Patent Publication Number: US-11638976-B2

Title: Oscillating device, superfinishing device, method of manufacturing bearing, method of manufacturing vehicle, and method of manufacturing machine

Description:
TECHNICAL FIELD 
     The present invention relates to an oscillating device and a superfinishing device provided with the oscillating device. Further, the present invention relates to a method of manufacturing a bearing using the superfinishing device, and a method of manufacturing a vehicle and a machine using the bearing manufactured by the manufacturing method. 
     BACKGROUND ART 
     For example, in a superfinishing process of an inner ring raceway surface or an outer ring raceway surface of a bearing, while pressing a grindstone against the inner ring raceway surface or the outer ring raceway surface, the grindstone is oscillated and simultaneously the inner ring or the outer ring is rotated. 
     Such a process relating to a grindstone is performed using a superfinishing device provided with an oscillating device.  FIG.  14    is a perspective view illustrating a superfinishing device described in PTL 1. In the superfinishing device illustrated in the drawing, rotation of a motor  101  is transmitted to an intermediate shaft  103  through a belt  102 . A crank  106  is connected to the intermediate shaft  103  through an eccentric pin  105 , and an eccentric motion of the crank  106  is transmitted to a grindstone spindle  107 , thereby oscillating a grindstone  110  mounted on a tip arm  108  of the grindstone spindle  107 . The grindstone  110  is pressed against an inner ring raceway surface of an inner ring  111  to superfinish the inner ring raceway surface by oscillating the grindstone  110  while rotating the inner ring  111 . Further, a device for oscillating the grindstone  110  is referred to as the oscillating device. 
     CITATION LIST 
     Patent Literature 
     [PTL 1] JP-A 2006-255889 
     SUMMARY OF INVENTION 
     Technical Problem 
     The superfinishing process of an inner ring raceway surface and an outer ring raceway surface is important for improving rotation performance of a bearing and takes a considerable time. Therefore, in order to improve production efficiency of the bearing, it is necessary to shorten a process time by increasing a speed of an oscillating device for oscillating a grindstone. For increasing the speed, it is necessary to reduce weights of components of the oscillating device, so that reduction in the weights of the components has been facilitated in the related art by using an aluminum alloy and the like. However, further weight reduction is strongly desired. 
     Accordingly, an object of the present invention is to shorten a process time by further reducing weights of respective components such as a connecting rod and the like forming a connecting mechanism of an oscillating device to be incorporated in a superfinishing device to improve production efficiency of a bearing. 
     Solution to Problem 
     In order to solve the above-mentioned problems, the present invention provides an oscillating device, a superfinishing device, a method of manufacturing a bearing, a method of manufacturing a vehicle, and a method of manufacturing a machine as follows. 
     (1) An oscillating device includes: 
     a driving source; 
     an oscillating member which performs an oscillating motion; and 
     a connecting mechanism which converts a rotational motion of the driving source into an oscillating motion and transmits the oscillating motion to the oscillating member, in which 
     at least one of a part or whole of a component forming the connecting mechanism is a component made of a fiber-reinforced resin, and the component made of a fiber-reinforced resin includes a reinforced fiber and a binder resin. 
     (2) The oscillating device according to (1), in which 
     the component made of a fiber-reinforced resin includes a hollow portion made of a fiber-reinforced resin. 
     (3) The oscillating device according to (2), in which 
     the hollow portion is a tubular body formed by binding a wound material of a filament of the reinforced fiber with the binder resin. 
     (4) The oscillating device according to (1), in which 
     the component made of a fiber-reinforced resin is an assembly in which plate materials made of a fiber-reinforced resin are combined and bonded to each other. 
     (5) The oscillating device according to (4), in which 
     the plate material is a plate material in which the reinforced fiber is radially oriented outward form a center of a surface thereof. 
     (6) The oscillating device according to (1), in which 
     the connecting mechanism includes a component comprising:
         a first through hole for inserting a shaft eccentric to a rotary shaft of the driving source therethrough, and   a second through hole for connecting other components forming the connecting mechanism thereto through another shaft;       

     the component is formed by binding a wound material of the reinforced fiber with the binder resin, blocks made of the fiber-reinforced resin are inserted into openings at opposite ends of the tubular body to close the openings; and 
     the first through hole and the second through hole are formed to penetrate through the tubular body and the blocks. 
