JP2008069747A - Shoe for compressor and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shoe for a compressor capable of realizing both weight reduction and practical strength. <P>SOLUTION: The shoe 21 for a compressor comprises a base 211 having a swash plate slide contact surface 211a coming into slide contact with a swash plate 8, and a hemispherical part 212 integrated with the base 211 and including, in a piston 10, a receiving seat slide contact surface 212a coming into slide contact with a receiving seat 10a recessed in a spherical surface. A cavity 213 is formed between the base 211 and hemispherical part 212, which are coupled to each other by a solid column part 214 extending in the mutual center direction. An opening 215 for connecting the cavity 213 to the outside is formed between the base 211 and hemispherical part 212. Materials of the base 211 and hemispherical part 212 can be made different. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a compressor shoe and a manufacturing method thereof.

  In a compressor including a swash plate and a piston, a pair of front and rear compressor shoes may be provided between the swash plate and the piston. Each shoe has a base and a hemispherical part integrated with the base. The base has a swash plate sliding contact surface that is in sliding contact with the swash plate. The hemispherical portion has a seat sliding contact surface that is in sliding contact with a receiving seat recessed in a spherical shape on the piston.

  In the compressor configured as described above, the swash plate rotates synchronously as the drive shaft rotates, and the piston reciprocates in the cylinder bore via the shoe. Thereby, the suction, compression, and discharge strokes of the refrigerant gas are performed on the piston head side. During this time, the swash plate sliding contact surface of the base portion is in sliding contact with the surface of the swash plate, and the receiving seat sliding contact surface of the hemispherical portion is in sliding contact with the receiving seat of the piston.

  A general shoe is a hemispherical shape in which a base portion and a hemispherical portion are solid and integrated. Such a shoe is generally manufactured by cutting, pressing, polishing, or the like on a wire made of SUJ2 (JIS G4805), for example.

  On the other hand, shoes that have been reduced in weight by forming a cavity between the base and the hemisphere are also known (for example, Patent Documents 1 to 6). If this shoe is used in a compressor that can change the inclination angle of the swash plate, the reciprocating inertia force of the piston can be reduced, and the capacity controllability can be improved. In addition, this shoe can realize reduction of power for driving the compressor, weight reduction of the compressor, and the like.

JP 2005-90385 A JP 2002-31051 A JP-A-2-119686 JP 2002-39058 A JP 2001-263225 A Japanese Utility Model Publication No. 6-40385

  However, although all of the above-described conventionally known shoes are lightened by the cavities, there is a concern about practical strength.

  That is, as described above, the shoe is in contact with the surface of the swash plate while the compressor is performing the suction, compression, and discharge strokes of the refrigerant gas, and the seat of the hemisphere portion. The sliding surface comes into sliding contact with the receiving seat of the piston. For this reason, a force in a direction in which the base portion and the hemispherical portion are brought close to each other acts on the shoe.

  The shoes disclosed in Patent Documents 2 to 6 are difficult to support this force, and may be displaced in a direction in which the base portion and the hemispherical portion approach each other due to long-term use. In this case, rattling occurs between the swash plate and the base of the shoe or between the hemispherical portion of the shoe and the seat of the piston, resulting in abnormal noise and hindering smooth operation. .

  In this regard, the shoe disclosed in Patent Document 1 is considered to be improved as compared with other shoes because the base portion and the hemispherical portion are connected by a hollow support portion extending in the center direction of each other. However, even in this shoe, since the support portion is hollow, it is still impossible to wipe out practically insufficient strength.

  The present invention has been made in view of the above-described conventional situation, and an object to be solved is to provide a compressor shoe capable of achieving both weight reduction and practical strength.

According to a first aspect of the present invention, there is provided a compressor shoe comprising: a base having a swash plate sliding contact surface that is in sliding contact with a swash plate; and a receiving seat sliding contact surface that is integral with the base portion and that is in sliding contact with a receiving seat that is recessed in a spherical shape on the piston. In a shoe for a compressor having a hemisphere with
A cavity is formed between the base portion and the hemispherical portion, and the base portion and the hemispherical portion are connected by a solid support portion extending in the center direction of each other.

