WO2009084395A1 - 揺動板式可変容量圧縮機 - Google Patents
揺動板式可変容量圧縮機 Download PDFInfo
- Publication number
- WO2009084395A1 WO2009084395A1 PCT/JP2008/072473 JP2008072473W WO2009084395A1 WO 2009084395 A1 WO2009084395 A1 WO 2009084395A1 JP 2008072473 W JP2008072473 W JP 2008072473W WO 2009084395 A1 WO2009084395 A1 WO 2009084395A1
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- WIPO (PCT)
- Prior art keywords
- rotation
- outer ring
- main shaft
- spherical surface
- swing
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1054—Actuating elements
- F04B27/1063—Actuating-element bearing means or driving-axis bearing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
- F04B1/146—Swash plates; Actuating elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/1054—Actuating elements
- F04B27/1072—Pivot mechanisms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18056—Rotary to or from reciprocating or oscillating
- Y10T74/18296—Cam and slide
- Y10T74/18336—Wabbler type
Definitions
- the present invention relates to an oscillating plate variable displacement compressor, and more particularly to an oscillating plate variable displacement compressor incorporating a novel oscillating plate rotation prevention mechanism.
- Patent Documents 1, 3, and 4 describe a structure in which a barfield type constant velocity joint is provided as a rocking plate rotation prevention mechanism.
- the rocking component and the swash plate are rocked.
- the inner ring of the constant velocity joint Is finally supported by the main shaft through the structure the number of intervening parts is large and the accumulated play becomes large, which is insufficient in terms of vibration, noise, and durability.
- the Barfield type constant velocity joint mechanism described in Patent Documents 1, 3, and 4 has a structure that theoretically transmits rotational power between the inner and outer rings with a plurality of balls. Therefore, it is difficult to obtain uniform and continuous contact of a plurality of balls, and the contact pressure of a specific ball increases.
- the rotational power transmission between the inner and outer rings is performed in the shear direction of the balls by the ball guide grooves formed on the inner and outer rings with the cage in between, the contact surface between the balls and the guide grooves in the power transmission direction. Will have a large inclination. For this reason, when a predetermined power is transmitted, a contact load generated as a vertical drag increases. Therefore, it is necessary to make the ball size (ball diameter) sufficiently large in order to ensure a sufficient transmission capability. For these reasons, further miniaturization is difficult and application to a small capacity compressor is difficult.
- the rotation prevention mechanism of the swing plate (a) the rotation is prevented in the housing but is provided so as to be movable in the axial direction.
- An inner ring having a plurality of guide grooves for guiding a plurality of balls provided for power transmission, and (b) a swing center member for swing motion of the swing plate.
- a sleeve provided on the rotation main shaft so as to be rotatable relative to the rotation main shaft and movable in the axial direction, and engaged with the inner ring so as to be movable in the axial direction together with the inner ring; and (c) in each guide groove of the inner ring.
- An outer ring that supports d) is held by the inner ring and the opposing guide grooves formed in the outer ring, mechanism having a plurality of balls for performing power transmission, the is provided by being compressed between the guide grooves.
- this sliding part is sufficiently lubricated to maintain excellent durability and quietness, but since this sliding part is located at the center of the rotating part, sufficient lubrication is stabilized. It is difficult to get. Furthermore, the contact between the spherical surface of the outer periphery of the sleeve and the spherical surface formed on the inner periphery of the outer ring as the swinging member is contact between the substantially spherical surfaces of the same shape, and the contact surface ends are in contact with each other. Partially excessive surface pressure may occur. As a result, there is a possibility that seizure or wear may occur in the sliding portion.
- the object of the present invention is to pay attention to the remaining problems in the new rocking plate rotation prevention mechanism using the unique constant velocity joint mechanism previously proposed by the present applicant, and the above-mentioned sliding of the rotation prevention mechanism. It is an object of the present invention to provide a swing plate type variable capacity compressor that suppresses seizure and wear of a portion and has excellent durability and quietness.
- a swing plate type variable displacement compressor is supported with a piston inserted in a cylinder bore so as to be reciprocable and a rotating main shaft so as to be variable in angle with respect to the main shaft.
- the oscillating plate variable capacity compressor provided with the rotation prevention mechanism of The rotation preventing mechanism is (a) provided in the housing so as to be prevented from rotating in the axial direction but movable in the axial direction, and supports the rotation main shaft so as to be capable of relative rotation and relative movement in the axial direction via a bearing at the inner diameter portion.
- an inner ring having a plurality of guide grooves for guiding a plurality of balls provided for power transmission, and (b) functioning as a swinging center member of the swinging motion of the swinging plate,
- a sleeve which is provided so as to be capable of relative rotation and axial movement with respect to the rotation main shaft, and is engaged with the inner ring so as to be movable in the axial direction together with the inner ring, and (c) a position facing each guide groove of the inner ring.
- An outer ring having a plurality of guide grooves for guiding the ball, supported swingably on the sleeve, and having the swing plate fixedly connected to an outer periphery thereof; and (d) formed on the inner ring and the outer ring.
