JPS5856432Y2 - Installation structure of fluid coupling mechanism in power transmission device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for a fluid coupling mechanism in a power transmission device.

Conventionally, many proposals have been made regarding power transmission devices having such fluid coupling mechanisms.

However, in many conventional power transmission devices, the fluid coupling mechanism is configured so that it can be attached only to the crankshaft of a specific engine, and therefore, if the engine mechanism is different, the fluid coupling mechanism attached to it may also be different. Since the fluid coupling mechanism is different, there is a problem that there is no versatility in mounting the fluid coupling mechanism.

The present invention aims to solve these problems by making it possible to attach the same type of fluid coupling mechanism to each engine with a simple structure, even if the engine mechanisms are different. It is an object of the present invention to provide a mounting structure for a fluid coupling mechanism in a power transmission device that provides versatility in mounting the coupling mechanism.

Therefore, the mounting structure of the fluid coupling mechanism in the power transmission device of the present invention includes a drive plate that is provided at the end of the crankshaft and rotates together with the crankshaft, and a fluid coupling mechanism that is attached to the drive plate. , the fluid coupling mechanism includes an impeller shell with pump blades fixed to the drive plate, and a bubble shaft with turbine blades coaxially fitted into a recess in the rear end of the crankshaft. A shaft is fitted into the recess in the crankshaft via a bearing and a bushing that is fitted into the central opening of the drive plate and press-fitted into the recess, and the hub shaft and bushing The present invention is characterized in that a boss is provided between the impeller shell and the boss that projects from the impeller shell and is fitted into the bush.

The mounting structure of a fluid coupling mechanism in a power transmission device as an embodiment of the present invention will be explained below with reference to the drawings. 3, the tightening is fixed, so that the drive plate 2 rotates together with the crankshaft 1.

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

Further, between the drive plate 2 with the crankshaft 1 and the flywheel 5 as a clutch wheel constituting the clutch mechanism C with the main drive shaft 4 of the transmission '4 rule, a fluid coupling mechanism, that is, a fluid A coupling F is interposed.

This fluid coupling F transmits power from the crankshaft 1 to the clutch mechanism C, and this fluid coupling F is connected to an impeller shelf having a pump blade 6, a hub shaft 9 having a turbine blade 8, and an impeller. The turbine blade 8 is formed integrally with the shelf.
It is composed of a cover 10 etc. that covers the.

The mounting structure of each member will be described in detail below.

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

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

Therefore, fan blades 12 are provided between the drive plate 2 and the impeller shelf.

Furthermore, the drive plate 2 has a plurality of air inlets 2.
A is formed, and each air inlet 2a is formed with a curved edge that serves as a fan blade that can guide air to the gap G1 as the drive plate 2 rotates.

Therefore, when the crankshaft 1 rotates and the drive plate 2 rotates, the impeller shelf 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 shelf 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 shelf is provided close to the drive plate 2 to form a narrow gap G1, and a plurality of pump rollers are attached to the inner wall peripheral edge of this impeller shelf, and these pump plates 6
An impeller guide 13 for guiding oil along the curved inner edge 6a of the impeller shelf is attached to the impeller shelf.

As a result, a corner part S that can be filled with oil is formed between the impeller shelf provided close to each other along the drive plate 2 and the curved impeller guide 13. Used as 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.

Incidentally, the cover 10 is formed integrally with the impeller shelf so as to cover the turbine blade 8 with the hub shaft 9. As a result, although this cover 10 also constitutes a part of the casing of the fluid coupling F, the impeller In the space surrounded by the shelf and this 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.

Further, 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 bolts 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, and thereby the fan blade Coupled with the effect of the cooling fins 16, the fluid coupling F can be efficiently cooled.

Note that it is preferable that the gap G2 is also 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 into the gap G2 as the flywheel 5 rotates. The cooling effect of ring 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 surface of the flywheel 5 facing the cover, the cooling effect of the fluid coupling F can be further enhanced. be able to.

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.

Now, to further explain how the front end of the hub shaft 9 fits into the crankshaft 1, an annular bushing 19 is press-fitted into a recess 1a at the rear end of the crankshaft 1. The bush 19 is fitted into the recess 1a, and its protruding portion is fitted into the central opening 2q of the drive plate 2 with the crankshaft 1 attached.

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.
An impeller shelf is integrally attached to this boss 21 by means such as welding.

Therefore, the boss 21 is projected from the impeller shelf.

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 can be fitted, the versatility of fitting the crankshaft 1 and the fluid coupling F is increased.

That is, even when one type of fluid coupling F is applied between different engines, an appropriate bushing 19, bearing 18, and boss 21 are press-fitted into the recess 1a of the engine crankshaft 1, and these are inserted into the 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 connection between the crankshaft 1 and the fluid coupling F can be achieved. This is because it can be easily connected to the impeller 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.

Further, between this ball bearing 23 and an annular adapter seal 25 having an inner circumferential surface 25a that is screwed into the inner circumferential canopy of the supporter 24 and comes into contact with the hub shaft 9, a shim 26 as a position adjustment member is provided. Since the spacer 27 is interposed, the installation position of the pole bear tongue 23 can be adjusted from the outside after the turbine blade 8 is covered with the cover 10. As a result, after the cover 10 is assembled,
From the outside, 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 hub 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 is in contact with the hub shaft 9.
The ball bearing 23 has a bearing function between the other end wall of the outer seal and the turbine blade mounting arm 9a of the bubble shaft 9. A gap is formed to prevent any interference.

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 this seal housing 28, leaf springs 29.0 as elastic members are arranged in order from the side closer to the bubble shaft 9. washer 30
and a mechanical seal member 31.

Therefore, the action of the leaf spring 29 allows the bubble shaft 9 to be pressed against the impeller shelf via the thrust metal 32, thereby preventing vibration of the bubble shaft 9 in the thrust direction.

Further, as mentioned above, a space is formed by being surrounded by the bubble shaft 9, impeller shelf, cover 10, etc., that is, a space in which the pump blades 6 and turbine blades 8 are gold-colored and the oil reserve tanks A and B are provided. An oil seal 22 or an O-ring 20 is provided between the bubble shaft 9 and the boss 21 with an impeller shelf or the bush 19 that fits into the drive plate 2. Between the bubble shaft 9 and the adapter seal 25 with the cover 10 is the mechanical seal member 31 as the mechanical seal part M.
, an O-ring 33, and a supporter 24 with a cover.
A seal is provided between the adapter seal 25 and the adapter seal 25 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 described above, due to the action of the leaf spring 29 installed in the mechanical seal part M, the thrust direction of the bubble shaft 9 is It is designed to sufficiently prevent vibrations.

Further, as described above, the flywheel 5 is directly fastened to the rear end surface of the bubble shaft 9 by bolts 17, which improves the reliability of the connection and reduces the tightening torque.

Further, a clutch mechanism C is constituted by the flywheel 5, a clutch facing 36 and a clutch bub 37 that can be frictionally engaged with the flywheel 5, a pressure plate 38, and the like.
7 is splined onto the main drive shaft 4, and a clutch plate 39 is disposed on one side of the flange of this clutch bub 37, and a beam tening plate 40 is disposed on the other side of this flange. It is placed opposite to.

Furthermore, four notches 37a are formed in the flange of the clutch bub 37 at approximately 90-degree intervals, and each notch 37a allows the clutch plate 39 and retaining plate 40 to meet the point 41. are combined.

The flange of the clutch bub 37, the clutch plate 39, and the retaining plate 40 are located between one notch 37a and the next notch 31a, that is, between one rivet joint and the next rivet joint. A rectangular window hole 42 is 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
6.36 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 7.

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 connecting clutch plate 39 and the gap G3.

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 can be used to modify conventional vehicles and repurpose conventional parts.Furthermore, the conventional torsion spring window hole 42 can be used as an opening for introducing cooling air. It can also be a distant relative of the useful combination of

Note that the window hole 42 extends over the clutch plate 39, clutch bub 37, and retaining plate 40, and therefore the window hole 42 extends over the clutch plate 39, clutch bub 37, and retaining plate 40.
It includes an opening 42a formed therein.

Furthermore, instead of connecting the clutch plate 39 and the retaining plate 40 with the rivets 1 to 41, the rivet 41 is used to allow relative movement between the clutch bub 37, the clutch plate 39, and the retaining plate 40. The above three members 37.39°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 47 indicates a case. The air inlet/outlet formed in 46 is shown.

Since the mounting structure of the fluid coupling mechanism in the power transmission device of the present invention is configured as described above, the fluid coupling mechanism F
In order to attach the ball bearing 18 to the crankshaft 1, the ball bearing 18 is first assembled into the bushing 19, and then the bushing 19 with the ball bearing 1B is fitted into the recess 1a of the crankshaft 1 while being press-fitted.

At this time, the bushing 19 partially protrudes from the crankshaft recess 1a.

Note that the ball bearing 1B may be assembled into the bush 19 after the bush 19 is fitted.

Then, the central opening 2q of the drive plate 2 is fitted into the protrusion of the bush 19, and then the drive plate 2 is fixed to the rear end surface of the crankshaft 1 with bolts 3.

Next, install the pre-assembled fluid cup link below.
It is attached to the crankshaft 1, and an O-ring 20 and an oil seal 22 are assembled by protruding from the front end of the bubble shaft 9 and the impeller shelf into the crankshaft recess 1a into which the bush 19 is fitted. This is performed by fitting the attached bosses 21, respectively, and fixing the impeller shelf with bolts 11 with a gap G1 provided in the drive plate 2.

In the former process, the boss 21 is press-fitted into the bush 19, and the front end of the bubble shaft 9 is fitted so as to be supported by the ball bearing 1B.

Note that the boss 21 may be fitted into the bush 19 in advance, and then the rear end portion of the boss 21 may be fixed to the impeller shelf by means such as welding.

In the latter step, the peripheral edge of the drive plate 2 and the peripheral edge of the outer wall of the impeller shelf are tightened and fixed with a plurality of bolts 11.

In this case, since torque is transmitted through this bolted joint, the tightening and fixing can be performed reliably.

Thereafter, the front end surface of the flywheel 5 of the clutch mechanism C and the rear end surface of the bubble shaft 9 are connected with bolts 17, thereby connecting the crankshaft 1 and the clutch mechanism C.
This means that the fluid coupling F is installed between.

According to such an attachment means, it becomes possible to attach the same type of fluid coupling F to various engines.

In other words, even if the engine model is different, the crankshaft 1 and the bubble shaft 9 can be fitted with high precision by simply replacing the low-cost bushing 19, bearing 1B, and even boss 21 accordingly. Moreover, the crankshaft 1 and the impeller shelf can be easily connected by simply replacing drive plates 2 with different sizes of central openings 2q, etc., thereby increasing versatility between models.

After the fluid coupling F is installed in this way, torque transmission begins when the crankshaft 1 rotates.
When the drive plate 2 rotates, the impeller shelf and the cover 10 also rotate, whereby the power from the crankshaft 1 is transferred to the pump blade 6 with the impeller shelf.
From the turbine blade 8 with the bubble shaft 9 through the oil
transmitted to.

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

When the turbine blade 8 receives power from the crankshaft 1 in this manner, the bubble shaft 9 rotates, and the flywheel 5 also rotates.

At this time, if the clutch mechanism G is in the disconnected state, the clutch shaft 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 37. 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.

Note that instead of using the ball bearing 18 as the bearing interposed between the crankshaft recess 1a and the hub shaft 9 as in the above-described embodiment, a suitable bearing such as a thrust bearing may be used.

As described in detail above, according to the mounting structure of the fluid coupling mechanism in the power transmission device of the present invention, the drive plate 2, which is provided at the end of the crankshaft 1 and rotates integrally with the crankshaft 1, and the drive plate 2, The fluid coupling mechanism F is provided with an impeller shelf with a pump blade 6 fixed to the drive plate 2, and a recess 1a in the rear end of the crankshaft 1. A hub shaft 9 with turbine blades 8 is fitted coaxially with the hub shaft 9, and the hub shaft 9 is fitted with a bearing 18 and a bushing which is fitted into the central opening 2q of the drive plate 2 and press-fitted into the recess 1a. a boss 21 that is fitted into the recess 1a in the crankshaft 1 through the hub shaft 19 and protruded from the impeller shelf between the hub shaft 9 and the bushing 19, and that is fitted into the bush 19; , it is possible to provide versatility in installing the fluid coupling mechanism F, and this allows the fluid coupling mechanism F to be easily installed on various vehicles with different engine models, reducing manufacturing costs. There is an advantage in that it can be significantly reduced.

[Brief explanation of drawings]

The figure is a longitudinal sectional view showing a mounting structure of a fluid coupling mechanism in a power transmission device as an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Crankshaft, 1a... Recess formed in the rear end of the crankshaft 1, 2... Drive plate, 2a...
...Air inlet formed in drive plate 2, 2p
...Ring gear for starter motor, 2q...Central opening of drive plate 2, 3...Bolt, 4...Main drive shaft, 5...Flywheel as clutch wheel, 5a...Flywheel 6... Pump blade, 6a... Curved inner edge of pump blade 6, 7... Impeller shell, 8... Turbine blade, 9... Huff axis, 9a・
...Turbine blade mounting arm of hub axle 9, 10...
Cover, 11... Bolt, 12... Fan blade, 13... Impeller guide, 14... Return hole, 15
... Turbine blade connecting member, 16... Fan blade, 17... Bolt, 18... Ball bearing as a bearing, 19... Bush, 20... O-ring, 21... Boss, 22...Oil seal, 23
. . . Ball bearing as a bearing, 24 . . Supporter as an inwardly projecting end of the cover 10, 25 .
inner peripheral surface, 26... shim as a position adjustment member, 27
. . . Spacer as a position adjustment member, 28 . . . Seal housing, 29 . . . Leaf spring as an elastic member, 3
0...Washer, 431...Mechanical seal, 33, 34...O ring, 35...Gasket, 36...Clutch facing, 37...Clutch hub, 37 a...Notch , 38...Pressure plate, 38'...Diaphragm spring, 3
9... Clutch plate, 40... Retaining plate, 41... Rivet, 42... Window hole including opening 42a formed in clutch plate 39 itself, 4
2 a...Opening, 43...Rivet, 44...Front bearing, 45...Bearing, 46...Case, 47...Air inlet/outlet, A, B...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 (2)

[Scope of utility model registration request] (1) A drive plate is provided at the end of the crankshaft and rotates together with the crankshaft, and a fluid coupling mechanism is attached to the drive plate, and the fluid coupling mechanism is fixed to the drive plate. The impeller shell includes an impeller shell with a pump blade, and a bubble shaft with a turbine blade that fits coaxially with the recess in the rear end of the crankshaft, and the bubble shaft fits into the bearing and the central opening of the drive plate. and a bushing that is press-fitted into the recess while being fitted into the recess in the crankshaft, and protruding from the impeller shell between the bub shaft and the bushing to fit into the bushing. A mounting structure for a fluid coupling mechanism in a power transmission device, characterized in that a boss to be fitted is provided. (2) A mounting structure for a fluid coupling mechanism in a power transmission device according to claim 1, wherein a starting ring gear is integrally provided on the peripheral edge of the drive plate.