  In the shoe of the first invention, weight reduction is realized by a cavity formed between the base portion and the hemispherical portion. In addition, this shoe is connected to the base and the hemisphere by a solid support extending in the center direction, and the support supports a force in a direction in which the base and the hemisphere are brought close to each other. Strength can be secured.

  Therefore, the shoe of the first invention can achieve both weight reduction and practical strength. For this reason, according to this shoe, in addition to the effects of improving the capacity controllability, power reduction, weight reduction, etc. of the variable capacity swash plate compressor, the effects of suppressing noise from the compressor and improving the durability are realized. It becomes possible to do.

  In the first invention, the term “solid” means that there is no hole in the center of the axial section, and it means that the hole has a hole in the center of the axial section. Solid is also called solid.

  It is preferable that an opening for communicating the cavity with the outside is formed between the base and the hemisphere. In this case, the lubricating oil in the compressor enters the cavity through the opening, and the lubricating oil is discharged from the opening to the outside as needed. Therefore, the swash plate sliding surface of the base and the surface of the swash plate And the sliding contact between the receiving seat sliding contact surface of the hemisphere and the receiving seat of the piston become smooth. This improves the capacity controllability of the compressor, the power reduction effect, and the like.

  The base and hemisphere may be made of the same material or different materials. The base part and the hemispherical part are preferably made of different materials. If the material of the base part and the hemispherical part are different, the choice of the material of the swash plate and the piston spreads, and it becomes possible to realize a more excellent compressor.

  The shoe of the first invention can be manufactured by the following method for manufacturing a shoe for a compressor of the second to sixth inventions.

The manufacturing method of the second invention has a base portion having a swash plate sliding contact surface that is in sliding contact with the swash plate, and a receiving seat sliding contact surface that is integral with the base portion and that is in sliding contact with a receiving seat that is formed in a spherical shape on the piston. In a manufacturing method of a shoe for a compressor having a hemispherical part,
A material formation process to obtain a solid material;
By pressing the material using a press die, a cavity is formed between the base and the hemisphere, and the base and the hemisphere are connected by a solid support extending in the center direction of each other. And a pressing step for obtaining the shoe.

  In the manufacturing method of the second invention, the material is deformed to become a shoe. According to this manufacturing method, it is possible to easily manufacture a shoe in which the base portion and the hemispherical portion are made of the same material. However, in the manufacturing method of the second invention, it is possible to manufacture a shoe made of a material whose base and hemisphere are different from each other by using an integral material made of different materials at the one end side and the other end side. Hot forging can be employed as the press molding.

In the manufacturing method of the second invention, it is possible to form an opening between the base and the hemisphere by adjusting the volume of the material and the volume of the cavity in press molding.

  The material forming step may include a step of forming a disk-shaped bottom portion, a disk-shaped umbrella portion, and a shaft portion that connects the bottom portion and the umbrella portion. In this case, the pressing step uses a press die composed of an upper die and a lower die, and presses the umbrella portion with the upper die while supporting the bottom portion with the lower die, thereby forming a base portion at the bottom portion and a hemisphere at the umbrella portion. The support portion can be configured by the shaft portion.

The manufacturing method of the third invention has a base portion having a swash plate sliding contact surface that is in sliding contact with the swash plate, and a receiving seat sliding contact surface that is integral with the base portion and that is in sliding contact with a receiving seat that is formed in a spherical shape on the piston. In a manufacturing method of a shoe for a compressor having a hemispherical part,
A hollow body manufacturing process for obtaining a hollow body having a hemispherical outer shape, having a cavity inside, and having an insertion port formed on the top for communicating the cavity with the outside;
A solid shaft portion is inserted into the insertion port, the base portion and the hemisphere portion are configured by the hollow body, and a support column portion is configured by the shaft portion, whereby the base portion and the hemisphere portion are formed. An assembly step for obtaining a shoe in which a cavity is formed and the base portion and the hemispherical portion are connected by the support column portion extending in the center direction of each other.

