JP2005330876A - Compressor with transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor with a transmission capable of reducing in size and weight. <P>SOLUTION: The compressor with the transmission comprises a housing 10, a compression mechanism 40 constructed in the housing 10 for compressing a refrigerant and a friction type transmission mechanism 301 constructed in the housing for speed-variably driving the compression mechanism 40. The friction type transmission mechanism 301 has an input shaft 171 supported rotatably about an axis O1, an output shaft 24 supported rotatably about the axis O1 for driving the scroll type compression mechanism 40, a planetary rotator 271 provided between the input shaft 171 and the output shaft 24 for transmitting torque of the input shaft 171 to the output shaft 24 and for transmitting a rotation speed of the input shaft 171 to the output shaft 24 while increasing or decreasing it, and so forth. The scroll type compression mechanism 40 has a fixed scroll 41 and a movable scroll 42. The output shaft 24 is not positioned in a radial direction by the housing 10 and is positioned in the radial direction by the input shaft 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a compressor with a transmission.

  FIG. 1 of Patent Document 1 discloses a conventional compressor with a transmission. Since the compressor with a transmission is used in an air conditioner or the like mounted on a vehicle, a compression mechanism capable of compressing a refrigerant and a friction transmission mechanism capable of shifting and driving the compression mechanism are provided. It is configured in a housing. Since the compressor and the friction transmission mechanism are integrally formed in the housing, the entire compressor with the transmission is downsized as compared with the case of using an individual compressor and the friction transmission. ing.

  The friction type speed change mechanism shown on the left side in the housing uses a planetary rotor in this conventional example. The friction transmission mechanism includes an input shaft, an input disk, an output disk, an output shaft, a carrier, a planetary rotor, a transmission ring, and the like. In this friction transmission mechanism, when the input shaft is driven by the engine or motor, the integrated input disk also rotates, and the planetary rotor pressed by the input disk revolves around the axis of the input shaft. Rotate. At this time, the output disk can be rotated at a desired acceleration / deceleration ratio by moving the position of the transmission ring that contacts the planetary rotor. As a result, the friction transmission mechanism can drive the output shaft at a desired rotational speed.

  The compression mechanism shown on the right side in the housing is of a vane type in this conventional example. This compression mechanism includes an output shaft, a rotor, a vane, a pump housing, and the like. In this compression mechanism, when the output shaft is driven, the rotor connected to the output shaft is also driven, and the vanes appear and disappear from the rotor in the radial direction within the pump housing. Thereby, in this compression mechanism, the volume of the compression chamber comprised by the adjacent vane, rotor, and pump housing is fluctuate | varied, and a refrigerant | coolant can be compressed.

  For this reason, the compressor with a transmission as described above is mounted on a vehicle, for example, so that the rotational speed of the compression mechanism is appropriate for the drive input from the engine whose rotational speed changes depending on the traveling speed. As a result, it is possible to maintain a comfortable in-vehicle temperature.

JP-A-1-35163

  However, for example, needs for improving the comfort and fuel consumption of vehicles are increasing, and a compressor with a transmission is required to be further downsized and light. In other words, when a compressor with a transmission is mounted on a vehicle, for example, due to the recent demand for a comfortable cabin, the cabin is large, while the engine compartment is becoming increasingly narrow due to the relationship with other accessories. If it is not a small compressor with a transmission, it is difficult to mount it on a vehicle. Further, if the vehicle including the transmission-equipped compressor is reduced in weight, fuel efficiency is improved.

  In this respect, since the conventional compressor with a transmission employs a vane compression mechanism, a long compression chamber must be employed in the axial direction in order to ensure sufficient refrigerating capacity. Since the vane type compression mechanism supports the output shaft by providing radial bearings on both sides of the compression chamber which is long in the axial direction, the output shaft is also long in the axial direction. Since the rotor is rotated, the output shaft is not tilted and the span of the radial bearings must be widened in order to keep the rotor rotating smoothly. For this reason, this compressor with a transmission has a restriction | limiting in size reduction.

  For this reason, it is also conceivable to employ a scroll compression mechanism instead of the vane compression mechanism as the speed change mechanism. The scroll type compression mechanism has a fixed scroll having a fixed side plate and a fixed spiral part, a movable side plate and a movable spiral part meshing with the fixed scroll in the axial direction, and revolves around an axis by an output shaft in a state where rotation is restricted. It has a movable scroll which is driven so as to form a compression chamber with the fixed scroll. In this scroll type compression mechanism, since the compression chambers are formed in a superposed manner at the same position in the axial direction, sufficient refrigeration capacity can be exhibited without increasing the length of the compression chamber in the axial direction. . For this reason, according to this scroll type compression mechanism, it is thought that size reduction of a compressor with a transmission can be realized more.

