JP2016191457A - Connection member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce influence of heat generated by welding in a connection member for connecting a cover member of a start device to a drive plate.SOLUTION: A through hole 303 is formed at a plate member 300 of a connection member 30. A first nut member 310 has a male screw part 314 and includes a protruding part 312 which penetrates through the through hole 303. A female screw part 323 of a second nut member 320 threadedly engages with the male screw part 314 of the protruding part 312 penetrating through the through hole 303. A rotation restriction mechanism formed by a rotation restriction surface 303p of the plate member 300 and a rotation restricted surface 322p of the second nut member 320 restricts rotations of the second nut member 320 and the first nut member 310, which is threadedly engaged with the second nut member 320, relative to the plate member 300.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a connecting member that connects a drive plate fixed to an output shaft of an engine and a cover member of a starting device.

  Conventionally, as a drive plate for transmitting power from the engine to the starter, a plate member fixed to the crankshaft of the engine, an outer periphery to which the ring gear is fixed, and a plurality of extensions welded to the front cover of the starter An annular support member having a plurality of notches with open ends on the welded portion and the outer peripheral portion side, and an engagement formed on the outer peripheral surface so as to be positioned between two end surfaces intersecting the axis of the screw hole What contains the some nut which has a groove | channel is known (for example, refer patent document 1). In this drive plate, the plurality of nuts are inserted into the corresponding cutout portions so that the peripheral edge portion of the cutout portion of the annular support member is fitted into the engagement groove. The outer peripheral portion of the annular support member includes a plurality of arc-shaped outer wall portions projecting in the axial direction of the ring gear between the adjacent notch portions, and the insertion nut is positioned between the adjacent outer wall portions. Has a protrusion formed on the surface. Further, the ring gear is fixed to the outer peripheral portion of the annular support portion by welding so as to hold a plurality of nuts together with the annular support member. The welded portion between the ring gear and the outer periphery of the annular support member is defined in the vicinity of each insertion nut, and promotes penetration when welding the ring gear to the outer periphery of the annular support member in the vicinity of each insertion nut. Thus, the ring gear is joined to the outer wall portion of the annular support member and the insertion nut. The plate member fixed to the crankshaft and the annular support member fixed to the starting device are fastened to each other via a nut and a bolt screwed to the nut.

JP 2014-101966 A

  According to the conventional drive plate, the ring gear member can be fixed to the power transmission target side without using a set block, and the rotation of the insertion nut with respect to the annular support member can be satisfactorily suppressed, and a plurality of insertion nuts are annular It can be firmly held by the support member and the ring gear. However, if the ring gear is joined to the outer wall portion or the insertion nut of the annular support member by promoting the penetration during welding, the influence of heat on the annular support member may be increased. Therefore, the conventional drive plate still has room for improvement in terms of reducing the influence of heat input by welding.

  Accordingly, the main object of the present disclosure is to reduce the influence of heat input caused by welding on the connecting member that connects the cover member of the starting device and the drive plate.

  The connection member of the present disclosure is a connection member that connects a drive plate that has a connection hole and is fixed to the output shaft of the engine, and a cover member of the starting device, and has a through hole and is fixed to the cover member. A first nut including a plate member, a female screw portion into which a fastening bolt inserted into the connection hole of the drive plate is screwed, and a protruding portion that has a male screw portion and penetrates the through hole of the plate member Restricting rotation of one of the first nut member and the second nut member having a member, a female screw portion threadably engaged with the male screw portion of the projecting portion penetrating the through hole, and the plate member And a detent mechanism.

  According to this connecting member, the drive plate and the cover member are formed by screwing the fastening bolt inserted through the connecting hole of the drive plate into the female thread portion of the first nut member of the plate member fixed to the cover member of the starting device. And are connected. The plate member is formed with a through hole, and the first nut member includes a male screw portion and a protruding portion that penetrates the through hole. Further, a second nut member having a female threaded portion is screwed into the male threaded portion of the projecting portion that has penetrated the through hole, and the rotation preventing mechanism prevents any one of the first and second nut members from rotating with respect to the plate member. Be regulated. Accordingly, the first nut member to which the fastening bolt is screwed is welded to the plate member, and the first nut member is firmly fixed to the plate member and the rotation of the first nut member with respect to the plate member is restricted. can do. As a result, it is possible to satisfactorily reduce the influence of heat input by welding on the connecting member that connects the cover member of the starting device and the drive plate.

