JP2000088077A - Torque converter mounting structure of drive plate for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque converter mounting structure of a drive plate for vehicle, which can reduce emission of cranking sounds when the engine is in the starting operation. SOLUTION: A torque converter 7 mounting structure of a drive plate for vehicle is configured with a disc-shaped web 10 formed from a metal sheet and equipped in the central part with a crankshaft mounting part 11, a torque converter mounting part 50 formed at the periphery of the web 10, a ring-shaped rim 30 formed by thickening the peripheral edge of the web 10, and a ring gear 40 formed on the peripheral surface of the rim 30 continuously. An upright surface 22 perpendicular to the axis is formed on the whole peripheral circumference of the drive plate between its web 10 and rim 30, and at the periphery of the torque converter 7, an upright surface 8c perpendicular to the axis is formed on its whole circumference at the same radial position as the first named upright surface 22, and these surfaces 22 and 8c of the drive plate and torque converter 7 are abutted to each other over the whole circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque converter mounting structure for a vehicle drive plate for connecting a crankshaft of a vehicle engine and a torque converter mounted on an automatic transmission.

[0002]

2. Description of the Related Art Many recent vehicles have a structure in which rotation of an engine crankshaft is transmitted to an axle via a torque converter. The rotation of the crankshaft is controlled by a drive plate attached to the engine. The power is transmitted to the converter.

[0003] A conventional vehicle drive plate is formed from a disk-shaped metal plate, and has a mounting portion for a crankshaft of an engine formed in a central portion and a mounting portion for a torque converter near an outer peripheral portion. Is formed. Further, the outer peripheral portion of the vehicle drive plate meshes with a pinion gear that rotates by the action of a starter motor when the engine is started,
A ring-shaped member formed on the outer peripheral surface of a gear for rotating a crankshaft of an engine is integrally fixed by welding, bolting, or the like (for example, JP-A-2-93153 and JP-A-1-65557).

FIGS. 5 and 6 show an example of a conventional drive plate for a vehicle.
Is formed from a metal plate and has a disc-shaped web portion 2, a torque converter mounting portion 3 formed at several places on the same circumference at an outer peripheral portion of the web portion 2, and a central portion of the web portion 2. And a crankshaft mounting portion 2a. The drive plate 1 and the ring gear 5 formed on the outer peripheral surface of the ring-shaped member 4 together with the torque converter 7
Is fixed to the converter shell 8. The ring gear 5 is set so as to mesh with a pinion gear (not shown) by the action of a starter motor when the engine is started, and to disengage with the pinion gear when the engine rotates. Maximum torque is applied when starting.

[0005] A crankshaft mounting portion 2a formed at the center of the web portion 2 is fixed to a flange portion 6b of the crankshaft 6 by a crankshaft mounting bolt 6a via a reinforcement plate 61. A torque converter mounting nut 3b is fixed to the mounting hole of the drive plate 1 as the torque converter mounting portion 3 on the same axis by welding or the like.

On the front F side of the torque converter 7,
A converter shell 8 is attached, and the converter shell 8 is formed by plastic working from a thin metal plate.

At the center of the converter shell 8, a boss portion 8g projecting toward the drive plate 1 is formed. The boss portion 8g is formed at the center of the crankshaft mounting portion 2a of the drive plate 1 at the center thereof. It is set to be inserted into the hole 2b.

Further, on the outer peripheral portion of the converter shell 8,
Nut 3 for mounting torque converter on drive plate 1
A projecting portion 8e projecting outward is formed at a position facing b. A mounting hole 8f for inserting the torque converter mounting bolt 7b is formed in the projecting portion 8e.

[0009] Then, the torque converter mounting bolt 7b inserted into the mounting hole 8f is inserted into the mounting hole of the ring-shaped member 4 and screwed to the torque converter mounting nut 3b of the drive plate 1, whereby the drive plate 1 and the torque converter mounting nut 7b are screwed. Ring gear 5 is attached to torque converter 7.

[0010]

By the way, recently, the outer peripheral portion of the drive plate is thickened to form an annular rim portion, and a ring gear is formed by rolling a gear on the outer peripheral surface of the rim portion. Molding has come to be used. However, in the drive plate in which the ring gear is integrally formed, the rigidity of the rim portion in which the gear is formed is weaker than when the ring-shaped member 4 is used.

