JPH05118276A - Compressor with speed changer for automobile air conditioning device - Google Patents

Abstract

PURPOSE:To provide a compressor with a gear box for an automobile air conditioning device which cools lubricating oil without using an exclusive oil cooling device, and prevents the lowering of the coefficient of traction of the lubricating oil. CONSTITUTION:A gear box 20 in a compressor with a gear box for an automobile air conditioning device is provided with an oil reservoir 22 to store operating oil to lubricate the gear box, and the oil reservoir 22 is connected to the route of a hydraulic circuit 111 to connect other hydraulic working auxiliary machinery such as a hydraulic motor or the like and a hydraulic pump 112 for using it as a reservoir tank, and the hydraulic circuit 111 is provided with an oil cooler 116, and the operating oil is made to circulate through the hydraulic circuit 111 and cooled. Since the oil reservoir of the gear box is used as the reservoir tank on the hydraulic circuit, the structure of the hydraulic circuit can be simplified, and in addition, since the operating oil in the oil reservoir is cooled by the oil cooler on the hydraulic circuit, the coefficient of traction of lubricating oil can be kept at high value, and the compressor can dispense with a special operating oil cooling device, and reduce the number of components for improving loading ability onto the automobile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor with a transmission of an air conditioner for an automobile, and more particularly to a cooling means for lubricating oil of the transmission.

[0002]

2. Description of the Related Art Generally, a refrigerant compressor used in an air conditioner for an automobile is driven by an engine for traveling mounted on the automobile as a power source. Therefore, the input rotational speed of the compressor depends on the traveling condition of the automobile. There are large fluctuations, and therefore the compression capacity of the compressor also changes according to the rotational speed of the automobile engine. Therefore, there is a problem that the cooling capacity of the air conditioner changes according to the rotation speed of the automobile engine.

In order to improve this, Japanese Patent Laid-Open No. 62-170.
A compressor with a transmission as shown in Japanese Patent No. 787 has been proposed. This type of compressor with a transmission has a structure in which a continuously variable transmission is connected to an input shaft and a compressor is connected in series to this transmission.

According to this, by controlling the gear ratio of the transmission, the rotation speed of the compressor can be controlled regardless of the fluctuation of the rotation speed of the engine. Therefore, the transmission speed of the transmission can be controlled according to the cooling load. By controlling the gear ratio steplessly from "0 to maximum", it becomes possible to secure the required cooling capacity without fluctuations on the engine side, and it is possible to use the high-efficiency rotation range of the compressor with high frequency. There are advantages that power can be saved and that by controlling excessive high speed rotation, quiet and highly durable operation becomes possible.

[0005]

By the way, in this type of compressor with a transmission, heat is generated due to friction on the transmission side. In particular, in low-speed high-load operation such as engine idling or climbing, the heat load of the refrigeration cycle increases, so the gear ratio is increased to increase the cooling capacity.However, if the gear ratio is increased, The power transmission loss increases, friction heat increases, and the transmission temperature rises.

Normally, the transmission portion is adapted to be lubricated by being immersed in the lubricating oil stored in the oil reservoir formed in the casing, which prevents an increase in friction resistance and prevents friction heat from increasing. Controls the rise.

However, when the temperature of the transmission rises, the temperature of the lubricating oil also rises, the traction coefficient decreases, the slip ratio of the sliding portion increases, and wear progresses due to a decrease in the oil film thickness. There is a concern that power transmission may not be possible due to abnormal wear of the transmission unit.

In order to prevent the oil temperature of the lubricating oil from rising, a dedicated oil cooling device may be installed to prevent the oil temperature from rising.

However, since the dedicated oil cooling device requires a special oil pump and hydraulic circuit, there is a drawback that the number of parts increases and the mountability on the vehicle deteriorates.

The present invention has been made in view of such a situation, and its purpose is to perform a cooling function of lubricating oil without using a dedicated oil cooling device and appropriately control the oil temperature. Therefore, it is an object of the present invention to provide a compressor with a transmission of an automobile air conditioner capable of preventing a decrease in traction coefficient.

[0011]

In order to achieve the above object, the present invention connects a transmission whose speed ratio is controlled by a refrigerating capacity to an input shaft, and a compressor on the output side of the transmission. The transmission is provided with an oil sump for storing hydraulic oil, and the transmission oil is stored in the oil sump so that the transmission is lubricated. Connected in the middle of the hydraulic circuit connecting the machine and the hydraulic pump, this oil reservoir serves as a reservoir tank for the hydraulic circuit, and the working oil in the oil reservoir is circulated through the hydraulic circuit, and the oil is supplied to the hydraulic circuit. A feature is that a cooler is provided to cool the hydraulic oil.

