JP2006071038A - Lubricating device of manual transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating device of a manual transmission capable of supplying the optimum amount of oil to each lubricated part of the transmission in accordance with vehicle speed. <P>SOLUTION: In this lubricating device of the manual transmission provided with a gutter plate for supplying oil scraped up by a final driven gear to the lubricated parts of the transmission, the gutter plate has at least one hole for lubricating a gear of the transmission on a bottom face, and a plate having one-end opened square cross section is attached on the gutter plate rotatably in the direction of rotation of the final driven gear to block the hole for lubricating the gear in a normal condition. When a vehicle runs at low speed, oil is supplied into a lubricating hole in a main shaft of the transmission through the plate having one-end opened square cross section. When the vehicle runs at high speed, the plate having one-end opened square cross section is rotated by flow velocity pressure of oil scraped up by the final driven gear to expose the hole for lubricating the gear and supply oil to a tooth face of the gear through this hole. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention generally relates to a lubricating device for an automotive manual transmission, and more particularly to a lubricating device for an automotive manual transmission that supplies lubricating oil to a lubricated portion of the transmission through a gutter plate by gravity.

  The automatic transmission is equipped with a hydraulic clutch for shifting and an oil pump that supplies hydraulic oil to the hydraulic brake, and each lubricated part of the transmission is lubricated by using part of the hydraulic oil discharged from the oil pump as the lubricating oil. Is done.

  On the other hand, in a manual transmission that does not have a hydraulic control system, oil that has been lifted up by a final driven gear is generally supplied to a lubricated part with a bowl-shaped gutter plate and lubricated.

  The oil swept up by the final driven gear is received by the gutter plate, and the oil that flows out of the gutter plate by gravity is supplied to the bearing of the countershaft, and also the bearing of the main shaft through the hole for maintenance of the transmission case. And supplied into the shaft to lubricate these lubricated parts.

  Japanese Patent No. 2598299 discloses a conventional lubricating device for a manual transmission, in which the oil being scraped off by the oil scraper at the side of the final driven gear is scraped off by an oil scraper during ultra-low speed running. Has been.

  Japanese Utility Model Publication No. 63-15642 is provided with a flow control valve that opens and closes at a temperature in an oil reservoir, and the control valve is closed to reduce oil agitation resistance at low temperatures, and is opened at high temperatures. A gear transmission lubrication mechanism is disclosed.

Further, Japanese Patent Laid-Open No. 2001-254811 discloses a lubrication mechanism for a transmission characterized in that a movable wall of an oil passage entrance is rotated via a ball in accordance with acceleration G during vehicle travel. Yes.
Japanese Patent No. 2598299 Japanese Utility Model Publication No. 63-15642 JP 2001-254811 A

  The lubricating device for a vehicle transmission described in the cited document 1 is limited to use in an ultra-low speed gear stage, and does not function in low-speed traveling such as first gear or second gear. In addition, the scraper attached to the shift piece is expensive and has a large number of parts.

  The lubrication mechanism of the gear transmission described in Patent Document 2 includes a flow control valve that opens and closes depending on temperature. This flow control valve is made of bimetal, thermowax, or the like, and is expensive. It seems difficult to attach to.

  In the lubrication mechanism of the transmission described in Patent Document 3, there is a problem that switching according to the flow rate is difficult because the movable wall at the oil passage entrance is rotated in accordance with the acceleration G during vehicle travel.

  The present invention has been made in view of the above points, and an object thereof is to provide a lubricating device for a manual transmission capable of supplying an optimum amount of oil to each lubricated portion of the transmission according to the vehicle speed. Is to provide.

  According to the first aspect of the present invention, in the lubricating device for a manual transmission provided with a gutter plate for supplying the oil driven by the final driven gear to the lubricated portion of the transmission, the gutter plate is at least one for lubricating the gear of the transmission. It has a hole in the bottom, and a U-shaped cross-sectional plate is provided on the gutter plate so as to be able to rotate in the rotational direction of the final driven gear so as to close the gear lubrication hole in a normal state. The oil is supplied to the in-shaft lubrication hole of the main shaft of the transmission through the U-shaped plate of the cross section, and at the time of high speed traveling, the flow velocity pressure of the oil swept up by the final driven gear causes the U-shaped cross section of the cross section to The plate rotates to expose the gear lubrication hole. Lubrication system for a manual transmission, characterized by supplying oil is provided to the tooth surface of the gear through the hole.

  According to the second aspect of the present invention, the U-shaped plate is urged in the direction opposite to the rotation direction of the final driven gear by the rotation urging mechanism and pressed against the bottom surface of the gutter plate, A manual transmission lubrication device is provided in which a plate having a U-shaped cross section is rotated by overcoming the urging force of the rotation urging mechanism by the pressure caused by the flow velocity of the rotation.

  According to a third aspect of the present invention, there is provided a manual transmission lubrication device, wherein the gutter plate has at least one notch for gear lubrication of the transmission on a side surface far from the final driven gear. .

  According to the first aspect of the present invention, since the oil driven by the final driven gear is low when traveling at a low speed, the oil driven to the side of the final driven gear is scraped off by the U-shaped plate, and the main shaft is Oil can be supplied to the in-shaft lubrication hole, and oil can be actively supplied and lubricated to a high-load bearing during low-speed driving.

  When driving at high speeds, it is necessary to lubricate the gear tooth surface as much as possible to prevent damage to the tooth surface of the high gear, but the U-shaped plate is removed by the fast oil pressure that is swept up by the final driven gear. The oil can be positively supplied to the gear tooth surface through the gear lubrication hole which has been rotated and closed by the U-shaped plate.

  In addition, by optimizing the shape of the gutter plate and the shape of the hole for gear lubrication, it is possible to store oil on the gutter plate, and the oil that accumulates at the bottom of the transmission case is reduced. It is possible to suppress an increase in resistance or oil temperature due to oil agitation.

  According to the lubrication apparatus of claim 2, the oil viscosity is high and there is a risk of rotating the U-shaped plate at an extremely low temperature. However, the rotation biasing mechanism uses a spring set load in consideration of the oil flow velocity and viscous resistance. By doing so, it becomes possible to rotate the U-shaped plate at the set vehicle speed and switch the lubricating oil path.

  According to the lubrication apparatus of the third aspect, the oil swept up on the gutter plate can be supplied to the gear through the notch during the low speed traveling and the high speed traveling so that the gear can be lubricated.

  Referring to FIG. 1, there is shown a longitudinal sectional view of a manual transmission employing the lubricating device of the present invention. FIG. 2 is a side view of the manual transmission shown in FIG. 1 with the transmission case removed.

  Referring mainly to FIG. 1, the transmission case 10 and the clutch case 11 are integrally fastened by bolts (not shown). A main shaft (input shaft) 12 and a counter shaft (output shaft) 14 are rotatably supported by the transmission case 10, and both ends of the reverse shaft 16 are fixedly supported. The main shaft 12, the counter shaft 14, and the reverse shaft 16 are arranged in parallel to each other.

  Reference numeral 18 denotes a clutch. A flywheel 22 of the clutch 18 is connected to an engine crankshaft 20 by a bolt 24. The clutch cover 26 is fixed to the flywheel 22 by bolts 28. A pressure plate 30 is attached to the clutch cover 26 so as to be movable in the axial direction by a rivet (not shown).

  A diaphragm spring 32 is attached to the clutch cover 26, and its outer peripheral end is biased so as to press the pressure plate 30. A clutch disk 34 is sandwiched between the flywheel 22 and the pressure plate 30.

  In the illustrated clutch-on state, the pressure plate 30 is firmly pressed against the facing of the clutch disk 34 by the urging force of the diaphragm spring 32, and the rotation of the flywheel 22 is directly transmitted to the main shaft 12 via the clutch disk 34.

  The release bearing 36 is attached so as to be slidable in the axial direction. When the clutch pedal is depressed, the release hawk 38 slides the release bearing 36 in the right direction in FIG. As a result, the urging force of the diaphragm spring 32 is released, the clutch is turned off, and transmission of the rotational force of the crankshaft 20 to the main shaft 12 via the clutch 18 is interrupted.

  A first speed drive gear 40 and a second speed drive 42 are fixed to the main shaft 12, and a third speed drive gear 44, a fourth speed drive gear 46, and a fifth speed drive gear 48 are supported so as to be relatively rotatable.

  On the other hand, the counter shaft 14 supports a first-speed driven gear 52 and a second-speed driven gear 54 that mesh with the first-speed drive gear 40 and the second-speed drive gear 42, respectively, and supports the third-speed drive gear 44, A third speed driven gear 56, a fourth speed driven gear 58, and a fifth speed driven gear 60 that mesh with the drive gear 46 and the fifth speed drive gear 48, respectively, are fixed.

  Switching between the respective gears is performed by three synchromesh mechanisms 64, 66 and 68. The first synchromesh mechanism 64 is provided on the counter shaft 14 between the first speed driven gear 52 and the second speed driven gear 54.

  The second synchromesh mechanism 66 is provided on the main shaft 12 between the third speed drive gear 44 and the fourth speed drive gear 46. The third synchromesh mechanism 68 is provided on the main shaft 12 adjacent to the fifth speed drive gear 48.

  Except at the time of a shift change, the power of the main shaft 12 is transmitted to the countershaft 14 through the transmission gear stage selected by the operation of the synchromesh mechanisms 64, 66 and 68.

  Then, after being decelerated by the final reduction gear train of the final reduction gear train including the final drive gear 70 and the final driven gear 72, it is transmitted to the differential device 74. As a result, the left and right drive wheels rotate in the forward direction via the left and right axles 76 and 78.

  On the other hand, at the time of retreat, first, all the synchromesh mechanisms 64 to 68 are set to the neutral state. The reverse drive gear 80 fixedly attached to the main shaft 12 and the reverse driven gear 82 attached to the outer periphery of the synchromesh mechanism 64 so as not to rotate relative to each other are not directly meshed with each other, but are arranged in a line. .

  In this state, the reverse idler gear 84 that is rotatably and slidably mounted on the reverse shaft 16 slides on the reverse shaft 16 in the axial direction and meshes with both the reverse drive gear 80 and the reverse driven gear 82.

  Thereby, the power of the main shaft 12 is transmitted to the counter shaft 14 via the reverse drive gear 80, the reverse idler gear 84, and the reverse driven gear 82.

  At the time of reverse, since power is transmitted to the countershaft 14 via the reverse idler gear 84, the rotation direction of the countershaft 14 is opposite to that at the time of forward movement, and the drive wheels rotate in the reverse direction.

  In FIG. 1, the reverse shaft 16 and the reverse idler gear 84 are illustrated above the reverse drive gear 80 and the reverse driven gear 82 in order to clarify the structures of the reverse shaft 16 and the reverse idler gear 84. Note that is in a position where it can mesh with both the reverse drive gear 80 and the reverse driven gear 82.

  Reference numeral 86 denotes a gutter plate, which is disposed in the upper space of the transmission, receives the oil scooped up by the final driven gear 72 on the upstream side, and flows it to the downstream side by gravity, so that the lubricated portion of the main shaft 12 and the counter shaft 14 are covered. It is used to supply oil to the lubrication part and lubricate them.

  With reference to FIG.3 and FIG.4, the detailed structure of the lubricating device of embodiment of this invention is demonstrated. FIG. 3 is a plan view of the lubricating device according to the embodiment of the present invention, and FIG. 4 is a front view thereof. Three holes 88 for gear tooth surface lubrication are formed on the bottom surface of the gutter plate 86 at positions corresponding to the third speed driven gear 56, the fourth speed driven gear 58 and the fifth speed driven gear 60.

  Further, three notches 90 for gear lubrication are formed on the side surface of the gutter plate 86 far from the final driven gear 72 in correspondence with the third to fifth speed driven gears 56, 58 and 60.

  Reference numeral 92 denotes a U-shaped plate (hereinafter abbreviated as a U-shaped plate), which can be rotated by the rotating mechanism 93 and the rotating biasing mechanism 94 in the rotational direction of the final driven gear 72 (can be tilted). It is installed on the plate 86.

  In a normal state, the U-shaped plate 92 is urged in the direction opposite to the rotation direction of the final driven gear 72 by the urging force of the rotation urging mechanism 94 and is pressed against the bottom surface of the gutter plate 86 to close the hole 88. Yes.

  The rotation mechanism 93 includes a pair of support portions 100 fixed to the gutter plate 86 and a pin integrated connection portion 104 connected to the U-shaped plate 92 and rotatably attached to the support portion 100.

  The rotation urging mechanism 94 is similar to the rotation mechanism 93, and is integrated with a pair of support portions 100 fixed to the gutter plate 86 and a U-shaped plate 92, and a pin integrally inserted into the support portion 100 in a rotatable manner. The connecting portion 104 and a coil spring 106 that urges the U-shaped plate 92 in a direction opposite to the rotation direction of the final driven gear 72 and presses it against the bottom surface of the gutter plate 86.

  As apparent from FIGS. 3 and 4, the U-shaped plate 92 is disposed very close to the side surface of the final driven gear 72, and the oil that has been brought to the side surface of the final driven gear 72 is transferred to the U-shaped plate 92. The oil can be scraped off on the side surface and scraped off into the U-shaped plate 92.

  When traveling at low speed, since the flow velocity pressure of the oil swept up by the final driven gear 72 rotating in the direction of the arrow 96 is low, the U-shaped plate 92 is moved by the urging force of the coil spring 106 as shown in FIGS. When pressed against the bottom surface of the plate 86, the lubricating hole 88 is closed by a U-shaped plate 92.

  Therefore, most of the oil scooped up by the final driven gear 72 is received by the U-shaped plate 92 and then flows downstream through the U-shaped plate 92 as indicated by an arrow 98, and the shaft of the main shaft 12 of the transmission Lubricating oil is supplied to the inner lubricating hole and the bearing.

  Further, the oil that jumps over the U-shaped plate 92 and is received by the gutter plate 86 is used to lubricate the 3rd to 5th driven gears 56, 58, and 60 through the notch 90. In order to lubricate the driven gears 52 and 54 for the first speed and the second speed, similar notches may be provided at positions corresponding to the first and second speed driven gears 52 and 54.

  During high speed travel, the final driven gear 72 is rotated at a high speed, and the pressure due to the flow rate of the oil swept up by the final driven gear 72 increases. As a result, the flow velocity pressure of the oil overcomes the urging force of the coil spring 106 to rotate the U-shaped plate 92 (tilt) as shown in FIG. 6, and for gear lubrication formed on the bottom surface of the gutter plate 86. The hole 88 is exposed.

  Therefore, a part of the oil that has been lifted is supplied to the tooth surfaces of the driven gears 56, 58, and 60 for the third to fifth speeds through the holes 88 and the other part through the notches 90, and these are lubricated. To do. Thereby, the tooth surface damage of a high gear stage gear can be prevented. The remainder of the oil that has been scraped flows down the gutter plate 86 to the downstream side, and is supplied to the in-shaft lubrication hole of the main shaft 12.

  At extremely low temperatures, the viscosity of the oil is high, and there is a risk that the U-shaped plate 92 will rotate due to the swirled oil, but the coil spring 106 should be set to an optimal spring constant considering the oil flow rate and viscous resistance. Thus, the lubricating oil path can be switched at a preset vehicle speed.

  In addition, by optimizing the shape of the gutter plate 86 and the shape of the hole 88 for gear lubrication, it is possible to store the oil that has been lifted up on the gutter plate 86, and the oil that accumulates at the bottom of the transmission case. Therefore, it is possible to suppress resistance due to oil agitation during high-speed traveling or an increase in the temperature of the oil pump.

  Furthermore, since the final driven gear rotates in the reverse direction during reverse travel, the required amount of oil may not be lifted onto the gutter plate 86 in some cases. By setting the position of the U-shaped plate 92, it is possible to reliably supply oil into the main shaft even during reverse traveling with high load.

  As described in detail above, the lubrication apparatus of the present invention can provide optimum lubrication to the tooth surfaces of the bearings and gears by providing an oil passage that is switched depending on the vehicle speed without being influenced by the acceleration or inclination of the vehicle. No control valve or complicated link mechanism is required, oil deterioration due to stirring is small, the amount of oil is reduced, and the lubricated part of the manual transmission can be reliably lubricated at low cost.

It is a longitudinal cross-sectional view of the manual transmission provided with the lubricating device of this invention. FIG. 2 is a side view of the manual transmission shown in FIG. 1 with a transmission case removed. It is a top view of the lubricating device of the embodiment of the present invention. It is a front view of the lubricating device shown in FIG. It is a figure explaining the effect | action at the time of low speed driving | running | working. It is a figure explaining the effect | action at the time of high speed driving | running | working.

Explanation of symbols

12 Main shaft 14 Counter shaft 18 Clutch 52 1st driven gear 54 2nd driven gear 56 3rd driven gear 58 4th driven gear 60 5th driven gear 72 Final driven gear 86 Gutter plate 88 Gear lubrication hole 90 Notch 92 U-shaped plate

Claims (3)

In a manual transmission lubrication device equipped with a gutter plate that supplies the oil driven by the final driven gear to the transmission lubricated part,
The gutter plate has at least one hole in the bottom for gear transmission lubrication,
A plate having a U-shaped cross section is provided on the gutter plate so as to be able to rotate in the rotational direction of the final driven gear so as to close the gear lubrication hole in a normal state.
During low-speed running, oil is supplied to the lubrication hole in the shaft of the main shaft of the transmission through the U-shaped plate in the cross section,
When traveling at high speed, the U-shaped plate is rotated by the flow velocity pressure of the oil swept up by the final driven gear to expose the gear lubrication hole, through which the gear tooth surface is exposed. Lubricating device for manual transmission characterized by supplying oil. The U-shaped plate in section is urged by the rotation urging mechanism in the direction opposite to the rotation direction of the final driven gear and pressed against the bottom surface of the gutter plate,
2. The lubricating device for a manual transmission according to claim 1, wherein the U-shaped cross-sectional plate rotates when pressure due to the flow speed of the oil that has been swept up overcomes the urging force of the rotation urging mechanism.   3. The manual transmission lubrication device according to claim 1, wherein the gutter plate has at least one notch for gear lubrication of the transmission on a side surface far from the final driven gear.

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