JP6470608B2 - Vehicle drive device - Google Patents

Description

  The present invention relates to a vehicle drive device including a crankshaft.

  In order to connect a rotating body such as a torque converter to the crankshaft, a plate member such as a drive plate is provided between the crankshaft and the rotating body. In order to suppress the vibration of the crankshaft, a technique for fixing a weight to the plate member and a technique for forming a lightening portion on the plate member have been proposed (see Patent Document 1).

JP 2003-227548 A

  By the way, fixing the weight to the plate member and forming the thinned portion on the plate member are factors that break the rigidity balance of the plate member. Thus, breaking the rigidity balance of the plate member has been a factor for tilting a rotating body such as a torque converter. For this reason, it is required to suppress the tilting of the rotating body.

  An object of the present invention is to suppress tilting of a rotating body.

  A vehicle drive device according to the present invention is provided between a crankshaft that is rotatably provided in an engine and has a plurality of crankpins that support a connecting rod, and between the crankshaft and a rotating body that faces the crankshaft. A plate member that connects the crankshaft and the rotating body, and the plate member has a first connecting portion and a rigidity lower than that of the first connecting portion as the connecting portion connected to the rotating body. A second connecting portion, wherein the first connecting portion is disposed on the same phase side of the crank pins disposed on the rotating body side among the plurality of crank pins, and the second connecting portion is disposed on the plurality of crank pins. It arrange | positions among the pins at the reverse phase side of the crankpin arrange | positioned at the said rotary body side.

  According to this invention, the plate member which connects a crankshaft and a rotary body is provided with a 1st connection part and a 2nd connection part with lower rigidity than this as a connection part connected with a rotary body. A 1st connection part is arrange | positioned at the same phase side of the crankpin arrange | positioned at the rotary body side among several crankpins, and a 2nd connection part is the reverse of the crankpin arrange | positioned at the rotary body side among several crankpins. Arranged on the phase side. Thereby, tilting of a rotary body can be suppressed.

It is the schematic which shows the power unit which is one embodiment of this invention from upper direction. It is sectional drawing which shows the connection structure of a crankshaft and a torque converter. FIG. 3 is a front view showing a drive plate alone from the direction of arrow A in FIG. 2. It is the schematic which shows the positional relationship of a crankshaft and a drive plate. (A)-(d) is an image figure which shows the centrifugal force which acts on a drive plate. It is an image figure which shows the vibration condition of the crankshaft with which the drive plate of the reference example was connected. It is an image figure which shows the vibration condition of the crankshaft with which the drive plate was connected. It is a schematic diagram which shows the drive plate of a comparative example. (A) And (b) is an image figure which shows the tilting condition of the torque converter with which the drive plate of the comparative example was connected. It is the elements on larger scale which expand each connection part of a drive plate. It is a schematic diagram which shows a drive plate. (A) And (b) is an image figure which shows the tilting condition of the torque converter with which the drive plate was connected. It is a front view which shows the drive plate which concerns on other embodiment of this invention alone. It is the elements on larger scale which expand each connection part of a drive plate. (A) is sectional drawing of the 1st connection part in alignment with the AA line of FIG. 14, (b) is sectional drawing of the 2nd connection part in alignment with the BB line of FIG. 14, (c) is It is sectional drawing of the 3rd connection part in alignment with CC line of FIG.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a power unit (vehicle drive device) 10 according to an embodiment (Embodiment 1) of the present invention from above. As shown in FIG. 1, a power unit 10 mounted on a vehicle has an engine 11 and a transmission 12 connected to the engine 11. A journal bore 14 is formed in the cylinder block 13 constituting the engine 11, and a crankshaft 15 is rotatably supported on the journal bore 14 via a bearing metal (not shown). The illustrated engine 11 is a horizontally opposed four-cylinder engine.

  The crankshaft 15 has a plurality of crank journals J1 to J5 provided at the rotation center, and a plurality of crank throws T1 to T4 connecting the crank journals J1 to J5. The crank throws T1 to T4 include crank pins P1 to P4 that are eccentric from the center of rotation, and a crank arm 20 that connects the crank journals J1 to J5 and the crank pins P1 to P4. A connecting rod 21 is supported on the crank pins P <b> 1 to P <b> 4, and a piston 22 is connected to the connecting rod 21. The crank throws T1 to T4 are provided with balance weights 23 extending to the opposite phase side of the crank pins P1 to P4. Further, an output flange 24 is provided at one end of the crankshaft 15, and an accessory drive shaft 25 is provided at the other end of the crankshaft 15. A crank pulley 26 is attached to the accessory drive shaft 25.

