WO2005028864A1 - Shoe for compressor and method of manufacturing the same - Google Patents

Abstract

A shoe (26) for a compressor formed by pressing a pipe cut to a proper dimension and allowing both a reduction in weight and the securement of strength, comprising an outline part (43) formed of a generally flat-shaped flat wall part (41) in slidable contact with a swash plate (24) and a generally hemispherical curved wall part (42) in slidable contact with the shoe receiving part (17c) of a piston (17) and a support part (44) installed across the inner surface of the flat wall part (41) and the inner surface of the curved wall part (42). An annular hollow part (45) is formed by the outline part (43) and the support part (44).

Description

 Specification

 SHU for compressor and method for manufacturing the same

 Technical field

 TECHNICAL FIELD [0001] The present invention relates to a configuration of a shoe interposed between a swash plate and a piston of a compressor and a manufacturing method thereof.

 Background art

 [0002] As a shear interposed between a swash plate and a piston of a compressor, a central hole is provided in the center of the shaft, and a circular tubular material made of carbon steel bearing steel is provided with an appropriate width along the radial direction. A method for producing a hollow semi-spherical outer shape by cutting in such a manner and press-molding the cut shred material is already known (see Patent Document 1). In addition, it is already known that an aluminum alloy is used as the material of the shoe material and that a metal plating film is formed on the surface of the shoe (see Patent Document 2).

 Patent Document 1: JP 2001-263225 A

 Patent Document 2: Japanese Patent Laid-Open No. 2002-332960

 Disclosure of the invention

 Problems to be solved by the invention

 However, as shown in FIG. 12 of Patent Document 1, the shoe described in Patent Document 1 is limited in that the opening end portion of the shear material forms the peripheral edge portion of the oil retaining hole as it is. Since there is no support means between the substantially flat flat wall portion that is in sliding contact with the swash plate and the substantially hemispherical curved wall portion that is in sliding contact with the piston receiving portion of the piston, the strength of the shoe is non-hollow. If it is relatively low compared to the case, there is a defect.

 [0004] Therefore, the present invention aims to reduce both weight and secure strength of a compressor shoe formed from a pipe cut to an appropriate size, and to simplify such a compressor shoe. The object is to provide a low-cost manufacturing method.

 Means for solving the problem

[0005] The compressor shroud according to the present invention includes an outer shape portion configured by a substantially flat flat wall portion that is in sliding contact with the swash plate, and a substantially hemispherical curved wall portion that is in sliding contact with the shoulder receiving portion of the piston. Flat wall And a support portion constructed from the inner side surface of the curved portion to the inner side surface of the curved wall portion, and an annular inner space is defined by the outer shape portion and the support portion. Section 1). The raw materials for this compressor shroud may be non-ferrous alloys such as aluminum alloys, titanium alloys, magnesium alloys, and iron-based alloys such as bearing steel (SUJ2). Further, the outer portion of the compressor show may be treated with a DLC film, a NiP film, a NiPB film, a NiPPTFE film, a tin film, or the like as a surface treatment.

 [0006] An example of a compressor shroud according to the present invention is shown as follows. One cylindrical material is processed, and the portions that were open ends of the material form the support portion. (Claim 2). The compressor shush having such a configuration is a substantially flat surface that is in sliding contact with a swash plate by pressing a material against an appropriate width on a material processing step for cutting a cylindrical material into an appropriate width. After the flat wall portion is formed, the outer portion is formed by pressing a portion other than the flat wall portion of the material in the center direction to form a substantially hemispherical curved wall portion that is in sliding contact with the piston shoulder receiving portion. By a method comprising an outer shape forming step and a support portion forming step of forming the support portion by extending the central portion of the flat wall portion and the curved wall portion inward until they abut against each other. Manufactured (Claim 5). Note that the abutment method in the support portion may be a through-hole formed, a bottomed hole opened to the flat wall portion side, or a curved wall portion side. A bottomed hole may be formed in the bottom.

[0007] Further, another example of the compressor show according to the present invention will be described. It is configured by covering a single cylindrical material, and the portions that are open end portions of the material are the outer shape portions. In this case, there is one that is in contact with the piston and the swash plate of the outer shape portion (claim 3). The compressor shush having such a configuration is a material processing step of cutting a cylindrical material into an appropriate width, and the both side opening end portions of the material are drawn outward, and the both side opening ends of the material are The outer portion and the support portion that form an outer shape portion formed of a flat portion surface portion and a curved surface portion and a support portion that extends from the inner side surface of the flat wall portion to the inner side surface of the curved wall portion. (Claim 6). The abutting method may be that the surfaces of the end portions abut against each other completely, or a part of the corners such as corners of the end portions may abut. Also, Regardless of whether a through hole is formed at the center of the shoe or a bottomed hole that opens to the flat wall side, a bottomed hole that opens to the curved wall side May be formed.

 [0008] Further, a resin may be disposed in the hollow portion in contact with at least the inner surface of the flat wall portion and the inner surface of the curved wall portion (Claim 4). Thus, when the resin is disposed in the hollow portion, in the manufacture of the compressor shroud according to claim 2 described above, it is assumed that the resin is formed on the inner peripheral surface of the material (claims). 7). Further, in manufacturing the compressor show according to claim 3 described later, it is assumed that resin is formed on the outer peripheral surface of the material (claim 8).

 The invention's effect

 [0009] Therefore, according to the present invention, because the annular hollow portion is provided in the interior, the weight of the compressor shear can be reduced. Therefore, when used as a shear for a variable capacity compressor, Since the reciprocating inertia force is reduced, the controllability for the compressor is improved. In addition, since the flat wall portion and curved wall portion that form the outer shape of the compressor shoe are connected and supported by the support portion, the strength of the compressor shoe is reduced while reducing its weight. The power to do S. However, since the manufacturing process for these compressor shrews is performed only by pressing and not through welding, etc., the process time for manufacturing the compressor shw is reduced and the manufacturing cost is reduced. You can also.

 [0010] In particular, according to the invention described in claims 4, 7, and 8, the resin is in the hollow portion of the compressor shoe, one is in contact with the inner peripheral surface of the flat wall portion, and the other is in the inner periphery of the curved wall portion. Since it is arranged in contact with the surface, the strength of the compressor shout can be further improved. In addition, even if the opening ends of the cylindrical material do not collide with each other and there is a gap, the gap can be closed with resin, so that the substantially sealed hollow portion I can plan. Brief Description of Drawings

 FIG. 1 is a cross-sectional view showing an overall configuration of a compressor.

 [FIG. 2] FIG. 2 shows a compressor shroud, FIG. 2 (a) is a cross-sectional view of the overall configuration, and FIGS. 2 (b) to (d) show the configuration of the support section. It is a principal part expanded sectional view shown.

[FIG. 3] FIGS. 3 (a) to 3 (e) show an outline of the manufacturing process of the compressor show shown in FIG. 2 (a). FIG.

 [FIG. 4] FIGS. 4 (a) to 4 (f) show an outline of the process when a synthetic resin is arranged on the inner peripheral surface of a cylindrical member as a raw material in the manufacturing process of the compressor shoe shown in FIG. It is explanatory drawing shown.

 [FIG. 5] FIGS. 5 (a) to 5 (c) are explanatory views showing an outline of a process for manufacturing a compressor case by a method different from the manufacturing process shown in FIG. 3 and FIG.

 6 (a) to 6 (c) are cross-sectional views of the entire configuration showing a modification of the compressor shoe manufactured in the manufacturing process of FIG.

 [FIG. 7] FIGS. 7 (a) to 7 (c) show an outline of the process when synthetic resin is arranged on the outer peripheral surface of a cylindrical member as a raw material in the manufacturing process of the compressor show in FIG. It is explanatory drawing.

 Explanation of symbols

[0012] 17 piston

 17c Shu receiving part

 24 Swashplate

 26 Shu (Compressor Shu)

 41 Flat wall

 42 Curved wall

 43 Outline

 44 Support

 45 Hollow part

 48 materials

 49 Open end

 55 resin

 BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, a variable capacity swash plate compressor is shown as an example of the compressor. This compressor has a cylinder block 1, a rear head 3 assembled on the rear side (right side in the figure) of the cylinder block 1 via a valve plate 2, and a front side (left side in the figure) of the cylinder block 1. And a front head 4 assembled so as to be closed. This The front head 4, the cylinder block 1, the valve plate 2, and the rear head 3 are fastened in the cylinder axial direction by fastening bolts 5, and constitute a housing for the entire compressor.

