JP2008128006A - Variable displacement swash plate pump motor bearing holding device, and variable displacement swash plate pump motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a variable displacement swash plate pump motor bearing holding device enabling the improvement of the assemblability, and a variable displacement swash plate pump motor. <P>SOLUTION: A swash plate 16 and a link member 41 are engaged with each other at a first projection 46 projecting from the swash plate 16 and a first groove 42 formed in the link member 41. A guide part 23 and the link member 41 are engaged with each other at a second projection 49 projecting from the guide part 23 and a second groove formed in the link member 41. The link member 41 is rotatably supported on a retainer 28 by a rotating shaft 45 projecting from the retainer 28 of a bearing 25 and a shaft insertion part 44 formed in the link member 41. The first projection 46, the second projection 49, and the rotating shaft 45 are arranged parallel to each other in the direction parallel to the axial direction of the rotating shaft of a pump motor, and extend in the direction perpendicular to the axial direction. The position of the shaft insertion part 44 is so set that the center of gravity of the link member 41 is biased to the second groove 43 side of the first groove 42. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a variable capacity swash plate pump motor in which a bearing built in between a swash plate and a guide portion for guiding the tilt of the swash plate is supported so as to follow the tilt of the swash plate. The present invention relates to a bearing holding device and a variable displacement swash plate pump motor.

  A conventional bearing holding device for a variable displacement swash plate pump / motor will be described with reference to FIG. FIG. 7 is a view showing a link member in the prior art and an engagement structure of the link member with a guide portion, a swash plate, and a bearing.

  In FIG. 7, reference numeral 16 denotes a swash plate having a convex curved surface 22 having a circular cross section. Reference numeral 23 denotes a guide portion having a concave curved surface 24 having a circular cross section and facing the convex curved surface 22. Reference numeral 25 denotes a bearing provided between the convex curved surface 22 and the concave curved surface 24. The bearing 25 includes an outer ring 26 fixed to the concave curved surface 24, a plurality of rolling elements 27 arranged in an arc shape between the outer ring 26 and the convex curved surface 22, and a cage that holds the plurality of rolling elements 27. 28. The swash plate 16, the guide portion 23, and the bearing 25 are components of a variable displacement swash plate pump / motor.

  The conventional bearing holding device includes a link member 100 that causes the cage 28 of the bearing 25 to follow the tilt of the swash plate 16 along the concave curved surface 24.

  The swash plate 16 is provided with a protrusion 110. The link member 100 is provided with a groove 101, and a protruding portion 110 is inserted into the groove 101.

  The guide portion 23 is provided with a rotating shaft 111 made of a pin having a head portion 111a. A shaft hole 112 is provided in the link member 100, and a rotation shaft 111 is inserted into the shaft hole 112.

  A protrusion 113 is provided on the cage 28 of the bearing 25. A groove 102 is provided at the center of the bottom of the groove 101 of the link member 100, and a protruding portion 113 is inserted into the groove 102.

The conventional bearing holding device shown in FIG.
JP 2001-349288 A

  By the way, in some variable displacement swash plate pumps and motors, a housing and a guide portion that form an outer shell thereof are an integral member. This type of housing forms most of the space for storing the components of the variable displacement swash plate pump and motor, and is provided with an opening for assembling these components into the housing body. A housing main body and a lid fixed to the housing main body in a state where the opening is closed. The guide part is integrated with the housing body of the housing body and the lid.

  In the variable displacement swash plate pump / motor having such a housing, the swash plate and the bearing are incorporated into the housing body because the housing body integrated with the guide portion is a metal lump and is heavy. (1) Guide Place the housing body on the workbench or the like so that the concave surface of the part faces upwards. (2) Insert the outer ring of the bearing into the housing body through the opening and fix it to the concave surface of the guide part. (3) Place the bearing retainer holding the rolling elements on the outer ring, and (4) place the swash plate with the convex curved surface facing downward into the housing body through the opening and place it on the bearing retainer. The procedure is to do.

