JP2005256760A - Hybrid compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate abnormality (wear, seizure) of a bearing supporting a rotary shaft due to load generated at a time of rotation of a rotor of an electric motor which is attached to a rotary shaft of a compressor main body in a hybrid compressor. <P>SOLUTION: In the hybrid compressor capable of driving a compressor main body by a rotation force of an engine transmitted via a pulley and also by the electric motor, the pulley is attached on a cylindrical projection part of the compressor main body via the bearing. The rotor of the electric motor is attached to the cylindrical projection part of the compressor main body via the bearing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hybrid compressor that is used in a refrigeration cycle of a vehicle air conditioner mounted in a hybrid vehicle or an idle stop vehicle and is driven by at least two driving sources of a traveling engine and a motor.

    Conventionally, Patent Document 1 and Patent Document 2 can be cited as hybrid compressors. In Patent Document 1, a pulley 2 that receives a rotational force from a traveling engine is related to a driving force transmission device that rotationally drives a compressor, and a bearing 30 is provided on a cylindrical portion 27 of a rotation side member 26 such as a compressor. It is attached. The rotor 36 of the motor 33 is attached to the rotary shaft 1 of the fixed side member 26.

Further, in Patent Document 2, in Example 8, the pulley 19 that receives the rotational force from the traveling engine is attached to the housing 50 of the rotating electrical machine fixed to the housing 51 of the compressor 1 via a bearing. Yes. Further, the rotor 52 of the rotating electrical machine is attached to the rotating electric rotating shaft 11, that is, the driving shaft 2 of the compressor.
JP 2003-35757 A JP 2003-56461 A

  In the above-mentioned two patent documents, the rotor is attached to the rotary shaft of the compressor, so that the load of the rotor is received by a bearing inside the compressor via the rotary shaft. In this case, the load applied to the rotating shaft increases due to the unbalance of the rotor, and abnormalities (wear and seizure) occur in the compressor bearings that support the rotating shaft. In addition, when the rotor becomes larger and its weight increases, the natural value of vibration in the mode with the bearing of the compressor as a fulcrum decreases, resonating with vibration of the vehicle and the compression part, leading to abnormal noise and damage. .

  Therefore, an object of the present invention is to solve the problem of the compressor by the rotor of the electric motor.

  The hybrid compressor according to the present invention is provided for driving the compressor main body, the compressor main body, the pulley driven by the engine, and the compression when the driving force from the engine is not transmitted to the pulley. In the hybrid compressor including an electric motor for driving the machine main body, the pulley is attached to the compressor main body via a bearing, and the rotor of the electric motor is also attached to the compressor main body via a bearing. (Claim 1).

  For this reason, not only the pulley driven by the engine, but also the rotor of the electric motor is attached to the compressor body via a bearing, so that the load applied to the rotating shaft can be eliminated from the unbalance of the rotor of the electric motor. Prevents abnormal wear, breakage, and seizure at the machine bearing.

  Specifically, the pulley is provided between the inner peripheral surface of the pulley and the outer peripheral surface of the compressor body via a bearing (Claim 2), and the outer periphery of the compressor body that supports the pulley. The surface is a cylindrical projection (claim 3).

  In another example, the pulley may be attached via a bearing between its inner peripheral surface and an attachment member fixed to the outer peripheral surface of the compressor body (Claim 4), The rotor is attached via a bearing between the inner peripheral surface of the rotor and the outer peripheral surface of the compressor body. The outer peripheral surface of the compressor main body that supports the rotor is a cylindrical protrusion (Claim 6). That is, it is supported by the compressor body together with the pulley.

  As described above, according to the present invention, not only the pulley but also the rotor of the electric motor is attached to the compressor body via the bearing, so the load applied to the rotating shaft of the compressor is reduced, and the bearing portion of the compressor Prevents abnormal wear, breakage, and seizure. Since the rotor of the electric motor is supported by the compressor body, the allowable value of unbalance is increased, thereby improving productivity, avoiding resonance, preventing abnormal noise and damage, and increasing the size of the electric motor. Therefore, the adaptability to the vehicle and the freedom degree of the motor performance can be expanded.

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

  In FIG. 1, a hybrid compressor 1 is shown, which is roughly divided into a compressor main body 2 and a power transmission device 3. First, the structure of the compressor main body 2 will be described, and then the power transmission device 3 will be described.

  The compressor body 2 is a variable capacity compressor used as an example, and includes a cylinder block 11 and a rear head 13 assembled to the rear side (right side in the drawing) of the cylinder block 11 via a valve plate 12; The cylinder block 11 is assembled so as to cover it, and has a front head 15 that defines a crank chamber 14 on the front side (left side in the drawing) of the cylinder block. The front head 15, the valve plate 12, and the rear head 13 are fastened in the axial direction by fastening bolts 16 to constitute a compressor housing.

