JPH0612728U - Drive device for supercharger - Google Patents

Abstract

(57) [Summary] [Purpose] To enable endless cooling using compressed air from a supercharger. A drive device for a supercharger in which an endless belt is wound around a drive pulley driven by a crankshaft of an engine and a driven pulley connected to an input shaft of the supercharger. A cooling means for cooling the endless belt engagement portion of the pulley with compressed air of the supercharger is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive device of a supercharger for supplying air to an internal combustion engine.

[0002]

[Prior art]

 Conventionally, as a drive device of this type of supercharger, there is, for example, one described in Japanese Patent Publication No. 3-500564.

This has a continuously variable transmission driven by a crankshaft of an internal combustion engine, and a secondary pulley of this continuously variable transmission drives an input shaft of a planetary gear unit via an electromagnetic multi-plate clutch. A runner shaft with a runner is drivingly connected to the sun gear of this planetary gear unit.

The continuously variable transmission is composed of a belt type transmission, and has a V-belt connected to a primary side pulley connected to a crankshaft of an internal combustion engine and a secondary side pulley connected to an input shaft of a supercharger. It is constructed by winding a toe.

The secondary pulley is a fixed pulley piece rotatably supported by an input shaft via a bearing, and a movable pulley attached integrally to the fixed pulley piece so as to be rotatable and axially movable. And a V-belt groove is formed between the pulley pieces. Then, the width of the V-belt groove is increased or decreased to continuously change the speed.

[0006]

[Problems to be solved by the device]

 By the way, in the continuously variable transmission as described above, a large amount of heat is generated because the power transmission from the primary pulley to the secondary pulley is performed by friction transmission via the V-belt, and this heat causes the V-belt to move. There was a problem that the life was shortened.

On the other hand, it may be considered to provide a fin or the like on the pulley for cooling, but this is not possible in terms of space, and there is a problem that the fin has a low cooling effect and noise is generated.

Therefore, an object of the present invention is to provide a drive device for a supercharger that can efficiently cool compressed air of the supercharger.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is directed to a supercharger in which an endless belt is wound around a drive pulley driven by a crankshaft of an engine and a driven pulley connected to an input shaft of the supercharger. In the drive device, the cooling means is provided for cooling at least the endless belt engagement portion of the one pulley by the compressed air of the supercharger.

[0010]

[Action]

 According to this invention, the endless belt is cooled by the compressed air of the supercharger and heat generation is suppressed.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a driving device for a supercharger according to an embodiment of the present invention.

The supercharger 1 is driven by an internal combustion engine (not shown) via a continuously variable transmission 3 as a drive device.

The supercharger 1 has a runner 9 which is rotationally driven in a compressor housing 5 via a runner shaft 7. The runner shaft 7 is driven by the input shaft 11 through the sun gear 14 of the planetary gear unit 13 as a speed increasing gear device. The input shaft 11 is integrally connected to an internal gear 15 of a planetary gear device 13, and is rotatably supported in a boss 19 of a planetary gear device housing 17 via a pair of bearings 21. The above-mentioned runner shaft 9 is arranged coaxially with the input shaft 11, and is rotatable in the planetary gear device housing 17 via a unit bearing 29 provided between the planetary gear device 13 and the runner 9. It is supported.

The continuously variable transmission 3 is an endless belt including a driving pulley 31 driven by a crankshaft of an engine (not shown) and a driven pulley 33 connected to the input shaft 5 of the supercharger 1. It is configured by winding a V belt 35.

The drive pulley 31 is rotatably supported by a support shaft 39 fixed to a support frame 37 that is integral with the planetary gear device housing 17 of the supercharger 1. The drive side pulley 31 has a fixed pulley piece 41 and a movable pulley piece 43. The fixed pulley piece 41 has a cylindrical sleeve 45, which is rotatably supported by the support shaft 39 via a pair of bearings 47, and the movable pulley piece 43 has a cylindrical sleeve 49. The fixed pulley piece 41 is integrally attached to the sleeve 45 so as to be rotatable and axially movable, and is urged toward the fixed pulley piece 41 by a spring 50. Is formed.

The driven pulley 33 has a fixed pulley piece 53 and a movable pulley piece 55. The fixed pulley piece 53 has a cylindrical sleeve 57, and this sleeve 57 is loosely fitted on the boss portion 19 of the planetary gear device housing 17 with an appropriate gap and is fixed to the input shaft 11. The piece 55 is integrally rotatably attached to the sleeve 57 of the fixed pulley piece 53 so as to be movable in the axial direction, and a pulley groove 59 is formed between the pulley pieces 53 and 55.

