JP2004257470A - Oil spraying clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil spraying clutch capable of securely spraying a lubricating oil to a friction surface of a clutch disc assembly, restricting temperature rise of the friction surface, and extending abrasion life of the clutch disc assembly. <P>SOLUTION: In a bearing holder 21 in a release bearing 22, a spraying mechanism 23 to spray the lubricating oil 15 toward the friction surface of the clutch disc assembly 4 is formed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an oil spray clutch.
[0002]
[Prior art]
Generally, in an oil spray clutch of a vehicle, lubricating oil is sprayed on a friction surface of a clutch disk assembly.
[0003]
A conventional oil spray clutch is shown in FIG. 4, in which 1 is a clutch housing, 2 is a flywheel connected to a crankshaft 3 driven by an engine, 4 is a clutch disk assembly, 5 is a pressure plate, Reference numeral 6 denotes an injection nozzle for spraying lubricating oil supplied from an oil pump (not shown) to the clutch disk assembly 4, and reference numeral 7 denotes an oil pan attached to a lower portion of the clutch housing 1, and includes a flywheel 2, a clutch disk assembly. 4. The tip end of the injection nozzle 6 is housed in the clutch housing 1. Further, the lubricating oil accumulated in the oil pan 7 can be returned to the oil pump. The oil spray clutch shown in FIG. 4 is a coil spring lever type clutch, and includes a coil spring 16 for pressing the friction surface of the clutch disc assembly 4 against the flywheel 2 by urging the pressure plate 5, and a clutch. An input shaft 17 on which the disk assembly 4 is fitted, a release lever 18 for separating the pressure plate 5 from the friction surface of the clutch disk assembly 4 against the urging force of the coil spring 16, a coil spring 16 and a release lever 18; , A cylindrical retainer 20 attached to the clutch housing 1 and rotatably supporting the input shaft 17, and a bearing housing slidably fitted to the retainer 20 in the axial direction thereof. And da 21, and a release bearing 22 for absorbing the relative rotation difference between the bearing holder 21 and the release lever 18 when cutting the and clutch are held by the bearing holder 21.
[0004]
The details of the clutch disk assembly 4 are shown in FIGS. 5 and 6, and reference numeral 8 is externally fitted to the input shaft 17 shown in FIG. 4 which is arranged concentrically with the crankshaft 3 in the clutch housing 1, and when the clutch is connected or disconnected. A spline hub slidable with respect to the input shaft 17, 9 is a disk body fixed to the outer periphery of the spline hub 8, 10 is a donut plate-shaped clutch plate attached to the disk body 9, and 11 is a clutch plate 10 A cushion plate mounted on the outer peripheral portion so as to protrude radially outward of the clutch plate 10, a facing 12 mounted on the pressure plate 5 (see FIG. 4) side of the cushion plate 11, and a flywheel 2 on the cushion plate 11 Facing (see Fig. 4) Deployment plate 11 is in a state of being sandwiched between the facing 12 and 13.
[0005]
As shown in FIGS. 6 and 7, the cushion plate 11 is divided into a plurality of pieces in the circumferential direction of the clutch plate 10, and is formed in a substantially disk shape as a whole by being attached to the clutch plate 10. On the mounting side of the cushion plate 11 with respect to the clutch plate 10, a long notch 11 a and a short notch 11 b extending in the circumferential direction are formed on both sides in the circumferential direction, and when the cushion plate 11 is mounted on the clutch plate 10. The notch 11a and the notch 11b of the adjacent cushion plate 11 face each other.
[0006]
Further, when the cushion plate 11 is attached to the clutch plate 10, the notches 11a and 11b are not covered by the clutch plate 10 (see FIG. 8).
[0007]
As shown in FIG. 6, the facings 12 and 13 are divided into a plurality of pieces in the circumferential direction of the clutch plate 10 or have a disc shape. The facings 12 and 13 are attached to the cushion plate 11 and are formed in a substantially disc shape as a whole. When the facings 12 and 13 are attached to the cushion plate 11, the inner peripheral ends of the facings 12 and 13 cover the notches 11 a and 11 b of the cushion plate 11 with a gap therebetween, and the cuts in the cushion plate 11 are formed. The oil passages 14 are formed at regular intervals in the circumferential direction by portions of the notches 11a and 11b that are not covered by the facings 12 and 13.
[0008]
When the vehicle is driven and the clutch pedal is not depressed, the surfaces of the facings 12 and 13 of the clutch disk assembly 4 are connected to the surfaces of the pressure plate 5 and the flywheel 2, and the power of the engine is transmitted to the transmission.
[0009]
When the clutch pedal is depressed, the surfaces of the facings 12 and 13 of the clutch disk assembly 4 separate from the contact surfaces of the pressure plate 5 and the flywheel 2, and the power of the engine is not transmitted to the transmission.
[0010]
In the case of a half clutch, the surfaces of the facings 12 and 13 of the clutch disk assembly 4 and the surfaces of the pressure plate 5 and the flywheel 2 slide in a contact state.
[0011]
The lubricating oil 15 from the oil pump is sprayed from the injection nozzle 6 toward the vicinity between the clutch plate 10 and the facings 12 and 13. For this reason, the lubricating oil 15 lubricates the surface of the facing 12 which is the friction surface of the clutch disk assembly 4 and is also supplied from the facing 12 to the facing 13 via the oil flow path 14, and the surface of the facing 13 which is the friction surface Perform lubrication.
[0012]
Incidentally, as the oil spray clutch as described above, there is, for example, one disclosed in Patent Document 1.
[0013]
[Patent Document 1]
JP-A-61-130622
[Problems to be solved by the invention]
However, in the conventional oil spray clutch as described above, as shown in FIG. 4, the oil injection port of the injection nozzle 6 is disposed outside the clutch cover 19, and is far away from the friction surface of the clutch disk assembly 4. Therefore, it is difficult to reliably spray the lubricating oil 15 onto the friction surface of the clutch disk assembly 4 due to the obstruction of the release lever 18 and the like inside the clutch cover 19, and the friction surface easily rises in temperature, and the clutch disk assembly No. 4 had the disadvantage that the wear life was shortened.
[0015]
Although not shown, in the case of a diaphragm type oil spray clutch, it is still difficult to reliably spray the lubricating oil onto the friction surface of the clutch disk assembly because of the interference of the diaphragm inside the clutch cover. Similarly, there has been a problem that the temperature of the friction surface easily rises and the wear life of the clutch disk assembly is shortened.
[0016]
In view of such circumstances, the present invention provides an oil spray that can reliably spray lubricating oil onto a friction surface of a clutch disk assembly, can suppress a rise in temperature of the friction surface, and can prolong the wear life of the clutch disk assembly. It is intended to provide a clutch.
[0017]
[Means for Solving the Problems]
The present invention relates to an oil spray clutch, wherein a spraying mechanism for spraying lubricating oil toward a friction surface of a clutch disk assembly is formed on a bearing holder of a release bearing.
[0018]
According to the above means, the following effects can be obtained.
[0019]
The lubricating oil is reliably sprayed from the spray mechanism formed on the bearing holder of the release bearing to the friction surface of the clutch disk assembly, so that the temperature increase of the friction surface is suppressed and the wear life of the clutch disk assembly is extended. It will be.
[0020]
In the oil spray clutch, an oil reservoir formed on an inner peripheral surface side of a bearing holder externally fitted to the retainer and into which lubricating oil is introduced; An oil passage formed so as to extend, and an oil formed in a gap between the bearing holder and the inner peripheral surface of the inner race of the release bearing so as to communicate with the oil passage and open an end on the clutch disc assembly side. A spraying mechanism can be configured from the jet path and the lubricating oil. In this case, after the lubricating oil is introduced into the oil reservoir formed on the inner peripheral surface side of the bearing holder, the oil passage is formed from the oil reservoir. The oil is then guided to the oil ejection path, and is sprayed from the oil ejection path all the way to the friction surface of the clutch disk assembly.
[0021]
In the oil spray clutch, it is preferable that the end of the bearing holder on the clutch disk assembly side is formed in a tubular shape so that the direction of the lubricating oil discharged from the open end of the oil ejection path is directed toward the outer periphery. In this case, the lubricating oil is more reliably sprayed onto the friction surface of the clutch disk assembly, the amount of oil supplied to the friction surface of the clutch disk assembly increases, and the temperature rise of the friction surface can be more efficiently reduced. It can be suppressed.
[0022]
Further, the oil spray clutch may be configured so that a part of lubricating oil can be introduced into the inside of the release bearing. In this case, the lubrication of the friction surface of the clutch disk assembly and the inside of the release bearing are simultaneously performed. Lubrication can also be performed, which is effective in smoothing the operation of the release bearing.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
FIGS. 1 and 2 show an example of an embodiment of the present invention. In the drawings, portions denoted by the same reference numerals as those in FIGS. 4 to 8 represent the same components. And a spray mechanism 23 for spraying the lubricating oil 15 toward the friction surface of the clutch disk assembly 4.
[0025]
FIGS. 1 and 2 show a diaphragm type oil spray clutch, that is, a clutch disk assembly 4 by urging a pressure plate 5 by using an elastic force of a diaphragm 24 instead of the coil spring 16 shown in FIG. The friction surface is pressed against the flywheel 2. In the illustrated example, the lubricating oil 15 is formed on the inner peripheral surface side of the bearing holder 21 fitted to the retainer 20. An oil reservoir 23a, an oil passage 23b formed to extend outward from a circumferentially required portion of the oil reservoir 23a, and an end on the clutch disk assembly 4 side communicating with the oil passage 23b and being open. The clearance between the bearing holder 21 and the inner peripheral surface of the inner race 22a of the release bearing 22 is It is so as to constitute the spray mechanism 23 from the oil ejection passage 23c to be. Incidentally, a connection hose 25 connected to an oil pump (not shown) is connected to the oil reservoir 23a.
[0026]
The end of the bearing holder 21 on the clutch disk assembly 4 side is formed in a tubular shape so that the lubricating oil 15 discharged from the open end of the oil ejection passage 23c is directed toward the outer periphery.
[0027]
In FIG. 2, reference numeral 22b denotes an outer race of the release bearing 22, 22c denotes a ball interposed between the inner race 22a and the outer race 22b of the release bearing 22, and 22d and 22e enclose the ball 22c of the release bearing 22. This is an oil seal for preventing leakage of grease or the like to the outside.
[0028]
Next, the operation of the above illustrated example will be described.
[0029]
The lubricating oil 15 is introduced into an oil reservoir 23a formed on the inner peripheral surface side of the bearing holder 21 from an oil pump (not shown) via a connection hose 25, and then is introduced from the oil reservoir 23a to the oil passage 23b. Through the oil ejection passage 23c, and is sprayed from the oil ejection passage 23c all around the friction surface of the clutch disk assembly 4 without being obstructed by the diaphragm 24 or the like inside the clutch cover 19. Therefore, the temperature rise of the friction surface is suppressed, and the wear life of the clutch disk assembly 4 is extended.
[0030]
Here, the end of the bearing holder 21 on the clutch disk assembly 4 side is formed in a tubular shape, and the direction of the lubricating oil 15 discharged from the open end of the oil ejection passage 23c is directed to the outer periphery. Numeral 15 is a shape that can be more reliably sprayed onto the friction surface of the clutch disk assembly 4, so that the amount of oil supplied to the friction surface of the clutch disk assembly 4 increases, and the temperature rise of the friction surface is more efficiently suppressed. It is possible to do.
[0031]
In this way, the lubricating oil 15 can be reliably sprayed onto the friction surface of the clutch disk assembly 4, and the temperature rise of the friction surface can be suppressed, and the wear life of the clutch disk assembly 4 can be extended.
[0032]
FIG. 3 shows another example of the embodiment of the present invention. In the drawing, the portions denoted by the same reference numerals as those in FIGS. 1 and 2 represent the same components, and the basic configuration is shown in FIGS. 2 is the same as that shown in FIG. 2, but the feature of this example is that the oil seals 22d and 22e for preventing grease or the like sealed in the ball 22c of the release bearing 22 from leaking to the outside. Then, the oil seal 22e provided on the anti-clutch disc assembly 4 side is removed, and the inside of the release bearing 22, that is, the ball 22c part interposed between the inner race 22a and the outer race 22b of the release bearing 22 is moved to the bearing holder 21. A part of the lubricating oil 15 is released from the oil release passage 23c through a gap 23d between the oil and the release bearing 22. It is obtained by adapted that can be introduced into the interior of the ring 22.
[0033]
3, the internal lubrication of the release bearing 22 can be performed simultaneously with the lubrication of the friction surface of the clutch disk assembly 4, which is effective in smoothing the operation of the release bearing 22.
[0034]
In addition, the oil spray clutch of the present invention is not limited to the illustrated example described above, and is not limited to the diaphragm type clutch, but can be applied to a coil spring lever type clutch. Of course, various changes can be made without departing from the scope.
[0035]
【The invention's effect】
As described above, according to the oil spray clutch according to claims 1 to 4 of the present invention, the lubricating oil can be reliably sprayed onto the friction surface of the clutch disk assembly, and the temperature rise of the friction surface can be suppressed. Thus, an excellent effect of extending the wear life of the clutch disk assembly can be achieved.
[Brief description of the drawings]
FIG. 1 is an overall vertical sectional view of an example of an embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of an example of an embodiment of the present invention.
FIG. 3 is an enlarged sectional view of a main part of another example of the embodiment of the present invention.
FIG. 4 is an overall vertical sectional view showing an example of a conventional oil spray clutch.
5 is an enlarged vertical sectional view of the clutch disk assembly shown in FIG.
6 is a view taken in the direction of arrows VI-VI in FIG. 5;
FIG. 7 is a perspective view of a cushion plate used in the clutch disk assembly of FIG.
FIG. 8 is a partially enlarged cross-sectional view of a clutch plate, a cushion plate, and a facing portion of the facing in the clutch disk assembly of FIG. 5;
[Explanation of symbols]
4 Clutch Disc Assembly 15 Lubricating Oil 19 Clutch Cover 20 Retainer 21 Bearing Holder 22 Release Bearing 22a Inner Race 22c Outer Race 22c Ball 22d Oil Seal 22e Oil Seal 23 Spraying Mechanism 23a Oil Reservoir 23b Oil Passage 23c Oil Spout 23d Gap 24 Diaphragm 25 Connecting hose

Claims (4)

An oil spray clutch, wherein a spray mechanism for spraying lubricating oil toward a friction surface of a clutch disk assembly is formed on a bearing holder of a release bearing. An oil reservoir formed on the inner peripheral surface side of the bearing holder externally fitted to the retainer and into which lubricating oil is introduced, and an oil passage formed to extend outward from a circumferentially required portion of the oil reservoir. And an oil ejection passage formed in a gap between the bearing holder and the inner peripheral surface of the inner race of the release bearing so as to communicate with the oil passage and open the end on the clutch disc assembly side. The oil spray clutch according to claim 1, wherein the oil spray clutch is configured. 3. The oil spray clutch according to claim 2, wherein the end of the bearing holder on the clutch disk assembly side is formed in a tubular shape, and the direction of the lubricating oil discharged from the open end of the oil ejection passage is directed to the outer periphery. 4. The oil spray clutch according to claim 2, wherein a part of the lubricating oil can be introduced into the release bearing.

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