  In the manufacturing method of the third aspect of the invention, the hollow body becomes the base portion and the hemispherical portion of the shoe, and the shaft portion becomes the strut portion of the shoe. In this manufacturing method, it is also possible to make the material of the column part different from that of the hollow body. In this case, a shoe having a more practical strength can be obtained by making the support portion of a material having high rigidity.

According to a fourth aspect of the present invention, there is provided a base having a swash plate sliding contact surface that is in sliding contact with a swash plate, and a receiving seat sliding contact surface that is integral with the base and that is in sliding contact with a receiving seat that is formed in a spherical shape on the piston. In a manufacturing method of a shoe for a compressor having a hemispherical part,
A first member manufacturing step of obtaining a first member comprising a cap-shaped head and a solid shaft extending inward from the top of the head;
A second member manufacturing process for obtaining a disk-shaped second member;
By combining the tip of the shaft portion with the center of the second member, the base member is configured by the second member, the hemispherical portion is configured by the head portion, and the column portion is configured by the shaft portion, An assembly step of obtaining a shoe in which a cavity is formed between the base portion and the hemispherical portion, and the base portion and the hemispherical portion are connected by the supporting column portions extending in the center direction of each other. Features.

  In the manufacturing method of the fourth aspect of the invention, the head of the first member is the hemispherical portion of the shoe, the shaft portion of the first member is the support portion of the shoe, and the second member is the base portion of the shoe. According to this manufacturing method, it is possible to easily manufacture a shoe made of a material having a hemispherical portion and a column portion different from the base portion.

According to a fifth aspect of the present invention, there is provided a base portion having a swash plate sliding contact surface that is in sliding contact with a swash plate, and a receiving seat sliding contact surface that is integral with the base portion and that is in sliding contact with a receiving seat that is spherically formed in the piston. In a manufacturing method of a shoe for a compressor having a hemispherical part,
A first member manufacturing process for obtaining a cap-shaped first member;
A second member manufacturing step for obtaining a second member comprising a disc-shaped bottom portion and a solid shaft portion extending from the center of the bottom portion;
By connecting the tip of the shaft portion with the center of the first member, forming the base portion at the bottom portion, forming the hemispherical portion with the first member, and forming a strut portion with the shaft portion, An assembly step of obtaining a shoe in which a cavity is formed between the base and the hemisphere, and the base and the hemisphere are connected by the support column extending in the center direction of each other. And

  In the manufacturing method of the fifth invention, the first member is the hemispherical portion of the shoe, the bottom portion of the second member is the base portion of the shoe, and the shaft portion of the second member is the support portion of the shoe. According to this manufacturing method, it is possible to easily manufacture shoes made of different materials from the hemispherical part, the base part, and the support part.

According to a sixth aspect of the present invention, there is provided a base having a swash plate slidable contact surface slidably contacting with the swash plate, and a base slidable contact surface which is integral with the base and is slidably contacted with a pedestal formed in a spherical shape on the piston In a manufacturing method of a shoe for a compressor having a hemispherical part,
A first member manufacturing process for obtaining a cap-shaped first member;
A second member manufacturing process for obtaining a disk-shaped second member;
A shaft manufacturing process for obtaining a solid shaft,
One end of the shaft portion is coupled to the top of the first member, the other end of the shaft portion is coupled to the center of the second member, the second member constitutes the base, and the first member By forming the hemisphere part and the shaft part constituting the support part, a cavity is formed between the base part and the hemisphere part, and the base part and the hemisphere part extend in the center direction of each other. And an assembling step for obtaining a shoe connected by the portion.

  In the manufacturing method of the sixth aspect of the invention, the first member is the hemispherical portion of the shoe, the second member is the base portion of the shoe, and the shaft portion is the support portion of the shoe. According to this manufacturing method, it is possible to easily manufacture shoes having different materials for the hemispherical portion, the base portion, and the support portion.

  It is preferable that the base part, the hemispherical part, and the column part are made of different materials. If the materials of the base, hemisphere, and support are different, the choice of materials for the swash plate and the piston is expanded, and a more excellent compressor can be realized. Further, by making the strut portion of a material having high rigidity, a shoe with more practical strength can be obtained.

  It is also preferable to have a welding process for welding the base and the hemisphere. In this case, the base portion and the hemispherical portion are firmly coupled, and it is possible to suitably receive a compression reaction force or the like other than the support portion.

  Embodiments 1 to 6 embodying the first to sixth inventions will be described below with reference to the drawings.

  First, the variable capacity swash plate compressor will be described. As shown in FIG. 1, the compressor has a front housing 2 joined to the front end of the cylinder block 1 and a rear housing 4 joined to the rear end of the cylinder block 1 via a valve unit 3. . The cylinder block 1 and the front housing 2 are provided with shaft holes 1a and 2a extending in the axial direction, and a drive shaft 5 is rotatably supported in the shaft holes 1a and 2a via bearings or the like. . Note that the lower side in FIG. 1 is the front side, and the upper side is the rear side.

  The inside of the front housing 2 is a crank chamber 6. In the crank chamber 6, a lug plate 7 is fixed to the drive shaft 5 through a bearing device between the crank chamber 6 and the front housing 2. The crank chamber 6 is provided with a swash plate 8 having a flat front and rear surface 8 a on the outer peripheral side behind the lug plate 7. The swash plate 8 is inserted through the drive shaft 5, and the inclination angle is changed by the link mechanism 9 provided between the swash plate 8 and the lug plate 7 in this state.

  The cylinder block 1 is provided with a plurality of cylinder bores 1b extending concentrically extending in the axial direction. A single-headed piston 10 is accommodated in each cylinder bore 1b so as to be able to reciprocate. The side of the crank chamber 6 of each piston 10 is a neck portion, and a receiving seat 10a that is recessed in a spherical shape is provided on the neck portion of each piston 10 so as to face each other.

  A pair of front and rear shoes 21 is provided between the swash plate 8 and each piston 10. As shown in FIG. 2, each shoe 21 has a disk-shaped base portion 211 and a hemispherical portion 212 whose outer surface is integral with the base portion 211. The outer surface of the base 211 is a circular swash plate sliding contact surface 211 a that is in sliding contact with the swash plate 8. The peripheral edge of the swash plate sliding contact surface 211a is chamfered. The outer surface of the hemispherical portion 212 is a spherical receiving seat sliding contact surface 212 a that is in sliding contact with the receiving seat 10 a of the piston 10.

  As shown in FIG. 1, the rear housing 4 is formed with a suction chamber 4a and a discharge chamber 4b. The cylinder bore 1 b can communicate with the suction chamber 4 a via the suction valve mechanism of the valve unit 3 and can communicate with the discharge chamber 4 b via the 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 communicates with the suction chamber 4a through the detection passage 4c, and connects the discharge chamber 4b with the crank chamber 6 through the air supply passage 4d. The capacity control valve 11 detects the pressure in the suction chamber 4a, thereby changing the opening degree of the air supply passage 4d and changing the discharge capacity of the compressor. The crank chamber 6 and the suction chamber 4a communicate with each other through an extraction passage 4e. A condenser 13, an expansion valve 14 and an evaporator 15 are connected to the discharge chamber 4 b by a pipe 12, and the evaporator 15 is connected to the suction chamber 4 a by a pipe 12.

  A pulley 16 is rotatably provided at the front end of the front housing 2 via a bearing device, and the pulley 16 is fixed to the drive shaft 5. A belt 18 that is rotationally driven by an engine 17 is wound around the pulley 16.

  As shown in FIG. 3, the shoe 21 has a cavity 213 formed between a base portion 211 and a hemispherical portion 212. Further, the base portion 211 and the hemispherical portion 212 are connected by a solid column portion 214 extending in the center direction of each other.

  Each shoe 21 is manufactured by the following manufacturing method.

  First, as shown in FIG. 4A, as a material forming step, a solid material W made of, for example, SUJ2 (JIS G4805), which is an iron-based material, is prepared. This material W is a disc-shaped bottom portion W1, concentric with the bottom portion W1, a disc-shaped umbrella portion W2 having a slightly smaller diameter than the bottom portion W1, and a shaft portion that connects the bottom portion W1 and the umbrella portion W2 in the center direction. W3. The material W may be formed by casting, or may be formed by pressing or cutting.