- the guide groove Opposite each other That is held by the guide groove, together constituting a mechanism having a plurality of balls for performing power transmission by being compressed between the guide grooves,
- a relative shape difference is provided in the axial cross-sectional profile between the substantially convex spherical surface formed, and the clearance between both surfaces increases toward both axial ends of the contact portion between the substantially concave spherical surface and the substantially convex spherical surface.
- the shape difference is set so as to be large.
- the outer ring can be structured to support the swash plate rotatably via a bearing.
- a structure in which the swash plate is rotatably supported by the swing plate via a bearing may be employed.
- the outer ring of the rotation preventing mechanism is supported by the sleeve so as to be swingable, and the sleeve is supported so as to be rotatable with respect to the rotation main shaft and movable in the axial direction.
- the inner ring is supported in the housing so as to be movable in the axial direction and is prevented from rotating, and a rotation main shaft, for example, a rear end of the rotation main shaft is supported by a bearing installed in an inner diameter portion of the inner ring.
- the rotation main shaft is supported so that it can rotate on both sides of the compression main mechanism portion (that is, both-end support), and a sufficiently high rigidity can be easily secured, and the swinging of the main shaft can be kept small. It becomes possible to reduce the diameter of the main shaft, improve reliability, reduce vibration and noise. Further, since the swing of the rotating main shaft is suppressed to a small value, it is possible to suppress the swing of the swash plate rotated together with the main shaft, and the rotation balance of the entire rotating unit can be improved. In addition, by optimizing the shape of the guide grooves facing each other formed on the inner ring and the outer ring, the balls held between the guide grooves can be evenly and continuously contacted, improving reliability, vibration and noise. Can be reduced.
- the guide groove of the ball only needs to be able to roll with the movement of the intersection of the two guide grooves between a pair of spaced apart guide grooves, and the groove itself is not required to have a complicated shape. It becomes easy and it becomes advantageous also in cost.
- a plurality of balls acting for power transmission are supported in the compression direction between guide grooves facing each other with the balls interposed therebetween, and perform power transmission.
- the actual contact area can be secured sufficiently large, the contact surface pressure can be reduced, and this is advantageous in terms of reliability.
- the contact surface pressure is reduced, the ball diameter can be reduced, and the entire rotation prevention mechanism can be reduced in size.
- a substantially concave spherical surface formed on the inner periphery of the outer ring that functions as a swinging member for connecting the swinging plate in the rotation preventing mechanism so as to be swingable, and an outer periphery of the sleeve that functions as the swinging center member.
- a relative shape difference is provided in the axial cross-sectional profile between the substantially convex spherical surface and the clearance between both surfaces increases as it goes to both axial ends of the contact portion between the substantially concave spherical surface and the substantially convex spherical surface.
- the shape difference is set so that a clearance at both axial ends of the contact portion is 20 microns or more. If the clearance is less than 20 microns, the effect of preventing the occurrence of excessive surface pressure may not be obtained sufficiently. To obtain this effect reliably, it is preferably 20 microns or more.
- the present invention between the substantially concave spherical surface formed on the inner periphery of the outer ring that functions as the swing member and the substantially convex spherical surface formed on the outer periphery of the sleeve that functions as the swing center member, in order to provide a desired relative shape difference in the axial cross-sectional profile, for example, the following configuration can be employed.
- an axial cross-sectional profile of a substantially concave spherical surface formed on the inner periphery of the outer ring includes a main circular shape portion in the axial center portion formed as an arc that is a part of a circle, and an axis of the main circular shape portion.
- the structure formed from the linear shape part which is provided in the direction both ends and becomes a tangent with respect to the main circular shape part is employable. With this linear shape portion, it is possible to form a desired clearance with the substantially convex spherical surface formed on the outer periphery of the sleeve.
- both the axial cross-sectional profile of the substantially concave spherical surface formed on the inner periphery of the outer ring and the axial cross-sectional profile of the substantially convex spherical surface formed on the outer periphery of the sleeve are both formed as an arc that is a part of a circle.
- the radius of curvature of the arc of the side cross-sectional profile is set to be larger than the radius of curvature of the arc of the sleeve-side cross-sectional profile, and the center of curvature of the arc of the outer ring-side cross-sectional profile is offset from the center of curvature of the arc of the sleeve-side cross-sectional profile.
- the radius of curvature of the arc of the outer ring side cross-sectional profile is set to be larger than the radius of curvature of the arc of the sleeve side cross-sectional profile, so As the radius of curvature increases, the clearance increases, and the desired clearance as described above is formed between both spherical surfaces.
- an axial cross-sectional profile of a substantially concave spherical surface formed on the inner periphery of the outer ring has a main circular shape portion in the axial center portion formed as an arc that is a part of a circle, and an axis of the main circular shape portion A configuration is adopted in which it is connected to both ends in the direction and is in contact with the main circular shape portion, and is formed from a contact circle portion whose radius of curvature is larger than the curvature radius of the main circular shape portion.
- the outer ring in the rotation preventing mechanism of the rocking plate can be formed integrally with the rocking plate. This integration makes it possible to further reduce the number of parts, and is advantageous in terms of manufacturing and assembly costs.
- the guide grooves facing each other of the inner ring and the outer ring of the rotation prevention mechanism are formed at a relative angle of 30 to 60 degrees with respect to the central axis of the rotation main shaft, and constitute one ball guide.
- the grooves are arranged so as to be symmetrical with respect to a plane perpendicular to the main shaft and passing through the swing center of the swing plate when the relative angle between the inner ring shaft and the outer ring shaft is zero. It is possible.
- the guide grooves facing each other are arranged with a crossing angle within a predetermined range, and both guide grooves formed in a direction crossing each other are arranged symmetrically with respect to a plane passing through the rocking center of the rocking plate. This makes it possible for the ball held between the guide grooves to contact both guide grooves evenly and continuously, and to significantly reduce vibration and noise at this site. At the same time, the reliability can be greatly improved.
- two adjacent ball guides among the plurality of ball guides of the rotation prevention mechanism may be paired, and the pair of ball guides may be arranged in parallel to each other.
- the rotation direction backlash of the rotation prevention mechanism is largely determined by the relationship between the distance between the bottom of the pair of guide grooves installed on the inner and outer rings and the ball ball diameter. It becomes easy to set and manage the actual clearance, and it is possible to keep the backlash small by setting an appropriate clearance.
- the pair of ball guides arranged in parallel to each other may be arranged symmetrically with respect to a plane including the central axis of the rotation main shaft, or arranged in parallel to each other.
- a guide groove forming one of the ball guides may be arranged so that its axis is located on a plane including the central axis of the rotation main shaft.
- the contact load is further specified by specifying a specific power transmission direction. It becomes possible to reduce.
- a pair of two ball guides that are arranged approximately symmetrically with respect to the rotation main shaft is provided between the rotation main shafts, and the pair of ball guides are arranged in parallel to each other. It can also be set as the structure currently made.
- the rotation direction backlash in the rotation prevention mechanism is largely determined by the relationship between the distance between the bottom of the pair of guide grooves installed on the inner and outer rings and the ball ball diameter, so two ball guides arranged symmetrically By arranging them in parallel with each other, the actual clearance in both ball guides can be set and managed at a desired clearance at the same time. As a result, the setting and management of this clearance become easy, and it becomes possible to keep the play small.
- the pair of ball guides arranged in parallel to each other is preferably arranged so that the axis of the guide groove forming the ball guides is located on a plane including the central axis of the rotation main shaft. .
- the ball contact load can be minimized without selecting the power transmission direction.
- the oscillating plate type variable displacement compressor according to the present invention as described above can be applied as an oscillating plate type variable displacement compressor used in all fields, and is particularly small in size, improved in reliability, durable and quiet. It is suitable as a compressor for a vehicle that is highly demanded for improvement and cost reduction, particularly as a compressor for a vehicle air conditioner.
- a plurality of oscillating plate rotation preventing mechanisms using conventional constant velocity joints can be used for power transmission while suppressing backlash. It is possible to achieve a uniform and continuous contact of the balls, a small size, excellent durability and quietness, good rotation balance, easy to process and inexpensive rotation prevention mechanism. Thus, it is possible to provide an oscillating plate type variable displacement compressor having excellent performance that cannot be achieved.
- a sliding portion for swinging motion is set by providing a relative shape difference in the axial cross-sectional profile so that the clearance between both surfaces increases as it goes to both ends in the axial direction. It is possible to effectively prevent the occurrence of excessive surface pressure at the end portion of the steel sheet, eliminate the possibility of seizure and wear, and realize further excellent durability and quietness.
- FIG. 1 is a longitudinal sectional view of a swing plate type variable capacity compressor according to an embodiment of the present invention. It is a longitudinal cross-sectional view in another driving
- FIG. 2 is a schematic partial cross-sectional view showing an example of a rocking plate rotation prevention mechanism in the rocking plate type variable capacity compressor of FIG. 1. It is a schematic fragmentary sectional view which shows another example of the rocking
- FIG. 6 is a schematic partial cross-sectional view showing still another example of a rocking plate rotation blocking mechanism in the rocking plate type variable capacity compressor of FIG. 1. It is a partial front view which shows another example of a form of the rocking
- FIG. 10 is a partial front view showing still another embodiment of the swing plate type variable capacity compressor of FIG. 1, and FIGS. 10A and 10B show different examples.
- FIG. 11 is a partial front view showing still another embodiment of the swing plate type variable displacement compressor of FIG. 1, and FIGS. 11A and 11B show different examples.
- FIG. 1 shows an oscillating plate variable displacement compressor according to an embodiment of the present invention, and shows an overall structure in an operating state at the maximum discharge capacity.
- FIG. 2 shows the operating state at the minimum discharge capacity of the swing plate type variable capacity compressor of FIG. 1
- FIG. 3 shows the swing plate rotation prevention mechanism in the swing plate type variable capacity compressor of FIG. The main part including it is shown in an exploded perspective view.
- a swing plate type variable displacement compressor 1 has a housing 2 disposed in the center as a housing, and a front housing 3 and a rear housing 4 disposed on both sides thereof. From the outside to the position extending through the front housing 3, a rotation main shaft 5 to which rotational driving power is input from the outside is provided.
- a rotor 6 is fixed to the rotary main shaft 5 so as to be able to rotate integrally with the main shaft 5, and a swash plate 8 is connected to the rotor 6 via a hinge mechanism 7 so that the swash plate 8 can change its angle and rotate together with the rotary main shaft 5.
- a piston 10 is inserted into each cylinder bore 9 such that the piston 10 can reciprocate.
- the piston 10 is connected to a swing plate 12 via a connecting rod 11.
- the rotational motion of the swash plate 8 is converted into the rocking motion of the rocking plate 12, and the rocking motion is transmitted to the piston 10 via the connecting rod 11, whereby the piston 10 is reciprocated.
- a fluid to be compressed (for example, refrigerant gas) from a suction chamber 13 formed in the rear housing 4 passes through a suction hole 15 (suction valve is not shown) formed in the valve plate 14 as the piston 10 reciprocates.
- suction valve suction valve is not shown
- the oscillating plate 12 needs to oscillate while being prevented from rotating. In the following, the remaining part of the compressor 1 will be described with reference to FIGS.
- the rotation prevention mechanism 21 of the swing plate 12 is provided such that (a) the rotation is prevented in the housing 2 but is movable in the axial direction, and the rotation main shaft 5 is relatively moved at the inner diameter portion via a bearing 22 (radial bearing).
- An inner ring 27 having a plurality of guide grooves 26 for guiding a plurality of balls 25 provided for power transmission, and supporting the rotation and axial movement of each of the balls 25; and (b) swinging the swinging plate 12. It functions as a rocking center member for movement, and is provided on the rotation main shaft 5 via a bearing 23 (radial bearing) so as to be relatively rotatable and axially movable with respect to the rotation main shaft.
- the sleeve 24 is movably engaged, and (c) has a plurality of guide grooves 28 for guiding the balls 25 at positions facing the respective guide grooves 26 of the inner ring 27, and is swingably supported by the sleeve 24.
- the outer ring 30 is fixedly connected to the outer periphery of the swing plate 12 and rotatably supports the swash plate 8 via a bearing 29 (radial bearing), and (d) the inner ring 27 and the outer ring 30 are opposed to each other. And a plurality of balls 25 that transmit power by being compressed between the guide grooves 26, 28.
- Thrust bearings 31 and 32 are interposed between the swing plate 12 and the swash plate 8 and between the rotor 6 and the front housing 3, respectively.
- the inner ring 27 is supported in the housing 9 so as to be movable in the axial direction, but is prevented from rotating.
- a general rotation restricting means such as a key or a spline may be used (not shown).
- the rear end of the rotary main shaft 5 is supported by a bearing 22 installed on the inner diameter portion of the inner ring 27.
- the rotary main shaft 5 also has a bearing 33 (radial bearing) on the front housing 3 side with the compression main mechanism portion interposed therebetween. Since it is rotatably supported via both sides, it is supported in the radial direction on both sides (both supported).
- the outer ring 30 is supported by the sleeve 24 through spherical contact so as to be swingable (the detailed structure of this part will be described later), and the sleeve 24 Is supported on the rotary main shaft 5 so as to be rotatable and movable in the axial direction, thereby reducing the radial play between the rotary main shaft 5 and the entire swinging mechanism portion, and thus providing reliable operation. Improvement, vibration and noise reduction are possible.
- the rotary main shaft 5 is supported at both ends by the bearing 22 installed on the inner diameter portion of the inner ring 27 and the bearing 33 provided on the front housing 3 side with the compression main mechanism portion interposed therebetween. Therefore, even if the main shaft 5 has a relatively small diameter, a sufficiently high rigidity can be ensured, and the swinging of the main shaft 5 can be suppressed to a small size, so that the size can be easily reduced and the reliability can be improved. Improvement, vibration and noise reduction are possible. Further, as a result of suppressing the swing of the rotating main shaft 5 to be small, the swing of the entire rotating portion rotated together with the rotating main shaft 5 is also suppressed to be small, and the rotation balance of the entire rotating portion is extremely improved. In the above configuration, it is possible to replace the rotary main shaft 5 with a structure that extends rearward and is directly supported by the housing 2 via a bearing.
- the spherical surface (concave spherical surface) formed on the inner diameter side of the inner ring 27 and the spherical surface (convex spherical surface) formed on the outer diameter side of the sleeve 24 are mutually supported.
- this support part By adjusting the clearance of this support part, it is possible to absorb the relative swirling of the inner and outer rings due to variations in the guide groove positions of a plurality of balls acting for power transmission.
- the ball 25 can be evenly and continuously contacted, which is more advantageous in terms of reliability, vibration and noise.
- the outer ring 30 and the swing plate 12 are configured as separate members and fixed to each other. However, they can be formed integrally. This integration can further reduce the number of parts and facilitate assembly.
- FIG. 4 shows a state in which the relative angle between the inner and outer rings is zero in the rotation blocking mechanism 21 of the swing plate 12.
- the guide grooves 26 and 28 formed in the inner ring 27 and the outer ring 24 of the rotation prevention mechanism 21 are relatively angled with respect to the central axis of the rotation main shaft 5 (within a range of 30 to 60 degrees). Relative angle).
- a guide groove 26 formed on the inner ring 27 (the axis of the guide groove 26 is indicated by 42) and a guide groove 28 formed on the outer ring 30 (the guide groove 28 of the guide groove 28) constitute one ball guide 41 and face each other.
- the rotation direction backlash of the rotation prevention mechanism is largely determined by the relationship between the distance between the bottom of the pair of guide grooves installed on the inner and outer rings and the ball ball diameter. Management becomes easy, and it becomes possible to keep the backlash small by setting an appropriate clearance.
- the plurality of balls 25 acting for power transmission are supported in the compression direction between the guide grooves 26 and 28 facing each other with the balls 25 interposed therebetween, and perform power transmission. Since the ball 25 is held so as to be held by the opposing guide grooves 26 and 28 and contacts both the guide grooves 26 and 28, a sufficiently large contact area between the ball 25 and the respective guide grooves 26 and 28 is ensured. As a result, the contact surface pressure can be reduced, and the structure is extremely advantageous in terms of reliability, vibration, and quietness. Further, the ball diameter of the ball 25 can be reduced, and the entire rotation prevention mechanism can be reduced in size.
- a load applied to the ball 25 given as a moment about the rotation spindle 5 is generated as a normal force of the actual contact surface.
- the pair of ball guides 45 arranged parallel to each other have the center axis 5a of the rotating spindle 5 as shown in FIG.
- the two guide groove shafts 46 formed on the inner and outer rings are arranged symmetrically with respect to the plane 47 including the central axis 5a of the rotation main shaft 5 by being arranged symmetrically with respect to the plane 47 including the rotation.
- a relative shape difference is provided in the axial cross-sectional profile between the substantially convex spherical surface formed on the outer periphery of the sleeve 24 that functions as an axial end of the contact portion between the substantially concave spherical surface and the substantially convex spherical surface.
- the shape difference is set so that the clearance between both surfaces becomes larger as going to the part.
- the clearance between both surfaces at both axial ends of the contact portion is set to 20 microns or more.
- the axial cross-sectional profile of the substantially concave spherical surface 51a formed on the inner periphery of the outer ring 30a functioning as a swing member is the main axial center portion formed as an arc that is part of a circle.
- a circular shape portion 52 and linear shape portions 53 that are provided at both axial ends of the main circular shape portion 52 and are tangent to the main circular shape portion 52 are formed. With this linear shape portion 53, it is possible to form a desired clearance with the substantially convex spherical surface 54 a formed on the outer periphery of the sleeve 24 a functioning as a swing center member.
- the curvature radius R1 of the main circular shape portion 52 of the outer ring 30a other than the linear shape portion 53 and the curvature radius R2 of the substantially convex spherical surface 54a of the sleeve 24a may be substantially the same, and the positions of the centers of curvature C1 are also the same. Location.
- the linear shape portions 53 on both sides of the main circular shape portion 52 of the substantially concave spherical surface 51a, the clearance between the linear shape portion 53 and the substantially convex spherical surface 54a of the sleeve 24a is pivoted.
- the axial cross-sectional profile of the spherical surface 54b is formed as an arc that is part of a circle, and the radius of curvature R3 of the arc of the outer ring side cross-sectional profile is set to be larger than the radius of curvature R4 of the arc of the sleeve-side cross-sectional profile.
- the center of curvature C2 of the arc of the outer ring side cross-sectional profile is offset from the center of curvature C3 of the arc of the sleeve side cross-sectional profile by ⁇ on the same axis in the plane 55 including the center of oscillation.
- the radius of curvature R3 of the arc of the outer ring side cross-sectional profile is set larger than the radius of curvature R4 of the arc of the sleeve side cross-sectional profile.
- the clearance becomes larger according to the difference in the radius of curvature toward the end of the direction, and the clearance targeted by the present invention is formed between both spherical surfaces.
- the axial cross-sectional profile of the substantially concave spherical surface 51c formed on the inner periphery of the outer ring 30c functioning as a swing member is the main axial central portion formed as an arc that is part of a circle.
- a circular shape portion 56 (the range of the main circular shape portion 56 is indicated by reference numeral 57), and is connected to both axial ends of the main circular shape portion 56 to be in contact with the main circular shape portion 56;
- the tangent circle has a radius of curvature R5 that is larger than the radius of curvature R6 of the main circular shape portion 56.
- the center of curvature of the main circular shape portion 56 and the center (curvature center) of the curvature radius R7 of the substantially convex spherical surface 54c formed on the outer periphery of the sleeve 24c functioning as the swing center member are the same center of curvature C4.
- the center of curvature C5 of the tangent circle 58 is offset by a predetermined amount on the same axis within the surface 55 including the center of oscillation.
- the center of curvature C5 of the tangent portion 58 does not necessarily need to be located on the same axis within the surface 55 including the center of oscillation with respect to the center of curvature C4.
- a clearance that is a target in the present invention is formed between the main circular shape portion 56 and the substantially convex spherical surface 54c formed on the outer periphery of the sleeve 24c.
- the substantially concave spherical surface formed on the inner periphery of the outer rings 30a, 30b, 30c functioning as the swing member, and the swing center member A relative shape difference is appropriately provided in the axial sectional profile between the substantially convex spherical surfaces formed on the outer circumferences of the functioning sleeves 24a, 24b, and 24c, and the contact portion between the substantially concave spherical surface and the substantially convex spherical surface.
- the desired shape difference is set so that the clearance between both surfaces increases as it goes to both ends in the axial direction. The surface pressure at the part) is relieved, and excessive surface pressure is prevented from being generated at this end part.
- this sliding part is located at the center of the rotating part, it may be difficult to obtain sufficient lubrication stably as described above.
- the occurrence of excessive surface pressure is prevented as described above, The occurrence of sticking and wear is surely prevented, and excellent durability and quietness are realized for this sliding portion. As a result, excellent durability and quietness are realized as the whole compressor.
- one of a pair of ball guides 61 acting mainly in the outer ring power transmission direction 62 is shown.
- the shaft 64 of the guide groove in the ball guide 63 is offset on a plane 65 including the central axis 5a of the rotating main shaft 5 to further limit the contact to a specific power transmission direction. It is possible to reduce the load.
- reference numeral 66 indicates the inner ring power transmission direction.
- FIG. 10 (A) or (B) show different examples
- the rotation main shaft 5 is interposed.
- a configuration in which the shafts 72 of the guide grooves formed in the inner ring 27 and the outer ring 30 are arranged in parallel to each other may be employed.
- the rotation direction backlash in the rotation prevention mechanism is roughly determined by the relationship between the distance between the bottom of the pair of guide grooves installed on the inner ring 27 and the outer ring 30 and the ball ball diameter, and thus is arranged symmetrically.
- FIG. 11 (A) and FIG. 11 (B) are different from each other.
- the pair of ball guides 81 arranged in parallel to each other are arranged such that the shaft 82 of the guide groove forming the ball guides is located on the plane 83 including the central axis 5a of the rotation main shaft 5. It can be set as the structure which has. With such a configuration, the ball contact load is minimized regardless of the power transmission direction.
- FIG. 11 (B) the structure in the case of the rocking
- the oscillating plate type variable displacement compressor according to the present invention can be applied to an oscillating plate type variable displacement compressor used in various fields, and in particular, downsizing, improvement in reliability, improvement in durability, quietness, and cost reduction. It is suitable for use in the field of vehicles for which demand is high, especially for vehicle air conditioners.
