JP2012247004A - Drive plate, and plate member of drive plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive plate and a plate member of the drive plate, capable of reducing the weight of the drive plate while securing stiffness and durability of the drive plate.SOLUTION: The drive plate 10 includes: a plate member 11 fixed to a crankshaft 2 of an engine; and a ring gear member 12 which has a ring gear 120 on the outer circumference and has a plurality of fastening parts 121a fastened to the plate member 11 on the inner peripheral side than the ring gear 120. Therein, the plate member 11 has: a center hole 110 used for fixation to the crankshaft 2; a plurality of fastening holes 111 which are formed on the outer circumferential part of the plate member 11 and are used respectively for fastening to the fastening parts 121a of the ring gear member 12; and a plurality of lightening holes 113 which are formed between the center holes 110 and the respective fastening holes 111.

Description

  The present invention relates to a drive plate for transmitting power from an engine to a power transmission target and a plate member constituting the drive plate.

  Conventionally, as this type of drive plate, a ring gear as an annular member having a flat side surface portion and an inner cylindrical surface and having a protruding column integrally formed on one side surface, and a hole through which the protruding column of the ring gear is inserted Has been proposed (see Patent Document 1, for example). In this drive plate, the ring gear and the thin disk are clamped and clamped by inserting the tip of the protruding column of the ring gear into the hole of the thin disk and plastically deforming the tip of the protruding column inserted through the hole. The

JP-A-5-237568

  The drive plate as described above is fixed to the crankshaft of the engine and fixed to the power transmission target, and transmits the rotational torque from the engine to the power transmission target. Therefore, the drive plate is required to be as light as possible while requiring high rigidity and durability.

  Therefore, the main object of the present invention is to reduce the weight of the drive plate while ensuring the rigidity and durability of the drive plate.

  The drive plate and the plate member of the drive plate of the present invention employ the following means in order to achieve the above-mentioned main object.

The drive plate of the present invention is
A drive plate that has a ring gear that can mesh with a gear of a motor that cranks the engine, and that transmits power from the engine to a power transmission target,
A plate member fixed to the crankshaft of the engine;
A plurality of fastening portions that are configured as annular members having the ring gear on the outer periphery, are fastened to the plate member on the inner peripheral side of the ring gear, and the power transmission target side from the inner peripheral side of the ring gear. And a ring gear member including a plurality of extended welds that are welded to the power transmission target component member.
The plate member has a center hole used for fixing to the crankshaft, and a plurality of fastening holes formed on the outer peripheral side of the center hole and used for fastening to the fastening portion of the ring gear member, It has a plurality of light holes formed between the central hole and each fastening hole.

  A drive plate of the present invention is a ring gear that is a ring member that has a plate member fixed to a crankshaft of an engine, a ring gear on the outer periphery, and a plurality of fastening portions that are fastened to the plate member on the inner periphery side of the ring gear. It consists of members. The plate member includes a center hole used for fixing to the crankshaft, a plurality of fastening holes formed on the outer peripheral side of the center hole and used for fastening to the fastening portion of the ring gear member, and a center hole. And a plurality of light holes formed between the fastening holes. Thus, by forming a light hole between the center hole of the plate member and each fastening hole formed on the outer peripheral side of the center hole, other hole portions formed in the plate member It is possible to form a plurality of light holes having a relatively large opening area while ensuring the interval. Therefore, it is possible to reduce the weight of the drive plate while ensuring the rigidity and durability of the plate member and the drive plate.

  The plate member is formed with a flat central portion in which the central hole is formed, a bent portion extending radially outward from the periphery of the central portion and curved in the axial direction, and the plurality of fastening holes. And a flat outer peripheral portion extending radially outward from the periphery of the bent portion, and the plurality of light holes may be formed in the bent portion. In this way, by forming multiple light holes in the bending part that is formed and hardened on the plate member, the rigidity and durability of the plate member and drive plate can be secured better, while the light weight of the drive plate Can be achieved.

  Further, the outer periphery of the bent portion may be a circle concentric with the center hole, and the outer diameter of the bent portion may be 65% to 85% of the maximum diameter of the plate member. As a result, the area of the bent portion can be increased while securing the area of the outer peripheral portion, so that the plate member and the drive plate can be formed in the bent portion while ensuring the rigidity and durability of the plate member and drive plate. The opening area of each light hole can be made as large as possible.

