JP2009293665A - Cooling structure of hydraulic clutch release mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling structure of a hydraulic clutch release mechanism capable of improving responsiveness, while preventing early deterioration in the hydraulic clutch release mechanism, by improving durability in the hydraulic clutch release mechanism. <P>SOLUTION: An air flowing hole 26 for making air flow between an external part and a space 17 between an outer peripheral part of an input shaft 2 and an inner peripheral part of an inside housing 14, is arranged in one end part of an outside housing 15 installed on a partition wall 5 of a transmission case 4 and a clutch housing 3. A screw part 27 is arranged in the outer peripheral part of the input shaft 2, for sending in air in the space 17 between the outer peripheral part of the input shaft 2 and the inner peripheral part of the inside housing 14 in the axial direction of the input shaft 2. This screw part 27 is formed so as to incline rightward and downward in the axial direction of the input shaft 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cooling structure for a hydraulic clutch release mechanism, and in particular, a hydraulic clutch release mechanism that surrounds an input shaft of a transmission that penetrates a partition wall that partitions a clutch housing and a transmission case and protrudes into the clutch housing. Relates to the cooling structure.

  A clutch device used in a vehicle such as an automobile is housed in a crunch housing adjacent to a transmission case in which a transmission mechanism such as a transmission gear is housed via a partition, and selectively transmits power from an internal combustion engine to the transmission. There is something to transmit or block.

  This clutch device is disposed opposite to a flywheel that rotates integrally with a crankshaft of an internal combustion engine, and a clutch disk that rotates integrally with an input shaft of a transmission, and a clutch disk that presses the clutch disk toward the flywheel. A clutch plate having a pressure plate that engages the flywheel, a diaphragm spring that urges the pressure plate toward the clutch disk, and pressing the inner peripheral end of the diaphragm spring to reduce the pressing force of the diaphragm spring against the pressure plate. Some have a clutch release mechanism for releasing.

  In the clutch release mechanism of this clutch device, a release hub having a release bearing disposed so as to surround the periphery of an input shaft that penetrates the partition wall and protrudes from the transmission case into the clutch housing, and one end portion of the clutch release mechanism are connected to the release hub. A release fork, and a clutch release cylinder that abuts the other end of the release fork and swings the release fork by hydraulic pressure, and the clutch release cylinder is installed outside the clutch housing ( For example, see Patent Document 1).

  In this clutch release mechanism, when the clutch pedal is depressed, hydraulic oil is supplied from the master cylinder to the release cylinder, and the release fork is swung by the release by this hydraulic pressure, and the release hub is connected to the inner periphery of the diaphragm spring via the release bearing. By pressing the end, the pressing force of the diaphragm spring against the pressure plate is released.

  By the way, in the clutch release mechanism having such a configuration, the clutch release cylinder is installed outside the clutch housing, and the release bearing and the release hub are operated by a long release fork. The clutch release mechanism becomes large.

To reduce the size of the clutch release mechanism, on the other hand, one end is attached to the partition that separates the transmission case and the clutch housing, the other end is open, and passes through the partition and protrudes into the clutch housing. A hollow housing surrounding the input shaft of the transmission mechanism, a cylinder chamber provided in the hollow housing, an annular piston slidably provided in the cylinder chamber and movable in the axial direction of the input shaft, and attached to the annular piston Some of them are provided with a release bearing that is movable in the axial direction of the input shaft together with an annular piston.
In this clutch release mechanism, by supplying hydraulic oil to the cylinder chamber, the annular piston and the release bearing are moved in the axial direction of the input shaft, and the inner peripheral end of the diaphragm spring is pressed by the release bearing, so that the diaphragm spring The pressing force on the pressure plate is released (see, for example, Patent Document 2).

In this clutch release mechanism, since it is arranged around the input shaft adjacent to the partition wall, it is possible to reduce the size of the transmission, and to reduce the size of the transmission by the amount that the clutch release mechanism can be reduced. .
JP 2001-12504 A Japanese Patent Laid-Open No. 2003-156069

  However, in such a conventional hydraulic clutch release mechanism, since one end of the hollow housing is directly attached to the partition wall of the transmission case, the heat of the high-temperature lubricating oil is transmitted. That is, a transmission mechanism such as a plurality of transmission gears for transmitting power from the internal combustion engine to the drive wheels is provided in the transmission case, and lubrication for lubricating and cooling the transmission mechanism is provided in the transmission case. Oil is circulating.