  However, in the scroll compression mechanism, the output shaft can be arranged only on one side of the movable scroll. Therefore, when the axial length of the compressor with a transmission is to be shortened by adopting the scroll type compression mechanism, as with the general scroll type compressor disclosed in Japanese Patent No. 3498535, it is simply a wide span. If the two radial bearings are provided on the output shaft, even if the compression chamber is shortened in the axial direction, the output shaft itself becomes longer in the axial direction, which ultimately reduces the size of the compressor with a transmission. I will be against it.

  In addition, while adopting a scroll type compression mechanism, a radial bearing is provided between the output shaft and the housing, and when positioning the output shaft in the radial direction, a flange protruding inward from the housing is provided. If a radial bearing is provided between the flange and the output shaft, or if the output shaft is enlarged and the radial bearing is provided between the output shaft and the housing, the flange or the large-diameter output shaft is equipped with a transmission. An increase in the weight of the compressor is inevitable. In particular, when the diameter of the output shaft is increased, the radial bearing is also increased in size, and this tendency becomes remarkable.

  The present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a compressor with a transmission that can be reduced in size and weight.

A compressor with a transmission according to the present invention includes a housing, a compression mechanism configured in the housing and capable of compressing a refrigerant, and a friction transmission mechanism configured in the housing and capable of shifting and driving the compression mechanism. And
The friction transmission mechanism includes an input shaft that is rotatably supported around an axis, an output shaft that is rotatably supported around the axis and can drive the compression mechanism, the input shaft, and the output shaft. And a speed change means capable of transmitting to the output shaft by increasing or decreasing the rotational speed of the input shaft while transmitting the torque of the input shaft to the output shaft. In
The compression mechanism includes a fixed scroll having a fixed side plate and a fixed spiral portion, a movable side plate and a movable spiral portion meshing with the fixed scroll in the axial direction, and is rotated around the axis by the output shaft in a state where rotation is restricted. A movable scroll that is driven to revolve and forms a compression chamber with the fixed scroll;
The output shaft is not positioned in the radial direction depending on the housing, but is positioned in the radial direction by the input shaft.

  The compressor with a transmission of the present invention employs a scroll type compression mechanism in which the compression chamber is short in the axial direction.

  Further, in this compressor with a transmission, the input shaft is provided with a radial positioning function instead of providing a radial bearing on the housing to support the output shaft. For this reason, it is not necessary to support the output shaft itself with two radial bearings having a wide span, and the output shaft itself can be shortened in the axial direction.

  Furthermore, this compressor with a transmission is positioned in the radial direction of the output shaft by the input shaft, so there is no need to increase the diameter of the flange projecting inward from the housing or the diameter of the output shaft, resulting in an increase in weight. Absent. Although it is necessary to provide a radial bearing between the input shaft and the output shaft, this radial bearing only needs to have a small diameter and does not increase in size and weight.

  Therefore, the compressor with a transmission according to the present invention is reduced in size and weight. For this reason, this compressor with a transmission can achieve, for example, excellent mountability on a vehicle and can improve the comfort of the vehicle. Moreover, if this compressor with a transmission is mounted on a vehicle, excellent fuel efficiency can be achieved by reducing the weight of the vehicle.

  In the compressor with a transmission according to the aspect of the invention, the compression mechanism may include a drive bush that revolves the movable scroll through a radial bearing, and the output shaft may be eccentrically fitted to an axis of the drive bush. Thereby, the movable scroll can be revolved around the axis.

In the compressor with a transmission according to the present invention, the compression mechanism has a drive rotor provided integrally with the drive bush,
The friction transmission mechanism is provided integrally with the output shaft, and has an output rotor that can face the drive rotor;
A sealing material for sealing the compression mechanism and the friction transmission mechanism can be installed between the drive rotor and the housing or between the output rotor and the housing.

  The effect brought about by the installation of the sealing material will be described based on the prior art described above. In the conventional compressor with a transmission shown in FIG. 1 of Patent Document 1, the space in the housing in which the friction transmission mechanism is installed also has a function as a suction chamber. Therefore, the refrigerant flowing from the suction port passes through the periphery of the friction transmission mechanism, is compressed in the compression chamber, and is then discharged from the discharge port.