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Abstract
Description
前記回転阻止機構を、(a)ハウジング内に回転は阻止されるが軸方向に移動可能に設けられ、内径部において軸受を介して前記回転主軸を相対回転および軸方向に相対移動可能に支持するとともに、動力伝達用に設けられた複数のボールをガイドするための複数のガイド溝を有する内輪と、(b)前記揺動板の揺動運動の揺動中心部材として機能し、前記回転主軸上に該回転主軸に対し相対回転および軸方向に移動可能に設けられ、前記内輪に該内輪とともに軸方向に移動可能に係合されたスリーブと、(c)前記内輪の各ガイド溝に対向する位置に前記ボールをガイドするための複数のガイド溝を有し、前記スリーブに揺動可能に支持され、外周に前記揺動板が固定連結された外輪と、(d)前記内輪および外輪に形成された互いに対向するガイド溝によって保持され、該ガイド溝間で圧縮されることにより動力伝達を行う複数のボールと、を有する機構から構成するとともに、
前記回転阻止機構における前記遥動板を遥動可能に連結するための遥動部材として機能する前記外輪の内周に形成された略凹球面と、遥動中心部材として機能する前記スリーブの外周に形成された略凸球面との間に、軸方向断面プロファイルにて相対的な形状差を設け、前記略凹球面と略凸球面との接触部の軸方向両端部にいくにしたがって両面間のクリアランスが大きくなるように前記形状差を設定したことを特徴とするものからなる。ここで、外輪は、斜板を軸受を介して回転可能に支持する構造とすることができる。あるいは、斜板を軸受を介して、遥動板に回転可能に支持させる構造とすることもできる。
2 ハウジング
3 フロントハウジング
4 リアハウジング
5 回転主軸
5a 中心軸
6 ロータ
7 ヒンジ機構
8 斜板
9 シリンダボア
10 ピストン
11 コネクティングロッド
12 揺動板
13 吸入室
14 バルブプレート
15 吸入孔
16 吐出孔
17 吐出室
21 揺動板の回転阻止機構
22、23、29、33 軸受
24、24a、24b、24c スリーブ
25 ボール
26 内輪のガイド溝
27 内輪
28 外輪のガイド溝
30、30a、30b、30c 外輪
31、32 スラスト軸受
41 ボールガイド
42、43 ガイド溝の軸
44 揺動中心を通る平面
45 一対のボールガイド
46 内、外輪に形成されたガイド溝の軸
47 回転主軸の中心軸を含む平面
51a、51b、51c 外輪の略凹球面
52 主円形形状部
53 直線形状部
54a、54b、54c スリーブの略凸球面
55 揺動中心を含む面
56 主円形形状部
57 主円形形状部の範囲
58 接円部
61 一対のボールガイド
62 外輪動力伝達方向
63 一方のボールガイド
64 ガイド溝の軸
65 回転主軸の中心軸を含む平面
66 内輪動力伝達方向
71 一対のボールガイド
72 ガイド溝の軸
81 一対のボールガイド
82 ガイド溝の軸
83 回転主軸の中心軸を含む平面
84 外輪が一体形成された揺動板
まず、本発明のに係る揺動板式可変容量圧縮機の全体構成例について図1~図5を参照して説明し、次に図6~図8を参照して、揺動板回転阻止機構における遥動部材として機能する外輪の内周に形成された略凹球面と、遥動中心部材として機能するスリーブの外周に形成された略凸球面との間に、軸方向断面プロファイルにて相対的な形状差が持たせる構成例について説明する。
Claims (13)
- シリンダボア内に往復動可能に挿入されたピストンと、回転主軸とともに回転され該主軸に対し変角可能に支持された斜板と、前記ピストンに連結され前記斜板の回転運動が自身の揺動運動へと変換され該揺動運動を前記ピストンに伝達してピストンを往復動させる揺動板と、該揺動板の回転阻止機構とを備えた揺動板式可変容量圧縮機において、
前記回転阻止機構を、(a)ハウジング内に回転は阻止されるが軸方向に移動可能に設けられ、内径部において軸受を介して前記回転主軸を相対回転および軸方向に相対移動可能に支持するとともに、動力伝達用に設けられた複数のボールをガイドするための複数のガイド溝を有する内輪と、(b)前記揺動板の揺動運動の揺動中心部材として機能し、前記回転主軸上に該回転主軸に対し相対回転および軸方向に移動可能に設けられ、前記内輪に該内輪とともに軸方向に移動可能に係合されたスリーブと、(c)前記内輪の各ガイド溝に対向する位置に前記ボールをガイドするための複数のガイド溝を有し、前記スリーブに揺動可能に支持され、外周に前記揺動板が固定連結された外輪と、(d)前記内輪および外輪に形成された互いに対向するガイド溝によって保持され、該ガイド溝間で圧縮されることにより動力伝達を行う複数のボールと、を有する機構から構成するとともに、
前記回転阻止機構における前記遥動板を遥動可能に連結するための遥動部材として機能する前記外輪の内周に形成された略凹球面と、遥動中心部材として機能する前記スリーブの外周に形成された略凸球面との間に、軸方向断面プロファイルにて相対的な形状差を設け、前記略凹球面と略凸球面との接触部の軸方向両端部にいくにしたがって両面間のクリアランスが大きくなるように前記形状差を設定したことを特徴とする揺動板式可変容量圧縮機。 - 前記接触部の軸方向両端部におけるクリアランスが20ミクロン以上となるように前記形状差が設定されている、請求項1に記載の揺動板式可変容量圧縮機。
- 前記外輪の内周に形成された略凹球面の軸方向断面プロファイルが、円の一部である円弧として形成された軸方向中央部の主円形形状部と、該主円形形状部の軸方向両端部に設けられ主円形形状部に対して接線となる直線形状部とから形成されている、請求項1に記載の揺動板式可変容量圧縮機。
- 前記外輪の内周に形成された略凹球面の軸方向断面プロファイルと前記スリーブの外周に形成された略凸球面の軸方向断面プロファイルがともに円の一部である円弧として形成され、外輪側断面プロファイルの円弧の曲率半径がスリーブ側断面プロファイルの円弧の曲率半径よりも大きく設定されているとともに、外輪側断面プロファイルの円弧の曲率中心がスリーブ側断面プロファイルの円弧の曲率中心に対しオフセットされている、請求項1に記載の揺動板式可変容量圧縮機。
- 前記外輪の内周に形成された略凹球面の軸方向断面プロファイルが、円の一部である円弧として形成された軸方向中央部の主円形形状部と、該主円形形状部の軸方向両端部に接続されて主円形形状部に対して接円となり、かつ、その接円の曲率半径が主円形形状部の曲率半径より大きくなる接円部とから形成されている、請求項1に記載の揺動板式可変容量圧縮機。
- 前記外輪が前記揺動板と一体に形成されている、請求項1に記載の揺動板式可変容量圧縮機。
- 前記回転阻止機構の内輪および外輪の互いに対向するガイド溝が、回転主軸の中心軸に対して30~60度の相対角度をもって形成され、かつ一つのボールガイドを構成する、互いに対向するガイド溝が、内輪の軸と外輪の軸との相対角度がゼロの状態にて主軸に垂直でかつ揺動板の揺動中心を通る平面に対し対称形態になるように配置されている、請求項1に記載の揺動板式可変容量圧縮機。
- 前記回転阻止機構の複数のボールガイドのうち、隣り合った2つのボールガイドを一対とし、該一対のボールガイドが互いに平行に配置されている、請求項7に記載の揺動板式可変容量圧縮機。
- 前記互いに平行に配置された一対のボールガイドが、回転主軸の中心軸を含む平面に対して対称に配置されている、請求項8に記載の揺動板式可変容量圧縮機。
- 前記互いに平行に配置された一対のボールガイドのうち一方のボールガイドを形成するガイド溝が、その軸が回転主軸の中心軸を含む平面上に位置するように配置されている、請求項8に記載の揺動板式可変容量圧縮機。
- 前記回転阻止機構の複数のボールガイドのうち、回転主軸を間に回転主軸に対しておおよそ対称に配置された2つのボールガイドを一対とし、該一対のボールガイドが互いに平行に配置されている、請求項7に記載の揺動板式可変容量圧縮機。
- 前記互いに平行に配置された一対のボールガイドが、それらボールガイドを形成するガイド溝の軸が回転主軸の中心軸を含む平面上に位置するように配置されている、請求項11に記載の揺動板式可変容量圧縮機。
- 車両空調装置用圧縮機からなる、請求項1に記載の揺動板式可変容量圧縮機。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP08867117.7A EP2236826B1 (en) | 2007-12-28 | 2008-12-11 | Wobble plate type variable displacement compressor |
CN2008801232333A CN101910628B (zh) | 2007-12-28 | 2008-12-11 | 变容量摆动板式压缩机 |
US12/809,457 US8549985B2 (en) | 2007-12-28 | 2008-12-11 | Wabble plate type variable displacement compressor |
US14/049,073 US9228573B2 (en) | 2007-12-28 | 2013-10-08 | Wabble plate type variable displacement compressor |
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JP2007-339454 | 2007-12-28 | ||
JP2007339454A JP5164563B2 (ja) | 2007-12-28 | 2007-12-28 | 揺動板式可変容量圧縮機 |
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US12/809,457 A-371-Of-International US8549985B2 (en) | 2007-12-28 | 2008-12-11 | Wabble plate type variable displacement compressor |
US14/049,073 Continuation US9228573B2 (en) | 2007-12-28 | 2013-10-08 | Wabble plate type variable displacement compressor |
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WO2009084395A1 true WO2009084395A1 (ja) | 2009-07-09 |
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PCT/JP2008/072473 WO2009084395A1 (ja) | 2007-12-28 | 2008-12-11 | 揺動板式可変容量圧縮機 |
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US (2) | US8549985B2 (ja) |
EP (1) | EP2236826B1 (ja) |
JP (1) | JP5164563B2 (ja) |
CN (1) | CN101910628B (ja) |
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JP5164563B2 (ja) * | 2007-12-28 | 2013-03-21 | サンデン株式会社 | 揺動板式可変容量圧縮機 |
JP5065158B2 (ja) * | 2008-06-02 | 2012-10-31 | サンデン株式会社 | 揺動板式可変容量圧縮機 |
JP5065160B2 (ja) | 2008-06-02 | 2012-10-31 | サンデン株式会社 | 揺動板式可変容量圧縮機 |
JP5130121B2 (ja) * | 2008-06-05 | 2013-01-30 | サンデン株式会社 | 揺動板式可変容量圧縮機 |
JP6063150B2 (ja) * | 2012-05-28 | 2017-01-18 | サンデンホールディングス株式会社 | 可変容量圧縮機 |
US9816377B2 (en) * | 2014-09-24 | 2017-11-14 | Eaton Corporation | Hydraulic axial-piston device with features to enhance efficiency and power density |
JP6470086B2 (ja) * | 2015-03-31 | 2019-02-13 | サンデンホールディングス株式会社 | 揺動板式可変容量圧縮機 |
WO2022266730A1 (pt) * | 2021-06-22 | 2022-12-29 | Silva Fabio | Principio de conversao mecanica de movimento por eixo inclinado |
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- 2008-12-11 US US12/809,457 patent/US8549985B2/en not_active Expired - Fee Related
- 2008-12-11 EP EP08867117.7A patent/EP2236826B1/en not_active Not-in-force
- 2008-12-11 CN CN2008801232333A patent/CN101910628B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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US8549985B2 (en) | 2013-10-08 |
CN101910628A (zh) | 2010-12-08 |
US9228573B2 (en) | 2016-01-05 |
US20140064991A1 (en) | 2014-03-06 |
EP2236826B1 (en) | 2016-08-10 |
JP2009162064A (ja) | 2009-07-23 |
JP5164563B2 (ja) | 2013-03-21 |
EP2236826A4 (en) | 2014-12-03 |
EP2236826A1 (en) | 2010-10-06 |
CN101910628B (zh) | 2013-05-22 |
US20110229347A1 (en) | 2011-09-22 |
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