  And as a press process, the press type | mold P which consists of the upper mold | type P1 and the lower mold | type P2 is prepared. The upper mold P1 is formed with a hemispherical concave molding surface P11 that is aligned with the seat sliding contact surface 212a of the shoe 21, and the lower mold P2 is formed with a molding surface P21 that is aligned with the swash plate sliding contact surface 211a of the shoe 21. A cavity C is formed by the molding surfaces P11 and P21. As shown in FIG. 4B, the material W is hot forged using this press die P. Thus, the bottom W1 of the material W becomes the base 211, the umbrella W2 becomes the hemispherical part 212, and the shaft part W3 becomes the support column 214. Thus, the shoe 21 of Example 1 is obtained.

  According to this manufacturing method, the shoe 21 in which the base portion 211 and the hemispherical portion 212 are made of the same material can be easily manufactured. It is also possible to perform hot forging in multiple stages. Moreover, it is also possible to make the shoe 21 by performing surface polishing on the product after pressing, or by performing surface coating such as tin plating or DLC.

  In the compressor configured as described above, the swash plate 8 rotates synchronously as the drive shaft 5 rotates, and the piston 10 reciprocates in the cylinder bore 1b via the shoe 21. Thereby, the volume of the compression chamber formed on the head side of the piston 10 changes. For this reason, the refrigerant gas in the suction chamber 4a is sucked into the compression chamber and compressed, and then discharged into the discharge chamber 4b. In this way, the refrigeration operation is performed by the refrigeration circuit including the compressor, the condenser 13, the expansion valve 14, and the evaporator 15. During this time, the swash plate sliding contact surface 211a of the base portion 211 is in sliding contact with the surface 8a of the swash plate 8, and the receiving seat sliding contact surface 212a of the hemispherical portion 212 is in sliding contact with the receiving seat 10a of the piston 10.

  At this time, since the weight of the shoe 21 is realized by the cavity 213, the reciprocating inertia force of the piston 10 can be reduced, and the capacity controllability of the compressor can be improved. Further, the shoe 21 can realize reduction of power for driving the compressor, weight reduction of the compressor, and the like.

  Further, the shoe 21 is practical because the base portion 211 and the hemispherical portion 212 are connected by a solid support portion 214, and the support portion 214 supports the force in the direction in which the base portion 211 and the hemispherical portion 212 are brought close to each other. Demonstrate strong strength.

  Therefore, the shoe 21 can achieve both weight reduction and practical strength. Therefore, according to the shoe 21, the capacity controllability, power reduction, and weight reduction of the variable displacement swash plate compressor can be achieved. In addition to the above effects, it is possible to achieve effects such as suppressing abnormal noise of the compressor and improving durability.

  Further, in the above manufacturing method, it is possible to perform a welding process of welding the base portion 211 and the hemispherical portion 212. In this case, the base portion 211 and the hemispherical portion 212 are firmly coupled, and it is possible to suitably receive a compression reaction force or the like other than the column portion 214.

  As shown in FIG. 5, the shoe 22 according to the second embodiment has an opening 215 formed between a base portion 211 and a hemispherical portion 212. The opening 215 allows the cavity 213 to communicate with the outside. Other configurations are the same as the shoe 21 of the first embodiment. This shoe 22 is used in the same compressor as in the first embodiment.

  The shoe 22 is obtained by adjusting the volume of the material W or the volume of the cavity C in the press mold P in the manufacturing method of the first embodiment.

  In the compressor using the shoe 22, the lubricating oil enters the cavity 213 through the opening 215, and the lubricating oil is discharged to the outside through the opening 215 as necessary. Therefore, the sliding contact between the swash plate sliding contact surface 211a of the base 211 and the surface 8a of the swash plate 8 and the sliding contact between the receiving seat sliding contact surface 212a of the hemispherical portion 212 and the receiving seat 10a of the piston 10 become smooth. This improves the capacity controllability of the compressor, the power reduction effect, and the like.

  Note that the openings 215 may be formed in an annular shape around the base 211, or may be formed in appropriate numbers by partially connecting the base 211 and the hemispherical part 212. In Examples 1 and 2, SUJ2 is used as the material of the shoes 21 and 22, but an aluminum alloy such as an Al-Si alloy may be used as the material of the shoe.

