JP2001140757A - Hybrid compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a driving part while rotation of a driving shaft by a motor is transmitted in a part as close as possible to a compression part. SOLUTION: A rotor composing a motor is formed on a second movable part fixed to a driving shaft to drive a compression mechanism by extending it to the axial block side of the driving part, and a stator composing the motor is provided on the inner part of the extended block part facing the rotor in the diameter direction. Therefore, the second movable part normally coupled to a first movable part through a means of coupling can be rotated in the same way by an engine for travelling or the motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid compressor used in a refrigeration cycle of a vehicle air conditioner mounted on a hybrid vehicle, an electric vehicle, an idle stop vehicle, or the like, and driven by at least two driving sources.

[0002]

2. Description of the Related Art In a hybrid compressor disclosed in Japanese Utility Model Laid-Open Publication No. 6-87678, a motor shaft of a motor unit is connected to a rotating shaft of a compression unit, and a pulley to which power of an engine is transmitted and the rotating shaft or the motor shaft. An electromagnetic clutch for selectively transmitting the rotation of the pulley to the rotation shaft is provided between the first and second motors. By turning on this electromagnetic clutch, the rotor of the motor unit is rotated by the power from the engine to drive the rotation shaft of the compression unit. At the same time, the rotating shaft of the compression unit is driven by the motor unit by charging and turning off the battery.

[0003]

However, in this conventional hybrid compressor, since the motor shaft of the motor is connected to the drive shaft for driving the compression unit, the compression unit is rotated via the drive shaft. When,
Since the distance from the drive unit that rotates the drive shaft increases, a problem occurs in which a large torsional moment is applied to the drive shaft. In addition, since the independent motor unit and the electromagnetic clutch unit are integrally formed, there is a problem that the driving part of the compressor becomes large.

Accordingly, an object of the present invention is to provide a hybrid compressor in which the rotation of a drive shaft by a motor is transmitted at a portion as close as possible to a compression section and the drive section is downsized.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a compression mechanism, a drive shaft for driving the compression mechanism, a pulley that rotates by transmitting a driving force of a traveling engine, the pulley and the drive shaft. Connecting means for connecting the ON and OFF so that
In a hybrid compressor including a motor that rotates the drive shaft by a battery, and a block that houses the compression mechanism and that rotatably holds the pulley and the drive shaft, the connecting unit is fixed to the pulley. A first movable portion that rotates with the pulley;
The motor includes a second movable portion fixed to the drive shaft, and a coupling mechanism for coupling the first movable portion and the second movable portion so as to be able to be turned on and off, and the motor includes the second movable portion. A rotor extending from the block to the axial block side of the drive shaft, an extending portion extending from the block to the inside of the rotor in the axial direction of the drive shaft, and being fixed to the extending portion and facing the rotor. And a stator arranged at the position.

Therefore, according to the present invention, the rotor constituting the motor is formed on the second movable portion fixed to the drive shaft for driving the compression mechanism so as to extend toward the axial block side of the drive portion. Since the stator constituting the motor is provided at the radially inner block extending portion facing the rotor, the second movable portion usually connected to the first movable portion via the connecting means is connected to the traveling engine or the motor. Thus, the above-described problem can be achieved.

Further, in the present invention, the connecting mechanism of the connecting means may be an electromagnetic clutch mechanism comprising an electromagnetic attraction part provided on the first movable part and an armature as the second movable part. good. With this, the rotor that extends from the armature to the axial block side of the drive shaft is formed in the armature of the second movable portion, so that the driving force of the traveling engine and the motor is increased by the second.
Thus, the above problem can be achieved.

Further, the connecting mechanism of the connecting means includes a claw provided on one of the first movable part and the second movable part, and the other of the first movable part and the second movable part. And a one-way mechanism including a meshing portion with which the claw meshes when the rotation of the first movable portion exceeds the rotation of the second movable portion. The connecting means may be any mechanism as long as the one-way clutch or the like can be connected only when one rotational speed exceeds the other rotational speed.

Accordingly, when the rotational force of the traveling engine exceeds the rotational force of the motor, the second movable portion is rotated by the one-way mechanism, and when the rotational force of the motor is greater, the second movable portion is rotated by the one-way mechanism. Since the second movable part idles with respect to the first movable part, the second movable part can be rotated by the motor when the first movable part stops or the rotation speed becomes low.

Further, in the hybrid compressor having the one-way mechanism, since the exciting coil by the electromagnetic clutch is unnecessary, the pulley fixing portion to which the pulley is fixed in the first movable portion is provided by the rotor. The diameter of the pulley fixing portion can be formed to be smaller than the diameter of the rotor portion, so that the pulley has a degree of freedom. It is possible to make it.

Further, it is preferable that the compression mechanism has a variable capacity mechanism. In particular, when a one-way mechanism or the like is employed, the compressor is constantly rotating when the traveling engine is rotating, so that the displacement amount of the compressor can be reduced to 0%. It is desirable.

