JP2016191461A - Connection member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a connection member for connecting a cover member of a start device to a drive plate to the cover member without conducting welding process.SOLUTION: A connection member 30 connects a drive plate 3 with a front cover 13 of a start device 12 and includes: a through hole 32 having a female screw part 32f with which a fastening bolt B3 inserted into a connection hole 3c of the drive plate 3 is engaged; a first protruding part 33 which is formed into a cylindrical shape so as to define an opening part of the through hole 32 and inserted into a through hole 133h from the inner side of the front cover 13; a cylindrical second protruding part 34 shorter than a thickness of a side wall part 133 which is formed so as to enclose the first protruding part 33; and an annular groove 35 defined between the first protruding part 33 and the second protruding part 34. A seal member 36 is disposed in the annular groove 35. An end part of the first protruding part 33 is crushed so as to closely contact with an outer surface of the front cover 13.SELECTED DRAWING: Figure 4

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, a pump impeller connected to a front cover (cover member), a turbine runner connected to an output element, a stator in which a one-way clutch is incorporated in the inner periphery, and a rear side of the turbine runner and the front A starting device having a multi-plate lockup clutch that connects a cover and an output element is known (see, for example, Patent Document 1). This kind of starting device generally has a set block fixed to the front cover, and is connected to the engine by screwing a bolt inserted into the connection hole of the drive plate into the set block.

JP 2013-072552 A

  The set block as described above is fixed to the cover member of the starting device by welding such as arc welding, but the cover member may be deformed by heat by welding the set block. If the cover member is deformed by heat, it is necessary to perform an additional process or a distortion removing process after welding, resulting in an increase in cost.

  Therefore, the main object of the present disclosure is to enable a connecting member for connecting the cover member of the starting device to the drive plate to be fixed to the cover member without a welding process.

  The connection member of the present disclosure is a connection member that has a connection hole and connects the drive plate fixed to the output shaft of the engine and the cover member of the starting device, and is inserted through the connection hole of the drive plate. A through hole formed in the cover member from the inside of the cover member, which is formed in a cylindrical shape so as to define a through hole having a female screw portion into which a bolt is screwed, and an opening of the through hole. A first protrusion inserted into the hole, a cylindrical second protrusion shorter than a thickness of the cover member formed so as to surround the first protrusion, the first protrusion, and the second protrusion An annular groove defined between the projecting portion, a seal member is disposed in the annular groove so as to contact the inner surface of the cover member, and the first projecting portion includes the through hole. The first protrusion penetrating and protruding from the through hole End parts is characterized push be crushed so closely to the outer surface of the cover member.

  When connecting the drive plate and the cover member of the starting device using this connecting member, a seal groove is disposed in the annular groove, and the first projecting portion is inserted through a through hole formed in the cover member. Further, the first protrusion passes through the through hole of the cover member, and the end of the first protrusion protruding from the through hole is crushed so as to be in close contact with the outer surface of the cover member. Thereby, the seal member in the annular groove is crushed by the inner surface of the cover member and comes into close contact with the inner surface and the bottom surface of the annular groove. As a result, the gap between the connecting member and the cover member is sealed very well by the seal member that is in close contact with the inner surface of the cover member and the bottom surface of the annular groove, and the connecting member is firmly fixed to the cover member (caulking). )be able to. Therefore, the connecting member for connecting the starting device to the drive plate can be firmly fixed to the cover member without a welding process. In addition, in this connecting member, the end portion of the first protruding portion protruding from the through hole can be used as a cutting allowance for adjusting the distance between the drive plate and the cover member.

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 a power transmission device containing a connection member of this indication. It is sectional drawing which shows the connection member of this indication. It is a principal part expanded sectional view which shows the power transmission device containing the connection member of this indication. It is a principal part expanded sectional 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 body 130 includes an annular inner peripheral portion 131, an annular inner inclined wall portion 132, an annular side wall portion 133, and a cylindrical wall portion 134.