  At that time, the refrigerating machine oil is dispersed in a mist state in the refrigerant, and the refrigerant supplies oil to the movable parts of the friction transmission mechanism and the compression mechanism at the same time. Here, since the refrigeration oil is dispersed in the refrigerant and circulates through the compressor, condenser and evaporator constituting the air conditioning equipment, the desired properties (viscosity, lubricity, etc.) can be obtained over a wide range from the low temperature range to the high temperature range. Must demonstrate.

  On the other hand, a traction oil suitable for power transmission between rotating bodies in frictional contact is generally used for a friction transmission as a single unit.

  Therefore, in the conventional compressor with a transmission, it is necessary to select a refrigerating machine oil having high power transmission performance in the rotating body of the friction transmission mechanism. As a result, in this compressor with a transmission, expensive refrigeration oil must be used, which increases costs.

  On the other hand, the compressor with a transmission according to the present invention has a seal material between the drive rotor and the housing or between the output rotor and the housing. With this sealing material, the compression mechanism and the friction transmission mechanism can be sealed. For this reason, the spaces of the friction transmission mechanism and the compression mechanism are discontinuous, and it is possible to use dedicated oils. For this reason, the refrigerating machine oil or traction oil according to a required function can be selected so that it may become a suitable material suitable place. In particular, in the friction transmission mechanism, a relatively low-priced traction oil can be used, which reduces the cost. On the other hand, since the compressor mechanism can use relatively inexpensive refrigeration oil, the cost is reduced. In addition, since the power transmission performance of the friction transmission mechanism is improved as compared with the case of using refrigeration oil, the energy efficiency of the entire air conditioner is also improved.

  The sealing material can be provided between the drive rotor and the housing or between the output rotor and the housing. In addition, since the sealing material is provided by effectively using a gap between the drive rotor, the output rotor, and the housing, the length in the axial direction of the compressor with a transmission is not increased.

  In the compressor with a transmission according to the present invention, a thrust bearing may be provided between the drive rotor and the housing, and the thrust shaft may have the sealing material.

  In this case, by using a thrust bearing integrated with a seal material, it is possible to easily provide the seal material without the need for processing the housing for installing the seal, and to reduce the number of parts. Therefore, the manufacturing cost can be reduced.

  Embodiments 1 to 4 embodying the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the compressor with a transmission according to the first embodiment is a compressor with a transmission as a friction transmission mechanism 301 integrated with a scroll compression mechanism 40. This compressor with a transmission is mounted on a vehicle, for example, and constitutes an air conditioner.

  The compressor with a transmission includes a housing 10 including a front housing 11, a center housing 12, a shell 13, and a rear housing 14. The front housing 11 and the center housing 12 are fastened together to form a transmission chamber 10a. The shell 13 integrally has a fixed scroll 41 described later, and a movable scroll 42 described later is provided between the center housing 12 and the shell 13.

  The shell 13 and the rear housing 14 are fastened together to form a suction chamber 51 and a discharge chamber 52 therein.

  A boss 11a is formed in the front housing 11, and an input shaft 171 whose front end is positioned in the boss 11a is rotatable around the first axis O1 via the seal member 15 and the radial bearing 16 in the boss 11a. It is supported. An input rotor 181 is press-fitted into the input shaft 171, and a thrust bearing 19 is provided between the front end surface of the input rotor 181 and the front housing 11. A pressing surface 181 a is formed at a portion of the input rotor 181 facing the rear side on the outer peripheral side.

  Further, in the speed change chamber 10a, at least three planetary rotors 271 are cantilevered by the first carrier 201 and the second carrier 202 so as to be able to rotate around the second axis O2 inclined with respect to the first axis O1. It is supported. Specifically, the first carrier 201 has a bearing metal 204 at a fitting portion with the input shaft 171 and is supported rotatably around the first axis O1. Further, the second carrier 202 is integrated with the first carrier 201 and has a bearing metal 203 that rotatably supports the shaft at one end of the planetary rotor 271. Therefore, the planetary rotor 271 can revolve around the first axis O1 and rotate around the second axis O2.

