JPH0913979A - Supercharger - Google Patents

Abstract

PURPOSE: To easily cope with a type having an electromagnetic clutch and a type having no electromagnetic clutch by inserting a connecting member into the gap between a boss member and an input shaft, spline-connecting the connecting member to the input shaft, and power-transmittably connecting the connecting member to a belt pulley. CONSTITUTION: A cylindrical boss member 150 is arranged concentrically with an input shaft 140 on the outer periphery side of the input shaft 140. A belt pulley 200 is rotatably coupled via a bearing 2 10 on the outer periphery of the boss member 150. A cylinder boss 254 serving as a connecting member is inserted into the gap 145 between the boss member 150 and the input shaft 140, and it is spline-connected to the input shaft 140. When no electromagnetic clutch 250 is provided, the cylinder boss 254 is integrated with the belt pulley 200 for power transmission. When the electromagnetic clutch 250 is provided, the cylinder boss 254 is integrated with a clutch plate 251. The structure to this side of the boss member 150, i.e., to the input shaft 140, can be used in common regardless of the presence or absence of the electromagnetic clutch 250.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanically driven supercharger which is mechanically actuated by receiving a driving force from an engine crankshaft.

[0002]

2. Description of the Related Art A supercharger is installed in the middle of an intake passage between a throttle valve and an intake port of an engine and directly mechanically operated by a belt drive utilizing rotation of a crankshaft of the engine. , Forcibly supercharges the cylinder of the engine.

The supercharger is classified into a type having an electromagnetic clutch for reducing drive loss of the engine and a type having no clutch.

FIG. 4 shows a conventional example of a supercharger with an electromagnetic clutch described in Japanese Patent Laid-Open No. 3-279689.

This supercharger 1 has a main body 2A.
Two rotors 3 and 4 for compressing air are provided inside the housing 2 including the cover 2B. The rotors 3 and 4 are coupled to rotor shafts 5 and 6, and the rotor shafts 5 and 6 are rotatably supported by the housing body 2A via bearings 7, 8, 9 and 10, respectively. Timing gears 11 and 12 that mesh with each other are provided at one ends of the rotor shafts 5 and 6, respectively, and one rotor shaft 5 is connected to an input shaft 15 via speed increasing gears 13 and 14.

The input shaft 15 is inserted into the boss portion 20 of the cover 2B, and the bearings 16 and 1 housed in the boss portion 20 are received.
7 so as to be rotatable. A gap is secured between the outer circumference of the tip end portion of the input shaft 15 and the inner circumference of the tip end portion of the boss portion 20, and the cylindrical boss 42 of the clutch plate 41 of the electromagnetic clutch 40 is inserted into the gap. It is connected to 15.

A belt pulley 30 is rotatably fitted to the outer periphery of the tip of the boss portion 20 of the cover 2B via a bearing 31. An electromagnet 43 of the electromagnetic clutch 40 is incorporated in the belt pulley 30, and the clutch plate 41 is controlled by controlling the magnetic force of the electromagnet 43.
By pressing or releasing the side wall of the belt pulley 30 from the belt pulley 30 and the input shaft 1.
Power transmission to and from the vehicle 5 is intermittently performed.

In the supercharger 1, when the clutch plate 41 is pressed against the belt pulley 30, the rotation of the belt pulley 30 by the engine is transmitted from the cylindrical boss 42 to the input shaft 15 via the clutch plate 41. When the input shaft 30 rotates, the rotor 3,
4 rotates and supercharges the engine.

FIG. 5 shows a conventional example of an electromagnetic clutchless type supercharger disclosed in Japanese Patent Laid-Open No. 3-290022.

This supercharger 51 has a main body 5
Inside the housing 52 consisting of 2A and the cover 52B,
It has two rotors 53, 54 for compressing the air. The rotors 53 and 54 are coupled to rotor shafts 55 and 56, and the rotor shafts 55 and 56 are rotatably supported by the housing body 52A via bearings 57, 58, 59 and 60, respectively. Timing gears 61 and 62 that mesh with each other are provided at one ends of the rotor shafts 55 and 56, and one rotor shaft 55 is provided at the other end side via the speed increasing gears 63 and 64.
5 is connected.

