sleeve having a cylindrical shape externally fitted to and fixed to a rotating shaft, a first pulley groove on an outer peripheral edge, and a cylindrical portion on an inner peripheral edge, respectively. A first pulley member disposed concentrically with the sleeve, a one-way clutch provided between an outer peripheral surface of the sleeve and an inner peripheral surface of the cylindrical portion, and a first pulley member provided between the two peripheral surfaces. A pair of support bearings provided at positions sandwiching the one-way clutch from both sides in the axial direction; and a second pulley groove at an outer peripheral edge formed separately from the sleeve. A pulley device with a built-in one-way clutch, comprising: a second pulley member having an inner peripheral edge coupled and fixed to a portion protruding from the cylindrical portion.