JP3253341B2 - Mechanical supercharger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical supercharger.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional mechanical supercharger. This has a structure similar to that described in JP-A-3-500564. The supercharger 201 is rotationally driven by an engine via a belt-type continuously variable transmission 203. As is well known, the belt-type continuously variable transmission 201 includes a pair of speed change pulleys 207 and 209 connected by a belt 205.
1, 213 and fixed flanges 215, 217. The speed of the belt-type continuously variable transmission 203 is changed by the speed change pulley 20.
7,209, the change in the flange interval occurred on the belt 2
This is done by changing the other flange spacing via 05. These speed change pulleys 207 and 209 are individually attached to an engine bracket.

[0003]

The product test of the belt type continuously variable transmission 203 was carried out by using both pulleys 207 and 209.
Is mounted on a test mount, and the belt 20
In order to prevent the twisting of No. 5, the axial position adjustment (alignment adjustment) of the speed change pulleys 207 and 209 is performed. However, when assembling the engine, the speed change pulleys 207, 20
9 is separately attached to the bracket on the engine side as described above, so that the alignment adjustment must be performed a second time on the bracket, so that the adjustment cost is wasted and the alignment adjustment work on the engine is difficult. or,
In order to accurately perform the alignment adjustment, high machining accuracy and mounting accuracy are required for the bracket, resulting in high cost. On the other hand, if the alignment adjustment is not performed accurately, the belt 20
5 is twisted, and the movable flange 21 is caused by belt tension.
There is an error in the amount of movement of 1, 213 and the shift function is impaired,
The turbocharger cannot exhibit sufficient performance. Furthermore, when the speed change pulleys 207 and 209 are separately assembled, the distance between the shafts is likely to be long to avoid interference with other accessories and pulleys on the engine, so that the whole becomes large and the dead space inside the belt 205 is increased. However, the space becomes large and waste of space increases.

Accordingly, the present invention provides a mechanical supercharger driven by an engine via a belt-type continuously variable transmission,
By packaging the belt type continuously variable transmission,
Enables precise alignment adjustment and normal operation of the turbocharger, reduces the cost by eliminating the need for difficult alignment adjustment on the engine bracket and precise machining and mounting of the bracket, and reduces the overall size. The purpose of the present invention is to provide a mechanical supercharger capable of performing the following.

[0005]

SUMMARY OF THE INVENTION A mechanical supercharger according to the present invention includes a belt-type continuously variable transmission having a pair of speed-change pulleys connected by a belt and an engine via the belt-type continuously variable transmission. a supercharger that is driven to rotate, cable secured to the bracket of the engine as well as supporting the variable speed pulleys
And a sing .

[0006]

The transmission pulley to which the supercharger is connected and the transmission pulley 1 on the engine side are assembled and packaged in a common casing, and are assembled to the bracket of the engine via this casing . Therefore, since the alignment adjustment between the transmission pulleys can be accurately performed on the casing ,
This eliminates the need for difficult alignment adjustments associated with assembly to the engine, thereby eliminating the need for performing the alignment adjustment twice, and maintaining the functions of the belt-type continuously variable transmission and the supercharger normally. Further, it is not necessary to precisely machine and mount the bracket of the engine, and it is possible to reduce the size of the entire apparatus by packaging.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. FIG. 1 shows a mechanical supercharger 1 of this embodiment, and FIG. 3 shows an engine 3 to which the mechanical supercharger 1 is assembled. Hereinafter, the left and right directions are the left and right directions in FIG. 1, and members and the like without reference numerals are not shown.

As shown in FIG. 1, the mechanical supercharger 1 includes a belt type continuously variable transmission 5, a speed increasing section 6, and a centrifugal air compressor type supercharger 7.

The belt type continuously variable transmission 5 includes a drive pulley 9
, Driven pulley 11 and belt 1 connecting these
The drive pulley 9 is driven to rotate by the crankshaft of the engine 3 via a belt transmission mechanism.

The drive pulley 9 has a fixed flange 17 integral with the hollow shaft 15 and a movable flange 19 connected to the hollow shaft 15 so as to be movable in the axial direction. The hollow shaft 15 is supported on a support shaft 25 via bearings 21 and 23, and the support shaft 25 is
It is fixed to a fixing portion 31 a of the casing 31. A belt 13 is provided in a V groove 33 formed between the two flanges 17 and 19.
The movable flange 19 is connected to the disc spring 3 via a retaining ring 35 mounted on the hollow shaft 15 and a retainer 37.
9 presses the fixing flange 17 side to apply tension to the belt 13.

The driven pulley 11 drives the turbocharger 7 to rotate.
A hollow shaft 45 and a cam member 47 each of which is spline-engaged with a tip end of an input shaft 41 of the moving speed increasing portion 6 and is prevented from falling off by a nut 43; a fixed flange 49 integrated with the hollow shaft 45; And a movable flange 5 connected movably in the axial direction through a meshing portion provided between the movable flange 5 and the movable flange 5.
1 is provided. The right end of the hollow shaft 45 is a bearing 53
Is supported by the casing 31 through the input shaft 41 , and the input shaft 41 is hollow.
The shaft 45 extends in the axial direction of the hollow portion 45a and
Hollow portion 45a of hollow shaft 45 via rings 55 and 57
Supported by the extension 31b of the casing 31
ing. That is, the input shaft 41 has the casing 3
1 extending part 31b is provided so as to protrude from the opening end side.
This protruding part is connected to the driven pulley 11
As a result, the driven pulley 11 is supported by the extension portion 31b.
Have been. V-groove 5 formed between each flange 49, 51
A belt 13 is attached to 9, and the driven pulley 11 is connected to the drive pulley 9.

A cam surface 61 is formed on each of the cam member 47 and the movable flange 51, and a fly weight 63 is disposed between them. Driven pulley 11
When the rotor rotates, the centrifugal force of the flyweight 63 is changed to the cam surface 6.
The movable flange 51 is pressed toward the fixed flange 49 by the generated cam thrust force.

When the rotational speed of the driven pulley 11 increases with an increase in the engine rotational speed, the flange distance of the driven pulley 11 increases due to an increase in the cam thrust force, and the pulley pitch diameter R ₂ increases.
The spreads out the flange spacing of the drive pulley 9 smaller its Puripitchi diameter R ₁ Tension speed increasing ratio is reduced. Further, when the engine speed drops, the speed increasing ratio increases Puripitchi diameter R ₂ becomes large Puripitchi diameter R ₁ by the disc spring 39 of the drive pulley 19 thrust force is reduced is decreased. Thus, the fluctuation range of the rotation speed of the driven pulley 11 is suppressed to be smaller than the fluctuation range of the engine rotation speed, and the rotation speed of the driven pulley 11 is kept almost constant as the engine rotation speed increases.

The mating surface 67 of the casing 31 with which the flange 65 of the support shaft 25 of the drive pulley 9 comes into contact, and the cylindrical portions 69, 71, 73 on which the bearings 53, 55, 57 on the driven pulley 11 side are mounted are each of the pulleys. The machining is performed simultaneously so that the rotation axes 9 and 11 are parallel. Each pulley 9, 11 has a center line 75 of the respective V-groove 33, 59,
The alignment is adjusted so that 77 coincides. This alignment adjustment is performed, for example, by disposing a shim between the flange portion 65 of the support shaft 25 and the mating surface 67 of the casing and adjusting the thickness thereof.

Thus, the belt-type continuously variable transmission 5 is configured.

As described above, the drive pulley 9 and the driven pulley 11 are aligned and adjusted on the parallel axis.
The speed change function of the belt-type continuously variable transmission 5 is kept normal, and the durability of the belt 13 is not impaired, so that performance variations among the superchargers are reduced. Also, since the belt-type continuously variable transmission 5 is packaged by assembling the pulleys 9 and 11 on the casing 31, unlike a conventional example, the belt-type continuously variable transmission 5 is released from interference with peripheral devices, and unnecessary space is eliminated. Each pulley 9,
11 can be reduced to the utmost limit, and the entire apparatus has become extremely compact.