     (7) The oscillating device according to (6), in which 
     the block is a laminated body formed of thin plates made of a fiber-reinforced resin, and the through hole is formed in a direction orthogonal to a lamination direction. 
     (8) The oscillating device according to (1), in which 
     the connecting mechanism includes a holding component for holding the oscillating member, and the holding component is an assembly in which plate materials made of the fiber-reinforced resin are bonded to each other. 
     (9) The oscillating device according to (1), in which 
     the connecting mechanism includes a holding component for holding the oscillating member, and a part or whole of a component forming the holding component is a tubular body formed by binding a wound material of a filament of the reinforced fiber with the binder resin. 
     (10) The oscillating device according to (1), in which 
     at least a portion where the filament of the reinforced fiber is exposed includes a coating layer made of a silicone resin. 
     (11) The oscillating device according to (1), in which 
     the connecting mechanism includes a component provided with a tubular body made of a fiber-reinforced resin, 
     a block made of a fiber-reinforced resin is inserted into an opening of the tubular body, and 
     a surface orthogonal to a thickness direction of a thin plate made of a fiber-reinforced resin is arranged in an end surface of the tubular body whose opening is closed by inserting the block. 
     (12) The oscillating device according to claim  1 , in which 
     the connecting mechanism includes a component provided with a tubular body made of a fiber-reinforced resin, 
     blocks made of a fiber-reinforced resin are respectively inserted into opposite ends of the tubular body, and 
     a space between the blocks inside the tubular body is hollow. 
     (13) The oscillating device according to claim  1 , in which 
     the connecting mechanism includes a component provided with a tubular body made of a fiber-reinforced resin, 
     a block formed by laminating a thin plate made of the fiber-reinforced resin is inserted into the tubular body, and 
     a lamination direction of the thin plates and an inserting direction of the blocks into the tubular body are the same. 
     (14) The oscillating device according to any one of (11) to (13), in which 
     a through hole penetrating through the tubular body and the block is formed. 
     (15) The oscillating device according to (1), in which 
     the connecting mechanism includes a component provided with a tubular body made of a fiber-reinforced resin, 
     a block made of the fiber-reinforced resin is inserted into the tubular body, a through hole penetrating through the tubular body and the block is formed, and 
     the block is a laminated body formed of thin plates made of a fiber-reinforced resin, and the through hole is formed in a direction orthogonal to a lamination direction of the thin plates. 
     (16) The oscillating device according to (13), in which 
     a cross section of the tubular body orthogonal to an axial line of the tubular body is a rectangular shape, and 
     the tubular body has a symmetrical shape in a longitudinal direction. 
     (17) The oscillating device according to (14), in which a metallic sleeve is inserted into the through hole. 
     (18) The oscillating device according to (1), in which 
     the connecting mechanism includes a component provided with a tubular body made of a fiber-reinforced resin, 
     blocks made of a fiber-reinforced resin are respectively inserted into openings at opposite ends of the tubular body, 
     through holes penetrating through the tubular body and the blocks are formed, and 
     surfaces orthogonal to a thickness direction of thin plates made of a fiber-reinforced resin are arranged in opposite end surfaces of the tubular body whose openings are closed by inserting the block. 
     (19) A superfinishing device includes the oscillating device according to (1). 
     (20) A method of manufacturing a bearing includes polishing a raceway surface using the superfinishing device according to (19). 
     (21) A method of manufacturing a vehicle includes manufacturing a bearing by the method of manufacturing the bearing according to (20). 
     (22) A method of manufacturing a machine includes manufacturing a bearing by the method of manufacturing the bearing according to (20). 
     Advantageous Effects of Invention 
     According to the present invention, a part or whole of the connecting rod forming the connecting mechanism of the oscillating device used for the superfinishing device, and the like is made of a fiber-reinforced resin, thereby making it possible to achieve significant weight reduction in comparison with the case of a metallic rod in the related art. Therefore, it is possible to increase a speed of the oscillating device and further the superfinishing device, thereby dramatically improving production efficiency. 
     Further, when increasing the speed thereof, vibration and noise are reduced in comparison with the case of the metallic rod, thereby having an advantage of improving a working environment. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a perspective view illustrating one example of an oscillating device. 
         FIG.  2    is a view for describing an oscillatory motion of a grindstone. 
         FIG.  3 A  is a perspective view illustrating a connecting rod formed by laminating thin plates made of a fiber-reinforced resin and  FIG.  3 B  is a schematic view for describing an orientation direction of a reinforced fiber. 
