JPH0486384A - Compressor with speed change gear - Google Patents

Abstract

PURPOSE:To smoothly supply an oil to a thrust bearing receiving a large load and certainly enhance durability by forming an oil passage in a plate provided to make it difficult to feed the oil into the body part of a cam disc. CONSTITUTION:When an input shaft 12 is rotated by an engine, the rotation is successively transmitted to an input disc 14, a planetary cone 16, and an output disc 15, and further transmitted to a compressor shaft 11 through a cam disc 20 and a plate 23 to drive a compressor body. In this case, a thrust bearing 22 is covered with the body part 201 of the cam disc 20, and the body part 201 is laid in the state sealed by the plate 24. Thus, a constitution difficult to supply a lubricating oil to the part of the thrust bearing 22 is provided. A guide hole 25 communicated with the body part 201 is formed to the plate 23 to guide the lubricating oil to the cavity part in the body part 201 of the cam disc 20 through the guide hole 25. Thus, the oil is certainly circulated together with the operation of the compressor to the thrust bearing 22 part receiving a large load, whereby durability is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an auxiliary machine used in an air conditioner for an automobile, and particularly to a compressor with a transmission equipped with a continuously variable transmission mechanism on the input side.

[Prior Art] A refrigerant compressor that constitutes an air conditioner installed in an automobile is
It is directly driven by the engine installed in the vehicle, and compresses the refrigerant as the engine rotates.

In this way, the engine that drives the refrigerant compressor changes its rotational speed according to the driving conditions, and therefore the rotational speed of the power source that is transmitted to the compressor changes according to the driving conditions of the car. do. In other words, the speed of rotation supplied to the input shaft of the compressor changes in accordance with the engine rotation speed, but in a refrigerant compressor, the capacity is adjusted to a constant level according to the load applied to the air conditioner. The rotational speed is required to be maintained within the range.

In order to deal with this situation, for example, Japanese Unexamined Patent Publication No. 62-1
As shown in Publication No. 70787, a compressor with a transmission that maintains the rotation speed applied to the compressor main body within a certain range even if the rotation speed applied to the input shaft changes. is proposed. In this compressor, an input disk is provided on the input shaft driven by the engine, an output disk is provided on the compressor shaft that provides rotational force to the compressor body, and a planetary cone is interposed between the input and output disks. , the rotation of the input shaft is transmitted to the output shaft via the planetary cone. In this case, a large pressing force is set between the human power shaft and the output shaft via the planetary cone, and the rotational speed transmitted from the input shaft to the planetary cone is variable by the speed change ring. In this way, a frictionless stepless transmission mechanism is constructed.

In other words, in such a frictionless stepless rotational force transmission device, it is necessary to generate a large pressing force necessary for transmitting rotational torque, and this pressing force is required between the input and output shafts. The load acting on the thrust bearing that receives the load also inevitably increases. The supply of lubricating oil to this thrust bearing portion is an important factor in ensuring the durability of this bearing.

A passage for lubricating oil is formed to reach the thrust bearing.

[Problems to be Solved by the Invention] This invention has been made in view of the above points, and it is possible to smoothly supply lubricating oil to the thrust bearing portion where a particularly large load is applied, and to improve durability and It is an object of the present invention to provide a compressor with a variable transmission whose reliability is effectively improved.

[Means for Solving the Problems] A compressor with a transmission according to the present invention has a cylindrical body extending around a compressor shaft, and is rotatably attached to an input shaft via a radial bearing, A thrust bearing is provided inside the body of the cam disk, which includes a cam disk to which rotation is transmitted from the output disk, a plate connected to the compressor shaft is connected to the cam disk, and which receives pressure contact force between the input and output disks. In a transmission (=1) compressor configured in this way, the plate makes it difficult for oil to be supplied to the inside of the body of the cam disc. However, by forming an oil passage in the plate, oil can be smoothly supplied to the thrust bearing, which can handle a large load.Also, by making improvements to this thrust bearing, , oil is now smoothly supplied to the radial bearing that supports the cam disc, and the durability of this transmission (' = I) compressor can be reliably increased.
The reliability of air conditioners installed in automobiles is effectively improved.

[Embodiments of the invention] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Attachment 1: Figure 1 shows the cross-sectional structure of a variable speed compressor installed in an automobile, especially the transmission mechanism section. The compression mechanism is driven to compress and discharge the refrigerant. In addition, the input shaft 12 is positioned coaxially with the compressor shaft 11 and is rotatable with respect to the compressor shaft 11.
A pulley 13 is attached to the input shaft 12, and rotation from an engine (not shown) is transmitted to the pulley 13 via a belt (not shown). That is,
When the engine is rotated, the input shaft 12 is rotated at a rotation speed corresponding to the rotation speed of the engine.

An input disk 14 is provided on the human power shaft 12 so as to be rotated integrally therewith, and an output disk 15 is provided so as to be positioned opposite to the input disk 14. This output disk 15 is set at a position coaxial with the compressor shaft 11, and this output disk 15 and input disk 1
The M-leg cones 1G are provided at positions where the outer peripheral edge portions of the four cones are in contact with each other. This planetary cone 16 is 2 in the figure.
Although shown individually, a plurality of pieces are set along the circumference around the shaft 11, and each is rotatably attached to a ring-shaped retainer 17, and this retainer 17
is set rotatably around an axis.

To explain the planetary cone 16, this planetary cone 1
6 has an umbrella-shaped part 161 formed with a conical contact surface, and on the bottom surface of this umbrella-shaped part 161, a cylindrical disk part with a smaller diameter than the outer diameter of the umbrella-shaped part 61], 62 are formed. Be prepared.

A shaft protruding from the center of the disk portion 162 is rotatably supported by the retainer 17.

Here, the outer peripheral side surface of the disk portion 162 is formed into a concave surface that is frictionally engaged with the outer edge of the input disk 14, and as the human-powered disk 14 rotates, the disk portion 162 of the planetary cone 16 The rotational force is transmitted to the In addition, the disk portion [
The position corresponding to the outer circumference of No. 2 is a contact surface that contacts the outer edge of the output disk 15, and when the planetary cone 16 rotates,
The rotational force is transmitted to the output disk 15.

The planetary cone 16 has one diametrically extending tangent of its umbrella portion 161 connected to the compressor shaft 11 and the input '1illll.
The axis of the disk part 162 is tilted and supported by the retainer 17 so that it is parallel to the axis of the umbrella 12, and the surface parallel to the axis of the umbrella part 161 contacts the speed change ring 18. I'm trying to make it happen. This gear ring 18
is controlled to move parallel to the axis in response to changes in the gear ratio, and is variably moved at the contact position with the umbrella-shaped portion 161 of the planetary cone 16 or on the diameter line of this umbrella-shaped portion 161. It becomes like this.

The input disk 14 is rotated, and the planetary controller 1
When the gear ring 18 is rotated 6 times, the umbrella-shaped portion 161
The retainer 17 is rotated as it is transferred, and the planetary cone 16 is rotated along its circumference while rotating itself. In this case, at the contact position of the speed change ring 18 or at a position close to the center of the umbrella-shaped portion 161, the retainer J7
The rotational speed of the retainer I7 is slow, and as the contact position of the speed change ring 18 approaches the outer periphery of the umbrella-shaped portion 161, the rotational speed of the retainer I7 increases.

Therefore, even if the rotational speed of the input disk 14 is constant, the rotational speed transmitted from the planetary cone 16 to the output disk 15 changes depending on the position of the speed change ring 18, thereby forming a continuously variable transmission mechanism. Become so.

A cam disk 20 is coupled to the output disk 15 through a coupling mechanism using balls 19, so that the cam disk 20 is rotated together with the output disk 15. The cam disk 20 includes 20 body portions extending in the direction of the human power shaft 12, and is rotatably attached via a radial bearing 21 to the outer periphery of a cylindrical portion of the input disk 14 that is a connecting portion with the input shaft 12. A thrust bearing 2 is provided between the bearing portion of the cam disc 20 and the stopper of the input shaft 12.
2, a spring 23 is interposed between the output disk 5 and the cam disk 20, and a pressing force is set between the output disk 15 and the input disk. That is, the spring 23 applies a pressing force to the cam disc 20 in the direction of the thrust bearing 22, and the output disc 15
The initial contact friction force between and the planetary contact 16 is maintained.

A plate 24 that rotates integrally with the compressor shaft 11 is coupled to the cam disc 20 so that the rotation of the cam disc 20 is transmitted to the compressor shaft 11.

That is, when the input shaft 12 is rotated by the engine, the rotation is transmitted to the input disk 14, planetary cone 16, output disk 15, and then to the compressor shaft 11 via the cam disk 20 and plate 23, and the rotation is transmitted to the compressor shaft 11 through the cam disk 20 and plate 23. is now driven.

In this case, the speed ratio is set in accordance with the position of the speed change ring 18, so that even if the engine speed changes significantly, the speed of the compressor shaft 11 is maintained within a specified range.

In such a compressor, a large pressing force of, for example, 500 kg acts on the thrust bearing 22. However, this thrust bearing 22 has a guide hole 25
The lubricating oil is guided through the guide hole 25 into the hollow portion in the body 201 of the cam disk 2o according to its weight and the flow of the refrigerant.

Here, the outer diameter of the thrust race 221 on the plate side of the thrust bearing 22 is configured to be smaller than the inner diameter of the body portion 201, so that oil can be easily supplied to the ball portion of the bearing 22. Furthermore, it is difficult for oil to be supplied to the radial bearing 21 that supports the cam disk 20, but by increasing the inner diameter of the thrust race 222 on the opposite side of the thrust bearing 22 to form a gap, the radial An oil passage to the bearing 21 portion is ensured.

The state will be as follows. Therefore, it is difficult to supply lubricating oil to the portion of the thrust bearing 22 that receives a large load.

Therefore, the body 201 is communicated with the plate 23. [Effects of the Invention] As described above, according to the compressor according to the present invention, oil flows to the thrust bearing portion that receives a large load as the compressor operates. This ensures reliable circulation and ensures durability. Therefore, the reliability of the air compressor for automobiles in which this compressor is used is also improved.

[Brief explanation of the drawing]

The accompanying drawing is a cross-sectional configuration diagram showing, in particular, a transmission mechanism portion of a compressor with a transmission according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Compressor shaft, 12... Input shaft, 14... Input disk, 15... Output disk, 16... Planetary cone, 161... Umbrella-shaped part, 162... Disk part, 17... Retainer, 18... Speed change ring, 20...
...Cam disc, 21...Radial bearing, 22...
・Thrust bearing, 24...Plate, 25...Guide hole.

Claims (1)

[Claims] A compressor shaft that drives the compressor main body, and a rotational force applied from the outside that is located coaxially with the compressor shaft and is set to rotate independently of the compressor shaft. An input shaft that is rotated, an input disk that is rotated integrally with the input shaft, an output disk that is set to face the input disk, and a rotation of the input disk that comes into contact with the peripheral surface of the input disk. a plurality of planetary cones that are rotated as a result of the rotation and transmit the rotation to the output disk; a speed change ring that variably sets a transmission coefficient of the rotational speed transmitted from the input disk to the output disk via the planetary cones; a cam disk that is rotatably supported by the input shaft via a radial bearing and has a cylindrical body that extends in the direction of the outer periphery of the compressor shaft, and is configured to rotate together with the output disk; a plate rotated by the cam disk and integrally connected to the compressor shaft; a plate located inside the body of the cam disk and interposed between the input disk and the output disk; a thrust bearing that receives pressure contact force acting between the output disks; the plate has an oil passage that guides lubricating oil to the thrust bearing section; and the thrust bearing also has an oil passage that leads to the radial bearing. A compressor with a transmission, characterized in that a gap is formed in which a passage is formed.