The speed increasing section 6 is a planetary gear type speed increasing mechanism. The internal gear 79 is integrally formed on the right end side of the input shaft 41, and the pinion gear 81 is a bearing 8
3, and is supported by a pinion shaft 85. The pinion shaft 85 is connected to the flange 87 of the casing 31.
And is provided with a falling-off prevention means 89 comprising a screw and a ball. Sun gear 91 is supercharger 7
Is formed on the left end side of the impeller shaft 93. The impeller shaft 93 is supported by a flange 87 via a unit bearing 95 and an oil film damper 97.

The driving force of the engine 3 input to the speed increasing section 6 via the belt type continuously variable transmission 5 is transmitted to the internal gear 79.
The rotation speed is increased through the pinion gear 81 and the sun gear 91 to rotate the impeller shaft 93.

Seals 99 and 101 for preventing oil leakage are disposed between the input shaft 41 and the casing 31 and between the unit bearing 95 and the impeller shaft 93, respectively. Oil is supplied to the oil film damper 97 from an oil plug 103 attached to an upper portion of the casing 31 and connected to an oil pump via a nozzle 105 and an oil passage 107. This oil lubricates the unit bearing 95, the speed increasing section 6, and the like, and is discharged outside through a discharge port 109 provided on the lower side of the casing 31 as shown in FIG.

The impeller 111 of the turbocharger 7 is press-fitted into the impeller shaft 93, and a falling-off prevention member 113 of the impeller 111 is swaged to the right end of the impeller shaft 93. The compressor housing 115 includes a connecting member 119 engaged with a circumferential groove 117 of the casing 31 and a bolt 121.
And is attached to the casing 31 via.

As shown in FIG. 2, the casing 31 is provided with two mounting holes 123, 123. As shown in FIG. 3, the casing 31 (the mechanical supercharger 1) has these mounting holes 123, 123. The bolts 125, 125 passing through 123 and nuts are attached to the bracket 127 of the engine 3, and the diffuser 129 of the compressor housing 115 is connected to the intake pipe 131 of the engine 3.

The supercharger 7 is rotated at a high speed by the driving force from the speed increasing unit 6, and pressurized intake air is supplied from the intake pipe 131 to the engine 3.
To supply.

Thus, the mechanical supercharger 1 is configured.

As described above, since the alignment adjustment of the belt-type continuously variable transmission 5 has already been accurately performed on the casing 31, the supercharger 7 operates normally and the engine is different from the conventional example. Therefore, there is no need to perform the second alignment adjustment. Therefore, the cost of alignment adjustment is reduced by half, and it is not necessary to perform the machining and assembly of the bracket with special precision, and the cost is reduced accordingly. The surroundings of the engine 3 are in a state in which various accessories and belt transmission mechanisms are densely arranged. Therefore, the compact size of the mechanical supercharger 1 is very advantageous in terms of effective use of the arrangement space. .

[0025]

According to the mechanical supercharger of the present invention, the belt-type continuously variable transmission is mounted and packaged on a casing common to both the transmission pulleys. Therefore, accurate alignment adjustment can be performed on the casing , and the engine bracket is provided. Eliminating the need for readjustment of the alignment above and precise machining and mounting of the brackets. Therefore, the speed change function and the performance of the supercharger are normally maintained, the cost is reduced, and the whole is downsized by packaging.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a front view of the engine assembled with the embodiment as viewed from the front of the vehicle.

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mechanical supercharger 3 Engine 5 Belt-type continuously variable transmission 7 Turbocharger 9 Drive pulley (speed-change pulley) 11 Driven pulley (speed-change pulley) 13 Belt 31 Casing (support member) 127 Placket

Claims (1)

(57) [Claims] 1. A pair of drive pulleys connected by a belt
A belt-type continuously variable transmission having a speed-change pulley composed of a shaft and a driven pulley, a supercharger rotationally driven by the engine via the belt-type continuously-variable transmission, The cable fixed to the bracket
And a single, the casing said driven pulley
Extending to the hollow part of this to support this driven pulley
Part and a support shaft for supporting the drive pulley are fixed.
An input shaft having a fixed portion and rotatably driving the supercharger is provided.
In this case, the distal end of the input shaft projects from the open end of the extension.
The input shaft is extended so as to protrude, and from the opening end side
A mechanical supercharger wherein a protruding portion is connected to the driven pulley .