JP2011032883A - Swash plate type hydraulic rotary machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost swash plate type hydraulic rotary machine without a risk of a decrease in its life due to wear, which prevents seizure dispensing with special work. <P>SOLUTION: The swash plate type hydraulic rotary machine includes a piston shoe 11, a retainer 12 in an annular flat plate shape, and a retainer guide 13 in a hemi-spherical surface shape, respectively made of an iron material. On a sliding surface of any one of the retainer 12 and the piston shoe 11 sliding with the retainer 12, or any one of the retainer 12 and the retainer guide 13 sliding with the retainer 12, a conforming layer 19 with a copying surface copying the shape of a mating member is arranged. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hydraulic pump that is provided in a construction machine such as a hydraulic excavator and is used as a hydraulic pump that supplies hydraulic fluid to a hydraulic cylinder or the like or a hydraulic motor that is rotationally driven by the supplied hydraulic fluid.

  Among the swash plate type hydraulic rotating machines, there is a variable displacement swash plate type hydraulic motor that is widely used in general. For example, a structure as shown in FIG. 4 is known. This hydraulic motor is provided with a cylinder block 7 in a sealed space formed in a casing 1 composed of a head casing 2 and a lid 3 so as to be rotatable, and a plurality of concentric cylinder blocks 7 are arranged at predetermined intervals in the circumferential direction. These cylinders 8 are perforated, and pistons 10 are inserted into the respective cylinders 8 so as to be reciprocally movable. The cylinder block 7 is provided with a rotating shaft 4 rotatably supported by bearings 5 and 6 at the center of rotation, and each piston 10 is connected to the swash plate 14 side by sucking the working fluid from the suction port 18 to each cylinder 8 sequentially. Are pushed out sequentially. Then, the piston shoe 11 provided so as to be able to rotate by being fitted to the tip of the piston 10 is pressed against the swash plate 14 while sliding on the swash plate 14, and the swash plate 14 is pressed against the axial direction of the piston 10. Since the piston shoe 11 slides on the swash plate 14, the cylinder block 7 is rotated by the reaction force of the pressing force, and the rotating shaft 4 is further rotated. The swash plate 14 is supported by a tilt support block 15 on the surface opposite to the sliding side of the piston shoe 11, and the capacity is changed by changing the tilt by the tilt control piston 16. The piston shoe 11 slides on the surface of the swash plate 14 while being guided by the retainer 12.

  The retainer 12 has the piston shoe 11 inserted through shoe insertion holes 12B provided at equal intervals around the retainer guide insertion hole 12A. Since the diameter of the shoe pad 11A, which is the end portion of the piston shoe 11 on the swash plate 14 side, is set larger than the diameter of the shoe insertion hole 12B, the retainer 12 is shoeed by the shoe presser 12C in the vicinity of the shoe insertion hole 12B. It slides with the pad 11A and rotates while urging the piston shoe 11 toward the swash plate 14 side. The retainer guide 13 is inserted between the cylinder block 7 and the retainer 12 so that the convex surface faces the swash plate 14 side, and the end surface of the retainer guide 13 is moved to the swash plate 14 side by a spring 17 incorporated in the cylinder block 7. The retainer 12 is slid with the inner surface of the retainer guide insertion hole 12 </ b> A of the retainer 12 on the convex outer peripheral surface, and the retainer 12 is positioned. As shown in FIG. 5, the spring 17 is accommodated in a spring seat hole 7 </ b> A provided concentrically between the cylinder 8 drilled in the cylinder block 7 and the rotating shaft 4.

  As described above, since the swash plate type hydraulic rotating machine has sliding surfaces on which members slide, there is a risk of seizure or galling on these sliding surfaces.

  In order to prevent seizure or the like on the sliding surface, for example, in Patent Document 1, in a variable displacement type axial piston hydraulic pump, a high-concentration surface in which a convex phosphate arc surface on a movable swash plate is subjected to a manganese phosphate coating treatment or the like. A technique is disclosed in which a slidable layer is provided and a thrust metal is separately provided on the sliding surface side of a support member that is a counterpart member that slides on the slidable layer. As the thrust metal, a slidable tin-based alloy called white metal is generally used like the sliding surface of a pump bearing shown in Patent Document 2. In the prior art disclosed in Patent Document 3, a member with good sliding properties such as white metal is used on the sliding surface of a thrust plate that slides with a piston shoe in a variable displacement axial piston pump. In Patent Documents 2 and 3, the mating member that slides with the white metal is not particularly mentioned, but since the combination of white metal and SUS403 is evaluated in the abrasion test of Patent Document 2, a steel material that is an iron-based material is used. Presumed to be used.

