JPS5825908B2 - Power transmission device equipped with a fluid coupling mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power transmission device equipped with a fluid coupling mechanism.

Conventionally, regarding power transmission devices having a fluid coupling mechanism,
Many proposals have been made, but all of them have the problem that vibration is likely to occur due to the axial play of the knob shaft in the fluid coupling mechanism, which increases the vibration and noise level of the vehicle body.

The present invention aims to solve these problems, and by eliminating the play in the axial direction of the knob shaft in the fluid coupling mechanism, it is possible to reduce the vibration and noise level of the vehicle body and improve ride comfort. An object of the present invention is to provide a power transmission device having a fluid coupling mechanism.

Therefore, the power transmission device equipped with the fluid coupling mechanism of the present invention includes the fluid coupling mechanism provided at the end of the crankshaft, and the fluid coupling mechanism is connected to the impeller shell attached to the crankshaft and the impeller shell. a cover formed integrally with the turbine blade and covering the turbine blade; a knob shaft having the turbine blade and disposed coaxially with the crankshaft; an inwardly projecting end of the knob shaft and the cover; A bearing is installed between the bearing and an adapter seal that is attached to the cover and has an inner circumferential surface that comes into contact with the bubble shaft. It is characterized in that a position adjustment member is interposed between the two.

Further, the power transmission device equipped with the fluid coupling mechanism of the present invention includes: an impeller shell attached to the crankshaft, a cover integrally formed with the impeller shell and covering the turbine blade; a hub axle having a turbine blade and disposed coaxially with the crankshaft; an adapter seal attached to the cover and having an inner peripheral surface that comes into contact with the hub axle; and the adapter seal and the hub axle. and a mechanical seal part interposed between the hub shaft and the mechanical seal part, and the mechanical seal part is provided with an elastic member capable of pressing the hub shaft in the axial direction and absorbing vibrations in the axial direction of the hub shaft. It is characterized by

Hereinafter, a power transmission device equipped with a fluid coupling mechanism as an embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional view thereof, and FIGS. 2 and 3 show its elastic members. FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof.

As shown in FIG. 1, a drive plate 2 is fastened to the rear end of the engine crankshaft 1 with bolts 3, so that the drive plate 2 rotates together with the crankshaft 1. It has become.

Note that a ring gear 2p for starting that meshes with the starter motor is integrally provided on the peripheral edge of the drive plate 2.

Furthermore, a fluid coupling mechanism, that is, a fluid coupling F is provided between the drive plate 2 with the crankshaft 1 and the flywheel 5 as a clutch wheel that constitutes the clutch mechanism C with the main drive shaft 4 on the transmission side. It has been intervened.

This fluid coupling F is composed of an impeller shell 1 having a pump blade 6, a hub shaft 9 having a turbine blade 8, and a ring 5 cover 10 etc. that is integrally formed with the impeller shell I and covering the turbine blade 8. However, the mounting structure of each member will be explained in detail below.

The impeller shell γ forms part of the casing of the fluid coupling F, and has a gap G in the drive plate 2.
1 and is fixed with bolts 11.

Further, on the outer wall surface of the impeller shell 1, a plurality of fan blades 12 which also serve as cooling fins are provided radially along the radial direction.

Therefore, the fan blade 12 is provided between the drive plate 2 and the impeller shell 1.

Furthermore, the drive route 2 has a plurality of air inlets 2a.
A curved edge 2a' is formed in each air inlet 2a as a fan blade that can guide air into the gap G1 as the drive plate 20 rotates.

Therefore, when the crankshaft 1 rotates and the drive plate 2 rotates, the impeller shell 1 also rotates together with the crankshaft 1 and the drive plate 2, thereby converting the air into cooling air into the air inlet 2a of the drive plate 2. The fluid can be supplied to the outer wall surface of the impeller shell 1 through the gap G1, and as a result, combined with the effect of the fan blades 12 as cooling fins, the fluid coupling F can be efficiently cooled.

Note that the gap G1 is preferably formed to be as narrow as possible.

The fan blade 12 can also be attached to the drive plate 2.

In this way, the impeller shell 1 is provided close to the drive plate 2 to form a narrow gap G1, and a plurality of pump blades 6 are attached to the peripheral edge of the inner wall of the impeller shell 1. pump blade 6
An impeller guide 13 is attached to the impeller shell 1 for guiding the oil along the curved inner edge 6a of the drive plate 2, thereby forming a curved shape with the impeller shell 1 disposed closely along the drive plate 2. Since a corner S that can be filled with oil is formed between the impeller guide 13 and the impeller guide 13, this corner S is used as an oil reserve tank A.