[0012]

According to the present invention, since the oil sump of the transmission is used as the reservoir tank of the hydraulic circuit, the working oil in the oil sump is circulated in the hydraulic circuit as the hydraulically operated auxiliary machine is operated. In the process, the hydraulic oil is cooled by the oil cooler and the temperature is lowered. That is, the hydraulic oil that lubricates the transmission is cooled by being circulated in the hydraulic circuit, so that the traction coefficient of the hydraulic oil, that is, the lubricating oil can be maintained high. And in this case
Cooling of lubricating oil will be performed by sharing the hydraulic circuit of the hydraulically operated auxiliary machine, and the hydraulic circuit of the hydraulically operated auxiliary machine will also use the oil reservoir of the transmission as a reservoir tank, so the structure is simple Therefore, the number of parts can be reduced, and the mountability on the vehicle is improved.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings.

FIG. 1 is a diagram showing a compressor 1 with a transmission used in a vehicle air conditioner for a vehicle and a hydraulic circuit of a hydraulic motor for driving a radiator fan used as an auxiliary machine of the present invention.

The structure of the compressor with a transmission 1 shown in FIG. 1 will be described later, and in the figure, reference numeral 100 is a vehicle running engine. A drive pulley 11 is provided on the crankshaft of the engine 100.
0 is attached and the hydraulic pump 112 is connected.

The suction-side oil passage 42 of the hydraulic pump 112 is connected to the reservoir tank 22 for storing hydraulic oil, and the discharge-side oil passage is connected to the hydraulic motor 114 via the flow control valve 113. The hydraulic motor 114 drives a blower fan 115 for an air conditioner as an auxiliary machine. The oil passage on the downstream side of the hydraulic motor 114 is the oil cooler 1.
It communicates with the reservoir tank 22 through 16. Therefore, the hydraulic pump 112 and the flow control valve 11
3, an oil passage connecting the hydraulic motor 114, the oil cooler 116, the reservoir tank 22, and the hydraulic pump 112 constitutes a hydraulic circuit 111 for circulating working oil.

Reference numeral 120 denotes a control device, and this control device 1
Reference numeral 20 controls the operation of the entire air conditioner and the engine cooling device. That is, the control device 120 introduces a signal of the refrigerant pressure from the condenser 121 which constitutes the cooling cycle in the air conditioner, introduces a signal of the water temperature from the radiator 122 for cooling the engine, and is provided in the driver's seat. An operation signal and an engine speed signal of the engine 100 are introduced from the air conditioning operation unit 123. Based on these signals, the control device 120 calculates the cooling capacity of the air conditioner, controls the opening degree of the flow rate control valve 113, and controls the gear ratio of the compressor with transmission 1 accordingly.

Therefore, in the case of the hydraulic circuit 111,
When the hydraulic pump 112 is operated, the hydraulic oil sucked from the reservoir tank 22 is sent to the hydraulic motor 114 through the flow control valve 113, and the hydraulic motor 114 causes the blower fan 1 to operate.
Drive 15 The hydraulic oil passing through the hydraulic motor 114 is cooled by the oil cooler 116 and then returned to the reservoir tank 22.

In this case, when the opening degree of the flow control valve 113 is controlled by the control device 120, the amount of hydraulic oil sent to the hydraulic motor 114 is controlled, and therefore the hydraulic motor 1
Since the number of revolutions of 14 changes, the number of revolutions of the blower fan 115 changes, and thus the amount of blown air changes, so that the air conditioning performance can be controlled.

By the way, in the present invention, the reservoir tank 22 is also used as the oil sump portion of the compressor with transmission 1.

Here, the structure of the compressor with transmission 1 is shown in FIG.
Also, description will be made based on FIG.

In the figure, reference numeral 10 is an input shaft of a compressor 1 with a transmission, and a compressor 50 is connected to the input shaft 10 via a transmission 20.

The input shaft 10 has a driven pulley 11, and the driven pulley 11 is the driving pulley 11 shown in FIG.
0 and the endless V-belt 12 are connected. That is,
The driven pulley 11 is driven by the running engine 100 as a power source, thereby driving the transmission-equipped compressor 1.