         FIG.  4    is a view in which a cavity is formed in the connecting rod of  FIGS.  3 A and  3 B . 
         FIG.  5 A  is an exploded perspective view illustrating the connecting rod provided with a rectangular tubular part made of a fiber-reinforced resin, and  FIGS.  5 B and  5 C  are schematic views for describing a lamination style of thin plates in a block. 
         FIG.  6 A  is an exploded perspective view illustrating the connecting rod provided with the rectangular tubular part made of a fiber-reinforced resin, and  FIGS.  6 B and  6 C  are schematic views for describing the lamination style of the thin plates in the block. 
         FIG.  7    is a perspective view illustrating a whole structure of a grindstone holder. 
         FIGS.  8 A to  8 E  illustrate an assembly view of the grindstone holder in  FIG.  7   . 
         FIG.  9    is a view illustrating another example of a grindstone holder and a perspective view illustrating a whole structure thereof. 
         FIGS.  10 A to  10 C  illustrate an assembly view of the grindstone holder in  FIG.  9   . 
         FIG.  11    is a perspective view illustrating another example of a grindstone holder. 
         FIG.  12 A  is a perspective view illustrating one example of a connecting shaft and  FIG.  12 B  is a cross sectional view thereof. 
         FIG.  13 A  is a perspective view illustrating another example of a connecting shaft and  FIG.  13 B  is a cross sectional view thereof. 
         FIG.  14    is a perspective view illustrating a superfinishing device described in PTL 1. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, the present invention will be described in detail with reference to the drawings. 
       FIG.  1    is a perspective view illustrating one example of an oscillating device, and the oscillating device forms a part of a superfinishing device. The oscillating device illustrated in the drawing includes a motor not illustrated in the drawing and serving as a driving source, an intermediate shaft spindle  1 , a connecting rod  10 , a connecting arm  20 , a connecting shaft  30 , a grindstone holder  40 , and a pressurizing cylinder  47  mounted on the grindstone holder  40 . 
     Further, a grindstone  50  is mounted on the grindstone holder  40 , and the grindstone  50  and a device for oscillating the grindstone  50  while pressing the grindstone against a workpiece (in this case, an outer ring raceway surface of an outer ring  60 ) to be processed and are called as a superfinishing device. As illustrated in  FIG.  2   , a tip  51  of the grindstone  50  is pressed against an outer ring raceway surface  61  of the outer ring  60 , and this pressing is performed in such a manner that a lower end part (not illustrated) of a pressurizing member mounted on the pressurizing cylinder  47  presses a pressurizing lever  90  held in a pressurizing lever holder  80  downward in the drawing, and an upper end of the grindstone  50  is pressed by a tip of the pressurizing lever  90 . The grindstone  50  is oscillated in an X direction in  FIG.  1    by the oscillating device which will be described later. Then, while the tip  51  is pressed against the outer ring raceway surface  61 , a reciprocating motion is performed to the right and left in the drawing in a circular arc shape along a groove shape of the outer ring raceway surface  61 . On the other hand, the outer ring  60  rotates in a circumferential direction, and the outer ring raceway surface  61  is polished by the oscillating grindstone  50 . 
     When describing respective components forming the oscillating device in detail, the rotation from the motor as the driving source is transmitted to the intermediate shaft spindle  1  through a belt V. The connecting rod  10  for performing an eccentric motion with a rotary shaft of the intermediate shaft spindle  1  is mounted on the intermediate shaft spindle through a shaft  2 . As illustrated in  FIGS.  3 A to  5 C , the connecting rod  10  includes a first through hole  11  for inserting the shaft  2  and a second through hole  12  for inserting a shaft  21  for being connected to a connecting arm  20 , and bearings (not illustrated) are inserted into the respective through holes  11  and  12 . 
     The shaft  21  for being connected to the connecting rod  10  is inserted into a through hole  25  in the connecting arm  20 . Further, the connecting shaft  30  is mounted on the connecting arm  20  so as to extend to a side of the grindstone holder  40  in parallel with the shaft  21 . Additionally, the grindstone holder  40  is mounted on a tip of the connecting shaft  30 . 
     Then, the connecting rod  10  performs the eccentric motion with respect to an axis of the intermediate shaft spindle  1  by the rotation of the motor, and the shaft  21  of the connecting arm  20  connected to the connecting rod  10  oscillates around an axial line of the connecting shaft  30 . Therefore, the connecting shaft  30  is reciprocally rotated centering on the axial line at a predetermined angle in the X direction illustrated in the drawing. The grindstone holder  40  is also reciprocally rotated in the same direction in accordance with the reciprocating rotation of the connecting shaft  30 , and the grindstone  50  is finally reciprocated in the same direction, thereby performing oscillation as illustrated in  FIG.  2   . 
     In the present invention, a portion formed by the connecting rod  10 , the connecting arm  20 , the connecting shaft  30 , and the grindstone holder  40  is referred to as a “connecting mechanism”. Then, at least one, and desirably, all of the connecting rod  10 , the connecting arm  20 , the connecting shaft  30 , and the grindstone holder  40  forming the connecting mechanism is made of a fiber-reinforced resin including a reinforced fiber and a binder resin. Even though these components have been made of metal so far, it is possible to dramatically achieve weight reduction by the components made of the fiber-reinforced resin, thereby making it possible to drive at a high speed. Further, even though the driving is performed at the high speed, vibration, noise, and the like are lower than those made of metal, thereby greatly improving a working environment. 
     Further, it is desirable that all of these components are made of the fiber-reinforced resin, however, in consideration of strength, it is also possible to change a part of the components to another material such as metal, and the like. Additionally, a ratio between a portion made of the fiber-reinforced resin and a portion made of another material is arbitrary, and the ratio therebetween is appropriately set in consideration of the weight reduction and the strength according to the parts. 
     Particularly, the high speed of the connecting rod  10  leads to the high speed of the oscillation of the grindstone holder  40 , thereby increasing an effect of the weight reduction. Further, even in the superfinishing device provided with the oscillating device, an oscillating motion of the grindstone  50  can be performed with the high speed, thereby contributing to shortening a process time. 
     A case where the connecting rod  10  is made of the fiber-reinforced resin will be described with reference to  FIGS.  3 A to  5 C . For the convenience of description, a connecting rod illustrated in  FIGS.  3 A and  3 B  is defined as  10 A, a connecting rod illustrated in  FIG.  4    is defined as  10 B, and a connecting rod illustrated in  FIG.  5 A  is defined as  10 C. Further, in the connecting rods  10 A to  10 C, sleeves  15  and  16  made of metal such as aluminum, and the like are fitted thereinto and integrated therewith in order to fit bearings (not illustrated) into the first through hole  11  for being connected to the intermediate shaft spindle  1  and the second through hole  12  for being connected to the connecting arm  20 . It is possible to improve the smoothness of the surface by forming the sleeves  15  and  16  with a metallic surface rather than forming inner peripheral surfaces of the first and second through holes  11  and  12  as the surfaces of the fiber-reinforced resin. Further, since an outer ring of the bearing is press-fitted, the metallic sleeves  15  and  16  are more superior in strength. 
     The connecting rod  10 A illustrated in  FIG.  3 A  has a configuration in which a plurality of thin plates  10   a  made of the fiber-reinforced resin are laminated; the thin plates are bonded to each other to form a prismatic column having a predetermined thickness; and the first through hole  11  and the second through hole  12  are opened, whereby the sleeves  15  and  16  are inserted thereinto. Even though an orientation direction of the reinforced fiber is schematically illustrated in  FIG.  3 B , it is desirable to orient the reinforced fiber radially outward from a center of the surface in consideration of strength. In this oriented state, the reinforced fiber is oriented in a radial direction of the through holes  11  and  12 . 
     In addition to radially orienting the reinforced fiber, the thin plates  10   a  in which the reinforced fibers are oriented in one direction may be laminated by being intersected with each other at upper and lower layers at a predetermined angle (for example, 45° or) 90°. 
     Further, even in the descriptions hereinafter, it is desirable that the orientation direction of the reinforced fiber in the thin plate  10   a  made of the fiber-reinforced resin is the orientation illustrated in  FIG.  3 B . 
     A weight of the connecting rod  10 A made of the fiber-reinforced resin can be about 40% reduced in comparison with that of a connecting rod made of aluminum of the same shape. 
     The connecting rod  10 B illustrated in  FIG.  4    is formed by providing a cavity  17  between the through holes  11  and  12  with respect to the connecting rod  10 A illustrated in  FIG.  3 A , thereby further achieving weight reduction by the extent of the cavity  17 . Further, an opening area of the cavity  17 , the number thereof, and a formation position thereof are appropriately set in consideration of the strength of the connecting rod  10 B. 
