WO1998029658A1 - Compresseur a plateau incline a deplacement variable - Google Patents

Compresseur a plateau incline a deplacement variable Download PDF

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Publication number
WO1998029658A1
WO1998029658A1 PCT/JP1996/003771 JP9603771W WO9829658A1 WO 1998029658 A1 WO1998029658 A1 WO 1998029658A1 JP 9603771 W JP9603771 W JP 9603771W WO 9829658 A1 WO9829658 A1 WO 9829658A1
Authority
WO
WIPO (PCT)
Prior art keywords
swash plate
joint
bush
variable displacement
drive shaft
Prior art date
Application number
PCT/JP1996/003771
Other languages
English (en)
Japanese (ja)
Inventor
Masaki Ota
Hisakazu Kobayashi
Youichi Okadome
Masaru Hamasaki
Original Assignee
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Toyoda Jidoshokki Seisakusho filed Critical Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Priority to PCT/JP1996/003771 priority Critical patent/WO1998029658A1/fr
Publication of WO1998029658A1 publication Critical patent/WO1998029658A1/fr

Links

Classifications

    • 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
    • F04B27/14—Control
    • F04B27/16—Control of pumps with stationary cylinders
    • F04B27/18—Control of pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B27/1804—Controlled by crankcase pressure
    • 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

Definitions

  • the present invention relates to a variable displacement swash plate type compressor used for an air conditioner or the like of a vehicle.
  • Vehicles are equipped with various compressors in order to provide air conditioning inside the vehicle.
  • a variable capacity swash plate type compressor disclosed in Japanese Patent Application Laid-Open No. H06-288347 is known.
  • the compressor described in FIG. 7 quoted from this publication includes a hinge mechanism K that allows the swash plate 14 to tilt.
  • the hinge mechanism K has a support arm 17 protruding rearward from the rotor 16 and a guide bin 18 having a base end fixed to the swash plate 14.
  • the support arm 17 is provided with a hole 50 having a circular cross section.
  • the hole 50 extends on a plane including the axis O of the drive shaft 6 and extends radially toward the axis O of the drive shaft 6.
  • a sphere 18 a that fits into the hole 50 is attached to the tip of the guide bin 18.
  • the contact pressure is high because the sphere 18a is in line contact with the inner surface of the hole 50.
  • the cylinder is formed by dividing the cylinder into two along the axis, regardless of the spherical body 18a and the hole 50.
  • a pair of stiffeners 40 are provided. The inner surface and the outer surface of each shell 40 are in surface contact with the sphere 18 and the inner surface of the hole 50, respectively.
  • the abrasion of the sphere 18a and the inner surface of the hole 50 is much less Is prevented.
  • the worker holds it by hand or does not rely on any support means. As long as the partial covering state cannot be maintained.
  • such support means often hinders when the shoe 40 covering the sphere 18a is further pushed into the inside of the hole 50, which causes a problem that the assembling work becomes complicated.
  • An object of the present invention it is possible to prevent wear of the hinge mechanism, the disclosure of c invention is to provide a variable displacement compressor having a hinge mechanism capable of performing the assembling easily
  • a variable displacement swash plate type compressor includes a cylinder block having a plurality of bores, and a housing forming a crank chamber in cooperation with the cylinder block. .
  • the drive shaft is rotatably supported by the cylinder block and the housing.
  • the rotor is fixed to the drive shaft in the crank chamber.
  • the swash plate is slidably and tiltably supported by the drive shaft. Changing the inclination of the swash plate changes the capacity.
  • the hinge mechanism operatively connects the swash plate to the rotor.
  • the plurality of pistons reciprocate in each bore in conjunction with the rotation of the swash plate.
  • the hinge mechanism has a guide bin projecting from the swash plate and having a joint.
  • the support arm protrudes from the rotor and has a hole for receiving the coupling and extending toward the drive shaft.
  • the bush is slidably received in a hole in the support arm.
  • the bush has an internal space for accommodating the guide bin joint, and the internal space allows the joint to rotate when the inclination of the swash plate changes.
  • the bush is provided with a slit to widen the internal space when installing the joint.
  • the joint of the guide bin rotates in the internal space of the bush, and the outer surface of the bush slides in the hole of the support arm.
  • the bush is formed as a single piece, and by expanding the slit, It can be easily attached to a joint.
  • the bushing after mounting without requiring any special support can be inserted into the guide earthenware teapot in company extremely easily support arm hole ⁇ (Thus, it can simplify the assembly of the bushing, the increase of the productivity of the compressor Brief description of the drawings
  • FIG. 1 is an embodiment of a compressor embodying the present invention, and is a cross-sectional view of the compressor at maximum capacity.
  • FIG. 2 is a cross-sectional view of the compressor of FIG. 1 at a minimum capacity.
  • FIG. 3 is a plan view of a push used in the compressor of FIG.
  • FIG. 4 is a sectional view taken along line 4-4 in FIG.
  • FIG. 5 is a cross-sectional view showing a relationship between another bush and a guide bin.
  • FIG. 6 is a cross-sectional view showing the relationship between yet another bush and a guide bin.
  • FIG. 7 is a cross-sectional view showing a conventional compressor.
  • FIG. 8 is a partial perspective view showing a conventional guide bin. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIGS. 1 and 2 a front housing 2 is joined to a front end of a cylinder block 1, and a rear housing 3 is joined to a rear end via a valve plate 4.
  • a drive shaft 6 is accommodated in a crank chamber 5 formed by the cylinder block 1 and the front housing 2, and the drive shaft 6 is rotatably supported by bearings 7a and 7b.
  • a plurality of bores 9 located around the drive shaft 6 are bored in the cylinder block 1, and each of the bores 9 accommodates a bistone 10 in a reciprocating manner.
  • the rotor 11 In the crank chamber 5, the rotor 11 is fixed to the drive shaft 6. A bearing 8 is provided between the rotor 11 and the front housing 2. A spherical sleeve 12 is slidably supported on the drive shaft 6. Between the rotor 1 1 and the spherical sleeve 1 2 pressing spring 1 3 is interposed, the spring 1 3 spherical sleeve 1 2 rearwardly It is urging towards. A swash plate 14 is supported on the outer peripheral surface of the spherical sleeve 12 in a tiltable manner.
  • the contact surface 14 a provided on the front surface of the swash plate 14 is in contact with the rotor 11.
  • the swash plate 14 is restricted to the maximum inclined position.
  • the swash plate 14 is pressed rearward together with the spherical sleeve 12 by the extension of the pressing spring 13, and the spherical sleeve 12 is pressed by the stopper 30 locked to the drive shaft 6.
  • the swash plate 14 is regulated to the minimum inclined position.
  • Each piston 10 has a concave portion, and the concave portion has a support surface 10a formed of a spherical surface.