It is a schematic block diagram of the power transmission device containing the connection member of this indication. It is an expanded sectional view showing the power transmission device of this indication. It is a principal part expansion perspective view which shows the connection member of this indication. It is explanatory drawing which shows the 1st nut member contained in the connection member of this indication. It is explanatory drawing which shows the 2nd nut member contained in the connection member of this indication. It is an expanded sectional view showing a power transmission device containing a connection member of a modification in this indication. It is a principal part expansion perspective view which shows the connection member of the deformation | transformation aspect in this indication.

  Next, embodiments for carrying out the invention of the present disclosure will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a power transmission device 10 including a connecting member 30 of the present disclosure. A power transmission device 10 shown in the figure is connected to a crankshaft (output shaft) 2 of an engine (internal combustion engine) (not shown) as a drive source mounted vertically in a front portion of a rear wheel drive vehicle. Is transmitted to left and right rear wheels (drive wheels) (not shown). As shown in the figure, the power transmission device 10 includes a starting device (fluid transmission device) 12, an oil pump 17, an automatic transmission 20 that shifts the power transmitted from the engine to the input shaft 20i and transmits it to the output shaft 20o, and the like. including.

  The starting device 12 includes a front cover (cover member) 13 connected to a drive plate 3 fixed to the crankshaft 2 of the engine, and an input-side pump impeller 14p having a pump shell closely fixed to the front cover 13. The flow of hydraulic oil from the turbine runner 14t to the pump impeller 14p is arranged inside the turbine runner 14t on the output side, the pump impeller 14p, and the turbine runner 14t connected to the input shaft (input member) 20i of the automatic transmission 20. A torque converter (fluid transmission device) having a one-way clutch 14o that is supported by a stator shaft (not shown) and restricts the rotation direction of the stator 14s in one direction. Further, the starting device 12 includes a multi-plate lockup clutch 15 that connects the front cover 13 connected to the crankshaft 2 of the engine and the input shaft 20i of the automatic transmission 20 to each other and releases the connection therebetween, A damper mechanism 16 that attenuates vibration between the cover 13 and the input shaft 20 i of the automatic transmission 20 is included. The starting device 12 may include a fluid coupling that does not have the stator 14s. The lockup clutch 15 may be a single plate type lockup clutch.

  FIG. 2 is an enlarged cross-sectional view showing the power transmission device 10. As shown in the figure, the connecting member 30 is for connecting the drive plate 3 and the front cover 13 of the starting device 12. The drive plate 3 includes a disc-shaped plate portion 3p fastened (fixed) to the crankshaft 2 of the engine, and an annular ring gear portion 3r provided on the outer periphery of the plate portion 3p. In the present embodiment, the drive plate 3, that is, the plate portion 3p and the ring gear portion 3r are integrally formed by pressing a flexible plate material (metal plate) such as a cold rolled steel plate. However, the drive plate 3 may have a so-called two-divided structure including a ring gear portion 3r that is manufactured separately from the plate portion 3p using a ring gear manufacturing facility and is fixed to the outer periphery of the plate portion 3p. Good.

  The plate portion 3p of the drive plate 3 is formed with a central hole 3a into which the tip end portion of the crankshaft 2 is fitted, and a plurality of circumferentially spaced intervals (equal intervals) so as to surround the central hole 3a. Fastening holes 3b. As illustrated, the plate portion 3p is fastened to the crankshaft 2 of the engine by fastening bolts B2 inserted through the fastening holes 3b. In addition, a plurality of connecting holes 3c are formed on the outer peripheral portion of the plate portion 3p at intervals (equal intervals) along the ring gear portion 3r on the radially inner side of the ring gear portion 3r. The ring gear portion 3r has a plurality of external teeth and can mesh with a pinion gear (drive gear) of a cell motor (not shown) that cranks the engine.

  As shown in FIG. 2, the front cover 13 of the starting device 12 includes a center piece 13c and a cover body 130 fixed to the center piece 13c by welding. As shown in FIG. 2, the center piece 13 c is fitted into a recess formed at the tip of the crankshaft 2. The cover main body 130 includes an annular inner peripheral portion 131, an annular inner inclined wall portion 132, an annular first side wall portion 133, a first cylindrical wall portion 134, and an annular second side wall portion (radial wall portion). 135 and a second cylindrical wall 136.

