JPH01190974A - Rotary swash plate-type compressor - Google Patents

Abstract

PURPOSE:To decrease a noise in a compressor damped in its load fluctuation in a thrust direction by providing a vibration absorbing member to be arranged in a part in which either a front housing or a rotary swash plate comes into contact with a thrust bearing. CONSTITUTION:A crank chamber 2 is partitioned in a cylindrical casing 1 forming two or more cylinders 34. A rotary swash plate 5 is contained in the crank chamber 2, and a front housing 10 closes the cylindrical casing 1. The rotary swash plate 5 arranges in its front surface a swivel plate 6 connected to a piston inserted and fitted into the cylinder 34. A thrust bearing 17 is mounted interposing between the rotary swash plate 5 and the front housing 10, while a vibration absorbing member 8 is arranged in a part where the front housing 10 comes into contact with the thrust bearing 17. In this way, the rotary swash plate 5 absorbs vibration in its axial direction.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotary swash plate type press machine.

[Prior art] This type of rotating swash plate type pressure aI! For example, there is one shown in Fig. 3. In FIG. 3, a rotating swash plate 5 is attached to a rotating main shaft 4 extending into a crank chamber 2 formed by a casing 1 and a front housing 10. As shown in FIG. This rotating main shaft is supported by the front housing 10 at two locations in the axial direction by first and second radial bearings 11,12. Further, the rotating swash plate 5 faces the front housing 10 via a thrust bearing 17.

A starting plate 6 is opposed to the rotating swash plate 5 in the axial direction. The swing plate 6 is urged toward the rotating swash plate 5 by a coil spring 74 via the support member 7 and ball #-9. #
! The rotation of the J moving plate 6 is prevented by the meshing of the bevel gears 61 and 72. Note that the support member 7 is attached to the cylinder block 3 so as to be movable only in the axial direction.

The cylinder block 3 is formed integrally with the cylindrical casing 1 and has a plurality of cylinders 34. A piston 18 is slidably fitted into each cylinder 34 . These pistons 18 are connected to the periphery of the rocking plate 6 via piston rods 33.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional technology, vibrations due to fluctuations in the pressure applied to the piston during suction and compression of gas due to operation of the compressor are transmitted to the rocking plate 6 and the rotating swash plate 5. , and is transmitted to the front housing 10 via the thrust bearing 17 as vibration in the thrust direction. Since the front housing 10 is screwed to the casing 1 which has an attachment portion to the vehicle body, fluctuations in the force in the thrust direction transmitted to the front housing may reach into the vehicle interior via the casing 1.

On the other hand, engines, particularly piston-type engines, have a feature in that vibrations in the radial direction of the crankshaft are relatively large, but vibrations in the thrust direction are small. For this reason, the engine is mounted to the vehicle body so that the amount of vibration damping in the radial direction is large, and the amount of vibration damping in the thrust direction is relatively small.

Therefore, the vibration in the thrust direction generated in the pressure wJIR is synchronized with the thrust direction of the engine from the connection structure between the compressor gooey and the engine, and may cause an increase in the noise inside the vehicle.

Therefore, an object of the present invention is to provide a rotary swash plate compressor that attenuates compression load fluctuations in the thrust direction received from a piston and reduces indoor noise.

[Means for Solving the Problems J] According to the present invention, a cylindrical casing, a cylinder block having a plurality of cylinders formed at one end of the cylindrical casing, and a crank chamber between the cylinder block. a front housing that defines the cylindrical casing and closes the cylindrical casing; a rotating main shaft that extends through the front housing and extends into the crank chamber and is supported at a plurality of locations in the axial direction; a rotating swash plate attached to the rotating main shaft; a thrust bearing not interposed between the rotating swash plate and the front housing; and a thrust bearing disposed in the crank chamber and facing the rotating swash plate in the axial direction. A rotary swash plate compressor comprising a rocking plate disposed therein, and a piston connected to a peripheral portion of the rocking plate and slidably fitted into the cylinder, wherein the front housing and the rotary swash plate A rotating swash plate type compressor 1iii, characterized in that a vibration absorbing member is disposed on at least one of the parts in contact with the thrust bearing.
l is obtained.

[Function] The piston experiences pressure fluctuations when inhaling and compressing gas. Vibrations in the thrust direction caused by the pressure fluctuations are transmitted to the rotating swash plate via the rocking plate.

However, the vibration of the rotating swash plate is absorbed by the vibration absorbing member, attenuated, and transmitted to the front housing. Therefore, the vibration of the compressor in the thrust direction is sufficiently suppressed.

[Example] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the invention. In FIG. 1, one end of the cylindrical casing 1 is connected to a front housing 10.
, and defines a crank chamber 2 inside. A cylinder block 3 is integrally formed at the other end of the casing 1.

A cylinder head 13 is mounted on the cylinder block 3 via a valve seat 12. This cylinder head 13 has a suction chamber 14 and a discharge chamber 15 formed therein.

A rotating main shaft 4 is supported by the front housing 10 via a first radial bearing 11 . The rotating main shaft 4 extends from the center of the front housing 10 into the crank chamber 2, and passes through the rotating swash plate 5 and the swing plate 6 in the crank chamber 2. The tip of the 0-rotating main shaft 4 is connected to the cylinder block 3. The hemispherical portion 71 of the support member 7 supported by the support member 7 is fitted and supported via an additional radial bearing 22 . As a result, the rotating main shaft 4 is supported at two locations in the axial direction by the front housing 10 and the cylinder block 3, respectively.

A rotating swash plate 5 is disposed on the rotating main shaft 4. This rotating swash plate 5 is fixed to the rotating main shaft 4 by a pin 52,
A thrust bearing 17 made of a needle bearing is interposed between the zero-rotation swash plate 5 and the front housing 10, which rotate with the rotation of the rotating main shaft 4. In this way, the rotating swash plate 5 is thrust supported by the front housing 10.

A swing plate 6 is disposed on the inclined surface 53 side of the rotating swash plate 5 via a thrust needle bearing 54. This swing plate 6 has a bevel gear 61 formed on the cylinder block 3 side in the center. Further, a plurality of pivot receivers 62 are formed on the periphery of the swing plate 6. One end of the piston rod 33 is pivotally supported by the pivot receiver 62 . The other end of the piston rod 33 is pivotally supported by a piston 18 disposed within a cylinder 34.

A fitting hole 31 is formed in the cylinder block 3 that pivotally supports one end of the rotating main shaft 4. A cylindrical shaft 73 of the support member 7 is fitted into the fitting hole 31 so as to be movable only in the axial direction. The support member 7 has a spherical portion 71 having a bevel gear 72.
It is equipped with This bevel gear 72 is the bevel gear 61 of the rocking plate 6.
A coil spring 74 is disposed within the cylindrical shaft 73 that is engaged with the cylindrical shaft 73, and constantly presses the support member 7 against the swing plate 6 side. In this way, the meshing state between the bevel gear 61 and the bevel gear 72 is maintained.

Further, a portion of the front housing 10 facing the thrust bearing 17 is provided with a vibration absorbing member 8 formed in a ring shape from an elastic member such as rubber. Specifically, the vibration absorbing member 8 has a ring-shaped fitting groove 81 recessed in the rotary swash plate 5 side of the front housing 11.
fixedly installed inside. Therefore, the thrust bearing 17 is interposed between the rotating swash plate 5 and the vibration absorbing member 8.

The pressure applied to the piston 18 varies based on suction and compression of fluid gas as the compressor operates. Vibrations caused by this pressure fluctuation are caused by the vibrations between the rotating swash plate 2 and the front housing 1.
The vibration is damped by the vibration absorbing member 8 disposed between the vibration absorber 8 and the vibration absorber 8.

FIG. 2 shows a second embodiment of the present invention,
The basic configuration is the same as the first embodiment.

In this second embodiment, the rotating main shaft 4 is supported by the front housing 10 at two locations in the axial direction by a first radial bearing 11 and a second radial bearing 12.

A four spherical portion 76 is formed at the center of the bevel gear 72 of the support member 7 . A spherical recess 63 is also formed in the center of the bevel gear 61 of the rocking plate 6. A spherical recess 76 is provided between the spherical recesses 76. A spherical body 9 is interposed between the 63. The coil spring 74 disposed within the cylindrical shaft 73 has a spherical recess 63. 9, the bevel gear 72 is pressed against the bevel gear 61 of the rocking plate 6, whereby the bevel gear 61 and the bevel gear 7
The meshing state of 2 is maintained.

Furthermore, a vibration absorbing member 8 similar to that of the first embodiment is disposed between the front housing 10 and the rotary swash plate 5 at a position facing the thrust bearing 17.

Note that in the above description, the vibration absorbing member 8 is replaced by the front housing 10.
Although the vibration absorbing member 8 may be provided on the rotary swash plate 5, or may be provided on both the front housing 1° and the rotary swash plate 5 so as to sandwich the thrust bearing 17 therebetween.

[Effects] As explained above using the embodiments, according to the rotary swash plate compressor according to the present invention, the compression load fluctuation in the thrust direction that the piston receives is absorbed by the vibration absorbing member, attenuated, and transmitted to the front housing. It turns out. As a result, vibrations in the thrust direction transmitted to the engine are attenuated and reduced, thereby reducing noise in the vehicle interior caused by the compressor.

Margin below

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view showing a second embodiment, and FIG. 3 is a sectional view showing a conventional compressor. 1... Cylindrical casing, 2... Crank chamber, 3...
... Cylinder block, 4... Rotating main shaft, 5... Rotating swash plate, 6... Rocking plate, 7... Supporting member, 8...
Vibration damping member, 18... piston, 34... cylinder. 1986 8th/Da day

Claims (1)

[Claims] (1) A cylindrical casing, a cylinder block having a plurality of cylinders formed at one end of the cylindrical casing, and a front housing that defines a crank chamber between the cylinder block and closes the cylindrical casing. a rotating main shaft that penetrates the front housing and extends into the crank chamber and is supported at a plurality of locations in the axial direction; a rotating swash plate disposed in the crank chamber and attached to the rotating main shaft; a thrust bearing interposed between the rotating swash plate and the front housing; a rocking plate disposed in the crank chamber and facing the rotating swash plate in the axial direction; A rotating swash plate compressor comprising a piston connected to a peripheral portion and slidably inserted into the cylinder, wherein at least one of the front housing and the rotating swash plate is in contact with the thrust bearing. A rotary swash plate compressor characterized by having a vibration absorbing member installed in a portion thereof.