JP2611991B2 - Wet clutch device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wet-type multi-plate clutch device, and more particularly to a wet-type multi-plate clutch device suitable for being applied to a device that drives a driving shaft via a pulley.

"Prior art and its problems" Clutch devices are roughly classified into dry type and wet type. The dry type has the advantage of being small, but has the problems that the durability of the clutch friction portion is poor, the connection noise and the shock are large, and foreign matter easily enters between the clutch plates. On the other hand, in the wet type, since the clutch plate is sealed in oil, the drawbacks of the dry type are eliminated to some extent. That is, the durability of the clutch friction portion is high, the connection noise is low, and the connection is smooth. However, it is difficult to meet the demand for miniaturization due to its structure, and the dimension in the axial direction is particularly large. In addition, when the operating conditions are severe, it is difficult to cool the oil and the coil, and a special cooling device is required.

[Object of the Invention] An object of the present invention is to provide a wet clutch device that can meet the demand for downsizing while maintaining the advantages of a wet clutch. Another object of the present invention is to provide a wet clutch device having excellent oil and coil heat radiation properties.

"Summary of the Invention" The present invention relates to a pulley generally used as a driving shaft,
It was completed based on the idea of using it as it is as the oil chamber housing of a wet clutch. That is, in the present invention, a pulley as a driving-side rotating body is provided on an outer peripheral portion of a driven shaft so as to be rotatable relative to the driven shaft, and the pulley, a driven shaft-side member integrated with the driven shaft, and a pulley integrated with the pulley. A drive-side clutch plate that is formed in the oil chamber with the cover and that is positioned in the oil chamber, and is supported by the pulley or the cover so as to be movable in the axial direction, and a driven shaft that can be brought into and away from the drive-side clutch plate A driven-side clutch plate supported movably in the axial direction on a side member, and an armature that can be moved in a direction in which the driven-side and driven-side clutch plates are brought closer to each other, and a pulley is provided with a driven-side and driven-side clutch plate and In correspondence with the amateur, the end of the pulley outside the non-rotating member side is formed in an annular groove that is open to the outside, and is formed in the annular groove. Flax in oil chamber Was aspirated Interview A to adhere the driving side and the driven side of the clutch plate, it is characterized in that positions the fixed coil in a non-rotating member.

"Examples of the Invention" The present invention will be described below with reference to illustrated examples. FIG. 1 shows an embodiment in which the present invention is applied to a clutch device of a compressor for a car cooler. A driven shaft 12 connected to the compressor is rotatably supported by the housing 11, and an end of the driven shaft 12 is keyed to a hob 13 and integrally connected thereto.

On the other hand, a pulley 15 located on the outer peripheral portion of the driven shaft 12 is rotatably supported by the housing 11 via a bearing 14. An oil seal 16 is provided between the pulley 15 and the hob 13.

A cover 20 is fixed to the pulley 15 via a fixing screw 18, and the cover 20, the pulley 15, and the hob 13 form an oil chamber 21. The sealing plug 19 of the oil chamber 21 is detachably provided on the cover 20.

As is apparent from the above configuration, the pulley 15 and the cover 20 constitute a driven member, and the driven shaft 12 and the hob 13 constitute a driven member. A wet clutch device located in the oil chamber 21 is provided on the driving side and driven side members.

That is, the pulley 15 is formed with a plurality of axial grooves 22 on the inner circumference of the end on the cover 20 side, and an annular driving-side clutch plate 23 is supported in the axial grooves 22 so as to be movable in the axial direction. The driving-side clutch plate 23 has a pulley 15
And rotate together. On the other hand, a plurality of axial grooves 24 are similarly formed on the outer periphery of the end of the hob 13 on the cover 20 side, and an annular driven clutch plate 25 is supported in the axial grooves 24 so as to be movable in the axial direction. Have been. This driven clutch plate 25
Rotates integrally with the hob 13 in the rotation direction. Hob 13
This is a holding member for the driven clutch plate.