[0012]

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

A hybrid compressor 1 shown in FIG. 1 is a rotary vane type compressor,
Compression chamber 5 between front block 2 and rear block 3
Is provided with the cylinder block 4 defined by the above. The cylinder block 4 includes a plurality of vanes 6.
The vane is rotated along the inner peripheral surface of the cylinder block 4 with the rotation of the rotor 7 to change the volume of the compression chamber 5. Things.

A drive shaft 8 for rotating the rotor 7 penetrates the front block 2, one end of which extends outside, and is disposed inside the front block 2 to close the front side of the cylinder block 4. A rear side block 1 disposed in a side block 9 and the rear block 3 to close a rear side of the cylinder block 4
0 is rotatably held via bearings 11 and 12.

The rear side block 10 has a suction port 13 of a compression chamber 5 formed in the cylinder block 4.
Variable mechanism 1 that varies the discharge volume by moving the position of
4 are provided. A suction space 15 is formed inside the rear block 3, and a discharge space 16 is formed inside the front block 2. In the figure, 1
Reference numeral 7 denotes a sealing mechanism for sealing between the discharge space 16 and the outside air around the drive shaft 8.

Thus, by the rotation of the drive shaft 8,
The rotor 7 rotates, and the refrigerant is sucked and compressed from the suction space 15 via the suction port 13 set by the variable capacity mechanism 14, discharged from the discharge port (not shown) to the discharge space 16, and sent to the next stroke. Things.

A driving unit 20 for rotating the driving shaft 8 includes:
As shown in FIGS. 1 and 2, a pulley 21 connected to a traveling engine (not shown) via a belt, a first movable portion 22 fixed to the pulley 21 and rotating together with the pulley 21, The second movable part 40 is fixed to the first movable part 22 and is connected to the first movable part 22 by connecting means.
And a motor unit 50 provided in the second movable unit 40.

The first rotating portion 22 is rotatably held by a first extending portion 23 extending in the axial direction of the front block 2 via a bearing 24. Further, the second movable portion 40 is fixed to the drive shaft 8 via a bolt 41 and the axial front block 2 of the drive shaft 8.
A rotor portion 42 extends to the side, and a plurality of permanent magnets 43 having different polarities are alternately arranged on the inner peripheral surface of the rotor portion 42. Also, a stator 45 fixed to the rotor portion 42 and a second extension portion 44 extending from the front block 2 to the inside of the rotor portion 42 in the axial direction of the drive shaft 8.
Thus, the motor 50 is configured. An exciting coil is wound around the stator 45, and the rotor section 4
2, a rotating magnetic field is generated.

As the connecting means, an electromagnetic clutch 30 is provided in the embodiment shown in FIGS. The electromagnetic clutch 30 is provided on the first movable portion 22 and has an electromagnetic attracting portion 32 provided with an exciting coil 31 for generating an electromagnetic force, and the electromagnetic clutch 30 is provided on the second movable portion 40. Armature 46 adsorbed on 32
And a connecting portion 46 connecting the armature 46 and the second movable portion 40.

With the above configuration, when the driving engine is used as the driving source, the first movable part 22 and the second movable part 40 are connected by turning on the electromagnetic clutch 30 and the pulley is turned on. The rotation of the drive shaft 21 is transmitted to the drive shaft 8 to rotate the drive shaft 8. When the traveling engine is stopped as necessary, such as a hybrid vehicle or an idle stop vehicle, the electromagnetic clutch 30 is turned off and the excitation coil 42 of the motor 50 is energized. Is rotated.

By controlling on / off of the electromagnetic clutch 30 and controlling energization of the exciting coil of the stator 45, the hybrid compressor 1 can be appropriately selected and driven by an appropriate drive source. Since the shaft 8 is always rotated by the second movable portion 40 fixed to one end of the drive shaft 8, the torsional moment applied to the drive shaft 8 can be reduced.

Hereinafter, other embodiments of the present invention will be described. The same portions or portions having the same effects are denoted by the same reference numerals, and description thereof will be omitted.

In the hybrid compressor 1A according to the second embodiment shown in FIG. 3, the first movable part 22 fixed to the pulley 21 and the second movable part 40 fixed to the drive shaft 8 have bearings. A one-way mechanism 30 </ b> A is arranged between the first movable part 22 and the second movable part 40 while being rotatably connected via 60. The one-way mechanism 30 </ b> A is provided on one of the first and second movable parts 22 and 40, and on the other of the first and second movable parts 22 and 40. When the rotation speed is higher than the rotation speed of the second movable portion 40, the locking portion engages with the claw portion.

Thus, when the driving engine is used as the driving source, the power supply to the exciting coil wound around the stator 45 is stopped so that the first movable portion 22 is turned off.
Since the rotation speed of the second movable portion 40 exceeds the rotation speed of the second movable portion 40, the one-way mechanism 30A meshes with the drive shaft 8, so that the drive shaft 8 connects the second movable portion 40, the first movable portion 22, and the pulley 21 to each other. Driven by the driving engine. When the running engine is stopped and the excitation coil is energized, the rotation speed of the second movable portion 40 exceeds the rotation speed of the first movable portion 22, so that the one-way mechanism 30A Since the drive shaft 8 is not engaged, the drive shaft 8 is driven by the rotor 42 of the motor 50 provided in the second movable portion 40, so that the same effects as those of the above-described embodiment can be obtained. The weight can be reduced.

The hybrid compressor 1B according to the third embodiment shown in FIG.
2, a large-diameter portion 22A connected to the second movable portion 40 via a bearing 60 and a one-way mechanism 30A;
And a small-diameter portion 22B to which the pulley 21 is fixed. Compared with the second embodiment described above,
There is an advantage that the diameter of the pulley 21 connected to the traveling engine can be freely designed.

Further, the hybrid compressor 1C according to the fourth embodiment shown in FIG.
A fixing portion 40A fixed to the drive shaft 8 having a small diameter;
The first movable portion 22 is formed so as to have the large-diameter rotor portion 42 and the outer periphery of the small-diameter fixing portion 40 </ b> A via a bearing 60.
The pulley 21 is fixed to the outer periphery of the pulley. This embodiment also has the same effects as the third embodiment described above.

In the above-described hybrid compressor, when a one-way mechanism, a one-way clutch or the like is used as the coupling mechanism, the rotating shaft 8 is always rotating when the traveling engine is operating. Therefore, it is necessary to use a variable capacity mechanism that can execute 0% capacity instead of stopping the operation of the compressor.

Further, when driven by the traveling engine, the rotor always rotates with respect to the stator, so that the electromotive force generated in the exciting coil of the stator may be stored in the battery.

[0029]

As described above, according to the present invention, when driven by the traveling engine, the second movable portion fixed to the drive shaft connects the first movable portion and the connecting means. When the traveling engine is stopped, the second movable portion formed integrally with the rotor of the motor rotates, so that the drive shaft can be rotated at the same location, The torsional moment applied to the drive shaft can be reduced.

Further, with the above-described configuration, the number of parts can be reduced, so that the size and weight of the portion for driving the compressor can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a hybrid compressor according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the hybrid compressor according to the first embodiment of the present invention.

FIG. 3 is a partially enlarged cross-sectional view of a hybrid compressor according to a second embodiment of the present invention.

FIG. 4 is a partially enlarged cross-sectional view of a hybrid compressor according to a third embodiment of the present invention.

FIG. 5 is a partially enlarged cross-sectional view of a hybrid compressor according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1, 1A, 1B, 1C Hybrid compressor 2 Front block 3 Rear block 4 Cylinder block 8 Drive shaft 20 Drive unit 21 Pulley 22 First movable unit 30 Electromagnetic clutch (connection mechanism) 30A One-way mechanism (connection mechanism) 40 Second Movable part 42 Rotor 43 Permanent magnet 45 Stator 50 Motor

Claims (5)

[Claims] 1. A compression mechanism, a drive shaft for driving the compression mechanism, a pulley to which driving force of a traveling engine is transmitted to rotate, and a connecting means for connecting the pulley and the drive shaft to be able to be turned on and off. A hybrid motor comprising: a motor configured to rotate the drive shaft by a battery; and a block accommodating the compression mechanism and rotatably holding the pulley and the drive shaft, wherein the connecting unit is fixed to the pulley. A first movable portion that rotates with the pulley, and a second movable portion that is fixed to the drive shaft.
And a connecting mechanism for connecting the first movable part and the second movable part so as to be able to be turned on and off, wherein the motor is arranged on the axial side of the drive shaft from the second movable part. A rotor extending from the block to the inside of the rotor in the axial direction of the drive shaft, and a stator fixed to the extension and disposed at a position facing the rotor. A hybrid compressor. 2. A coupling mechanism of the coupling means, wherein the coupling mechanism is an electromagnetic clutch mechanism including an electromagnetic attraction portion provided on the first movable portion and an armature as the second movable portion. Item 7. The hybrid compressor according to Item 1. 3. The connecting mechanism of the connecting means includes a claw provided on one of the first movable part and the second movable part, and the other of the first movable part and the second movable part. 2. The hybrid according to claim 1, wherein the one-way mechanism comprises a meshing portion that meshes with the claw portion when the rotation of the first movable portion exceeds the rotation of the second movable portion. compressor. 4. In the first movable portion, a pulley fixing portion to which the pulley is fixed is provided so as to extend axially outward of the drive shaft from a rotor portion provided with the rotor. The hybrid compressor according to claim 3, wherein a diameter of the fixed portion is smaller than a diameter of the rotor portion. 5. The hybrid compressor according to claim 1, wherein said compression mechanism includes a variable capacity mechanism.