  The center of the light hole may be located on a straight line connecting the center of the center hole and the center of the fastening hole. As a result, it is possible to form a plurality of light holes in the plate member while maintaining good rotation balance of the plate member and thus the drive plate.

  Furthermore, the plate member is formed in a region surrounded by the two fastening holes adjacent to each other and the two light holes adjacent to each other and formed inside the two fastening holes. You may have two or more. As a result, a plurality of light holes having a relatively large opening area can be formed while ensuring an interval between the holes formed in the plate member.

  A plurality of recesses may be formed on the outer periphery of the plate member so as to be recessed radially inward between the adjacent fastening holes. Thus, by forming a plurality of recesses on the outer periphery of the plate member, it is possible to further reduce the weight of the drive plate while ensuring good rigidity and durability of the plate member and the drive plate.

  Furthermore, the ring gear member may include an annular support member having the plurality of fastening portions and the plurality of extended weld portions on the inner peripheral side, and the ring gear being fixed to the outer periphery. In this way, by dividing the ring gear member into the annular support member and the ring gear, the ring gear created separately from the annular support member can be fixed to the annular support member, so that a gear is formed on the outer periphery of the ring gear member. The manufacturing process of the ring gear member can be facilitated by omitting the step of performing.

The plate member of the drive plate of the present invention is
It is fastened to a ring gear member having a ring gear that can mesh with a gear of a motor that cranks the engine on the outer periphery and is fixed to a crankshaft of the engine, and transmits power from the engine to a power transmission target together with the ring gear member. A plate member constituting the drive plate,
A center hole used for fixing to the crankshaft, a plurality of fastening holes formed on the outer peripheral side of the center hole and used for fastening to the ring gear member, and the center hole and each fastening hole. And a plurality of light holes formed therebetween.

  This plate member constitutes a drive plate that transmits power from the engine to a power transmission target together with a ring gear member having a ring gear on the outer periphery that can mesh with a gear of a motor that cranks the engine. A center hole used for fixing to the ring, a plurality of fastening holes formed on the outer peripheral side of the center hole and used for fastening to the fastening portion of the ring gear member, and between the center hole and each fastening hole. A plurality of light holes formed. Thus, by forming a light hole between the center hole of the plate member and each fastening hole formed on the outer peripheral side of the center hole, other hole portions formed in the plate member It is possible to form a plurality of light holes having a relatively large opening area while ensuring the interval. Therefore, it is possible to reduce the weight of the drive plate while ensuring the rigidity and durability of the plate member and the drive plate.

1 is a perspective view of a drive plate 10 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state in which the drive plate 10 is attached to the fluid transmission device 3 that is a power transmission target. 3 is a plan view of the drive plate 10. FIG. It is a perspective view of the drive plate 10 seen from the fluid transmission device 3 side. It is a top view of the drive plate 10 seen from the fluid transmission apparatus 3 side. 3 is a perspective view showing an annular support member 121 that constitutes the ring gear member 12. FIG. It is the top view which looked at the annular support member 121 from the radial direction. It is a disassembled perspective view which shows the assembly | attachment procedure with respect to the crankshaft 2 and the fluid transmission apparatus 3 of the plate member 11 and the ring gear member 12 which comprise the drive plate 10 concerning an Example.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a perspective view of a drive plate 10 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing a mounting state of the drive plate 10 to a fluid transmission device 3 that is a power transmission target. FIG. 3 is a plan view of the drive plate 10. The drive plate 10 shown in these drawings is used to transmit power output from an engine (internal combustion engine) (not shown) as a prime mover mounted on a vehicle to a fluid transmission device 3 that is a power transmission target. In the embodiment, the fluid transmission device 3 is a torque converter mounted as a starting device on a vehicle equipped with an engine as a prime mover. That is, as shown in FIG. 2, the fluid transmission device 3 includes a front cover 30 that is coupled to the crankshaft 2 of the engine via the drive plate 10, a pump impeller that is tightly fixed to the front cover 30, and a pump impeller. A turbine runner that can rotate coaxially, a turbine hub (none of which is not shown) and the like that are fixed to the input shaft of the transmission and connected to the turbine runner are included.