  When the link member is attached together with the swash plate and the bearing in the housing main body, in the above-described conventional bearing device, the guide shaft 23 and the link member 100 are attached to the guide portion 23, and then the guide portion 23. The bearing 25 is assembled to the above. At this time, it is necessary to support the link member 100 so that the posture of the link member 100 is held in a posture in which the groove 102 of the link member 100 faces the direction of the protruding portion 113 of the retainer 28 of the bearing 25. Supporting the link member 100 in this manner is difficult to perform because the space around the guide portion 23 and the bearing 25 is covered by the inner wall of the housing body, and movement of hands and fingers is restricted to the inner wall.

  The present invention has been made in view of the above-described prior art, and an object of the present invention is to provide a variable capacity swash plate pump / motor bearing holding device capable of improving assemblability.

  To achieve the above object, the present invention is configured as follows.

[1] A bearing holding device for a variable capacity swash plate pump / motor according to the present invention has a swash plate having a convex curved surface with an arc-shaped section and a concave curved surface having an arc-shaped section facing the convex curved surface. A guide portion; and a bearing provided between the convex curved surface and the concave curved surface, wherein the bearing has an outer ring fixed to the concave curved surface, and an arc shape between the outer ring and the convex curved surface. A variable displacement swash plate pump motor having a plurality of rolling elements arranged in a row and a cage holding the plurality of rolling elements, wherein the swash plate is tilted along the concave curved surface. In the bearing holding device having a link member that follows the bearing cage, a first rod-like protrusion protruding from the swash plate, and a first protrusion provided on the link member and inserted with the first protrusion. Groove and rod shape protruding from the guide A second protrusion, a second groove provided in the link member, into which the second protrusion is inserted, a rotation shaft protruding from one of the cage and the link member, and the other provided on the other A rotary shaft of the variable capacity swash plate pump motor, the rotary shaft of the variable capacity swash plate pump motor having a circular shaft insertion portion into which the rotary shaft is inserted. The first projecting portion, the second projecting portion, and the rotating shaft extend in a direction perpendicular to the axial direction, and are provided on the link member. The position of the rotation shaft or the shaft insertion portion is a position that biases the center of gravity of the link member toward the second groove rather than the first groove.

  In the present invention configured as described above, the position of the rotation shaft or the shaft insertion portion provided in the link member is a position that deviates the center of gravity of the link member toward the second groove rather than the first groove. As a result, in a state in which the link member is rotatably supported by the rotation shaft and the shaft insertion portion with respect to the bearing retainer, the posture of the link member is such that the first groove faces up and the second groove faces down. Stabilizes in a facing posture.

  When the bearing is assembled to the guide portion in the procedure described in the section of “[Problems to be Solved by the Invention]”, before the bearing retainer is placed on the outer ring of the bearing fixed to the guide portion, the link member is The rotating shaft and the shaft insertion portion are supported so as to be rotatable with respect to the bearing holder. As a result, when the bearing retainer is placed on the outer ring of the bearing, the posture of the link member is naturally stabilized with the first groove facing up and the second groove facing down. However, it is not necessary to support the link member so as to be held in a posture facing the direction of the second protrusion. As a result, the assemblability of the bearing holding device of the variable displacement swash plate pump / motor can be improved.

[2] The present invention is the invention described in “[1]”, wherein the first protrusion is the first rod-shaped body in which one end is inserted into a first hole provided in the swash plate. The second projecting portion is a portion on the other end side projecting from the first hole, and the second projecting portion is from the second hole in the second rod-shaped body having one end inserted into the second hole provided in the guide portion. A portion on the other end side that protrudes, and a portion on the other end side of one of the first and second rod-like bodies penetrates a corresponding one of the first and second grooves. A link member restricting portion for restricting movement of the link member in a direction of coming out from the other end of the one rod-like body is provided on a peripheral side surface of the portion on the other end side that protrudes from the one groove. The link member includes the other rod-shaped body in the protruding direction of the other rod-shaped body of the first and second rod-shaped bodies. On the long line, there is provided a counter rod-shaped body regulating portion that regulates movement of the other rod-shaped body in the direction of coming out of the corresponding one of the first and second holes. And

[3] The present invention is the invention described in “[2]”, wherein the rotating shaft is the third hole of the rod-shaped body having one end inserted into a third hole provided in the cage. The link member is located on the extension line of the third rod-shaped body in the projecting direction of the third rod-shaped body, and the third member extends in the direction of coming out of the third hole. A counter-axis restricting portion for restricting the movement of the rod-shaped body is provided.

[4] The present invention is characterized in that, in the invention described in “[2]”, the rotating shaft is formed integrally with one of the cage and the link member. .

[5] A variable displacement swash plate pump / motor of the present invention is a variable displacement swash plate pump / motor provided with the bearing holding device according to [[1]], wherein the swash plate, the bearing, A bearing holding device and a housing that covers the guide portion are provided, and the housing and the guide portion are an integral member.

  As described above, the present invention can improve the assembly of the bearing holding device of the variable displacement swash plate pump / motor. As a result, it is possible to reduce the labor required for the assembly work of the variable displacement swash plate pump / motor and to shorten the time required for the assembly work.

  Embodiments of a bearing holding device for a variable displacement swash plate pump / motor and a variable displacement swash plate pump / motor of the present invention will be described.

<First Embodiment>
A first embodiment will be described with reference to FIGS.

  FIG. 1 is a sectional view of a variable displacement swash plate pump / motor according to a first embodiment of the present invention. FIG. 2 is a bottom view showing the link member shown on the lower side of FIG. 1 and the engagement structure between the link member and the guide portion, the swash plate, and the bearing. FIG. 3 is an enlarged cross-sectional view of the link member and the engagement structure shown on the lower side of FIG. FIG. 4 is an exploded perspective view of the guide portion, the swash plate, and the bearing. FIG. 5 is a diagram illustrating an example of a state in which the link member causes the bearing to follow the tilt of the swash plate.

  The first embodiment is a variable displacement swash plate pump 1 shown in FIG. The variable displacement swash plate pump 1 includes a housing 2 that forms an outline of the variable displacement swash plate pump 1, and a rotary shaft 8 that is supported on the housing 2 via annular bearings 9 and 10 with one end protruding from the housing 2. It has.

  The housing 2 includes a housing body 3 and a lid 5. The housing body 3 forms most of the space for storing the components of the variable displacement swash plate pump 1 and is provided with an opening 4 for assembling these components into the housing body 3. .

  In the housing body 3, a cylinder block 11 splined to the rotary shaft 8, a piston 14 slidably inserted into each of the plurality of cylinder bores 12 of the cylinder block 11, and each piston 14 protruding from the cylinder block 11. A shoe 15 coupled to the end of each shoe by a ball joint and a swash plate 16 having a smooth surface 17 in contact with each shoe 15 are stored.

  The lid 5 is provided with a suction pipe 6 and a discharge pipe 7. A valve plate 18 is interposed between the lid 5 and the cylinder block 11. The valve plate 18 is provided with a suction port 19 and a discharge port 20 for communicating the inlet / outlet 13 of the cylinder bore 12 with the suction pipe 6 and the discharge pipe 7 of the lid 5. The lid 5 is fixed to the housing body 3 with the valve plate 18 being sandwiched between the lid 5 and the opening 4 being closed.

  The variable displacement swash plate pump 1 includes a tilt angle variable mechanism 21 that makes the tilt angle of the swash plate 16 variable, and a drive mechanism 30 that drives the tilt angle variable mechanism 21.

  The tilt angle variable mechanism 21 is provided integrally with the housing body 3 and has a convex curved surface 22 with a circular arc section and a concave curved surface 24 with a circular arc section and opposed to the convex curved surface 22. And a bearing 25 provided between the convex curved surface 22 of the swash plate 16 and the concave curved surface 24 of the guide portion 23, and a bearing holding device 40 that holds the bearing 25. The bearing 25 includes an outer ring 26 fixed to the concave curved surface 24, a plurality of rolling elements 27 arranged in an arc shape between the outer ring 26 and the convex curved surface 22, and a cage 28 that holds these rolling elements 27. It has.

  The drive mechanism 30 includes a servo cylinder 31 and a transmission mechanism 34 that transmits force from the servo piston 33 to the swash plate 16.

  The servo cylinder 31 includes a cylinder bore 32 that is a cavity provided in the housing body 3 and extends in a direction orthogonal to the axial direction of the rotary shaft 8, and a servo piston 33 that is slidably inserted into the cylinder bore 32. ing.

  The transmission mechanism 34 includes an arm 36 extending from the swash plate 16, a hole 35 provided in the servo piston 33, and a hole 38 a into which the rod-shaped portion 37 is inserted. And a slider 38 interposed therebetween. The slider 38 and the hole 35 are provided so that the axial force of the servo piston 33 can be transmitted to the rod-shaped portion 37 while allowing the rod-shaped portion 37 to be displaced in a direction orthogonal to the axial direction of the servo piston 33. .

  As shown in FIG. 1, the bearing holding device 40 is provided on both sides of the swash plate 16, the guide portion 23, and the bearing 25 in a direction parallel to the tilt center line of the swash plate 16 (vertical direction in FIG. 1). A link member 41 for causing the cage 28 of the bearing 25 to follow the tilt of the swash plate 16 along the concave curved surface 24 of the guide portion 23 is provided.

  As shown in FIGS. 2 and 3, the swash plate 16 is provided with a rod-shaped first protrusion 46. The link member 41 is provided with a first groove 42, and a first protrusion 46 is inserted into the first groove 42. The first protruding portion 46 is a portion on the other end side protruding from the first hole 47 in the first rod-like body 48 having one end inserted into the first hole 47 provided in the swash plate 16.

  The guide portion 23 is provided with a rod-like second protruding portion 49. The link member 41 is provided with a second groove 43, and a second protrusion 49 is inserted into the second groove 43. The second protruding portion 49 is a portion on the other end side protruding from the second hole 50 in the second rod-shaped body 51 having one end inserted into the second hole 50 provided in the guide portion 23.

  The outer ring 26 of the bearing 25 is prevented from sliding relative to the guide portion 23 by a pin 29. The second rod 51 is provided with a pin hole 52 through which the pin 29 passes. That is, the pin 29 prevents the second rod 51 from coming off while preventing the outer ring 26 from sliding relative to the guide portion 23.

  A rotation shaft 45 projects from one of the cage 28 and the link member 41 of the bearing 25, for example, the cage 28. The link member 41 is provided with a shaft insertion portion 44 having a circular cross section, and a rotation shaft 45 is inserted into the shaft insertion portion 44. The rotation shaft 45 is provided integrally with the cage 28 of the bearing 25, for example. The shaft insertion portion 44 is, for example, a round hole that penetrates the link member 41.

  The first protrusion 46, the second protrusion 49, and the rotation shaft 45 are arranged in a direction parallel to the axial direction of the rotary shaft 8 of the variable displacement swash plate pump 1. Moreover, the 1st protrusion part 46, the 2nd protrusion part 49, and the rotating shaft 45 are each extended in the direction orthogonal to an axial direction.

  The position of the shaft insertion portion 44 provided in the link member 41 is a position where the center of gravity of the link member 41 is biased toward the second groove 43 rather than the first groove 42.

  One of the first and second rod-like bodies 48 and 51, for example, the portion on the other end side of the second rod-like body 51 penetrates the second groove 43. On the peripheral side surface of the portion on the other end side that has penetrated from the second groove 43, there is provided a counter link member restricting portion 53 that restricts the movement of the link member 41 in the direction of coming out from the other end of the second rod-shaped body 51. . The link member restricting portion 53 includes a protruding portion that protrudes in the radial direction from the peripheral side surface of the second rod-shaped body 51, for example, a flange-shaped protruding portion that is continuous in the circumferential direction of the second rod-shaped body 51.

  As described in the section “[Problems to be Solved by the Invention]”, the swash plate and the bearing 25 are incorporated into the housing body 3 because the housing body 3 integrated with the guide portion 23 is a metal lump and is heavy. As shown in FIG. 4, (1) the housing body 3 is placed on a work table or the like (not shown) so that the concave curved surface 24 of the guide portion 23 faces upward, and (2) the opening 4 (see FIG. 4). The outer ring 26 of the bearing 25 is put into the housing body 3 and fixed to the concave curved surface 24 of the guide portion 23. (3) The bearing 25 holding the rolling element 27 on the outer ring 26 of the bearing 25 Place the cage 28 and (4) place the swash plate 16 with the convex curved surface 22 facing downward into the housing body 3 through the opening 4 and place it on the cage 28 of the bearing 25. It is done in the procedure of

  When the swash plate 16 and the bearing 25 are assembled in the housing body 3 by this procedure, the link member 41 is rotated before the retainer 28 of the bearing 25 is placed on the outer ring 26 of the bearing 25 fixed to the guide portion 23. The shaft 45 and the shaft insertion portion 44 are supported so as to be rotatable with respect to the cage 28 of the bearing 25. When the cage 28 of the bearing 25 in this state is placed on the outer ring 26 of the bearing 25, the posture of the link member 41 is naturally stabilized in a posture in which the first groove 42 faces upward and the second groove 43 faces downward. Therefore, it is not necessary to support the link member 41 so that the second groove 43 is held in a posture facing the direction of the second protrusion 49.

  The first embodiment operates as follows.

  When the servo piston 33 is pressed by the pressure oil, a force for pressing the servo piston 33 is transmitted to the swash plate 16 via the arm 36. As a result, the swash plate 16 tilts while rolling the rolling elements 27 of the bearing 25.

  The force for tilting the swash plate 16 is transmitted from the swash plate 16 to the link member 41 via the first protrusion 46. The first protrusion 46 is in a state in which movement in the direction away from the bottom of the first groove 42 is allowed while being in contact with the edge of the link member 41 forming the first groove 42. The second protrusion 49 is in a state in which movement in a direction away from the bottom of the second groove 43 is allowed in a state where the second protrusion 49 is in contact with the edge of the link member 41 that forms the second groove 43. Accordingly, the link member 41 is centered on the rotation shaft 45 while sliding the cage 28 engaged by the shaft insertion portion 44 and the rotation shaft 45 in the tilting direction of the swash plate 16 with respect to the outer ring 26. To turn. As a result, the cage 28 follows the tilt of the swash plate 16.

  According to the first embodiment, the following effects can be obtained.

  In the first embodiment, at the time of assembly, when the cage 28 of the bearing 25 in a state where the link member 41 is rotatably supported is placed on the outer ring 26 of the bearing 25, the second groove 43 is the second groove 43. It is not necessary to support the link member 41 so as to be held in a posture facing the direction of the protruding portion 49. Thereby, the assembly property of the bearing holding device 40 can be improved. As a result, it is possible to reduce the labor required for the assembly work of the variable displacement swash plate pump / motor and to shorten the time required for the assembly work.

  In the first embodiment, since the second rod-shaped body 51 is prevented from being removed by the pin 29, the anti-link member restricting portion 53 is provided in the second projecting portion 49, but the present invention is limited to this. It is not something. When the first protrusion 46 is not a member different from the swash plate 16 like the first rod 48 but is a member integrated with the swash plate 16, or when the first rod 48 is prevented from coming off. Instead of the second protrusion 49, the first protrusion 46 may be provided with a link member restricting portion.

  Moreover, in 1st Embodiment, although the pair link member control part 53 consists of a brim-like protrusion part, this invention is not limited to this. The pair link member restricting portion 53 may include a plurality of projecting portions that project intermittently in the circumferential direction of the second rod-shaped body 51.