  Since this lubricating oil becomes very hot, if the heat of this lubricating oil is transmitted to the hydraulic clutch release mechanism via the partition wall, the durability of the hydraulic clutch release mechanism deteriorates, and the hydraulic type There is a possibility that deterioration of the clutch release mechanism is accelerated. Moreover, the responsiveness of the hydraulic clutch release mechanism may deteriorate due to the high temperature of the hydraulic oil supplied to the cylinder chamber.

  The present invention has been made to solve the above-described conventional problems, and improves the durability of the hydraulic clutch release mechanism to prevent the hydraulic clutch release mechanism from deteriorating early. An object of the present invention is to provide a cooling structure for a hydraulic clutch release mechanism that can improve responsiveness.

  In order to achieve the above object, the hydraulic clutch release mechanism cooling structure according to the present invention is (1) housed in a crunch housing adjacent to a transmission case housing a transmission mechanism via a partition wall, A hydraulic clutch release mechanism that operates a clutch mechanism that selectively transmits or cuts power to the speed change mechanism, wherein one end portion is attached to the partition wall and the other end portion is opened, and passes through the partition wall. A hollow housing surrounding the input shaft of the speed change mechanism protruding into the clutch housing, a cylinder chamber provided in the hollow housing, and slidably provided in the cylinder chamber and movable in the axial direction of the input shaft An annular piston, and a release bearing attached to the annular piston and movable together with the annular piston in the axial direction of the input shaft; In the hydraulic clutch release mechanism that moves the annular piston and the release bearing in the axial direction of the input shaft by supplying hydraulic oil to the cylinder chamber so as to disengage the clutch mechanism. Provided with an air flow hole through which air flows between the outer periphery of the input shaft and the inner periphery of the hollow housing and the outside, and the outer periphery of the input shaft or the inner periphery of the hollow housing. It is comprised from what provided the ventilation means which sends the air in the said space along the axial direction of the said input shaft in the part.

  With this configuration, the hollow housing attached to the partition partitioning the transmission case and the clutch housing is provided with an air circulation hole for allowing air to flow between the input shaft of the transmission and the space between the hollow housing and the outside. Since the air blowing means for sending the air in the space along the axial direction of the input shaft is provided on the outer peripheral portion of the input shaft or the inner peripheral portion of the hollow housing, The air taken into the space between the peripheral parts is sent along the axial direction of the input shaft by the blowing means.

  For this reason, even when the heat of the lubricating oil is transmitted from the transmission case to the hydraulic clutch release mechanism via the partition wall, the hollow housing, the annular piston and the release bearing can be cooled, and the hydraulic clutch release The durability of the mechanism can be improved, and the hydraulic clutch release mechanism can be prevented from prematurely deteriorating. In addition, since the hydraulic oil supplied to the cylinder chamber can be cooled, it is possible to prevent the hydraulic oil from reaching a high temperature and to prevent the responsiveness of the hydraulic clutch release mechanism from deteriorating. Can do.

  (1) In the cooling structure of the hydraulic clutch release mechanism according to (1), (2) the air circulation hole is provided at one end of the hollow housing, and the air blowing means removes air flowing into the space from the air circulation hole. It consists of what feeds toward the opening of the said hollow housing.

  With this configuration, the air taken in the space between the hollow housing and the input shaft is sent from the air circulation hole provided at one end of the hollow housing along the input shaft toward the opening of the hollow housing by the blowing means. . For this reason, the hydraulic fluid supplied to the hollow housing, the annular piston, the release bearing, and the cylinder chamber can be cooled.

  (1) In the cooling structure of the hydraulic clutch release mechanism according to (1), (3) the air circulation hole is provided at one end of the hollow housing, and the air blowing means flows into the space from the opening of the hollow housing. Is sent to the air flow hole of the hollow housing.

  With this configuration, the air taken into the space between the hollow housing and the input shaft from the opening of the hollow housing is sent to the air circulation hole provided at one end of the hollow housing along the input shaft by the blowing means. . For this reason, the hydraulic fluid supplied to the hollow housing, the annular piston, the release bearing, and the cylinder chamber can be cooled.