The transmission 20 is a friction continuously variable transmission using, for example, a planetary cone, which will be described later.

In the present embodiment, the compressor 50 is a vane type compressor. To explain this, reference numeral 51 in the drawing indicates a main housing. The inner surface 52 of the main housing 51 is a slightly distorted cylindrical surface, as shown in FIG. The front end of the main housing 51 is closed by a front plate 53.
A front housing 54 is connected to 3. A suction chamber 55 is formed between the front plate 54 and the front housing 54. The rear end of the main housing 1 is closed by a rear plate 56, and a rear housing 57 is connected to the rear plate 56. An oil separation chamber 58 is formed between the rear plate 56 and the rear housing 57.

The front housing 54, the front plate 53, the main housing 51, and the rear plate 57.
The rear housing 57 is integrally connected by a through bolt 59.

A rotor 60 is housed in the main housing 51. The rotor 60 is eccentrically arranged in the main housing 51, and one end of the rotor 60 has a drive shaft 6
1 is provided, and a support shaft 62 is integrally provided at the other end. The drive shaft 61 and the support shaft 62 are
It is rotatably supported by radial bearings 63 and 64 attached to the front plate 53 and the rear plate 56, respectively. The drive shaft 62 extends through the front housing 55 and is led out to the left side in FIG. 1, and its end is connected to the transmission 20 described later.

As shown in FIG. 3, the rotor 60 has cross-shaped vane grooves 66 formed therein.
Each of the vanes 67 accommodates a vane 67 slidably in the radial direction.

A space surrounded by the inner surface 52 of the main housing 51, the front plate 53, the rear plate 57, the rotor 60 and the respective vanes 67, constitutes a compression chamber 68. With the rotation, these compression chambers 68 ...
Changes the volume. The region where the volume of the compression chambers 68 increases is the suction stroke, and the region where the volume of the compression chambers 68 decreases is the compression stroke and subsequently the discharge stroke.

A discharge chamber housing 70 is attached to the side wall of the main housing 51 so as to face the position where the compression chamber 68 is in the discharge stroke. This discharge chamber housing 70
A discharge chamber 71 is formed therein. A discharge hole 72 is formed in the side wall of the main housing 51 to connect the compression chamber 68 located in the discharge stroke to the discharge chamber 71. The discharge hole 72 is opened and closed by a discharge valve 73 having a check valve structure. It has become so.

The discharge chamber housing 70 is electrically connected to the oil separation chamber 58 formed in the rear housing 57 through the discharge passage 74 formed in the rear plate 56.
The oil separation chamber 58 is connected to the condenser of the refrigeration cycle through a discharge pipe (not shown) attached to the discharge port 75.

A suction hole 76 is formed in the front plate 53 so as to face it when the compression chamber 68 is in the suction stroke. This suction hole 76 communicates with a suction chamber 55 formed in the front housing 54. The suction chamber 55 is connected to an evaporator of a refrigeration cycle from a suction port (not shown) via a suction pipe.

The vane type compressor having the above structure is
When the drive shaft 61 is rotationally driven, the rotor 60 rotates in the main housing 51, and the compression chamber 6
In the process in which the volume 8 expands, the refrigerant introduced from the evaporator of the refrigeration cycle through the suction chamber 55 is sucked into the compression chamber 68 from the suction hole 76. The drawn refrigerant is the compression chamber 6
8 is compressed as the volume decreases, and the discharge valve 73 is pushed open from the discharge hole 72 and discharged into the discharge chamber 71.

The refrigerant is sent from the refrigerant passage 74 to the oil separation chamber 58, and the oil separation chamber 58 is discharged from the discharge port 75.
More discharged to the condenser side of the refrigeration cycle. Therefore, the refrigerant is circulated in the cooling cycle.

Next, the transmission 20 will be described. 21
Is a casing, and the casing 21 is hermetically connected to the peripheral portion of the front housing 54 of the compressor 50 by a bolt (not shown). This casing 2
1 has a substantially cap shape, and an oil reservoir 22 is formed inside. The oil reservoir 22 serves as the reservoir tank shown in FIG. 1 and stores hydraulic oil (lubricating oil). The oil sump portion 22 is attached to the front housing 54.
A seal mechanism 77 provided between the drive shaft 61 and the drive shaft 61 is liquid-tightly separated from the suction chamber 55 on the compressor 50 side.

The input shaft 10 is rotatably supported by a radial bearing 12 on the front side wall of the casing 21. The input shaft 10 corresponds to the compressor 5
It is coaxial with the axis of the drive shaft 61 of 0 and penetrates the side wall of the casing 21.

Reference numeral 13 is a radial bearing for supporting the driven pulley, and 14 is an oil seal provided on the input shaft portion between the driven pulley 11 and the radial bearing 12.

An input disk 24 is attached to the end of the input shaft 10 protruding into the housing 21 so as to rotate integrally therewith.

In opposition to this, an output disc 25 is attached to the projecting end of the drive shaft 61 of the compressor 50 so as to rotate integrally via a transmission disc and a cam disc described later. A plurality of planet cones 26 (only two are shown) are arranged between the input disk 24 and the output disk 25.

The planet cone 26 has a substantially umbrella shape having three transmission surfaces. That is, the planet cone 26 is formed so that the conical portion 27a, the conical bottom surface 27b of the conical portion 27a, the small diameter ring portion 27c formed coaxially with the conical portion 27a, and the ring portion 27c are coaxial. It integrally has the attached mounting shaft 27d.

The conical portion 27a frictionally engages with a speed change ring 30 which will be described later, and the conical bottom surface 27b frictionally engages with the outer peripheral surface of the output disc 25, so that the ring portion 2 having a small diameter is used.
7c is frictionally engaged with the outer peripheral end of the input disk 24.

The planetary cone 26 is rotatably mounted on the cone retainer 28 with its mounting shaft portion 27d having an appropriate clearance. The cone retainer 28 is rotatable with respect to the input shaft 10. Supported by. Therefore, the planet cones 26 ... Can rotate and revolve freely, and the speed change ring 30 frictionally engaged with the cone portion 27a slides along the axial direction of the input shaft 10 to contact the planet cone 26. The position of the point changes from the apex angle to the peripheral portion, and therefore the rotation speed and the revolution speed change, so that the rotation speed transmitted from the input shaft 10 can be changed. In the present embodiment, for example, the rotation is continuously variable in the range of "gear ratio 0 (position near the periphery of the conical portion 27a) to gear ratio 1 (position near the apex angle of the conical portion 27a)". ..

The speed change ring 30 is driven by a drive mechanism 31. The drive mechanism 31 has a drive motor 32 attached to the upper portion of the casing 21, and the drive motor 32 rotates a screw shaft 33 provided on the upper portion of the casing 21. On the upper part of the casing 21, a guide pin 34 is provided along the axial direction of the screw shaft 33, and a cam block 35 is axially slidably attached to the guide pin 34. This cam block 35
Is threadedly engaged with the screw shaft 33.

The drive motor 32 is designed to be operated by a command from the control device 120 shown in FIG. 1. When the drive motor 32 is operated, the screw shaft 33 is rotationally driven to guide the cam block 35 to the guide pin 34. To move in the axial direction. The speed change ring 30 is attached to the cam block 35 so as to be rotatable about the axis of the input shaft 10. The speed change ring 30 is moved integrally with the cam block 35 in the axial direction. There is.

Therefore, the transmission ring 30 frictionally engaged with the conical portion 27a of the planetary cone 26 slides along the axial direction so that the position of the contact point of the planetary cone 26 is between the apex angle and the peripheral portion. The input shaft 10
You can change the rotation speed from. That is, when the speed change ring 30 is frictionally engaged with the peripheral portion of the conical portion 27a of the planetary cones 26 as shown by the arrow H in FIG. 2, the effective contact radius is large and the revolution speed of the planetary cones 26. It is large and the rotation speed is small, and in this case, the gear ratio is close to zero. Further, as the shift ring 30 approaches the apex of the conical portion 27a of the planet cones 26, as shown by the arrow L in FIG. 2, the effective contact radius becomes small, the revolution speed of the planet cones 26 decreases, and The speed increases, in which case the gear ratio approaches 1. Therefore, the gear ratio 0 (the position near the peripheral edge of the conical portion 27a) to the gear ratio 1 (the conical portion 2
The rotation can be continuously changed in the range of (around the apex angle of 7a).

The output disk 25 is the cam disk 3
7 and the transmission disk 38 drive shaft 6 of compressor 50
Tell the rotation to 1. That is, the cam disk 37 is rotatably supported on the input shaft 10 by the radial bearing 39. The output disc 25 and the cam disc 37 are
The plurality of steel balls 41 disposed on the plate surface portions facing each other and the recesses for restricting the movement of the steel balls 41 are dynamically coupled. Further, a plurality of compression coil springs 42 ... Are interposed between the output disk 25 and the cam disk 37.
The output disk 25 is constantly pressed and urged against the planetary cone 26 by the elastic force of 2.

The cam disk 37 and the transmission disk 38 are connected by a screw, and the transmission disk 38 is connected to the compressor 5
The drive shaft 61 of 0 is spline-engaged to rotate integrally with the drive shaft 61.

Therefore, the variable speed rotation output from the output disk 25 is output to the drive shaft 61 of the compressor 50 via the cam disk 37 and the transmission disk 38. A thrust bearing 40 supports the thrust load of the cam disk 37.

The planet cone 26 and the cone retainer 28 are soaked in the hydraulic oil 23 of the oil sump portion 22 formed in the casing 21, and the planetary cone 26 revolves and rotates to rotate the transmission 20. The sliding portion of is wetted with the hydraulic oil 23.

The oil sump portion 22 formed inside the casing 21 is communicated with the oil cooler 116 shown in FIG. 1 by the return pipe 81, and the working oil cooled in the oil cooler 116 passes through the return pipe 81 and accumulates in the oil sump. It is returned to the section (reservoir tank) 22.

Further, the oil sump portion 22 is a suction pipe 8
2 communicates with the hydraulic pump 112 shown in FIG. 1, and the hydraulic pump 112 sucks up the hydraulic oil in the oil sump (reservoir tank) 22 by the suction pipe 82. The amount of hydraulic oil stored in the oil sump 22 is set by the height of the lower end suction port of the suction pipe 82, but the oil surface of the hydraulic oil is sufficient for sliding parts such as the planet cone 26 and the cone retainer 28. The height is set so that it can be lubricated and cooled, for example, higher than the input shaft 10.

The operation of the compressor 1 with a transmission of the automobile air conditioner having such a structure will be described.

When the engine 100 of the automobile is started,
The rotation of the engine 100 is transmitted to the input shaft 10 of the compressor with a transmission 1 via the driving pulley 110, the V belt 12, and the driven pulley 11. As a result, the input rotation is transmitted from the input disk 24 to the planet cone 26, causing the planet cone 26 to rotate and revolve.

A signal is sent from the control device 120 shown in FIG. 1 to the drive motor 32, and the drive motor 32 causes the screw shaft 3 to rotate.
When 3 is rotated, the cam block 35 is guided by the guide pin 34 and moves in the axial direction. Therefore, the planet cone 2
The transmission ring 30 frictionally engaged with the conical portion 27a of No. 6 slides along the axial direction, and the position of the contact point of the planetary cone 26 changes from the apex angle to the peripheral portion. Therefore, the rotation speed from the input shaft 10 is changed and transmitted to the output disc 25, and the changed rotation output to the output disc 25 is transmitted via the cam disc 37 and the transmission disc 38 to the compressor 5.
It is transmitted to the drive shaft 61 of 0, thereby driving the compressor 50.

In the compressor 50, the rotation is transmitted to the drive shaft 61 so that the rotor 60 is connected to the main housing 51.
The refrigerant is sucked into the compression chamber 68 from the suction chamber 55 through the suction hole 76 while the compression chamber 68 is rotated inside and the volume of the compression chamber 68 is expanded with the rotation. The suctioned refrigerant is compressed chamber 68.
Of the discharge valve 7 from the discharge hole 72.
3 is pushed open and discharged into the discharge chamber 71. This refrigerant is
It is sent from the refrigerant passage 74 to the oil separation chamber 58 and discharged from the discharge port 75 of the oil separation chamber 58 to the condenser side of the refrigeration cycle.

When the cooling capacity of the cooling cycle is required to be high, the transmission 20 increases the gear ratio according to a command from the control device 120 to increase the rotation speed of the compressor 50. In such an operating state, the power transmission loss of the transmission 20 increases, frictional heat is generated, and the temperature of the hydraulic oil 23 in the oil sump 22 tends to rise.

However, the hydraulic oil 23 in the oil sump (reservoir tank) 22 is sucked up by the hydraulic pump 112 from the suction pipe 82 by the operation of the hydraulic pump 112 and sent to the hydraulic motor 114 through the flow control valve 113. After being cooled by the oil cooler 116, it is returned to the oil sump 22 through the return pipe 81.

