JPH09189288A - Vibration damping device and swash plate compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce or remove tensile stress which exits in an elastic member so as to provide sufficient vibration damping effect which is also excellent in strength and durability. SOLUTION: An inside sleeve 82 is inserted to the inside of an outer cylinder main body 81, and an elastic member 83 such rubber is vulcanized and stuck between the outer cylinder main body 81 and the inside sleeve 82. Next, an inner cylinder main body 84 whose outside diameter is larger than the inside diameter of the inside sleeve 82 is pressed into the inside of the inside sleeve 82 so as to enlarge the diameter of the inside sleeve 82. The elastic member 83 is compressed in the radial direction between the inside sleeve 82 and the outside cylinder main body 8 by the enlargement of the diameter of the inside sleeve 82. The thus provided vibration damping device can be used for a swash plate compressor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an elastic material interposed between an outer cylinder and an inner cylinder arranged inside the outer cylinder to damp vibration transmission between the outer cylinder and the inner cylinder. Vibration damping device,
The present invention relates to a method for manufacturing the vibration damping device and a swash plate compressor using the vibration damping device.

[0002]

2. Description of the Related Art For example, Japanese Patent Laid-Open No. 1-190975 discloses an example of a swash plate compressor. The swash plate compressor has a cylindrical casing, a cylinder block having a plurality of cylinders arranged on one end side of the cylindrical casing, a crank chamber arranged on the other end side of the cylindrical casing, and a crank chamber extending inside the crank chamber. The existing rotating main shaft, the rotating swash plate fixed to the rotating main shaft and having the inclined surface on the cylinder block side, the swing plate opposed to the inclined surface of the rotating swash plate for preventing rotation, and the swing It has a piston connected to the peripheral portion of the plate and fitted in the cylinder, and a support member that supports the central portion of the swing plate on the cylinder block side. Further, in the swash plate type compressor, a vibration damping device is arranged between the support member and the cylinder block so as to damp the mechanical vibration generated by the operation of the compressor inside the compressor. .

In the vibration damping device used here, the inner cylinder is arranged inside the outer cylinder through an elastic material such as rubber so as to damp the transmission of vibration between the outer cylinder and the inner cylinder. Is something
The outer cylinder is engaged with the cylinder block and the inner cylinder is engaged with the support member in the rotational direction.

According to the swash plate type compressor provided with this vibration damping device, the mechanical vibration accompanying the operation of the compressor is damped inside the compressor, and the effect of reducing the transmission of the vibration to the outside of the compressor can be expected.

[0005]

SUMMARY OF THE INVENTION In the above-described conventional vibration damping device, in order to obtain the damping action of the vibration in the circumferential direction,
It is necessary to bond the elastic material disposed between the outer cylinder and the inner cylinder to the outer cylinder and the inner cylinder so as not to cause a circumferential displacement. To meet this requirement, an elastic material may be vulcanized and bonded between the outer cylinder and the inner cylinder.

However, tensile stress remains in the vulcanized and bonded elastic material when the temperature is lowered after vulcanization due to the difference in thermal expansion coefficient between the outer cylinder and the inner cylinder. This tensile stress lowers the strength and durability of the elastic material, and is one of the reasons why the desired vibration damping effect of the vibration damping device cannot be obtained.

Therefore, an object of the present invention is to reduce or eliminate the tensile stress inherent in an elastic material, have a high strength and durability, and obtain a sufficient vibration damping effect, and a method for manufacturing the same. To provide.

Another object of the present invention is to provide a rotary swash plate type compressor using this vibration damping device.

[0009]

According to the present invention, the inner cylinder is arranged inside the outer cylinder via the elastic material so as to damp the transmission of vibration between the outer cylinder and the inner cylinder. In the vibration damping device described above, the elastic material is bonded to the outer cylinder and the inner cylinder and is compressed in the radial direction, and has a tensile stress in the circumferential direction when not compressed. The device is obtained.