Furthermore, a return hole 14 is formed in the impeller guide 13 so that the oil filled in the oil reserve tank A can be returned to the space in which the pump blade 6 is disposed.

Further, turbine blades 8 are arranged opposite to these pump blades 6, and these turbine blades 8 are attached to a hub shaft 9 via a turbine blade connecting member 15.

By the way, the cover 10 is formed integrally with the impeller shell 1 so as to cover the turbine blade 8 with the hub shaft 9, and thus the cover 10 also constitutes the negative part of the casing of the fluid coupling F. In the space surrounded by the impeller shell I and the cover 10, an oil reserve tank A formed at the corner part S mentioned above and another oil reserve tank B are formed.

On the outer wall surface of this cover 10, a plurality of fan blades 1 which also serve as cooling fins are provided along the radial direction.
6 are provided radially.

In addition, the flywheel 5 is attached to the hub axle 9 so as to form a gap G2 between the flywheel 5 and the cover 10 by directly tightening the end faces of the rear end face of the hub axle 9 via the pin rests 17. Further, the flywheel 5 is formed with a plurality of air inlets 5a.

Therefore, when the cover 10 rotates due to the rotation of the crankshaft 1, air can be supplied as cooling air to the outer wall surface of the cover 10 through the air inlet 5a of the flywheel 5 and the gap G2. Coupled with the effect of the cooling fins, the fluid coupling F can be efficiently cooled.

Note that the gap G2 is also preferably formed to be as narrow as possible, similar to the gap G1 described above.

Further, the air inlet 5a of the flywheel 5 may be formed with a curved edge as a fan blade that can guide air to the gap G2 as the flywheel 50 rotates. The cooling effect of F can be further improved.

Furthermore, by attaching the fan blade 16 to the outer wall surface of the cover 10 and attaching another fan blade that also serves as a cooling fin to the opposite surface of the flywheel 50 cover, the cooling effect of the fluid coupling F can be further enhanced. I can do it.

By the way, the hub axle 9 is disposed coaxially with the crankshaft 1 and the main drive shaft 4, and further, the protruding front end of the hub axle 9 is connected to the rear end of the crankshaft 1. It is fitted into the formed recess 1a and rotatably supported via a ball bearing 18 serving as a bearing, so that it can rotate relative to the crankshaft 1.

Here, to further explain how the front end of the hub end 9 fits into the crankshaft 1, an annular bushing 19 is fitted into the recess 1a of the crankshaft 1 by press fitting. The protruding portion of the drive plate 2 is fitted into the central opening 2q of the drive plate 2 with the crankshaft 1 attached thereto.

The hub shaft 9 is rotatably supported by the bush 19 via a ball bearing 18.

Furthermore, an annular boss 21 is press-fitted into the inside of this bushing 19 via an O-ring 20.
The impeller shell 1 is attached to this boss 21 by means such as welding.
are installed in one piece.

Therefore, the boss 21 is provided to protrude from the impeller shell 1.

An oil seal 22 is interposed between the boss 21 and the hub shaft 9.

In this way, the hub shaft 9 of the fluid coupling F,
Since the crankshaft 1 and the fluid coupling F are fitted together, the versatility of fitting the crankshaft 1 and the fluid coupling F increases.

That is, even when one type of fluid coupling F is applied between different engines, the appropriate bushing 19, bearing 18, and even boss 21 are press-fitted into the recess 1a of the engine crankshaft and these are inserted into the same recess 1a. By fitting them together, the crankshaft 1 and the hub axle 9 can be fitted with high accuracy, and by simply replacing the drive plate 2 with the required one, the crankshaft 1 and the impeller in the fluid coupling F can be This is because it can be easily connected to a shelf, which increases versatility between models.

Further, the hub shaft 9 is rotatably supported by a ball bearing 23 serving as a bearing at the enlarged diameter portion rearward from the protruding front end thereof.

The ball bearing 23 has an inner race that contacts the outer periphery of the hub shaft, and an outer race that is fixed to the cover 10 by means such as welding to the circular opening edge of the cover 10.
The inner circumference of the annular supporter 24 is in contact with the inner circumference of the annular supporter 24 as an inwardly projecting end portion of the annular supporter 24 .

Therefore, this ball bearing 23 is interposed between the hub shaft 9 and the supporter 24.

Furthermore, a shim 26 as a position adjustment member is provided between the ball bearing 23 and a screw adapter seal 25 having an inner peripheral surface 25a that is screwed into the inner peripheral thread of the supporter 24 and comes into contact with the hub shaft 9. Since the spacer 21 is interposed, the mounting position of the ball bearing 23 can be appropriately adjusted from the outside after the turbine blade 8 is covered with the cover 10. The thrust clearance of the turbine blade 8 with the hub shaft 9, that is, the clearance that causes play in the axial direction of the knob shaft 9, can be adjusted to an appropriately small value.

The shim 26 for adjusting the position of the ball bearing 23 is in contact with one end wall of the outer seal of the ball bearing 23, and the other end wall of the outer seal faces the mounting arm 9a of the turbine blade 8 of the bubble shaft 9. Between the other end wall of the outer seal and the turbine blade mounting arm 9a of the bubble shaft 9, there is provided a groove so that the bearing function of the ball bearing 23 is not supported.
A gap is formed.

By the way, a mechanical seal part M is interposed between the rear step part of the bubble shaft 9 and the adapter seal 25 attached to the cover 10 via the supporter 24, and this mechanical seal part M has a flange. An annular seal housing 28 is provided.

Inside the seal housing 28, a plate spring 29 and a washer 30 as elastic members are arranged in order from the bubble shaft 9 side.
and a mechanical seal member 31.

As shown in FIGS. 2 and 3, the leaf spring 29 is a washer formed into a corrugated plate shape, and three waves having a period of 120 degrees are formed along the circumference of the washer as a base material. .

Therefore, the front end surface of the leaf spring 29 contacts the inner surface of the flange of the seal housing 28 at three points spaced apart by 120 degrees, and the rear end surface contacts the inner surface of the flange of the seal housing 28 at three points spaced apart from each other by 60 degrees and is spaced apart from each other by 120 degrees. This means that it is in contact with the washer 30 at three points, so that a spring action can be performed.

Since the leaf spring 29 is formed in this way, the action of the leaf spring 290 causes the knob shaft 9 to be moved toward the thrust metal 32.
This can prevent vibration of the bubble shaft 9 in the thrust direction and in the axial direction.

Furthermore, as described above, a space is formed by being surrounded by the knob shaft 9, impeller shell I, cover 10, etc., that is, a space that includes the pump blade rod and turbine blade 9 and is equipped with the oil reserve tanks A and B. , oil as a power transmission medium is accommodated in this space, but an oil seal 22 or Between the O-ring 20 and the adapter seal 25 with the cover 10 and the knob shaft 9, there is the aforementioned mechanical seal member 31 as the mechanical seal part M, the O-ring 33, and the supporter 2 with the cover.
4 and the adapter seal 25 are sealed using an O-ring 34 and a gasket 35, respectively.

Since appropriate seals are applied at various places in this way, sufficient oil sealing can be achieved, and as mentioned above, the thrust of the knob shaft 9 is It is designed to sufficiently prevent directional vibrations.

Further, as mentioned above, the flywheel 5 is directly fastened to the rear end surface of the bubble shaft 9 by bolts 11, which improves the reliability of the connection and reduces the tightening torque. can.

Furthermore, a clutch mechanism C is constituted by this flywheel 5, a clutch facing 36 that can be frictionally engaged with this, a clutch bub 3γ, a pressure plate 38, and the like.
1 is splined onto the main drive shaft 4, and a clutch plate 39 is disposed on one side of the 7 langes in this clutch bub 3γ, and a beam tening plate 40 is disposed on the other side of the 7 langes. It is arranged to face the plate 39.

Furthermore, four notches 37a are formed in the flange of the clutch bub 37 at approximately 90-degree intervals, and each notch 37a is used to connect the clutch tab 39 and retaining plate 40 to a rivet 41. are combined.

Between one notch part 37a and the next notch part 37a, that is, between one rivet joint part and the next rivet joint part, there are seven flange of clutch knob 31, clutch plate 39, and retaining plate 40. Approximately rectangular window holes 42 are bored across the three sides.

In addition, the outermost part of the clutch plate 39 has heat-resistant,
A pair of annular clutch facings 3 with wear resistance
6 and 36 are attached by rivets 43, and by pressing these clutch facings 36 against the flywheel 5 with the bubble shaft 9 via the pressure plate 38 by the biasing force of the diaphragm spring 38',
From the flywheel 5 to the clutch facing 36, clutch plate 39, rivet 41 and clutch bub 3
Power is transmitted to the main drive shaft 4 via the main drive shaft 1.

By the way, the window hole 42 is a window hole for inserting a torsion spring in a conventional solid type clutch.
When the fluid coupling F is installed as in this device, such a torsion spring is not needed, so no torsion spring is loaded into this window hole 42, but this window hole 42 is connected to the flywheel 5. It functions as an opening for introducing cooling air into the gap G3 with the clutch plate 39 to be connected.

In this way, this device interposes the fluid coupling F between the conventional solid type clutch and the crankshaft 1,
It is a highly economical device that allows modification of conventional bundles and reuse of conventional parts.Furthermore, the conventional torsion spring window hole 42 can be used as an opening for introducing cooling air. It is also possible to achieve useful combinations with

Note that the window hole 42 extends over the clutch plate 39, clutch bub 31, and retaining plate 40, so the window hole 42 extends over the clutch plate 39, clutch bub 31, and retaining plate 40.
It includes an opening 42a formed therein.

Further, instead of coupling the clutch plate 39 and the retaining plate 40 with the rivet 41 so as to allow relative movement between the clutch bub 31, the clutch plate 39, and the retaining plate 40, the rivet 41 can be used as described above. 37, 39 and 40 may be combined together.

In FIG. 1, reference numeral 44 indicates a front bearing that supports the main drive shaft 4, 45 indicates a bearing that supports the front end of the main drive shaft 4, 46 indicates a case that covers the device, and 41 indicates a case. The air inlet/outlet formed in 46 is shown.

Since the power transmission device equipped with the fluid coupling mechanism of the present invention is configured as described above, the fluid coupling F
When assembling, first, the bubble shaft 6 having the turbine blades 8 is attached to the pump blade 6 with the impeller shell I so as to overlap the impeller shell 1 so that the turbine blades 8 face each other.

Next, the cover 10 with the supporter 24 is attached to the impeller shell 1 by means such as welding so as to cover the turbine blade 8, and then the ball bearing 23 is attached to the bubble shaft 6.
and the supporter 24, and then the shim 26 and the spacer 2γ are inserted.

At that time, a leaf spring 29, a washer 30, and a mechanical seal member 31 are inserted into the seal housing 28 and then fitted onto the bubble shaft 6.

Note that the mechanical seal member 31 with the washer 30 and the O-ring 33 is inserted into the seal housing 28 through a retaining portion protruding from the inner circumferential wall of the seal housing 28 and a secured portion formed on each member 30, 31. This is done while engaging the recess.

As a result, the seal housing 28 and each member 30, 31
It is designed so that no relative rotation occurs between the two.

After installing the ball bearing 23, shim 26, spacer 21, leaf spring 29, etc. in this way, the O-ring 3
4 and the adapter seal 25 through the gasket 35.
is screwed onto the supporter 24.

Thereby, the ball bearing 23 is moved in the axial direction, and the axial clearance of the bubble shaft 6 can be adjusted to the smallest possible value according to the lengths of the shim 26 and the spacer 21.

Furthermore, at this time, a mechanical seal part M is formed by the seal housing 28, mechanical seal member 31, etc., but at the same time, due to the action of the leaf spring 29, in combination with the above-mentioned gap adjustment, the knob shaft 9 is moved to the thrust metal 32. The bub shaft 9 can be reliably pressed against the impeller shell γ through the bub shaft 9, thereby making it possible to sufficiently prevent vibrations in the axial direction of the bub shaft 9.

Thereafter, the assembled fluid coupling F is interposed between the crankshaft 1 and the clutch mechanism C.

The power transmission device is assembled in this way. When the engine is started and the crankshaft 1 rotates, the drive plate 2 rotates, and the impeller shell γ and cover 10 also rotate, which causes the crankshaft to rotate. 1 is transmitted from a pump blade 6 with an impeller shell I to a turbine blade 8 with a hub shaft 9 via oil.

The torque transmission ratio in this case is set to approximately 1.

When the turbine blades 8 receive power from the crankshaft 1 in this manner, the hub shaft 9 rotates, and the flywheel 5 also rotates.

At this time, if the clutch mechanism C is in the disengaged state, the crankshaft 1
The power from the crankshaft 1 is not transmitted to the main drive shaft 4, and when the clutch mechanism C is in the engaged state, the power from the crankshaft 1 is transmitted to the main drive shaft 4 via the flywheel 5, clutch facing 36, clutch plate 39, and clutch hub 31. The signal is transmitted to the drive shaft 4.

By the way, even if sudden torque fluctuations occur during such torque transmission, the fluid coupling F can sufficiently absorb the fluctuations and can also reduce bending vibrations, thereby improving the stability of the vehicle body. The vibration and noise levels have been significantly lowered, allowing for more comfortable driving.

In this way, the power from the crankshaft 1 is transmitted to the hub shaft 9 and eventually to the main drive shaft 4 via the fluid coupling F, but at this time, the hub shaft 9
is pressed against the impeller shelf via the thrust metal 32 by the action of the leaf spring 29, and the vibration of the hub shaft 9 in the thrust direction is sufficiently prevented.
This makes it possible to sufficiently reduce the vibration and noise level when used in a vehicle or the like.

As the elastic member 29, in addition to using a plate spring obtained by processing a washer into a wave shape, various types of plate springs or various springs can be used.

As detailed above, according to the power transmission device equipped with the fluid coupling mechanism of the present invention, the mounting position of the bearing 23 can be easily adjusted from the outside using the position adjustment members 26 and 27 after the cover 10 is assembled. Therefore, there is an advantage that the thrust clearance of the turbine blade 8 with the hub shaft 9 can be adjusted to an appropriately small value.

Further, according to the power transmission device equipped with the fluid coupling mechanism of the present invention, since the mechanical seal portion M is provided with the elastic member 29 that presses the hub shaft 9 in the axial direction, the axis of the knob shaft 9 is This makes it possible to reliably absorb and remove directional vibrations, making it possible to realize a device suitable for use in vehicles.

[Brief explanation of the drawing]

The figures show a power transmission device equipped with a fluid coupling mechanism as an embodiment of the present invention. FIG. 1 is a longitudinal sectional view thereof, and FIGS. FIG. 2 is a plan view thereof, and FIG. 3 is a front view thereof. 1...Crankshaft, 1a...Crankshaft recess, 2...Drive plate, 2a...
...Air inlet formed in the drive plate 2, 2
a′...Curved edge of air inlet 2a, 2p...
...Ring gear for starter motor, 2q...
・Central opening of drive plate 2, 3...Bolt, 4...Main drive shaft, 5...-
Flywheel as a clutch wheel, 5a...
...Air inlet formed in the flywheel, 6...
... Pump blade, 6a ... Curved inner edge of pump blade 6, γ ... Impeller shell, 8 ... Turbine blade, 9 ... Hub axle, 9a...Turbine mounting arm of hub axle 9,
10...Cover, 11...Bolt, 1
2...Fan frede, 13...Impeller guide, 14...Return hole, 15...
・Turbine blade connecting member, 16... Fan blade, 11... Bolt, 18...
Ball bearing, 19... Bush, 20.
...0 link, 21...boss, 22...
... Oil seal, 23 ... Ball bearing, 24 ... Supporter, 25 ... Adapter seal, 25a ... Inner peripheral surface of adapter seal 25 , 26... Sim, 27...
・Spacer, 28...Seal housing, 29
...Plate blade, 30...Washer, 31
...Mechanical seal member, 32...
Thrust metal, 33, 34...O ring,
35...Gasket, 36...Clutch facing, 31...Clutch hub, 37
a...Notch, 38...Pressure plate, 38'...Diaphragm spring,
39...Clutch plate, 40...
Retaining plate, 41...Rivet, 4
2... Window hole including opening 42a formed in clutch plate 39 itself, 42a... Opening, 4
3...Rivet, 44...Front bearing, 45...Bearing, 46...Case, 4T...Air inlet/outlet, AtB... ...
・Oil reserve tank, C...Clutch mechanism, F...Fluid coupling mechanism, i.e. fluid coupling, G1...Gap between drive plate 2 and impeller shelf, G2... ...Gap between cover 10 and flywheel 5, G3...Gap between flywheel 5 and clutch plate 39, M...
・Mechanical seal part, S... corner part.

Claims (1)

[Claims] 1. A fluid coupling mechanism provided at the end of the crankshaft,
The fluid coupling mechanism includes an impeller shell attached to the crankshaft, a cover integrally formed with the impeller shell and covering the turbine blades, a cover covering the turbine blades, and the turbine blades. a bub shaft disposed coaxially with the shaft; a bearing interposed between the bub shaft and the inward protruding end of the cover; and an inner periphery attached to the cover and in contact with the bub shaft. The fluid coupling mechanism is provided with an adapter seal having a surface, and a position adjustment member is interposed between the bearing and the adapter seal in order to adjust the mounting position of the bearing. Power transmission device. 2 Equipped with a fluid coupling mechanism installed at the end of the crankshaft,
The fluid coupling mechanism includes an impeller shell attached to the crankshaft, a cover integrally formed with the impeller shell and covering the turbine blade, and disposed coaxially with the crankshaft. Bub shaft and
An adapter seal that is attached to the cover and has an inner circumferential surface that comes into contact with the bubble shaft, and a mechanical seal part that is interposed between the adapter seal and the bubble shaft, and the mechanical seal part is attached to the bubble shaft. A power transmission device equipped with a fluid coupling mechanism, characterized in that an elastic member is provided that can press the shaft in the axial direction and absorb vibrations in the axial direction of the bubble shaft.