  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 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 cylindrical wall portion 134 extends from the side wall portion 133 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.

  Further, the clutch hub 151 of the lockup clutch 15 is fixed to the inner surface of the 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 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. The clutch drum 153 is connected to an input element (not shown) of the damper mechanism 16.

  The connecting member 30 for connecting the drive plate 3 and the front cover 13 is formed by forging a steel material or the like. As shown in FIG. 3, the connecting member 30 is formed in a cylindrical shape so as to define a substantially bottomed cylindrical main body 31, a through hole 32 formed in the main body 31, and an opening of the through hole 32. The first projecting portion 33 formed, the cylindrical second projecting portion 34 formed so as to surround the first projecting portion 33, and the first projecting portion 33 and the second projecting portion 34 are defined between the first projecting portion 33 and the second projecting portion 34. An annular groove 35 to be formed.

  On the inner peripheral surface of the through-hole 32 of the main body 31, a female screw portion 32 f is formed to which a fastening bolt B 3 inserted through the connection hole 3 c of the drive plate 3 is screwed. The first protruding portion 33 protrudes in the axial direction from the end surface of the main body 31 and has an axial length longer than the thickness of the side wall portion 133 of the front cover 13. The second protruding portion 34 protrudes in the axial direction from the end surface of the main body 31 and has an axial length shorter than the thickness of the side wall portion 133 of the front cover 13. As shown by a dotted line in FIG. 3, a seal member 36 such as an O-ring is disposed in the annular groove 35.

  A plurality of through holes 133h are formed in the front cover 13 connected to the drive plate 3 by the connecting member 30 at intervals (equal intervals) in the circumferential direction. Each through-hole 133h has an inner diameter slightly larger than the outer diameter of the first protrusion 33 of the connecting member 30, and is formed in the outer peripheral side region of the side wall 133 of the front cover 13 as shown in FIG. The And the 1st protrusion part 33 of the connection member 30 is penetrated from the inner side of the front cover 13 by each through-hole 133h. Prior to insertion of the first protrusion 33 into the through hole 133h, the seal member 36 is disposed in the annular groove 35 of the connecting member 30.

  As described above, since the first projecting portion 33 has an axial length longer than the thickness of the side wall portion 133, the end portion of the first projecting portion 33 is outward (drive plate 3) via the through hole 133 h. Project to the side). And the edge part of the 1st protrusion part 33 which protruded from the through-hole 133h is crushed so that it may closely_contact | adhere to the outer surface of the side wall part 133 (front cover 13), as shown in FIG. Accordingly, the seal member 36 in the annular groove 35 is crushed by the inner surface of the side wall portion 133 of the front cover 13 and comes into close contact with the inner surface and the bottom surface of the annular groove 35. As a result, the gap between the connecting member 30 and the front cover 13 is very well sealed by the seal member 36 that is in close contact with the inner surface of the front cover 13 and the bottom surface of the annular groove 35, and the connecting member 30 is attached to the front cover 13. It can be firmly fixed (caulked). As a result, the connecting member 30 for connecting the starting device 12 to the drive plate 3 can be firmly fixed to the front cover 13 without a welding process.

  Moreover, in this embodiment, the connection member 30 is arrange | positioned at the radial direction outer side of the lockup clutch 15 of the start apparatus 12, as shown in FIG. In this way, by arranging the connecting member 30 in the radially outer space of the multi-plate lockup clutch 15 that tends to be a dead space, the size of the starting device 12 can be suppressed and the front side via the connecting member 30 can be suppressed. The cover 13 can be connected to the drive plate 3. And the end part of the 1st protrusion part 33 which protruded from the through-hole 133h is made into the drive plate 3 by protruding the end part of the 1st protrusion part 33 of the connection member 30 from the through-hole 133h, and crushing (caulking). And a cutting allowance for adjusting the distance between the front cover 13 and the front cover 13.