Here, the elastic material is vulcanized and adhered to the inner peripheral surface of the outer cylinder, and the inner cylinder is an inner cylinder body.
An inner sleeve in which the elastic member is closely fitted to the outer peripheral surface of the inner cylinder body and pressed toward the inner peripheral surface of the outer cylinder,
The inner sleeve may be adhered to the elastic material.

The elastic material is vulcanized and adhered to the outer peripheral surface of the inner cylinder, and the outer cylinder is closely fitted to the outer cylinder body and the inner peripheral surface of the outer cylinder body, and the elastic material is And an outer sleeve that is pressed toward the outer peripheral surface of the inner cylinder, and the outer sleeve is preferably adhered to the elastic material.

The elastic material is preferably compressed in the radial direction to the extent that the tensile stress is removed.

Further, according to the present invention, an elastic material is vulcanized and bonded between the outer cylinder and the inner sleeve inserted inside the outer cylinder, and the inner sleeve is provided inside the inner sleeve more than the inner diameter of the inner sleeve. A method for manufacturing a vibration damping device, comprising press-fitting an inner cylinder body having a large outer diameter to expand the inner sleeve, and radially compressing the elastic material by the outer cylinder and the inner sleeve. A method is obtained.

According to the present invention, an elastic material is vulcanized and bonded between the outer sleeve and an inner cylinder inserted inside the outer sleeve, and the outer sleeve has an inner diameter larger than an outer diameter of the outer sleeve. A method for manufacturing a vibration damping device, comprising press-fitting into an outer cylinder main body to reduce the diameter of the outer sleeve, and radially compressing the elastic material by the inner cylinder and the outer sleeve. can get.

According to the invention, a cylindrical casing, a cylinder block having a plurality of cylinders arranged at one end of the cylindrical casing, a crank chamber arranged at the other end of the cylindrical casing, A rotary main shaft extending into the crank chamber, a rotary swash plate fixed to the rotary main shaft and having an inclined surface on the cylinder block side, a swing plate opposed to the inclined surface for preventing rotation, In a swash plate compressor having a piston connected to a peripheral portion of a moving plate and fitted in the cylinder, and a supporting member supporting the central portion of the rocking plate on the cylinder block side, the supporting member The vibration damping device according to any one of claims 1 to 4 is disposed between the cylinder block and the cylinder block, the inner cylinder is engaged with the support member in a rotational direction, and the outer cylinder is connected to the cylinder block. Swash plate type compressor is obtained, characterized in that the click is engaged in the rotational direction.

Here, a washer fixedly held by the support member and a pin provided on the cylinder block are provided,
It is preferable to prevent the support member from rotating with respect to the cylinder block by engaging the pin and the washer.

It is also preferable to dispose a cushioning material between the pin and the washer.

Further, the washer faces the axial end surface of the vibration damping device, and it is also preferable to provide a rubber coating layer on the side of the vibration damping device of the washer.

Further, the support member has a flange portion facing the axial end surface of the vibration damping device, and a metal collar having a rubber coating layer on the surface is provided between the flange portion and the vibration damping device. It is also preferable to dispose.

[0020]

FIG. 1 shows a swash plate type compressor according to a first embodiment of the present invention. This swash plate compressor includes a cylinder block 3 having a cylindrical casing 1 and a plurality of cylinders 33 arranged at one end of the cylindrical casing 1.
And a crank chamber 2 arranged on the other end side of the cylindrical casing 1.
A rotary main shaft 4 extending into the crank chamber 2, a rotary swash plate 5 fixed to the rotary main shaft 4 and having an inclined surface on the cylinder block 3 side, and facing the inclined surface of the rotary swash plate 5. The rocking plate 6 which is prevented from rocking according to the rotation of the rotary swash plate 5, the piston 31 which is connected to the peripheral portion of the rocking plate 6 and is inserted into the cylinder 33, and the rocking plate And a support member 7 that supports the central portion of 6 on the cylinder block 3 side.