  An inner peripheral portion 131 of the cover main body 130 extends in a direction orthogonal to the axis of the crankshaft 2, the starting device 12, and the front cover 13, and is joined to the outer peripheral portion of the center piece 13c. The inner inclined wall portion 132 extends obliquely outward in the radial direction from the inner peripheral portion 131 so as to increase in diameter toward the crankshaft 2 side. The first side wall 133 extends radially outward from the inner inclined wall 132 so as to extend in a direction perpendicular to the axis of the starting device 12 and the like. The first cylindrical wall portion 134 extends from the first side wall portion 133 to the side opposite to the crankshaft 2 side (the automatic transmission 20 side). The second side wall 135 extends radially outward from the first tubular wall 134 so as to extend in a direction orthogonal to the axis of the starting device 12 and the like. The second cylindrical wall portion 136 extends from the second side wall portion 135 to the side opposite to the crankshaft 2 side (automatic transmission 20 side) so as to extend in parallel with the axis of the starting device 12 or the like.

  A clutch hub 151 of the lockup clutch 15 is fixed to the inner surface of the first side wall 133 of the cover main body 130 by welding or the like. The clutch hub 151 is fitted with inner peripheral portions of a plurality of separator plates 152 (friction engagement plates) of the lockup clutch 15. A part of the clutch drum 153 of the lockup clutch 15 is inserted between the first cylindrical wall portion 134 of the front cover 13 and the clutch hub 151 in the radial direction. A part of the clutch drum 153 is fitted with inner peripheral portions of a plurality of friction plates 154 (friction engagement plates) of the lockup clutch 15. A plurality of separator plates 152 and friction plates 154 are alternately arranged as shown in the figure. Accordingly, at least a part of the separator plate 152 and the friction plate 154 is surrounded by the first cylindrical wall portion 134 of the front cover 13. The clutch drum 153 is connected to an input element (not shown) of the damper mechanism 16.

  As shown in FIG. 2, the connecting member 30 for connecting the drive plate 3 and the front cover 13 includes an annular plate member (set plate) 300, a first nut member 310, and a second nut member 320. Including. The plate member 300 is formed, for example, by pressing a steel material or the like, and has an annular inner peripheral portion 301, and an annular fixed portion 302 that extends radially outward and axially from the outer periphery of the inner peripheral portion 301. Have As shown in FIG. 3, a plurality of (for example, four) through holes 303 are formed in the inner peripheral portion 301 at intervals (equal intervals) in the circumferential direction. In the present embodiment, the through hole 303 is a two-sided width hole, and a pair of flat rotation restricting surfaces 303p is included in the inner peripheral surface defining the through hole 303.

  As shown in FIGS. 3 and 4, the first nut member 310 includes a nut portion 311 formed in a two-sided width nut shape, and a protruding portion 312 extending from the nut portion 311 in the axial direction. The first nut member 310 has a hole portion that penetrates the nut portion 311 and the protruding portion 312, and a fastening bolt B <b> 3 inserted through the connection hole 3 c of the drive plate 3 is screwed into the inner peripheral surface of the hole portion. An internal thread portion 313 is formed. In the present embodiment, the winding direction of the fastening bolt B3 and the female screw portion 313 is the right-handed screw direction. Further, the outer diameter of the seat surface of the nut portion 311 is set larger than the outer diameter of the seat surface of the fastening bolt B3. Further, the protruding portion 312 has a smaller diameter than the nut portion 311 and has an axial length longer than the thickness of the inner peripheral portion 301 of the plate member 300. Further, a male screw portion 314 is formed on the outer peripheral surface of the protruding portion 312. In the present embodiment, the winding direction of the male screw portion 314 is a left-handed screw direction opposite to the winding direction of the fastening bolt B3 and the female screw portion 313. The nut portion 311 may be formed in a polygonal nut shape or an elliptical nut shape.

  As shown in FIG. 5, the second nut member 320 includes a nut portion 321 formed in a hexagonal nut shape, and a short fitting portion 322 extending from the nut portion 321 in the axial direction. The second nut member 320 has a hole portion that penetrates the nut portion 321 and the fitting portion 322, and a male screw portion 314 formed on the protruding portion 312 of the first nut member 310 on the inner peripheral surface of the hole portion. A female screw portion 323 is formed to be screwed together. In the present embodiment, the winding direction of the female screw portion 323 is the left-handed screw direction. The fitting part 322 has a smaller diameter than the nut part 321 and has an axial length slightly shorter than the thickness of the inner peripheral part 301 of the plate member 300. In addition, the fitting portion 322 is formed in a two-face width nut shape that fits into the through hole 303 of the plate member 300, and a pair of flat rotation restricted surfaces 322p is included on the outer peripheral surface thereof. The nut portion 321 may be formed in a two-sided width nut shape, or may be formed in a polygonal nut shape other than a hexagonal shape or an elliptical nut shape.

  As shown in FIGS. 2 and 3, each through hole 303 of the plate member 300 is fitted with the fitting portion 322 of the second nut member 320 so that the rotation restricting surface 303p and the rotation restricted surface 322p are in contact with each other. Is done. Further, the male screw portion 314 of the protruding portion 312 of the first nut member 310 is screwed into the female screw portion 323 of the second nut member 320. That is, the female screw portion 323 of the second nut member 320 is screwed into the male screw portion 314 of the protruding portion 312 of the first nut member 310 that passes through the through hole 303. Thereby, a plurality of sets of first and second nut members 310 and 320 are firmly attached to the plate member 300. Further, the rotation restricting surface 303p of the plate member 300 and the rotation restricted surface 322p of the fitting portion 322 are rotations that restrict the rotation of the second nut member 320 and the first nut member 310 screwed thereto with respect to the plate member 300. Configure the regulation mechanism.

  After the first and second nut members 310 and 320 are mounted, the plate member 300 is fixed to the front cover 13 at an assembly plant of the starter device 12, for example. That is, as shown in FIG. 2, the inner peripheral portion 301 of the plate member 300 is fitted (inlay fitting) into an annular recess (cylindrical surface) formed in the first cylindrical wall portion 134 of the front cover 13. The fixing portion 302 is fixed to the boundary portion between the second side wall portion 135 and the second cylindrical wall portion 136 by welding (for example, arc welding). On the other hand, the drive plate 3 is fastened to the crankshaft 2 by fastening bolts B2 inserted through the fastening holes 3b of the plate portion 3p, for example, at an engine assembly plant or the like. Then, the drive plate 3 fixed to the crankshaft 2 and the starting device 12 are a plate in which the fastening bolt B3 inserted into the connection hole 3c of the drive plate 3 is fixed to the front cover 13 in an assembly plant of the vehicle. The first nut member 310 of the member 300 is connected by being screwed to the female thread portion 313.

  As described above, the through-hole 303 is formed in the plate member 300 of the connecting member 30, and the first nut member 310 includes the male screw portion 314 and the protruding portion 312 that passes through the through-hole 303. Further, the second nut member 320 (internal threaded portion 323) is screwed into the protruding portion 312 (internally threaded portion 314) that penetrates the through hole 303. Further, the second nut member 320 and the second nut member 320 are screwed into the second nut member 320 by a rotation restricting mechanism constituted by the rotation restricting surface 303p of the plate member 300 and the rotation restricted surface 322p of the second nut member 320 (fitting portion 322). The rotation of the 1 nut member 310 relative to the plate member 300 is restricted.

  Thereby, according to the connection member 30, while fixing the 1st nut member 310 with respect to the plate member 300, without welding the 1st nut member 310 by which the fastening bolt B3 is screwed together to the plate member 300, it is. The rotation of the first nut member 310 relative to the plate member 300 can be restricted. As a result, it is possible to satisfactorily reduce the influence of heat input by welding on the connecting member 30 that connects the front cover 13 and the drive plate 3 of the starting device 12.

  Further, in the connecting member 30, the winding direction of the fastening bolt B3 and the internal thread portion 313 of the first nut member 310 and the winding direction of the external thread portion 314 of the first nut member 310 and the internal thread portion 323 of the second nut member 320 are: The directions are opposite to each other. Accordingly, when the fastening bolt B3 is screwed to the first nut member 310 to connect the drive plate 3 and the front cover 13, the male screw portion 314 and the second nut member of the first nut member 310 that are fastened to each other. It is possible to satisfactorily suppress the loosening of the female screw portion 323 of 320.

  Further, the second nut member 320 has a fitting portion 322 fitted into the through hole 303 of the plate member 300, and the female screw portion 323 of the second nut member 320 has a diameter larger than the outer peripheral surface of the fitting portion 322. It is formed inside the direction. The rotation restricted surface 322p included in the outer peripheral surface of the fitting portion 322 of the second nut member 320 is a rotation preventing mechanism together with the rotation restricting surface 303p included in the inner peripheral surface that defines the through hole 303 of the plate member 300. Configure. Thereby, it is possible to satisfactorily restrict the rotation of the second nut member 320 and the first nut member 310 fastened to the plate member 300 while simplifying and compacting the rotation prevention mechanism.

  The drive plate 3 connected to the front cover 13 by the connecting member 30 has a plate portion 3p connected to the crankshaft 2 of the engine and a ring gear portion 3r formed integrally with the plate portion 3p by press working. Is. Since the cutting process of the ring gear and the welding process between the plate and the ring gear are not necessary, the manufacturing cost of the drive plate 3 can be greatly reduced.

  Further, the starting device 12 connected to the drive plate 3 by the connecting member 30 includes a multi-plate lockup clutch 15 having a plurality of separator plates 152 and friction plates 154, respectively. Further, the front cover 13 extends from the first side wall portion 133 so as to surround the first side wall portion 133 extending in a direction orthogonal to the axis of the starting device 12 and the separator plate 152 and the friction plate 154. The first cylindrical wall part 134 that is extended, the second side wall part 135 that extends radially outward from the first cylindrical wall part 134, and the second cylindrical wall that extends from the second side wall part 135 Part 136. The plate member 300 is welded to the front cover 13 such that the first and second nut members 310 and 320 are positioned on the radially outer side of the first cylindrical wall portion 134. Thus, the space around the starter 12 can be effectively utilized by effectively using the radially outer space of the first cylindrical wall portion 134 of the front cover 13 that tends to be a dead space in the starter 12 including the multi-plate lockup clutch 15. It is possible to further improve the space efficiency.

  In the connecting member 30, the winding direction of the fastening bolt B3 and the female threaded portion 313 of the first nut member 310 is the left-handed thread direction, and the male threaded portion 314 of the first nut member 310 and the female threaded portion 323 of the second nut member. The winding direction may be the right-handed screw direction. In the connecting member 30, the first nut member 310 is inserted into the through hole 303 of the plate member 300 from the starting device 12 side, and the second nut member 320 is fitted from the drive plate 3 side. It is not limited to this. That is, the first nut member 310 may be inserted into the through hole 303 of the plate member 300 from the drive plate 3 side, and the second nut member 320 may be fitted from the starter 12 side. Furthermore, the configuration of the rotation preventing mechanism is not limited to the one using the two-surface width as described above. That is, the through hole 303 may have a polygonal shape or an elliptical cross-sectional shape, and the fitting portion of the second nut member 320 may be formed in a polygonal nut shape or an elliptical nut shape, The anti-rotation mechanism may use a serration or the like. Further, the plate member 300 is not limited to an annular shape, and may be divided into a plurality of parts. Needless to say, the connecting member 30 can be applied to a power transmission device for a front wheel drive vehicle.

  6 is an enlarged cross-sectional view showing a power transmission device 10B including a connecting member 30B according to a modified embodiment of the present disclosure, and FIG. 7 is an enlarged perspective view of a main part showing the connecting member 30B. Note that, among the constituent elements of the connecting member 30B, the same elements as those of the connecting member 30 are denoted by the same reference numerals, and redundant description is omitted.

  The plate member 300B of the connecting member 30B shown in FIGS. 6 and 7 is formed in an annular shape, and has a ring gear portion 300r on the outer periphery that can mesh with a pinion gear (drive gear) of a cell motor (not shown) that cranks the engine. The drive plate 3B connected to the front cover 13 by the connecting member 30B corresponds to the drive plate 3 in which the ring gear portion 3r is omitted, and has only the plate portion 3p connected to the crankshaft 2 of the engine.

  The plate member 300B shown in FIGS. 6 and 7 has a fixed portion 302 fixed to the front cover 13 and a ring gear portion 300r formed integrally with the fixed portion 302 by pressing. Thus, by integrally forming the fixed portion 302 and the ring gear portion 300r by press molding, the manufacturing cost of the plate member 300B having the ring gear portion 300r can be greatly reduced. Furthermore, since it is not necessary to join the ring gear to the plate member 300B by welding, the influence of heat input during the manufacture of the plate member 300 can be reduced more favorably.

  Further, as shown in FIG. 7, the first nut member 310B included in the connecting member 30B also includes a nut portion 311 formed in a two-sided width nut shape, and a protruding portion extending from the nut portion 311 in the axial direction. 312B. The first nut member 310B also has a hole portion that penetrates the nut portion 311 and the protruding portion 312, and a fastening bolt B3 inserted through the connection hole 3c of the drive plate 3 is screwed into the inner peripheral surface of the hole portion. An internal thread portion 313 is formed. The nut portion 311 of the first nut member 310B may be formed in a polygonal nut shape or an elliptical nut shape. Further, the protruding portion 312 </ b> B has a smaller diameter than the nut portion 311 and has an axial length longer than the thickness of the inner peripheral portion 301 of the plate member 300. Furthermore, a male screw portion 314 is formed on the outer peripheral surface of the protruding portion 312B, and the base end portion of the protruding portion 312 has a two-surface width shape that fits into the through hole 303 of the plate member 300B as shown in the figure. It is formed to have. That is, the outer peripheral surface of the protruding portion 312 includes a pair of flat rotation restricted surfaces 312p positioned on the base end side (nut portion 311 side) with respect to the male screw portion 314.

  The second nut member 320 is a two-sided width nut having a female screw portion 323 into which the male screw portion 314 of the protruding portion 312B passing through the through hole 303 of the plate member 300B is screwed. As shown in FIG. 6, the outer diameter of the seating surface of the second nut member 320B is determined to be larger than the outer diameter of the seating surface of the fastening bolt B3. The second nut member 320B may be a polygonal nut or an elliptical nut.

  In the connecting member 30B as described above, the rotation preventing mechanism includes the rotation restricting surface 303p included in the inner peripheral surface defining the through hole 303 of the plate member 300B, and the protruding portion of the first nut member 310B rather than the male screw portion 314. It is comprised by the rotation controlled surface 312p formed in the outer peripheral surface of the said protrusion part 312B so that it may be located in the base end side of 312B. Even if such a detent mechanism is employed, the rotation of the first nut member 310B and the second nut member 320B fastened to the plate member 300B can be favorably rotated while simplifying and reducing the detent mechanism. It becomes possible to regulate.

  Also in the connecting member 30B, the winding direction of the fastening bolt B3 and the internal thread portion 313 of the first nut member 310B and the winding direction of the external thread portion 314 of the first nut member 310B and the internal thread portion 323 of the second nut member 320B are as follows. , The directions are opposite to each other. In the connecting member 30B, the first nut member 310B is inserted from the drive plate 3B side and the second nut member 320B is fitted from the starting device 12 side into the through hole 303 of the plate member 300B. It is not limited to this. That is, the first nut member 310B may be inserted from the starting device 12 side into the through hole 303 of the plate member 300B, and the second nut member 320B may be fitted from the drive plate 3B side. Furthermore, it goes without saying that the first nut member 310B and the second nut member 320B can also be applied to the connecting member 30. Further, the configuration of the rotation preventing mechanism is not limited to the one using the two-surface width as described above. Furthermore, the plate member 300B is not limited to an annular shape, and may be divided into a plurality of parts. Needless to say, the connecting member 30B can be applied to a power transmission device for a front wheel drive vehicle.

  As described above, the connecting member (30, 30B) of the present disclosure has the connecting hole (3c) and is fixed to the output shaft (2) of the engine, and the starting device (12). ), And a plate member (300, 300B) that has a through hole (303) and is fixed to the cover member (12), and the drive plate (3, 3). 3B) has a female screw part (313) into which a fastening bolt (B3) inserted through the connecting hole (3c) is screwed, and a male screw part (314), and the through hole of the plate member (300, 300B). A first nut member (310, 310B) including a protrusion (312, 312B) penetrating (303) and the protrusion (312, 312B) penetrating the through hole (303). One of the second nut member (320, 320B) having a female screw portion (323) screwed to the male screw portion (314) and the first and second nut members for the plate member (300, 300B) ( 320, 310B) and a detent mechanism (303p, 312p, 322p) for restricting the rotation of the motor.

  That is, according to the connecting member of the present disclosure, the fastening bolt inserted through the connecting hole of the drive plate is screwed into the female thread portion of the first nut member of the plate member fixed to the cover member of the starting device, The plate and the cover member are connected. The plate member is formed with a through hole, and the first nut member includes a male screw portion and a protruding portion that penetrates the through hole. Further, the second nut member (female screw portion) is screwed into a protruding portion (male screw portion) penetrating the through hole, and the rotation preventing mechanism prevents any one of the first and second nut members from rotating with respect to the plate member. Be regulated. Accordingly, the first nut member to which the fastening bolt is screwed is welded to the plate member, and the first nut member is firmly fixed to the plate member and the rotation of the first nut member with respect to the plate member is restricted. can do. As a result, it is possible to satisfactorily reduce the influence of heat input by welding on the connecting member that connects the cover member of the starting device and the drive plate.

  In addition, the winding direction of the female screw portion (313) of the fastening bolt (B3) and the first nut member (310, 310B), the male screw portion (314) of the first nut member (310, 310B), and the The winding direction of the female thread portion (3232) of the second nut member (320, 320B) may be opposite to each other. Thus, when the fastening bolt is screwed into the first nut member to connect the drive plate and the cover member, the male screw portion of the first nut member and the female screw portion of the second nut member that are fastened to each other are loosened. It becomes possible to suppress well.

  Further, the second nut member (320) may have a fitting portion (322) that is fitted into the through hole (303) of the plate member (300), and the second nut member (320). ) May be formed radially inward of the outer peripheral surface of the fitting portion (322), and the anti-rotation mechanism may serve as the through hole (303) of the plate member (300). The rotation restricting surface (303p) included in the inner peripheral surface that defines the shape and the rotation restricted surface (322p) included in the outer peripheral surface of the fitting portion (322) of the second nut member (320). May be. Thereby, it is possible to favorably regulate the rotation of the second nut member and the first nut member fastened to the plate member while simplifying and compacting the rotation preventing mechanism.

  Further, the rotation preventing mechanism includes the rotation restricting surface (303p) included in the inner peripheral surface defining the through hole (303) of the plate member (300) and the first screw thread portion (314) than the first threaded portion (314). You may comprise by the rotation controlled surface (312p) formed in the outer peripheral surface of this protrusion part (312B) so that it may be located in the base end side of the said protrusion part (312B) of a nut member (310B). Thereby, it is possible to favorably regulate the rotation of the first nut member and the second nut member fastened thereto with respect to the plate members while simplifying and reducing the rotation prevention mechanism.

  Further, the drive plate (3) includes a plate portion (3p) connected to the crankshaft (2) of the engine and a ring gear portion (3r) formed integrally with the plate portion (3p) by pressing. You may have. This eliminates the need for a ring gear cutting process, a welding process between the plate and the ring gear, and the like, so that the manufacturing cost of the drive plate can be greatly reduced.

  Furthermore, the plate member (300B) may be formed in an annular shape and may have a ring gear (300r) on the outer periphery that can mesh with a gear of a motor cranking the engine.

  The plate member (300B) includes a fixed portion (302) fixed to the cover member (13) and a ring gear portion (300r) formed integrally with the fixed portion (302) by press working. It may be a thing. Thereby, the manufacturing cost of the plate member which has a ring gear part can be reduced significantly. In addition, since it is not necessary to join the ring gear to the plate member by welding, the influence of heat input during the production of the plate member can be reduced more favorably.

  Further, the starting device (12) may include a multi-plate type lock-up clutch (15) having a plurality of friction engagement plates (152, 154), and the cover member (13) may include the starting device (12). ) And a first cylindrical wall extending from the side wall (133) so as to surround the friction engagement plate (152, 154). A portion (134), a radial wall portion (135) extending radially outward from the first cylindrical wall portion (134), and a second tube extending from the radial wall portion (135) The plate member (300, 300B) may be configured such that the first and second nut members (310, 310B, 320, 320B) are the first tubular wall portion (136). 134) so as to be located radially outside It may be welded to the timber (13). This effectively uses the space radially outside the first cylindrical wall portion of the cover member, which tends to be a dead space in a starting device including a multi-plate lockup clutch, and improves the space efficiency around the starting device. It becomes possible to improve.

  And the invention of this indication is not limited to the above-mentioned embodiment at all, and it cannot be overemphasized that various changes can be made within the range of the extension of this indication. Furthermore, the above-described embodiment is merely a specific form of the invention described in the Summary of Invention column, and does not limit the elements of the invention described in the Summary of Invention column.

  The invention of the present disclosure can be used in the manufacturing industry of a connecting member that connects a drive plate fixed to an output shaft of an engine and a cover member of a starting device.

 2 Crankshaft, 3, 3B drive plate, 3a center hole, 3b fastening hole, 3c connection hole, 3p plate part, 3r, 300r ring gear part, 10, 10B power transmission device, 12 starter device, 13 front cover, 13c centerpiece , 14o one-way clutch, 14p pump impeller, 14s stator, 14t turbine runner, 15 lock-up clutch, 16 damper mechanism, 17 oil pump, 20 automatic transmission, 20i input shaft, 20o output shaft, 30, 30B connecting member, 130 cover Main body, 131 Inner peripheral part, 132 Inner inclined wall part, 133 First side wall part, 134 First cylindrical wall part, 135 Second side wall part, 136 Second cylindrical wall part, 151 Clutch hub, 152 Separator plate, 153 Clutch drum, 154 Rubbing plate, 300, 300B plate member, 300r ring gear part, 301 inner peripheral part, 302 fixing part, 303 through hole, 303p rotation restricting surface, 310, 310B first nut member, 311 nut part, 312, 312B protruding part, 312p Rotation restricted surface, 313 female screw portion, 314 male screw portion, 320, 320B second nut member, 321 nut portion, 322 fitting portion, 322p Rotation restricted surface, 323 female screw portion, B2, B3 fastening bolt.

Claims (8)

A connecting member for connecting a drive plate having a connecting hole and fixed to the output shaft of the engine, and a cover member of the starting device,
A plate member having a through hole and fixed to the cover member;
A first nut member including a female screw portion into which a fastening bolt inserted into the connection hole of the drive plate is screwed, and a protruding portion that has a male screw portion and penetrates the through hole of the plate member;
A second nut member having a female threaded portion that is screwed into the male threaded portion of the protruding portion that has penetrated the through hole;
A detent mechanism for restricting rotation of any one of the first and second nut members relative to the plate member;
A connecting member comprising: The connecting member according to claim 1,
The winding direction of the female screw portion of the fastening bolt and the first nut member and the winding direction of the female screw portion of the first nut member and the female screw portion of the second nut member are opposite to each other. A connecting member. In the connecting member according to claim 1 or 2,
The second nut member has a fitting portion fitted into the through hole of the plate member,
The female thread portion of the second nut member is formed radially inward from the outer peripheral surface of the fitting portion,
The rotation preventing mechanism includes a rotation restricting surface included in an inner peripheral surface that defines the through hole of the plate member, and a rotation restricted surface included in an outer peripheral surface of the fitting portion of the second nut member. A connecting member characterized by comprising. In the connecting member according to claim 1 or 2,
The anti-rotation mechanism is positioned closer to the base end side of the protruding portion of the first nut member than the rotation restricting surface included in the inner peripheral surface that defines the through hole of the plate member and the male screw portion. And a rotation restricted surface formed on the outer peripheral surface of the projecting portion. In the connecting member according to any one of claims 1 to 4,
The drive plate includes a plate portion connected to a crankshaft of an engine and a ring gear portion formed integrally with the plate portion by pressing. In the connecting member according to any one of claims 1 to 4,
The said plate member is formed in cyclic | annular form, and has a ring gear which can mesh with the gear of the motor which cranks the said engine on the outer periphery. The connecting member according to claim 6,
The plate member has a fixed portion fixed to the cover member, and a ring gear portion formed integrally with the fixed portion by press working. In the connecting member according to any one of claims 1 to 7,
The starting device includes a multi-plate lockup clutch having a plurality of friction engagement plates,
The cover member is
A side wall extending in a direction perpendicular to the axis of the starting device;
A first tubular wall extending from the side wall so as to surround the friction engagement plate;
A radial wall extending radially outward from the first tubular wall;
A second cylindrical wall extending from the radial wall,
The connecting member, wherein the plate member is welded to the cover member such that the first and second nut members are positioned on the radially outer side of the first cylindrical wall portion.