  The starting device 12 including the front cover 13 to which the connecting member 30 is mounted as described above is carried into a vehicle assembly plant or the like after assembly is completed. Further, 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, in an engine assembly factory. The drive plate 3 fixed to the crankshaft 2 and the starting device 12 are connected to the front cover 13 by fastening bolts B3 inserted into the connection holes 3c of the drive plate 3 in an assembly plant of the vehicle. It connects with screwing in the internal thread part 32f of the member 30. FIG.

  FIG. 5 is an enlarged cross-sectional view showing a main part of a connecting member 30B according to a modified embodiment of the present disclosure. In the connecting member 30B shown in FIG. 5, the arrangement of the seal member 36 in the annular groove 35 is omitted. Further, the first projecting portion 33 of the connecting member 30B has an outer diameter larger than that of the through hole 133h of the front cover 13, and is press-fitted into the corresponding through hole 133h. Furthermore, the first protrusion 33 of the connecting member 30B is configured not to protrude from the through hole 133h to the drive plate 3 side.

  When the first projecting portion 33 of the connecting member 30B is press-fitted into the through hole 133h of the front cover 13, the second projecting portion 34 having a lower profile than the first projecting portion 33 is formed on the side wall portion 133 of the front cover 13. Cut into the inside. Along with this, the surplus wall of the side wall part 133 (front cover 13) enters the annular groove 35 between the first projecting part 33 and the second projecting part 34. As described above, when the first protrusion 33 is press-fitted into the through-hole 133h, the second protrusion 34 bites into the inner surface of the side wall part 133 and the surplus wall of the side wall part 133 enters the annular groove 35. Can be firmly fixed to the front cover 13 (caulking), and the outer peripheral surface of the first projecting portion 33 can be brought into close contact with the inner peripheral surface of the through hole 133h to seal the gap therebetween. As a result, the connecting member 30 for connecting the starting device 12 to the drive plate 3 can be firmly fixed to the front cover 13 without a welding process.

  Needless to say, the connecting members 30 and 30B can be applied to a power transmission device for a front wheel drive vehicle.

  As described above, the connecting member (30) of the present disclosure has the connecting hole (3c) and is fixed to the output shaft (2) of the engine, and the cover member of the starting device (12). (13) is a connecting member that has a female threaded portion (32f) into which a bolt (B3) inserted into the connecting hole (3c) of the drive plate (3) is screwed. 32) and a through hole formed in the cover member (13) from the inside of the cover member (13) so as to define an opening of the through hole (32). 133h) and a cylindrical second protrusion shorter than the thickness of the cover member (13, 133) formed so as to surround the first protrusion (33). Part (34), the first protrusion (33) and the first An annular groove (35) defined between the protrusion (34) and a seal member (35) in the annular groove (35) so as to contact the inner surface of the cover member (13, 133). 36) is disposed, the first protrusion (33) passes through the through hole (133h), and the end of the first protrusion (33) protruding from the through hole (133h) The member (13, 133) is crushed so as to be in close contact with the outer surface.

  That is, when the drive plate and the cover member of the starting device are connected using this connecting member, a seal groove is disposed in the annular groove, and the first projecting portion is inserted through a through hole formed in the cover member. . Further, the first protrusion passes through the through hole of the cover member, and the end of the first protrusion protruding from the through hole is crushed so as to be in close contact with the outer surface of the cover member. Thereby, the seal member in the annular groove is crushed by the inner surface of the cover member and comes into close contact with the inner surface and the bottom surface of the annular groove. As a result, the gap between the connecting member and the cover member is sealed very well by the seal member that is in close contact with the inner surface of the cover member and the bottom surface of the annular groove, and the connecting member is firmly fixed to the cover member (caulking). )be able to. Therefore, the connecting member for connecting the starting device to the drive plate can be firmly fixed to the cover member without a welding process. In addition, in this connecting member, the end portion of the first protruding portion protruding from the through hole can be used as a cutting allowance for adjusting the distance between the drive plate and the cover member.