The input shaft 65 has a boss portion 70 of the cover 52B.
It is rotatably supported through a bearing 66 that is inserted into the boss portion 70 and is accommodated in the boss portion 70. A gap is secured between the outer circumference of the tip end portion of the input shaft 15 and the inner circumference of the tip end portion of the boss portion 20, and the cylindrical boss 81 of the belt pulley 80 is inserted into the gap and is coupled to the input shaft 65 by the key 82. . As a result, the belt pulley 80 is directly connected to the input shaft 65 and rotates integrally with the input shaft 65.

In this supercharger 51, the rotation of the belt pulley 30 by the engine is directly applied to the input shaft 1
5, the rotors 3 and 4 rotate to supercharge the engine.

[0013]

By the way, as in the above-mentioned conventional example, in the supercharger, the belt pulleys 30 and 80 have different attachment structures due to the presence or absence of the electromagnetic clutch. Etc. becomes troublesome. Therefore, there has been a demand for a common structure. In that case, since the bearing size may differ depending on whether or not the electromagnetic clutch is provided, it is required to easily handle such a case.

In this respect, in the case of the supercharger 1 with an electromagnetic clutch shown in FIG. 4, if the structure is changed to a structure without a clutch, the belt pulley 30 and the cylindrical boss 42 are integrated and the clutch plate 41 is formed. By omitting, there is a possibility that it can be easily realized. However, if the size of the bearing 31 of the belt pulley 30 changes due to the change, it cannot be easily dealt with. That is, in this conventional example, the boss portion 20 for mounting the belt pulley 30 is integrated with the housing 2. Since the bearings 16 and 17 for supporting the input shaft 15 are housed in the boss portion 20,
The entire cover 2B having the boss portion 20 must be changed or removed to be reprocessed, and the assembled state of the input shaft 15 must be once released. Therefore, there is room for improvement in terms of sharing the structure in advance.

Further, in the case of the supercharger 51 without the electromagnetic clutch shown in FIG. 5, since the belt pulley 80 is not supported via bearings in the first place, when changing to the one with the electromagnetic clutch, first, the belt pulley 8 is used.
It is necessary to fit 0 to the boss 70 via a bearing. On top of that, the shape of the conventional example shown in FIG. 4 must be changed. Therefore, there is a problem in that many design changes must be made to change to the type with an electromagnetic clutch.

In consideration of the above circumstances, the present invention can be easily adapted to a type with an electromagnetic clutch and a type without an electromagnetic clutch, by changing the bearing size for supporting the belt pulley, by making the structure as common as possible. The objective is to provide a supercharger that can easily respond to.

[0017]

According to a first aspect of the present invention, there is provided a housing having a rotor accommodated therein, and a first housing.
An input shaft that is rotatably supported via a bearing of the input shaft, is linked to the rotor so that power can be transmitted, and has one end protruding outside the housing, and an outer periphery of one end of the input shaft protruding outside the housing. A cylindrical boss member that is concentrically arranged with a gap in between, is manufactured separately from the housing, and is detachably fixed to the housing, and is rotatable around the outer periphery of the boss member through a second bearing. And a connecting member that is inserted into a gap between the boss member and the input shaft, is spline-coupled to the input shaft, and is connected to the belt pulley so that power can be transmitted. And

According to a second aspect of the present invention, in the supercharger according to the first aspect, the coupling member includes a clutch plate as a part of a clutch plate of an electromagnetic clutch that is pressed against the belt pulley by the magnetic force of an electromagnet. It is characterized by being configured integrally.

A third aspect of the invention is the supercharger according to the first aspect, wherein the connecting member is integrally formed with the belt pulley as a part of the belt pulley.

A fourth aspect of the present invention is the supercharger according to any one of the first to third aspects, in which the boss member has its flange portion fitted in a recess formed in the side wall of the housing. The first bearing is positionally fixed in that state.