 A crank chamber 6 defined by the front head 4 and the cylinder block 1 accommodates a drive shaft 7 having one end protruding from the front head 4. A relay member 9 attached along the axial direction by bolts 8 is fixed to the projecting portion of the front shaft 4 of the drive shaft 7, and the end of the front head 4 is rotatably attached to the relay member 9. A driving pulley 10 that is fitted and connected to the engine of the vehicle via a belt is fixed by means such as screwing. Further, one end side of the drive shaft 7 is rotatably supported by a shaft seal device including a shaft seal 21 provided between the front head 4 and the other end side of the drive shaft 7 is accommodated in the cylinder block 1. The radial bearing 13 and the thrust bearing 14 are rotatably supported.

 [0016] The cylinder block 1 includes a bearing housing chamber 15 for housing the radial bearing 13 and the thrust bearing 14, and a circumference around the drive shaft 7 so as to surround the drive shaft 7 at equal intervals. A plurality of cylinder bores 16 are formed. In each cylinder bore 16, a single-head piston 17 composed of a hollow head portion 17a and a tail portion 17b is inserted so as to be capable of reciprocating. In addition, a shoulder receiving portion 17c having a concave curved surface is formed on the head portion 17a and the tail portion 17b of the one-head piston 17 so as to face each other in order to arrange a shoe 26 described later.

 A thrust flange 18 that rotates integrally with the drive shaft 7 is fixed to the drive shaft 7 in the crank chamber 6. The thrust flange 18 is rotatably supported with respect to the front head 4 via a radial bearing 19 and a thrust bearing 20, and is disposed between the front head 4 and the front head 4 on the tip side supported by the radial bearing 19. A drive shaft seal chamber 22 for accommodating the shaft seal 21 is formed.

In addition, a swash plate 24 is connected to the thrust flange 18 via a link mechanism 23. This swash plate 24 is attached so as to be swingable around a hinge ball 25 loosely fitted to the drive shaft 7 and is rotated integrally with the rotation of the thrust flange 18. The The swash plate 24 has a pair of shunts provided so that the peripheral portion is sandwiched between the front and rear. It is moored to the tail 17b of the single-headed piston 17 through one 26. Accordingly, when the drive shaft 7 rotates, the swash plate 24 rotates accordingly, and the rotational motion of the swash plate 24 is converted into the reciprocating linear motion of the single-headed piston 17 via the shroud 26. As a result, the volume of the compression chamber 27 formed between the single-headed piston 17 and the valve plate 2 in the cylinder bore 16 is changed.

 The valve plate 2 is formed with suction holes 28 and discharge holes 29 corresponding to the respective cylinder bores 16, and the rear head 3 has suction chambers for storing the working fluid supplied to the compression chambers 27. 30 and a discharge chamber 31 for storing the working fluid discharged from the compression chamber 27 are provided. The suction chamber 30 is formed in the central portion of the rear head 3, communicates with a suction port (not shown) that communicates with the outlet side of the evaporator, and communicates with the compression chamber 27 through the suction hole 28 of the valve plate 2. It has become. The discharge chamber 31 is continuously formed around the suction chamber 30 and communicates with a discharge port 35 leading to an inlet side of a condenser (not shown) and is connected to the compression chamber via a discharge hole 29 of the valve plate 2. Communication with 27 is possible. Here, the suction hole 28 is opened and closed by a suction valve 32 provided on the front side end face of the valve plate 2, and the discharge hole 29 is opened and closed by a discharge valve 33 provided on the rear side end face of the valve plate 2. It has become so.

 In the compressor having such a configuration, when the drive shaft 7 rotates, the rotational force of the drive shaft 7 is transmitted to the swash plate 24 through the thrust flange 18 and the link mechanism 23, and the swash plate 24 is rotated. The Then, the rotation of the swash plate 24 causes the one-head piston 17 to reciprocate through the shoe 26. Further, when the single-headed piston 17 reciprocates in the cylinder bore 16, the volume of the compression chamber 27 changes, and the suction, compression, and discharge of the working fluid are sequentially performed by this volume change, and according to the inclination angle of the swash plate 24. A high-pressure working fluid having a capacity is discharged from a discharge port (not shown) to another device constituting the refrigeration cycle.

 Then, as shown in FIG. 2 (a), the shoe 26 has a substantially flat flat wall portion 41 that is in sliding contact with the swash plate 24, and a substantially hemispherical curve that is in sliding contact with the shoe receiving portion 17c. The outer portion 43 formed by the wall portion 42 and the support portion 44 that connects the flat wall portion 41 and the curved wall portion 42 to each other. A hollow portion 45 is formed.

