JP5401519B2 - Carrier and manufacturing method thereof - Google Patents

Description

  The present invention relates to a carrier of a planetary gear mechanism and a manufacturing method thereof.

  The planetary gear mechanism includes a sun gear, a plurality of pinion gears that mesh with the sun gear, a carrier that supports the plurality of pinion gears, and a ring gear that meshes with the plurality of pinion gears. In order to support a plurality of pinion gears from both sides, the carrier needs to have two parallel surfaces.

  Patent Document 1 discloses a method for forming the two parallel surfaces by joining an annular carrier plate to a cup-shaped carrier plate by electron beam welding as a carrier manufacturing method.

JP 58-61982

  However, in the above method, it is necessary to machine the two carrier plates respectively and then join them by electron beam welding. Further, when the clutch hub or the clutch drum is provided integrally with the carrier, it is necessary to weld the separately formed clutch hub or clutch drum to the carrier by electron beam welding. For this reason, in the said method, there existed a problem that the number of parts and the number of processing processes increased, and the strength fall by joining failure was easy to be caused.

  Further, the above method has a problem that the yield of the material is poor because the opening for exposing the pinion gear needs to be processed on the side surface of the cup-shaped carrier plate.

  The present invention has been made in view of such technical problems, and reduces the number of parts and the number of processing steps necessary for manufacturing a carrier integrated with a clutch drum or a clutch hub, and improves the yield of materials. The purpose is to do.

  According to an aspect of the present invention, there is provided a method of manufacturing a carrier that supports a pinion gear of a planetary gear mechanism and is integrated with a clutch drum or a clutch hub, and includes a preparation step of preparing a disc-shaped blank, Forming a flange portion of the carrier, a cylindrical portion extending from a surface of the flange portion, and an annular rim portion extending radially outward from the flange portion; and the rim portion A bending step of alternately dividing the planned side wall portion and the planned seat surface portion in the circumferential direction and expanding the outer side in the radial direction while pushing the predetermined seat surface portion to expose the pinion gear; and the predetermined side wall portion And forming the seating surface of the pinion gear by moving the predetermined seating surface portion below the flange portion. A drawing step that method of manufacturing a carrier comprising a, a spline groove forming step of forming the spline grooves on the inner periphery or outer periphery of the tubular portion is provided.

According to another aspect of the present invention, there is provided a carrier manufacturing method that supports a pinion gear of a planetary gear mechanism and is integrated with a clutch drum or a clutch hub, and includes a preparation step of preparing a disc-shaped blank, and the blank A forging step for forming a flange portion of the carrier, a cylindrical portion extending from a surface of the flange portion, and an annular rim portion extending radially outward from the flange portion, and the rim portion The first bending step of alternately dividing the planned side wall portion and the planned seating surface portion in the circumferential direction and expanding the outer side in the radial direction while pushing the planned seating surface portion to expose the pinion gear; and The seat surface planned portion is formed on the side wall of the carrier having ribs protruding radially inward by pushing the center in the width direction of the planned side wall portion radially inward. And a second bending step of forming a seating surface of the pinion gear by moving the lower part of the flange portion, and a spline groove forming step of forming a spline groove on the inner periphery or outer periphery of the cylindrical portion. A method for producing the carrier is provided.

  According to still another aspect of the present invention, there is provided a carrier for supporting a pinion gear of a planetary gear mechanism, which is integrally formed from a single member, a flange portion, a clutch drum extending from the surface of the flange portion, or A clutch hub, a side wall extending in a direction opposite to the clutch drum or the clutch hub from the flange part, and the parallel to the flange part formed by immersing a part of the side wall in the carrier And a bearing surface of the pinion gear, wherein an opening for exposing the pinion gear is formed at an initial position of the immersed portion.

  According to these aspects, since the carrier integrated with the clutch drum or the clutch hub is integrally formed from one member, the number of parts and the number of processing steps can be reduced. Since it is not necessary to join a plurality of members, strength reduction due to poor joining is not caused. Further, since the opening formed at the initial position of the seating surface becomes an opening for exposing the pinion gear, the yield of the material is improved as compared with the case of punching the opening.

  Moreover, the strength of the carrier is improved in the aspect in which the side wall having ribs protruding radially inward is formed.