An inclined cam surface 61 is formed on the back surface of the pulley groove 59 of the movable pulley piece 55, and a cylinder portion 63 is integrally formed on the outer edge of the inclined cam surface 61. On the other hand, a base portion of a guide cam plate 67 having an inclined cam surface 65 facing the inclined cam surface 61 is fixed to the input shaft 11. An outer edge portion of the guide cam plate 67 is in contact with an inner peripheral surface of the cylinder portion 63 via an O-ring 69 so as to be movable in the axial direction. A plurality of flyweights 71 equally arranged in the circumferential direction around the circumference of the input shaft 11 are arranged between the inclined cam surfaces 61 and 65. The flyweight 71 receives a centrifugal force generated by the rotation of the input shaft 11 and moves outward in the radial direction, and acts in cooperation with both inclined cam surfaces 61 and 65 to exert an axial pushing force on the movable pulley piece 55. To do.

Further, the support shaft 39 of the drive side pulley 31 is provided with a bottomed hole 73 in the axial direction and an open hole 75 in the radial direction communicating with the bottomed hole 73. Reeves 45 and the sleeve 49 of the movable pulley piece 43 are provided with open holes 77 and 79 which can communicate with each other and face the pulley groove 51. The other end of an air supply pipe 81, one end of which is connected to the compressor housing 5 of the supercharger 1, is connected to the opening of the bottomed hole 73.

The supercharger 1, the air supply pipe 81, the bottomed hole 73, and the open holes 75, 77, 79 blow the compressed air of the supercharger 1 onto the pulley groove 51 to cool the V-belt 35. Make up the steps.

Further, the nozzle groove 85 of the air supply pipe 83 whose one end is connected to the compressor housing 5 of the supercharger 1 faces the pulley groove 59 of the driven pulley 33. An external air guide cylinder 87 is attached to the nozzle portion 85, and has an ejector structure that takes in and blows the external air by the air having a high flow velocity discharged from the nozzle portion 85. The supercharger 1, the air supply pipe 83, the nozzle portion 85, and the outside air guide cylinder 87 constitute a cooling unit that blows the compressed air of the supercharger 1 and the outside air onto the pulley groove 59 to cool the V belt 35.

The blowing of the compressed air is not limited to the pulley grooves 51 and 59, but may be blowing to the V belt 35 between the pulleys 31 and 33.

Next, the operation of the above embodiment will be described.

The driving force of the internal combustion engine is transmitted from the crankshaft to the driving pulley 31, and is transmitted to the input shaft 11 via the V belt 35, the driven pulley 33. Then, the runner shaft 7 is driven by the input shaft 11 via the speed increasing gear device 13. Further, the runner 9 is driven at high speed through the runner shaft 7, and the compressed air in the compressor housing 5 is supplied to the internal combustion engine.

In this way, when the supercharger 1 is driven, the compressed air in the compressed air housing 5 passes through the air supply pipe 81, the bottomed hole 73, the open hole 75 and the open holes 77, 79, and the drive side. It is sprayed onto the pulley groove 51 of the pulley 31. The V-belt 35 is cooled by this compressed air blowing.

On the other hand, in the pulley groove 59 of the driven pulley 33, compressed air is blown from the nozzle portion 85 of the air supply pipe 83, and the outside air is taken in and blown from the outside air guide cylinder 87, so that the V-belt 35 is formed. To be cooled.

Therefore, heat generation of the V-belt 35 is prevented, and the life of the V-belt 35 can be improved.

[0028]

[Effect of device]

 As is clear from the above description, according to the configuration of the present invention, the endless belt of the continuously variable transmission can be cooled by using the compressed air of the supercharger and the heat generation is prevented. Life can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a drive device for a supercharger according to an embodiment.

[Explanation of symbols]

 1 Supercharger 3 Continuously Variable Transmission 7 Input Shaft 31 Drive Side Pulley 33 Driven Side Pulley 35 V Belt (Endless Band) 73 Bottomed Hole (Cooling Means) 75, 77, 79 Open Hole (Cooling Means) 81 Air Supply Pipe (Cooling means) 83 Air supply pipe (cooling means) 85 Nozzle part (cooling means) 87 Outside air guide tube (cooling means)

Claims (1)

[Scope of utility model registration request] 1. A drive device for a supercharger, comprising an endless belt wound around a drive pulley driven by a crankshaft of an engine and a driven pulley connected to an input shaft of the supercharger. A drive device for a supercharger, comprising: a cooling means for cooling an endless belt engagement portion of one pulley with compressed air of the supercharger.