[0022] Here, Shu 26 is a non-ferrous material such as an aluminum alloy, a titanium alloy, a magnesium alloy, or the like. It may be made of an alloy or an iron-based alloy such as bearing steel (SUJ2). The surface of the outer part 43 of SHU 26 is treated with a DLC film, NiP film, The coating layer 53 may be formed by performing a plating treatment such as a Ni PB coating, a NiPPTFE coating, or a tin coating.

 [0023] The support portion 44 is formed by abutting open end portions 49, 49 of a pipe-shaped material 48, which will be described later, and in FIG. 2 (a) and FIG. Although the cylindrical body is formed with the through-passage 46 extending along the axial direction, the present invention is not necessarily limited thereto. As shown in FIG. 2 (c), on the curved wall portion 42 side of the support portion 44, the opening end portion 49 is squeezed in the radial direction so that the inner side surface is brought into close contact with the flat wall portion 41 of the support portion 44. A bottomed hole 47 opened only on the side may be provided along the axial direction. On the other hand, as shown in FIG. 2 (d), on the flat wall portion 41 side of the support portion 44, the opening end portion 49 is squeezed in the radial direction and the inner side surface is sealed to support the support portion 44. A bottomed hole 47 opened only on the curved wall portion 42 side of the portion 44 may be provided along the axial direction.

 [0024] With such a configuration of the shoe 26, the flat wall portion 41 and the curved wall portion 42 that mainly define the hollow portion 45 are supported by the support portion 44 while having the hollow portion 45 inside. As a result, it is possible to reduce both weight and strength of the Shu 26.

[0025] An example of a manufacturing method of the shoe 26 shown in Fig. 2 (a) will be outlined below with reference to Fig. 3. First, as shown in FIG. 3 (a), one pipe-shaped (cylindrical) material 48 is cut into appropriate dimensions. Next, as shown in FIG. 3 (b), the opening end 49 on one side of the cut material 48 is squeezed inward by pressing. The part squeezed inward is a part to be a material on one side of the support portion 44. Further, as shown in FIG. 3 (c), the flat wall portion 41 is formed by pressing. Furthermore, as shown in FIG. 3 (d), by pressing the portion from the end side of the flat wall portion 41 to the other opening end portion 49 side so as to be substantially hemispherical, A curved wall portion 42 is formed. In this case, the open end 49 is not completely closed, and a small hole 50 is opened. Then, as shown in FIG. 3 (e), the element on the other side of the support portion 44 is formed by performing press working and bending the peripheral portion of the hole 50 of the opening end portion 49 inward. Finally, the base portion of the support portion 44 is pressed, for example, to further extend inwardly to form the support portion 44. Thereafter, surface treatment is performed to form the above-described coating layer 53. As a result, a shoe 26 as shown in FIG. 2 (a) is formed. In this way, the outer shape 43 and the support portion 44 of the shoe 26 are formed only by pressing, and the process such as welding is not performed. Is possible.

[0026] As the material 48 of the shout 26, as shown in FIG. 4 (a), a material in which a layer made of a resin 55 is formed on the inner surface may be used. When the shroud 26 is manufactured using such a material 48 through the steps shown in FIG. 4 (a) to FIG. (E), as shown in FIG. At least, the shoe 26 in which the resin 55 is arranged in contact with the inner side surface of the flat wall portion and the inner side surface of the curved wall portion can be formed. Incidentally, the manufacturing method of the shoe 26 shown in FIGS. 4 (a) to 4 (e) is the same as that shown in FIGS. 3 (a) to 3 (e) above for the formation of the outer portion 43 and the support portion 44. Therefore, the same reference numerals are given and description thereof is omitted. Although not shown, the shoe 26 may be formed using a material 48 in which the cylindrical body of the material 48 is filled with the resin 55 without a gap. By adopting the shear 26 in which the resin 55 is disposed in the hollow portion 45, the strength of the shear 26 is further improved because it is in contact with the inner side surface of the flat wall portion 41 and the inner side surface of the curved wall portion 42. In addition, as shown in FIG. 4 (f), even if the ends of the support portion 44 are not in contact with each other, the force to fill the space between the flat wall portion 41 and the curved wall portion 42 with the resin 55 is obtained. S can.