Therefore, cold working oil is returned to the oil sump 22, so that the oil temperature is prevented from rising. As a result,
The temperature of the hydraulic oil 23 can be kept low, the lubricating function can be prevented from lowering, the traction coefficient can be prevented from lowering, the slip ratio of the sliding portion can be lowered, and the oil film thickness is increased to cause wear. It is possible to prevent the power transmission failure due to abnormal wear of the power transmission portion.

Moreover, such a cooling structure of the hydraulic oil 23 shares the driving hydraulic circuit 111 of the hydraulic motor 114 for driving the blower fan 115 as an auxiliary machine, and the oil cooler 116 is installed in this hydraulic circuit 111. Since it can be configured by this, a special hydraulic pump or piping dedicated to cooling is unnecessary, and the cooling structure for hydraulic oil is simplified.

On the contrary, in the hydraulic circuit 111 of the auxiliary machine, since the oil sump 22 of the compressor with transmission 1 is also used as the reservoir tank of the hydraulic circuit, a special reservoir tank becomes unnecessary.

As a result, the number of parts can be reduced and the mountability on the vehicle can be improved.

The present invention is not limited to the structure of the above embodiment.

That is, although the planetary cone type transmission is described as the transmission 20 in the above-described embodiment, a transmission having another structure can be used as long as it is a transmission that controls the gear ratio by the refrigerating capacity.

In the above embodiment, the vane type compressor is used as the compressor 50. However, the compressor may be a plunger press type.

Further, in the above embodiment, the hydraulic motor 114 for driving the blower fan 115 is explained as an auxiliary machine, but the present invention is not limited to this, and other hydraulically operated auxiliary machines can be implemented. is there.

Needless to say, if the hydraulic circuit of the auxiliary machine originally has an oil cooler, this oil cooler can be used as it is.

Further, the oil cooler 116 may be installed between the oil sump 22 of the compressor with a transmission 1 and the hydraulic pump 112.

[0068]

As described above, according to the present invention, since the oil sump portion of the transmission is used as the reservoir tank of the hydraulic circuit, the hydraulic oil in the oil sump portion is changed to the hydraulic pressure as the hydraulically operated auxiliary machine is operated. It is circulated through the circuit, and in this circulation process, it is cooled by the oil cooler and the temperature is lowered. Therefore, the temperature rise of the hydraulic oil, that is, the lubricating oil is prevented, and the traction coefficient of the lubricating oil can be maintained high. In this case, the lubricating oil is cooled by the hydraulic circuit of the hydraulically operated auxiliary machine, and the hydraulic circuit of the hydraulically operated auxiliary machine also shares the oil reservoir of the transmission as a reservoir tank, which simplifies the structure. The number of parts can be reduced and the mountability on the vehicle is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a hydraulic circuit when a compressor with a transmission is installed in a hydraulic circuit for driving a hydraulic motor according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a structure of a compressor with a transmission of the same embodiment.

FIG. 3 is a sectional view taken along line AA in FIG. 2 of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Compressor with transmission, 10 ... Input shaft, 11 ... Driven pulley, 20 ... Transmission, 21 ... Casing, 22 ... Oil sump, 23 ... Hydraulic oil, 24 ... Input disk, 25 ... Output disk , 26 ... planetary cone, 30 ... speed change ring, 31 ...
Drive mechanism, 50 ... Compressor, 51 ... Main housing, 55 ...
Suction chamber, 60 ... rotor, 67 ... vane, 68 ... compression chamber,
76 ... Suction hole, 81 ... Return pipe, 82 ... Suction pipe, 100 ... Engine, 111 ... Hydraulic circuit, 112 ... Hydraulic pump, 113 ... Flow control valve, 114 ... Hydraulic motor,
115 ... Blower fan, 116 ... Oil cooler.

Claims (1)

[Claims] 1. An oil sump for storing a working oil in the transmission, wherein a transmission whose speed ratio is controlled by a refrigerating capacity is connected to an input shaft, and a compressor is connected to an output side of the transmission. Is provided, and the transmission is lubricated by the hydraulic oil stored in the oil sump, and the oil sump is connected in the middle of the hydraulic circuit connecting the other hydraulically operated auxiliary machine and the hydraulic pump. Is a reservoir tank of the hydraulic circuit, the operating oil in the oil reservoir is circulated through the hydraulic circuit, and an oil cooler is provided in the hydraulic circuit to cool the operating oil. Compressor with gearbox for automotive air conditioners.