The driving-side clutch plate 23 and the driven-side clutch plate 25 are alternately stacked, and an armature 26 movably supported in the axial groove 24 is located at an outer end thereof. 27
Is an amateur 26 retaining ring.

The pulley 15 is formed with an annular groove 28 whose housing (non-rotating member) 11 side is opened in accordance with the circumferential positions of the driving-side clutch plate 23, the driven-side clutch plate 25, and the armature 26, In this annular groove 28, the housing
11, a coil 30 fixed via a bracket 29 is located. The magnetic flux generated by the coil 30 is transmitted to the pulley 15 through the driving side clutch plate 23 and the driven side clutch plate 25 by the armature 26.
, A magnetic path forming hole 31 is drilled. The magnetic path forming hole 31 is closed by a sealing material 32 made of a non-magnetic material, thereby ensuring the tightness of the oil chamber 21. The clutch plates 23 and 25 are also provided with magnetic path forming holes 23a and 25a that match the positions of the magnetic path forming holes 31.

Accordingly, the wet clutch device having the above-described configuration uses oil by filling oil into the oil chamber 21, which is hermetically sealed by the oil seal 16 and the sealing material 32, and sealing the oil with the sealing plug 19. First, in a state where the coil 30 is not energized, when the pulley 15 is rotationally driven by the engine,
The cover 20 and the driving side clutch plate 23 rotate integrally therewith. Since the coil 30 is not energized, the amateur 26
Is not sucked, so that the driving side clutch plate 23 and the driven side clutch plate 25 slide, and the rotation is not transmitted to the hob 13 (the driven shaft 12).

On the other hand, when the coil 30 is energized, a magnetic flux shown by a schematic closed curve A in the drawing is generated in the pulley 15, the coil 30, the driving side clutch plate 23, the driven side clutch plate 25, and the armature 26, and the armature 26 It is sucked to the 15 side. With this suction force, the driving side clutch plate 23 and the driven side clutch plate 25
And the hob 13 and the driven shaft 12 rotate together with the driven clutch plate 25. Therefore, driven shaft 12
Is driven.

In the above drive, the cover 20 forming the oil chamber 21
The oil in the oil chamber 21 also rotates because the shaft rotates integrally with the pulley 15. Therefore, it can sufficiently enter between the driving side clutch plate 23 and the driven side clutch plate 25 to lubricate them. Further, since the cover 20 rotates, the heat radiation of the oil in the oil chamber 21 is high. In order to enhance the oil heat dissipation, heat dissipation fins can be provided on the outer surface of the cover 20.

Furthermore, since the coil 30 is exposed to the outside, heat dissipation is good. This is one of the advantages of the wet clutch device of the present invention as compared with the conventional wet clutch device in which all the coils are sealed in the oil chamber and heat radiation is difficult.

FIG. 2 and FIG. 3 show another embodiment of the present invention. This embodiment focuses on the point that the cover 20 is integrally fixed to the pulley 15, and provides support means for the driving side clutch plate 23 on the cover 20 side. A plurality of axial ridges 33 are formed on the inner peripheral surface of the cover 20, while a concave groove 34 is formed on the outer peripheral surface of the driving side clutch plate 23 to engage with the axial method ridge 33. ing. Due to this engagement relationship, the driving side clutch plate 23 can move in the axial direction of the pulley 15 and rotates integrally with the cover 20 (the pulley 15) in the rotation direction.

FIG. 4 shows another embodiment of the present invention in which the sealing positions are different. Generally, compressors for car coolers are
In many cases, a sealing means 35 is provided between the driven shaft 12 and the housing 11. Therefore, in this case, an oil seal 36 that seals between the pulley 15 and the hob 13 can be provided inside the bearing 14. In the first and second embodiments, the oil seal 16
Was provided outside the bearing 14. If the oil seal 36 is provided at this position, there is an advantage that the bearing 14 can be lubricated by the oil sealed in the oil chamber 21.