  A crank chamber 14 defined by the front head 15 and the cylinder block 11 accommodates a rotating shaft 17 having one end protruding from the front head 15. A hub 61 described below is fixed in the axial direction by a bolt 60 at a portion of the rotating shaft 17 protruding from the front head 15.

  Further, one end side of the rotary shaft 17 is hermetically sealed with the front head 15 via a seal member 21 provided between the rotary shaft 17 and is rotatably supported by a radial bearing 22. The other end of the rotary shaft 17 is rotatably supported by a radial bearing 24 housed in the support recess 23 of the cylinder block 11.

  The cylinder block 11 is formed with a support recess 23 in which the radial bearing 24 is accommodated, and a plurality of cylinder bores 26 arranged at equal intervals on a circumference centering on the support recess 23. A single-headed piston 27 is inserted into the cylinder bore 26 so as to freely reciprocate.

  A thrust flange 28 that rotates integrally with the rotary shaft 17 is fixed to the rotary shaft 17 in the crank chamber 14. The thrust flange 28 is rotatably supported via a thrust bearing 29 with respect to the inner wall surface of the front head 15 formed substantially perpendicular to the rotation shaft 17. A swash plate 31 is connected to the thrust flange 28 via a link member 30.

  The swash plate 31 is attached so as to be tiltable about a hinge ball 32 provided on the rotary shaft 17, and rotates integrally with the rotation of the thrust flange 28. And the swash plate 31 is moored by the engaging part 27b of the single-headed piston 27 via the pair of shoes 33 with which the peripheral part was provided forward and backward.

  Accordingly, when the rotary shaft 17 rotates, the swash plate 31 rotates along with this, and the rotational motion of the swash plate 31 is converted into a reciprocating linear motion of the one-headed piston 27 via the shoe 33, and the piston 27 in the cylinder bore 26. The volume of the compression chamber 34 defined by the valve plate 12 is changed.

  The rear head 13 includes a suction chamber 35 and a discharge chamber 36 continuously formed around the suction chamber 35. The valve plate 12 includes a suction valve (not shown) including a suction chamber 35 and a compression chamber 34. And a discharge hole 38 that connects the discharge chamber 36 and the compression chamber 34 via a discharge valve (not shown).

  Further, the rear head 13 is equipped with a pressure control valve 40 for controlling the pressure in the crank chamber, and the piston stroke, that is, the discharge capacity is adjusted by controlling the crank chamber pressure by the pressure control valve 40. Yes.

  Here, the piston stroke is the pressure applied to the front surface of the piston 27, that is, the pressure in the compression chamber (pressure in the cylinder bore), and the pressure applied to the back surface of the piston, that is, pressure in the crank chamber 14 (crank chamber pressure Pc). If the crank chamber pressure is increased, the differential pressure between the compression chamber and the crank chamber 14 is reduced. Therefore, the inclination angle (swing angle) of the swash plate 31 is reduced, and the piston stroke is Get smaller. On the contrary, if the crank chamber pressure is lowered, the differential pressure between the compression chamber 34 and the crank chamber 14 increases, so that the inclination angle (swing angle) of the swash plate 31 increases and the piston stroke increases.

  The power transmission device 3 includes a pulley 45 to which a rotational force from a traveling engine is transmitted. The pulley 45 includes an outer cylinder portion 45a and an inner cylinder portion 45b around which a belt is wound, and a side surface portion 45c that connects them. And has a space 46 surrounded by the outer cylinder portion 45a, the inner cylinder portion 45b, and the side surface portion 45c, and the inner peripheral surface of the inner cylinder portion 45b is a cylindrical shape that is the outer peripheral surface of the compressor body 2. The protrusion 47 is attached via a bearing 48.

  The outer peripheral surface side of the rotational force transmitting member 50 is fixed to the opposite side surface of the pulley 45. The inner peripheral side of the rotational force transmitting member 50 is attached to a base portion 55a of an electric motor rotor 55 described below via a one-way clutch unit 51. The one-way clutch unit 51 used here includes a one-way clutch 51a and a bearing 51b.

  The electric motor 54 includes a rotor 55 and a stator 56, and the rotor 55 has a permanent magnet 57, and an inner peripheral surface of a base portion 55 a is attached to the cylindrical protrusion 47 via a bearing 58. . The rotor 55 is coupled to the outer peripheral surface of the base portion 55a with the rotational force transmitting member 50 via the one-way clutch unit 51 described above, and the base portion 55a of the rotor 55 is bolted in the axial direction of the rotary shaft 17. 60 is connected to a fixed hub 61. Further, the stator 56 of the electric motor 54 is attached to the cylindrical projection 47 via a support 63 with a plurality of coils 62.