  The planetary rotor 271 includes a cylindrical passive surface 271a that contacts the pressing surface 181a of the input rotor 181; a transmission surface 271b that contacts a pressing surface 26a of the transmission ring 26 described later; and an output rotor 251 described later. An operating surface 271c that contacts the pressing surface 251a is formed. At this time, each planetary rotor 271 is pressed by the input rotor 181, the output rotor 251 and the transmission ring 26.

  Further, in the speed change chamber 10a, the output shaft 24 is inserted into the input shaft 171 via the bearing metal 23, and is supported so as to be rotatable around the first axis O1. An output rotor 251 extending in the radially outward direction is integrally formed on the second carrier 202 side of the output shaft 24. A pressing surface 251 a is formed at a portion facing the outer peripheral end of the output rotor 251.

  The center housing 12 is formed with a cylinder chamber 12a that is parallel to and concentric with the first axis O1, and that opens to the front housing 11 side. A cylindrical transmission ring 26 is accommodated in the cylinder chamber 12a so as to be able to reciprocate. A cylindrical pressing surface 26 a is formed on the inner periphery on the distal end side of the transmission ring 26. Seal rings 26b and 26c are attached to the outer peripheral surface and the inner peripheral surface on the rear side of the transmission ring 26.

  A guide surface 11b is formed on the inner peripheral surface of the front housing 11 to guide the outer peripheral surface of the transmission ring 26 protruding from the cylinder chamber 12a toward the transmission chamber 10a. The front end of the guide surface 11b is the front end of the transmission ring 26. The stopper surface 11c is in contact with the tip surface.

  The output shaft 24 is eccentric and press-fitted with respect to the cylindrical drive bush 43. On the output rotor 251 side of the drive bush 43, a drive rotor 44 extending in the radially outward direction is integrally formed so as to face the output rotor 251. In addition, a groove (not shown) whose depth decreases in the circumferential direction is formed in the rear end surfaces of the drive rotor 44 and the output rotor 251, while the front end surface of the drive rotor 44 is provided on the rear end surface of the output rotor 251. A groove paired with a groove (not shown) is recessed. In these grooves, cylindrical rollers whose axial direction is the radial direction of the compressor with a transmission are housed. In this compressor with a transmission, six sets of grooves and rollers are provided at equal intervals in the circumferential direction, and the pressure adjusting means 29 is constituted by all the grooves and rollers. The drive rotor 44 also serves as a balance weight.

  The friction transmission mechanism 301 includes the housing 10, the input shaft 171, the input rotor 181, the first and second carriers 201 and 202, the output shaft 24, the output rotor 251, each planetary rotor 271, the transmission ring 26, the pressure adjusting means 29, and the like. Is configured.

  As shown in FIG. 1, the center housing 12 is formed with an inner flange 12b protruding toward the drive bush 43, and a thrust bearing is provided between the rear end surface of the drive rotor 44 and the front end surface of the inner flange 12b. 45 is provided. The thrust bearing 45 has a sealing material 60 on the inner diameter side. On the other hand, a movable scroll 42 is provided between the inner flange 12 b and the shell 13 on the outer peripheral surface of the drive bush 43 via a radial bearing 46.

  The movable scroll 42 includes a boss 42a provided with a radial bearing 46, a disk-shaped movable side plate 42b extending in the radial direction, and extending from the movable side plate 42b in parallel with the first axis O1. In addition, it is composed of a spiral movable spiral part 42c that is integrally projected rearward. A tip seal 42d made of PTFE (polytetrafluoroethylene) is provided at the tip of the movable spiral part 42c.

  Three or more fixed pins 47 are fixed to the rear end surface of the inner flange 12b in parallel with the first axis O1, and the same number of movable pins 48 as the fixed pins 47 are first on the movable side plate 42b of the movable scroll 42. It is fixed parallel to the axis O1. In addition, a movable ring 49 in which the same number of through holes 49a as the fixed pins 47 and the movable pins 48 are formed is provided between the inner flange 12b and the movable side plate 42b. 48 is accommodated in the through-hole 49a in a state where the revolving distance is set between the respective shaft cores. The fixed pin 47, the movable pin 48, and the movable ring 49 constitute a rotation prevention means 50.

  The shell 13 integrally has a fixed scroll 41. The fixed scroll 41 includes a disk-shaped fixed side plate 41b extending in the radial direction, and a spiral fixed spiral portion 41c that protrudes integrally and forward from the fixed side plate 41b in parallel with the first axis O1. A tip seal 41d made of PTFE is also provided at the tip of the fixed spiral part 41c.