Therefore, when the pinion gear of the starter motor meshes with and rotates with the ring gear when the engine is started, the rim vibrates, and the vibration of the rim is transmitted to the web to vibrate the entire drive plate. (Cranking sound) worsened.

The situation of this cranking sound is "kin"
The sound is a metal sound such as "kin", and the sound in the high frequency region (portion indicated by A) gives discomfort to a person as shown in FIG. In FIG. 8, the horizontal axis indicates the frequency of the cranking sound, and the vertical axis indicates the magnitude of the cranking sound. In FIG. 8, the sound generated in the low-frequency region is a meshing sound generated by teeth colliding with each other due to a meshing rotation of the ring gear and the pinion gear and a sound generated by vibration of the rim portion.

Conventionally, as a countermeasure for lowering the level of the metallic noise, a vibration damping plate is attached to the web portion 2 of the drive plate 1 almost entirely, but in this conventional example, the weight increases and the cost increases. Problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. It is an object of the present invention to reduce the cranking noise by attenuating the vibration generated in the web portion of the drive plate. Another object of the present invention is to provide a torque converter mounting structure for a drive plate for a vehicle, which can reduce the weight and cost.

[0015]

According to a first aspect of the present invention, there is provided a torque converter mounting structure for a drive plate for a vehicle, which is formed from a metal plate and has a crankshaft mounting portion at a central portion. Disk-shaped web portion, a torque converter mounting portion formed near the outer peripheral portion of the web portion, a ring-shaped rim portion formed by increasing the outer peripheral edge of the web portion, and the rim portion A vehicle drive plate comprising a ring gear formed continuously on the outer peripheral surface of the vehicle, and a mounting structure for a torque converter,
An upright surface perpendicular to the axis is formed all around the circumferential direction between the web portion and the rim portion of the drive plate, and the outer periphery of the torque converter is orthogonal to the axis on the same radius as the upright surface of the drive plate. The upright surface is formed on the entire circumference in the circumferential direction, and the upright surface of the torque converter is in contact with the upright surface of the drive plate over the entire circumference.

According to a second aspect of the present invention, there is provided a torque converter mounting structure for a vehicle drive plate, wherein a flange-shaped upright surface is formed orthogonal to an axis on an outer peripheral portion of a bowl-shaped converter shell mounted on a front side of the torque converter. The drive plate has a web portion formed in a bowl shape along the bowl shape of the converter shell, and a corner formed between the upright surface of the drive plate and the web portion stands upright with the outer peripheral portion of the converter shell. It is characterized in that it fits into a corner formed by a surface.

According to the first aspect of the invention, the upright surface of the torque converter and the upright surface of the drive plate are brought into contact over the entire circumference. Vibration transmitted to the web portion from the rim portion of the drive plate at the time of starting the engine can be attenuated. As a result, the vibration of the web portion of the drive plate is reduced, the high-frequency sound of a metal sound level such as "kin" or "kin" in the high-frequency region is reduced, and the sound quality of the cranking sound can be improved.

Further, according to the torque converter mounting structure for a vehicle drive plate of the present invention, the corners formed on the drive plate are fitted to the corners of the torque converter, so that the drive plate at the time of starting the engine is driven. The vibration transmitted from the rim part to the web part can be further attenuated, which further reduces the vibration of the drive plate, further reduces the generation of metal-level sound in the high-frequency range, and improves the sound quality of cranking sound. It can be further improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 show the first embodiment.
FIG. 4 shows a torque converter mounting structure of the vehicle drive plate according to the second embodiment, and FIG. 4 shows a torque converter mounting structure of the vehicle drive plate according to the second embodiment;
Components common to those of the conventional example shown in FIGS. 6 and 7 are denoted by the same reference numerals, and detailed description thereof will be omitted.

First, the configuration of the first embodiment will be described with reference to FIGS.

The vehicle drive plate E is formed from a metal plate and has a disk-shaped web portion 10 having a crankshaft mounting portion 11 at the center, and a torque converter formed near the outer periphery of the web portion 10. It comprises an attachment portion 50, a ring-shaped rim portion 30 formed by increasing the outer peripheral edge of the web portion 10, and a ring gear 40 formed continuously on the outer peripheral surface of the rim portion 30. The torque converter 7 is mounted on the torque converter mounting portion 50 of the drive plate E.