  In Patent Document 4, the inner peripheral surface of the retainer guide insertion hole of the retainer that slides with the retainer guide is processed into a spherical surface in order to prevent seizure and wear of the sliding portion between the retainer and the retainer guide and to extend the life. Thus, a technique for reducing the contact surface pressure between the retainer and the retainer guide is disclosed.

JP-A-7-63157 JP 2000-356223 A JP-A-6-2648 JP 2007-255215 A

  In the prior art disclosed in Patent Document 1 described above, in the variable displacement axial piston pump, the movable swash plate is provided with a high slidability layer having high surface hardness by nitriding treatment or manganese phosphate chemical conversion treatment, etc. A thrust metal is provided on the support member of the movable swash plate as a counterpart member on which the swash plate slides. That is, in the members that slide relative to each other, slidability is ensured by using a high hardness material on one side and a relatively soft material on the other side. In such a combination of materials, there is a concern about wear due to sliding of the material on the soft side in particular. However, in the conventional technique shown in Patent Document 1, the sliding area in the sliding portion of the movable swash plate and the support member By increasing the contact pressure, the contact surface pressure is reduced and the problem of wear due to sliding is avoided. However, in a hydraulic rotating machine such as a hydraulic pump, there are other sliding parts. For example, in the case of a piston shoe or a retainer guide which is a counterpart member for sliding with the retainer, the retainer and the retainer guide slide. In the retainer guide insertion hole inner peripheral portion of the retainer, and because of the line contact with a small contact area, the surface pressure is very high, and there is a problem that the white metal is significantly worn. Further, the retainer and the piston shoe slide between the retainer shoe presser and the shoe pad, and the sliding area is also small and the contact surface pressure is high. Therefore, when the prior art disclosed in Patent Document 1 is applied, there is a problem that the sliding surface is easily worn.

  On the other hand, in the conventional technique shown in Patent Document 2, the contact surface pressure is low because the radial bearing with a large load has a large sliding area, and the load is not as large as with the radial bearing in the thrust bearing. Even if soft white metal is used for the sliding surface, the problem of wear is not so obvious. And even in the prior art shown in Patent Document 3, the sliding surface of the thrust plate to which white metal is applied has a large sliding area of the shoe which is a counterpart member of sliding, so the surface pressure is low, and the problem of wear is It does not appear. However, even in these conventional techniques, the contact surface pressure of the sliding portion becomes large at a portion where sliding is local, and the problem of wear becomes obvious, so that the applicable portion is limited.

  Moreover, although the prior art shown in Patent Document 4 is effective in reducing the contact surface pressure between the retainer and the retainer guide, the processing accuracy is required because the inner peripheral surface of the retainer guide insertion hole is spherically processed. . For this reason, processing cost is high, and it is difficult to apply to mass-produced products.

  As described above, with respect to the piston shoe or the retainer guide, which is a mating member that slides with the retainer, the conventional technology as disclosed in Patent Documents 1 to 3 is used, and the sliding property like white metal is good. However, when a relatively soft material is applied to the sliding surface, the contact area of the sliding portion is small, so that the surface pressure is very high, and the white metal wears significantly. In that case, it is necessary to disassemble the hydraulic rotating machine and replace the worn member, and maintenance is complicated. The technique disclosed in Patent Document 4 is effective in reducing the contact surface pressure of the sliding member, but requires processing accuracy and is difficult to apply in terms of cost. Therefore, there is a need for a low-cost swash plate type hydraulic rotating machine that prevents sliding and is not liable to reduce the life due to wear even in a region where sliding is local and the contact surface pressure at the sliding portion is high. It was.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to quickly reduce the contact surface pressure on the sliding surface between the retainer and the piston shoe or the retainer guide, thereby preventing seizure and the like. An object of the present invention is to provide a swash plate type hydraulic rotating machine that can be prevented and that does not have a risk of life reduction due to wear at a low cost.