  In the cooling structure of the hydraulic clutch release mechanism according to the above (1) to (3), (4) the air blowing means is formed on an outer peripheral portion of the input shaft so as to send air along the axial direction of the input shaft. It is comprised from the thread part which inclines with respect to the axial direction of the said input shaft.

  With this configuration, by forming a screw portion that is inclined with respect to the axial direction of the input shaft on the outer peripheral portion of the input shaft, air can be fed along the axial direction of the input shaft, so the configuration of the blowing means is simplified. Can be

  In addition, the direction of the slanting of the screw part is set so that air is sent from one end of the hollow housing to the opening, or air is sent from one end of the hollow housing to one end, so that the air blowing direction is easy Can be set to

  In the cooling structure of the hydraulic clutch release mechanism according to the above (1) to (3), (5) the air blowing means is provided on an outer peripheral portion of the input shaft so as to send air along the axial direction of the input shaft. It is comprised from what consists of a helical guide member which inclines and continues with respect to the axial direction of the said input shaft.

  With this configuration, by forming a spiral guide member that is inclined with respect to the axial direction of the input shaft on the outer peripheral portion of the input shaft, air can be fed along the axial direction of the input shaft. The configuration can be simplified.

  In addition, the direction in which the guide member is inclined is set so that air is sent from one end of the hollow housing to the opening, or is set so that air is sent from the opening of the hollow housing to one end. Can be set to

(1) In the cooling structure of the hydraulic clutch release mechanism according to (1) to (3), (6) the blade is provided on the outer peripheral portion of the input shaft and feeds air along the axial direction of the input shaft. It consists of members.
With this configuration, air can be fed along the axial direction of the input shaft by the blade member provided on the outer peripheral portion of the input shaft, so that the configuration of the blowing means can be simplified.

  In addition, the direction of the blade member is set so that air is sent from one end of the hollow housing to the opening, or is set so that air is sent from the opening of the hollow housing to one end, thereby facilitating the air blowing direction. Can be set.

  In the cooling structure of the hydraulic clutch release mechanism according to the above (1) to (3), (7) the air blowing means is constituted by a screw portion formed on an inner peripheral portion of the hollow housing, and the screw portion is By inclining with respect to the axial direction of the input shaft, air is fed in the axial direction of the input shaft as the input shaft rotates.

  With this configuration, a screw portion that is inclined with respect to the axial direction of the input shaft is formed on the inner peripheral portion of the hollow housing portion, so that air can be fed along the screw portion in the axial direction of the input shaft due to the viscosity of the air. Therefore, the structure of the air blowing means can be simplified.

  In addition, the direction of the slanting of the screw part is set so that air is sent from one end of the hollow housing to the opening, or air is sent from one end of the hollow housing to one end, so that the air blowing direction is easy Can be set to

  According to the present invention, it is possible to improve the durability of the hydraulic clutch release mechanism, to prevent the hydraulic clutch release mechanism from being deteriorated early, and to improve the responsiveness. A cooling mechanism for the release mechanism can be provided.

  Embodiments of a cooling structure for a hydraulic clutch release mechanism according to the present invention will be described below with reference to the drawings.

(First embodiment)
FIGS. 1-5 is a figure which shows 1st Embodiment of the cooling structure of the hydraulic clutch release mechanism based on this invention.

First, the configuration will be described.
In FIG. 1, a clutch device 1 is arranged between an internal combustion engine (not shown) and a manual transmission, and is transmitted from a crankshaft (not shown) of the internal combustion engine to an input shaft (input shaft) 2 of the manual transmission. Used to interrupt power.

  The clutch device 1 is housed in a clutch housing 3, and one (left side in FIG. 1) of the clutch housing 3 is joined to a crankcase (not shown) of the internal combustion engine. The other of the clutch housing 3 (the right side in FIG. 1) is joined to the transmission case 4, and the clutch housing 3 is adjacent to the transmission case 4 via the partition wall 5.

A transmission mechanism such as a plurality of transmission gears is housed in the transmission case 4 (not shown), and the transmission gears are lubricated and cooled by lubricating oil. The transmission mechanism is provided with a transmission gear on the input shaft 2 and an output shaft provided in parallel with the input shaft 2, and the power from the internal combustion engine is increased by changing the meshing position of the transmission gear by the synchronizer mechanism. The gears are shifted and transmitted to drive wheels (not shown).
Further, in the clutch housing 3, a flywheel 6 is fixed to an end portion of the crankshaft, and a plurality of circumferential positions of the clutch cover 7 are fastened to the mounting bolts 8 on the flywheel 6. The clutch cover 7 is fixed.

  The clutch cover 7 is provided with a diaphragm spring 9, which presses the clutch disk 11 against the flywheel 6 by urging the pressure plate 10 toward the clutch disk 11, thereby pressing the clutch disk 11. The flywheel 6 is engaged. The diaphragm spring 9 has a radially intermediate portion held by a spring retainer 9 a and an outer peripheral portion in contact with the pressure plate 10.

  The clutch disk 11 is disposed opposite to the flywheel 6, and the boss part 11 a of the clutch disk 11 is spline-fitted to the spline part 2 a of the input shaft 2. The clutch disk 11 is fixed in the circumferential direction with respect to the input shaft 2, is slidable in the axial direction, and rotates integrally with the input shaft 2.

The input shaft 2 is disposed concentrically with the crankshaft, and one end portion thereof penetrates the partition wall 5 and projects into the clutch housing 3.
The clutch disk 11 is pressed to the flywheel 6 side by the diaphragm spring 9 via the pressure plate 10, and this state is a connection state of the clutch device 1, and the crankshaft driving force is applied from the flywheel 6. It is transmitted to the input shaft 2 through the clutch cover 7 and the clutch disk 11.

The clutch device 1 is operated by a hydraulic clutch release mechanism (hereinafter simply referred to as a release mechanism) 12, and the release mechanism 12 cuts off power transmitted from the crankshaft to the input shaft 2. That is, the clutch is disengaged.
In the present embodiment, the diaphragm spring 9, the pressure plate 10, and the clutch disk 11 constitute a clutch mechanism.

  As shown in FIGS. 2 and 3, the release mechanism 12 includes a hollow housing 13, and the hollow housing 13 includes an inner housing 14 and an outer housing 15 provided integrally with the inner housing 14. The inner housing 14 is installed on the outer periphery of the input shaft 2 so as not to contact the input shaft 2 so as to surround the input shaft 2.

  A plurality of boss portions 15 a formed with insertion holes 15 b are provided at one end of the outer housing 15 so as to be spaced apart in the circumferential direction. Bolts 16 are inserted into the insertion holes 15 b and the bolts 16 are connected to the partition walls 5. By attaching, the hollow housing 13 is attached to the partition wall 5.

  The other end of the inner housing 14 is open, and a space 17 is defined between the inner periphery of the inner housing 14 and the outer periphery of the input shaft 2. The outer housing 15 is positioned on the outer periphery of the inner housing 14 so as to surround the inner housing 14, and an annular piston 18 is accommodated between the inner housing 14 and the outer housing 15. The input shaft 2 is movable in the axial direction.

  The annular piston 18 includes a small-diameter portion 18a accommodated in the inner housing 14 and the outer housing 15, and a large-diameter portion 18b whose diameter increases from the small-diameter portion 18a toward the diaphragm spring 9 side. The hydraulic oil is supplied to the cylinder chamber 19 defined by the housing 15 and the small diameter portion 18 a of the annular piston 18. That is, the hollow housing 13 is provided with a cylinder chamber 19 in which an annular piston 18 is slidably accommodated.

Further, a seal member 25 is provided at the end of the small diameter portion 18 a of the annular piston 18, and this seal member 25 is provided on the outer peripheral surface of the inner housing 14 so as to prevent the hydraulic oil from leaking from the cylinder chamber 19. And the inner peripheral surface of the outer housing 15.
A release bearing 20 is provided on the inner peripheral portion of the large-diameter portion 18b of the annular piston 18. The release bearing 20 includes an outer race 21 fixed to the inner peripheral portion of the large-diameter portion 18b, and an outer race. An inner race 22 is provided on the inner peripheral portion of the inner race 21 so as to be rotatable via a sphere 23.

  One end of a pipe 24 (see FIG. 3) is connected to the cylinder chamber 19, and the other end of the pipe 24 is connected to a hydraulic path of a master cylinder (not shown). The master cylinder supplies hydraulic oil to the cylinder chamber 19 through the pipe 24 when the clutch pedal is depressed. When the hydraulic oil is supplied to the cylinder chamber 19, the annular piston 18 is connected to the input shaft 2. The release bearing 20 moves to the diaphragm spring 9 side along the axial direction of the input shaft 2 together with the annular piston 18 along the axial direction.

  Then, the inner race 22 of the release bearing 20 pressurizes the inner peripheral end of the diaphragm spring 9 while rotating together with the diaphragm spring 9. At this time, the diaphragm spring 9 is displaced in a direction in which the outer peripheral side is separated from the clutch disk 11 with the holding portion by the spring retainer 9a as a fulcrum, and the pressing of the clutch disk 11 against the flywheel 6 is released. In this way, power transmission of the clutch device 1 is interrupted. That is, based on the operation of the clutch pedal, the release bearing 20 moves forward together with the annular piston 18 to disconnect the clutch.

  In addition, an air circulation hole 26 is provided in one end portion of the outer housing 15 that is one end portion of the hollow housing 13, that is, an attachment portion on the partition wall 5 side of the outer housing 15. The air is circulated between a space 17 between the outer peripheral portion of 2 and the inner peripheral portion of the inner housing 14 and the outside. The air circulation holes 26 are formed at a plurality of places, for example, three places in the circumferential direction of the outer housing 15.

  Further, as shown in FIG. 4, a screw portion 27 is formed on the outer peripheral portion of the input shaft 2, and the screw portion 27 allows air taken in from the air circulation hole 26 along the axial direction of the input shaft 2. In this way, it is inclined downward to the right with respect to the axial direction of the input shaft 2 so as to be fed into the opening of the inner housing 14. In the present embodiment, the screw portion 27 constitutes a blowing means.

  Further, as shown in FIG. 2, a coil spring 28 is interposed between the inner housing 14 and the annular piston 18, and this coil spring 28 urges the annular piston 18 toward the diaphragm spring 9 to release it. By lightly pressing the inner race 22 of the bearing 20 against the inner peripheral end of the diaphragm spring 9, the annular piston 18 is prevented from coming out of the cylinder chamber 19.

  A dust cover 29 is attached to the outer peripheral portions of the outer housing 15 and the annular piston 18.

  Thus, in the present embodiment, the space between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14 is formed at one end portion of the outer housing 15 attached to the transmission case 4 and the partition wall 5 of the clutch housing 3. An air circulation hole 26 for allowing air to flow between the outside and the outside is provided, and air in the space 17 between the outer periphery of the input shaft 2 and the inner periphery of the inner housing 14 is provided on the outer periphery of the input shaft 2. Since the screw portion 27 for feeding along the axial direction of the input shaft 2 is provided, and this screw portion 27 is formed to be inclined to the lower right with respect to the axial direction of the input shaft 2, the input shaft 2 is In FIG. 4, when rotating in the W direction, the air taken into the space 17 from the air circulation hole 26 is input by the screw portion 27. It can be discharged from the opening of the inner housing 14 by feeding in the direction of arrow A along the axial direction of the shaft 2.

  For this reason, when heat of lubricating oil for lubricating and cooling the transmission mechanism is transmitted from the transmission case 4 to the release mechanism 12 via the partition wall 5, the annular piston 18, the release bearing 20, and the outer side are transmitted via the inner housing 14. The housing 15 can be cooled, the durability of the release mechanism 12 can be improved, and the release mechanism 12 can be prevented from premature deterioration. Further, since the hydraulic oil supplied to the cylinder chamber 19 can be cooled, it is possible to prevent the hydraulic oil from becoming high temperature and to prevent the responsiveness of the release mechanism 12 from being deteriorated. Can do.

  In addition to this, air can be fed in the axial direction of the input shaft 2 by forming the screw portion 27 on the outer peripheral portion of the input shaft 2, so that the configuration of the blowing means can be simplified.

  In the present embodiment, the screw portion 27 is formed so as to incline to the lower right with respect to the axial direction of the input shaft 2. However, as shown in FIG. You may form so that it may incline to the lower left with respect to the axial direction.

  In this way, the air taken in from the opening of the inner housing 14 can be sent to the air circulation hole 26 along the axial direction of the input shaft 2 as shown by the arrow B, and can be exhausted from the air circulation hole 26. The release mechanism 12 can be cooled.

(Second Embodiment)
6 and 7 are views showing a second embodiment of the cooling structure of the hydraulic clutch release mechanism according to the present invention. In the present embodiment, only the configuration of the air blowing means is different from that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
In FIG. 6, a spiral guide member 31 is formed on the outer peripheral portion of the input shaft 2, and this guide member 31 allows the air taken in from the air circulation hole 26 to move inward along the axial direction of the input shaft 2. It is continuously inclined to the lower right with respect to the axial direction of the input shaft 2 so as to be fed into the opening of the housing 14. In the present embodiment, the spiral guide member 31 constitutes a blowing means.

  In the present embodiment, a space 17 between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14 and the outside are provided at one end portion of the outer housing 15 attached to the transmission case 4 and the partition wall 5 of the clutch housing 3. An air circulation hole 26 is provided to allow air to flow between the input shaft 2 and air in the space 17 between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14 at the outer peripheral portion of the input shaft 2. A spiral guide member 31 that is fed along the axial direction of the input shaft 2 is provided, and the guide member 31 is formed so as to be inclined to the lower right with respect to the axial direction of the input shaft 2. When rotating, the air taken into the space 17 from the air circulation hole 26 is indicated by an arrow A by the guide member 31. It can be discharged from the opening of the inner housing 14 by feeding along the axial direction of the sea urchin input shaft 2.

  In addition, since the spiral guide member 31 is provided on the outer peripheral portion of the input shaft 2, air can be sent in the axial direction of the input shaft 2, so that the configuration of the blowing means can be simplified.

  In the present embodiment, the guide member 31 is formed so as to be inclined to the lower right with respect to the axial direction of the input shaft 2. However, as shown in FIG. You may form so that it may incline to the lower left with respect to the axial direction.

  In this way, the air taken in from the inner housing 14 can be sent to the air circulation hole 26 along the axial direction of the input shaft 2 as indicated by the arrow B, and can be exhausted from the air circulation hole 26. 12 can be cooled.

(Third embodiment)
8 and 9 are views showing a third embodiment of the cooling structure of the hydraulic clutch release mechanism according to the present invention. In the present embodiment, only the configuration of the air blowing means is different from that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
In FIG. 8, a plurality of blade members 41 are provided on the outer peripheral portion of the input shaft 2, and the blade members 41 allow the air taken in from the air circulation holes 26 to move toward the inner housing along the axial direction of the input shaft 2. 14 are respectively provided so as to be inclined to the lower right with respect to the axial direction of the input shaft 2 and spaced apart in the circumferential direction of the input shaft 2 so as to be fed into the openings 14. In the present embodiment, the blade member 41 constitutes a blowing means.

  In the present embodiment, a space 17 between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14 and the outside are provided at one end portion of the outer housing 15 attached to the transmission case 4 and the partition wall 5 of the clutch housing 3. An air circulation hole 26 is provided to allow air to flow between the input shaft 2 and air in the space 17 between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14 at the outer peripheral portion of the input shaft 2. The blade member 41 for feeding along the axial direction of the input shaft 2 is provided, and the blade member 41 is inclined to the lower right with respect to the axial direction of the input shaft 2 and separated in the circumferential direction of the input shaft 2. When the input shaft 2 rotates during operation, the air taken into the space 17 from the air circulation hole 26 is indicated by an arrow A. It can be discharged from the opening of the inner housing 14 by feeding along the axial direction of the input shaft 2 by the blade member 41.

  For this reason, when heat of lubricating oil for lubricating and cooling the transmission mechanism is transmitted from the transmission case 4 to the release mechanism 12 via the partition wall 5, the annular piston 18, the release bearing 20, and the outer side are transmitted via the inner housing 14. The housing 15 can be cooled, the durability of the release mechanism 12 can be improved, and the release mechanism 12 can be prevented from premature deterioration. Further, since the hydraulic oil supplied to the cylinder chamber 19 can be cooled, it is possible to prevent the hydraulic oil from becoming high temperature and to prevent the responsiveness of the release mechanism 12 from being deteriorated. Can do.

  In addition to this, air can be fed in the axial direction of the input shaft 2 by providing the blade member 41 on the outer peripheral portion of the input shaft 2, so that the configuration of the blowing means can be simplified.

  In the present embodiment, the blade member 41 is provided to be inclined to the lower right with respect to the axial direction of the input shaft 2 and spaced apart in the circumferential direction of the input shaft 2, but as shown in FIG. The blade member 42 may be provided to be inclined to the upper right with respect to the axial direction of the input shaft 2 and separated in the circumferential direction of the input shaft 2.

  In this way, the air taken in from the inner housing 14 can be sent to the air circulation hole 26 along the axial direction of the input shaft 2 as indicated by the arrow B, and can be exhausted from the air circulation hole 26. 12 can be cooled.

(Fourth embodiment)
FIG. 10 is a view showing a fourth embodiment of the cooling structure of the hydraulic clutch release mechanism according to the present invention. In the present embodiment, only the configuration of the air blowing means is different from that of the first embodiment, and the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
In FIG. 10, a screw portion 51 is formed on the inner peripheral portion of the inner housing 14, and the screw portion 51 allows the air taken in from the air circulation hole 26 to pass along the axial direction of the input shaft 2. Inclined to the lower right with respect to the axial direction of the input shaft 2. In the present embodiment, the screw part 51 constitutes a blowing means.

  In the present embodiment, a space 17 between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14 and the outside are provided at one end portion of the outer housing 15 attached to the transmission case 4 and the partition wall 5 of the clutch housing 3. An air circulation hole 26 is provided for circulating air between the inner housing 14 and air in the space 17 between the outer peripheral portion of the input shaft 2 and the inner peripheral portion of the inner housing 14. Since the screw part 51 to be fed along the axial direction of 2 is provided, and this screw part 51 is inclined to the lower right with respect to the axial direction of the input shaft 2, when the input shaft 2 rotates during driving of the vehicle, Due to the viscosity of the air taken into the space 17 from the air circulation hole 26, the air is moved in the axial direction of the input shaft 2 as shown by an arrow A. By feeding What can be discharged from the opening of the inner housing 14.

  For this reason, when heat of lubricating oil for lubricating and cooling the transmission mechanism is transmitted from the transmission case 4 to the release mechanism 12 via the partition wall 5, the annular piston 18, the release bearing 20, and the outer side are transmitted via the inner housing 14. The housing 15 can be cooled, the durability of the release mechanism 12 can be improved, and the release mechanism 12 can be prevented from premature deterioration. Further, since the hydraulic oil supplied to the cylinder chamber 19 can be cooled, it is possible to prevent the hydraulic oil from becoming high temperature and to prevent the responsiveness of the release mechanism 12 from being deteriorated. Can do.

  In addition, since the air can be fed in the axial direction of the input shaft 2 by forming the screw portion 51 on the inner peripheral portion of the inner housing 14, the structure of the blowing means can be simplified.

  In the present embodiment, the screw portion 51 is inclined downward and to the right with respect to the axial direction of the input shaft 2. However, the present invention is not limited to this, and the screw portion 51 is inclined with respect to the axial direction of the input shaft 2. You may make it incline to the lower left.

In this way, the air taken in from the inner housing 14 can be sent to the air circulation hole 26 along the axial direction of the input shaft 2 and can be exhausted from the air circulation hole 26, thereby cooling the release mechanism 12. it can.
In this embodiment, the inner housing 14 and the outer housing 15 are integrally formed. However, the inner housing 14 and the outer housing 15 are formed separately and the outer housing 15 is attached to the inner housing 14. May be.

  The embodiment disclosed this time is illustrative in all respects and is not limited to this embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

  As described above, the cooling structure of the hydraulic clutch release mechanism according to the present invention improves the durability of the hydraulic clutch release mechanism and prevents the hydraulic clutch release mechanism from deteriorating early. It has the effect of improving the responsiveness of the hydraulic clutch release mechanism and surrounds the input shaft of the transmission that protrudes into the clutch housing through the partition that partitions the clutch housing and the transmission case This is useful as a cooling structure for a hydraulic clutch release mechanism.

It is a figure which shows 1st Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is sectional drawing of the clutch mechanism provided with the hydraulic clutch release mechanism. It is a figure which shows 1st Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is sectional drawing of a hydraulic clutch release mechanism. It is a figure which shows 1st Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is an external view of a hydraulic clutch release mechanism. It is a figure which shows 1st Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a block diagram of a ventilation means. It is a figure which shows 1st Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a figure which shows the other structure of a ventilation means. It is a figure which shows 2nd Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a block diagram of a ventilation means. It is a figure which shows 2nd Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a figure which shows the other structure of a ventilation means. It is a figure which shows 3rd Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a block diagram of a ventilation means. It is a figure which shows 3rd Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a figure which shows the other structure of a ventilation means. It is a figure which shows 4th Embodiment of the cooling structure of the hydraulic clutch release mechanism which concerns on this invention, and is a block diagram of a ventilation means.

Explanation of symbols

2 Input shaft (input shaft)
3 Clutch housing 4 Transmission case 5 Bulkhead 9 Diaphragm spring (clutch mechanism)
10 Pressure plate (clutch mechanism)
11 Clutch disc (clutch mechanism)
DESCRIPTION OF SYMBOLS 12 Hydraulic clutch release mechanism 13 Hollow housing 17 Space 18 Annular piston 19 Cylinder chamber 20 Release bearing 26 Air flow hole 27, 30 Screw part (blower means)
31, 32 Guide member (air blowing means)
41, 42 Blade member (air blowing means)
51 Screw part (air blowing means)

Claims (7)

A hydraulic clutch release mechanism that operates a clutch mechanism that is housed in a crunch housing adjacent to a transmission case in which a transmission mechanism is housed via a partition wall and selectively transmits or cuts power from the internal combustion engine to the transmission mechanism. There,
A hollow housing that has one end attached to the partition wall and the other end opened to surround the input shaft of the speed change mechanism that protrudes into the clutch housing through the partition wall, and a cylinder provided in the hollow housing A cylinder, a ring piston slidably provided in the cylinder chamber and movable in the axial direction of the input shaft, and a release attached to the ring piston and movable in the axial direction of the input shaft together with the ring piston. With bearings,
In the hydraulic clutch release mechanism that supplies the hydraulic oil to the cylinder chamber to move the annular piston and the release bearing in the axial direction of the input shaft so that the clutch mechanism is disconnected.
The hollow housing is provided with an air circulation hole for allowing air to flow between the outer periphery of the input shaft and the inner periphery of the hollow housing and the outside, and the outer periphery of the input shaft or the hollow housing. A cooling structure for a hydraulic clutch release mechanism, characterized in that air blowing means for sending air in the space along the axial direction of the input shaft is provided on the inner periphery of the hydraulic clutch release mechanism. The air flow hole is provided at one end of the hollow housing, and the air blowing means feeds air that has flowed into the space from the air flow hole toward the opening of the hollow housing. The cooling structure of the hydraulic clutch release mechanism described. The air circulation hole is provided at one end of the hollow housing, and the air blowing means feeds air flowing into the space from the opening of the hollow housing toward the air circulation hole of the hollow housing. The cooling structure of the hydraulic clutch release mechanism according to Item 1. The air blowing means is formed of a screw portion that is formed on an outer peripheral portion of the input shaft and is inclined with respect to the axial direction of the input shaft so as to send air along the axial direction of the input shaft. The cooling structure of the hydraulic clutch release mechanism according to any one of claims 1 to 3. The blowing means is provided on an outer peripheral portion of the input shaft, and is composed of a spiral guide member that is inclined and continuous with respect to the axial direction of the input shaft so as to send air along the axial direction of the input shaft. The cooling structure for a hydraulic clutch release mechanism according to any one of claims 1 to 3, wherein: 4. The air blower according to claim 1, wherein the air blowing unit is configured of a blade member that is provided on an outer peripheral portion of the input shaft and feeds air along an axial direction of the input shaft. A cooling structure for a hydraulic clutch release mechanism according to claim. The air blowing means is configured by a screw portion formed on an inner peripheral portion of the hollow housing, and the screw portion is inclined with respect to the axial direction of the input shaft, whereby the input shaft is rotated with the rotation of the input shaft. The cooling structure for a hydraulic clutch release mechanism according to any one of claims 1 to 3, wherein the cooling structure is configured to feed air in an axial direction of the input shaft.

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