JP2008202656A - Oil recovering apparatus of oil clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil recovering apparatus of an oil clutch having a simple structure, capable of increasing an oil inlet height of an oil tank without enlarging a clutch case. <P>SOLUTION: The oil recovering apparatus 1 of an oil clutch scrapes up oil 8 stored at the bottom of a clutch case 2 by means of a flywheel 12 of an engine, a clutch and a clutch cover 15 provided on the flywheel 12, and discharges the oil 8 from the clutch case 2 to the oil tank 6, thereby recovering the oil. The clutch case 2 includes a housing 3 having the bottom and a tabular upper cover 4 detachably attached to an upper side of the housing 3. A through hole 4a is formed in the upper cover 4. A communication passage 5 communicating with the through hole 4a is disposed above the upper cover 4. The oil 8 is scraped up to the communication passage 5 so as to be discharged to the oil tank 6 through the communication passage 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an oil recovery device for an oil clutch. In particular, the present invention relates to an apparatus for collecting oil collected at the bottom of a clutch case into an oil tank in an oil clutch of an industrial vehicle such as a forklift or a truck.

Conventionally, for example, devices disclosed in Patent Documents 1 and 2 are known as oil recovery devices for oil clutches. These oil recovery devices use the engine flywheel, the clutch attached to the flywheel, and the clutch cover to scoop up the oil accumulated at the bottom of the clutch case, and then remove the oil from the oil outlet formed on the side of the clutch case. Discharge. And it is the structure which flows and drops oil to an oil tank via the connecting pipe connected to the oil outlet. Therefore, oil is flowed from the oil outlet of the clutch case to the oil tank using a drop.
Japanese Patent Laid-Open No. 9-25945 JP-A-8-93792

  However, in order to increase the capacity of the oil tank, it may be necessary to enlarge the oil tank vertically or increase the position of the oil tank due to the arrangement of other parts. If the oil outlet is higher than the oil outlet formed on the side surface, the oil recovery device cannot be used. As a countermeasure, a method of enlarging the clutch case in the vertical direction is conceivable, but it is not easy to enlarge the clutch case due to the layout of piping or the like. Moreover, when the capacity of the gap in the clutch case is increased, there is a problem that the oil lifting force is reduced. Conventionally, a device for pumping up and collecting oil by other power such as a pump and a venturi pipe is also known. However, this apparatus has a problem that the number of parts increases and the cost increases.

  Accordingly, an object of the present invention is to provide an oil recovery device for an oil clutch that can increase the oil inlet height of an oil tank without increasing the size of the clutch case and with a simple structure.

  In order to solve the above-mentioned problems, the present invention is an oil recovery device for an oil clutch having the configuration described in each claim. That is, according to the first aspect of the present invention, the clutch case has a housing having a bottom portion and a flat top lid that is detachably attached to the upper side of the housing, and a through hole is formed in the upper lid. A communicating path that communicates is provided on the upper side of the upper lid. And it is the structure which pumps up oil to a communicating path, and discharges oil to the oil tank side through a communicating path.

  Accordingly, the oil is lifted upward from the upper lid of the clutch case by the clutch cover or the like. Thereafter, the oil is discharged to the oil tank side through a communication path provided on the upper side of the upper lid. Therefore, the oil inlet height of the oil tank can be made higher than the height of the clutch case, for example. Therefore, the oil inlet height of the oil tank can be increased without enlarging the clutch case. In addition, the number of parts can be reduced compared to an oil recovery device having a pump or the like, and the structure is simple. Since the upper lid is flat, it can be easily attached in a sealed state to the housing, and since the communication path is provided on the upper side of the upper lid, it can be removed together with the upper lid or separately from the housing, thereby improving maintenance. Are better.

  According to the second aspect of the present invention, the through hole formed in the upper lid is formed closer to the lifting side than the rotation center of the clutch cover. Therefore, after the oil is swept up by a clutch cover or the like, the oil does not flow past the rotation center through the lower side of the upper cover as in the prior art, and is discharged to the upper lid through a through hole at a position in front of the rotation center. . Therefore, the oil can be lifted to the upper side of the upper lid by efficiently using the lifting force.

  According to the third aspect of the present invention, the communication passage includes a first passage extending obliquely upward from the through hole and in the rotational tangential direction of the clutch cover, and continuously extending from the first passage and on the oil tank side. And a second passage having a bottom surface that is inclined obliquely downward. Accordingly, the oil is lifted upward from the upper lid along the first passage by effectively utilizing the lifting force of the clutch cover or the like. And after that, oil is urged | biased to the oil tank side using the inclination of the bottom face of a 2nd channel | path.

  According to invention of Claim 4, the diameter of the 1st channel | path becomes small, so that it leaves | separates from a through hole. The diameter of the second passage increases as the distance from the first passage increases. Therefore, after the hydraulic pressure of the oil is increased by the first passage, the hydraulic pressure is released by the second passage. Therefore, the oil lifting force can be converted into the oil discharge force from the communication passage side to the oil tank side by the first passage and the second passage. Therefore, oil can flow smoothly to the oil tank side.

  According to the fifth aspect of the present invention, the guide that extends downward from the through hole of the upper lid and guides the oil to the through hole is formed integrally with the communication path. Therefore, the oil is guided to the through hole by the guide, and after passing through the through hole, the oil is guided by the communication path. In addition, since the guide and the communication path are integrally formed, they have a simple structure with little fear of liquid leakage.

  One embodiment of the present invention will be described with reference to FIGS. The oil recovery device 1 is a device that stores the oil 8 sprayed on the clutch disk 13 side in order to cool the clutch disk 13 and rakes up and collects the stored oil 8. As shown in FIGS. 1 and 2, the oil recovery apparatus 1 has a clutch case 2. The interior of the clutch case 2 houses a flywheel 12 fixed to the end of the crankshaft 11 of the engine and a clutch cover 15 attached to the flywheel 12. In a space formed by the flywheel 12 and the clutch cover 15, a clutch disk 13 and a pressure plate 14 are accommodated. The clutch disk 13 is spline-fitted to the input shaft 10 whose center is rotatably supported by the crankshaft 11. A clutch spring (not shown) for pressing the clutch disk 13 against the flywheel 12 is provided between the clutch disk 13 and the pressure plate 14.

  The clutch case 2 has a housing 3 and an upper lid 4 as shown in FIG. The front side of the housing 3 is joined to a crankcase (not shown) of the internal combustion engine, and the rear side is joined to a transmission case of the transmission. An oil reservoir 3a for storing oil 8 is formed by the bottom of the housing 3, and the level of the oil 8 stored in the oil reservoir 3a is high enough to allow the lower portion of the clutch cover 15 to be in contact with the oil. .

  As shown in FIG. 2, the upper lid 4 is detachably attached to the upper end portion 3b of the housing 3, and is removed from the housing 3 during maintenance of the clutch. The upper lid 4 is attached in a sealed state to the upper end 3b of the housing 3, and is formed in a flat plate shape for easy sealing. A nozzle 16 is inserted through the housing 3. The nozzle 16 is connected to the oil tank 6 by a pipe (not shown), and injects oil toward the clutch disk 13 to cool the clutch disk 13.

  As shown in FIG. 1, a through hole 4 a is formed in the upper lid 4. As shown in FIG. 1, the through hole 4 a is formed on the side where the oil 8 is swept up from the rotation center C of the flywheel 12 and the clutch cover 15. Therefore, the oil 8 raked upward by the flywheel 12, the clutch cover 15, etc. is efficiently discharged through the through hole 4 a and above the upper lid 4.

  As shown in FIG. 1, a communication passage 5 communicating with the through hole 4 a is provided on the upper surface of the upper lid 4. As shown in FIG. 1, the communication passage 5 integrally includes a first passage 5 a that communicates with the through hole 4 a and a second passage 5 b that extends from the first passage 5 a. The first passage 5 a is a rectangular tube or a cylindrical tube, and extends obliquely upward from the through hole 4 a of the upper lid 4. The extending direction is, for example, 45 ° ± 10 ° with respect to the horizontal line and the rotational tangent direction of the clutch cover 15. Therefore, the oil 8 that has been lifted obliquely upward by the clutch cover 15 or the like is smoothly lifted obliquely upward through the first passage 5a.

  The second passage 5b is a rectangular tube, a cylindrical tube, or the like, and extends continuously from the first passage 5a toward the oil tank 6. The 2nd channel | path 5b has the bottom face 5b1 which inclines diagonally downward toward the oil tank 6, and becomes a structure which can force the oil 8 toward the oil tank 6 with the bottom face 5b1. The oil 8 is prevented from flowing back to the first passage 5a by the inclination angle of the bottom surface 5b1.

  The diameter of the 1st channel | path 5a is so small that it leaves | separates from the through-hole 4a, and the diameter of the 2nd channel | path 5b becomes large, so that it leaves | separates from the 1st channel | path 5a. Accordingly, the hydraulic pressure of the oil 8 that has been lifted up in the first passage 5a is gradually increased by the first passage 5a, and the hydraulic pressure is gradually lowered by passing through the second passage 5b. Therefore, the lifting force of the oil 8 is converted into a hydraulic pressure by the first passage 5a, and the hydraulic pressure is released by the second passage 5b, whereby the oil 8 can be urged toward the oil tank 6. For attaching the communication passage 5 to the upper lid 4, the outer peripheral surface 5 e of the first passage 5 a is welded to the edge of the through hole 4 a, and the outer peripheral surface bottom portion 5 f at the tip of the second passage 5 b is welded to the upper surface of the upper lid 4. It is made by that.

  A guide 5c is integrally formed below the first passage 5a as shown in FIG. The guide 5 c extends obliquely downward from the through hole 4 a and covers a part of the outer peripheral edge of the clutch cover 15. Therefore, the oil 8 lifted up by the clutch cover 15 or the like is guided to the through hole 4a by the guide 5c.

  As shown in FIG. 1, the communication path 5 has an oil outlet 5d at the tip of the second path 5b. The oil outlet 5d is connected to the oil tank 6 by a connection pipe 7. The oil tank 6 includes a main body 6a that stores the oil 8, a lid 6b that closes an upper portion of the main body 6a, and an inlet pipe 6c. The inlet pipe 6c is attached to the lid portion 6b while penetrating the lid portion 6b. And it has the oil inlet 6c1 in the front-end | tip part, and the connection pipe 7 is connected to the oil inlet 6c1. The oil inlet 6c1 is substantially the same height as the upper lid 4 of the clutch case 2. Strictly speaking, the upper end of the oil inlet 6c1 is higher than the housing 3 and lower than the upper end of the oil outlet 5d of the communication path 5. It has become.

  As shown in FIG. 2, the oil 8 stored in the oil reservoir 3a adheres to the rotating clutch cover 15 and the like, and is lifted up in the rotation direction by the clutch cover 15 and the like. The oil 8 that has been raked up is guided to the through hole 4a by the guide 5c, and is raked up to the communication path 5 provided above the upper lid 4 through the through hole 4a. Then, the oil 8 flows down from the communication path 5 side to the oil tank 6 through the connection pipe 7 using the head, and is collected in the oil tank 6.

  The embodiment is formed as described above. In other words, the clutch case 2 has a housing 3 having a bottom portion and a flat plate-like upper lid 4 that is detachably attached to the upper side of the housing 3. A through-hole 4 a is formed in the upper lid 4 and communicates with the through-hole 4 a. 5 is provided on the upper side of the upper lid 4. Then, the oil 8 is lifted up to the communication path 5, and the oil 8 is discharged to the oil tank 6 side through the communication path 5.

  Therefore, the oil 8 is lifted upward from the upper cover 4 of the clutch case 2 by the clutch cover 15 or the like. Thereafter, the oil is discharged to the oil tank 6 side through a communication passage 5 provided on the upper side of the upper lid 4. Therefore, the height of the oil inlet 6c1 of the oil tank 6 can be made higher than the height of the clutch case 2, for example. Therefore, the oil inlet 6c1 of the oil tank 6 can be increased without enlarging the clutch case 2. In addition, the number of parts can be reduced compared to an oil recovery device having a pump or the like, and the structure is simple. Since the upper lid 4 has a flat plate shape, it can be easily attached in a sealed state to the housing 3, and the communication path 5 is provided on the upper side of the upper lid 4, so that it can be removed from the housing 3 together with the upper lid 4 or individually. It has excellent maintainability.

  As shown in FIG. 1, the through hole 4 a formed in the upper lid 4 is formed on the lifting side with respect to the rotation center C of the clutch cover 15. Therefore, after the oil 8 is swept up by the clutch cover 15 or the like, the oil 8 does not flow over the rotation center C through the lower side of the upper cover 4 as in the conventional case, and passes through the through hole 4a in front of the rotation center C. It is discharged above the upper lid 4. Therefore, the oil 8 is lifted up above the upper lid 4 by efficiently using the lifting force.

  As shown in FIG. 1, the communication passage 5 includes a first passage 5 a that extends obliquely upward from the through hole 4 a and in the rotational tangent direction of the clutch cover 15, a continuous extension from the first passage 5 a, and an oil tank 6. And a second passage 5b having a bottom surface 5b1 inclined obliquely downward toward the side. Accordingly, the oil 8 is scraped upward from the upper lid 4 along the first passage 5a by effectively utilizing the scraping force of the clutch cover 15 and the like. And after that, the oil 8 is urged | biased by the oil tank side using the inclination of the bottom face 5b1 of the 2nd channel | path 5b.

  As shown in FIG. 2, the diameter of the first passage 5a decreases as the distance from the through hole 4a increases. The diameter of the second passage 5b increases as the distance from the first passage 5a increases. Therefore, after the hydraulic pressure of the oil 8 is increased by the first passage 5a, the hydraulic pressure is released by the second passage 5b. Therefore, the lifting force of the oil 8 can be converted into the discharge force from the communication passage 5 side to the oil tank 6 side by the first passage 5a and the second passage 5b. Therefore, the oil 8 can flow smoothly to the oil tank 6 side.

  As shown in FIG. 2, a guide 5 c that extends downward from the through hole 4 a of the upper lid 4 and guides the oil 8 to the through hole 4 a is formed integrally with the communication path 5. Accordingly, the oil 8 is guided to the through hole 4a by the guide 5c, and is guided by the communication path 5 after passing through the through hole 4a. Moreover, since the guide 5c and the communication path 5 are integrally formed, they have a simple structure with little fear of liquid leakage.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) For example, the first passage 5a of the above-described embodiment has a continuously decreasing diameter without a step as shown in FIG. 1, and the second passage 5b has a diameter without a step. However, the first passage 5a may have a step and a reduced diameter, or the second passage 5b may have a step and a large diameter, or a combination thereof.
(2) The communication passage 5 of the above embodiment has a step between the second passage 5b and the oil outlet 5d as shown in FIG. 1, and the connection pipe 7 is connected to the oil outlet 5d by the step. It was easy to do. However, there may be a configuration in which there is no step between them and the connection pipe is connected to the inner periphery of the oil outlet.
(3) The 2nd channel | path 5b of the said embodiment had the bottom face 5b1 which has an inclination angle, as shown in FIG. However, the bottom surface of the second passage 5b extends in parallel with the upper lid 4, and a standing portion is provided between the bottom surface and the first passage 5a. The form which prevents the backflow to the channel | path 5a side may be sufficient.

It is front sectional drawing of an oil collection | recovery apparatus. It is the II-II sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Oil recovery apparatus 2 ... Clutch case 3 ... Housing 4 ... Upper lid 4a ... Through-hole 5 ... Communication path 5a ... First path 5b ... Second path 5c ... Guide 5d ... Oil outlet 6 ... Oil tank 6c1 ... Oil inlet 8 ... Oil 11 ... Crankshaft 12 ... Flywheel 13 ... Clutch disc 14 ... Pressure Plate 15 ... Clutch cover

Claims (5)

An oil clutch that collects oil collected at the bottom of the clutch case by an engine flywheel and a clutch and clutch cover attached to the flywheel, and then drains the oil from the clutch case to the oil tank. An oil recovery device,
The clutch case includes a housing having the bottom portion and a flat-plate upper lid that is detachably attached to an upper side of the housing. A through hole is formed in the upper lid, and a communication path communicating with the through hole is the upper lid. The oil recovery device for an oil clutch is configured such that the oil is lifted up to the communication path, and the oil is discharged to the oil tank side through the communication path. An oil recovery device for an oil clutch according to claim 1,
An oil recovery device for an oil clutch, wherein the through hole formed in the upper lid is formed on the side closer to the lifting side than the rotation center of the clutch cover. An oil recovery device for an oil clutch according to claim 1 or 2,
The communication passage includes a first passage extending obliquely upward from the through hole and in the rotational tangent direction of the clutch cover, and a bottom surface extending continuously from the first passage and inclined obliquely downward toward the oil tank side. An oil recovery device for an oil clutch, comprising: a second passage having the second passage. An oil recovery device for an oil clutch according to claim 3,
The oil recovery device for an oil clutch is characterized in that the diameter of the first passage decreases with increasing distance from the through hole, and the diameter of the second passage increases with increasing distance from the first passage. An oil recovery device for an oil clutch according to any one of claims 1 to 4,
An oil recovery device for an oil clutch, wherein a guide that extends downward from a through hole of the upper lid and guides oil to the through hole is integrally formed in the communication path.

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