The above is an embodiment in which the present invention is applied to a wet clutch device of a compressor for a car cooler. FIG. 5 shows an embodiment of a wet clutch device of the present invention which can be used more generally. On the outer circumference of the driven shaft 12, a rotary tab
The rotatable bush 40 is fixed to the driven shaft 12 by a fixing plate 41 and a fixing bolt 42 so as not to move in the axial direction. On the outer periphery of the rotary bush 40, the cover 20 is rotatably supported via an oil seal 43, and the pulley 15 is rotatably supported via a bearing 14 'and an oil seal 44. And the hob 13 'is fixed to the outer periphery of the rotary bush 40 by key combination,
These pulley 15, cover 20 and hob 13 '(driven shaft 1
2) forms an oil chamber 21. This hob 1
The driving side clutch plate 23, the driven side clutch plate 25, and the armature 26 are supported by the 3 'and the pulley 15, as in the above embodiment. The coil 30 is supported via a bracket 29 on a coil detent lever (fixing member) 46 rotatably supported on a rotary bush 40 via a bearing 45.

The operation of the wet clutch device having the above configuration is not different from that of the first embodiment, and can be used more generally for connecting and disconnecting power between the pulley 15 and the driven shaft 12.

In the second to fourth embodiments, the same components as those in the first embodiment are denoted by the same reference numerals.

In the above embodiment, the pulley 15 is described as the driving side and the driven shaft 12 is described as the driven side, and in actuality, it is generally used.
The present invention can also be used when the driven shaft 12 is on the driving side and the pulley 15 is on the driven side. In the text and claims,
For the sake of clarity, the driving side and the driven side are distinguished for convenience, but this does not mean that the present invention does not include such a method of use.

[Effects of the Invention] As described above, the present invention utilizes a pulley and a cover fixed thereto as a part of an oil chamber housing of a wet clutch, and disposes a driving side and a driven side clutch plates therein. Therefore, it is possible to obtain a small wet clutch having a size similar to that of a dry clutch. Further, the oil chamber rotates together with the pulley, and the oil inside rotates accordingly, so that the heat radiation is excellent. Further, since the coil is disposed so as to be exposed to the outside, the heat radiation of the coil can be improved as compared with a conventional wet clutch in which the coil is sealed in the oil chamber.

[Brief description of the drawings]

1 is an upper half longitudinal sectional view showing an embodiment of a wet clutch device of the present invention, FIG. 2 is an upper half longitudinal sectional view showing another embodiment,
FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIGS. 4 and 5 are upper half longitudinal sectional views showing still another embodiment of the present invention. 11 ... housing, 12 ... driven shaft, 13 ... hob 13 '(driven shaft side member), 14, 14' ... bearing, 15 ... pulley, 16 ...
... oil seal, 18 ... fixing screw, 19 ... hermetic stopper, 20 ...
... cover, 21 ... oil chamber, 22, 24 ... ... axial groove, 23 ...
… Driving side clutch plate, 25 …… Driving side clutch plate, 26 ……
Amateur, 28 ... annular groove, 29 ... bracket, 30 ...
Coil, 31: magnetic path forming hole, 32: sealing material, 33: axial ridge, 34: concave groove, 36: oil seal, 40: rota bush (driven shaft side member), 43, 44 …… oil seal,
46 ... Coil detent lever.

Claims (1)

(57) [Claims] A pulley provided on an outer peripheral portion of the driven shaft so as to be rotatable relative to the driven shaft; a driven shaft side member integrated with the driven shaft; and a cover integrated with the pulley. An oil chamber is formed, and a driving clutch plate is positioned in the oil chamber and supported by a pulley or a cover so as to be movable in the axial direction. A driven clutch plate supported movably in the direction, and an armature movable in a direction in which the driven and driven clutch plates approach each other, wherein the pulley is provided with the driven and driven clutch plates and the armature. Corresponding to the position, an annular groove is formed in which the end on the non-rotating member side outside the pulley is open to the outside, which is directed toward the oil chamber without communicating with the oil chamber. Flax in oil chamber A wet-type clutch device, wherein a coil fixed to the non-rotating member is positioned for sucking a tua and bringing a driving side and a driven side clutch plate into close contact with each other.