It is a perspective view of the carrier manufactured by the manufacturing method concerning a 1st embodiment of the present invention. It is the flowchart which showed the first half part of the shaping | molding procedure of a carrier. It is the flowchart which showed the second half part of the shaping | molding procedure of a carrier. It is a figure for demonstrating a 1st forge process. It is a figure for demonstrating a 2nd forge process. It is a figure for demonstrating a 2nd piercing process. It is a figure for demonstrating a bending process. It is a figure for demonstrating a 1st aperture_diaphragm | restriction process. It is a figure for demonstrating a 2nd aperture_diaphragm | squeezing process. It is a perspective view of the carrier manufactured by the manufacturing method concerning a 2nd embodiment of the present invention. It is the flowchart which showed the second half part of the shaping | molding procedure of a carrier. It is a figure for demonstrating a 1st bending process. It is a figure for demonstrating a 1st bending process. It is a figure for demonstrating a 2nd bending process. It is a figure for demonstrating a 2nd bending process.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the positional relationship of each member will be described based on the vertical relationship in the figure, but the vertical relationship in the following description is only for explanatory purposes, and each vertical relationship in molding or use It does not require that the member be placed. Further, a member in the middle of molding is appropriately expressed as a workpiece.

<First Embodiment>
FIG. 1 is a perspective view of a carrier 1 manufactured by the manufacturing method according to the first embodiment of the present invention.

  The carrier 1 includes a flange portion 10, a clutch hub 20, a side wall 30, and a seat surface 40.

  The flange portion 10 is a disk-shaped portion orthogonal to the rotation axis of the carrier 1, and has a center opening 11 and a boss portion 12 extending upward from the peripheral edge portion of the center opening 11. Further, shaft holes 13 for supporting the pinion gear are formed in the flange portion 10 at equal intervals in the circumferential direction.

  The clutch hub 20 is a cylindrical portion that extends upward from the outer edge of the flange portion 10. The clutch hub 20 has a plurality of spline grooves 21 extending in parallel to the rotation axis of the carrier 1 on the outer periphery. A clutch plate (not shown) is slidably engaged with the spline groove 21.

  A plurality of side walls 30 extend downward from the outer edge of the flange portion 10 and are arranged at intervals in the circumferential direction of the carrier 1. Adjacent side walls 30 are connected by a seating surface 40 disposed between them and parallel to the flange portion 10. The seat surface 40 and the opening 60 between the seat surface 40 and the flange portion 10 are respectively formed by immersing a portion between adjacent side walls 30 into the carrier 1. The side wall 30 and the seating surface 40 are connected by a substantially triangular fillet portion 50 that is formed simultaneously with the pressing.

  A shaft hole 41 is formed in each seating surface 40. A cavity is formed by the flange portion 10, the seat surface 40 and the fillet portion 50, and a pinion gear (not shown) is accommodated in the cavity, and its rotation shaft is rotatably supported by the shaft holes 13 and 41.

  FIG. 2A and subsequent FIG. 2B are flowcharts showing the forming procedure of the carrier 1. The forming procedure of the carrier 1 will be described with reference to these. The right side of the flowchart shows the work after each step.

  First, in the preparation step of S1, a blank 100 is prepared. The blank 100 is a disk-shaped member that is thicker than the flange portion 10 to be molded later.

  In the first piercing process of S <b> 2, a round bar punch (not shown) is pressed against the center of the blank 100, and the center opening 11 is formed at the center of the blank 100.

  In S3, a first forging step is performed. FIG. 3A shows the state of the workpiece before and after the first forging step. The left side in the figure shows the state before processing, and the right side in the figure shows the state after processing (the same applies to FIGS. 3B to 3F).

In the first forging step, the first annular punch 110 having an inner diameter larger than the central opening 11 and an outer diameter smaller than the blank 100 is pressed against the blank 100 and the diameter-enlarging jig 111 from the lower side of the central opening 11. Is pressed. As a result, the boss 12 is formed around the center opening 11 while the diameter of the center opening 11 is increased. At the same time, the thickness of the portion where the first annular punch 110 is pressed moves outward in the radial direction, the thick portion 14 is formed on the outermost peripheral side, and the annular shape is formed between the boss portion 12 and the thick portion 14. The recess 15 is formed.

  In S4, a second forging step is performed. FIG. 3B shows the state of the workpiece before and after the second forging step.

  In the second forging step, the cylindrical support jig 121 is centered so that the annular support jig 120 is pressed against the annular recess 15 so that the thick portion 14 does not move radially inward and the central opening 11 is not deformed. The second annular punch 130 inserted into the opening 11 and having an inner diameter slightly larger than the inner diameter of the thick portion 14 (an inner diameter larger than the thickness of a cylindrical portion 16 described later) in this state is pressed against the thick portion 14. As a result, the thick portion 14 is crushed and the thick portion 14 moves radially outward leaving a portion immediately outside the annular recess 15.

  By the first forging step of S3 and the second forging step of S4, the flange portion 10 of the carrier 1, the tubular portion 16 extending upward from the outer surface edge of the flange portion 10, and the radially outer side from the flange portion 10 An annular rim portion 17 extending in the direction is formed.

  In S5, the second piercing step is performed. FIG. 3C shows the state of the workpiece before and after the second piercing step.

  In the second piercing step, the annular support jig 140 is pressed against the flange portion 10 and the cylindrical support jig 141 is inserted into the central opening 11. In this state, the punching punch 150 having a plurality of arcuate tip surfaces is formed into the cylinder. A plurality of arc-shaped slits 18 are formed at equal intervals along the cylindrical portion 16 by being pressed to the outer side of the cylindrical portion 16 (innermost circumference of the rim portion 17). As a result, the rim portion 17 is divided into a seat surface planned portion 17a disposed outside the portion where the arc-shaped slit 18 is formed and a side wall planned portion 17b disposed outside the portion where the arc-shaped slit 18 is not formed. The planned bearing surface portions 17a and the planned side wall portions 17b are alternately arranged in the circumferential direction.

  In S6 (FIG. 2B), a bending process is performed. FIG. 3D shows the state of the workpiece before and after the bending process.

  In the bending process, the annular support jig 160 is pressed against the flange portion 10 and the cylindrical support jig 161 is inserted into the central opening 11, and the tip surface is inclined so that the normal line faces radially outward in this state. That is, the bending punch 170 having a sharp inner peripheral side is pressed against the planned seating surface portion 17a. Thereby, until the seat surface planned site | part 17a contact | abuts to the slope 301 provided in the lower mold | type 300, it is expanded below to radial direction, being pushed below. In addition, an opening 60 is formed between the flange portion 10 and the planned seating surface portion 17a, and a portion between the planned seating surface portion 17a and the planned side wall portion 17b undergoes plastic deformation, and the two portions are connected. A triangular fillet 50 is formed.

  In S7, the first drawing step is performed. FIG. 3E shows the state of the workpiece before and after the first drawing process.

  In the first squeezing step, the annular support jig 180 is pressed against the flange portion 10 and the cylindrical support jig 181 is inserted into the central opening 11. In this state, the inner peripheral surface of the cylindrical punch 190 is brought into contact with the planned side wall portion 17 b. The part is squeezed by being pressed, and the side wall planned part 17b is moved below the outer edge of the flange part 10 (below the cylindrical part 16). At this time, the planned seating surface portion 17 a sinks below the guide member 312 while being guided by the slope 311 disposed in the lower mold 310. In addition, the guide member 312 enters the opening 60 and deformation of the opening 60 is suppressed. A concave portion (not shown) for avoiding interference with the slope 311 is formed at a position corresponding to the slope 311 of the cylindrical punch 190.

  As a result, the seating surface 40 disposed below the flange portion 10 and parallel to the flange portion 10 and the side wall 30 extending from the outer edge of the flange portion 10 in the opposite direction to the cylindrical portion 16 are simultaneously molded. An opening 60 for exposing the pinion gear is formed between the flange portion 10 and the seat surface 40.

  In S8, the second drawing and ironing process is performed. FIG. 3F shows the state of the workpiece before and after the second drawing and ironing process.

  In the second drawing and ironing process, the punch 200 is pressed against the flange portion 10, the cylindrical support jig 201 is inserted into the center opening 11, and the work is pressed into the lower mold 320. As a result, the diameter of the side wall 30 is first reduced, and subsequently, the outer periphery of the cylindrical portion 16 is squeezed, and a plurality of spline grooves 21 extending in the vertical direction are formed on the outer periphery of the cylindrical portion 16. The resulting clutch hub 20 is molded.

