JP2007139070A - Transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission capable of surely lubricating a connecting surface between a shift fork and coupling sleeve by minimizing a necessary amount of the lubricant. <P>SOLUTION: In the transmission for changing gears by shifting the coupling sleeve connected with the shift fork from a neutral position not connected with a shift gear to a shifting position connected with the shift gear by means of the shift fork, the transmission comprises a lubricant flowing means for flowing the lubricant to the connecting surface P between the shift fork and coupling sleeve at either of the neutral and shifting positions, and left and right guide rings 10 and 11 capable of guiding the lubricant flowing from a through-hole at either of the neutral and shifting positions to the connecting surface P at either of the neutral and shifting positions. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a transmission.

Conventionally, this type of transmission has been proposed in which lubricating oil discharged by an oil pump is supplied to an engagement surface between a shift fork and a coupling sleeve using an oil supply conduit.
In this transmission, the lubricating oil supply opening is formed in any of the positions corresponding to the case where the coupling sleeve is in the neutral position and the position in the speed change position in the oil supply line, thereby providing a coupling. Even when the sleeve is located at either the neutral position or the shift position, the lubricating oil can be supplied to the engagement surface between the shift fork and the coupling sleeve.
Japanese Utility Model Publication No. 1-100957

  However, in the transmission as described above, the lubricating oil is always supplied to a position where the coupling sleeve does not exist, and there is a problem in that the lubricating oil flows out wastefully. That is, for example, even when the coupling sleeve is in the neutral position, the lubricating oil always flows out from the opening formed at the position corresponding to the case where the coupling sleeve in the oil supply line is in the speed change position. Will be.

  The present invention has been devised in view of the above-described conventional problems, and aims to supply lubricating oil to the engagement surface between the shift fork and the coupling sleeve while minimizing the amount of lubricating oil. The present invention provides a transmission capable of easily ensuring the lubrication of the engaging surface between the shift fork and the coupling sleeve, and claim 1 includes a coupling sleeve engaged with the shift fork. A transmission that shifts from a neutral position that is not engaged with the transmission gear by the shift fork to a transmission position that is engaged with the transmission gear, the shift fork at either the neutral position or the transmission position Lubricating oil outflow means for outflowing the lubricating oil toward the engagement surface between the coupling sleeve and the coupling sleeve, and the fluid flowing out at either the neutral position or the shift position Namerayu is to a and a guide means capable of inducing in said mating surface of one of the shift position or the neutral position.

  According to a second aspect of the present invention, the lubricating oil outlet means includes an oil supply conduit as a flow passage for the lubricating oil, a through-hole as an outlet for the lubricant formed in the oil supply conduit, and the oil supply conduit. And a feeding means for feeding the lubricating oil.

  A third aspect of the present invention is that the guide means is disposed on the coupling sleeve.

  According to a fourth aspect of the present invention, the guide means includes a protruding portion that protrudes with an inclined surface inclined toward the through hole from a side portion of the engagement surface of the coupling sleeve.

  According to a fifth aspect of the present invention, the projecting portion is a ring member fixedly disposed on the side portion.

  According to a sixth aspect of the present invention, the ring member is fixedly disposed on the side portion with a rotation stop means.

  A seventh aspect of the transmission is the transmission according to any one of the fourth to sixth aspects, wherein the transmission position includes a first transmission position and the second transmission position that sandwich the neutral position. Is formed at a position corresponding to the neutral position of the oil supply pipe line, and the protrusion includes a first protrusion capable of guiding the lubricating oil to the engagement surface at the first shift position, and the second Second protrusions capable of guiding the lubricating oil to the engagement surface at the shift position are provided at both ends of the engagement surface of the coupling sleeve.

  The present invention is a transmission that shifts a coupling sleeve that is engaged with a shift fork from a neutral position that is not engaged with a transmission gear by the shift fork to a transmission position that is engaged with the transmission gear. Lubricating oil outflow means for flowing out lubricating oil toward the engagement surface between the shift fork and the coupling sleeve at either the neutral position or the shift position; and at either the neutral position or the shift position When the coupling sleeve is shifted to either the neutral position or the shift position by providing the guiding means capable of guiding the lubricant flowing out to the engagement surface in either the shift position or the neutral position Even if the lubricating oil spilled in either the neutral position or the shift position engages the shift fork and the coupling sleeve Since it is possible to induce in, it becomes never allowed to flow out waste lubricating oil as compared to those resulting in the outflow of the lubricating oil at each position of the neutral position and the shift position.

  The lubricating oil outflow means includes an oil supply conduit as a flow path of the lubricant, a through-hole as an outlet of the lubricant formed in the oil supply conduit, and the lubricating oil in the oil supply conduit. Therefore, the lubricating oil can flow out toward the engagement surface between the shift fork and the coupling sleeve with a simple configuration.

  In addition, the guide means includes a protruding portion that protrudes with an inclined surface that is inclined from the side portion of the coupling surface of the coupling sleeve toward the through hole, so that the coupling sleeve is in the shift position or the neutral position. Even when shifted, the lubricating oil flowing out at the neutral position or the shift position can be received by the protruding portion, and the received lubricating oil can be supplied to the engaging surface by the inclined surface. Lubrication of the engagement surface can be easily ensured.

  In addition, since the protruding portion is a ring member fixedly disposed on the side portion, the ring member is only fixedly disposed on the side portion, so that the engagement surface between the shift fork and the coupling sleeve is lubricated. It can be secured more easily.

  Further, since the ring member is fixedly disposed on the side portion with a rotation stop means, it is possible to prevent the ring member from rotating relative to the coupling sleeve. Can be prevented from being removed.

  The transmission according to any one of claims 4 to 6, further comprising a first shift position and the second shift position that sandwich the neutral position as the shift position. The protrusion is formed at a position corresponding to the neutral position of the pipeline, and the protrusion includes a first protrusion that can guide the lubricating oil to the engagement surface at the first shift position, and the protrusion at the second shift position. When the coupling sleeve is shifted to the neutral position by providing the second protrusions capable of guiding the lubricating oil to the engaging surface at both ends of the engaging surface of the coupling sleeve, respectively. Supplies the lubricating oil flowing out from the through hole to the engaging surface, and when the coupling sleeve is shifted to the first speed change position, the lubricating oil flowing out from the through hole is received by the first protrusion and engaged. Supply to the surface If the coupling sleeve is shifted to the second shift position can be supplied to the engagement surface lubricating oil flowing out of the through hole receiving the second protrusion.

Hereinafter, a transmission 1 will be described with reference to the drawings as a first embodiment of the present invention.
FIG. 1 is a schematic configuration diagram showing an outline of a configuration of a transmission 1 according to a first embodiment of the present invention. As shown in the figure, the transmission 1 according to the embodiment includes an input shaft 2 connected to the clutch C and supported by the transmission case 1a via a bearing B1, and a bearing B2 on the transmission case 1a. A counter shaft 5 supported by the rotating brain via B3 and arranged in parallel to the input shaft 2, and one end of the counter shaft 5 rotatably fitted to the input shaft 2 via a bearing B4 and the other end of the transmission case An output shaft 6 rotatably supported by a bearing B5 on 1a, and a gear that decelerates the rotation of the input shaft 2 and transmits it to the counter shaft 5 and shifts the rotation of the counter shaft 5 to transmit it to the output shaft 6. A mechanism T and a lubricating device L that supplies lubricating oil to the gear mechanism T are provided.

  The gear mechanism T includes a driving gear G, a driven gear G ′, and a synchronization device S. The drive gear G is a 5-speed drive gear 35 that also functions as a reduction gear fixedly disposed at the rear end of the input shaft 2, a 6-speed drive gear 66 fixedly disposed on the counter shaft 5, and 2-speed drive gears 62, 1. The drive gear G includes a speed drive gear 61, a reverse drive gear 67, and a third speed drive gear 63 and a fourth speed drive gear 64 arranged so as to be free to rotate on the counter shaft 5. Are arranged in the order of the 6th speed drive gear 66, the 2nd speed drive gear 62, the 1st speed drive gear 61, the 3rd speed drive gear 63, the 4th speed drive gear 64, and the reverse drive gear 67 from the clutch C side.

  The driven gear G ′ includes a fifth-speed driven gear 65 fixedly disposed on the counter shaft 5, a sixth-speed driven gear 36 disposed on the output shaft 6 so as to be freely rotatable, the second-speed driven gear 32, and the first-speed gear. The driven gear 31 is composed of a driven gear 31, a reverse driven gear 37, a third speed driven gear 33 fixedly disposed on the output shaft 6, and a fourth speed driven gear 34. The driven gear G disposed on the output shaft 6. 'Is arranged in the order corresponding to the drive gear G so as to mesh with the drive gear G.

  The synchronizer S includes an axial direction of the reverse driven gear 37 between the fifth speed driven gear 35 and the sixth speed driven gear 36 of the output shaft 6, between the first speed driven gear 31 and the second speed driven gear 32. A fifth and sixth speed synchronizer 41, a first and second speed synchronizer 42, a reverse synchronizer 43, a third speed driven gear 63 and a fourth speed driven gear 64 of the counter shaft 5, which are respectively arranged on the rear side; The third and fourth speed synchronizers 44 are arranged between each of them, and each synchronizer 41, 42, 43, 44 is fixedly supported on each shaft (output shaft 6 or counter shaft 5). The synchro hubs 41a, 42a, 43a, 44a and the coupling sleeves 41b, 42b, 43b, 44b arranged to be slidable on the outer periphery of the synchro hubs 41a, 42a, 43a, 44a are provided.

  Shift forks 71, 72, 73, 74 are engaged with the coupling sleeves 41b, 42b, 43b, 44b, respectively, and the coupling sleeves 41b, 42b, 43b, 44b is moved in the axial direction to shift to a shift position that engages with the drive gear G or the driven gear G ′ or a neutral position that does not engage with either the drive gear G or the driven gear G ′. . Hereinafter, the synchro hubs 41a, 42a, 43a, and 44a are collectively referred to as the synchro hub Sa, the coupling sleeves 41b, 42b, 43b, and 44b are collectively referred to as the coupling sleeve Sb, and the shift forks 71, 72, 73, and 74 are collectively referred to. This is called shift fork F.

FIG. 2 is a front configuration diagram illustrating an example of the configuration of the coupling sleeve Sb as viewed from the front, and FIG. 3 is a side configuration diagram of FIG. 2.
As shown in the figure, ring members 10 and 11 are provided in a protruding shape on both wall portions Sb1 and Sb2 that form the engagement surface P with which the shift fork F of the coupling sleeve Sb is engaged. , 11 include a plurality of detent portions 10a, 11a for preventing relative rotation with respect to the coupling sleeve Sb, and inclined surfaces 10b, 11b that are inclined radially outward from both wall portions Sb1, Sb2. Is formed. The anti-rotation portions 10a and 11a are formed in a trapezoidal shape that becomes wider toward the inside in the radial direction, and exhibit a wedge effect by being fitted into the corresponding groove portions formed in the both wall portions Sb1 and Sb2. The ring members 10 and 11 can be firmly fixed to the coupling sleeve Sb. Since the coupling sleeve 43b for the reverse shift moves only in one axial direction, one of the wall portions Sb1 and Sb2, that is, the wall opposite to the moving direction of the coupling sleeve 43b. The ring member 11 is provided only in the part Sb2.

  The lubricating device L includes a known oil pump 9 that sucks and discharges lubricating oil in an oil pan (not shown), and an oil supply line 8 as a flow path of the lubricating oil discharged by the oil pump 9. A through hole 8a serving as a lubricant outlet is formed in the oil supply pipe 8 at a position corresponding to a position almost directly above the engagement surface P when each coupling sleeve Sb is in the neutral position. The lubricating oil can be supplied to the engagement surface P between the ring sleeve Sb and the shift fork F.

  Next, the movement of the lubricating oil supplied to the engagement surface P between the coupling sleeve Sb and the shift fork F in accordance with the operation of the transmission 1 of the first embodiment configured as described above will be described. For the sake of simplification, the case where the lubricating oil is supplied to the engagement surface P between the coupling sleeve 42 b and the shift fork 72 of the first and second speed synchronizer 42 will be described as an example.

  FIG. 4 is a state diagram showing a state in which lubricating oil is supplied to the engagement surface P between the coupling sleeve 42 b and the shift fork 72. When the coupling sleeve 42b is in the neutral state, the lubricating oil that has flowed out of the through hole 8a is supplied from almost right above the engagement surface P, as shown in FIG. Next, when the coupling sleeve 42b is shifted to the first speed side, as shown in FIG. 4 (b), the coupling sleeve 42b is axially moved to the right side in the drawing, and the engagement surface P is moved to the through hole 8a. However, since the through hole 8a is positioned almost directly above the center of the inclined surface 10b of the ring member 10, the lubricating oil flowing out of the through hole 8a is received by the inclined surface 10b and inclined. It is supplied to the engagement surface P along the surface 10b. Similarly, when the coupling sleeve 42b is shifted to the 2nd speed side, as shown in FIG. 4 (c), the coupling sleeve 42b is axially moved to the left side in the drawing, and the engagement surface P is moved to the through hole 8a. However, since the through hole 8a is located almost directly above the center of the inclined surface 11b of the ring member 11, the lubricating oil that has flowed out of the through hole 8a is received by the inclined surface 11b and inclined. It is supplied to the engagement surface P along the surface 11b. Needless to say, the coupling sleeve Sb other than the coupling sleeve 42b, that is, the coupling sleeves 41b, 43b, and 44b, also exhibits these effects.

  According to the transmission 1 of the first embodiment described above, the through hole 8a is provided in the oil supply pipe line 8 at a position corresponding to substantially directly above the engagement surface P when each coupling sleeve Sb is in the neutral position. And the ring members 10 and 11 having the inclined surfaces 10b and 11b are provided on the both wall portions Sb1 and Sb2 of the coupling sleeve Sb, so that when the coupling sleeve Sb is in the neutral position, the coupling sleeve Sb and When the lubricating oil can be supplied from almost right above the engagement surface P with the shift fork F and the coupling sleeve Sb is shifted to the speed change position, the slanting surfaces 10b and 11b of the ring members 10 and 11 receive the engagement member. Lubricating oil can be supplied to the mating surface P. That is, the oil supply pipe 8 is in the neutral position only by providing the through-holes 8a at each one of the positions corresponding to substantially directly above the engagement surface P when each coupling sleeve Sb is in the neutral position. Lubricating oil can be supplied to the engagement surfaces P of the coupling sleeves Sb and the shift forks F and the engagement surfaces P of the coupling sleeves Sb and the shift forks F shifted to the shift position. . As a result, it is possible to prevent wasteful lubricating oil from flowing out as compared with the case where the through hole 8a is provided at the position of the oil supply pipe line 8 corresponding to the neutral position and the shift position of each coupling sleeve Sb. The amount can be minimized. Further, since only the ring members 10 and 11 are provided on the both wall portions Sb1 and Sb2 of the coupling sleeve Sb, the lubrication of the engagement surface P can be easily ensured.

  Next, a transmission 1A as a second embodiment of the present invention will be described. The transmission 1A of the second embodiment has the same configuration as the transmission 1 of the first embodiment, except that the formation position of the through hole 8a and the ring members 10 and 11 are changed to the ring member 100. For this reason, the illustration and detailed description of the configuration of the transmission 1A of the second embodiment are omitted to avoid duplication.

FIG. 5 is a front configuration diagram of an example of the configuration of the coupling sleeve Sb in the transmission 1A of the second embodiment as viewed from the front, and FIG. 6 is a side configuration diagram of FIG.
As shown in the drawing, a wall member Sb2 of both wall portions Sb1 and Sb2 forming an engagement surface P with which the shift fork F of the coupling sleeve Sb is engaged is provided with a ring member 100 in a protruding shape. The ring member 100 is formed with a plurality of detent portions 100a for preventing relative rotation with respect to the coupling sleeve Sb, and an inclined surface 100b that is inclined radially outward from the wall portion Sb2.

  The inclined surface 100b is formed to have a length substantially equal to the combined length of the inclined surfaces 10b and 11b of the ring members 10 and 11 provided on the coupling sleeve Sb in the transmission 1 of the first embodiment. The anti-rotation portion 100a is formed in a trapezoidal shape that becomes wider toward the inside in the radial direction, and is fitted into a corresponding groove portion formed in the wall portion Sb2, thereby exhibiting a wedge effect and cupping the ring member 100. It is configured to be able to be firmly fixed to the ring sleeve Sb. In addition, a through-hole 8a is formed in the oil supply pipe 8 at a position corresponding to a position almost directly above the root tip near the wall Sb2 of the inclined surface 100b when the coupling sleeve Sb is in the neutral position.

  Next, the movement of the lubricating oil supplied to the engagement surface P between the coupling sleeve Sb and the shift fork F in accordance with the operation of the transmission 1A of the second embodiment configured as described above will be described. For the sake of simplification, the case where the lubricating oil is supplied to the engagement surface P between the coupling sleeve 42 b and the shift fork 72 of the first and second speed synchronizer 42 will be described as an example.

FIG. 7 is a state diagram showing a state in which lubricating oil is supplied to the engagement surface P between the coupling sleeve 42 b and the shift fork 72.
When the coupling sleeve 42b is in the neutral state, as shown in FIG. 7 (a), the lubricating oil that has flowed out of the through hole 8a is supplied from almost right above the root tip near the wall Sb2 of the inclined surface 100b. Therefore, it is received by the inclined surface 100b and supplied to the engaging surface P along the inclined surface 100b.
Next, when the coupling sleeve 42b is shifted to the first speed side, as shown in FIG. 7 (b), the coupling sleeve 42b is axially moved to the right side in the drawing, and the engagement surface P is moved to the through hole 8a. The lubricating oil flowing out of the through-hole 8a is supplied almost directly above the engagement surface P.
When the coupling sleeve 42b is shifted to the 2nd speed side, as shown in FIG. 7C, the coupling sleeve 42b is axially moved to the left in the figure, and the lubricating oil flowing out from the through hole 8a is inclined. Since it is supplied from almost right above the protruding tip of the surface 100b, it is received by the inclined surface 100b and supplied to the engaging surface P along the inclined surface 100b.
Needless to say, the coupling sleeve Sb other than the coupling sleeve 42b, that is, the coupling sleeves 41b, 43b, and 44b, also exhibits these effects.

  Also in the transmission 1A of the second embodiment described above, each coupling pipe 8 is provided with a through hole 8a at one location corresponding to each coupling sleeve Sb in the oil supply pipe 8 so that each coupling in the neutral position is provided. Lubricating oil can be supplied to the engagement surface P between the sleeve Sb and each shift fork F and the engagement surface P between each coupling sleeve Sb and each shift fork F shifted to the shift position. As a result, it is possible to prevent wasteful lubricating oil from flowing out as compared with the case where the through hole 8a is provided at the position of the oil supply pipe line 8 corresponding to the neutral position and the shift position of each coupling sleeve Sb. The amount can be minimized. Further, since only one ring member 100 is provided on the wall portion Sb2 of the coupling sleeve Sb, it is possible to easily ensure lubrication of the engagement surface P while suppressing the number of parts.

  In the transmission 1A of the second embodiment, the ring member 100 is provided on the wall portion Sb2 of the coupling sleeve Sb, but may be provided on the wall portion Sb1 of the coupling sleeve Sb.

  In the transmissions 1 and 1A of the first and second embodiments, the ring members 10, 11, and 100 are formed separately from the coupling sleeve Sb, but the ring members 10, 11, and 100 are coupled to the coupling sleeve. It may be formed integrally with Sb.

  In the transmissions 1 and 1A according to the first and second embodiments, the ring members 10, 11, 100 are formed with a plurality of detents 10 a, 11 a, 100 a, but the detents 10 a, 11 a, 100 a There may be only one place, or it may be omitted.

Next, a transmission 1B as a third embodiment of the present invention will be described.
The transmission 1B of the third embodiment is similar to the transmission of the first embodiment except that the ring members 10, 11, 100 provided on the coupling sleeve Sb are changed to the guide receiving members 12 provided on the shift fork F. 1 has the same configuration. For this reason, illustration and detailed description of the configuration of the transmission 1B of the third embodiment are omitted to avoid duplication.

FIG. 8 is a side configuration diagram showing an example of the configuration of the shift fork F in the transmission 1B of the third embodiment as viewed from the side.
As shown in the figure, a substantially dish-shaped guide receiving member 12 capable of receiving lubricating oil is fixed to the upper portion of the shift fork F by welding or the like, and the inner surface corresponding to the axial direction of the guide receiving member 12 is The inclined surfaces 12a and 12b are formed so as to be inclined in a trumpet shape upward. Further, a through hole 12c is formed on the bottom surface of the guide receiving member 12 so as to penetrate the engagement surface P between the shift fork F and the coupling sleeve Sb.

  Next, the movement of the lubricating oil supplied to the engagement surface P between the coupling sleeve Sb and the shift fork F in accordance with the operation of the transmission 1B of the third embodiment configured as described above will be described. For the sake of simplification, the case where the lubricating oil is supplied to the engagement surface P between the coupling sleeve 42 b and the shift fork 72 of the first and second speed synchronizer 42 will be described as an example.

FIG. 9 is a state diagram showing a state in which lubricating oil is supplied to the engagement surface P between the coupling sleeve 42 b and the shift fork 72.
When the coupling sleeve 42b is in the neutral state, as shown in FIG. 9A, the lubricating oil flows out from the through hole 8a located almost immediately above the through hole 12c and is engaged with the engagement surface P through the through hole 12c. To be supplied.
Next, when the coupling sleeve 42b is shifted to the first speed side, as shown in FIG. 9B, the coupling sleeve 42b is moved in the axial direction to the right in the figure, and the through hole 12c is moved from the through hole 8a. However, since the through hole 8a is positioned almost directly above the center of the inclined surface 12b of the guide receiving member 12, the lubricating oil that has flowed out of the through hole 8a is received by the inclined surface 12b and inclined. It flows down along the surface 12b and is supplied to the engaging surface P through the through hole 12c.
Similarly, when the coupling sleeve 42b is shifted to the 2nd speed side, as shown in FIG. 9C, the coupling sleeve 42b is axially moved to the left side in the drawing, and the through hole 12c is moved from the through hole 8a. However, since the through hole 8a is positioned almost directly above the center of the inclined surface 12a of the guide receiving member 12, the lubricating oil flowing out of the through hole 8a is received by the inclined surface 12a and inclined. It flows down along the surface 12a and is supplied to the engaging surface P through the through hole 12c.
Needless to say, the coupling sleeve Sb other than the coupling sleeve 42b, that is, the coupling sleeves 41b, 43b, and 44b, also exhibits these effects.

  According to the transmission 1B of the third embodiment described above, the through hole 8a is formed in the oil supply pipe 8 at a position corresponding to substantially directly above the through hole 12c when each shift fork F is in the neutral position. Since the guide receiving member 12 having the inclined surfaces 12a, 12b and the through hole 12c is provided on the upper portion of the shift fork F, when the shift fork F is in the neutral position, the engagement between the shift fork F and the coupling sleeve Sb is performed. When the lubricating oil can be supplied from almost right above the mating surface P through the through hole 12c, and the shift fork F is shifted to the speed change position, the receiving through hole 12c is received by the inclined surfaces 12a and 12b of the guide receiving member 12. The lubricating oil can be supplied to the engagement surface P via That is, the oil supply pipe line 8 is provided with a through hole 8a at one position at a position corresponding to a position almost directly above the through hole 12c when each shift fork F is in the neutral position. Lubricating oil can be supplied to the engagement surfaces P of the forks F and the coupling sleeves Sb and the engagement surfaces P of the shift forks F and the coupling sleeves Sb shifted to the shift position. As a result, it is possible to prevent wasteful lubricating oil from flowing out and to reduce the amount of lubricating oil as compared with the case where the through hole 8a is provided at the position of the oil supply pipe line 8 corresponding to the neutral position and the shift position of each shift fork F. Can be minimized. Further, since only the guide receiving member 12 is provided on the upper portion of the shift fork F, the lubrication of the engagement surface P can be easily ensured.

  In the transmission 1B of the third embodiment, the guide receiving member 12 is fixed to the upper part of the shift fork F by welding or the like, but may be formed integrally with the shift fork F.

  As mentioned above, although embodiment of this invention was described using the Example, this invention is not limited to such an Example, In the range which does not deviate from the summary of this invention, it can implement with a various form. Of course.

It is a schematic internal block diagram of a transmission. It is the front block diagram which looked at an example of the structure of the coupling sleeve from the front. It is a side block diagram of FIG. (A), (b), (c) is a state figure which shows the state by which lubricating oil is supplied to the engagement surface of a coupling sleeve and a shift fork. It is the front block diagram which looked at an example of the structure of the coupling sleeve in the transmission of 2nd Example from the front. It is a side block diagram of FIG. (A), (b), (c) is a state figure which shows the state by which lubricating oil is supplied to the engagement surface of a coupling sleeve and a shift fork. It is the side block diagram which looked at an example of the structure of the shift fork in the transmission of 3rd Example from the side. (A), (b), (c) is a state figure which shows the state by which lubricating oil is supplied to the engagement surface of a coupling sleeve and a shift fork.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission 2 Input shaft 5 Counter shaft 6 Output shaft 8 Oil supply line 8a Through hole 9 Oil pump 10, 11, 100 Ring member 10a, 11a, 100a Anti-rotation part 10b, 11b, 100b Inclined surface 12 Guide receiving member 12a, 12b Inclined surface 12c Through hole 35, 36, 32, 33, 34 Drive gear 41, 42, 43, 44 Synchronizer 41a, 42a, 43a, 44a Synchro hub 41b, 42b, 43b, 44b Coupling sleeve 65, 66, 62 , 61, 63, 64 Driven gear

Claims (7)

A transmission that shifts a coupling sleeve that is engaged with a shift fork from a neutral position that is not engaged with the transmission gear by the shift fork to a transmission position that is engaged with the transmission gear,
Lubricating oil outflow means for flowing out lubricating oil toward the engagement surface between the shift fork and the coupling sleeve at either the neutral position or the shift position;
Guiding means capable of guiding the lubricating oil flowing out at either the neutral position or the shift position to the engagement surface at either the shift position or the neutral position;
A transmission comprising:   The lubricating oil outlet means feeds the lubricating oil to the lubricating oil flow path, a through-hole serving as the lubricating oil outlet formed in the lubricating oil supply pipe, and the lubricating oil flow path. The transmission according to claim 1, wherein the transmission has a feeding means for feeding.   The transmission according to claim 1 or 2, wherein the guide means is disposed on the coupling sleeve.   4. The transmission according to claim 3, wherein the guide means includes a protruding portion that protrudes with an inclined surface inclined toward the through hole from a side portion of the engagement surface of the coupling sleeve.   The transmission according to claim 4, wherein the protruding portion is a ring member fixedly disposed on the side portion.   The transmission according to claim 5, wherein the ring member is fixedly disposed on the side portion with a rotation stopper. The transmission according to any one of claims 4 to 6, comprising a first shift position and the second shift position sandwiching the neutral position as the shift position,
The through hole is formed at a position corresponding to the neutral position of the oil supply pipeline,
The protrusion includes a first protrusion capable of guiding the lubricating oil to the engagement surface at the first shift position, and a second protrusion capable of guiding the lubricant to the engagement surface at the second shift position. And a transmission provided at both ends of the engagement surface of the coupling sleeve.

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