Next, a manufacturing method different from the previous manufacturing method of the shout 26 will be outlined below with reference to FIG. First, as shown in FIG. 5 (a), one pipe-shaped (cylindrical) material 48 cut to an appropriate size is prepared. It is preferable to use a material having a relatively smaller diameter than the material 48 of FIG. 3A described above, such as the inner diameter of the material 48 being equal to the inner diameter of the through-passage 46 of the shoe 26, for example. Then, as shown in FIG. 5 (b), the material 48 is spread out by pressing it outward from the opening edge portions 49 on both sides. As a result, as shown in FIG. 5 (c), the flat wall 41 is formed from one open end of the material 48 to a predetermined range, and the curved wall 42 is formed from the other open end of the material 48 to the predetermined range. The part that was not spread between them becomes the cylindrical support 44. Even in this manufacturing method, the outer shape 43 and the support portion 44 of the shoe 26 are formed only by pressing, and the steps such as welding are not performed. Therefore, the process time for manufacturing the shoe 26 is shortened and the manufacturing cost is reduced. Reduction Can be achieved. Also, since the outer shape portion 43 and the support portion 44 are simultaneously formed in one process, the manufacturing process can be further simplified. The same components as those of the previous embodiment, such as the hollow portion 45 and the coating layer 53, are denoted by the same reference numerals and omitted.

[0028] It should be noted that the force which is the shoe 26 manufactured by the above manufacturing method, as shown in Fig. 6 (a), the surfaces of the open end portions do not completely abut each other in the manufacturing process, and the corners thereof. It's good even if you hit it. Further, as shown in FIG. 6 (b), in the manufacturing process, a bottomed hole 47 opened only on the flat wall portion 41 side by closing and closing one opening portion of the material 48 may be used. Further, as shown in FIG. 6 (c), in the manufacturing process, the other opening portion of the material 48 may be closed and closed to form a bottomed hole 47 opened only on the curved wall portion 42 side. In addition, the same code | symbol is attached | subjected about the structure similar to the previous embodiment, and it abbreviate | omits.

 Furthermore, instead of the material 48 in FIG. 5 (a), as shown in FIG. 7 (a), a material 48 in which a resin 55 is formed on the outer peripheral surface may be used. As shown in Fig. 5 (b), this allows the material 48 to be flattened in the hollow portion 45 of the shoe 26 by appropriately pushing it outward from the open end portion of the material 48 as shown in Fig. 7 (b). Resin 55 is disposed in contact with the inner surface of the wall 41 and the inner surface of the curved wall 42. By using the shoe 26 in which the resin 55 is disposed in the hollow portion 45 as described above, the strength of the shoe 26 is further improved.

Claims

The scope of the claims  [1] An outer shape composed of a substantially flat flat wall portion that is in sliding contact with the swash plate, a substantially hemispherical curved wall portion that is in sliding contact with the piston receiving portion of the piston, and the bending from the inner surface of the flat wall portion A compressor shroud characterized in that it has a support portion erected over the inner surface of the wall portion, and an annular inner space is defined by the outer shape portion and the support portion.  [2] The present invention is characterized in that it is configured by processing one cylindrical material, and the portions that were the open ends of the material are in a state of abutting each other when forming the support portion. A compressor shredder described in 1.  [3] It is configured by processing one cylindrical material, and the parts that were the open ends of the material are not in sliding contact with the piston and swash plate of the outer part when forming the outer part. 2. The compressor shroud according to claim 1, wherein the compressor is in a bumped state.  [4] The compression according to claim 1, 2 or 3, wherein a resin is disposed in the hollow portion in contact with at least the inner surface of the flat wall portion and the inner surface of the curved wall portion. Machine Shu [5] A material caching process for cutting a cylindrical material into an appropriate width;  By pressing against the one opening side portion of the material, a substantially flat flat wall portion that is in sliding contact with the swash plate is formed, and then a portion other than the flat wall portion of the material is pressed in the center direction so Forming a contour portion by forming a substantially hemispherical curved wall portion that is in sliding contact with the receiving portion; and  And a support portion forming step of forming a support portion by extending the central portion of the flat wall portion and the curved wall portion toward the inside until they abut against each other. Method.  [6] A material caching process for cutting a cylindrical material into an appropriate width;  The both side opening end portions of the material are drawn outward, and the both side opening ends of the material are abutted against each other, so that the outer shape portion composed of a flat portion surface portion and a curved surface portion and the inner surface of the flat wall portion A method of manufacturing a compressor shroud, comprising: an outer shape portion forming a support portion installed over an inner surface of the curved wall portion; and a support portion forming step. [7] The material according to claim 4, wherein a resin is formed on an inner peripheral surface of the material. Of manufacturing a compressor for a compressor. 8. The method for manufacturing a compressor shroud according to claim 5, wherein the material has a resin formed on an outer peripheral surface thereof.