  In the shaft hole machining step of S9, the shaft holes 13 and 41 that support the rotation shaft of the pinion gear are drilled in the flange portion 10 and the seating surface 40, respectively.

  Then, the effect of 1st Embodiment is demonstrated.

  According to the first embodiment, since the carrier 1 integrated with the clutch hub 20 is integrally formed from one member (blank 100), the number of parts and the number of processing steps can be reduced. Since it is not necessary to join a plurality of members, strength reduction due to poor joining is not caused. Further, since the opening 60 formed at the initial position of the seating surface 40 serves as an opening for exposing the pinion gear, the yield of the material is improved as compared with the case where the opening 60 is punched. Corresponding).

Second Embodiment
Next, the second embodiment will be described. The same code | symbol about the structure common to 1st Embodiment is attached | subjected, and description is abbreviate | omitted suitably.

  FIG. 4 is a perspective view of the carrier 1 manufactured by the manufacturing method according to the second embodiment of the present invention.

  The carrier 1 has a structure integrated with the clutch hub 20 like the carrier 1 manufactured by the manufacturing method according to the first embodiment, but the center in the width direction of the side wall 30 is radially inward along the vertical direction. The difference is that a rib 31 that is pushed in and protrudes inside the carrier 1 is formed.

  The flowchart of the molding procedure of the carrier 1 is composed of FIG. 2A and subsequent FIG. The preparation step (S1) to the second piercing step (S5), the second drawing and ironing step (S8), and the shaft hole processing step (S9) are common to the first embodiment, and the bending step (S6) and It is different from the first embodiment in that the first bending step (S16) and the second bending step (S17) are performed instead of the first drawing step (S7).

  Hereinafter, the first bending step (S16) and the second bending step (S17) will be described with reference to FIG.

6A and 6B show the state of the workpiece before and after the first bending step. 6A is a cross section passing through the center in the width direction of the planned seat surface portion 17a, and FIG. 6B is a cross section passing through the center in the width direction of the side wall planned portion 17b.

  In the first bending step, the annular support jig 160 is pressed against the flange portion 10 and the cylindrical support jig 161 is inserted into the center opening 11. Then, in this state, the bending punch 170a whose tip surface is inclined so that the normal line is directed radially outward is pressed against the seat surface planned portion 17a, and the bending punch 170b whose tip protrudes in a triangular roof shape is the side wall planned portion 17b. Pressed against. The amount of protrusion at the tip of the bending punch 170b increases as it goes outward in the radial direction and approaches the center in the width direction.

  As a result, the planned seating surface portion 17 a is expanded radially outward while being pushed downward until it comes into contact with the inclined surface 331 provided on the lower mold 330. Further, the planned side wall portion 17b is pressed against the inclined surface 332 provided on the lower die 330 and corresponding to the tip of the bending punch 170b, and is bent into a V shape with the center in the width direction as the center.

  In addition, an opening 60 is formed between the flange portion 10 and the planned seating surface portion 17a, and a portion between the planned seating surface portion 17a and the planned side wall portion 17b undergoes plastic deformation, and the two portions are connected. A triangular fillet 50 is formed.

  7A and 7B show the state of the workpiece before and after the second bending step. FIG. 7A is a cross section passing through the center in the width direction of the planned seat surface portion 17a, and FIG. 7B is a cross section passing through the center in the width direction of the side wall planned portion 17b.

  In the second bending step, the annular support jig 180 is pressed against the flange portion 10 and the cylindrical support jig 181 is inserted into the center opening 11. In this state, when the cylindrical member 210 with the tip end surface 211 inclined is lowered, the first slide hook 221 and the second slide hook 222 that contact the tip end surface 211 are moved in the radial direction along the guide surface 341 of the lower mold 340. It moves down while moving inward.

  As shown in FIG. 7A, the first slide hook 221 has an engaging portion 221a at the tip, and engages with the planned seat surface portion 17a via the engaging portion 221a. When the first slide hook 221 moves radially inward and downward, the seat surface planned portion 17a moves to a position below the outer edge of the flange portion 10 (just below the tubular portion 16). In this state, the seat surface planned portion 17 a is parallel to the flange portion 10.