The support member 7 is a bevel gear 71 that meshes with a bevel gear 61 formed on the cylinder block 3 side of the oscillating plate 6.
And a shaft 72 integrally formed with the bevel gear 71. A serration 74 extending in the axial direction is formed on the outer peripheral surface of the shaft portion 72. A spherical recess 75 is formed in the central portion of the bevel gear 71 on the swing plate 6 side. The spherical recess 75 is for receiving the spherical body 10 interposed between the bevel gears 61 and 71.

On the other hand, a fitting hole 32 is formed in the center of the cylinder block 3. A serration 34 extending in the longitudinal direction is formed on the inner periphery of the fitting hole 32.

The shaft portion 72 of the support member 7 is inserted into the fitting hole 32 via the vibration damping device 8 which will be described in detail below, and basically the rotation thereof is blocked. This swash plate compressor is used in an air conditioner such as an automobile, and when the rotating main shaft 4 is rotated by an engine or the like, the oscillating plate 6 oscillates with the sphere 10 as a fulcrum to reciprocate the piston 31 in the cylinder 33. As a result, the compression action of the refrigerant gas or the like is obtained.

As shown in FIGS. 2 and 3, the vibration damping device 8 serves as a vibration damping member between a metallic outer cylinder body 81 and an inner sleeve 82 inserted inside the outer cylinder body 81 with a gap. Elastic materials such as working rubber (rubber bush)
83 is vulcanized and adhered, and a metal inner cylinder main body 84 having an outer diameter slightly larger than the inner diameter of the inner sleeve 82 is press-fitted inside the inner sleeve 82 for close fitting to enlarge the inner sleeve 82 diameter. That is, the diameter of the outer cylinder body 81 is increased.
The elastic member 83 is radially compressed by the inner sleeve 82 and the inner sleeve 82. Here, the diameter expansion of the inner sleeve 82 may be performed depending on the ductility of the material, or may be performed depending on a deformed portion such as a notch or a slit formed on the inner sleeve 82 itself. Good. The inner sleeve 82
And the inner cylinder main body 84 constitute an inner cylinder, and the outer cylinder main body 81 independently constitutes an outer cylinder.

According to this vibration damping device 8, the elastic material 83
Has a tensile stress in the circumferential direction when it is not compressed because it is vulcanized and bonded between the outer cylinder body 81 and the inner sleeve 82, but as a result of being compressed by the diameter expansion of the inner sleeve 82, The tensile stress of the elastic material 83 is reduced. Preferably, the elastic material 83 is radially compressed to such an extent that the tensile stress is removed.

As the vibration damping device 8, a device denoted by reference numeral 8'in FIGS. 4 and 5 can also be used. In the vibration damping device 8 ′, the elastic material 83 is vulcanized and bonded between the outer sleeve 86 and the inner cylinder main body 84 that is inserted inside the outer sleeve 86 with a gap, and the outer sleeve 86 is made larger than the outer diameter of the outer sleeve 86. Also, the outer sleeve 86 is pressed into the outer cylinder main body 81 having a small inner diameter and closely fitted to reduce the diameter of the outer sleeve 86, and the elastic material 83 is compressed in the radial direction by the inner cylinder main body 84 and the outer sleeve 86. Here, the diameter reduction of the outer sleeve 86 may be performed depending on the property of the material,
Further, it may be performed depending on a deformed portion such as a notch or a slit provided on the outer sleeve 86 itself. The outer sleeve 86 and the outer cylinder body 81 constitute an outer cylinder, and the inner cylinder body 8
4 independently constitutes the inner cylinder.

Also with this vibration damping device 8 ', since the elastic material 83 is vulcanized and bonded between the inner cylinder body 84 and the outer sleeve 86, it has a tensile stress in the circumferential direction when it is not compressed. However, as a result of being compressed by the diameter reduction of the outer sleeve 86, the tensile stress of this elastic material 83 is reduced. It goes without saying that the elastic material 83 is preferably compressed in the radial direction so that the tensile stress is removed.