     The connecting rod  10 C illustrated in  FIG.  5 A  has a configuration in which blocks  18  and  19  made of the fiber-reinforced resin are inserted into openings at opposite ends of a rectangular tubular part  10 ′ in which the first through hole  11  and the second through hole  12  are opened, thereby closing the openings thereof. The rectangular tubular part  10 ′ is formed by boring the first through hole  11  and the second through hole  12  in a wound material around which a thin plate made of the fiber-reinforced resin is wound. Further, a configuration of the rectangular tubular part  10 ′ is not limited thereto, for example, a filament made of a reinforced fiber which is impregnated with the binder resin is wound a number of times along a longitudinal direction of a prism-shaped core material, and the binder resin is cured, after which the core material is pulled out and molded, and the first through hole  11  and the second through hole  12  may be bored. The blocks  18  and  19  made of the fiber-reinforced resin are members formed in block shapes by laminating the thin plates made of the fiber-reinforced resin. In the connecting rod  10 C, the rectangular tubular part  10 ′ made of the fiber-reinforced resin is hollow, and the weight can be further reduced in comparison with the connecting rod  10 B illustrated in  FIG.  4   . Further, the rectangular tubular part  10 ′ is reinforced by the blocks  18  and  19 , thereby having no problem in consideration of the strength. Further, the blocks  18  and  19  are laminated with the thin plates  10   a , and a form of laminating the thin plates  10   a  in an inserting direction of the blocks  18  and  19  as illustrated in  FIG.  5 C  is more desirable than a form of laminating the thin plates  10   a  in a direction orthogonal to the inserting direction of the blocks  18  and  19  as illustrated in  FIG.  5 B . In the case of a lamination style illustrated in  FIG.  5 B , when the openings of the connecting rod  10 C are closed with the blocks  18  and  19 , end surfaces of the connecting rod  10  are laminated surfaces of the thin plates  10   a . On the other hand, in the case of a lamination style illustrated in  FIG.  5 C , end surfaces of the connecting rod  10  are surfaces of the thin plates  10   a . In the superfinishing device provided with the oscillating device, cooling water and processing oil are often applied to the device, and the thin plate  10   a  made of the fiber-reinforced resin results in swelling caused by water absorption and oil absorption at a thickness portion (end surface) where the reinforced fiber is exposed. Therefore, when laminated surfaces of the blocks  18  and  19  are exposed to the end surfaces of the connecting rod  10 C as illustrated in  FIG.  5 B , the end surfaces thereof swell. On the other hand, in  FIG.  5 C , the end surfaces of the connecting rod  10 C are the surfaces of the thin plates  10   a , and since the laminated surface is surrounded by the rectangular tubular part  10 ′, the swelling of the blocks  18  and  19  can be suppressed. 
     Further, as illustrated in  FIGS.  6 A to  6 C , through holes  15   a  and  16   a  corresponding to the sleeves  15  and  16  may be formed in the blocks  18  and  19 . In the connecting rod  10 C, in the same manner as that of  FIGS.  5 A to  5 C , the rectangular tubular part  10 ′ made of the fiber-reinforced resin is hollow, and further weight reduction can be achieved in comparison with the connecting rod  10 B illustrated in  FIG.  4   . Further, the connecting rod  10 C is reinforced by the blocks  18  and  19 , thereby having no problem in consideration of the strength. 