  As a result, a seating surface 40 is formed below the flange portion 10 and parallel to the flange portion 10, and an opening 60 for exposing the pinion gear is formed between the flange portion 10 and the seating surface 40. The

  Further, as shown in FIG. 7B, the second slide hook 222 has an engaging portion 222a at the tip thereof, and engages with the side wall planned portion 17b via the engaging portion 222a. When the second slide hook 222 moves radially inward and downward, the side wall portion 17b rotates downward about the connection portion with the flange portion 10, and in particular, the end portion at the center in the width direction is more than the outer edge of the flange portion 10. Is also pushed to the inner position.

  As a result, a side wall 30 extending from the outer edge of the flange portion 10 in the direction opposite to the cylindrical portion 16 and a mountain-shaped rib 31 (FIG. 4) projecting radially inward from the side wall 30 are formed.

  In the second embodiment, in addition to the function and effect of the first embodiment, the rib 31 is formed, whereby the rigidity of the carrier 1 is improved as compared with the first embodiment (Claim 3). 5).

  The embodiment of the present invention has been described above, but the above embodiment is merely an example of application of the present invention, and is not intended to limit the technical scope of the present invention to the specific configuration of the above embodiment. Various modifications can be made without departing from the spirit of the present invention.

  For example, in the present embodiment, the clutch hub 20 is formed integrally with the carrier 1, but a clutch drum having a spline groove 21 with which the clutch plate is engaged may be formed integrally.

DESCRIPTION OF SYMBOLS 1 Carrier 10 Flange part 16 Cylindrical part 17 Rim part 17a Expected seat surface part 17b Expected side wall part 20 Clutch hub 30 Side wall 31 Rib 40 Seat surface 60 Opening 100 Blank

Claims (5)

A method of manufacturing a carrier that supports a pinion gear of a planetary gear mechanism and is integrated with a clutch drum or a clutch hub,
A preparation step of preparing a disc-shaped blank;
Forging process of forming the blank, forming a flange portion of the carrier, a cylindrical portion extending from the surface of the flange portion, and an annular rim portion extending radially outward from the flange portion;
A bending step of alternately dividing the rim portion into a predetermined side wall portion and a predetermined seating surface portion in the circumferential direction, and forming an opening for exposing the pinion gear by expanding the radially outer side while pushing the predetermined seating surface portion;
A step of forming the seat surface of the pinion gear by forming the side surface of the carrier by molding the side wall of the carrier, and forming the seat surface of the pinion gear by moving the planned surface of the seat surface below the flange portion,
A spline groove forming step of forming a spline groove on the inner periphery or outer periphery of the cylindrical portion;
A method for producing a carrier, comprising: It is a manufacturing method of the carrier according to claim 1, Comprising:
The forging step includes two steps of a first forging step for crushing the inner peripheral side of the blank and a second forging step for crushing the outer peripheral side of the blank.
A carrier production method characterized by the above. A method of manufacturing a carrier that supports a pinion gear of a planetary gear mechanism and is integrated with a clutch drum or a clutch hub,
A preparation step of preparing a disc-shaped blank;
Forging process of forming the blank, forming a flange portion of the carrier, a cylindrical portion extending from the surface of the flange portion, and an annular rim portion extending radially outward from the flange portion;
A first bending step in which the rim portion is alternately divided into a predetermined side wall portion and a predetermined seating surface portion in the circumferential direction, and an opening for exposing the pinion gear is formed by expanding the radially outer side while pushing the predetermined seating surface portion. When,
By pressing the center in the width direction of the planned side wall portion inward in the radial direction to form the side wall of the carrier having ribs protruding radially inward, the planned seat surface portion is moved below the flange portion to A second bending step for forming the bearing surface of the pinion gear;
A spline groove forming step of forming a spline groove on the inner periphery or outer periphery of the cylindrical portion;
A carrier production method characterized by the above. A carrier that supports the pinion gear of the planetary gear mechanism,
A flange portion integrally formed from one member, a clutch drum or clutch hub extending from the surface of the flange portion, and a side wall extending from the flange portion in a direction opposite to the clutch drum or clutch hub;
A seating surface of the pinion gear parallel to the flange portion formed by immersing a part of the side wall into the carrier;
With
An opening for exposing the pinion gear is formed at an initial position of the submerged portion. The carrier according to claim 4,
A rib protruding radially inward from the side wall is formed by pushing the radial center of the side wall radially inward,
A career characterized by that.