Then, the web portion 1 of the drive plate E
An upright surface 20 perpendicular to the axis is formed on the entire circumference in the circumferential direction between the rim portion 30 and the rim portion 30 and an upright surface perpendicular to the axis on the same radius as the upright surface 20 of the drive plate E on the outer periphery of the torque converter 7. 8c is formed over the entire circumference.
The upright surface 8c of the torque converter 7 and the upright surface 20 of the drive plate E are brought into contact over the entire circumference.

Further, the configuration of the first embodiment of the present invention will be described in detail.

The vehicle drive plate E is formed into a disk shape by plastic working from a thin metal plate, and has a web portion 10 formed in a bowl shape along the bowl shape of a converter shell 8 described below of the torque converter 7. And this web part 1
0 is bent substantially in an L-shape in a direction perpendicular to the axis to form an upright surface 22 formed over the entire circumference.
A rim portion 30 formed by pushing the outer peripheral edge of the rim in the radial direction to increase the thickness in the thickness direction;
And a ring gear 40 continuously formed by rolling or the like on the outer peripheral surface of the ring gear 40.

The web portion 10 has a crankshaft mounting portion 11 formed at the center thereof.
A plurality of, for example, five, crankshaft mounting holes 12 are formed equally on the same circumference, and a positioning hole 12a for positioning with respect to the crankshaft 6 is formed. A crankshaft mounting bolt 6 a is screwed into the crankshaft mounting hole 12 via a reinforcement plate 61. In the center of the crankshaft mounting portion 11, a through hole 1 is provided.
The boss 8g formed at the center of the converter shell 8 attached to the front F side of the torque converter 7 is fitted into the through hole 13.

In the outer peripheral portion of the web portion 10, a plurality of, for example, six mounting holes 17 are formed on the upright surface 22 at equal intervals on the same circumference.
A torque converter mounting nut 18 is fixed to the front F side edge of the mounting hole 17 on the same axis by welding or the like to form a torque converter mounting portion 50. Thus, when the torque converter 7 is mounted on the drive plate E, the upright surface 22 of the web portion 10 and the upright surface 8c of the converter shell 8 are set so as to abut almost entirely over the entire circumferential direction.

The drive plate E is fixed to the flange 6b of the crankshaft 6 by a crankshaft mounting bolt 6a inserted into each crankshaft mounting hole 12, and is mounted to the torque converter 7. The torque converter 7 is mounted on the drive plate E by screwing the torque converter mounting bolts 7b inserted into the mounting holes 8f of the converter shell 8 to the torque converter mounting nuts 50 of the drive plate E. Thereby, the upright surface 22 of the drive plate E is
And the upright surface 8c of the converter shell 8 are fixed in close contact with each other.

In FIGS. 1 and 2, reference numerals 14 and 15 denote additional holes formed in the web portion 10 for reducing the weight and improving the sound-vibration performance, and 16 denotes an engine hole attached to the web portion 10 by welding. This is a sensor plate for setting ignition timing.

According to the mounting structure of the torque converter 7 of the vehicle drive plate E of the first embodiment configured as described above, the upright surface 22 of the web portion 10 on the drive plate E side is attached to the torque converter 7. Since the converter shell 8 comes into contact with the upright surface 8c formed on the outer peripheral portion of the attached converter shell 8 substantially entirely over the entire circumferential direction,
Vibration generated in the ring gear 40 when the engine is started can be attenuated from being transmitted to the web portion 10 via the rim portion 30. As a result, the vibration of the web portion 10 of the drive plate E is reduced, and as shown by B in FIG. 3, the metal sound level in a high-frequency region that gives a person a discomfort compared to the conventional example shown by A in FIG. The generation of high-frequency sound can be reduced, and the sound quality of cranking sound can be improved. Further, since the vicinity of the rim portion 30 is in contact with the converter shell 8, the vibration of the rim portion 30 can be attenuated, the generation of sound in a low frequency region is reduced, and the volume of the cranking sound is reduced. be able to. In FIG. 3, as in FIG. 8, the horizontal axis indicates the frequency of the cranking sound, and the vertical axis indicates the magnitude of the cranking sound.

Further, since there is no need to attach a vibration damping plate as in the prior art, the weight can be reduced and the cost can be reduced.

Next, the configuration of the second embodiment will be described with reference to FIG.