     The blocks  18  and  19  illustrated in  FIG.  6 A  are formed by laminating the thin plates  10   a , and a lamination style in which a through hole  15   a  ( 16   a ) is formed on the end surface (laminated surface) of the laminated thin plates  10   a  as illustrated in  FIG.  6 C  is more desirable than a lamination style in which the through hole  15   a  ( 16   a ) is formed on the surface of the laminated thin plates  10   a  as illustrated in  FIG.  6 B . That is,  FIG.  6 B  illustrates a case where the through hole  15   a  ( 16   a ) is formed along a lamination direction,  FIG.  6 C  illustrates a case where the through hole  15   a  ( 16   a ) is formed along a direction orthogonal to the lamination direction, and it is desirable that the through hole  15   a  ( 16   a ) is formed along the direction orthogonal to the lamination direction. In the case of the lamination style illustrated in  FIG.  6 B , when the openings of the connecting rod  10 C are closed with the blocks  18  and  19 , the end surfaces of the connecting rod  10  are the laminated surfaces of the thin plates  10   a . On the other hand, in the case of the lamination style illustrated in  FIG.  6 C , the end surfaces of the connecting rod  10  are the surfaces of the thin plates  10   a . In the superfinishing device provided with the oscillating device, the cooling water and the processing oil are often applied to the device, and the thin plate  10   a  made of the fiber-reinforced resin results in the swelling caused by the water absorption and the oil absorption at the thickness portion (the end surface) where the reinforced fiber is exposed. Therefore, when the laminated surfaces of the blocks  18  and  19  are exposed to the end surfaces of the connecting rod  10 C as illustrated in  FIG.  6 B , the end surfaces thereof swell. On the other hand, in  FIG.  6 C , the end surfaces of the connecting rod  10 C are the surfaces of the thin plates  10   a , and since the laminated surface is surrounded by the rectangular tubular part  10 ′, the swelling of the blocks  18  and  19  can be suppressed. 
     Further, the surfaces of the connecting rods  10 A to  10 C can also be coated with a silicone resin as a countermeasure against the swelling caused by the cooling water and the processing oil. 
     Further, in the same manner as that of the connecting rod  10 , the connecting arm  20  also has the through hole (Reference sign  25  in  FIG.  1   ) through which a shaft for being respectively connected to the connecting rod  10  and the connecting shaft  30  is inserted in a rectangular main body portion. Although not illustrated, the connecting arm  20  can be made of the fiber-reinforced resin same as those of the connecting rods  10 A to  10 C. 
     Further, the grindstone holder  40  can be made of the fiber-reinforced resin. As illustrated in  FIG.  7   , the grindstone holder  40  extends first and second arms  42  and  45  from a mounting plate  41  for being mounted on the connecting shaft  30 , and the pressurizing cylinder  47  is mounted on the tips of the arms  42  and  45 . A block made of the fiber-reinforced resin can be subjected to cutting to be formed into a shape illustrated in the drawing, however, a method, in which respective components such as the mounting plate  41 , and the like are formed of a plate material which is made of the fiber-reinforced resin, and are joined with each other with an adhesive, a bolt, and the like, thereby being assembled, is simple and desirable. Further, the plate material is formed by laminating the thin plates, thereby being integrated, and a thickness direction of the plate material is a lamination direction. Further, as illustrated in  FIG.  3 B , it is desirable that the orientation of the reinforced fiber is also radially oriented outward from the center of the surface. 
       FIGS.  8 A to  8 E  illustrate one example of an assembly method, and as illustrated in  FIG.  8 A , the plate material made of the fiber-reinforced resin is manufactured and cut out into a shape of the mounting plate  41 . 
     Next, as illustrated in  FIG.  8 B , the first arm  42  is joined to a plate thickness portion of the mounting plate  41  so as to be perpendicular to the mounting plate  41 . The first arm  42  is the plate material made of the fiber-reinforced resin and is cut out into a predetermined shape. 
     Next, as illustrated in  FIG.  8 C , a bottom plate  43  is joined to both inner side spaces of the mounting plate  41  and the first arm  42 . The bottom plate  43  is the plate material made of the fiber-reinforced resin, and an oil-discharge hole  44  for flowing down and discharging the processing oil is opened at a center part. 
     Next, as illustrated in  FIG.  8 D , the second arm  45  is disposed to be opposite to the first arm  42 , and is joined to the mounting plate  41  and the bottom plate  43 . The second arm  45  is the plate material made of the fiber-reinforced resin and is cut out into a predetermined shape. 
     As illustrated in  FIG.  8 E , a cylinder mounting plate  46  for mounting the pressurizing cylinder  47  is joined to respective tips of the first arm  42 , the second arm  45 , and the bottom plate  43 . The cylinder mounting plate  46  is the plate material made of the fiber-reinforced resin and is cut out into a predetermined shape. 
     Further, as illustrated in  FIG.  7   , an insertion hole  48  for inserting a pressurizing piston (not illustrated) is formed in the pressurizing cylinder  47 . In the present invention, the pressurizing cylinder  47  can also be made of the fiber-reinforced resin. In this case, the block made of the fiber-reinforced resin may be subjected to cutting, but it is desirable that a plurality of the plate materials made of the fiber-reinforced resin are laminated in an axial direction of the insertion hole  48  to form the insertion hole  48 . Further, a sleeve (not illustrated) made of metal such as aluminum, and the like may be fitted into the insertion hole  48 . 