Further, serrations 87 are formed on the outer peripheral surface of the outer cylinder body 81. The serration 87 meshes with the serration 34 of the fitting hole 32. Further, serrations 88 that mesh with the serrations 74 of the shaft portion 72 of the support member 7 are formed on the inner peripheral surface of the inner cylinder body 84. The number of serrations 34, 74, 87, 88 may be determined in relation to the number of mating mating members in consideration of strength and the like.

As a result, the support member 7 is movable in the radial direction and the rotation direction with respect to the cylinder block 3 within an allowable range depending on the elasticity of the elastic material 83. Therefore, the mechanical vibration of the support member 7 accompanying the operation of the compressor is attenuated and transmitted to the cylinder block 3 through the elastic material 83, so that the transmission of the vibration to the outside of the compressor is reduced. Therefore, when the swash plate compressor is mounted on a vehicle, noise in the vehicle interior is reduced. Returning to FIG. 1, the swash plate compressor further includes a washer 9 fixedly held by the flange portion 73 of the support member 7 and a pin 11 fixed to the cylinder block 3.
And a ring-shaped metal collar 12 disposed inside the washer 9 and between the flange portion 73 and the vibration damping device 8. As shown in detail in FIG. 6, the washer 9 has a recess 91 into which the pin 11 is inserted with a clearance, and a cushioning material 92 such as rubber is provided in the clearance between the inner surface of the recess 91 and the peripheral surface of the pin 11. It is set up. As a result, the support member 7 is prevented from rotating excessively with respect to the cylinder block 3 by the engagement between the pin 11 and the washer 9 via the cushioning member 92. Therefore, breakage of the elastic material 83 due to excessive deformation is prevented.

As shown in FIG. 7, a rubber coating layer 121 is provided on the surface of the metal collar 12, particularly both axial end surfaces. It is also preferable to provide a rubber coating layer on the washer 9 side of the vibration damping device 8.

FIG. 8 shows a swash plate type compressor according to a second embodiment of the present invention. The same parts as those of the swash plate compressor shown in FIG.

In this swash plate compressor, the washer 9
Has an inner diameter substantially equal to the outer diameter of the shaft portion 71 of the support member 7. Further, as shown in FIG. 9, a rubber coating layer 93 is provided on the washer 9 on the side of the vibration damping device 8.
According to this, the above-mentioned washer becomes unnecessary.

[0033]

As described above, according to the present invention,
Since the tensile stress inherent in the elastic material is reduced or removed, it is possible to provide a vibration damping device that is rich in strength and durability and can obtain a sufficient vibration damping effect. Therefore, using this vibration damping device As a result, it is possible to provide a swash plate compressor in which mechanical vibrations due to operation are internally damped and the transmission of vibrations to the outside is reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of only a main part of a swash plate compressor according to a first embodiment of the present invention.

FIG. 2 is a front view of a vibration damping device used in the swash plate compressor of FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is a front view of another example of a vibration damping device that can be used in the swash plate compressor of FIG.

FIG. 5 is a sectional view taken along the line VV of FIG. 4;

FIG. 6 is an enlarged view of a main part of the swash plate compressor in FIG.

7 is a sectional view of parts used in the swash plate compressor of FIG.

FIG. 8 is a vertical sectional view of only a main part of a swash plate compressor according to a second embodiment of the present invention.

9 is a sectional view showing only a main part of the swash plate compressor shown in FIG.

[Explanation of symbols]

 1 Cylindrical casing 2 Crank chamber 3 Cylinder block 31 Piston 32 Fitting hole 33 Cylinder 34 Serration 4 Rotating main shaft 5 Rotating swash plate 6 Swing plate 61 Bevel gear 7 Supporting member 71 Bevel gear 72 Shaft portion 73 Flange portion 74 Serration 75 Spherical Recesses 8,8 'Vibration damping device 81 Outer cylinder body 82 Inner sleeve 83 Elastic material 84 Inner cylinder body 86 Outer sleeve 87,88 Serration 9 Washer 91 Recess 92 Buffer material 93 Rubber coating layer 10 Sphere 11 Pin 12 Metal collar 121 Rubber Coating layer

Claims (11)

[Claims] 1. A vibration damping device in which an inner cylinder is arranged inside an outer cylinder via an elastic material so as to damp transmission of vibration between the outer cylinder and the inner cylinder, wherein the elastic material is A vibration damping device that is bonded to the outer cylinder and the inner cylinder and is compressed in the radial direction, and has a tensile stress in the circumferential direction when not compressed. 2. The elastic material is vulcanized and adhered to the inner peripheral surface of the outer cylinder, and the inner cylinder is closely fitted to the inner cylinder main body and the outer peripheral surface of the inner cylinder main body. The vibration damping device according to claim 1, further comprising an inner sleeve in which an elastic material is pressed toward an inner peripheral surface of the outer cylinder, the inner sleeve being bonded to the elastic material. 3. The elastic material is vulcanized and adhered to the outer peripheral surface of the inner cylinder, and the outer cylinder is closely fitted to the outer cylinder main body and the inner peripheral surface of the outer cylinder main body. The vibration damping device according to claim 1, further comprising an outer sleeve that presses a material toward an outer peripheral surface of the inner cylinder, the outer sleeve being bonded to the elastic material. 4. The vibration damping device according to claim 1, wherein the elastic material is compressed in the radial direction to the extent that the tensile stress is removed. 5. An elastic material is vulcanized and bonded between an outer cylinder and an inner sleeve inserted inside the outer cylinder, and an inner member having an outer diameter larger than the inner diameter of the inner sleeve is formed inside the inner sleeve. A method of manufacturing a vibration damping device, comprising: press-fitting a cylinder body to expand the inner sleeve, and radially compressing the elastic material by the outer cylinder and the inner sleeve. 6. An outer cylinder main body having an inner diameter smaller than the outer diameter of the outer sleeve, wherein an elastic material is vulcanized and bonded between the outer sleeve and an inner cylinder inserted inside the outer sleeve. A method for manufacturing a vibration damping device, comprising: press-fitting the outer sleeve to reduce the diameter of the outer sleeve, and compressing the elastic material in the radial direction by the inner cylinder and the outer sleeve. 7. A cylindrical casing, a cylinder block having a plurality of cylinders arranged on one end side of the cylindrical casing, a crank chamber arranged on the other end side of the cylindrical casing, and extending into the crank chamber. Rotating spindle to
A rotary swash plate fixed to the rotary main shaft and having an inclined surface on the cylinder block side, a swing plate opposed to the inclined surface for preventing rotation, and connected to a peripheral portion of the swing plate and A swash plate compressor having a piston fitted in a cylinder and a support member for supporting a central portion of the oscillating plate on the cylinder block side, wherein the support member and the cylinder block are disposed between the support member and the cylinder block. The vibration damping device according to any one of claims 1 to 4 is provided, the inner cylinder is engaged with the support member in a rotational direction, and the outer cylinder is engaged with the cylinder block in a rotational direction. And a swash plate compressor. 8. A washer fixedly held on said support member, and a pin provided on said cylinder block, wherein said support member is prevented from rotating with respect to said cylinder block by engagement of said pin and said washer. The swash plate compressor described. 9. The swash plate compressor according to claim 8, wherein a cushioning material is provided between the pin and the washer. 10. The washer faces the axial end surface of the vibration damping device, and a rubber coating layer is provided on the washer side of the vibration damping device.
The swash plate compressor described. 11. The metal collar having a flange portion facing the axial end surface of the vibration damping device, and a rubber coating layer provided on the surface between the flange portion and the vibration damping device. The swash plate compressor according to claim 7, further comprising: