EP1906014A2 - Shoe for compressors - Google Patents

Shoe for compressors Download PDF

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Publication number
EP1906014A2
EP1906014A2 EP07115823A EP07115823A EP1906014A2 EP 1906014 A2 EP1906014 A2 EP 1906014A2 EP 07115823 A EP07115823 A EP 07115823A EP 07115823 A EP07115823 A EP 07115823A EP 1906014 A2 EP1906014 A2 EP 1906014A2
Authority
EP
European Patent Office
Prior art keywords
shoe
semi
base portion
sliding contact
spherical
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07115823A
Other languages
German (de)
English (en)
French (fr)
Inventor
Takayuki Kato
Takahiro Sugioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Industries Corp
Original Assignee
Toyota Industries Corp
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
Priority claimed from JP2006251008A external-priority patent/JP2008069747A/ja
Priority claimed from JP2006251012A external-priority patent/JP2008069748A/ja
Application filed by Toyota Industries Corp filed Critical Toyota Industries Corp
Publication of EP1906014A2 publication Critical patent/EP1906014A2/en
Withdrawn legal-status Critical Current

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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
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F04B27/0886—Piston shoes
    • 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
    • F04B27/0873—Component parts, e.g. sealings; Manufacturing or assembly thereof
    • F04B27/0878—Pistons
    • F04B27/0882—Pistons piston shoe retaining 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
    • 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
    • F04B27/1045—Cylinders
    • 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
    • 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
    • F04B27/1081—Casings, housings
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/14—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F05B2260/962—Preventing, counteracting or reducing vibration or noise by means creating "anti-noise"
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Definitions

  • the present invention relates to a shoe for compressors.
  • a pair of longitudinal shoes for compressors can be provided between the swash plate and the piston.
  • the respective shoes comprise a base portion and a semi-spherical portion made integral with the base portion.
  • the base portion includes a swash-plate sliding contact surface in sliding contact with the swash plate.
  • the semi-spherical portion includes a bearing-seat sliding contact surface in sliding contact with a bearing seat, which is provided concavely on the piston.
  • General shoes are semi-spherical in shape such that a base portion and a semi-spherical portion are solid and integral with each other.
  • such shoes are manufactured by subjecting a wire material of, for example, SUJ2 (JIS G4805) to cutting, press working, polishing, etc.
  • shoes made lightweight by forming a cavity between a base portion and a semi-spherical portion are known (for example, JP-A-2005-90385 , JP-A-2002-31051 , JP-A-2-119686 , JP-A-2002-39058 , JP-A-2001-263225 , JP-UM-A-6-40385 ) .
  • shoes of this kind for compressors, in which a swash plate can be changed in inclination, it is possible to decrease a reciprocating inertial force of a piston, thus enabling achieving an improvement in capacity controllability.
  • shoes of this kind can realize reduction in motive power for driving of a compressor, lightening of the compressor, etc.
  • a swash-plate sliding contact surface of a base portion of a shoe comes into sliding contact with a surface of a swash plate and a bearing-seat sliding contact surface of a semi-spherical portion of the shoe comes into sliding contact with a bearing surface of a piston. Therefore, a force acting in a direction, in which the base portion and the semi-spherical portion approach each other, acts much on the shoe.
  • the shoes disclosed in JP-A-2002-31051 , JP-A-2-119686 , JP-A-2002-39058 , JP-A-2001-263225 , or JP-UM-A-6-40385 described above are hard to sustain the force and there is a fear of deformation in a direction, in which the base portion and the semi-spherical portion approach each other, due to use over a long term.
  • gap is generated between the swash plate and the base portion of the shoe, or between the semi-spherical portion of the shoe and a bearing seat of the piston to lead to generation of abnormal noise and an obstacle to smooth operation.
  • the invention has been thought of in view of the conventional situation and has its object to provide a shoe for compressors, in which lightening and practical strength can be made compatible with each other.
  • the invention provides a shoe for compressors, comprising a base portion having a swash-plate sliding contact surface in sliding contact with a swash plate and a semi-spherical portion made integral with the base portion and having a bearing-seat sliding contact surface in sliding contact with a bearing seat, which is in the form of a spherical surface and provided concavely on a piston, and wherein a cavity is formed between the base portion and the semi-spherical portion, and the base portion and the semi-spherical portion are connected to each other by a solid connecting portion, which passes through centers of the both portions and extends in a central direction of the both portions.
  • Lightening of the shoe according to the invention is realized by the cavity formed between the base portion and the semi-spherical portion. Also, the shoe can ensure practical strength since the base portion and the semi-spherical portion are connected to each other by the solid connecting portion, which passes through centers of the both portions and extends in a central direction of the both portions, and the connecting portion sustains a force acting in a direction, in which the base portion and the semi-spherical portion are caused to approach each other.
  • the shoe according to the invention can make lightening and practical strength compatible with each other. Therefore, the shoe can perform effects of suppression of abnormal noise of a variable displacement type swash plate compressor, an improvement in durability, etc. in addition to effects of an improvement in capacity controllability of the compressor, reduction in motive power, lightening, etc.
  • solid means that no hole is formed centrally of a shaft cross section, and is opposed to “hollow”, which means that a hole is formed centrally of a shaft cross section.
  • an opening is formed between the base portion and the semi-spherical portion to communicate the cavity to an outside.
  • a lubricating oil in the compressor enters into the cavity through the opening and the lubricating oil is discharged outside from the opening at need, sliding contact between the swash-plate sliding contact surface of the base portion and a surface of the swash plate, and sliding contact between the bearing-seat sliding contact surface of the semi-spherical portion and a bearing seat of the piston are made smooth.
  • the capacity controllability of the compressor, an effect of reduction in motive power, etc. are improved.
  • the base portion and the semi-spherical portion may be made of the same material, or different materials.
  • materials of the base portion and the semi-spherical portion are different from each other, freedom in choosing materials for the swash plate and the piston is widened to enable realizing a further excellent compressor.
  • Materials of the base portion, the semi-spherical portion, and the connecting portion may be different from one another.
  • materials of the base portion, the semi-spherical portion, and the connecting portion, respectively, are different from one another, freedom in choosing materials for the swash plate and the piston is widened to enable realizing a further excellent compressor.
  • the shoe can be made practical in strength by forming the connecting portion from a highly stiff material.
  • the connecting portion can be defined by a rib provided upright on the semi-spherical portion on an opposite side of the bearing-seat sliding contact surface and a tip end of the rib can define the swash-plate sliding contact surface.
  • the rib sustains a force acting in a direction, in which the base portion and the semi-spherical portion are caused to approach each other, it is possible to ensure a practical strength.
  • the shoe can be manufactured by deforming a material with a pressing force in one direction, the shoe can suppress an increase in manufacturing cost of a compressor.
  • a lubricating oil in the compressor enters into the cavity between the ribs and the lubricating oil is discharged between the swash-plate sliding contact surface of the base portion and a surface of the swash plate at need, so that sliding contact there becomes smooth.
  • the connecting portion can be defined by a rib provided upright on the base portion on an opposite side of the swash-plate sliding contact surface and a tip end of the rib can define the bearing-seat sliding contact surface.
  • the semi-spherical portion can include a cap-shaped head portion and a rib provided upright on the head portion on an opposite side of the bearing-seat sliding contact surface.
  • the connecting portion can be defined by the rib.
  • the base portion can be made disk-shaped to fit with the semi-spherical portion while ensuring a cavity between itself and the semi-spherical portion. Lightening of the shoe between the base portion and the semi-spherical portion is realized by the cavity ensured between the ribs. Also, since the base portion is disk-shaped, it is possible to reduce a bearing pressure acting between the swash-plate sliding contact surface of the base portion and a surface of the swash plate.
  • the base portion can include a disk-shaped bottom portion and a rib provided upright on the bottom portion on an opposite side of the swash-plate sliding contact surface.
  • the connecting portion can be defined by the rib.
  • the semi-spherical portion can be made cap-shaped to fit with the base portion while ensuring a cavity between itself and the base portion.
  • Fig. 1 is a cross sectional view showing a compressor, in which shoes according to Embodiment 1 to Embodiment 10 are used.
  • Fig. 2 is a cross sectional view showing an essential part of the compressor of Embodiment 1.
  • Fig. 3 is a cross sectional view showing the shoe of Embodiment 1.
  • Fig. 4 relates to a method of manufacturing the shoe of Embodiment 1, Fig. 4 (A) being a cross sectional view showing a press die, etc. before hot forging, and Fig. 4(B) being a cross sectional view showing the press die, etc. after hot forging.
  • Fig. 5 is a cross sectional view showing a shoe of Embodiment 2.
  • Fig. 6 is a cross sectional view showing a shoe of Embodiment 3.
  • Fig. 7 is a disassembled, cross sectional view showing the shoe of Embodiment 3.
  • Fig. 8 is a cross sectional view showing a shoe of Embodiment 4.
  • Fig. 9 is a disassembled, cross sectional view showing the shoe of Embodiment 4.
  • Fig. 10 is a cross sectional view showing a shoe of Embodiment 5.
  • Fig. 11 is a disassembled, cross sectional view showing the shoe of Embodiment 5.
  • Fig. 12 is a cross sectional view showing a shoe of Embodiment 6.
  • Fig. 13 is a disassembled, cross sectional view showing the shoe of Embodiment 6.
  • Fig. 14 is a cross sectional view showing a shoe of Embodiment 7.
  • Fig. 15 is a perspective view showing the shoe of Embodiment 7.
  • Fig. 16 relates to a method of manufacturing the shoe of Embodiment 7, Fig. 16 (A) being a cross sectional view showing a press die, etc. before hot forging, and Fig. 16(B) being a cross sectional view showing the press die, etc. after hot forging.
  • Fig. 17 is a cross sectional view showing a shoe of Embodiment 8.
  • Fig. 18 is a perspective view showing the shoe of Embodiment 8.
  • Fig. 19 relates to a method of manufacturing the shoe of Embodiment 8 and is a cross sectional view showing a press die, etc. after hot forging.
  • Fig. 20 relates to a shoe of Embodiment 9, Fig. 20(A) being a disassembled, cross sectional view, and Fig. 20(B) being a cross sectional view.
  • Fig. 21 relates to a shoe of Embodiment 10, Fig. 21(A) being a disassembled, cross sectional view, and Fig. 21(B) being a cross sectional view.
  • Embodiment 1 to Embodiment 10 in which the invention is embodied, will be described with reference to the drawings.
  • a variable displacement type swash plate compressor With the compressor, a front housing 2 is joined to a front end of a cylinder block 1 and a rear housing 4 is joined to a rear end of the cylinder block 1 through a valve unit 3 as shown in Fig. 1. Axial holes 1a, 2a extending in an axial direction are provided through the cylinder block 1 and the front housing 2. A drive shaft 5 is supported rotatably by the axial holes 1a, 2a with bearing devices, etc. therebetween.
  • lower and upper sides in Fig. 1 are defined as front and rear sides.
  • a crank chamber 6 is defined in the front housing 2.
  • a lug plate 7 is fixed to the drive shaft 5 with a bearing device between itself and the front housing 2.
  • a swash plate 8 formed on an outer peripheral side thereof with longitudinal, flat surfaces 8a is provided rearwardly of the lug plate 7 in the crank chamber 6.
  • the swash plate 8 has the drive shaft 5 extending therethrough and is varied in angle of inclination in this state by a link mechanism 9 provided between itself and the lug plate 7.
  • a plurality of cylinder bores 1b extending in the axial direction are provided concentrically through the cylinder block 1.
  • One-head pistons 10 are accommodated in the respective cylinder bores 1b to be able to reciprocate therein.
  • Neck portions are provided on side of the respective pistons 10 toward the crank chamber 6 and bearing seats 10a in the form of a spherical surface are provided concavely on the neck portions of the respective pistons 10 to be opposed each other.
  • a pair of longitudinal shoes 21 are provided between the swash plate 8 and the respective pistons 10.
  • the respective shoes 21 comprise a disk-shaped base portion 211 and a semi-spherical portion 212 made integral with the base portion 211 and having a semi-spherical outer surface.
  • An outer surface of the base portion 211 makes a circular swash-plate sliding contact surface 211a in sliding contact with the swash plate 8.
  • a peripheral edge of the swash-plate sliding contact surface 211a is chamfered.
  • the outer surface of the semi-spherical portion 212 makes a spherical bearing-seat sliding contact surface 212a in sliding contact with the bearing seat 10a of the piston 10.
  • the rear housing 4 is formed with a suction chamber 4a and a discharge chamber 4b.
  • the cylinder bores 1b can be communicated to the suction chamber 4a through a suction valve mechanism of the valve unit 3 and communicated to the discharge chamber 4b through a discharge valve mechanism of the valve unit 3.
  • a capacity control valve 11 is accommodated in the rear housing 4.
  • the capacity control valve 11 is communicated to the suction chamber 4a via a detection passage 4c and causes an intake passage 4d to provide communication or discommunication between the discharge chamber 4b and the crank chamber 6.
  • the capacity control valve 11 detects pressure in the suction chamber 4a to change an opening degree of the intake passage 4d to change a discharge capacity of the compressor.
  • an extraction passage 4e provides communication between the crank chamber 6 and the suction chamber 4a.
  • a condenser 13, an expansion valve 14, and an evaporator 15 are connected to the discharge chamber 4b through a piping 12, in order.
  • the evaporator 15 is connected to the suction chamber 4a through the piping 12.
  • a pulley 16 is provided rotatably at a front end of the front housing 2 with a bearing device therebetween, the pulley 16 being fixed to the drive shaft 5.
  • a belt 18 rotationally driven by an engine 17 is wound round the pulley 16.
  • cavity 213 is formed between the base portion 211 and the semi-spherical portion 212 of the shoe 21. Also, the base portion 211 and the semi-spherical portion 212 are connected to each other by a solid connecting portion 214, which passes centers of the portions and extends in a center direction of the portions.
  • the respective shoes 21 are manufactured in the following manufacturing method.
  • a solid material W composed of, for example, an iron material SUJ2 (JIS G4805) is prepared in a material forming process.
  • the material W includes a disk-shaped bottom portion W1, a disk-shaped umbrella portion W2 being coaxial with the bottom portion W1 and having a slightly smaller diameter than that of the bottom portion W1, and a shaft portion W3 extending in a central direction of the bottom portion W1 and the umbrella portion W2 to connect between the bottom portion W1 and the umbrella portion W2.
  • the material W may be formed by casting, or formed by press working, or cutting.
  • a press die P composed of an upper die P1 and a lower die P2 is prepared in the process of press working.
  • the upper die P1 is formed with a semi-spherically concave forming surface P11, which matches with the bearing-seat sliding contact surface 212a of the shoe 21.
  • the lower die P2 is formed with a forming surface P21, which matches with the swash-plate sliding contact surface 211a of the shoe 21.
  • a cavity C is defined by the forming surface P11 and the forming surface P21.
  • the material W is subjected to hot forging with the use of the press die P. Thereby, the bottom portion W1 of the material W makes the base portion 211, the umbrella portion W2 makes the semi-spherical portion 212 and the shaft portion W3 makes the connecting portion 214.
  • the shoe 21 according to Embodiment 1 is obtained.
  • the manufacturing method it is possible to readily manufacture the shoe 21, of which the base portion 211 and the semi-spherical portion 212 are made of the same material.
  • hot forging is also possible in multi-stage.
  • the shoe 21 can be also formed by subjecting a product after press working to surface polishing at need, or to tinning, surface coating such as DLC (Diamond Like Carbon), etc.
  • the drive shaft 5 rotates whereby the swash plate 8 rotates synchronously and the pistons 10 reciprocate in the cylinder bores 1b through the shoes 21.
  • compression spaces formed on head sides of the pistons 10 are varied in volume. Therefore, refrigerant gas in the suction chamber 4a is sucked into the compression spaces to be compressed and then discharged into the discharge chamber 4b.