  • Each support surface 10a accommodates a pair of shoes 15.
  • Each of the pair of shoes 15 is formed in a substantially hemispherical shape, and slidably contacts the supporting surface 10a of each piston 10 on the hemispherical surface, and slides on the outer surface of the swash plate 14 on its flat surface. It is movably in contact. With the rotation of the swash plate 14, each of the bistons 10 is reciprocated via the sleeves 15.
  • a bracket 19 constituting the hinge mechanism K is protruded on the front surface of the swash plate 14.
  • a guide pin 18 is fixed to the bracket 19 at its proximal end.
  • a joint 18 a is formed, which is a sphere partially pressed.
  • a support arm 16 constituting a hinge mechanism K is provided on the rear surface of the rotor 11 so as to extend substantially parallel to the axis 0 of the drive shaft.
  • a hole 16a is formed at the tip of the support arm 16. The hole 16a is located on a plane including the axis O of the drive shaft, extends toward the axis O of the drive shaft, and is further inclined rearward toward the axis O of the drive shaft. .
  • a bush 17 formed in a substantially cylindrical shape from a non-conductive material such as a steel plate is interposed between the joint 18a of the guide bin 18 and the hole 16a.
  • This bush 1 7 has a hole 1
  • the inner surface of the bush 17 has a substantially spherical shape and rotatably supports the joint 18 a of the guide pin 18.
  • the bush 17 is a slit 1 extending in the longitudinal direction.
  • a suction chamber 2 ⁇ and a discharge chamber 21 are formed in the rear housing 3.
  • a suction port 22 and a discharge port 23 are formed in the valve plate 4 corresponding to the bore 9.
  • the compression chamber formed between the valve plate 4 and the piston 10 communicates with the suction chamber 20 and the discharge chamber 21 via the suction port 22 and the discharge port 23.
  • Each suction port 22 is provided with a suction valve 24 that opens and closes the suction port 22 in accordance with the reciprocation of the biston 10.
  • Each discharge port 23 is provided with a discharge valve 26 that opens and closes while restricting the discharge port 23 by a retainer 25 in accordance with the reciprocation of the biston 10.
  • the rear housing 3 is equipped with a control valve (not shown) for adjusting the pressure of the crank chamber 5.
  • each piston 10 reciprocates in the bore 9 via the shoe 15. .
  • the refrigerant gas is sucked into the compression chamber from the suction chamber 20, and the refrigerant gas is compressed and then discharged to the discharge chamber 21.
  • the volume of the refrigerant gas discharged to the discharge chamber 21 is controlled by adjusting the pressure in the crank chamber 5 by the control valve.
  • the pressure in the crank chamber 5 decreases due to the pressure adjustment of the control valve, the back pressure acting on the piston 10 decreases.
  • the swash plate 14 moves forward together with the spherical sleeve 12 against the pressing spring 13 while increasing its inclination around the spherical sleeve 12.
  • the stroke of the piston 10 becomes maximum, and the discharge capacity becomes maximum.
  • the joint 18 a of the guide pin 18 rotates clockwise around the spherical sleeve 12 along the inner surface of the hole 17 a of the bush 17 as shown in FIG. While moving, it moves inside the hole 16a together with the bush 17 toward the outside of the compressor.
  • the bush 17 is formed as a single unit, and can be easily mounted on the joint 18a by expanding the slit 17b. Therefore, the bush 17 after the mounting can be extremely easily inserted into the hole 16a together with the guide bin without requiring special support. Therefore, the assembly of the push 17 can be simplified, and the productivity of the compressor can be improved.
  • the inner surface of the bush 117 for pivotally holding the joint 18a comprises a compound conical surface 117 comprising two conical surfaces with a common bottom. It is formed of a.
  • the spherical surface of the joint 18a is in line contact with the compound conical surface 117a at two points. Therefore, the contact pressure is reliably reduced as compared with the related art in which the joint 18a is in line contact with the hole 16a at one point. Therefore, an appropriate wear prevention effect can be expected.
  • the bush 217 for rotatably holding the joint 18a includes a pair of ridges 217b projecting inward at the periphery of the opening. .
  • Each ridge 2 17 b regulates the linear movement of the joint 18 a by engaging with the joint 18 a.
  • the spherical surface of the joint 18a is in linear contact with the inner surface of the hole 21a of the bushing 17 at one place.
  • the sliding distance in the conventional technology is determined by the component derived from the rotation of the joint 18a around the sleep 12 and the hole 17a.
  • the sliding distance in this embodiment is ⁇ r r
  • r is the radius of the joint 18a
  • 0 is the approximate rotation angle of the joint around the sleeve, expressed as the rotation angle of the joint about its own axis.
  • Each of the bushes described above can be manufactured as a single component by press-forming a steel plate, and various types of wear-resistant treatments such as nitrocarburizing can be easily performed.
  • various types of wear-resistant treatments such as nitrocarburizing can be easily performed.
  • no special hardening treatment is required on the inner surface of the hole 16a where direct line contact with the fiber 18a does not occur. Therefore, the degree of freedom in material selection can be expanded by using iron for the material of the rotor 11 or the like.
  • variable displacement swash plate type compressor As described above, in the variable displacement swash plate type compressor according to the present invention, the wear of the joint of the guide bin and the hole of the support arm in the hinge mechanism is suppressed by the presence of the bush. In addition, the push assembly can be simplified, and the productivity of the compressor can be improved.