  As shown in FIGS. 1 to 3, the drive plate 10 according to the embodiment has a plate member 11 fixed to the crankshaft 2 of the engine, a ring gear 120 on the outer periphery, and can be fastened to the plate member 11. And an annular ring gear member 12 fixed to the transmission device 3. That is, the drive plate 10 of the embodiment can be divided into two parts: a plate member 11 attached to the engine side and a ring gear member 12 attached to the fluid transmission device 3. Therefore, the plate member 11 and the ring gear member 12 can be fastened together with the plate member 11 attached in advance to the crankshaft 2 of the engine and the ring gear member 12 attached in advance to the fluid transmission device 3.

  The plate member 11 is formed by press-molding a flexible plate material such as a cold-rolled steel plate, for example. As shown in FIGS. 1 to 3, the plate member 11 is a flat disk-like shape having a central hole 110 formed at the center. A central portion 11a, a bent portion 11b extending radially outward from the periphery of the central portion 11a and curved in the axial direction, and a plurality (six in the embodiment) fastening holes 111 are formed at equal intervals on the outer peripheral side. And a flat outer peripheral portion 11c extending radially outward from the periphery of the bent portion 11b. A plurality (six in the embodiment) of crankshaft coupling holes 112 are formed at equal intervals around the center hole 110 in the center portion 11a. Further, the tip of the crankshaft 2 is fitted into the center hole 110 of the plate member 11, and the hole formed at the center of the tip of the crankshaft 2 is fixed to the center of the outer surface of the front cover 30 of the fluid transmission device 3. The input side center piece 4 is fitted. The crankshaft 2 and the plate member 11 are inserted into the crankshaft connecting hole 112 through thin flat disk-shaped spacers 5 disposed on the front surface side and the back surface side of the plate member 11 (center portion 11a). Fastened with bolts.

  As shown in FIGS. 1 and 3, the bent portion 11 b of the plate member 11 is formed by pressing so as to have an outer periphery that is a circle concentric with the center hole 110. The outer diameter (outer diameter) of the bent portion 11b is a plate member in consideration of the area of the central portion 11a (flat portion) where the front and back surfaces are in contact with the spacer 5 and the rigidity required for the drive plate 10. 11 is determined to be 65% to 85%, more preferably about 75% to 85% of the maximum diameter of the entire 11 (outer diameter at a portion where a recess 115 described later does not exist, see Rmax in FIG. 3). The bending portion 11b is equidistant in the circumferential direction so as to be positioned between the central hole 110 of the central portion 11a and the fastening holes 111 formed in the outer peripheral portion 11c when the plate member 11 is press-formed. A plurality (six in the embodiment) of light holes 113 are formed. In the embodiment, each light hole 113 is a circular hole, and is arranged so that the center thereof is located on a straight line connecting the center of the center hole 110 and the center of the fastening hole 111.

  The plate member 11 is formed with a plurality (six in the embodiment) of punch holes 114 at equal intervals in the circumferential direction so as to straddle between the bent portion 11b and the outer peripheral portion 11c. As shown in FIG. 1 and FIG. 3, each punch hole 114 includes two fastening holes 111 adjacent to each other and two light holes 113 formed inside the two fastening holes 111 and adjacent to each other. It is formed in the enclosed area. The plurality of punched holes 114 are provided for cranking the engine through the plate member 11 by an inspection cell motor (not shown) for the purpose of performing an operation test of the engine before assembling the engine to the vehicle. It is. When performing an engine operation test, an adapter (not shown) is connected to the plate member 11 through the plurality of punched holes 114, and the adapter is connected to the rotating shaft of the inspection cell motor. Power is transmitted to the engine via the plate member 11.

  Further, as shown in FIG. 3, a plurality of (in the embodiment, twelve) recesses 115 are formed on the outer periphery of the plate member 11 so as to be recessed radially inward between the mutually adjacent fastening holes 111. The plurality of recesses 115 are formed at regular intervals from the fastening holes 111 and the punched holes 114 so that the rigidity of the plate member 11 can be ensured. In addition, the plate member 11 is formed with a balance hole 116 (see FIG. 3) for adjusting the rotation balance and the like of the plate member 11 as necessary. The balance hole 116 is mainly formed in the outer peripheral portion 11c so as not to impair the rigidity of the plate member 11, and more specifically, a line connecting the centers of the fastening holes 11 (see a two-dot chain line in FIG. 3). ) On the outer peripheral side.

  As described above, if a plurality of light holes 113 are formed so as to be positioned between the center hole 110 and each fastening hole 111 with respect to the bending portion 11b formed on the plate member 11 and work hardened, A plurality of light holes 113 having a relatively large opening area are formed while ensuring a sufficient clearance and rigidity of the plate member 11 and thus the drive plate 10 while ensuring a distance from the punched holes 114 formed in the plate member 11. Thus, the weight of the drive plate 10 can be reduced. If the outer diameter of the bent portion 11b is 65% to 85% of the maximum diameter of the plate member 11, the area of the bent portion 11b can be increased while securing the area of the outer peripheral portion 11c. The opening area of each light hole 113 formed in the bent portion 11b can be made as large as possible while ensuring the rigidity and durability of the plate member 11 and the drive plate 10 better. Further, if the light hole 113 is disposed between the center hole 110 and the fastening hole 111 so that the center thereof is positioned on a straight line connecting the center of the center hole 110 and the center of the fastening hole 111, the plate member 11 is provided. As a result, a plurality of light holes 113 can be formed in the plate member 11 while maintaining a good rotational balance of the drive plate 10. Further, if each punched hole 114 is formed in a region surrounded by two fastening holes 111 adjacent to each other and the two lightening holes 113 adjacent to each other and formed inside the two fastening holes 111, A plurality of light holes 113 having a relatively large opening area can be formed while securing a space between the female hole 113 and the punched hole 114. In addition, by forming the plurality of recesses 115 on the outer periphery of the plate member 11, it is possible to further reduce the weight of the drive plate 10 while ensuring good rigidity and durability of the plate member 11 and the drive plate 10. . Note that the sizes of the light hole 113, the punch hole 114, and the recess 115 are determined by experiments and analysis so that the rigidity required for the plate member 11 can be ensured.

  On the other hand, the ring gear member 12 is connected to a rotor of a cell motor (not shown) that cranks the engine, and can be engaged with a pinion gear that is moved toward the drive plate 10 when the engine is started, and the ring gear 120 is fixed to the outer periphery. And a substantially annular annular support member 121 that can be fastened to the plate member 11 and is fixed to the front cover 30 of the fluid transmission device 3. In the embodiment, the ring gear 120 is manufactured separately from the annular support member 121 using, for example, existing ring gear manufacturing equipment, and is fixed to the outer periphery of the annular support member 121 by press fitting, caulking, or welding.

  4 is a perspective view of the drive plate 10 as seen from the fluid transmission device 3 side, FIG. 5 is a plan view of the drive plate 10 as seen from the fluid transmission device 3 side, and FIG. 6 shows the annular support member 121. FIG. 7 is a perspective view of the annular support member 121 as seen from the radial direction. The annular support member 121 is formed by press-molding a flexible plate material such as a cold rolled steel plate, for example, and corresponds to the position where the fastening hole 111 of the outer peripheral portion 11c of the plate member 11 is formed. It has a plurality of (six in the embodiment) fastening portions 121a extending radially inward (center side) from the inner peripheral portion. Fastening holes 121b are formed in the respective fastening portions 121a so as to correspond to the fastening holes 111 formed in the plate member 11, respectively. The plate member 11 and the ring gear member 12 are fastened by bolts 15 and nuts 16 that are inserted through the fastening holes 111 of the plate member 11 and the fastening holes 121b of the annular support member 121 of the ring gear member 12. Here, in the embodiment, when the fastening portion 121a of the annular support member 121 is formed (pressed) as the nut 16 that is a fastening member, the fastening hole 121b can be formed in the fastening portion 121a with the nut itself. In addition, one that is caulked and fixed to the fastening portion 121a (for example, “pierce nut”) is used. Instead of using the nut 16 to fasten the plate member 11 and the ring gear member 12, burring may be performed around each fastening hole 121b of the annular support member 121 through which the bolt 15 is inserted. A block may be used.

  In addition, the annular support member 121 includes a plurality (in the embodiment, extended from the space between adjacent fastening portions 121a on the inner peripheral portion to the axial direction of the crankshaft 2 and the fluid transmission device 3 and to the fluid transmission device 3 side. 6) of the extended welded portions 122 and the adjacent extended welded portions 122 so as to be continuous with the adjacent extended welded portions 122 and lower height than the adjacent extended welded portions 122. The rib portion 123 is provided. The extended welded portion 122 and the rib portion 123 are formed by bending the inner peripheral portion of the annular support member 121 by press working.

  As shown in FIGS. 4 to 7, the extended welded portion 122 includes a substantially arc-shaped peripheral edge portion 122 a welded to the front cover 30 of the fluid transmission device 3, and a side portion that extends flatly in the axial direction from the peripheral edge portion 122 a. 122b and a corner portion 122c formed so as to be continuous between the side portion 122b and the rib portion 123. The extended welded portion 122 extends to a position where it is fitted to the outer peripheral portion of the front cover 30 of the fluid transmission device 3, and the peripheral edge portion 122 a is welded to the outer peripheral portion of the front cover 30. The weld length between the peripheral edge 122a of each extension weld 122 and the outer periphery of the front cover 30 is determined so as to be able to withstand the torque transmitted from the engine to the front cover 30. However, the manner of fixing the ring gear member 12 to the fluid transmission device 3 is not limited to this. For example, the side portion 122 b of the extended welded portion 122 may be welded to the outer peripheral portion of the front cover 30 in addition to the peripheral edge portion 122 a of the extended welded portion 122. As a result, the drive plate 10 can be more firmly fixed to the fluid transmission device 3 (front cover 30) that is the target of power transmission, and the durability of the welded portion can be improved. Further, the extended welded portion 122 is extended to a joint portion between the front cover 30 of the fluid transmission device 3 and a pump shell (not shown), and the extended welded portion 122 and the front cover 30 are welded at the joint portion. Alternatively, the welded portion 122 and the front cover 30 may be welded from the engine side (the right side in FIG. 2).

  4 and 5, the rib portion 123 is formed along the inner peripheral portion of the annular support member 121, and the curved portion 123a along the outer periphery of the fastening hole 121b formed in the fastening portion 121a. A linear portion 123b extending from the curved portion 123a toward the extended welded portion 122, and a curved portion 123c between the linear portion 123b and the extended welded portion 122. Accordingly, the rib portion 123 can be formed so as not to interfere with the nut 16 with respect to the annular support member 121 (ring gear member 12) while securing a space for arranging the nut 16 in the fastening portion 121a.

  As described above, between the adjacent extended welded portions 122 of the annular support member 121 constituting the ring gear member 12, the adjacent extended welded portions 122 are continuous with the adjacent extended welded portions 122. By forming the low-profile rib portion 123, the rigidity of the extension welded portion 122, that is, the connection portion of the drive plate 10 to the fluid transmission device 3 that is the power transmission target is increased, and the extension welded portion 122 and thus the drive plate 10. The durability of can be further improved. Further, by forming a corner portion 122c between the side portion 122b of the extended welded portion 122 and the rib portion 123, when the power from the engine is transmitted to the fluid transmission device 3, the extended welded portion 122 and the rib It is possible to improve the durability of the extended welded portion 122 and thus the drive plate 10 by not excessively concentrating stress on the boundary portion with the portion 123. It should be noted that the specifications such as the height and thickness of the side portion 122b, the corner portion 122c, and the rib portion 123 of the extended welded portion 122 are tested to satisfy the durability required for the extended welded portion 122 and the drive plate 10. It is determined based on analysis.

  In the drive plate 10 configured as described above, the plate member 11 is fixed to the crankshaft 2 of the engine, the ring gear member 12 is fixed to the front cover 30 of the fluid transmission device 3, and the plate member 11 and the ring gear member are further fixed. 12 is interposed between the engine crankshaft 2 and the fluid transmission device 3. The power output from the engine is transmitted to the front cover of the fluid transmission device 3 via the crankshaft 2, the plate member 11, the annular support member 121 of the ring gear member 12, and the extended welds 122 of the annular support member 121. 30 and further transmitted to a transmission (not shown) by the fluid transmission device 3. In addition, when the engine is cranked and started by the cell motor, cranking torque from the cell motor is transmitted through the ring gear 120, the annular support member 121 and the plate member 11 meshed with the pinion gear of the cell motor. Is transmitted to.

  Next, the manufacturing procedure of the plate member 11 and the ring gear member 12 constituting the drive plate 10 of the embodiment and the assembly procedure of the drive plate 10 to the fluid transmission device 3 will be described.

  In producing the plate member 11 and the ring gear member 12 constituting the drive plate 10, for example, after obtaining a member serving as a base of the plate member 11 from a plate material such as a cold rolled steel plate, the member is subjected to press working or the like. The above-described plate member 11 having the central portion 11a, the bent portion 11b, the outer peripheral portion 11c, the plurality of light holes 113, the punched holes 114, the concave portions 115, and the like is obtained. Further, for example, an annular body that is the base of the annular support member 121 of the ring gear member 12 is cut out from a plate material such as a cold-rolled steel sheet, and the annular body is subjected to press working or the like, so that the fastening portion 121a, the extended welding portion 122, and the rib portion 123 are formed. Etc., the annular support member 121 is obtained.

  The ring gear member 12 can be obtained by press-fitting the annular support member 121 into the inner periphery of the ring gear 120 manufactured separately from the annular support member 121, or by fixing both members by caulking or welding. Here, when cranking the engine, a very large torque is not applied from the cell motor to the ring gear 120 or the annular support member 121. Therefore, even if the ring gear 120 and the annular support member 121 are fixed by press-fitting or caulking, both can be firmly fixed for a long time, and the ring gear 120 and the annular support member 121 are fixed by welding. In this case, the welding location (welding length) between the two can be greatly reduced.

  FIG. 8 shows an assembling procedure of the plate member 11 and the ring gear member 12 constituting the drive plate 10 manufactured as described above to the crankshaft 2 and the fluid transmission device 3. The plate member 11 constituting the drive plate 10 of the embodiment is attached to the crankshaft 2 by bolts inserted into the crankshaft connecting hole 112 via spacers 5 arranged on the front and back of the center portion 11a in an engine assembly factory, for example. Fastened (see the dashed line in FIG. 8). Further, the ring gear member 12 constituting the drive plate 10 of the embodiment is welded, for example, to the outer peripheral portion of the front cover 30 at the peripheral edge portion of each extended welded portion 122 of the annular support member 121 in the assembly plant of the fluid transmission device 3 or the like. By doing so, it is fixed to the fluid transmission device 3 (see the two-dot chain line in FIG. 8). In this manner, the plurality of extended welds 122 are extended from the inner peripheral side portion of the ring gear member 12 to the ring gear 120, that is, the inner peripheral side portion of the annular support member 121 to the fluid transmission device 3 side, and each extension is extended. By welding the out welded portion 122 to the outer peripheral portion of the front cover 30 of the fluid transmission device 3, the influence of heat on the radially extending portion of the front cover 30 is reduced, and the extended welded portion 122 and the fluid A sufficient distance between the welded portion of the transmission device 3 with the front cover 30 and the ring gear 120 can be secured to reduce the influence of heat due to welding on the ring gear 120.

  Thus, the plate member 11 attached to the engine side and the ring gear member 12 attached to the fluid transmission device 3 are, for example, each fastening hole 111 of the plate member 11 and each fastening hole 121b of the ring gear member 12 in a vehicle assembly plant or the like. The bolts 15 are inserted through the nuts 15 and screwed into the nuts 16 fixed to the annular support member 121 to be fastened to each other. In the ring gear member 12 of the embodiment, each nut 16 is caulked and fixed to the fastening portion 121a when the annular support member 121 is pressed, but in FIG. 8, the structure of the drive plate 10 is easily understood. Therefore, each nut 16 is shown separately from the annular support member 121 (fastening portion 121a). The procedure for interposing the drive plate 10 between the engine and the fluid transmission device 3 is not limited to that described above, and after the plate member 11 and the ring gear member 12 are fixed to each other, the drive plate 10 is attached to the engine. And the fluid transmission device 3 may be interposed.

  As described above, the drive plate 10 of the embodiment has the plate member 11 fixed to the crankshaft 2 of the engine and the ring gear 120 on the outer periphery, and is fastened to the plate member 11 on the inner peripheral side of the ring gear 120. The ring gear member 12 is an annular member having a plurality of fastening portions 121a. The plate member 11 is formed with a center hole 110 used for fixing to the crankshaft 2 and a plurality of holes used to fasten the ring gear member 12 to the fastening portion 121a. The fastening hole 111 has a plurality of light holes 113 formed between the center hole 110 and each fastening hole 111. As described above, the light holes 113 are formed between the center hole 110 of the plate member 11 and the fastening holes 111 formed on the outer peripheral side of the center hole 110, thereby forming the plate member 11. A plurality of light holes 113 having a relatively large opening area can be formed while securing an interval with other holes such as the punched holes 114. Therefore, it is possible to reduce the weight of the drive plate 10 while ensuring the rigidity and durability of the plate member 11 and the drive plate 10.

  The plate member 11 includes a flat central portion 11a in which the central hole 110 is formed, a bent portion 11b that extends radially outward from the periphery of the central portion 11a and is curved in the axial direction, and a plurality of fastening holes 111. And a flat outer peripheral portion 11c extending radially outward from the periphery of the bent portion 11b, and a plurality of light holes 113 are formed in the bent portion 11b. In this way, by forming a plurality of light holes 113 in the bending portion 11b formed and hardened on the plate member 11, while ensuring the rigidity and durability of the plate member 11 and the drive plate 10 better. The drive plate 10 can be reduced in weight.

  Further, in the above embodiment, the outer periphery of the bent portion 11 b is a circle concentric with the center hole 110, and the outer diameter of the bent portion 11 b is 65% to 85% of the maximum diameter of the plate member 11. As a result, the area of the bent portion 11b can be increased while securing the area of the outer peripheral portion 11c, and therefore the bending work can be performed while ensuring the rigidity and durability of the plate member 11 and the drive plate 10 better. The opening area of each light hole 113 formed in the portion 11b can be made as large as possible.

  Further, if the center of the light hole 113 is positioned on a straight line connecting the center of the center hole 110 and the center of the fastening hole 111, the plate member 11 and thus the drive plate 10 can be maintained in a good balance and a plurality of Light holes 113 can be formed in the plate member 11.

  Further, the plate member 11 is positioned in a region surrounded by two fastening holes 111 adjacent to each other and two light holes 113 formed inside the two fastening holes 111 and adjacent to each other. If the punch holes 114 are formed, it is possible to form a plurality of light holes 113 having a relatively large opening area in the plate member 11 while ensuring a space between the light holes 113 and the punch holes 114.

  Further, if the plurality of recesses 115 are formed on the outer periphery of the plate member 11 so as to be recessed radially inward between the adjacent fastening holes 111, the rigidity and durability of the plate member 11 and the drive plate 10 can be ensured satisfactorily. However, the weight can be further reduced.

  And in the said Example, the ring gear member 12 contains the annular support member 121 to which the ring gear 120 is fixed to an outer periphery while having the some fastening part 121a and the some extended welding part 122 in an inner peripheral side. In this way, by dividing the ring gear member 12 into the annular support member 121 and the ring gear 120, the ring gear 120 created separately from the annular support member 121 can be fixed to the annular support member 121. Therefore, the ring gear member The step of forming a gear on the outer periphery of the ring 12 can be omitted, and the manufacturing of the ring gear member 12 can be facilitated. However, instead of dividing the ring gear member 12 into the ring gear 120 and the annular support member 121, the ring gear 120 and the annular support member 121 are configured as an integral member by forming the ring gear directly on the outer periphery of the annular support member 121. Needless to say.

  Here, the correspondence between the main elements of the above-described embodiments and modifications and the main elements of the invention described in the column of means for solving the problems will be described. In other words, in the above-described embodiment, the drive plate 10 that has the ring gear 120 that can mesh with the gear of the cell motor that cranks the engine and that transmits the power from the engine to the fluid transmission device 3 (power transmission target) is “ The plate member 11 that corresponds to the “drive plate” and is fixed to the crankshaft 2 of the engine corresponds to the “plate member”, and is configured as an annular member having the ring gear 120 on the outer periphery, and is further on the inner peripheral side than the ring gear 120. The plurality of fastening portions 121a fastened to the plate member 11 are respectively extended from the inner peripheral side of the ring gear 120 to the fluid transmission device 3 side and welded to the front cover 30 (component) of the fluid transmission device 3. Ring gear including a plurality of extended welds 122 having a peripheral edge 122a The material 12 corresponds to the “ring gear member”, the center hole 110 formed in the plate member 11 for fixing to the crankshaft 2 corresponds to the “center hole”, and is formed in the outer peripheral portion of the plate member 11. Each of the plurality of fastening holes 111 used for fastening the fastening part 121a of the ring gear member 12 corresponds to a “fastening hole”, and a plurality of light holes 113 formed between the center hole 110 and each fastening hole 111 are provided. Corresponds to “light hole”.