  In order to achieve this object, a swash plate type hydraulic rotating machine according to the present invention includes a casing, a rotating shaft rotatably provided in the casing, and a rotating shaft integrated with the rotating shaft. And a cylinder block formed with a plurality of cylinders spaced apart in the circumferential direction and extending in the axial direction, and inserted into each cylinder of the cylinder block so as to reciprocate, and one end side in the axial direction protrudes from the cylinder. A plurality of pistons, a piston shoe made of an iron-based material, mounted on the protruding end of each of these pistons, and a surface that faces the cylinder block and faces the cylinder block Between the piston shoe and the projecting end of each piston, and is inserted into the rotating shaft. An annular flat plate retainer made of an iron-based material having a plurality of insertion holes that are inserted through the piston shoes and pressed against the sliding surface of the swash plate, and between the retainer and the cylinder block In a swash plate type hydraulic rotating machine comprising a hemispherical retainer guide made of an iron-based material that is positioned and inserted into the rotating shaft and presses the retainer toward the swash plate by an outer peripheral surface A familiar layer having a surface that follows the shape of the mating member is provided on one of the sliding surfaces of the retainer and the retainer guide that slides with the retainer.

  In the present invention configured as described above, since one of the sliding surfaces of the retainer and the retainer guide, which are iron-based materials, includes a familiar layer having a surface that follows the shape of the mating member, it is familiar to the beginning of sliding. By forming a copying surface in which the layer follows the shape of the mating member, the sliding area increases and the contact surface pressure can be quickly reduced. All sliding members are ferrous materials and not easily worn like white metal, so the familiar layer on the sliding surface of one sliding member forms a copying surface that follows the other shape. After that, there is no risk of progress of wear. That is, by forming a copying surface and reducing the contact surface pressure, it is possible to provide a swash plate type hydraulic rotating machine that prevents seizure and the like and that does not have a risk of life reduction due to wear.

  A swash plate type hydraulic rotating machine according to the present invention includes a casing, a rotary shaft rotatably provided in the casing, and a circumferentially spaced apart rotary shaft provided to rotate integrally with the rotary shaft. A cylinder block formed with a plurality of cylinders extending in the axial direction, a plurality of pistons inserted into the cylinders of the cylinder block so as to be reciprocally movable, and one end side in the axial direction projecting from the cylinder, and A piston shoe made of an iron-based material, mounted on the protruding end of each piston, and each shoe slides on a surface facing the cylinder block and facing the cylinder block. Between the piston shoe and the projecting end of each piston, and is inserted through the rotary shaft and positioned between each piston shoe. A retainer of an annular flat plate made of an iron-based material having a plurality of insertion holes that are inserted into the swash plate and pressed against the sliding surface of the swash plate, and is located between the retainer and the cylinder block. In the swash plate type hydraulic rotating machine including a hemispherical retainer guide made of an iron-based material that is inserted into a rotating shaft and presses the retainer toward the swash plate by an outer peripheral surface, the retainer, In addition, a familiar layer having a surface that follows the shape of the mating member is provided on one sliding surface of the piston shoe that slides with the retainer. In the present invention configured as described above, the sliding surface of either the retainer or the piston shoe, which are iron-based materials, includes a familiar layer having a surface that follows the shape of the mating member. When the moving surface follows the shape of the mating member, the sliding area increases and the contact surface pressure can be quickly reduced. All sliding members are ferrous materials and not easily worn like white metal, so the familiar layer on the sliding surface of one sliding member forms a copying surface that follows the other shape. After that, there is no risk of progress of wear. That is, by forming a copying surface and reducing the contact surface pressure, it is possible to provide a swash plate type hydraulic rotating machine that prevents seizure and the like and that does not have a risk of life reduction due to wear.

  A swash plate type hydraulic rotating machine according to the present invention includes a casing, a rotary shaft rotatably provided in the casing, and a circumferentially spaced apart rotary shaft provided to rotate integrally with the rotary shaft. A cylinder block formed with a plurality of cylinders extending in the axial direction, a plurality of pistons inserted into the cylinders of the cylinder block so as to be reciprocally movable, and one end side in the axial direction projecting from the cylinder, and A piston shoe made of an iron-based material, mounted on the protruding end of each piston, and each shoe slides on a surface facing the cylinder block and facing the cylinder block. Between the piston shoe and the projecting end of each piston, and is inserted through the rotary shaft and positioned between each piston shoe. A retainer of an annular flat plate made of an iron-based material having a plurality of insertion holes that are inserted into the swash plate and pressed against the sliding surface of the swash plate, and is located between the retainer and the cylinder block. In the swash plate type hydraulic rotating machine comprising a hemispherical retainer guide made of an iron-based material, which is inserted into a rotating shaft and presses the retainer toward the swash plate by an outer peripheral surface. Further, a familiar layer having a surface that follows the shape of the sliding counterpart member is provided on the sliding surface of the retainer that slides with the retainer guide, and the familiar layer is not provided on the retainer guide and the piston shoe. It is characterized by. In the present invention configured as described above, only the sliding surface of the retainer is provided with the familiar layer having the surface following the shape of the retainer guide and the piston shoe as the mating member. By following the shape of the retainer guide and the piston shoe, the sliding area increases, and the contact surface pressure can be quickly reduced. In addition, the sliding members are all iron-based materials and are not easily worn like white metal, so the familiar layer on the sliding surface of the retainer forms a copying surface that follows the shape of the retainer guide and piston shoe. After that, there is no risk of progress of wear. That is, by forming a copying surface and reducing the contact surface pressure, it is possible to provide a swash plate type hydraulic rotating machine that prevents seizure and the like and that does not have a risk of life reduction due to wear.

  Further, in the swash plate type hydraulic rotating machine according to the present invention, as the diameter of the retainer guide insertion hole formed in the sliding surface on the retainer that slides with the retainer guide approaches the retainer guide side in the above invention. It is characterized by an expanding taper shape. In the present invention configured as described above, copying of the retainer by sliding on the retainer guide that is a spherical surface starts from an inner wall surface intermediate portion of the retainer guide insertion hole as a starting point. For this reason, when the shape of the retainer guide insertion hole in the thickness direction is, for example, a straight shape, the formation of the copying surface on the retainer guide starts from the end of the retainer guide insertion hole. Whereas the pressure is remarkably high, in the case of a tapered shape, the contact surface pressure between the retainer and the retainer guide at the start of sliding can be reduced. If the retainer guide insertion hole is a spherical surface, the contact surface pressure between the retainer and the retainer guide can be reduced, but machining with a high degree of accuracy so that the curvature of the retainer guide's spherical surface matches the curvature is a processing cost. Increase.

  Further, the swash plate type hydraulic rotating machine according to the present invention is the swash plate type hydraulic rotating machine according to the present invention, wherein the conforming layer is subjected to a chemical conversion film treatment on the sliding surface, and then the sliding surface subjected to the chemical conversion film treatment is a counterpart. It is characterized in that a surface that follows the shape of the mating member is formed by sliding with the member. In the present invention configured as described above, after applying a widely used chemical conversion film treatment to the sliding surface, it is slid with the mating member during operation, thereby having a familiar surface having a copying surface that follows the shape of the mating member. Since the layer can be formed, special machining for forming the copying surface is not required. For this reason, the copying surface can be formed at low cost.

  The swash plate type hydraulic rotating machine according to the present invention is characterized in that, in the above invention, the chemical film treatment is a film formation treatment with manganese phosphate. Manganese phosphate can form a relatively thick film of 5 to 15 μm among the chemicals used for the treatment for forming a chemical conversion film, and therefore the tolerance of the conforming layer to follow the shape of the mating member can be improved.

  In the swash plate type hydraulic rotating machine, the familiar layer having a surface that follows the shape of the mating member is provided on the retainer and one sliding surface of the retainer guide that slides with the retainer or the piston shoe. When the sliding member provided with the familiar layer slides with the mating member, the contact surface pressure between the sliding members can be quickly reduced by following the shape of the mating member in the early stage of sliding. Thereby, it is possible to prevent a reduction in life due to seizure or wear, which has conventionally occurred on the sliding surface between the retainer made of the same iron-based material and the retainer guide or the piston shoe, by simple processing. That is, it is possible to provide a high-performance hydraulic rotating machine suitable for mass production at low cost without requiring special processing.

It is a principal part cross-sectional view which shows 1st Embodiment of the swash plate type hydraulic rotating machine which concerns on this invention. FIG. 2 is an enlarged cross-sectional view of the first embodiment shown in FIG. 1, (a) is a diagram showing a shape before a familiar layer provided on the retainer follows the shape of the retainer guide, and (b) is a diagram. It is a figure which shows the shape after copying. FIG. 2 is an enlarged cross-sectional view of the first embodiment shown in FIG. 1, (a) is a diagram showing a shape before a conforming layer provided on a retainer follows the shape of a piston shoe, and (b) is a diagram. It is a figure which shows the shape after copying. It is a cross-sectional view showing the configuration of a variable capacity swash plate hydraulic motor cited as an example of a conventional swash plate hydraulic rotating machine. It is the figure which looked at the cylinder block of the variable capacity type | mold swash plate type hydraulic motor shown in FIG. 4 from the swash plate side. FIG. 5 is a cross-sectional view of a principal part showing a state in which a piston shoe of the variable displacement swash plate hydraulic motor shown in FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the swash plate type hydraulic rotating machine which concerns on this invention is demonstrated based on drawing.

  FIG. 1 is a cross-sectional view of a main part showing a retainer 12, a retainer guide 13, and a piston shoe 11 provided in a first embodiment of a swash plate type hydraulic rotating machine according to the present invention. The basic configuration of the entire hydraulic rotating machine is the same as that of the conventional variable displacement swash plate hydraulic motor shown in FIG. Only the main part is shown, and the following description will be made using the reference numerals shown in FIG. 4 as necessary.

  In the first embodiment, the familiar layer 19 is formed on the surface of the retainer 12 by chemical conversion film treatment using manganese phosphate. The actual thickness of the familiar layer 19 is about 10 μm and cannot be confirmed with the naked eye. However, for ease of explanation, the thickness dimension is exaggerated in FIGS. 2 is an enlarged cross-sectional view showing a sliding portion of the retainer 12 and the retainer guide 13 in the vicinity of the retainer guide insertion hole 12A shown in FIG. 1, and FIG. 2 (a) shows a familiar layer provided on the retainer 12. FIG. The figure which shows the shape before copying the shape of the retainer guide 13, (b) is a figure which shows the shape after copying. The diameter of the retainer guide insertion hole 12 </ b> A has a tapered shape that widens as it approaches the retainer guide 13 side. The retainer guide 13 slides at an intermediate portion with respect to the inner wall surface of the retainer guide insertion hole 12A having a tapered surface. Along with the rotation of the hydraulic motor, a conforming surface is formed on the conforming layer 19 on the surface of the retainer 12, and the shape thereof changes from FIG. 2 (a) to FIG. 2 (b).

  3 is an enlarged cross-sectional view showing a sliding portion of the retainer 12 and the piston shoe 11 in the vicinity of the inner periphery of the retainer 12 in the shoe insertion hole 12B shown in FIG. 1, and FIG. The figure which shows the shape before the accustomed layer provided in FIG. 9 imitates the shape of the piston shoe 11, (b) is a figure which shows the shape after imitating. The retainer 12 slides while pressing the shoe pad 11A of the piston shoe 11 against the swash plate 14 by the shoe presser 12C. Along with the rotation of the hydraulic motor, a conforming surface is formed on the conforming layer 19 on the surface of the retainer 12, and the shape thereof changes from FIG. 3 (a) to FIG. 3 (b).

  FIG. 6 shows the state of each member from the cylinder block 7 to the piston shoe 11 when the variable displacement swash plate hydraulic motor rotates. In FIG. 6, the familiar layer 19 is not provided in any of the retainer 12, the retainer guide 13, and the piston shoe 11, but the operation is the same as the case where the familiar layer shown in the first embodiment is provided. Here, as shown in FIG. 6, a centrifugal force acts on the rotational center 4 on the radially outer side of the cylinder block 7 on the center of gravity 11 </ b> B of the piston shoe 11 that rotates about the rotational shaft 4. The center of gravity 11B of the piston shoe 11 is located closer to the shoe pad 11A than the ball center 11C of the piston shoe 11 that is rotatably fitted to the piston 10 due to the mass of the shoe pad 11A. For this reason, the centrifugal force tries to rotate the shoe pad 11A outward in the radial direction of the cylinder block 7 with the ball center 11C as the rotation center, so that the shoe pad 11A floats radially outward from the swash plate 14, It tends to hit. Further, since the retainer guide 13 biased by the spring 17 biases the inner wall surface of the retainer guide insertion hole 12A of the retainer 12, the outer peripheral portion of the retainer 12 is less pressed against the piston shoe 11 than the inner peripheral portion. That also encourages per piece.