  Another connecting member (30B) of the present disclosure includes a drive plate (3) having a connecting hole (3c) and fixed to the output shaft (2) of the engine, and a cover member (13) of the starting device (12). A through-hole (32) having a female screw portion (32f) into which a bolt (B3) inserted into the connection hole (3c) of the drive plate (3) is screwed. It is formed in a cylindrical shape so as to define the opening of the through hole (32), and is press-fitted into the through hole (133h) formed in the cover member (13) from the inside of the cover member (13). First protrusion (33) to be formed and a cylindrical second protrusion (34) shorter than the thickness of the cover member (13, 133) formed so as to surround the first protrusion (33) And the first protrusion (33) and the second protrusion (34). Characterized in that it comprises an annular groove (35) defined between the.

  That is, when the first projecting portion of the connecting member is press-fitted into the through hole formed in the cover member, the second projecting portion having a lower profile than the first projecting portion bites into the inner surface of the cover member. Then, the excess thickness of the cover member enters an annular groove defined between the first protrusion and the second protrusion. As a result, the connecting member can be firmly fixed to the cover member (caulked), and the outer peripheral surface of the first protrusion can be brought into close contact with the inner peripheral surface of the through hole to seal the gap between them. As a result, it is possible to firmly fix the connecting member for connecting the starting device to the drive plate to the cover member without a welding process.

  The starting device (12) may include a multi-plate lockup clutch (15), and the connecting member (30, 30B) may be disposed radially outside the lockup clutch (15). Good. That is, in a starting device that includes a multi-plate lockup clutch, the radially outer space of the lockup clutch tends to be a dead space. Therefore, by disposing the connecting member on the radially outer side of the lockup clutch, it is possible to connect the cover member of the starting device to the drive plate via the connecting member while suppressing an increase in the size of the starting device. .

  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 Drive plate, 3a Center hole, 3b Fastening hole, 3c Connection hole, 3p Plate part, 3r Ring gear part, 10 Power transmission device, 12 Starting device, 13 Front cover, 13c Center piece, 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, 31 body, 32 through-hole, 32f Female thread part, 33 1st protrusion part, 34 2nd protrusion part, 35 annular groove, 36 seal member, 130 cover body, 131 inner peripheral part, 132 inner inclined wall part, 133 side wall part, 133h through-hole, 134 cylindrical shape Wall, 151 Clutch hub, 15 Separator plates, 153 the clutch drum, 154 friction plate, B2, B3 fastening bolts.

Claims (3)

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 through-hole having a female thread portion into which a bolt inserted into the connection hole of the drive plate is screwed;
A first protrusion that is formed in a cylindrical shape so as to define an opening of the through-hole, and is inserted from the inside of the cover member into the through-hole formed in the cover member;
A cylindrical second protrusion that is shorter than the thickness of the cover member formed to surround the first protrusion;
An annular groove defined between the first protrusion and the second protrusion,
A seal member is disposed in the annular groove so as to contact the inner surface of the cover member,
The first projecting portion penetrates the through hole, and an end portion of the first projecting portion projecting from the through hole is crushed so as to be in close contact with an outer surface of the cover member. . 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 through-hole having a female thread portion into which a bolt inserted into the connection hole of the drive plate is screwed;
A first protrusion that is formed in a cylindrical shape so as to define an opening of the through-hole, and is press-fitted into the through-hole formed in the cover member from the inside of the cover member;
A cylindrical second protrusion that is shorter than the thickness of the cover member formed to surround the first protrusion;
A connecting member comprising: an annular groove defined between the first protrusion and the second protrusion. In the set plate according to claim 1 or 2,
The starting device includes a multi-plate lockup clutch,
A connecting member, which is disposed radially outside the lock-up clutch.

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