  However, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the invention described in the column of means for solving the problem by the embodiment. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. In other words, the examples are merely specific examples of the invention described in the column of means for solving the problem, and the interpretation of the invention described in the column of means for solving the problem is It should be done based on the description.

  The embodiments of the present invention have been described above using the embodiments. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention. Needless to say.

  INDUSTRIAL APPLICABILITY The present invention can be used in the manufacturing industry of drive plates that transmit power from an engine to a power transmission target and plate members that constitute the drive plates.

  2 Crankshaft, 3 Fluid transmission device, 4 Input side center piece, 5 Spacer, 10 Drive plate, 11 Plate member, 11a Center part, 11b Processing part, 11c Outer peripheral part, 12 Ring gear member, 15 Bolt, 16 Nut, 30 Front Cover, 110 Center hole, 111 Fastening hole, 112 Crankshaft connection hole, 113 Light hole, 114 Punching hole, 115 Recess, 116 Balance hole, 120 Ring gear, 121 Annular support member, 121a Fastening part, 121b Fastening hole, 122 Extension Out welded portion, 122a peripheral portion, 122b side portion, 122c corner portion, 123 rib portion, 123a curved portion, 123b linear portion, 123c curved portion.

Claims (8)

A drive plate that has a ring gear that can mesh with a gear of a motor that cranks the engine, and that transmits power from the engine to a power transmission target,
A plate member fixed to the crankshaft of the engine;
A plurality of fastening portions that are configured as annular members having the ring gear on the outer periphery, are fastened to the plate member on the inner peripheral side of the ring gear, and the power transmission target side from the inner peripheral side of the ring gear. And a ring gear member including a plurality of extended welds that are welded to the power transmission target component member.
The plate member has a center hole used for fixing to the crankshaft, and a plurality of fastening holes formed on the outer peripheral side of the center hole and used for fastening to the fastening portion of the ring gear member, A drive plate having a plurality of light holes formed between the center hole and each fastening hole. The drive plate according to claim 1,
The plate member is formed with a flat central portion in which the central hole is formed, a bent portion extending radially outward from the periphery of the central portion and curved in the axial direction, and the plurality of fastening holes are formed. And a flat outer peripheral portion extending radially outward from the periphery of the bent portion, and the plurality of light holes are formed in the bent portion. The drive plate according to claim 2,
An outer periphery of the bent portion is a circle concentric with the central hole, and an outer diameter of the bent portion is 65% to 85% of a maximum diameter of the plate member. The drive plate according to any one of claims 1 to 3,
The drive plate according to claim 1, wherein the center of the light hole is located on a straight line connecting the center of the center hole and the center of the fastening hole. The drive plate according to claim 4,
The plate member includes a plurality of punched holes formed in a region surrounded by the two fastening holes adjacent to each other and the two light holes adjacent to each other and formed inside the two fastening holes. A drive plate characterized by comprising: The drive plate according to any one of claims 1 to 5,
The drive plate according to claim 1, wherein a plurality of recesses are formed on an outer periphery of the plate member so as to be recessed radially inward between the adjacent fastening holes. The drive plate according to any one of claims 1 to 6,
The ring gear member includes an annular support member having the plurality of fastening portions and the plurality of extended weld portions on an inner peripheral side, and the ring gear being fixed to the outer periphery. It is fastened to a ring gear member having a ring gear that can mesh with a gear of a motor that cranks the engine on the outer periphery and is fixed to a crankshaft of the engine, and transmits power from the engine to a power transmission target together with the ring gear member. A plate member constituting the drive plate,
A center hole used for fixing to the crankshaft, a plurality of fastening holes formed on the outer peripheral side of the center hole and used for fastening to the ring gear member, and the center hole and each fastening hole. A plate member of a drive plate comprising a plurality of light holes formed therebetween.

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