Abstract

L'invention concerne un compresseur à plateau incliné à déplacement variable, dont le déplacement varie en fonction de l'angle d'inclinaison d'un plateau incliné (14). Ledit compresseur comprend un bloc-cylindres (1) muni d'une pluralité de trous (9) et un boîtier (2) qui coopère avec le bloc-cylindres (1) pour définir un carter (5). Un arbre d'entraînement (6) est soutenu de façon rotative par le bloc-cylindres (1) et le boîtier (2). Un rotor (11) est fixé à l'arbre d'entraînement (6) à l'intérieur du carter (5). Le plateau incliné (14) est supporté de façon coulissante et inclinable par l'arbre d'entraînement (6). Un mécanisme d'articulation (K) raccorde de façon fonctionnelle le plateau incliné (14) au rotor (11). Une pluralité de pistons (10) sont reliés par liaison de forme et de façon rotative au plateau incliné (14), afin d'être animé d'un mouvement alternatif dans les trous respectifs (9). Le mécanisme d'articulation (K) présente un tenon de guidage (18) qui fait saillie par rapport au plateau incliné (14) et est muni d'un accouplement (18a). Un bras de support (16) fait saillie par rapport au rotor (11) et est muni d'un trou (16a) qui reçoit l'accouplement (18a) et s'étend vers l'arbre d'entraînement (6). Une douille (17) peut coulisser dans le trou (16a) du bras de support (16). La douille (17) présente un espace intérieur qui reçoit l'accouplement (18a) du tenon de guidage (18) et permet la rotation de l'accouplement (18a) lorsqu'un angle d'inclinaison du plateau incliné (14) doit être modifié. La douille (17) présente une fente (17b) qui permet une expansion de l'espace intérieur lorsqu'elle est montée sur l'accouplement (18a).
PCT/JP1996/003771 1996-12-25 1996-12-25 Compresseur a plateau incline a deplacement variable WO1998029658A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1996/003771 WO1998029658A1 (fr) 1996-12-25 1996-12-25 Compresseur a plateau incline a deplacement variable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1996/003771 WO1998029658A1 (fr) 1996-12-25 1996-12-25 Compresseur a plateau incline a deplacement variable

Publications (1)

Publication Number Publication Date
WO1998029658A1 true WO1998029658A1 (fr) 1998-07-09

Family

ID=14154267

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/003771 WO1998029658A1 (fr) 1996-12-25 1996-12-25 Compresseur a plateau incline a deplacement variable

Country Status (1)

Country Link
WO (1) WO1998029658A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194921U (fr) * 1981-06-05 1982-12-10
JPH06288347A (ja) * 1993-04-08 1994-10-11 Toyota Autom Loom Works Ltd 容量可変型斜板式圧縮機
JPH08177734A (ja) * 1994-12-28 1996-07-12 Toyota Autom Loom Works Ltd 圧縮機におけるピストン

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194921U (fr) * 1981-06-05 1982-12-10
JPH06288347A (ja) * 1993-04-08 1994-10-11 Toyota Autom Loom Works Ltd 容量可変型斜板式圧縮機
JPH08177734A (ja) * 1994-12-28 1996-07-12 Toyota Autom Loom Works Ltd 圧縮機におけるピストン

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