  As shown in FIG. 6, in the shoe 23 of the third embodiment, the material of the column part 214 is different from the material of the base part 211 and the hemispherical part 212. Other configurations are the same as the shoe 21 of the first embodiment. This shoe 23 is also used in the same compressor as in the first embodiment.

  This shoe 23 is manufactured by the following manufacturing method.

  First, as shown in FIG. 7, a hollow body W4 made of an aluminum alloy is prepared as a hollow body manufacturing process. The hollow body W4 has a hemispherical outer shape and has a cavity 213 inside. An insertion port 216 that allows the cavity 213 to communicate with the outside is formed at the top of the hollow body W4.

  Then, as an assembling step, the solid shaft portion W5 made of the aforementioned SUJ2 is press-fitted into the insertion port 216. As a result, the hollow body W4 becomes the base portion 211 and the hemispherical portion 212 of the shoe 23, and the shaft portion W5 becomes the support portion 214 of the shoe 23. Thus, the shoe 23 of Example 3 is obtained.

  In this manufacturing method, the shoe 23 having a more practical strength can be obtained by using the strut portion 214 made of a highly rigid material. In the present embodiment, the shaft portion W5 may be manufactured from an aluminum alloy. Even in this case, the hollow body W4 can be used as a shoe having higher strength than the shoe as it is.

  In the shoe 24 of Example 4 shown in FIG. 8, the material of the hemispherical part 212 and the column part 214 is different from the material of the base part 211. Other configurations are the same as the shoe 21 of the first embodiment. This shoe 24 is also used in the same compressor as in the first embodiment.

  The shoe 24 is manufactured by the following manufacturing method.

  First, as shown in FIG. 9, a first member W6 made of SUJ2 is prepared as a first member manufacturing process. The first member W6 includes a cap-shaped head portion W7 and a solid shaft portion W8 extending inward from the top of the head portion W7.

  Moreover, the disk-shaped 2nd member W9 which consists of aluminum alloys is prepared as a 2nd member manufacturing process. A concave portion 217 capable of press-fitting the shaft portion W8 is formed in the center of the second member W9.

  And as an assembly | attachment process, the front-end | tip of the axial part W8 of the 1st member W6 is press-fit in the recessed part 217 of the 2nd member W9. Thus, the head W7 of the first member W6 becomes the hemispherical portion 212 of the shoe 24, the shaft portion W8 of the first member W6 becomes the support portion 214 of the shoe 24, and the second member W9 becomes the base portion 211 of the shoe 24.

  As shown in FIG. 10, in the shoe 25 of Example 5, the material of the hemispherical part 212 is different from the material of the base part 211 and the column part 214. Other configurations are the same as the shoe 21 of the first embodiment. This shoe 25 is also used in the same compressor as in the first embodiment.

  The shoe 25 is manufactured by the following manufacturing method.

  First, as shown in FIG. 11, a cap-shaped first member W10 made of SUJ2 is prepared as a first member manufacturing process.

  Moreover, the 2nd member W11 which consists of SUJ2 similarly is prepared as a 2nd member manufacturing process. The second member W11 includes a disc-shaped bottom portion W12 and a solid shaft portion W13 extending vertically from the center of the bottom portion W12.

  And as an assembly | attachment process, the front-end | tip of the axial part W13 is couple | bonded with the center of the 1st member W10 by friction welding. Accordingly, the first member W10 becomes the hemispherical portion 212 of the shoe 25, the bottom portion W12 of the second member W11 becomes the base portion 211 of the shoe 25, and the shaft portion W13 of the second member W11 becomes the support portion 214 of the shoe 25.

  As shown in FIG. 12, the shoe 26 of the sixth embodiment is different in the material of the hemispherical portion 212, the material of the base portion 211, and the material of the column portion 214. Other configurations are the same as the shoe 21 of the first embodiment. This shoe 26 is also used in the same compressor as in the first embodiment.

  The shoe 26 is manufactured by the following manufacturing method.