  The fixed spiral portion 41c of the fixed scroll 41 and the movable spiral portion 42c of the movable scroll 42 are set to have the same protruding length in the first axis O1 direction, and the fixed spiral portion 41c of the fixed scroll 41 passes through the tip seal 41d. The movable scroll 42 slides with the movable side plate 42b, and the movable scroll 42c of the movable scroll 42 slides with the fixed side plate 41b of the fixed scroll 41 via the tip seal 42d.

  A discharge port 52a is provided in the central portion of the fixed side plate 41b so as to communicate with the discharge chamber 52. In the discharge chamber 52, the discharge valve 53 and the retainer 54 are fixed to the fixed side plate 41 so as to close the discharge port 52a. Has been. A suction port 51a communicating with the suction chamber 51 is provided through the outer peripheral portion of the fixed side plate 41b.

  The scroll compression mechanism 40 is configured by the housing 10, the output shaft 24, the drive bush 43, the drive rotor 44, the movable scroll 42, the rotation preventing means 50, the fixed scroll 41, and the like.

  In the compressor with a transmission according to the first embodiment configured as described above, if the input shaft 171 of the friction transmission mechanism 301 is rotationally driven around the first axis O1 by the engine or motor of the vehicle, the input rotor 181 also rotates at the same time. Then, when the pressing surface 181a of the input rotor 181 presses each passive surface 271a, each planetary rotor 271 rotates around the second axis O2 while revolving around the first axis O1, and each operating surface. The output rotor 251 pressed by 271c rotates reversely around the first axis O1. Thereby, the rotation of the output rotor 251 is transmitted to the output shaft 24.

  Therefore, in the scroll compression mechanism 40, when the output shaft 24 is driven to rotate, the drive bush 43 rotates around the first axis O1 eccentric to its own axis, and the movable scroll 42 rotates to prevent rotation 50. Revolves in a state where rotation is regulated by. Thereby, the volume of the compression chamber formed between the fixed scroll 41 and the movable scroll 42 is reduced from the outer peripheral side toward the central portion. As a result, the refrigerant in the suction chamber 51 is compressed in the compression chamber, discharged to the discharge chamber 52, and then supplied to the condenser and the evaporator, thereby realizing air conditioning such as cooling.

  At this time, in the friction transmission mechanism 301, if the transmission ring 26 is in frictional contact with the small-diameter side of the transmission surface 271b of each planetary rotor 271, each planetary rotor 271 rotates at a high speed and rotates at the first axis at a low speed. Since it revolves around O1, the output shaft 24 rotates at a high speed. Further, if the transmission ring 26 is in frictional contact with the large diameter side of the transmission surface 271b of each planetary rotor 271, each planetary rotor 271 revolves around the first axis O1 at high speed while rotating at high speed. Therefore, the output shaft 24 rotates at a low speed.

  During this time, the pressure adjusting means 29 causes the grooves provided in both the output rotor 251 and the drive rotor 44 to be shallower in accordance with the torque that each roller acts between the output rotor 251 and the drive rotor 44. It rolls and urges the output rotor 251 toward each planetary rotor 271 side. For this reason, the input rotor 181, the transmission ring 26 and the output rotor 251 are urged to the planetary rotors 271 by an urging force corresponding to the torque, and relative sliding between each planetary rotor 271 is prevented.

  Thus, in this compressor with a transmission, the friction transmission mechanism 301 can transmit the torque of the input shaft 171 to the output shaft 24 while increasing or decreasing the rotational speed of the input shaft 171 and transmit it to the output shaft 24. In the scroll compression mechanism 40, the compression capacity is controlled.

  Here, in this compressor with a transmission, the scroll-type compression mechanism 40 is employed, and the compression chamber is formed in an overlapping manner at the same position in the direction of the first axis O1, and therefore the axial length of the compression chamber. Even if the size is not so large, a sufficient refrigerating capacity can be exhibited. For this reason, this compressor with a transmission has a short axial length.