[0021]

According to the invention of claim 1, when the belt pulley and the connecting member are connected to each other, when the belt pulley is rotated by the engine, the rotation is transmitted to the input shaft through the connecting member and the input shaft is rotated. The rotation causes the rotor to rotate, thereby performing a supercharging operation. In this case, the connecting member and the belt pulley can be connected via the electromagnetic clutch, or the connecting member and the belt pulley can be directly connected without using the electromagnetic clutch. When the size of the second bearing differs between the case where the electromagnetic clutch is provided and the case where the electromagnetic clutch is not provided, the outer diameter of the boss member is different. In that case,
If only the boss member manufactured separately from the housing is replaced and attached, it is possible to easily cope with it, and the structure up to the input shaft can be made common regardless of the presence or absence of the electromagnetic clutch.

According to the second aspect of the present invention, since the connecting member is formed as a part of the clutch plate of the electromagnetic clutch, when the clutch plate is pressed onto the belt pulley by the electromagnet, the belt pulley causes the input shaft to pass through the connecting member. The rotation of the belt pulley is transmitted to the input shaft. On the other hand, when the pressure on the clutch plate is released, the coupling member spline-coupled to the input shaft and the belt pulley are separated, and the power transmission is cut off.

According to the third aspect of the present invention, the belt pulley is directly connected to the input shaft because the connecting member is formed as a part of the belt pulley. Therefore, when the belt pulley rotates, the input shaft rotates integrally. Further, although the belt pulley is spline-coupled to the input shaft, it is supported by the boss member via the bearing, so that the belt pulley has high support strength.

In the invention of claim 4, since the bearing for supporting the input shaft is positionally fixed by the flange portion of the boss member, it is not necessary to provide a mechanism for pressing the bearing separately.

[0025]

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

FIG. 1 shows a supercharger 10 of the embodiment.
1 is a cross-sectional view showing a state before final assembly (state before assembling a belt pulley) of No. 1, showing a configuration of a common part before being assembled for each type.

This supercharger 101 has a housing 102 composed of a main body case 102A, a gear case 102B, and an end face cover 102C. Inside the main body case 102A, two rotors 103 and 104 for compressing the air taken in from the suction port 98 and discharging it from the discharge port 99 are housed. Each rotor 103, 1
04 is coupled to the rotor shafts 105, 106, and each rotor shaft 105, 106 has a bearing 10
Housing 10 via 7, 108, 109, 110
2 rotatably supported. Each rotor shaft 10
Timing gears 1 that mesh with each other
11, 112 are provided, and the rotor shaft 105 on one side is connected to the input shaft 14 via the speed increasing gears 113, 114.
Connected to 0. Here, the input shaft 140 and one speed increasing gear 114 are integrally formed.

The input shaft 140 is rotatably supported by a bearing (first bearing) 125 fitted and fixed in the bearing hole 122 of the end wall 121 of the gear case 102B, and the tip end of the housing 102 (the gear case 102).
It protrudes to the outside of B). One end of the bearing 125 has a positioning wall 12 provided at the inner end of the bearing hole 122.
The position is regulated by 3.

On the outer peripheral side of the input shaft 140, a cylindrical boss member 150 is arranged concentrically with the input shaft 140. A predetermined gap 145 is secured between the inner circumference of the boss member 150 and the outer circumference of the input shaft 140. The boss member 150 is manufactured separately from the gear case 102B forming the housing 102.
It is detachably fixed to the outer surface of the end wall 121 of 02B.

Here, the end wall 12 of the gear case 102B.
A circular recess 127 that is concentric with the bearing hole 122 is formed on the outer surface of No. 1, and the flange portion 151 of the boss member 150 is fitted into the recess 127. The boss member 150 is properly centered by the sliding contact fitting of the inner circumference 128 of the recess 127 and the outer circumference 154 of the flange portion 151, and the flange portion 151 is stopped by the screw 162 in this state, thereby 150 is fixed to the gear case 102B. Therefore, the boss member 150 can be easily removed and replaced.

Further, with the boss member 150 fixed in this manner, the groove 1 formed between the flange portion 151 of the boss member 150 and the end wall 121 of the gear case 102B.
A retaining ring 160 is sandwiched between 58. The stop ring 160 regulates the position of the outer end (left end in FIG. 1) of the bearing 125 that supports the input shaft 140.

Further, the bearing 12 is fitted inside the boss member 150 by being press-fitted onto the outer periphery of the input shaft 140.
A sleeve 164 for fixing the position of the inner ring of No. 5 and an oil seal 166 for sealing a gap between the sleeve 164 and the boss member 150 by slidingly contacting the outer circumference of the sleeve 164 are provided.

A spline 143 is formed on the outer periphery of the tip of the input shaft 140, and a screw hole 142 is formed on the end face of the tip.
Are formed. These are for connecting a belt pulley and a clutch plate described later. Further, at the center of the input shaft 140, from the screw hole 142, the speed increasing gear 1
A center hole 147 reaching the side surface of 14 is formed therethrough.

Further, on the outer periphery of the tip portion of the boss member 150,
A bearing fitting portion 152 that supports the belt pulley is secured. The bearing fitting portion 152 is a portion that is cut as necessary, and a bearing positioning step portion 153 is provided adjacent to the bearing fitting portion 152.

The structure of the common part is as described above. On the other hand, in the case of the type with an electromagnetic clutch, the supercharger is completed by assembling the electromagnetic clutch and the belt pulley, and in the case of the type without an electromagnetic clutch, another Complete the supercharger by assembling the belt pulley.

Next, a supercharger that has been subjected to final assembly for each type will be described.

FIG. 2 is a sectional view of an essential part of a supercharger assembled into a type with an electromagnetic clutch, and FIG. 3 is a sectional view of an essential part of a supercharger assembled into a type without an electromagnetic clutch.

First, a supercharger with an electromagnetic clutch will be described with reference to FIG.

In this supercharger with an electromagnetic clutch, the bearing fitting portion 152 of the boss member 150 is
The inner ring of the bearing (second bearing) 210 is fitted and fixed, and the belt pulley 2 is attached to the outer ring of the bearing 210.
00 is fitted. Diameter r of bearing fitting part 152
1 is set so as to match the inner diameter of the bearing 210 selected here. The bearing 210 is positioned by a step portion 153 formed on the outer periphery of the boss member 150 and a retaining ring 211 attached to the bearing fitting portion 152.

The belt pulley 200 has an outer peripheral belt winding portion 202, an inner peripheral cylindrical boss portion 203, an annular concave portion 204 formed therebetween, and a side wall 205 corresponding to a bottom wall of the annular concave portion 204. And is fitted and fixed to the outer ring of the bearing 210 by the boss portion 203.

The supercharger also has an electromagnetic clutch 250 for connecting and disconnecting the belt pulley 200 and the input shaft 140.

The electromagnetic clutch 250 comprises a clutch plate 251 fixed to the tip of the input shaft 140, and an electromagnet 260 for pressing the pressure plate 252 of the clutch plate 251 to the side wall 205 of the belt pulley 200 by magnetic force.

The electromagnet 260 is accommodated in the annular recess 204 of the belt pulley 200 in a non-contact manner, and is fixed to the flange portion 251 of the boss member 150 with a screw 262 via a bracket 261.

The clutch plate 251 is a leaf spring 253.
The pressure-bonding plate 252 is held by means of a cylindrical boss (coupling member) 254 integrally formed on the inner peripheral portion. The cylindrical boss 254 has a clearance 1 between the input shaft 140 and the boss member 150.
45 and inserts its own spline 255 into the input shaft 14
No. 0 spline 143 and fixing bolt 256
Is fastened to the screw hole 142 on the end surface of the input shaft 140 via the washer 257, so that it is integrally rotated with the input shaft 140. In this state, the cylindrical boss 254
The tip end 254a of the abuts against the sleeve 164.

In the supercharger thus constructed, when the crimping plate 252 of the clutch plate 251 is crimped to the side wall 205 of the belt pulley 200 by the electromagnet 260, the belt pulley 200 is attached to the input shaft 140 via the clutch plate 251. The rotation of the belt pulley 200 by the engine is transmitted to the input shaft 140, and the rotation of the input shaft 140 causes the rotors 103, 10 to rotate.
4 is rotated to supercharge the engine.

On the contrary, when the pressure contact of the clutch plate 251 is released, the input shaft 140 and the belt pulley 200 are separated, and the power transmission is cut off.

This supercharger has an electromagnet 26.
0 and the clutch plate 250 can be completed by assembling them together with the belt pulley 200. At this time, the size of the bearing 210 that supports the belt pulley 200 may differ depending on the capacity of the electromagnetic clutch 250. In such a case, the boss member 150 manufactured separately from the housing 102 may be used. By exchanging or once removing the boss member 150 and performing outer peripheral processing, it is possible to easily cope with the situation.

Next, a supercharger of a type without an electromagnetic clutch will be described with reference to FIG.

In this clutchless type supercharger, the bearing fitting portion 152 of the boss member 150 is used.
The inner ring of the bearing (second bearing) 310 is fitted and fixed to the outer ring of the bearing 310, and the belt pulley 300 is fitted to the outer ring of the bearing 310. The diameter r2 of the bearing fitting portion 152 is set to match the inner diameter of the bearing 310 selected here.

The belt pulley 300 has a belt winding portion 302 on the outer periphery, a cylindrical boss (connecting member) 303 on the inner periphery, an annular recess 306 formed between them, and an annular recess 30.
6 has a side wall 307 corresponding to the bottom wall of the boss member 6 and is coupled to the input shaft 140 by a cylindrical boss 303. By fitting the inner circumference of the belt winding portion 302 to the outer ring of the bearing 310, the boss member 150 is formed. It is rotatably supported by.
In this case, the tip of the boss member 150 and the bearing 310 are housed in the annular recess 306.

The cylindrical boss 303 is inserted into the gap 145 between the input shaft 140 and the boss member 150, the spline 305 of the cylindrical boss 303 is fitted to the spline 143 of the input shaft 140, and the fixing bolt 256 is inserted through the washer 257. By being fastened to the screw hole 142 on the end surface of the input shaft 140, the input shaft 140 is coupled to rotate integrally.
In this state, the tip end 303a of the cylindrical boss 303 is in contact with the sleeve 164.

In the supercharger constructed as above, the belt pulley 300 is directly connected to the input shaft 140. Therefore, when the belt pulley 300 is rotated by the engine, the input shaft 140 rotates and the rotors 103, 10 rotate.
4 rotates to supercharge the engine. In this case, since the belt pulley 300 is supported by the boss member 150 via the bearing 310 rather than being supported by the input shaft 140, the supporting strength against bending moment is high.

As described above, by assembling the electromagnetic clutch 250 and the belt pulley 200 into the structure of the common portion shown in FIG. 1, the supercharger shown in FIG. 2 can be constructed, and another belt pulley 300 can be constructed. Once assembled,
The supercharger shown in FIG. 3 can be constructed. At this time, even if the sizes of the bearings 210 and 310 supporting the belt pulleys 200 and 300 are different, it is possible to easily deal with them.

That is, the boss member 150 that supports the belt pulleys 200 and 300 is manufactured separately from the housing 102, and the bearing 125 that supports the input shaft 140 is completely housed on the housing 102 side. Therefore, the structure of the boss member 150 is extremely simple, and replacement and design change are easy. Therefore, even if the size of the bearings 210 and 310 for supporting the belt pulley is changed, it is possible to deal with it by replacing and attaching only the boss member 150 having the simple structure. Therefore, the structure up to the front side of the boss member 150, that is, the structure up to the input shaft can be made common regardless of whether or not the electromagnetic clutch is provided, and without a large design change, without the electromagnetic clutch. Can respond.

Further, in the above supercharger, since the position of the input shaft supporting bearing 125 is regulated by the flange portion 151 of the boss member 150, it is not necessary to provide a mechanism for pressing the bearing, and the structure is simplified. It is possible to shorten the dimension in the axial direction.

[0056]

As described above, according to the invention of claim 1, the boss member for supporting the belt pulley is manufactured separately from the housing, and the input shaft is completely supported on the housing side. The structure of the boss member can be a simple structure that only supports the belt pulley. Therefore, if the size of the part to which the belt pulley is attached changes, it can be dealt with by replacing and attaching only the boss member of that simple structure. The structure can be made common with or without the electromagnetic clutch. As a result, it is possible to easily cope with the existence of the electromagnetic clutch without making a large design change, and the cost does not increase.

According to the second aspect of the present invention, a supercharger with an electromagnetic clutch can be completed by assembling the electromagnet and the clutch plate with the connecting member integrated together with the belt pulley. At this time, the size of the bearing that supports the belt pulley may differ depending on the capacity of the electromagnetic clutch.In such a case, replace the boss member manufactured separately from the housing, or By once removing the member and subjecting it to outer periphery processing, it is possible to easily cope with it.

According to the third aspect of the present invention, a supercharger without an electromagnetic clutch can be completed by assembling the belt pulley with the boss member and simultaneously spline-connecting the connecting member to the input shaft. At this time, the size of the bearing that supports the belt pulley may be different,
In such a case, the boss member manufactured separately from the housing can be replaced, or the boss member can be detached once and subjected to outer peripheral processing to easily cope with it.

According to the fourth aspect of the invention, since the bearing for supporting the input shaft is pressed by the flange portion of the boss member, the structure of the bearing fixing portion can be simplified and the axial dimension can be shortened.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of the present invention before final assembly.

FIG. 2 is a cross-sectional view of essential parts of a supercharger with an electromagnetic clutch according to an embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a supercharger without an electromagnetic clutch according to an embodiment of the present invention.

FIG. 4 is a sectional view showing a conventional example of a supercharger with an electromagnetic clutch.

FIG. 5 is a cross-sectional view showing a conventional example of a supercharger without an electromagnetic clutch.

[Explanation of symbols]

 101 supercharger 102 housing 103, 104 rotor 125 bearing (first bearing) 127 recess 140 input shaft 143, 255, 305 spline 150 boss member 151 flange part 200, 300 belt pulley 210, 310 bearing (second bearing) 250 Electromagnetic clutch 251 Clutch plate 254, 303 Cylindrical boss (connecting member) 260 Electromagnet

Claims (4)

[Claims] 1. A housing having a rotor housed therein, a rotor rotatably supported by the housing via a first bearing, linked in a power-transmittable manner with the rotor, and having one end outside the housing. A cylindrical input shaft that is projected, and is concentrically arranged with a gap around the outer periphery of one end of the input shaft that projects to the outside of the housing, is manufactured separately from the housing, and is detachably fixed to the housing. A boss member, a belt pulley rotatably fitted to the outer periphery of the boss member via a second bearing, and a belt pulley inserted into a gap between the boss member and the input shaft and spline-coupled to the input shaft, and A supercharger comprising a belt pulley and a connecting member that is connected so as to be able to transmit power. 2. The supercharger according to claim 1, wherein the connecting member is formed integrally with the clutch plate as a part of a clutch plate of an electromagnetic clutch that is pressed against the belt pulley by the magnetic force of an electromagnet. A supercharger characterized by being present. 3. The supercharger according to claim 1, wherein the connecting member is integrally formed with a belt pulley as a part of the belt pulley. 4. The supercharger according to claim 1, wherein the boss member is screwed in a state in which a flange portion of the boss member is fitted in a recess formed in a side wall of the housing. Is
A supercharger characterized in that the first bearing is positionally fixed in that state.