  When the familiar layer 19 is provided on the retainer 12 as in the first embodiment, the shoe presser 12C near the outer periphery of the retainer 12 may temporarily contact the piston shoe 11 at the initial stage of sliding. However, as shown in FIG. 3B, the conforming surface is formed on the conforming layer 19 on the inner peripheral portion of the retainer 12, and the shoe pad 11A against the shoe presser 12C on the outer peripheral portion of the retainer 12 is formed. The lift is reduced, and the shoe presser 12C finally slides uniformly with the shoe pad 11A.

  According to the first embodiment configured as described above, the conforming layer 19 provided on the sliding surface of the retainer 12 forms a copying surface that follows the shapes of the retainer guide 13 and the piston shoe 11 that are mating members by sliding. be able to. Thereby, a sliding area increases and the contact surface pressure in a sliding surface can be reduced rapidly. That is, by forming a copying surface and reducing the contact surface pressure, it is possible to provide a swash plate type hydraulic rotating machine that prevents seizure and the like and that does not have a risk of life reduction due to wear.

  Next, a second embodiment of the swash plate type hydraulic rotating machine according to the present invention will be described. In the second embodiment, the familiar layer is formed on the retainer guide and the piston shoe by chemical conversion film treatment using manganese phosphate. In this respect, contrary to the first embodiment in which the familiar layer is formed on the retainer, the member provided with the familiar layer on each sliding surface is a counterpart member on which the retainer slides. The basic configuration of the entire hydraulic rotating machine is the same as that of the variable displacement swash plate hydraulic motor of the prior art shown in FIG. 4, and the process of forming the copying surface on the sliding surface is the same as that of the first embodiment. Since it is based on FIGS. Also in the second embodiment, since the familiar layer is provided only on the mating member that slides with the retainer, the retainer guide and the piston shoe, which are the members provided with the familiar layer, have the shape of the retainer that is a member without the familiar layer. By forming a copying surface that follows the above, the sliding area increases, and the contact surface pressure on the sliding surface can be quickly reduced. That is, by forming a copying surface and reducing the contact surface pressure, it is possible to provide a swash plate type hydraulic rotating machine that prevents seizure and the like and that does not have a risk of life reduction due to wear.

  In the case of the second embodiment, since it is necessary to perform a chemical conversion film treatment for forming a familiar layer on both the retainer guide and the piston shoe, compared to the case of performing chemical conversion film treatment on the retainer in the first embodiment, The member to be processed is doubled. For this reason, it is desirable to form a familiar layer with respect to the retainer unless there is a problem in forming the familiar layer with the retainer. In addition, it is possible to provide a familiar layer only on the retainer guide or only on the piston shoe. However, if a familiar layer is provided on only one of the retainers, there is a risk that the other member will seize due to sliding with the retainer. For this reason, it is desirable to provide a familiar layer on both sliding surfaces.

  The applicable swash plate type hydraulic rotating machine is not limited to the variable capacity type, and may be applied to a fixed capacity type hydraulic rotating machine.

DESCRIPTION OF SYMBOLS 1 Casing 2 Head casing 7 Cylinder block 7A Spring seat hole 8 Cylinder 10 Piston 11 Piston shoe 11A Shoe pad 11B Center of gravity 11C Sphere part center 12 Retainer 12A Retainer guide insertion hole 12B Shoe insertion hole 12C Shoe presser 13 Retainer guide 14 Swash plate 17 Spring 19 Familiar layer

Claims (6)

A casing, a rotating shaft provided rotatably in the casing, and a plurality of cylinders provided in the casing and spaced apart in the circumferential direction so as to rotate integrally with the rotating shaft and extending in the axial direction are formed. A cylinder block, a plurality of pistons that are reciprocally inserted into the cylinders of the cylinder block, and whose one end side in the axial direction protrudes from the cylinder, and are attached to the protruding end portions of the pistons. A piston shoe made of a material, a swash plate provided in the casing so as to face the cylinder block, and a sliding surface on which the shoes slide on the surface facing the cylinder block; It is located between each piston shoe and the protruding end of each piston, and is inserted through the rotating shaft, and is inserted through each piston shoe and pressed against the sliding surface of the swash plate. An annular flat plate retainer made of an iron-based material having a plurality of insertion holes and a retainer that is positioned between the retainer and the cylinder block and is inserted into the rotary shaft and is inserted into the inclined surface by the outer peripheral surface. In a swash plate type hydraulic rotating machine equipped with a hemispherical retainer guide made of an iron-based material that presses against a plate,
A swash plate type hydraulic rotating machine characterized in that a familiar layer having a copying surface that follows the shape of a mating member is provided on one sliding surface of the retainer and the retainer guide that slides with the retainer. A casing, a rotating shaft provided rotatably in the casing, and a plurality of cylinders provided in the casing and spaced apart in the circumferential direction so as to rotate integrally with the rotating shaft and extending in the axial direction are formed. A cylinder block, a plurality of pistons that are reciprocally inserted into the cylinders of the cylinder block, and whose one end side in the axial direction protrudes from the cylinder, and are attached to the protruding end portions of the pistons. A piston shoe made of a material, a swash plate provided in the casing so as to face the cylinder block, and a sliding surface on which the shoes slide on the surface facing the cylinder block; It is located between each piston shoe and the protruding end of each piston, and is inserted through the rotating shaft, and is inserted through each piston shoe and pressed against the sliding surface of the swash plate. An annular flat plate retainer made of an iron-based material having a plurality of insertion holes and a retainer that is positioned between the retainer and the cylinder block and is inserted into the rotary shaft and is inserted into the inclined surface by the outer peripheral surface. In a swash plate type hydraulic rotating machine equipped with a hemispherical retainer guide made of an iron-based material that presses against a plate,
A swash plate type hydraulic rotating machine, wherein a conforming layer having a copying surface that follows the shape of a mating member is provided on one sliding surface of the retainer and the piston shoe that slides with the retainer. A casing, a rotating shaft provided rotatably in the casing, and a plurality of cylinders provided in the casing and spaced apart in the circumferential direction so as to rotate integrally with the rotating shaft and extending in the axial direction are formed. A cylinder block, a plurality of pistons that are reciprocally inserted into the cylinders of the cylinder block, and whose one end side in the axial direction protrudes from the cylinder, and are attached to the protruding end portions of the pistons. A piston shoe made of a material, a swash plate provided in the casing so as to face the cylinder block, and a sliding surface on which the shoes slide on the surface facing the cylinder block; It is located between each piston shoe and the protruding end of each piston, and is inserted through the rotating shaft, and is inserted through each piston shoe and pressed against the sliding surface of the swash plate. An annular flat plate retainer made of an iron-based material having a plurality of insertion holes and a retainer that is positioned between the retainer and the cylinder block and is inserted into the rotary shaft and is inserted into the inclined surface by the outer peripheral surface. In a swash plate type hydraulic rotating machine equipped with a hemispherical retainer guide made of an iron-based material that presses against a plate,
Provided on the sliding surface of the retainer that slides with the piston shoe and the retainer guide is a conforming layer having a copying surface that follows the shape of the sliding counterpart member, and the conforming layer is provided on the retainer guide and the piston shoe. A swash plate type hydraulic rotating machine characterized by not providing a motor. In the swash plate type hydraulic rotating machine according to claim 1 or 3,
A swash plate type hydraulic rotating machine characterized in that a diameter of a retainer guide insertion hole formed in a sliding surface on the retainer that slides with the retainer guide has a tapered shape that expands toward the retainer guide side. In the swash plate type hydraulic rotating machine according to any one of claims 1 to 4,
After performing the chemical conversion film treatment on the sliding surface of the conforming layer, the sliding surface subjected to the chemical conversion film treatment forms a copying surface that follows the shape of the counterpart member by sliding with the counterpart member. A swash plate type hydraulic rotating machine characterized by that. In the swash plate type hydraulic rotating machine according to claim 5,
The swash plate type hydraulic rotating machine characterized in that the chemical conversion film treatment is a film formation treatment with manganese phosphate.

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