KR20050022286A - Oil supplying device in centrifugal type clutch of internal combustion engine - Google Patents

Abstract

PURPOSE: An oil feed device for a centrifugal clutch of an internal combustion engine is provided to effectively lubricate the clutch by inducing the lubricating oil through a lubricating oil exhaust port to a lubricating oil through-hole opened at an inner plate of the clutch and changing simply the structure of a bearing or the clutch. CONSTITUTION: An oil feed device for a centrifugal clutch(3) of an internal combustion engine has a torque converter(8) and the centrifugal clutch, which are installed at a crank shaft(1) and supplies actuating fluid through a passage(1b) formed in the crank shaft to the torque converter. The oil feed device is composed of an actuating fluid supply passage(21c) installed in a clutch cover short wall(21) covering the clutch and connected with the passage of the crank shaft and a lubricating oil exhaust port(21e) opened in the actuating fluid supply passage. Some of the actuating fluid, which is induced to the passage of the crank shaft through the actuating fluid supply passage, is jetted from the exhaust port and inserted into the clutch through a lubricating oil through-hole(31h).

Description

Oil supply device in centrifugal clutch of internal combustion engine {OIL SUPPLYING DEVICE IN CENTRIFUGAL TYPE CLUTCH OF INTERNAL COMBUSTION ENGINE}

The present invention relates to a lubrication device in a centrifugal clutch of an internal combustion engine, and more particularly to an improvement technique of a lubrication structure for lubrication in a centrifugal clutch installed in parallel with a torque converter on a crankshaft.

Conventionally, as a lubrication device for lubrication in a centrifugal clutch of an internal combustion engine, a lubricating oil supply flow path is formed on an end wall of a cover which is a part of a mission case constituting the cover structure of the clutch, and lubricating oil is ejected into the clutch from the lubricating oil jet opening provided in the flow path. In this way, a lubrication device for a clutch that lubricates the clutch is known (see Patent Document 1, for example). In addition, in a vehicle wet multi-plate clutch, a lubricating oil passage is provided in a lifter rod inserted into the clutch. A clutch lubrication device is known which supplies lubricating oil to the clutch through this passage to achieve lubrication and cooling (see Patent Document 2, for example).

(Patent Document 1) Japanese Unexamined Patent Application Publication No. 2002-48150 (Page 2 to Page 3, Figure 1)

(Patent Document 2) Japanese Unexamined Patent Publication No. 2-32897 (Page 3, FIG. 2)

As shown in FIG. 4, the oil supply apparatus of the clutch described in the patent document 1 is equipped with a centrifugal clutch 03 on the crankshaft 01, and the clutch 03 is clutched from the outside thereof. Covered by the cover 021, the clutch cover 021 is configured as a cover member that forms part of the mission case 02, and a supply flow passage 021d in the end wall 021a of the cover 021 for lubricating oil supply. ) Is formed.

A jet port 021f for ejecting the lubricant oil is opened in the middle of the lubricant oil supply passage 021d in the end wall 021a of the clutch cover 021, and the lubricant oil ejected from the opening 021f is the The lubrication in the clutch 03 is introduced into the clutch 03 from the gap between the inner circumference of the support plate 031 and the outer circumference of the crankshaft 01, which is one member for holding and holding the measurement weight 05. Is fulfilling.

Moreover, the oil supply apparatus in the clutch of the said patent document 2 is a lifter which contacts the release lever 03a which performs the single engagement of the clutch 03 by the lubrication of the wet multi-plate clutch 03, as shown in FIG. A flow path 03c is formed inside the rod 03b, and lubricating oil is supplied into the clutch 03 through the flow path 03c to achieve lubrication and cooling in the clutch 03.

By the way, in the oil supply apparatus of the centrifugal clutch described in the said patent document 1, the supply plate of the support plate which hold | maintains the clutch weight (weight member) of the clutch rather than clutch inner plate (ring plate of clutch inner) is not supplied. The gap between the inner circumference and the crankshaft outer circumference is used, and this lubricating oil supply method can be directly employed when the lubricating oil is supplied from the structural side where the side of the clutch is completely covered by the clutch inner plate. In addition, since the supply of this lubricating oil at a position close to the crankshaft is made at a position away from the contact portion of the clutch shoe member on the outer circumferential side of the centrifugal clutch (weight member) and the clutch outer, the contact portion Supply of accurate and reliable lubricant is not achieved There are concerns lubrication is not achieved.

Moreover, in the oil supply apparatus in the clutch of the said patent document 2, supply of lubricating oil is made through the flow path formed in the inside of a lifter rod, and such supply of lubricating oil sucks air by generation | occurrence | production of the negative pressure in the said flow path. As a result, so-called aeration may occur, and oil supply for reliable lubrication may be hindered. The generation of aeration in the flow path due to the air suction is a part of the hydraulic oil in the oil supply system of the present invention, that is, the supply of the hydraulic oil to the torque converter by the flow path in the shaft such as the crankshaft. This is also a common problem in the oil supply system supplied as lubricating oil such as a clutch through the branch flow path of the flow path.

From the foregoing, in the vigo where development of an optimum oil supply device in the clutch is desired, especially in a centrifugal clutch which is installed in parallel with the torque converter on the crankshaft, the hydraulic oil to the torque converter passes through the flow path in the crankshaft. It is premised on the lubrication system supplied, and a part of the hydraulic fluid used as lubricating oil of the centrifugal clutch, and there is no occurrence of the above-mentioned aeration, and the effective lubrication in the centrifugal clutch is achieved by simple structure change. It is desirable to provide an improvement technique for the oil supply device in the centrifugal clutch.

The present invention is an improvement of a lubrication device for lubrication in a centrifugal clutch provided to solve the above problems, by providing a torque converter and a centrifugal clutch on a crankshaft, and supplying hydraulic oil to the torque converter. In the lubrication device of the centrifugal clutch of the internal combustion engine made through the flow path in the shaft, a supply flow path of the hydraulic oil connected to the flow path in the crankshaft is provided on the end wall of the clutch cover covering the centrifugal clutch. A flow opening of lubricating oil is opened in the flow passage, and a part of the hydraulic oil flowing in the working oil supply flow passage and delivered to the flow passage in the crankshaft is ejected from the blowing opening and passes through a hole for lubricating oil passing provided in the inner plate of the clutch. Is introduced into the clutch, and the clutch is lubricated. It is characterized by.

In the oil supply apparatus of the centrifugal clutch of an internal combustion engine in which a torque converter and a centrifugal clutch are provided on the crankshaft and supply of hydraulic oil to the torque converter is made through a flow path in the crankshaft, the centrifugal clutch is provided. A supply flow path of the hydraulic oil connected to the flow path in the crankshaft is provided on the end wall of the clutch cover to be covered, and a portion of the hydraulic oil guided from the hydraulic oil supply flow path to the flow path in the crankshaft is supported by the clutch cover end wall. It flows out from the clearance of a bearing part, is passed through the hole part for lubricating oil passing provided in the inner plate of the said clutch, and introduce | transduced into this clutch, It is characterized by making the said clutch lubricate.

(Example 1)

EMBODIMENT OF THE INVENTION Example 1 of this invention is demonstrated based on FIG.

The crankshaft 1 of the internal combustion engine shown in FIG. 1 is rotatably supported by the crankcase through a bearing part, and only one bearing part A is shown in FIG. The rotatable support of the crankshaft 1 in the bearing part A is made through the ball bearing 11, and the inner race part 11a of this bearing 11 is the one shaft of the crankshaft 1; The bearing engaging hole formed in the end wall 21 of the clutch cover (mission case cover) 2 which is fitted and fixed to the end portion 1a and whose outer race portion 11b substantially forms part of the mission case ( It is made by being fitted and fixed in 21a).

The crankshaft 1 is provided with the centrifugal clutch 3 in the position near the end bearing part A, The base plate 31a of this inner part 31 of this clutch 3 is this base part. (31a) It is mounted so that relative rotation is not possible with respect to this axis | shaft 1 via the spline 31b provided in the inner peripheral part, and this base part 31a has predetermined axial length for engagement of the said spline 31b. It is formed as the boss part 31c which has. And the central recess plate part 31d which extends obliquely from the radial direction from the outer peripheral part of this boss | hub part 31c and forms an annular recessed part is formed.

The outer circumference 31e of the center concave plate portion 31d is connected to an annular flat plate portion 31f which is oriented in the vertical direction and extends in the radial direction, and in the vicinity of the outer circumference portion 31g of the flat plate portion 31f. As shown in Figs. 1 and 2 at the circumferentially equidistant positions at the positions, a plurality of pin members 4 (3 pieces) are provided, and the weight member 5 has one end thereof at the pin members 4. The part 5a is rotatably supported and attached. The weight member 5 is usually composed of a plurality of plate-like members 5b superimposed on each other, and the outer peripheral portion 5c has a structure in which a shoe member 5d is mounted, and each weight member 5 is adjacent to the weight member 5. They are connected to each other by spring members 6.

On the other hand, the outer plate 32 of the clutch 3 has a plate portion 32a extending in the radial direction so as to face the inner plate 31, and the outer circumferential portion 32b of the plate portion 32a is the weight. It extends toward an axial direction so that the outer peripheral part 5c of the member 5 may be covered, and it becomes the outer peripheral part annular extension part 32c, and the base part 32d of the outer plate 32 is the ball bearing 12 It is supported by the crankshaft 1 through, and it has the bearing engagement hole 32e which fits the outer race part 12b of the ball bearing 12 for this.

And the outer race part 12b is fitted to the said bearing engagement hole 32e, and the outer plate 32 of the clutch 3 is rotatably supported with respect to the crankshaft 1. Moreover, the said base part 32d is provided with the annular extension part 32f extended axially to the inner plate 31 toward the inner plate 31, and the inner peripheral surface (32f) of this annular extension part 32f is provided. A one-way clutch 7 is attached between 32f1) and the outer circumferential portion of the boss portion 31c of the base portion 31a of the inner plate 31.

In the centrifugal clutch 3 having the above-described structure, the rotation of the inner plate 31 accompanying the rotation of the crankshaft 1 reaches a predetermined rotation, as is well known, so that the outer circumferential portion of the inner plate 31 31g) Each weight member 5 mounted in the vicinity rotates so as to protrude outward with the pin member 4 as a supporting point against the spring force of the spring 6, and each weight member 5 outer peripheral portion 5c. The shoe member 5d of) is pressed against the inner circumferential surface 32c1 of the outer circumferential annular extension portion 32c of the outer plate 32 (see Fig. 2). Thereby, the inner plate 31 and the outer plate 32 of the clutch 3 are integrated, and this clutch 3 rotates with the rotation of the same speed as the crankshaft 1.

In the crankshaft 1, the torque converter 8 is arrange | positioned without having a direct fixed relationship with this crankshaft 1, and this torque converter 8 is the outer plate 32 side of the centrifugal clutch 3 side. Adjacent to and further integrally fixed to one of the pump portion 8a of the torque converter 8 to the base plate 32d of the outer plate 32 of the centrifugal clutch 3, and the pump portion 8a is It is made to rotate together with the outer plate 32, and the other turbine part 8b of the torque converter 8 is fixed to the gear part of the transmission part 9 which is not clearly shown, It rotates with the said turbine part 8b, and the vehicle runs in the desired speed change state by predetermined | prescribed shift control in this transmission part 9.

In the torque converter 8, the hydraulic oil in the pump impeller is accelerated by the centrifugal force by the rotation of the pump portion 8a through the outer plate 32 by joining the centrifugal clutch 3, and the flow of the hydraulic oil It contacts the blade of the turbine runner of the turbine part 8b, flows along this blade after rotating this runner by the impact force, and rotates a turbine runner by the reaction force when it flows out of a turbine runner.

The hydraulic oil flowing out of the turbine runner still has considerable residual energy, and the energy is conveyed by the stator 8c in the direction of contact with the back of the pump impeller again to assist the rotation of the pump impeller to increase the torque. . In other words, the hydraulic oil exiting the stator 8c returns to the pump impeller to form a circulation circuit, but in that circuit, the torque for rotating the pump impeller and the torque for rotating the stator 8c act in the same direction. Therefore, the torque of the turbine runner is increased by the torque applied to the stator 8c. The operation of such a torque converter 8 is well known.

The centrifugal clutch 3 and the torque converter 8 mounted and mounted near one end of the crankshaft 1 generally have the same structure as described above, and they are covered by the clutch cover 2 which is the mission case cover. .

By the way, in the axis | shaft of the crankshaft 1, the flow path 1b extended from the said shaft end part 1a which is said one end in the longitudinal direction of this shaft 1 is formed, and this flow path 1b is a crankshaft. Although the shaft center part of (1) is extended in the longitudinal direction as mentioned above, it does not penetrate in this longitudinal direction, but it is directed to the torque converter 8 near the deepest part of this flow path 1b, ie, this flow path ( Two branch flow paths 1c are formed which are orthogonal to each other from 1b) and extend in opposite directions to open in the fluid chamber of the torque converter 8, respectively. The opening 1d for oil supply to the flow paths 1b and 1c in the shaft is opened at the shaft end portion 1a of the crank shaft 1.

The opening 1d of the flow path 1b at the shaft end portion 1a of the crankshaft 1 engages the above-described ball bearing 11 at the end wall 21 of the clutch cover 2 which is a mission case cover. The oil reservoir 21b has a diameter slightly smaller than this hole formed by being connected to the coupling hole 21a for the purpose. The oil reservoir 21b is formed by the end wall of the clutch cover 2. It is connected to the working oil supply flow path 21c formed so as to penetrate the inside of 21.

An inner wall surface portion of the clutch cover end wall 21 from this flow passage 21c is connected to the hydraulic oil supply flow passage 21c which is connected to and communicates with the oil reservoir 21b formed to penetrate the inside of the end wall 21 of the clutch cover 2. 21 d) is reached, and the injection port 21e which injects the oil for lubrication which is a part of the hydraulic oil opened by this inner wall surface part 21d is formed, and this lubricating oil injection port 21e supplies the hydraulic oil inside the said end wall 21. It consists of the passage part of the small diameter opening 21f in the flow path 21c, and the passage part of the large diameter opening 21g in the clutch cover inner wall surface part 21d, and the passage part of the large diameter of this cover inner wall surface part 21d. The opening 21g opposes the flat plate portion 31f extending in the radial direction of the clutch inner plate 21 described above.

On the opposite surface of the clutch inner plate 31 facing the large diameter passage opening 21g of the lubricating oil injection port 21e, that is, the flat plate portion 31f extending in the radial direction of the inner plate 31. A lubricating oil passage hole 31h having an opening of a considerably larger diameter is formed in comparison with the passage portion opening 21g, and the lubricating oil passage hole 31h has a weight member 5 inside the inner plate 31. It is opened at a position adjacent to the gap 33 between the inner plate 31.

As explained later by the lubricating oil passage hole 31h having the opening of the large diameter, the lubricating oil ejected from the lubricating oil injection port 21e is accurately and reliably captured. (31h) does not necessarily need to be one place. The opening of the lubricating oil passage hole 31h is also a hole used for tightening and fixing the crank center nut N in the mounting of the clutch 3 to the crank shaft 1.

The supply structure of the hydraulic oil to the torque converter 8 and the supply structure of the lubricating oil for lubrication to the centrifugal clutch 3 in the first embodiment are the same as described above, and the supply action of the hydraulic oil to the torque converter 8 The supply action of the lubricating oil to the centrifugal clutch 3 is demonstrated briefly.

Torque converter 8 supplied to the hydraulic oil supply passage 21c penetrating the inside of the end wall 21 of the clutch cover 2, which is a mission case cover, through an oil pan, an oil pump, an oil filter, and an oil gallery, not shown. The operating oil in the furnace is supplied from the supply flow passage 21c to the oil storage portion 21b and passes through the flow passage 1b for supplying the hydraulic oil extending to the center of the longitudinal axis of the crankshaft 1, and the branch flow passage 1c. ) Is introduced into the torque converter 8.

The hydraulic oil delivered into the pump chamber of the torque converter 8 overlaps with some of the above descriptions, but at the time of the connecting operation of the centrifugal clutch 3 described later, the turbine portion 8b from the pump portion 8a of the torque converter 8. ), The turbine runner is rotated by the torque caused by the flow action of the hydraulic fluid. The rotation of the turbine runner is transmitted to the gear portion of the transmission portion 9, which is not clearly shown, and the vehicle is driven at the desired speed through the speed change control at the transmission 9 through the gear portion. do.

On the other hand, the lubricating oil for lubrication to the centrifugal clutch 3 is a branch of the hydraulic oil supply passage 21c that penetrates the inside of the end wall 21 of the clutch cover 2 in the supply of the hydraulic oil to the torque converter 8. The lubricating oil ejected from the lubricating oil jet port 21e serving as the flow path under a predetermined pressure is discharged from the jet port 21e toward the radial direction of the inner plate 31 of the centrifugal clutch 3 facing the jet port 21e. It is led in the lubricating oil through hole 31h opening in the flat plate part 31f which extends. And since the opening position of this hole 31h is a position adjacent to the clearance gap 33 between the weight member 5 and the inner plate 31 inside, the contact part whole of the clutch shoe member 5d (refer FIG. 2) is full. Lubricant oil is widely spread in the air, and effective lubrication of this part is achieved.

(Example 2)

The second embodiment differs from the first embodiment in the structure for supplying the lubricating oil to the centrifugal clutch 3, but is not particularly different in the other structural parts. This Example 2 is demonstrated based on FIG. In addition, the same code | symbol is used about the structural member substantially the same as the structural member in Example 1. FIG.

As shown in FIG. 3, in the end wall 21 of the clutch cover 2 which is the mission case cover, the bearing engagement hole 21a in which the shaft end portion 1a of the crankshaft 1 is supported through the ball bearing 11. Is provided, and the oil storage part 21b which is a hole slightly smaller than this hole 21a is connected and connected to this bearing engagement hole 21a, and this oil storage part 21b is the said clutch cover end wall 21. It is connected to the hydraulic oil supply passage 21c penetrating the inside of the tube.

The bearing support by the ball bearing 11 of the shaft end portion 1a of the crankshaft 1 is fixed to the inner race portion 11a of the bearing 11 by being fitted to the crankshaft 1. Although the race part 11b is made by being fitted and fixed to the bearing engagement hole 21a of the clutch cover end wall 21, in this Example 2, engagement of the crankshaft 1 and the bearing inner race part 11a is carried out. The clearance A1 is provided between both of them, and a part of the hydraulic oil pumped from the hydraulic oil supply passage 21c flows through the clearance A1 as oil for lubrication of the clutch.

On the other hand, in the inner plate 31 of the centrifugal clutch 3, a lubricating oil passage hole 31h is opened in the ring-shaped center concave plate portion 31d forming surface 31d connected to the base portion 31a. The position where the lubricating oil passage hole 31h is opened is substantially equal to the clearance A1 between the inner circumference of the inner race portion 11a of the ball bearing 11 and the engaging portion of the crank shaft 1 outer circumference. It is the optimum position at which the oil for lubrication flowing through it can be captured accurately and reliably, and also in the gap 33 between the weight member 5 in the clutch 3 and the inner side of the inner plate 31. Adjacent location. In addition, this lubricating oil passage hole 31h does not necessarily need to be one place, and may be formed in many places suitably.

The surplus of the hydraulic oil of the torque converter 8 pumped from the hydraulic oil supply passage 21c inside the clutch cover end wall 21 to the oil storage portion 21b by the above-described structure is such that the ball bearing 11 It flows out to the inner plate 31 side of the centrifugal clutch 3 through clearance A1 in the engaging part of the inner race part 11a inner periphery and the outer periphery of the crankshaft 1. The outflowed oil is effectively introduced into the lubricating oil through hole 31h opening to the inclined forming surface 31d1 of the central concave plate portion 31d of the inner plate 1, and the Since the opening position is a position adjacent to the gap 33 between the weight member 5 and the inner plate 31 inner side, the front surface lubrication of the clutch shoe member 5d (see FIG. 2) becomes possible, which is effective in the centrifugal clutch. Lubrication is done.

According to the first aspect of the present invention, the lubricant oil ejected from the lubricating oil jet opening that is opened in the middle of the hydraulic oil supply flow path to the torque converter 설치된 provided on the clutch cover end wall is led to the lubricating oil passage hole opened to the inner plate of the clutch, Since the clutch is lubricated by the lubricating oil introduced through the part, a simple structural change is made to the flow path of the clutch cover end wall and a part of the clutch, thereby ensuring a reliable supply of the lubricating oil to the centrifugal clutch, thereby effectively Lubrication is achieved.

According to the second aspect of the present invention, the lubricant oil flowing out from the hydraulic oil supply passage to the torque converter provided on the clutch cover end wall through the gap in the bearing portion of the crankshaft is delivered to the lubricating oil passage hole opened in the inner plate of the clutch. Since the clutch is lubricated by the lubricating oil introduced through the hole, a simple structural change is made to the bearing portion or a part of the clutch to ensure reliable supply of the lubricating oil and to achieve effective lubrication in the clutch.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the main structure part in the clutch oil supply apparatus of this invention (Example 1).

Figure 2 is a side view of the centrifugal clutch of the present invention, a portion of which is shown in cross section.

Fig. 3 is a diagram showing the main structure part in another embodiment of the clutch oil supply device of the present invention (Embodiment 2).

It is a figure which shows the main structure part of the clutch oil supply apparatus in the conventional invention.

It is a figure which shows the main structure part of the clutch oil supply apparatus in another conventional invention.

<Description of the symbols for the main parts of the drawings>

1: crankshaft 1a: shaft end of crankshaft

1b: Euro 1c: Quarterly Euro

1d: opening part A: bearing part

A1: clearance 11, 12: ball bearing

11a: inner race portion 11b, 12b: outer race portion

2: clutch cover 21: clutch cover end wall

21a: bearing engagement hole 21b: oil reservoir

21c: hydraulic oil supply flow path 21d: inner wall surface of the cover end wall

21e: lube oil outlet 21f, 21g: opening

3: centrifugal clutch 31: clutch inner plate

31a: base portion 31b: spline

31c: boss portion 31d: center recess plate portion

31e: outer periphery 31f: flat plate portion

31g: inner plate outer peripheral portion 31h: lubricating oil through hole

32: clutch outer plate 32a: radially extending plate portion

32b: outer circumference 32c: outer circumference

32c1: inner circumference 32d: base part

32e: engagement hole 32f: annular extension

32f1: inner circumference 33: gap

4 pin member 5 weight member

5a: first 5b: plate-shaped

5c: Weight member outer circumference 5d: Shoe member

6: spring member 7: one-way clutch

8: torque converter 8a: pump portion

8b: turbine portion 8c: stator portion

9: transmission portion N: crank center nut

Claims (2)

A fuel supply apparatus in a centrifugal clutch of an internal combustion engine, in which a torque converter and a centrifugal clutch are provided on a crankshaft and supply of hydraulic oil to the torque converter is made through a flow path in the crankshaft. A supply flow path for operating oil is connected to the flow path in the crankshaft and is provided on the end wall of the clutch cover covering the centrifugal clutch, and an ejection port of lubricating oil is opened in the hydraulic oil supply flow path, and flows into the hydraulic oil supply flow path to flow through the crankshaft. A part of the hydraulic oil guided to the said flow path in the inside is blown out from the said injection port, and it introduces into this clutch through the hole part for lubricating oil passing provided in the inner plate of the said clutch, and makes it lubricate the said clutch, It characterized by the above-mentioned. Lubrication device in the centrifugal clutch of the engine. A fuel supply apparatus in a centrifugal clutch of an internal combustion engine, in which a torque converter and a centrifugal clutch are provided on a crankshaft and supply of hydraulic oil to the torque converter is made through a flow path in the crankshaft. A supply flow path of the hydraulic oil connected to and communicated with the flow path in the crankshaft is provided on the end wall of the clutch cover covering the centrifugal clutch, and a part of the hydraulic oil guided from the hydraulic fluid supply flow path to the flow path in the crankshaft is the clutch cover short wall. A centrifugal clutch of the internal combustion engine, which flows out of the clearance of the bearing portion of the crankshaft supported by the shaft, is introduced into the clutch through the hole for lubricating oil passing provided in the inner plate of the clutch, and lubricates the clutch. Refueling device in