  In the above-described configuration, an operation example will be described in an example where the hybrid compressor 1 is used in an air conditioner for a vehicle. A rotational force is supplied from a traveling engine via a V belt (not shown). That is, the pulley 45 is rotated via the bearing 48, and the rotational force is transmitted from the rotational force transmitting member 50 to the rotor 55 via the one-way clutch unit 51. The rotor 55 is rotated via a bearing 58, and the rotational force is transmitted from the hub 61 to the rotating shaft 17 and rotated to become a driving source for the compression operation.

  When the traveling engine is stopped, the rotation of the pulley 45 is stopped, so that the electric motor 54 is energized and the rotor 55 is rotated. The rotational force is transmitted to the rotary shaft 17 via the hub 61 and becomes a driving source for the compression operation. That is, in the idle stop vehicle, even when the traveling engine is stopped, the rotational force is obtained by the electric motor 54 and the air conditioning is continued. At this time, the pulley 45 is not rotated by the one-way clutch unit 51.

  Since the pulley 45 and the rotor 55 of the electric motor 54 are supported by the cylindrical protrusion 47 on the outer peripheral surface of the compressor body 2 via bearings 48 and 58, the unbalance of the rotor 55 of the electric motor 54 is allowed. The value can be expanded, which makes it easier to improve productivity, avoid abnormal noise due to resonance, prevent damage and increase the size of the electric motor, and increase the adaptability to vehicles and the freedom of motor performance. be able to.

  In the figure, Embodiment 2 of the present invention is shown. The second embodiment is an example in which the positional relationship between the rotor 55 of the electric motor 54 and the stator 56 is different. In the second embodiment, the rotor 55 is provided on the inner side of the stator 56. Reduced. Other configurations are the same as those of the first embodiment described above, and the same parts are denoted by the same reference numerals and description thereof is omitted.

  FIG. 3 shows a third embodiment of the present invention. In the third embodiment, the pulley 45 has an inner peripheral surface attached to an attachment member 66 fixed to the compressor body 2 via a bearing 48, and a stator 56 of the electric motor 54 is attached to the attachment member 66. A rotor 55 of the motor 54 is attached to the cylindrical protrusion 47 via a bearing 58. Therefore, even in the third embodiment, the rotor 55 is supported by the cylindrical protrusion 47 of the compressor body 2 and does not adversely affect the rotating shaft 17. Other configurations are the same as those in the above-described embodiment, and the same portions are denoted by the same reference numerals and description thereof is omitted.

It is sectional drawing of Example 1 of this invention. It is sectional drawing of Example 2 of this invention. It is sectional drawing of this invention Example 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hybrid compressor 2 Compressor main body 3 Power transmission device 11 Cylinder block 12 Valve plate 17 Rotating shaft 22 Radial bearing 27 Single head piston 28 Thrust flange 29 Thrust bearing 31 Swash plate 35 Suction chamber 36 Discharge chamber 37 Suction hole 38 Discharge hole 40 Pressure Control valve 45 Pulley 45a Outer cylinder part 45b Inner cylinder part 47 Cylindrical protrusion 48 Bearing 50 Rotational force transmission member 51 One clutch unit 51a One clutch 51b Bearing 54 Electric motor 55 Rotor 55a Base 56 Stator 58 Bearing 61 Hub 62 Coil 63 Supporter 66 Mounting member

Claims (6)

The compressor body,
A pulley provided to drive the compressor body and driven by an engine;
In the hybrid compressor comprising an electric motor that drives the compressor body when the driving force from the engine is not transmitted to the pulley.
The hybrid compressor is characterized in that the pulley is attached to the compressor body through a bearing, and the rotor of the electric motor is also attached to the compressor body through a bearing.   The hybrid compressor according to claim 1, wherein the pulley is attached via a bearing between an inner peripheral surface of the pulley and an outer peripheral surface of the compressor body.   The hybrid compressor according to claim 2, wherein the outer peripheral surface of the compressor body is a cylindrical projection.   The hybrid compressor according to claim 1, wherein the pulley is attached via a bearing between an inner peripheral surface thereof and an attachment member fixed to the outer peripheral surface of the compressor body.   The hybrid compressor according to claim 1, wherein the rotor is attached via a bearing between an inner peripheral surface of the rotor and an outer peripheral surface of the compressor body.   The hybrid compressor according to claim 5, wherein the outer peripheral surface of the compressor body is a cylindrical protrusion.

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