  The first embodiment is a variable displacement swash plate pump, but the present invention is not limited to a variable displacement swash plate pump, and may be a variable displacement swash plate motor.

<Second Embodiment>
A second embodiment will be described with reference to FIG. 6A and 6B are diagrams showing a link member in the second embodiment, and an engagement structure of the link member with a guide portion, a swash plate, and a bearing, wherein FIG. 6A is an enlarged cross-sectional view thereof, and FIG. Is a bottom view thereof.

  As shown in FIG. 6A, the link member 41 is located on the other rod-shaped body of the first and second rod-shaped bodies 48, 51, that is, on the extension line of the first rod-shaped body 48, and A rod-shaped body restricting portion 60 that restricts the movement of the one rod-shaped body 48 in the direction in which it is removed from the first hole 47 is provided. As shown in FIG. 6 (b), the counter rod-shaped body restricting portion 60 is composed of, for example, a flange-like protruding portion that continues along the entire inner wall surface of the first groove 42.

  As shown in FIG. 6A, a third hole 61 is provided in the cage 28 of the bearing 25. One end side of the third rod-like body 62 is inserted into the third hole 61. A portion of the third rod-like body 62 on the other end side protruding from the third hole 61 is a rotating shaft 45.

  The link member 41 is on an extension line of the third rod-like body 62 in the projecting direction of the third rod-like body 62 and restricts the movement of the third rod-like body 62 in the direction of coming out of the third hole 61. 63 is provided. The counter-axis restricting portion 63 is also composed of a flange-like projecting portion that is continuous along the entire inner wall surface of the second groove 43, for example.

  Since the configuration of the second embodiment other than the portion shown in FIG. 6 is the same as that of the first embodiment, the description thereof is omitted.

  According to the second embodiment, the following effects can be obtained.

  In the second embodiment, as in the first embodiment, when assembling, the cage 28 of the bearing 25 in a state where the link member 41 is rotatably supported is placed on the outer ring 26 of the bearing 25. It is not necessary to support the link member 41 so that the second groove 43 is held in a posture facing the direction of the second protrusion 49. Thereby, the assembly property of the bearing holding device 40 can be improved. As a result, it is possible to reduce the labor required for the assembly work of the variable displacement swash plate pump / motor and to shorten the time required for the assembly work.

  In particular, in the second embodiment, it is possible to prevent the first rod-shaped body 48 and the third rod-shaped body 62 from coming off by the link member 41 by the counter rod-shaped body restricting portion 60 and the counter shaft restricting portion 63, respectively. Thereby, in order to improve productivity, the first protrusion 46 and the rotating body 45 are respectively separated from the swash plate 16 and the retainer 28 by the first and third rod-like bodies 48 and 62, respectively. Even if it comprises, the risk of failure by the omission of these 1st, 3rd rod-shaped bodies 48 and 62 can be eliminated.

  In addition, although 2nd Embodiment is an example in which the counter rod-shaped body control part 60 and the counter shaft control part 63 consist of a flange-shaped protrusion part, this invention is not limited to this. The first rod 42 and the third rod 62 may be prevented from coming off by providing the first groove 42 and the shaft insertion portion 44 so as not to penetrate the link member 41.

It is sectional drawing of 1st Embodiment of the variable capacity | capacitance type swash plate pump motor of this invention. It is a bottom view which shows the engagement structure of the link member shown in the lower side of FIG. 1 and this link member, a guide part, a swash plate, and a bearing. It is an expanded sectional view of the link member and engagement structure which were shown on the lower side of FIG. It is a disassembled perspective view of a guide part, a swash plate, and a bearing. It is a figure which shows an example of a mode that the link member is making a bearing track the inclination of a swash plate. The link member in 2nd Embodiment and the engagement structure of this link member, a guide part, a swash plate, and a bearing are shown, Comprising: (a) is the expanded sectional view, (b) is the bottom view. It is. It is a figure which shows the engagement structure of the link member in this prior art, and this link member, a guide part, a swash plate, and a bearing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Variable displacement type | mold swash plate pump 2 Housing 3 Housing main body 4 Opening part 5 Cover body 8 Rotating shaft 16 Swash plate 21 Tilt angle variable mechanism 22 Convex surface 23 Guide part 24 Concave surface 25 Bearing 26 Outer ring 27 Rolling body 28 Cage 29 Pin 30 Drive mechanism 40 Bearing holding device 41 Link member 42 1st groove 43 2nd groove 44 Shaft insertion part 45 Rotating shaft 46 1st protrusion part 47 1st hole 48 1st rod-shaped body 49 2nd protrusion part 50 2nd hole 51 Second rod-shaped body 52 Pin hole 53 Pair-link member regulating portion 60 Pair-shaped body regulating portion 61 Third hole 62 Third rod-shaped body 63 Pair-axis regulating portion

Claims (5)

A swash plate having a convex curved surface having an arcuate cross section, a guide portion having a circular arc cross section and having a concave curved surface facing the convex curved surface, and a bearing provided between the convex curved surface and the concave curved surface. An outer ring fixed to the concave curved surface, a plurality of rolling elements arranged in an arc shape between the outer ring and the convex curved surface, and a cage that holds the plurality of rolling elements. A variable displacement swash plate pump / motor having
In the bearing holding device comprising a link member that causes the cage of the bearing to follow the tilt of the swash plate along the concave curved surface,
A rod-like first protrusion protruding from the swash plate, a first groove provided in the link member into which the first protrusion is inserted, a rod-like second protrusion protruding from the guide, and the link A second groove provided in the member into which the second projecting portion is inserted, a pivot shaft projecting from one of the cage and the link member, and a cross section in which the pivot shaft is provided on the other Has a circular shaft insertion part,
The first protrusion, the second protrusion, and the rotating shaft are arranged in a direction parallel to the axial direction of the rotary shaft of the variable displacement swash plate pump motor,
The first projecting portion, the second projecting portion, and the pivot shaft each extend in a direction orthogonal to the axial direction, and the position of the pivot shaft or the shaft insertion portion provided in the link member is
A bearing holding device for a variable capacity swash plate pump motor, characterized in that it is at a position where the center of gravity of the link member is biased to the second groove side with respect to the first groove. In the invention of claim 1,
The first protruding portion is a portion on the other end side protruding from the first hole in the first rod-like body having one end inserted into the first hole provided in the swash plate,
The second protruding portion is a portion on the other end side protruding from the second hole in the second rod-like body having one end inserted into a second hole provided in the guide portion,
The other one of the first and second rod-shaped bodies on the other end side penetrates the corresponding one of the first and second grooves and penetrates from the one groove. On the peripheral side surface of the end side portion, a pair link member restricting portion that restricts movement of the link member in a direction of coming out from the other end of the one rod-shaped body is provided,
The link member is on an extension line of the other rod-shaped body in the protruding direction of the other rod-shaped body of the first and second rod-shaped bodies, and the other rod-shaped body is the first and second holes. A rod-shaped body restricting portion that restricts movement in the direction of coming out from the corresponding hole of
A bearing holding device for a variable displacement swash plate pump and motor. In the invention of claim 2,
The rotating shaft is a portion on the other end side protruding from the third hole in the rod-like body having one end inserted into the third hole provided in the cage,
The link member is on an extension line of the third rod-shaped body in the projecting direction of the third rod-shaped body, and controls the movement of the third rod-shaped body in the direction of coming out of the third hole. A bearing holding device for a variable displacement swash plate pump / motor. In the invention of claim 2,
The bearing holding device for a variable displacement swash plate pump motor, wherein the rotating shaft is formed integrally with one of the cage and the link member.   A variable displacement swash plate pump / motor provided with a bearing holding device according to claim 1, comprising: a housing that covers the swash plate, the bearing, the bearing holding device, and the guide portion; and A variable displacement swash plate pump motor characterized in that the guide portion is an integral member.

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