     The grindstone holder  40  may be formed as illustrated in  FIG.  9   . The grindstone holder  40  illustrated in  FIG.  9    is formed by replacing the first arm  42 , the second arm  45 , and the bottom plate  43  of the grindstone holder illustrated in  FIG.  7    with a tubular body  49 . The tubular body  49  is formed by winding a filament made of the reinforced fiber which is impregnated with the binder resin a number of times along the longitudinal direction of the prism-shaped core material, and the binder resin is cured, after which the core material is pulled out and formed into a rectangular tubular shape. Further, the mounting plate  41 , the cylinder mounting plate  46 , and the pressurizing cylinder  47  are fiber-reinforced resin members same as the grindstone holder  40  illustrated in  FIG.  7   . 
     The grindstone holder  40  illustrated in  FIG.  9    is assembled as illustrated in  FIGS.  10 A to  10 C . First, as illustrated in  FIGS.  10 A and  10 B , the tubular body  49  is joined to a front surface of the mounting plate  41 . After that, as illustrated in  FIG.  10 C , the cylinder mounting plate  46  is joined so as to close the opening of the tubular body  49 . Then, the pressurizing cylinder  47  is mounted on the cylinder mounting plate  46 , thereby completing the grindstone holder  40 . 
     Since all of the grindstone holders  40  illustrated in  FIGS.  7  and  9    are made of the fiber-reinforced resin members, the grindstone holders are lightweight but have high strength, thereby making it possible to be oscillated at a higher speed and improve process efficiency. 
     Further, the grindstone holders  40  illustrated in  FIGS.  7  and  9    are assembled by bonding the plate materials made of the fiber-reinforced resins to each other by using an adhesive, however, since the grindstone holders  40  receive vibration, there exists a concern that the strength may deteriorate at a bonded portion. Therefore, it is desirable to manufacture the grindstone holder  40  by integral molding in order to increase the strength of the bonded portion. For example, as illustrated in  FIG.  11   , the melt of a resin composition including the reinforced fiber and the binder resin is injected into a mold having a cavity of a shape in which four sides of the bottom plate  43  illustrated in  FIGS.  7  to  8 E  are surrounded by peripheral walls, and then is cured, thereby making it possible to manufacture the integrated grindstone holder  40 . In the grindstone holder  40  acquired by the integral molding, as illustrated in the drawings, a horizontal plate  43   a  corresponding to the bottom plate  43  is disposed approximately at a center in a height direction, and a cuboid-shaped space is formed on top and bottom surfaces of the horizontal plate  43   a , wherein a peripheral wall  41   a  corresponds to the mounting plate  41 , a peripheral wall  42   a  corresponds to the first arm  42 , a peripheral wall  45   a  corresponds to the second arm  45 , and a peripheral wall  46   a  corresponds to the cylinder mounting plate  46  respectively to surround the four sides of the horizontal plate  43   a.    
     The connecting shaft  30  can be wholly made of the fiber-reinforced resin, however, since the reinforced fiber has insufficient wear resistance, the connecting shaft  30  slides at connecting portions with the connecting arm  20  (refer to  FIG.  1   ) and the mounting plate  41  (refer to  FIG.  7   ) of the grindstone holder  40 , and is easily worn out thereat. Here, as illustrated in  FIGS.  12 A to  13 B , opposite ends  31  in a longitudinal direction serving as sliding portions may be made of metal, and a part  32  therebetween may be made of the fiber-reinforced resin. In  FIGS.  12 A and  12 B , a tubular body made of metal is prepared, the opposite ends  31  of the outer peripheral surface thereof are left as long as lengths corresponding to the connecting portions with the connecting arm  20  and the mounting plate  41  of the grindstone holder  40 , a recess (Reference sign  32 ) having the same depth is provided therebetween, and the recess is filled with the reinforced fiber resin. In this case, the tubular body is manufactured by insert molding using a metallic tubular body as a core. 
     Further, in  FIGS.  13 A and  13 B , annular members (Reference sign  31 ) made of metal, in which recessed parts matching thickness of a tubular body made of the fiber-reinforced resin are formed on an outer peripheral surface, are fitted to opposite ends of the tubular body made of the fiber-reinforced resin corresponding to the part  32 , and are integrated with each other by using an adhesive. 