  FIG. 2 is a cross-sectional view showing a connection structure between the crankshaft 15 and the torque converter 30. As shown in FIG. 2, a plurality of screw holes 24 a are formed in the output flange 24 of the crankshaft 15. A central portion 31 a of the drive plate 31 is fixed to the output flange 24 using fastening bolts 32. The torque converter 30 is provided with a pump shell 33 that constitutes an outer shell, and an attachment portion 34 having a screw hole 34 a is fixed to the outer peripheral surface of the pump shell 33. An outer peripheral portion 31 b of the drive plate 31 is fixed to the mounting portion 34 of the pump shell 33 using fastening bolts 35. That is, the crankshaft 15 and the torque converter (rotating body) 30 facing the crankshaft 15 in the axial direction are connected to each other via the drive plate (plate member) 31. A through hole 36 for inserting the fastening bolt 32 is formed in the central portion 31a of the drive plate 31, and a through hole 37 for inserting the fastening bolt 35 is formed in the outer peripheral portion 31b of the drive plate 31. Yes.

  The torque converter 30 includes a pump impeller 40 that is fixed to the pump shell 33, and a turbine runner 41 that faces the pump impeller 40. The torque converter 30 includes a stator 42, and the stator 42 is disposed between the pump impeller 40 and the turbine runner 41. A turbine hub 43 is connected to the turbine runner 41, and a turbine shaft 44 is connected to the turbine hub 43. A transmission mechanism 46 in the mission case 45 is connected to the turbine shaft 44 that is an output shaft of the torque converter 30. The pump shell 33 of the torque converter 30 is supported by the transmission case 45 via a bearing 47. The torque converter 30 that is a sliding element is provided with a lock-up clutch 48 that connects the pump shell 33 and the turbine shaft 44.

[Drive plate structure]
Next, the structure of the drive plate 31 connected to the crankshaft 15 will be described. FIG. 3 is a front view showing the drive plate 31 alone from the direction of arrow A in FIG. FIG. 4 is a schematic view showing the positional relationship between the crankshaft 15 and the drive plate 31. FIG. 4 schematically shows a cross section taken along line AA of FIG. 5A to 5D are image diagrams showing centrifugal force acting on the drive plate 31. FIG. 5A to 5D show the rotation state of the drive plate 31 that rotates together with the crankshaft 15 every 90 °.

  As shown in FIGS. 3 and 4, the drive plate 31 has a plurality of openings 60 penetrating in the thickness direction. Many of these openings 60 are arranged on the same phase side of the crankpin P4. That is, in the drive plate 31, a portion located on the same phase side of the crankpin P <b> 4 is configured as a lightening portion 61 having a large number of openings 60. In the drive plate 31, a portion located on the opposite phase side of the crankpin P <b> 4 is configured as an inertia mass portion 62 with a small number of openings 60. The crankpin P4 is a crankpin arranged on the torque converter 30 side among the crankpins P1 to P4.

  Thus, by providing the drive plate 31 with the inertia mass portion 62, the center of gravity of the drive plate 31 is shifted to the opposite phase side of the crankpin P4. That is, the drive plate 31 has an unbalanced shape in which the center of gravity deviates from the rotation center C1 to the opposite phase side of the crank pin P4. As a result, as indicated by an arrow α in FIGS. 5A to 5D, the centrifugal force of the drive plate 31 rotating together with the crankshaft 15 is opposite to that of the crankpin P4 with respect to the output flange 24 of the crankshaft 15. It acts on the phase side, that is, on the inertial mass 62 side. As shown in FIG. 4, the same phase side of the crankpin P4 is a side closer to the crankpin P4 than the reference line L1, and the opposite phase side of the crankpin P4 is a crankpin than the reference line L1. It is the side away from P4. The reference line L1 is a straight line that is orthogonal to a straight line L2 that connects the rotation center C1 of the crankshaft 15 and the shaft center C2 of the crankpin P4 and passes through the rotation center C1 of the crankshaft 15.

[Crankshaft vibration suppression]
Next, after describing the vibration generated in the crankshaft 15 using a reference example, the vibration suppression of the crankshaft 15 by the drive plate 31 will be described. FIG. 6 is an image diagram showing a vibration state of the crankshaft 15 to which the drive plate 100 of the reference example is connected. FIG. 7 is an image view showing a vibration state of the crankshaft 15 to which the drive plate 31 is connected. A drive plate 100 whose center of gravity coincides with the center of rotation is connected to the crankshaft 15 shown in FIG. 6, parts that are the same as the parts shown in FIG. 1 are given the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 6, when the crankshaft 15 rotates, the inertial forces of the connecting rod 21 and the piston 22 act on the crankpins P1 to P4 as indicated by white arrows. At the rotation angle of the crankshaft 15 shown in the figure, the center portion of the crankshaft 15 is urged in the direction of arrow A, and both ends of the crankshaft 15 are urged in the direction of arrow B. Deforms into a convex arch. When the crankshaft 15 further rotates 180 °, the central portion of the crankshaft 15 is urged in the direction of arrow B, and both ends of the crankshaft 15 are urged in the direction of arrow A. Deforms into a convex arcuate shape. Such a bow-shaped deformation of the crankshaft 15 was repeated, and the crankshaft 15 was vibrated.

  Therefore, as shown in FIG. 7, the power unit 10 of the first embodiment is provided with an unbalanced drive plate 31. By fixing the drive plate 31 to the crankshaft 15, a centrifugal force can be applied to the crankshaft 15 on the opposite phase side of the crankpin P4. That is, as shown in FIG. 7, the centrifugal force α can be generated at the output flange 24 of the crankshaft 15 so as to cancel the inertial force β of the crankpin P4. Thereby, the displacement of the crank journal J5 can be suppressed, and the vibration of the crankshaft 15 can be suppressed. Further, the crank pulley 26 connected to the crankshaft 15 is provided with a weight 27 on the opposite phase side of the crankpin P1. Thereby, the displacement of the crank journal J1 can be suppressed, and the vibration of the crankshaft 15 can be suppressed.

  As described above, the vibration of the crankshaft 15 can be suppressed by the centrifugal force of the drive plate 31 by using the unbalanced drive plate 31. However, the unbalanced drive plate 31 often loses its rigidity balance. As described above, the loss of the rigidity balance of the drive plate 31 is a factor that inhibits the uniform deformation of the drive plate 31 and a factor that tilts the torque converter 30.

[Tilting situation of torque converter]
Next, after the tilt of the torque converter 30 is described with reference to a comparative example, the tilt suppression of the torque converter 30 by the drive plate 31 will be described. FIG. 8 is a schematic view showing a drive plate 200 of a comparative example. FIGS. 9A and 9B are image diagrams showing a tilting state of the torque converter 30 to which the drive plate 200 of the comparative example is connected. Note that the rotation angle of the crankshaft 15 shown in FIG. 9A and the rotation angle of the crankshaft 15 shown in FIG. 9B are shifted from each other by 180 °. 8 and 9, parts similar to those described in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, the crankshaft 15 and the torque converter 30 are connected to each other via a drive plate 200. Like the drive plate 31 described above, the drive plate 200 includes a low-rigidity lightening portion 61 located on the same phase side of the crankpin P4 and a high-rigidity inertia mass portion located on the opposite phase side of the crankpin P4. 62. By the way, since oil is supplied into the torque converter 30, as indicated by an arrow F in FIG. 8, thrust toward the crankshaft 15 is acting on the torque converter 30. As a result, the drive plate 200 connecting the crankshaft 15 and the torque converter 30 is urged in the axial direction by the torque converter 30. Here, since the unbalanced drive plate 200 includes a high-rigidity inertial mass portion 62 and a low-rigidity lightening portion 61, the lightening portion 61 is more easily deformed than the inertial mass portion 62. Have. Therefore, as shown by the arrow X1 in FIGS. 9A and 9B, when the crankshaft 15 rotates, the lightening portion 61 is deformed more greatly than the inertia mass portion 62, and the torque converter 30 is tilted. It was repeated.

[Drive plate connection structure]
Therefore, the drive plate 31 according to the first embodiment has a “connecting portion structure” that suppresses the inclination of the torque converter 30. Hereinafter, the “connecting portion structure” of the drive plate 31 will be described. As shown in FIG. 3, the outer peripheral portion 31 b of the drive plate 31 is provided with a plurality of connecting portions 71 to 74 that are connected to the torque converter 30. The drive plate 31 is provided with a first connecting portion 71 disposed on the same phase side of the crankpin P4 and a second connecting portion 72 disposed on the opposite phase side of the crankpin P4 as connecting portions. Yes. Further, the drive plate 31 is provided with a third connection part 73 and a fourth connection part 74 arranged on the reference line L1 described above as connection parts. These connecting portions 71 to 74 are arranged in the order of the first connecting portion 71, the third connecting portion 73, the second connecting portion 72, and the fourth connecting portion 74 in the circumferential direction of the drive plate 31. The connecting portions 71 to 74 are arranged at equal intervals in the circumferential direction with respect to the drive plate 31.

  FIG. 10 is a partial enlarged view in which the connecting portions 71 to 73 of the drive plate 31 are enlarged. Since the 3rd connection part 73 and the 4th connection part 74 have the same structure, the three connection parts 71-73 except the 4th connection part 74 are shown by FIG. As shown in FIG. 10, openings 71 a to 73 a are formed adjacent to each of the first to third connecting portions 71 to 73. The opening 71 a adjacent to the first connecting portion 71 is formed smaller than the openings 72 a and 73 a adjacent to the second and third connecting portions 72 and 73. Further, the opening 72 a adjacent to the second connecting portion 72 is formed larger than the openings 71 a and 73 a adjacent to the first and third connecting portions 71 and 73. Further, the opening 73 a adjacent to the third connecting portion 73 is formed larger than the opening 71 a adjacent to the first connecting portion 71 and smaller than the opening 72 a adjacent to the second connecting portion 72.

  As described above, since the sizes of the openings 71a to 73a change, the rigidity of the first to third connection parts 71 to 73 is the same as that of the first connection part 71, the third connection part 73, and the second connection part 72. The values are set lower in order. That is, the rigidity of the first connecting part 71 is set higher than the rigidity of the second and third connecting parts 72 and 73, and the rigidity of the second connecting part 72 is the rigidity of the first and third connecting parts 71 and 73. Is set lower. Further, the rigidity of the third connecting portion 73 is set lower than the rigidity of the first connecting portion 71 and higher than the rigidity of the second connecting portion 72. As described above, since the fourth connecting portion 74 has the same structure as the third connecting portion 73, the rigidity of the third connecting portion 73 and the fourth connecting portion 74 is set to substantially the same value. That is, like the third connection portion 73, the rigidity of the fourth connection portion 74 is set to be lower than the rigidity of the first connection portion 71 and higher than the rigidity of the second connection portion 72.

[Torque converter tilt control]
FIG. 11 is a schematic diagram showing the drive plate 31. FIGS. 12A and 12B are image diagrams showing a tilting state of the torque converter 30 to which the drive plate 31 is connected. Note that the rotation angle of the crankshaft 15 shown in FIG. 12A and the rotation angle of the crankshaft 15 shown in FIG. 12B are shifted from each other by 180 °.

  As described above, the drive plate 31 includes the low-rigidity thinning portion 61, the high-rigidity inertia mass portion 62, the high-rigidity first connection portion 71, and the low-rigidity second connection portion 72. And the lightening part 61 and the 1st connection part 71 are arrange | positioned at the same phase side of the crankpin P4. Moreover, the inertia mass part 62 and the 2nd connection part 72 are arrange | positioned at the reverse phase side of the crankpin P4. That is, as shown in FIG. 11, a low-rigidity lightening portion 61 and a high-rigidity first connection portion 71 are provided on one side of the drive plate 31, and on the other side of the drive plate 31, A high-rigidity inertial mass portion 62 and a low-rigidity second connecting portion 72 are provided. As described above, the tilting of the torque converter 30 can be suppressed by combining the lightening portion 61 and the first connecting portion 71 and combining the inertia mass portion 62 and the second connecting portion 72.

  That is, when the torque converter 30 is energized by the drive plate 31, as shown by an arrow X1 in FIGS. 12 (a) and 12 (b), the lightening portion 61 of the drive plate 31 is deformed to be larger than the inertia mass portion 62. To do. However, since the low-rigidity second connecting portion 72 is provided on the side of the high-rigidity inertia mass portion 62 with a small deformation amount so as to compensate for the deformation amount, the arrow X2 in FIGS. 12 (a) and 12 (b). As shown, the second connecting portion 72 can be deformed to increase the amount of deformation on the inertial mass portion 62 side. That is, one side of the drive plate 31 is obtained by combining the low rigidity thinning portion 61 and the high rigidity first connecting portion 71 and combining the high rigidity inertia mass portion 62 and the low rigidity second connecting portion 72. And the other side can be made closer to each other, so that the tilt of the torque converter 30 can be suppressed. Thereby, the load of the various components which comprise the power unit 10 can be reduced, and durability of the power unit 10 can be improved.

  In the above description, the rigidity of the third connection part 73 and the fourth connection part 74 is set lower than the rigidity of the first connection part 71 and higher than the rigidity of the second connection part 72. There is no limit. If the unbalanced drive plate 31 can be uniformly deformed, the rigidity of the third connecting part 73 and the fourth connecting part 74 may be set to be higher than the rigidity of the first connecting part 71, You may set below the rigidity of the 2nd connection part 72. FIG. In the above description, the rigidity is changed by changing the shapes of the connecting portions 71 to 74, but the present invention is not limited to this. For example, you may change the rigidity of each connection part 71-74 by changing the material, thickness, etc. of each connection part 71-74.

[Embodiment 2]
Hereinafter, other embodiments of the present invention will be described. FIG. 13 is a front view showing a drive plate (plate member) 80 according to another embodiment (Embodiment 2) of the present invention alone. In FIG. 13, parts that are the same as the parts shown in FIG. 3 are given the same reference numerals, and descriptions thereof are omitted.

  As shown in FIG. 13, the outer peripheral portion 31 b of the drive plate 80 is provided with a plurality of connecting portions 81 to 84 configured by a leaf spring member 85. The drive plate 80 includes a first connection portion 81 disposed on the same phase side of the crankpin P4 as a connection portion connected to the torque converter 30, and a second connection portion disposed on the opposite phase side of the crankpin P4. 82 are provided. Further, the drive plate 80 is provided with a third connecting portion 83 and a fourth connecting portion 84 that are disposed on the above-described reference line L1 as connecting portions. These connecting portions 81 to 84 are arranged in the order of the first connecting portion 81, the third connecting portion 83, the second connecting portion 82, and the fourth connecting portion 84 in the circumferential direction of the drive plate 80. The connecting portions 81 to 84 are arranged at equal intervals in the circumferential direction with respect to the drive plate 80.

  FIG. 14 is a partially enlarged view in which the connecting portions 81 to 83 of the drive plate 80 are enlarged. 15A is a cross-sectional view of the first connecting portion 81 taken along the line AA in FIG. 14, and FIG. 15B is a cross-sectional view of the second connecting portion 82 taken along the line BB in FIG. FIG. 15C is a cross-sectional view of the third connecting portion 83 taken along the line CC of FIG. In addition, since the 3rd connection part 83 and the 4th connection part 84 have the same structure, the three connection parts 81-83 except the 4th connection part 84 are shown by FIG.

  As shown in FIGS. 14 and 15, the first connecting portion 81 is constituted by three leaf spring members 85, the second connecting portion 82 is constituted by one leaf spring member 85, and the third connecting portion 83 is It is composed of two leaf spring members 85. In each of the connecting portions 81 to 84, both end portions of the leaf spring member 85 are fixed to the outer peripheral portion 31 b of the drive plate 80 using rivet members 86. Further, a through hole 37 into which the fastening bolt 35 is inserted is formed at the center of the leaf spring member 85.

  Thus, since the number of leaf spring members 85 constituting each of the connecting portions 81 to 83 is changed, the rigidity of the first to third connecting portions 81 to 83 is the first connecting portion 81, the third connecting portion 83, The second connecting portion 82 is set to be lower in order. That is, the rigidity of the first connecting portion 81 is set higher than the rigidity of the second and third connecting portions 82 and 83, and the rigidity of the second connecting portion 82 is the rigidity of the first and third connecting portions 81 and 83. Is set lower. The rigidity of the third connecting portion 83 is set to be lower than the rigidity of the first connecting portion 81 and higher than the rigidity of the second connecting portion 82. As described above, since the fourth connecting portion 84 has the same structure as the third connecting portion 83, the rigidity of the third connecting portion 83 and the fourth connecting portion 84 is set to substantially the same value. That is, like the third connection portion 83, the rigidity of the fourth connection portion 84 is set to be lower than the rigidity of the first connection portion 81 and higher than the rigidity of the second connection portion 82.

  As described above, the drive plate 80 includes the low-rigidity lightening part 61, the high-rigidity inertial mass part 62, the high-rigidity first connection part 81, and the low-rigidity second connection part 82. Yes. And the lightening part 61 and the 1st connection part 81 are arrange | positioned at the same phase side of the crankpin P4. Moreover, the inertia mass part 62 and the 2nd connection part 82 are arrange | positioned at the reverse phase side of the crankpin P4. As described above, the drive plate described above is obtained by combining the low-rigidity lightening portion 61 and the high-rigidity first connection portion 81 and combining the high-rigidity inertia mass portion 62 and the low-rigidity second connection portion 82. As in the case of 31, the tilt of the torque converter 30 can be suppressed using the drive plate 80.

  In the above description, the rigidity of the third connecting part 83 and the fourth connecting part 84 is set lower than the rigidity of the first connecting part 81 and higher than the rigidity of the second connecting part 82. There is no limit. If the unbalanced drive plate 80 can be uniformly deformed, the rigidity of the third connecting part 83 and the fourth connecting part 84 may be set to be higher than the rigidity of the first connecting part 81, You may set below the rigidity of the 2nd connection part 82. FIG. In the above description, the rigidity is changed by changing the number of leaf spring members 85 constituting each of the connecting portions 81 to 84, but the present invention is not limited to this. For example, you may change the rigidity of each connection part 81-84 by changing the material, shape, etc. of the leaf | plate spring member 85 which comprise each connection part 81-84.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the above description, a horizontally opposed four-cylinder engine is used as the engine 11, but the present invention is not limited to this, and other types of engines in which the number of cylinders and the cylinder arrangement are changed may be adopted. good. In the above description, the torque converter 30 is used as the rotating body, but the present invention is not limited to this. For example, a clutch housing constituting a starting clutch may be employed as the rotating body, and a flywheel may be employed as the rotating body.

  In the above description, the four connecting portions 71 to 74 and 81 to 84 are illustrated as the connecting portions connected to the torque converter 30, but are not limited to this. For example, two connecting portions 71, 72, 81, and 82 may be provided on the drive plates 31 and 80, and three or more connecting portions may be provided on the drive plates 31 and 80. In the above description, the inertia mass portion 62 is formed in the drive plates 31 and 80 by adjusting the position, size, and shape of the opening 60 formed in the drive plates 31 and 80. It is not limited to. For example, the inertia mass portion may be formed on the drive plates 31 and 80 by fixing a weight member to the drive plates 31 and 80 on the opposite phase side of the crankpin P4.

  In the above description, the balance weight 23 is provided in each of the crank throws T1 to T4 of the crankshaft 15. However, the present invention is not limited to this. Since the inertia force acting on the crank pin P4 can be reduced by the unbalanced drive plates 31, 80, the balance weight 23 of the crank throw T4 may be reduced or reduced. Similarly, since the inertial force acting on the crankpin P1 can be reduced by the weight 27 of the crank pulley 26, the balance weight 23 of the crank throw T1 may be reduced or reduced.

10 Power unit (vehicle drive unit)
11 Engine 15 Crankshaft 21 Connecting rod 30 Torque converter (rotating body)
31 Drive plate (plate member)
62 Inertial mass portion 71 First connecting portion 72 Second connecting portion 73 Third connecting portion 74 Fourth connecting portion 80 Drive plate (plate member)
81 1st connection part 82 2nd connection part 83 3rd connection part 84 4th connection part P1-P4 Crank pin

Claims (5)

A crankshaft that is rotatably provided in the engine and is formed with a plurality of crankpins that support the connecting rod;
A plate member provided between the crankshaft and a rotating body opposed to the crankshaft in an axial direction, and connecting the crankshaft and the rotating body;
Have
The plate member includes a first connecting portion and a second connecting portion having a lower rigidity than the first connecting portion as a connecting portion connected to the rotating body,
The first connecting portion is disposed on the same phase side of the crank pins disposed on the rotating body side among the plurality of crank pins,
The second connecting portion is a vehicle drive device that is disposed on an opposite phase side of a crank pin that is disposed on the rotating body side among the plurality of crank pins. The vehicle drive device according to claim 1,
The said plate member is a vehicle drive device provided with an inertial mass part in the reverse phase side of the crankpin arrange | positioned at the said rotary body side among these crankpins. The vehicle drive device according to claim 1 or 2,
The plate member includes a third connecting part and a fourth connecting part as a connecting part connected to the rotating body,
The vehicle drive device, wherein rigidity of the third connecting part and the fourth connecting part is lower than that of the first connecting part and higher than that of the second connecting part. The vehicle drive device according to claim 3,
The connecting part connected to the rotating body is arranged in the order of the first connecting part, the third connecting part, the second connecting part, and the fourth connecting part in the circumferential direction of the plate member. Drive device. In the vehicle drive device according to any one of claims 1 to 4,
The vehicle drive device, wherein the rotating body is a torque converter.

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