  • a refrigerating action is performed in a refrigerating circuit composed of the compressor, the condenser 13, the expansion valve 14, and the evaporator 15.
  • the shoe 21 brings the swash-plate sliding contact surface 211a of the base portion 211 into sliding contact with the flat surface 8a of the swash plate 8 and brings the bearing-seat sliding contact surface 212a of the semi-spherical portion 212 into sliding contact with the bearing seat 10a of the piston 10.
  • the cavity 213 realizes lightening of the shoe 21, it is possible to decrease a reciprocating inertial force of the piston 10, thus enabling improving the compressor in capacity controllability. Also, the shoes 21 can realize reduction in motive power, by which the compressor is driven, lightening of the compressor, etc.
  • the shoes 21 demonstrate a practical strength since the base portion 211 and the semi-spherical portion 212 are connected to each other by the solid connecting portion 214 and the connecting portion 214 sustains a force acting in a direction, in which the base portion 211 and the semi-spherical portion 212 approach each other.
  • the shoes 21 enables making lightening and the practical strength compatible with each other, the shoes 21 make it possible to perform effects of suppression of abnormal noise of a variable displacement type swash plate compressor, an improvement in durability, etc. in addition to effects of an improvement in capacity controllability of the compressor, reduction in motive power, lightening of the compressor, etc.
  • the manufacturing method it is possible in the manufacturing method to perform a welding process of welding the base portion 211 and the semi-spherical portion 212.
  • the base portion 211 and the semi-spherical portion 212 can be joined together firmly to appropriately bear a compressive reaction force, etc. in other regions than the connecting portion 214.
  • opening 215 is formed on a shoe 22 of Embodiment 2 between a base portion 211 and a semi-spherical portion 212.
  • the opening 215 is formed annularly round the base portion 211.
  • the opening 215 communicates cavity 213 to an outside.
  • the remaining construction is the same as that of the shoe 21 of Embodiment 1.
  • the shoe 22 is used in the same compressor as that of Embodiment 1.
  • the shoe 22 is obtained by regulating the volume of the material W or the volume of the cavity C in the press die P in the manufacturing method of Embodiment 1.
  • a lubricating oil enters into the cavity 213 through the opening 215 and the lubricating oil is discharged outside from the opening 215 at need. Therefore, sliding contact between a swash-plate sliding contact surface 211a of the base portion 211 and a surface 8a of a swash plate 8, and sliding contact between a bearing-seat sliding contact surface 212a of the semi-spherical portion 212 and a bearing seat 10a of a piston 10 are made smooth. Thereby, the capacity controllability of the compressor, an effect of reduction in motive power, etc. are improved.
  • the opening 215 may be plural and formed in appropriate number by partially connecting the base portion 211 and the semi-spherical portion 212 to each other.
  • the shoes 21, 22 use SUJ2 as a material therefor in Embodiment 1 and Embodiment 2, aluminum alloys such as Al-Si alloy, etc. may be used as a material of the shoes.
  • a material of a connecting portion 214 is different from a material of a base portion 211 and a semi-spherical portion 212.
  • the remaining construction is the same as that of the shoe 21 of Embodiment 1.
  • the shoe 23 is also used in the same compressor as that of Embodiment 1.
  • the shoe 23 is manufactured by the following manufacturing method.
  • a hollow body W4 made of an aluminum alloy is prepared in a manufacturing process of the hollow body.
  • the hollow body W4 is semi-spherical in external shape and includes a cavity 213 therein.
  • An insertion port 216 is formed at a top of the hollow body W4 to communicate the cavity 213 to an outside.
  • a solid shaft portion W5 made of SUJ2 described above is press fitted into the insertion port 216.
  • the hollow body W4 provides a base portion 211 and a semi-spherical portion 212 of the shoe 23 and the shaft portion W5 provides a connecting portion 214 of the shoe 23.
  • the shoe 23 of Embodiment 3 is obtained.
  • the shoe 23 can be made practical in strength by forming the connecting portion 214 from a highly stiff material.
  • the shaft portion W5 may be produced from an aluminum alloy.
  • the shoe can be made high in strength by using the hollow body W4 intact as a shoe.
  • a material of a semi-spherical portion 212 and a connecting portion 214 is different from that of a base portion 211.
  • the remaining construction is the same as that of the shoe 21 of Embodiment 1.
  • the shoe 24 is also used in the same compressor as that of Embodiment 1.
  • the shoe 24 is manufactured according to the following manufacturing method.
  • a first member W6 made of SUJ2 is prepared in a first-member manufacturing process.
  • the first member W6 includes a cap-shaped head portion W7 and a solid shaft portion W8 extending inside from a top of the head portion W7.
  • a second disk-shaped member W9 made of an aluminum alloy is prepared in a second-member manufacturing process.
  • a recess 217, into which a shaft portion W8 can be press fitted, is provided concavely on a center of the second member W9.
  • a tip end of the shaft portion W8 of the first member W6 is press fitted into the recess 217 of the second member W9.
  • the head portion W7 of the first member W6 makes the semi-spherical portion 212 of the shoe
  • the shaft portion W8 of the first member W6 makes the connecting portion 214 of the shoe
  • the second member W9 makes the base portion 211 of the shoe 24.
  • a material of a semi-spherical portion 212 is different from a material of a base portion 211 and a connecting portion 214.
  • the remaining construction is the same as that of the shoe 21 of Embodiment 1.
  • the shoe 25 is also used in the same compressor as that of Embodiment 1.
  • the shoe 25 is manufactured according to the following manufacturing method.
  • a first cap-shaped member W10 made of SUJ2 is prepared in a first-member manufacturing process.
  • a second member W11 made of SUJ2 is likewise prepared in a second-member manufacturing process.
  • the second member W11 includes a disk-shaped bottom portion W12 and a solid shaft portion W13 extending vertically from a center of the bottom portion W12.
  • a tip end of the shaft portion W13 is joined to a center of the first member W10 by means of friction welding or the like.
  • the first member W10 makes a semi-spherical portion 212 of the shoe 25
  • the bottom portion W12 of the second member W11 makes a base portion 211 of the shoe 25
  • the shaft portion W13 of the second member W11 makes a connecting portion 214 of the shoe 25.
  • a material of a semi-spherical portion 212, a material of a base portion 211, and a material of a connecting portion 214 are different from one another.
  • the remaining construction is the same as that of the shoe 21 of Embodiment 1.
  • the shoe 26 is also used in the same compressor as that of Embodiment 1.
  • the shoe 26 is manufactured according to the following manufacturing method.
  • a first cap-shaped member W14 made of an aluminum alloy is prepared in a first-member manufacturing process.
  • a second disk-shaped member W15 made of a different aluminum alloy from that of the first member W14 is prepared in a second-member manufacturing process.
  • a solid shaft portion W16 made of SUJ2 is prepared in a shaft-portion manufacturing process.
  • one end of the shaft portion W16 is joined to a top of the first member W14 and the other end of the shaft portion W16 is joined to a center of the second member W15.
  • the first member W14 makes the semi-spherical portion 212 of the shoe 26
  • the second member W15 makes the base portion 211 of the shoe 26
  • the shaft portion W16 makes the connecting portion 214 of the shoe 26.
  • the shoe 26 materials of the base portion 211, the semi-spherical portion 212, and the connecting portion 214 are different from one another, so that freedom in choosing materials for a swash plate 8 and a piston 10 is widened to enable realizing a further excellent compressor. Also, by forming the connecting portion 214 from a highly stiff material, the shoe 26 can be made practical in strength.
  • a shoe 31 comprises ribs 314 provided upright on a semi-spherical portion 312, an external surface of which is semi-spherical, on an opposite side of a bearing-seat sliding contact surface 312a.
  • a base portion 311 is constituted by a peripheral edge of the semi-spherical portion 312 and tip ends of the ribs 314.
  • the ribs 314 are formed to be cross-shaped to be equiangular at intervals of 90 degrees radially about centers of the base portion 311 and the semi-spherical portion 312.
  • a solid connecting portion 314a is formed centrally of the ribs 314.
  • a swash-plate sliding contact surface 311a of the base portion 311 is defined by the ribs 314 and cavities 313 are provided between the ribs 314 provided upright on the semi-spherical portion 312.
  • the shoe 31 is also used in the same compressor as that of Embodiment 1.
  • the respective shoes 31 are manufactured according to the following manufacturing method.
  • a solid material W17 made of, for example, an iron material SUJ2 (JIS G4805) is prepared in a material forming process by press working or casting.
  • the material W17 is substantially semi-spherical.
  • a press die P3 composed of an upper die P4 and a lower die P5 is prepared in the process of press working.
  • the upper die P4 is formed with projections P41, which are used to form the ribs 314 on the shoe 31 and to form the cavities 313 between the ribs 314. Bottoms of the projections P41 define a forming surface P42, which matches with the swash-plate sliding contact surface 311a.
  • the lower die P5 is formed with a forming surface P51, which matches with the bearing-seat sliding contact surface 312a of the shoe 31.
  • a clearance C1 is defined by the forming surfaces P42, P51.
  • the material W17 is subjected to hot forging with the use of the press die P3. Thereby, the material W17 is deformed by pressing forces in a vertical direction to provide the shoe 31 of Embodiment 7.
  • the manufacturing method it is possible to readily manufacture the shoe 31, of which the base portion 311 and the semi-spherical portion 312 are made of the same material.
  • hot forging is also possible in multi-stage.
  • the shoe 31 can be also formed by subjecting a product after press working to surface polishing at need, or to tinning, surface coating such as DLC (Diamond Like Carbon), etc.
  • the cavities 313 are provided between the ribs 314 on the back side of the semi-spherical portion 312, lightening of the shoe 31 can be realized. Therefore, it is possible to decrease a reciprocating inertial force of the piston 10, thus enabling improving the compressor in capacity controllability. Also, the shoes 31 can realize reduction in motive power, by which the compressor is driven, lightening of the compressor, etc.
  • the ribs 314 of the shoe 31 sustains a force acting in a direction, in which the base portion 311 and the semi-spherical portion 312 are caused to approach each other.
  • the connecting portion 314a of the ribs 314 surely sustains the force. Therefore, the practical strength surely demonstrates itself even when a large force in a direction, in which the base portion 311 and the semi-spherical portion 312 in the compressor are caused to approach each other, acts much.
  • the shoes 31 enable making lightening and the practical strength compatible with each other and can be readily manufactured. Therefore, the shoes 31 make it possible to perform effects of suppression of abnormal noise of a variable displacement type swash plate compressor, an improvement in durability, etc. in addition to effects of an improvement in capacity controllability of the compressor, reduction in motive power, lightening of the compressor, etc. and to suppress an increase in manufacturing cost of the compressor.
  • a lubricating oil in the compressor enters into the cavities 313 between the ribs 314 and the lubricating oil is discharged between the swash-plate sliding contact surface 311a of the base portion 311 and the surface 8a of the swash plate 8 at need, so that sliding contact there becomes smooth.
  • a shoe 32 of Embodiment 8 comprises ribs 315 provided upright on a disk-shaped base portion 311 on an opposite side of a swash-plate sliding contact surface 311a. Tip ends of the ribs 315 define a semi-spherical portion 312. As shown in Fig. 18, the ribs 315 are formed to be cross-shaped to be equiangular at intervals of 90 degrees radially about centers of the base portion 311 and the semi-spherical portion 312. A solid connecting portion 315a is formed centrally of the ribs 315.
  • the bearing-seat sliding contact surface 312a of the semi-spherical portion 312 is defined by the ribs 315 and cavities 313 are provided between the ribs 315 provided upright on the base portion 311.
  • the remaining construction is the same as that of the shoe 31 of Embodiment 7.
  • the shoe 32 is also used in the same compressor as that of Embodiment 1.
  • the respective shoes 32 are manufactured according to the following manufacturing method.
  • a disk-shaped, solid material W18 made of SUJ2 is prepared in a material forming process by press working or casting.
  • a press die P6 composed of an upper die P7 and a lower die P8 is prepared in the process of press working.
  • the upper die P7 is formed with a forming surface P71, which matches with the swash-plate sliding contact surface 311a of the shoe 32.
  • the lower die P8 is formed with projections P81, which are used to form the ribs 315 on the shoe 32 and to form the cavities 313 between the ribs 315. Bottoms of the projections P81 define a forming surface P82, which matches with the bearing-seat sliding contact surface 312a.
  • a clearance C2 is defined by the forming surfaces P71, P82.
  • the press die P6 is used to subject the material W18 to hot forging whereby the material W18 is deformed by pressing forces in a vertical direction to provide the shoe 32 of Embodiment 8.
  • the manufacturing method also performs the same actions and effects as those of the manufacturing method in Embodiment 7.
  • materials in Embodiment 7 and Embodiment 8 are not limited to SUJ2 but an aluminum alloy like Al-Si alloy may be used as the material.
  • a shoe 33 of Embodiment 9 comprises a semi-spherical portion 316 and a base portion 317.
  • the semi-spherical portion 316 includes a cap-shaped head portion 316a having a bearing-seat sliding contact surface 316c and ribs 316b provided upright on the head portion 316a on an opposite side of the bearing-seat sliding contact surface 316c.
  • the ribs 316b are formed to be cross-shaped to be equiangular at intervals of 90 degrees radially about a center of the semi-spherical portion 316.
  • a solid connecting portion 316d is formed centrally of the ribs 316b.
  • the base portion 317 is disk-shaped to include a swash-plate sliding contact surface 317b. Projections 317a being fitted into tip ends of the ribs 316b are protrusively provided on an upper surface of the base portion 317.
  • the semi-spherical portion 316 and the base portion 317 can be manufactured by press working or casting or the like. As shown in Fig. 20(B), in a process of fitting, the base portion 317 is fitted into the semi-spherical portion 316 while ensuring cavities 313 between itself and the semi-spherical portion 316. Thus the shoe 33 of Embodiment 9 is obtained.
  • a material of the semi-spherical portion 316 is SUJ2 and different from a material of the base portion 317, which comprises an aluminum alloy.
  • the remaining construction is the same as that of the shoe 31 of Embodiment 7.
  • the shoe 33 is also used in the same compressor as that of Embodiment 1.
  • a lubricating oil in the compressor enters into the cavities 313 through the openings and the lubricating oil is discharged outside from the openings at need, so that sliding contact between the swash-plate sliding contact surface 317b of the base portion 317 and the surface 8a of the swash plate 8 and between the bearing-seat sliding contact surface 316c of the semi-spherical portion 316 and a bearing seat 10a of a piston 10 are made smooth.
  • the remaining actions and effects are the same as those in Embodiment 7.
  • the manufacturing method it is possible to perform a welding process of welding the base portion 317 and the semi-spherical portion 316 together.
  • the base portion 317 and the semi-spherical portion 316 can be joined together firmly to appropriately bear a compressive reaction force, etc.
  • a shoe 34 of Embodiment 10 comprises a base portion 319 and a semi-spherical portion 318.
  • the base portion 319 is disk-shaped to include a bottom portion 319a having a swash-plate sliding contact surface 319c and ribs 319b provided upright on the bottom portion 319a on an opposite side of the bearing-seat sliding contact surface 319c.
  • the ribs 319b are formed to be cross-shaped to be equiangular at intervals of 90 degrees radially about a center of the base portion 319.
  • a solid connecting portion 319d is formed centrally of the ribs 319b.
  • the semi-spherical portion 318 is cap-shaped to have a bearing-seat sliding contact surface 318b. Projections 318a being fitted into tip ends of the ribs 319b are protrusively provided on an inner surface of the semi-spherical portion 318.
  • the base portion 319 and the semi-spherical portion 318 can be manufactured by press working or casting or the like. As shown in Fig. 21(B), in a process of fitting, the semi-spherical portion 318 is fitted onto the base portion 319 while ensuring cavities 313 between itself and the base portion 319. Thus the shoe 34 of Embodiment 10 is obtained.
  • a material of the base portion 319 is an aluminum alloy and different from a material of the semi-spherical portion 318, which comprises SUJ2.
  • the remaining construction is the same as that of the shoe 31 of Embodiment 7.
  • the shoe 34 is also used in the same compressor as that of Embodiment 1.
  • the shoe 34 also performs the same actions and effects as those in Embodiment 7.
  • the base portions 317, 319 of the shoes 33, 34 are made of an aluminum alloy and the semi-spherical portions 316, 318 are made of SUJ2 in Embodiment 9 and Embodiment 10, the base portions and the semi-spherical portions may be made of reverse materials to those in the former, or the both may be made of SUJ2 or an aluminum alloy.
  • the shoe, according to the invention including a base portion, a semi-spherical portion, and a connecting portion can be manufactured by the following first to fifth manufacturing methods.
  • the first manufacturing method comprises a material forming process of obtaining a solid material and a press working process of using a press die to subject the material to press working to obtain a shoe.
  • the shoe thus obtained includes a cavity formed between a base portion and a semi-spherical portion.
  • the base portion and the semi-spherical portion are connected to each other by a solid connecting portion, which passes centers of the base portion and the semi-spherical portion and extends in a central direction of the base portion and the semi-spherical portion.
  • the material is deformed to make the shoe.
  • the manufacturing method it is possible to readily manufacture the shoe, of which the base portion and the semi-spherical portion are made of the same material.
  • an integral material, one end side and the other end side of which are made of different materials, is used in the first manufacturing method, it is possible to manufacture a shoe, of which a base portion and a semi-spherical portion are made of different materials. It is possible to adopt hot forging as press working.
  • an opening can be formed between the base portion and the semi-spherical portion by adjusting a volume of a material and a volume of the cavity in press working.
  • the material forming process can comprise a process of forming a disk-shaped bottom portion, a disk-shaped umbrella portion, and a shaft portion, which connects between the bottom portion and the umbrella portion.
  • the process of press working uses a press die composed of an upper die and a lower die and subjects the umbrella portion to press working with the upper die while supporting the bottom portion on the lower die, whereby the bottom portion can make the base portion, the umbrella portion can make the umbrella portion, and the shaft portion can make the connecting portion.
  • the second manufacturing method comprises a hollow-body manufacturing process of obtaining a hollow body, which is semi-spherical in external shape and includes a cavity therein and is formed an insertion port to communicate the cavity to an outside at the top thereof, and an assembling process, in which the solid connecting portion is inserted into the insertion port such that the hollow body provides a base portion and a semi-spherical portion and the shaft portion provides a connecting portion, whereby a shoe is obtained.
  • the shoe thus obtained includes the cavity formed between the base portion and the semi-spherical portion.
  • the base portion and the semi-spherical portion are connected to each other by the connecting portion, which passes centers of the base portion and the semi-spherical portion and extends in a central direction of the base portion and the semi-spherical portion.
  • the hollow body provides the base portion and the semi-spherical portion of the shoe and the shaft portion provides the connecting portion of the shoe.
  • the second manufacturing method it is possible to make a material of the shaft portion different from that of the hollow body.
  • the shoe can be made further practical in strength by forming the connecting portion from a highly stiff material.
  • the third manufacturing method comprises a first-member manufacturing process of obtaining a cap-shaped head portion and a solid shaft portion extending inside from a top of the head portion, a second-member, manufacturing process of obtaining a second disk-shaped member, and an assembling process, in which a tip end of the shaft portion is joined to a center of the second member such that the second member provides a base portion, the head portion provides a semi-spherical portion and the shaft portion provides the connecting portion, whereby a shoe is obtained.
  • the shoe thus obtained includes a cavity formed between the base portion and the semi-spherical portion.
  • the base portion and the semi-spherical portion are connected to each other by the connecting portion, which passes centers of the base portion and the semi-spherical portion and extends in a central direction of the base portion and the semi-spherical portion.
  • the head portion of the first member provides the semi-spherical portion of the shoe
  • the shaft portion of the first member provides the connecting portion of the shoe
  • the second member provides the base portion of the shoe.
  • the fourth manufacturing method comprises a first-member manufacturing process of obtaining a first cap-shaped member, a second-member manufacturing process of obtaining a second member composed of a disk-shaped bottom portion and a solid shaft portion extending from a center of the bottom portion, and an assembling process, in which a tip end of the shaft portion is joined to a center of the first member such that the bottom portion provides a base portion, the first member provides a semi-spherical portion and the shaft portion provides the connecting portion, whereby a shoe is obtained.
  • the shoe thus obtained includes a cavity formed between the base portion and the semi-spherical portion.
  • the base portion and the semi-spherical portion are connected to each other by the connecting portion, which passes centers of the base portion and the semi-spherical portion and extends in a central direction of the base portion and the semi-spherical portion.
  • the first member provides the semi-spherical portion of the shoe
  • the bottom portion of the second member provides the base portion of the shoe
  • the shaft portion of the second member provides the connecting portion of the shoe.
  • the fifth manufacturing method comprises a first-member manufacturing process of obtaining a first cap-shaped member, a second-member manufacturing process of obtaining a second disk-shaped member, a shaft-portion manufacturing process of obtaining a solid shaft portion, and an assembling process, in which one end of the shaft portion is joined to a top of the first member and the other end of the shaft portion is joined to a center of the second member such that the second member provides the base portion, the first member provides the semi-spherical portion and the shaft portion provides the connecting portion, whereby a shoe is obtained.
  • the shoe thus obtained includes a cavity formed between the base portion and the semi-spherical portion.
  • the base portion and the semi-spherical portion are connected to each other by the connecting portion, which passes centers of the base portion and the semi-spherical portion and extends in a central direction of the base portion and the semi-spherical portion.
  • the first member provides the semi-spherical portion of the shoe
  • the second member provides the base portion of the shoe
  • the shaft portion provides the connecting portion of the shoe. According to the manufacturing method, it is possible to readily manufacture a shoe, of which a semi-spherical portion, a base portion, and a connecting portion are made of different materials.
  • the first to fifth manufacturing methods comprise a welding process of welding the base portion and the semi-spherical portion together.
  • the base portion and the semi-spherical portion can be joined together firmly to appropriately bear a compressive reaction force, etc. in other regions than the connecting portion.
  • the shoe of the invention in which a swash-plate sliding contact surface is defined by ribs, can be manufactured by the following sixth manufacturing method.
  • the sixth manufacturing method comprises a material forming process of obtaining a solid material and a press working process of using a press die to subject the material to press working to obtain a shoe.
  • the shoe thus obtained includes a swash-plate sliding contact surface defined by ribs provided upright on a semi-spherical portion on an opposite side of a bearing-seat sliding contact surface.
  • a material is deformed by pressing forces in one direction to provide the shoe.
  • the manufacturing method it is possible to readily manufacture the shoe, of which the swash-plate sliding contact surface and the semi-spherical portion are made of the same material.
  • an integral material, one end side and the other end side of which are made of different materials, is used in the sixth manufacturing method, it is also possible to manufacture a shoe, of which the swash-plate sliding contact surface and a semi-spherical portion are made of different materials. It is possible to adopt hot forging as press working.
  • the material forming process can comprise a process of forming a solid, semi-spherical material by means of press working or casting.
  • a press die composed of an upper die and a lower die is used to support a material on the lower die, which matches a bearing-seat sliding contact surface, and to subject the material to press working with the upper die, which matches the ribs and the swash-plate sliding contact surface.
  • the shoe of the invention in which a bearing-seat sliding contact surface is defined by ribs, can be manufactured by the following seventh manufacturing method.
  • the seventh manufacturing method comprises a material forming process of obtaining a solid material and a press working process of using a press die to subject the material to press working to obtain a shoe.
  • the shoe thus obtained includes a bearing-seat sliding contact surface defined by ribs provided upright on a base portion on an opposite side of a swash-plate sliding contact surface.
  • the seventh manufacturing method also performs the same actions and effects as those in the sixth manufacturing method.
  • the material forming process can comprise a process of forming a solid, disk-shaped material by means of press working or casting.
  • a press die composed of an upper die and a lower die is used to support a material on the lower die, which matches ribs and a bearing-seat sliding contact surface, and to subject the material to press working with the upper die, which matches the swash-plate sliding contact surface.
  • the ribs are not limited to a cross shape, in which four ribs are provided radially, but can be formed so that plural, that is, three or more ribs are provided radially.
  • Compressors in which the shoes according to Embodiment 1 to Embodiment 10 are used, are not limited to the variable displacement type swash plate compressors described above but may comprise a fixed displacement type swash plate compressor.
  • Refrigerant gas need not be R134a but may be carbon dioxide.
  • a shoe for compressors in which lightening and practical strength can be made compatible with each other, is provided.
  • a shoe 21 for compressors comprises a base portion 211 having a swash-plate sliding contact surface 211a in sliding contact with a swash plate 8 and a semi-spherical portion 212 made integral with the base portion 211 and having a bearing-seat sliding contact surface 212a in sliding contact with a bearing seat 10a, which is in the form of a spherical surface and provided concavely on a piston 10.
  • a cavity 213 is formed between the base portion 211 and the semi-spherical portion 212.
  • the base portion 211 and the semi-spherical portion 212 are connected to each other by a solid connecting portion 214, which passes through centers of the both portions and extends in a central direction of the both portions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP07115823A 2006-09-15 2007-09-06 Shoe for compressors Withdrawn EP1906014A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006251008A JP2008069747A (ja) 2006-09-15 2006-09-15 圧縮機用シュー及びその製造方法
JP2006251012A JP2008069748A (ja) 2006-09-15 2006-09-15 圧縮機用シュー及びその製造方法

Publications (1)

Publication Number Publication Date
EP1906014A2 true EP1906014A2 (en) 2008-04-02

Family

ID=38736021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07115823A Withdrawn EP1906014A2 (en) 2006-09-15 2007-09-06 Shoe for compressors

Country Status (4)

Country Link
US (1) US20090151552A1 (ko)
EP (1) EP1906014A2 (ko)
KR (1) KR20080025347A (ko)
BR (1) BRPI0703911A (ko)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6937100B2 (ja) 2016-09-30 2021-09-22 大豊工業株式会社 コンプレッサ用シュー

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3627652A1 (de) * 1985-08-16 1987-03-05 Toyoda Automatic Loom Works Gleitschuh fuer einen taumelscheibenkompressor
US7313997B2 (en) * 2006-05-26 2008-01-01 Visteon Global Technologies, Inc. Copper alloy piston shoe

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KR20080025347A (ko) 2008-03-20
BRPI0703911A (pt) 2008-04-29
US20090151552A1 (en) 2009-06-18

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