  In this compressor with a transmission, the output shaft 24 is not positioned in the radial direction depending on the housing 10, but is positioned in the radial direction by the input shaft 171. Since the input rotor 181 is press-fitted and integrated with the input shaft 171, the input shaft 171 is not only rotatably supported by the radial bearing 16 but also by the thrust bearing 19 with respect to the first axis O 1. It is supported so as not to tilt. Further, since the thrust bearing 19 supports the thrust load near the outer periphery of the input rotor 181, the input shaft 171 is reliably prevented from being inclined with respect to the first axis O <b> 1. Further, the input shaft 171 integrated with the input rotor 181 is always pressed against the thrust bearing 19 from the pressure adjusting means 29 through the output rotor 251 and the planetary rotor 271 at a suitable pressure during rotation.

  Therefore, the rear end portion of the input shaft 171 is not shaken by rotation. As a result, the output shaft 24, which is rotatably inserted into the rear end portion of the input shaft 171 and positioned in the radial direction, can smoothly rotate around the first axis O1 without shaking. As a result, this compressor with a transmission does not require the output shaft 24 itself to be supported by two radial bearings with a wide span, and the output shaft 24 itself is shortened in the axial direction.

  Further, this compressor with a transmission does not require an increase in the diameter of the flange 12b protruding inward from the center housing 12 or the output shaft 24, and does not increase the weight. Although a bearing metal 23 is provided between the input shaft 171 and the output shaft 24, the bearing metal 23 has a small diameter and does not increase in size and weight.

  Therefore, this compressor with a transmission can be reduced in size and weight. For this reason, this compressor with a transmission can achieve, for example, excellent mountability on a vehicle and can improve the comfort of the vehicle. Moreover, if this compressor with a transmission is mounted on a vehicle, excellent fuel efficiency can be achieved by reducing the weight of the vehicle.

  Further, in this compressor with a transmission, the scroll compression mechanism 40 and the friction transmission mechanism 301 are sealed by the seal material 60, so that the spaces of the friction transmission mechanism 301 and the scroll compression mechanism 40 are not sufficient. It becomes continuous, and it is possible to use dedicated oil for each.

  In particular, the scroll compression mechanism 40 circulates through a condenser, an expansion valve, and an evaporator that constitute other air conditioning equipment in a state where oil is dispersed in the refrigerant. Therefore, desired properties can be obtained in a wide range from a low temperature range to a high temperature range. It is possible to select an optimal refrigerating machine oil that can exhibit (viscosity, lubricity, etc.). On the other hand, the friction transmission mechanism 301 can use traction oil suitable for power transmission between the input rotor 181, the output rotor 251, the transmission ring 26 and the planetary rotor 271 that are in frictional contact. .

  As a result, in this compressor with a transmission, the refrigerating machine oil and the traction oil corresponding to the required function can be selected so that the proper material is suitable. In particular, the friction transmission mechanism 301 can use a relatively low-priced traction oil, and thus can reduce costs. On the contrary, the scroll type compression mechanism 40 can also use a relatively low-priced refrigerating machine oil, so that the cost can be reduced. Moreover, since the power transmission performance of the friction transmission mechanism 301 is improved as compared with the case of using refrigeration oil, it is apparent that the energy efficiency of the entire air conditioning equipment is also improved.

  Moreover, in this compressor with a transmission, since the sealing material 60 is provided by effectively using the gap between the drive rotor 44 and the flange 12b, the length in the axial direction is not increased.

  Furthermore, in this compressor with a transmission, the seal material 60 is formed integrally with the thrust bearing 45. For this reason, it is not necessary to process a housing or the like for installing the seal, the seal material 60 can be easily provided, and the assembly cost can be reduced. In addition, the management cost can be reduced by reducing the number of parts. For this reason, the manufacturing cost of this compressor with a transmission is low.

  The material and shape of the sealing material 60 satisfy the required functions such as chemical resistance, heat resistance, durability, wear resistance, etc., such as being difficult to swell and deteriorate with a refrigerant (generally HFC134a etc.) or lubricating oil. Various selections are possible.

  In particular, since refrigerant easily deteriorates rubber, materials using various materials have been developed as bearing seals for air conditioners. For example, it is possible to select HNBR (hydrogenated nitrile rubber) or the like excellent in refrigerant performance as a sealing material. In addition, it is also possible to select a suitable sealing material according to the use conditions and cost of the air conditioner, such as a sealing material in which PTFE (polytetrafluoroethylene) and HNBR (hydrogenated nitrile rubber) are combined and integrated. It is.