     There are no limitations on the reinforced fiber and the binder resin in the fiber-reinforced resin forming the above-mentioned respective members, however, as the reinforced fiber, it is desirable to be lightweight and to have a high tensile strength. For example, a carbon fiber, a polyamide fiber, a boron fiber, a polyarylate fiber, a polyparaphenylene benzoxazole fiber, an ultrahigh molecular weight polyethylene fiber, and the like are suitable, and those fibers can also be mixed with each other and can be used. Particularly, the carbon fiber is desirable. Further, the reinforced fiber may be surface-treated with a sizing agent such as a urethane resin, an epoxy resin, an acrylic resin, a bismaleimide resin, and the like in order to improve adhesiveness with the binder resin. 
     There is no limitation on an average diameter of the reinforced fiber, but when the reinforced fiber becomes too thin, the strength per one reinforced fiber is not sufficient. On the other hand, when the reinforced fiber becomes too thick, even though the strength per one reinforced fiber is increased, surface properties of a component and a part made of the acquired fiber-reinforced resin deteriorate. 
     As the binder resin, an epoxy resin, a bismaleimide resin, a polyamide resin, a phenolic resin, and the like can be used, and the binder resin is selected in consideration of the adhesiveness with the reinforced fiber. For example, in the case of the carbon fiber, the epoxy resin can be used. Further, a coating amount of the binder resin or an impregnation amount thereof is not limited, but when the amount of the binder resin is too small, the binding of the reinforced fiber is not sufficient, on the other hand, when the amount of the binder resin is too large, the amount of the fiber is too small, thereby not acquiring the sufficient strength. 
     In this manner, the oscillating device in which respective parts are made of the fiber-reinforced resin reduces noise as the weight thereof is reduced. In the measurement by a vibration measuring device, a vibration value is reduced in comparison with the oscillating device using metallic components, and noise reduction can be actually realized even in an auditory sense. 
     As described above, the exemplary embodiments of the present invention are described, however, the present invention is not basically limited to a type and a configuration of the oscillating device itself and can be applied to various oscillating devices other than the oscillating device illustrated in  FIG.  1   . Of course, the present invention can also be applied to the oscillating device incorporated in the superfinishing device illustrated in  FIG.  14   , and for example, the crank  106 , and the like can be made of the fiber-reinforced resin. 
     Further, even in the superfinishing device, the pressurizing piston to be inserted into the insertion hole  48  of the pressurizing cylinder  47  may be integrated by bonding a disk made of the fiber-reinforced resin to upper and lower end surfaces of a cylinder made of the fiber-reinforced resin. Further, the pressurizing lever holder  80  can also be made of the fiber-reinforced resin. It is possible to achieve the weight reduction of the superfinishing device as a whole in addition to the oscillating device by making those components with the fiber-reinforced resin. 
     The bearing can be manufactured by polishing the raceway surface using the above-mentioned superfinishing device, however, the present invention also includes a method of manufacturing the bearing including such a process of processing a raceway surface as the scope of the present invention. 
     Further, the present invention also includes a method of manufacturing a vehicle or various machines including manufacturing a bearing by the above-mentioned method of manufacturing the bearing as the scope of the present invention. Further, the machine includes a machine operated by human power as well as electric power. 
     While the invention has been described in detail with reference to specific embodiments, it will be apparent to these skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. This application is based on JP-A-2017-127207 filed on Jun. 29, 2017, and JP-A-2017-216414 filed on Nov. 9, 2017, the contents of which are incorporated herein by reference. 
     INDUSTRIAL APPLICABILITY 
     The present invention is a technology useful for shortening a process time, and further improving productivity of a bearing by reducing the weight of an oscillating device. 
     REFERENCE SIGNS LIST 
     
         
           1  intermediate shaft spindle 
           10  connecting rod 
           11  first through hole 
           12  second through hole 
           15 ,  16  sleeves 
           18 ,  19  blocks 
           20  connecting arm 
           30  connecting shaft 
           40  grindstone holder 
           41  mounting plate 
           42  first arm 
           43  bottom plate 
           44  oil-discharge hole 
           45  second arm 
           46  cylinder mounting plate 
           47  pressurizing cylinder 
           48  insertion hole 
           49  tubular body 
           50  grindstone 
           60  outer ring 
           80  pressurizing lever holder 
           90  pressurizing lever