  First, as shown in FIG. 13, as a first member manufacturing process, a cap-shaped first member W14 made of an aluminum alloy is prepared.

  In addition, as a second member manufacturing process, a disk-shaped second member W15 made of an aluminum alloy different from the first member W14 is prepared.

  Further, a solid shaft portion W16 made of SUJ2 is prepared as a shaft portion manufacturing process.

  Then, as an assembling step, one end of the shaft portion W16 is coupled to the top of the first member W14, and the other end of the shaft portion W16 is coupled to the center of the second member W15. Accordingly, the first member W14 becomes the hemispherical portion 212 of the shoe 26, the second member W15 becomes the base portion 211 of the shoe 26, and the shaft portion W16 becomes the support portion 214 of the shoe 26.

  In the shoe 26, since the base 211, the hemispherical part 212, and the column part 214 are made of different materials, the choice of materials for the swash plate 8 and the piston 10 is widened, and a more excellent compressor can be realized. . Further, by making the support column 214 of a material having high rigidity, the shoe 26 having a more practical strength can be obtained.

  In the above, although the 1st-6th invention was demonstrated according to Examples 1-6, the 1st-6th invention is not restrict | limited to the said Examples 1-6, suitably in the range which does not deviate from the meaning. Needless to say, it can be changed and applied.

  Further, the compressor using the shoe of the first to sixth embodiments is not limited to the capacity variable swash plate compressor as described above, and may be a fixed capacity swash plate compressor. The refrigerant gas need not be R134a, and may be carbon dioxide.

  The present invention is applicable to a vehicle air conditioner.

It is sectional drawing of the compressor using the shoes of Examples 1-6. 1 is a cross-sectional view of a main part of a compressor according to Embodiment 1. FIG. 1 is a cross-sectional view of a shoe according to Embodiment 1. FIG. FIG. 4A is a cross-sectional view showing a press die before hot forging, and FIG. 4B is a cross-sectional view showing a press die after hot forging, according to the shoe manufacturing method of Example 1. FIG. It is sectional drawing of the shoes of Example 2. FIG. It is sectional drawing of the shoes of Example 3. FIG. It is a disassembled sectional view of the shoe of Example 3. FIG. 6 is a cross-sectional view of a shoe of Example 4. FIG. 6 is an exploded cross-sectional view of a shoe of Example 4. FIG. 10 is a cross-sectional view of a shoe of Example 5. FIG. 10 is an exploded cross-sectional view of a shoe of Example 5. It is sectional drawing of the shoe | shoe of Example 6. FIG. FIG. 10 is an exploded cross-sectional view of a shoe of Example 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 8 ... Swash plate 211a ... Swash plate sliding contact surface 211 ... Base 10 ... Piston 10a ... Receiving seat 212a ... Receiving seat sliding contact surface 212 ... Hemispherical part 21-26 ... Shoe for compressors 213 ... Cavity 214 ... Strut part 215 ... Opening W ... Material P ... Press mold 216 ... Insertion port W4 ... Hollow body W5, W8, W13, W16 ... Shaft part W7 ... Head W6, W10, W14 ... First member W9, W11, W15 ... Second member W12 ... Bottom part

Claims (11)

For a compressor having a base portion having a swash plate sliding contact surface slidably contacting the swash plate, and a hemispherical portion integrally formed with the base portion and having a receiving seat sliding contact surface that is slidably contacted with a piston on a spherical surface In Shu
A compressor shoe, wherein a cavity is formed between the base portion and the hemispherical portion, and the base portion and the hemispherical portion are connected by a solid support portion extending in the center direction of each other.   The shoe for a compressor according to claim 1, wherein an opening for communicating the cavity with the outside is formed between the base and the hemisphere.   The shoe for a compressor according to claim 1 or 2, wherein the base portion and the hemispherical portion are made of different materials. For a compressor having a base portion having a swash plate sliding contact surface slidably contacting the swash plate, and a hemispherical portion integrally formed with the base portion and having a receiving seat sliding contact surface that is slidably contacted with a piston on a spherical surface In the shoe manufacturing method,
A material formation process to obtain a solid material;
By pressing the material using a press die, a cavity is formed between the base and the hemisphere, and the base and the hemisphere are connected by a solid support extending in the center direction of each other. And a pressing step for obtaining the shoe. The material forming step includes a step of forming a disc-shaped bottom portion, a disc-shaped umbrella portion, and a shaft portion connecting the bottom portion and the umbrella portion,
The pressing step uses a press mold composed of an upper mold and a lower mold, and presses the umbrella portion with the upper mold while supporting the bottom with the lower mold, thereby configuring the base at the bottom. The manufacturing method of the shoe for compressors of Claim 4 which comprises the said hemisphere part with this umbrella part, and comprises the said support | pillar part with this axial part. For a compressor having a base portion having a swash plate sliding contact surface slidably contacting the swash plate, and a hemispherical portion integrally formed with the base portion and having a receiving seat sliding contact surface that is slidably contacted with a piston on a spherical surface In the shoe manufacturing method,
A hollow body manufacturing process for obtaining a hollow body having a hemispherical outer shape, having a cavity inside, and having an insertion port formed on the top for communicating the cavity with the outside;
A solid shaft portion is inserted into the insertion port, the base portion and the hemisphere portion are configured by the hollow body, and a support column portion is configured by the shaft portion, whereby the base portion and the hemisphere portion are formed. An assembly step of obtaining a shoe in which a cavity is formed and the base portion and the hemispherical portion are connected to each other by the supporting column portions extending in the center direction of each other. . For a compressor having a base portion having a swash plate sliding contact surface slidably contacting the swash plate, and a hemispherical portion integrally formed with the base portion and having a receiving seat sliding contact surface that is slidably contacted with a piston on a spherical surface In the shoe manufacturing method,
A first member manufacturing step of obtaining a first member comprising a cap-shaped head and a solid shaft extending inward from the top of the head;
A second member manufacturing process for obtaining a disk-shaped second member;
By combining the tip of the shaft portion with the center of the second member, the base member is configured by the second member, the hemispherical portion is configured by the head portion, and the column portion is configured by the shaft portion, An assembly step of obtaining a shoe in which a cavity is formed between the base portion and the hemispherical portion, and the base portion and the hemispherical portion are connected by the supporting column portions extending in the center direction of each other. A method for producing a compressor shoe. For a compressor having a base portion having a swash plate sliding contact surface slidably contacting the swash plate, and a hemispherical portion integrally formed with the base portion and having a receiving seat sliding contact surface that is slidably contacted with a piston on a spherical surface In the shoe manufacturing method,
A first member manufacturing process for obtaining a cap-shaped first member;
A second member manufacturing step for obtaining a second member comprising a disc-shaped bottom portion and a solid shaft portion extending from the center of the bottom portion;
By connecting the tip of the shaft portion with the center of the first member, forming the base portion at the bottom portion, forming the hemispherical portion with the first member, and forming a strut portion with the shaft portion, An assembly step of obtaining a shoe in which a cavity is formed between the base and the hemisphere, and the base and the hemisphere are connected by the support column extending in the center direction of each other. A method for manufacturing a compressor shoe. For a compressor having a base portion having a swash plate sliding contact surface slidably contacting the swash plate, and a hemispherical portion integrally formed with the base portion and having a receiving seat sliding contact surface that is slidably contacted with a piston on a spherical surface In the shoe manufacturing method,
A first member manufacturing process for obtaining a cap-shaped first member;
A second member manufacturing process for obtaining a disk-shaped second member;
A shaft manufacturing process for obtaining a solid shaft,
One end of the shaft portion is coupled to the top of the first member, the other end of the shaft portion is coupled to the center of the second member, the second member constitutes the base, and the first member By forming the hemisphere part and the shaft part constituting the support part, a cavity is formed between the base part and the hemisphere part, and the base part and the hemisphere part extend in the center direction of each other. And an assembling step for obtaining a shoe connected by a section.   The method for manufacturing a shoe for a compressor according to claim 9, wherein the base portion, the hemispherical portion, and the support portion are made of different materials.   The manufacturing method of the shoe for compressors of any one of Claims 4 thru | or 10 provided with the welding process of welding the said base and the said hemisphere part.

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