  Further, regarding the frictional transmission mechanism 301 shown in FIG. 1, the power transmission path and its form are not limited to the form shown in the figure as long as it is a frictional transmission mechanism. For example, regarding power transmission between the pressing surface 181a of the input rotor 181 and the passive surface 271a of the planetary rotor 271, in addition to friction transmission by surface contact, a combination of gears and surface contact may be used. Further, the speed change means of the friction type speed change mechanism 301 may also be a half toroidal type in addition to the planetary rotor type shown in the figure. Furthermore, needless to say, it is possible to select optimal parts as appropriate, such as a bearing metal, a ball bearing, and a roller bearing.

  As shown in FIG. 2, the compressor with a transmission according to the second embodiment includes a seal material 601 between the drive rotor 44 and the flange 12b. Since the configuration other than the above is the same as that of the compressor with a transmission according to the first embodiment, detailed description thereof is omitted.

  In this compressor with a transmission, the scroll-type compression mechanism 40 and the friction-type transmission mechanism 301 can be sealed by the sealing material 601 between the drive rotor 44 and the flange 12b. For this reason, each space of the friction type speed change mechanism 301 and the scroll type compression mechanism 40 becomes discontinuous, and it becomes possible to use dedicated oil respectively. Other functions and effects are the same as those of the first embodiment.

  The compressor with a transmission according to the third embodiment includes a sealing material 602 between the output rotor 251 and the flange 12b as shown in FIG. In this case, it is desirable to arrange an O-ring 603 in order to more reliably seal between the output shaft 24 and the drive rotor 44. Since the configuration other than the above is the same as that of the compressor with a transmission according to the first embodiment, detailed description thereof is omitted.

  This transmission-equipped compressor also has the same operational effects as the second embodiment.

  The present invention can be used for an air conditioner mounted on a vehicle.

It is sectional drawing of the compressor with a transmission of Example 1. FIG. It is a principal part expanded sectional view of the compressor with a transmission of Example 2. FIG. It is a principal part expanded sectional view of the compressor with a transmission of Example 3. FIG.

Explanation of symbols

10 ... Housing (11 ... Front housing, 12 ... Center housing, 13 ... Shell, 14 ... Rear housing)
DESCRIPTION OF SYMBOLS 40 ... Scroll-type compression mechanism 301 ... Friction-type transmission mechanism O1 ... 1st axis 171 ... Input shaft 24 ... Output shaft 271, 181, 251, 26 ... Transmission means (271 ... Planetary rotor, 181 ... Input rotor, 251 ... Output rotor, 26 ... shift ring)
DESCRIPTION OF SYMBOLS 41 ... Fixed scroll 41b ... Fixed side board 41c ... Fixed spiral part 42 ... Movable scroll 42b ... Movable side board 42c ... Movable spiral part 43 ... Drive bush 44 ... Drive rotor 60 ... Sealing material 45 ... Thrust bearing

Claims (4)

A housing, a compression mechanism configured in the housing and capable of compressing the refrigerant, and a friction transmission mechanism configured in the housing and capable of driving the compression mechanism by shifting the speed;
The friction transmission mechanism includes an input shaft that is rotatably supported around an axis, an output shaft that is rotatably supported around the axis and can drive the compression mechanism, the input shaft, and the output shaft. And a speed change means capable of transmitting to the output shaft by increasing or decreasing the rotational speed of the input shaft while transmitting the torque of the input shaft to the output shaft. In
The compression mechanism includes a fixed scroll having a fixed side plate and a fixed spiral portion, a movable side plate and a movable spiral portion meshing with the fixed scroll in the axial direction, and is rotated around the axis by the output shaft in a state where rotation is restricted. A movable scroll that is driven to revolve and forms a compression chamber with the fixed scroll;
The transmission-equipped compressor, wherein the output shaft is not positioned in the radial direction depending on the housing, but is positioned in the radial direction by the input shaft.   The said compression mechanism has a drive bush which revolves the said movable scroll via a radial bearing, The said output shaft is eccentrically fitted to the axial center of this drive bush, The Claim 1 characterized by the above-mentioned. Compressor with transmission. The compression mechanism has a drive rotor provided integrally with the drive bush,
The friction transmission mechanism is provided integrally with the output shaft, and has an output rotor that can face the drive rotor;
The seal material for sealing the compression mechanism and the friction transmission mechanism is provided between the drive rotor and the housing or between the output rotor and the housing. 2. A compressor with a transmission according to 2.   The compressor with a transmission according to claim 3, wherein a thrust bearing is provided between the drive rotor and the housing, and the thrust bearing has the sealing material.

Images