WO2002020989A1 - Hybrid compressor - Google Patents

Abstract

A hybrid compressor, wherein a one-way clutch (23) is disposed between the output shaft (20) and the rotor (21) of a motor (5) when the motor is of a brushless outer rotor type so that, when the motor (5) is used as a drive source, the rotating for ce of the rotor (21) is transmitted from the output shaft (20) to a rotating shaft (3) and, when an engine is used as the drive source, through the rotating force is transmitted from the rotating shaft (3) to the output shaft (20), the output shaft (20) is idled and the rotating force is not transmitted to the rotor (21), whereby the provision of a regenerative circuit for temporarily storing the electricity generated by the generating action of the motor into a battery and, as required, returning the electricity to the motor and a relay preventing a motor drive circuit from being unnecessarily energized can be eliminated and an impact force can be avoided from being produced by the rotating inertia of the motor rotor when the clutch is engaged.

Description

 Description Noiprip Compressor Technical Field

 The present invention relates to a structure of a hybrid compressor that rotates a rotation shaft by being selectively connected to two driving means. Background art

 A hybrid compressor having two types of driving means, such as an engine and a motor, and having a mechanism in which a rotating shaft is rotated by being selectively connected to the two driving means, is disclosed in As disclosed in Japanese Patent Application Laid-Open No. 2000-54049, a structure in which an engine drive clutch, a compression section, and a motor are integrally structured has already been disclosed.

 However, in such a structure of the hybrid compressor, the rotor of the motor is also rotated when the compression unit is driven by the driving force of the engine. Therefore, when a permanent magnet is used for the rotor, the motor is used as a generator. As a result, the electric power generated by the motor was energized and the motor drive circuit was damaged.

As a means for solving this problem, a regenerative circuit for temporarily storing electricity generated by the power generation action of the motor in a battery and returning it to the motor when necessary is provided as in a hybrid compressor disclosed in the above-mentioned patent application. It is conceivable to provide a relay so that the motor drive circuit is not unnecessarily supplied with electricity. However, this will complicate the structure of the hybrid compressor and increase its size. The disadvantage is that the cost is high. Also, when the clutch is switched from a mode using a motor as a drive source to a mode using an engine as a drive source, an impulse is generated due to the rotational inertia of the motor rotor, and a heavy load is applied to the hybrid compressor itself and the engine. And driving operability ■ There was also a problem that driver perception, such as rideability, deteriorated.

 Therefore, an object of the present invention is to provide a hybrid compressor in which the rotor of a motor is prevented from rotating when the engine is used as a drive source. Disclosure of the invention

 In order to achieve the above object, a hybrid compressor according to the present invention includes: a rotating shaft; a compression unit driven by rotation of the rotation shaft; and a compressor mounted on one side of the rotation shaft with respect to the compression unit. An electromagnetic clutch for transmitting the rotation of the engine to the rotary shaft by selectively connecting the pulley and the rotary shaft to the bury to which the rotation of the engine is transmitted, and an output shaft, a stator and a rotor, In a hybrid compressor comprising at least a motor for driving a section, an automatic clutch for transmitting only one rotational force to the other is arranged between the output shaft and the rotor. ing.

 As the hybrid compressor, one in which the output shaft and the rotating shaft are coaxially connected is considered. It is also conceivable that the output shaft and the rotation shaft are arranged on different shafts and a rotation transmission mechanism is provided between the output shaft and the rotation shaft.

According to such a configuration, when the motor is used as the drive source, the rotational force of the rotor is transmitted to the output shaft and the rotary shaft to drive the compression unit, while when the engine is used as the drive source, the rotary unit is rotated. Shaft Is not transmitted to the motor rotor by the one-way clutch. Therefore, since the rotor does not rotate, the motor does not work as a generator, and there is no adverse effect due to the inertia of the rotation of the motor rotor even when the clutch is engaged. Can be planned.

 Further, as another configuration, a rotating shaft, a compression portion driven by the rotation of the rotating shaft, a pulley mounted on one side of the compression portion of the rotating shaft and transmitting the rotation of the engine, and An electromagnetic clutch that transmits the rotation of the engine to the rotary shaft by selectively connecting the pulley and the rotary shaft, and a motor that is configured by an output shaft, a stator, and a rotor and drives the compression unit are at least formed. In the hybrid compressor, the compressor body including the electromagnetic clutch and the compression section and the motor are separately arranged, a pulley is provided on an output shaft of the motor, and the compressor body is different from a bulge of the electromagnetic clutch. 2 pulleys, and the pulley of the motor and the second pulley of the compressor body are connected by connecting means. While binding, between the boot Li and the output shaft of the motor, there is one one-way clutch for transmitting only one of the rotational force to the other was arranged.

According to such a configuration, when the motor is used as the drive source, the rotational force of the rotor is transmitted from the output shaft to the rotary shaft via the pulley of the motor and the second burry of the compression section, while the engine is driven. When a driving source is used, torque is transmitted from the rotating shaft to the motor pulley via the second pulley, but torque is not transmitted from the motor pulley to the motor output shaft. Therefore, since the rotor does not rotate, the motor does not work as a generator, and there is no adverse effect due to the inertia of the rotation of the motor rotor even when the clutch is engaged, so that the drivability is improved. It is possible You. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic explanatory view showing a configuration of a hybrid compressor according to the present invention, in which a rotating shaft and an output shaft are located on a coaxial line. FIG. 2 is a cross-sectional view showing an example of a one-way clutch disposed between an output shaft and a rotor of the hybrid compressor. Figure 3 is a hybrid compressor according to the present invention, _c FIG. 4 is a schematic diagram illustrating the structure of what the rotating shaft and the output shaft are located on different axes, hybridization according to the present invention FIG. 3 is a schematic explanatory view showing a configuration of a compressor which is a compressor in which a motor serving as a driving source is separate from a compressor unit. BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

 The hybrid compressor 1 shown in Fig. 1 is used for refrigeration of an air conditioner mounted on a hybrid vehicle that has two driving sources: an engine such as a gasoline engine or a diesel engine and a driving motor driven by a battery. A compression part 2, a rotating shaft 3 for transmitting a driving force to the compression part 2, and an electromagnetic clutch provided at a portion of the rotation shaft 3 protruding from the front side of the compression part 2. 4 and a motor 5 arranged on the rear side of the compression section 2.

The compression section 2 is a vane type in this embodiment, and has a cylinder block 6 having a substantially elliptical inner peripheral surface, and a front block fixed to one end of the cylinder block 6. De block 7 and this flow A front side head 9 which forms a discharge chamber 8 between the front side block 6 and the front side block 6 is pressed against the cylinder block 6 side, and the suction side is fixed to the other end of the cylinder 6. And a rearside block 11 forming 10. The front side head 9 has a discharge port (not shown) for the refrigerant, and the rear side block 11 has a suction port (not shown) formed therein. The suction port communicates with the suction chamber 10.

 A rotor 12 is disposed in the cylinder block 6, and the rotor 12 is supported by the front side block 7 and the rear side block 11 via a bearing (not shown). In addition to being mounted on the above-mentioned rotating shaft 3, two spaces (not shown) are defined at symmetrical positions in the cylindrical hook 6. Although not shown, a plurality of vane grooves are formed in the rotor 12 substantially in the radial direction, and the vanes 13 are slidably inserted into the vane grooves, respectively. The first 13 is urged outward by the high pressure (discharge pressure) supplied to the vane groove.

 Further, on the cylinder 2 side of the rear side block 11, there is provided a variable capacity mechanism 14 composed of a rotating plate and a drive mechanism thereof, and the operation of the variable capacity mechanism 14 causes the suction chamber to operate. The refrigerant in 10 is drawn into the compression chamber in cylinder 2 via a predetermined path.

Accordingly, the tip of the vane 13 moves with the rotation of the rotor 12 while abutting on the inner peripheral surface of the cylinder block 6, and the space of the cylinder block 6, the rotor 12, The compression chamber defined by the side blocks 7, 11 and the adjacent vanes 13 changes its capacity while moving with the rotation of the rotor 12, so that suction and compression are performed. And pressure The compressed fluid reaches the discharge chamber 8 via a discharge valve or the like (not shown).

 On the other hand, the electromagnetic clutch 4 includes a bully 16 rotatably mounted on a hub formed on the front side head 9 via a bearing 15, an electromagnet 17 for magnetizing the pulley 16, The armature 18 is fixed to the shaft 3 and magnetized by the pulley 16. The armature 18 is attracted to the pulley 16. The torque of the engine transmitted to the pulley 16 via a belt (not shown) is The current applied to the electromagnet 17 is 〇N / 〇FF so that transmission to the compression unit 2 is appropriately controlled. In this embodiment, the motor 5 is an outer rotor type brushless motor, and has a stator 19 fixed to a rear side block 7 of the compression unit 2 and an output extending coaxially with the rotation shaft 3. A shaft 20 and a rotor 21 fixed to the output shaft 20 are provided. A coil for generating a rotating magnetic field is wound around the stator 19 and the rotor 2 1 has a permanent magnet 22 provided at a portion facing the stator 19.

 The rotor 21 has a cylindrical hub 21 a formed so as to cover the outer periphery of the output shaft 20, and a gap between the inner periphery of the hub 21 a and the outer periphery of the output shaft 20. Is provided with a one-way clutch 23.

An example of the one-way clutch 23 will be described with reference to FIG. 2. An annular clutch outer 24 arranged on the inner periphery of the hub 21 a and rotating integrally with the rotor 21, A roller 26 arranged between the concave portion 25 formed inside and the outer peripheral surface of the output shaft 20, and one end is connected to the clutch outer 24 and the other end An elastic mechanism 27 (for example, an elastic body such as a spring ゃ rubber) that presses in a counterclockwise direction. Inclined wedge to increase the width of the space for storing 6 It has a shape. Note that the output shaft 20 functions as a clutch inner.

 By using the one-way clutch 23 having such a configuration, when the motor 5 is used as the driving source, the torque from the rotor 21 is transmitted, and the clutch counter 24 is rotated clockwise with respect to the output shaft 20. When rotated, the spring 26 of the elastic mechanism 27 moves the roller 26 to a position where the space of the recess 27 of the clutch counter 24 is narrow (the position shown in FIG. 2). Therefore, the output shaft 20 is rotated by the wedge action of the inner peripheral surface of the concave portion 27 of the clutch outer 24 and the output shaft 20, and thus the rotating shaft 3 is rotated.

 On the other hand, when the engine is used as the drive source, the rotor 21 is stopped while the rotational force is transmitted from the rotating shaft 3 to the output shaft 20.- The output shaft 20 rotates clockwise. When rotated, the roller 26 is pulled by the rotation of its output shaft 20, the space of the concave portion 27 of the clutch outer 24 is moved away from the narrow position (the position shown in FIG. 2), and the output shaft 20 is The wheel spins, and its rotating force is not transmitted to the clutch outer 24 and, consequently, the rotor 21, and the rotor 21 stops.

 For this reason, when the engine is used as the driving source, the motor 21 having the permanent magnet 22 does not rotate, so that no power is generated, and the generated power is temporarily stored in the battery and the motor is driven. The regenerative circuit for supplying the motor 5 and the relay for preventing unnecessary excessive electricity from being supplied to the drive circuit of the motor 5 are not required.

However, the hybrid compressor 1 capable of using the present invention has a rotating shaft 3 for transmitting a driving force to the compression unit 2 and an output shaft 20 of the motor 5 coaxially as shown in FIG. The rotating shaft 3 and the output are not limited to those having the same structure, and may not be coaxial. An example of a structure in which the shaft 20 is not located coaxially will be described with reference to FIG. However, among the compression unit 2, the electromagnetic clutch 4, and the motor 5, the same parts as those in FIG. 1 of the hybrid compressor 1 are denoted by the same reference numerals, and the description thereof will be omitted.

 In the hybrid compressor 1, the rotating shaft 3 and the output shaft 20 are arranged parallel to each other while being shifted in the radial direction, and a gear having a different gear ratio is provided between the rotating shaft 3 and the output shaft 20. Equipped with a rotational force transmission mechanism consisting of 30 and 31. By combining these gears 30 and 31, it is possible to change the rotational speed of the transmitted rotational force, S, which mutually transmits the rotational force. You can do it. A one-way clutch 23 shown in FIG. 2 is arranged between the output shaft 20 and the hub 21a of the rotor 21. As a result, similarly to the hybrid compressor 1 shown in FIG. 1, when the motor 5 is used as the driving source, the rotational force of the rotor 21 is transmitted to the output shaft 20 and the rotating shaft 3 while When the engine is used as the driving source, the rotating shaft 3 and the output shaft 20 rotate, but the rotating force of the output shaft 20 is not transmitted to the rotor 21 by the one-way clutch 23, so that the rotor 21 rotates. No, the motor 5 does not work as a generator.

 Further, in the hybrid compressor 1, the compressor main body 32 provided with the compression section 2 and the electromagnetic clutch 4 and the motor 5 may be separate bodies, and the structure of the hybrid compressor 1 is shown in FIG. It will be explained based on. However, among the compression unit 2, the electromagnetic clutch 4, and the motor 5, the same parts as those in FIG. 1 of the hybrid compressor 1 are denoted by the same reference numerals, and the description thereof will be omitted.

As described above, the compressor body 32 has the rotating shaft 3 on which the electromagnetic clutch 4 and the compression section 2 are fixed, and the pulley 33, which is fixed on the rotating shaft 3. In contrast, in this embodiment, the motor 5 This is an inner rotor type brushless motor composed of a rotor 21 fixed to a force shaft 20 and a stator 19 fixed to the housing member 34 side. The rotor 21 is composed of a rotor body 35 protruding radially from the outer periphery of the output shaft 20 and a permanent magnet 22 formed at a tip of the rotor body 35 in the protruding direction. . Further, the stator 19 is formed by a stator core 36 formed on the inner periphery of the housing member 34 so as to face the rotor 21 and a coil 37 wound around the stator core 36. .

 The output shaft 20 protrudes outside from the housing member 34, and a pulley 39 connected to the pulley 33 via a belt 38 is disposed at the end of the protruding portion. A one-way clutch 23 is arranged between 9 and the output shaft 20. This one-way clutch 23 differs from the one shown in FIG. 2 only in that the clutch outer 24 is fixed to the burry 39 instead of the rotor 21. The description of is omitted.

 Thus, when the motor is used as the drive source, the rotational force of the rotor 21 is transmitted from the output shaft 20 to the rotary shaft 3 via the pulley 39 of the motor 5 and the pulley 33 of the compressor section 23. On the other hand, when the engine is used as the driving source, the rotational force is transmitted from the rotating shaft 3 to the pulley 39 of the motor 5 via the pulley 33, but the burry 39 transmits the torque to the output shaft 20 of the motor 5. Since no rotational force is transmitted, the rotor 21 does not rotate and the motor 5 does not work as a generator.

Although not shown, instead of arranging the one-way clutch 23 between the pulley 39 of the motor 5 and the output shaft 20, the pulley 33 of the compressor main body 23 and the rotating shaft 3 are connected. A one-way clutch may be provided for the vehicle. Further, the motor 5 is of an outer rotor type, as in the embodiment of FIG. A one-way clutch may be arranged between the rotor and the output shaft. In this case, the linkage between the rotating shaft 3 and the output shaft 20 is not limited to a configuration in which the burries are connected to each other via a belt. A configuration in which two gears are connected may be used.

 Finally, the description has been given on the assumption that the configuration of the compression unit 2 is a vane type, but a hybrid in which the rotating shaft driving the compression unit and the output shaft of the motor are linked. The present invention can be applied to a rotary compressor or a rotary swash plate type as long as the compressor is a compressor. Industrial applicability

 As described above, according to the present invention, when the motor is used as the drive source, the rotational force of the rotor is transmitted to the output shaft and the rotary shaft, while when the engine is used as the drive source, the rotary shaft Although the shaft rotates, the torque of the output shaft is not transmitted to the rotor by the one-way clutch. As a result, the rotor does not rotate and does not generate power, preventing the battery for storing the electricity generated by the rotation of the rotor or the electricity generated by the rotation of the rotor from being supplied to the motor drive circuit. This eliminates the need for a relay to reduce the size and weight of the equipment, thereby reducing manufacturing costs.

 Further, according to the present invention, when the rotating shaft-output shaft is rotated by using the engine as a drive source, the rotational force of the rotating shaft / output shaft is not transmitted to the motor. However, since the motor does not become a resistance to the rotation of the engine, no load is generated on the engine or the hybrid compressor itself, and furthermore, the driver pity can be improved.

Further, according to the present invention, when the motor is used as a drive source, the rotor Is transmitted from the output shaft to the rotating shaft via the motor pulley and the second pulley of the compression unit, while when the engine is used as a driving source, the rotating shaft passes through the second pulley from the rotating shaft. The torque is transmitted to the motor pulley, but the torque is not transmitted from the motor pulley to the motor output shaft. As a result, the rotor does not rotate and thus does not generate power, and prevents a battery for storing electricity generated by the rotation of the rotor and electricity generated by the rotation of the rotor from being supplied to the motor drive circuit. This eliminates the need for relays, reduces the size and weight of the equipment, and reduces manufacturing costs.

Still further, according to the present invention, when the rotating shaft is rotated by the engine as a driving source, the rotating force of the rotating shaft is not transmitted to the output shaft and the rotor of the motor, so that the motor is driven by the engine. Since there is no resistance to rotation, there is no load on the engine or the hybrid compressor itself, and further improvement in driver piracy can be _achieved.

Claims

The scope of the claims 1. The rotation axis,  A compression unit driven by the rotation of the rotating shaft;  A pulley that is mounted on one side of the rotating shaft with respect to the compression section, and that transmits the rotation of the engine, and selectively couples the bully and the rotating shaft to transmit the rotation of the engine to the rotating shaft. And a motor configured to drive the compression section, comprising an output shaft, a stator, and a rotor, wherein at least one rotational force is applied between the output shaft and the rotor. A hybrid compressor characterized by a one-way clutch that transmits the signal to the other side.  2. The hybrid compressor according to claim 1, wherein the output shaft and the rotation shaft are connected coaxially. 3. The device according to claim 1, wherein the output shaft and the rotation shaft are arranged on different shafts, and a rotation transmission mechanism is provided between the output shaft and the rotation shaft. High-performance compressor. 4. The rotation axis,  A compression unit driven by the rotation of the rotating shaft; A pulley, which is mounted on one side of the rotary shaft with respect to the compression section and transmits the rotation of the engine, and selectively connects the pulley and the rotary shaft to transmit the rotation of the engine to the rotary shaft. A hybrid compressor comprising at least an electromagnetic clutch, an output shaft, a stator, and a rotor configured to drive the compression unit, the compressor including the electromagnetic clutch and the compression unit, and the motor. Separately disposed, a pulley is provided on the output shaft of the motor, A second pulley, which is different from the electromagnetic clutch pulley, is provided on the compressor body, and the motor pulley and the compressor main body second pulley are connected by connecting means. A hybrid compressor comprising a one-way clutch that transmits only one rotational force to the other.