In the second embodiment, the corner 23 formed on the side of the crankshaft mounting portion 11 of the web portion 10 of the drive plate E, that is, the horizontal plane 21 of the bowl-shaped web portion 10 is formed. And the upright surface 22 are formed in a shape corresponding to the shape of the corner portion 8b formed by the outer peripheral horizontal portion 8d and the upright surface 8c of the converter shell 8 formed in a bowl shape. When the torque converter 7 is mounted on the drive plate E as described above, the corner 23 on the drive plate E side is fitted to the corner 8b on the torque converter 7 side. As a result, the vibration transmitted from the ring gear 40 of the drive plate E at the time of starting the engine is further attenuated, and the vibration of the web portion 10 of the drive plate E is further reduced. Further, the sound quality of the cranking sound can be further improved.

[0033]

According to the first aspect of the present invention, the upright surface of the torque converter and the upright surface of the drive plate are brought into contact over the entire circumference, so that the engine is started. Vibration transmitted to the web portion from the rim portion of the drive plate at the time can be damped. As a result, the vibration of the web portion of the drive plate is reduced, and the sound of the metal sound level such as “kin” or “kin” in the high frequency region is reduced, and the sound quality of the cranking sound can be improved.

According to the vehicle drive plate torque converter mounting structure of the second aspect, the corners formed on the drive plate are fitted to the corners of the torque converter, so that the rim of the drive plate at the time of starting the engine is provided. The vibration transmitted from the section to the web can be further attenuated, further reducing the vibration of the drive plate, further reducing the generation of metal-level sound in the high-frequency range, and further improving the sound quality of cranking sound. Can be done.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a vehicle drive plate according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1, showing a state in which a torque converter is attached to the vehicle drive plate.

FIG. 3 is a diagram showing a relationship between the magnitude of a cranking sound generated in the vehicle drive plate and the frequency thereof.

FIG. 4 is an explanatory sectional view corresponding to FIG. 2 according to a second embodiment of the present invention;

FIG. 5 is an explanatory front view of a vehicle drive plate according to a conventional example.

FIG. 6 is an explanatory sectional view taken along the line VI-VI of FIG. 5, showing a state where the torque converter is attached to the vehicle drive plate.

FIG. 7 is an explanatory front view of the converter shell.

FIG. 8 is a diagram showing a relationship between the magnitude of a cranking sound generated in the vehicle drive plate and the frequency thereof.

[Explanation of symbols]

 7 Torque Converter 8 Converter Shell 8b Corner 8c Upright Surface 8f Mounting Hole 10 Web 11 Crankshaft Mounting 17 Mounting Hole 22 Upright 23 Angular 30 Rim 40 Ring Gear 50 Torque Converter Mounting E Vehicle Drive Plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Otani 1-4-1 Chuo, Wako-shi, Saitama Prefecture Inside Honda R & D Co., Ltd. (72) Inventor Nobuo Takemasa 1-4-1 Chuo, Wako-shi, Saitama Inside Honda R & D Co., Ltd. (72) Inventor Toshimitsu Shinohara 1-4-1 Chuo, Wako City, Saitama Prefecture Inside Honda R & D Co., Ltd.

Claims (2)

[Claims] 1. A disk-shaped web portion formed from a metal plate and having a crankshaft mounting portion at a center portion, a torque converter mounting portion formed on an outer peripheral portion of the web portion, and an outer portion of the web portion. A mounting structure for a vehicle drive plate including a ring-shaped rim formed by increasing the thickness of a peripheral edge, a ring gear continuously formed on an outer peripheral surface of the rim, and a torque converter, An upright surface perpendicular to the axis is formed all around the circumferential direction between the web portion and the rim portion of the drive plate, and an upright surface perpendicular to the axis on the outer periphery of the torque converter on the same radius as the upright surface of the drive plate. A drive plate for a vehicle, wherein an upright surface of the torque converter and an upright surface of the drive plate are brought into contact over the entire circumference. Torque converter mounting structure. 2. A bowl-shaped converter shell mounted on the front side of the torque converter, wherein a flange-shaped upright surface is formed at right angles to an axis at an outer peripheral portion, and a web portion of the drive plate is formed into a bowl shape of the converter shell. And a corner formed between the upright surface of the drive plate and the web portion is fitted to a corner between the outer peripheral portion of the converter shell and the upright surface. The torque converter mounting structure for a vehicle drive plate according to claim 1, wherein: