JP4810288B2 - Lubricating device for vehicle transmission - Google Patents

Description

The present invention is input, the engine crankcase which accommodates the transmission having an output shaft and a transmission gear train of the multi-stage arranged in the axial direction, the lubricating oil extend in the arrangement direction of the multi-stage transmission gear train A vehicular transmission comprising a groove-like oil reservoir to which lubricating oil is supplied from a supply source, and an oil guide wall for guiding and flowing down the oil overflowing from the oil reservoir onto the transmission gear train. The present invention relates to an improvement of a lubrication device.

Such a lubricating device for a vehicle transmission is already known, as disclosed in Patent Document 1.
Japanese Patent No. 3596675

  In conventional lubrication devices for vehicle transmissions, the depth of the oil reservoir is constant, so the amount of oil stored in the oil reservoir overflowing to the oil guide wall side due to vehicle acceleration / deceleration and vibration is also the same for each part. Accordingly, the amount of oil supplied to the multi-stage transmission gear train is also uniform in each train.

  However, in a multi-stage transmission gear train, a high-speed system is generally used more frequently than a low-speed system, and thus high lubricity is required. For this reason, conventionally, oil supply according to the lubrication requirements of the high-speed system is required. Although the amount is set, an oil pump as a lubricating oil supply source is required to have a large capacity.

  The present invention has been made in view of such circumstances, and a multi-stage transmission gear train is provided so that an amount of oil corresponding to the degree of lubrication requirement can be supplied to each of the multi-stage transmission gear trains. An object of the present invention is to provide a lubricating device for a vehicular transmission that can prevent the increase in capacity of a lubricating oil supply source while ensuring the durability of the vehicle.

To achieve the above object, the present invention is input, the output shaft and the engine crankcase which accommodates the transmission and a axial multistage transmission gear arranged in rows, the sequence of the multi-stage transmission gear train a storage groove-like oil oil is supplied from the lubricating oil supply source extend in a direction, and an oil guide wall which induces an overflowing oil from the upper end of the oil sump on the transmission gear train provided, the vehicle during the deceleration time or vertical vibration, the oil sump to the oil collected is Ru outflow can der to stretch the oil guide wall side from an upper end of the reservoir the oil by inertial force, a lubricating device for a vehicle transmission The oil sump is located at a position corresponding to the high-speed gear train in the multi-stage transmission gear train and at a position corresponding to the first sump portion having a deep depth and the low-speed gear train in the multi-stage gear train. What depth It is constituted by a shallow second reservoir portion, and the amount of oil flowing out from the first reservoir portion to the oil guide wall side at a time during acceleration / deceleration or vertical vibration of the vehicle is reduced from the second reservoir portion all at once. The first feature is that the amount of oil flowing out toward the guide wall is larger than the amount of oil flowing out .

In addition to the first feature, the present invention has a second feature that a dam is formed in a side edge of the oil reservoir adjacent to the oil guide wall of the oil reservoir .

Furthermore, in addition to the first or second feature, the third feature of the present invention is that the high speed gear train is a third gear train or a top gear train.

Furthermore, in addition to any of the first to third features, the present invention provides a correspondence between the oil sump and the oil guide wall with a two-speed gear train or a top gear train excluding the low gear train in the transmission gear train. And the first reservoir portion is disposed at a position corresponding to the third gear train or the top gear train, and the second reservoir portion is disposed at a position corresponding to the second gear train. A fourth feature is that oil for raising the crankshaft of the engine adjacent to the gear train is supplied.

Furthermore, in addition to any one of the first to fourth features, the present invention further includes a step portion serving as a boundary between the first reservoir portion and the second reservoir portion on the bottom surface of the oil reservoir. This is the fifth feature.

Furthermore, in addition to any of the first to fifth features, the present invention provides an oil supply path provided in the crankcase for supplying oil from a lubricating oil supply source to the oil reservoir. A sixth feature is that the opening is open.

According to the first feature of the present invention, during acceleration / deceleration or vertical vibration of the vehicle, the oil accumulated in the oil reservoir can flow out from the upper end of the oil reservoir to the oil guide wall side at once due to inertial force. In the machine lubrication device, the oil reservoir is located at a position corresponding to the high-speed gear train in the multi-speed gear train, and the first reservoir portion having a deep depth is associated with the low-speed gear train in the multi-speed gear train. And a second reservoir portion having a shallow depth at a position, and the amount of oil flowing out from the first reservoir portion to the oil guide wall at the time of acceleration / deceleration or vertical vibration of the vehicle is 2 Since the amount of oil flowing out from the reservoir to the oil guide wall is increased , the oil accumulated in the oil reservoir flows out to the oil guide wall at a time when the vehicle accelerates or decelerates or vertically vibrates. Supplied to the transmission gear train The time, the most frequently used speed gear train, a relatively large amount of oil from the deep first reservoir depth, also in the less frequently used speed gear train, comparing the shallow depth second reservoir A small amount of oil is surely distributed. By rationally using a limited amount of oil sent from the lubricating oil supply source to the oil reservoir, the durability of all transmission gear trains can be maintained uniformly and the capacity of the lubricating oil supply source can be increased. Ru can be avoided.

  According to the third feature of the present invention, during acceleration / deceleration and vertical vibration of the vehicle, a large amount of oil is supplied from the first reservoir to a particularly frequently used third-speed gear train or top gear train. Durability can be increased.

  According to the fourth aspect of the present invention, during acceleration / deceleration or vertical vibration of the vehicle, a large amount of oil is supplied from the first reservoir to a frequently used third-speed gear train or top gear train, and their durability is improved. On the other hand, a small amount of oil is supplied from the second reservoir to the infrequently used second-speed gear train, and the low gear train is supplied by the repelling oil of the crankshaft of the engine. Since the oil supply to the low gear train is stopped, the amount of oil supplied to the frequently used third-speed gear train or the top gear train can be increased to further improve the durability thereof.

  According to the fifth feature of the present invention, the difference between the oil outflow amount from the first reservoir and the oil outflow from the second reservoir during acceleration / deceleration and vertical vibration of the motorcycle can be achieved. A limited amount of oil can be distributed more reasonably to the transmission gear train.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on preferred examples shown in the accompanying drawings.

  1 is a longitudinal side view of a motorcycle engine provided with a lubricating device according to an embodiment of the present invention, FIG. 2 is an enlarged view of a transmission unit in FIG. 1, and FIG. 3 is a sectional view taken along line 3-3 in FIG. FIG. 4 is a diagram corresponding to FIG. 3, showing another embodiment of the present invention.

  First, in FIG. 1, reference numeral E is a four-cycle engine for a motorcycle, and when the motorcycle is mounted on a vehicle body, the cylinder portion 1 is disposed forward of the vehicle or slightly upward. Hereinafter, the front, rear, left and right in the engine E will be referred to based on the motorcycle on which the engine E is mounted.

  A transmission T is accommodated together with the crankshaft 3 in the crankcase 2 connected to the base of the cylinder portion 1. Accordingly, the portion of the crankcase 2 that houses the transmission T also serves as the crankcase.

  As shown in FIGS. 1 to 3, the crankcase 2 includes a left first case half 2 a and a right second case half 2 b that are bolted to each other on a vertical plane including the axis of the cylinder portion 1. The crankshaft 3 that is configured horizontally by the two case halves 2a and 2b, the input shaft 5 that is disposed in parallel to the rear of the crankshaft 3, and the rear of the transmission input shaft 5 And an output shaft 6 arranged in parallel with it.

  The transmission T includes the input and output shafts 5 and 6, and multi-stage transmission gear trains arranged between the shafts 5 and 6, that is, the low gear train G1, the second gear train G2, the third gear train G3, And a top gear train G4.

  In the illustrated example, these transmission gear trains G1 to G4 are arranged in order of a low gear train G1, a third gear train G3, a top gear train G4, and a second gear train G2 from the right side. Each of the establishments is selected by a known change mechanism 8, and when the motorcycle is operated, the transmission gear trains G1 to G4 are sequentially established to be transmitted from the crankshaft 3 to the input shaft 5. The rotation is shifted stepwise and transmitted to the output shaft 6 and further transmitted to the rear wheel of the motorcycle via a chain transmission 7 connected to the outer end of the output shaft 6.

  The first and second case halves 2a and 2b are formed with a vertical wall 10 that descends from the ceiling so as to approach the front part of the drive gear group of the transmission gear trains G1 to G4. Is formed with a groove-like oil sump 11 that opens rearward and extends in the direction of arrangement of the transmission gear trains G1 to G4, and is joined to the oil sump 11 at the joint surfaces of the first and second case halves 2a and 2b. A groove-like oil supply passage 12 formed on one of the two is opened. A part of the oil O discharged from a lubricating oil pump (not shown) of the engine E is supplied to the oil supply path 12, and the oil O is accumulated in the oil reservoir 11.

  The vertical wall 10 also includes a weir 13 that forms the trailing edge of the oil sump 11, and a bowl-shaped oil guide wall that projects downwardly from the weir 13 to a position directly above the drive gear group of the transmission gear trains G1 to G4. 14 is integrally formed, and the oil O overflowing from the weir 13 is guided to the transmission gear trains G1 to G4 by the oil guide wall 14.

The oil reservoir 11 is formed such that its depth changes along the direction in which the transmission gear trains G1 to G4 are arranged. Specifically, the oil reservoir 11 is constituted by the first reservoir portion 11a having an open oil supply path 12 and a deep depth, and the second reservoir portion 11b having a shallow depth, and the first and second reservoir portions 11a, A step portion 11c is formed vertically at the boundary between 11b. The first reservoir 11a is formed to correspond to the middle and high speed gear trains, for example, the third gear train G3 and the top gear train G4, and the second reservoir portion 11b is formed of the low speed gear train, for example, the low gear train G1 and It is formed to correspond to the second speed gear train G2.

  Next, the operation of this embodiment will be described.

  When the motorcycle is operated at a low speed and relatively quietly, when a part of the oil discharged from the lubricating oil pump of the engine E is supplied to the oil supply passage 12, the oil O passes through the oil reservoir 11. After filling, it overflows from the weir 13 and is guided by the oil guide wall 14 to flow down onto the drive gear group of the transmission gear trains G1 to G4 to lubricate them.

  Further, during acceleration / deceleration operation or vertical vibration of the motorcycle, the oil O accumulated in the oil reservoir 11 jumps over the weir 13 at a stroke by the inertial force and flows out to the oil guide wall 14 side, and drives the gears G1 to G4. Although supplied to the group and lubricates them, in practice there are more such lubrication aspects.

  By the way, since the oil reservoir 11 is composed of a first reservoir portion 11a having a deep depth and a second reservoir portion 11b having a shallow depth, normally, a relatively large amount of oil O is contained in the first reservoir portion 11a. A relatively small amount of oil O is stored in the second reservoir portion 11b. Therefore, if the oil O in the first and second reservoirs 11a and 11b flows out to the oil guide wall 14 at a stroke due to acceleration / deceleration and vertical vibration of the motorcycle, the amount of oil flowing out from the first reservoir 11a is relatively large. However, since the amount of oil flowing out from the second reservoir 11b is relatively small, the oil supply amount to the third gear train G3 and the top gear train G4 corresponding to the first reservoir 11a is relatively large. The amount of oil supplied to the low gear train G1 and the second gear train G2 corresponding to the pool portion 11b is relatively small.

  Generally, in the transmission T, the high-speed gear train such as the third gear train G3 and the top gear train G4 is used more frequently than the low gear train such as the low gear train G1 and the second gear train G2. If the oil supply amount is increased on the high-speed gear trains G3 and G4 side and decreased on the low-speed gear trains G1 and G2, the limited amount of oil sent from the oil supply path 12 is changed to the transmission gear trains G1 to G4. Furthermore, it can be distributed according to the required degree of lubrication, and the durability of the transmission gear trains G1 to G4 can be ensured uniformly, so that the engine lubrication pump as the oil supply source has a particularly large capacity There is no need to make it.

  Further, in the oil reservoir 11, since the boundary between the first and second reservoir portions 11a and 11b is a vertical step portion 11c, oil outflow from the first reservoir portion 11a during acceleration / deceleration and vertical vibration of the motorcycle. It is possible to make a difference between the amount and the oil outflow amount from the second reservoir, and it is possible to more rationally distribute the limited amount of oil to the transmission gear trains G1 to G4.

  Next, another embodiment of the present invention shown in FIG. 4 will be described.

  In this embodiment, the oil reservoir 11 and the oil guide wall 14 are provided at positions corresponding to the second gear train G2 or the top gear train G4 excluding the low gear train G1 in the transmission gear train, and the first reservoir 11a is provided. The second gear 11b is disposed at a position corresponding to the third gear train G3 and the top gear train G4, the second reservoir 11b is disposed at a position corresponding to the second gear train G2, and the supply of oil to the low gear train G1 is performed by the engine E. This relies on oil splashing due to rotation of the crankshaft 3. Since the other configuration is the same as that of the above embodiment, the same reference numerals are given to the portions corresponding to those of the previous embodiment in FIG.

  According to this embodiment, during acceleration / deceleration or vertical vibration of the vehicle, a large amount of oil is supplied from the first pool portion 11a to the frequently used third-speed gear train G3 and top gear train G4, and their durability. On the other hand, a small amount of oil is supplied from the second reservoir 11b to the second-speed gear train G2, which is less frequently used, and the oil supply from the oil reservoir 11 is stopped for the low gear train G1, and the engine crank Since the oil is lubricated with the shaft repelling oil, the amount of oil supplied to the high-speed 3-speed gear train G3 and the top gear train G4 is increased as much as the oil supply from the oil reservoir to the low gear train is stopped. Durability can be further increased.

  As mentioned above, although the Example of this invention was described, this invention is not limited to the said Example, A various design change can be performed in the range which does not deviate from the summary of this invention. For example, the number of gears of the transmission is not limited to four as in the above embodiment, but may be three or five or more. The present invention can also be applied to vehicle engines other than motorcycles.

1 is a longitudinal side view of a motorcycle engine including a lubricating device according to an embodiment of the present invention. The enlarged view of the transmission part in FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. FIG. 4 is a view corresponding to FIG. 3 showing another embodiment of the present invention.

E ··· Engines G1 to G4 · · · Multi-speed gear train G1 · · · Low gear train G2 · · · 2nd gear train G3 · · · 3rd gear train G4 ··· ... Top gear train T ... Transmission 2 ... Crankcase 3 ... Crankshaft 11 ... Oil sump 11a ... First sump 11b... Second reservoir 11c... Step 12 ... oil supply path 14 ... oil guide wall

Claims (6)

Input, and the crankcase (2) of the engine (E) for accommodating the multi-stage transmission which is arranged in the axial direction gear train (G1 to G4) and a transmission provided with a (T) the output shaft (5,6), wherein A groove-like oil reservoir (11) extending in the arrangement direction of the multi-stage transmission gear trains (G1 to G4) and supplied with oil (O) from a lubricating oil supply source, and an upper end portion of the oil reservoir (11) An oil guide wall (14) for guiding the overflowing oil (O) onto the transmission gear train (G1 to G4) is provided , and accumulated in the oil reservoir (11) during acceleration / deceleration or vertical vibration of the vehicle. oil (O) is Ru outflow can der to stretch the oil guide wall (14) side from the upper end of the oil reservoir (11) by inertial force, a lubricating device for a vehicular transmission,
The oil reservoir (11) is located at a position corresponding to the high-speed gear train (G3, G4) in the multi-stage transmission gear train (G1 to G4) and has the same depth as the first reservoir (11a). A second reservoir portion (11b) having a shallow depth at a position corresponding to the low-speed gear train (G1, G2) in the multi-speed gear train (G1-G4); The amount of oil flowing out from the first reservoir (11a) to the oil guide wall (14) at a time during vertical vibrations flows out from the second reservoir (11b) to the oil guide wall (14). A lubricating device for a vehicle transmission, characterized in that the amount of oil flowing out is larger than the amount of oil flowing out . The lubricating device for a vehicle transmission according to claim 1,
Lubricating device for vehicle transmission, characterized in that a weir (13) is formed in a side edge of the oil reservoir (11) adjacent to the oil guide wall (14) in the crankcase (2). . The lubricating device for a vehicle transmission according to claim 1 or 2,
The lubricating device for a vehicle transmission, wherein the high-speed gear train is a third gear train (G3) to a top gear train (G4) in the multi-speed gear train (G1 to G4). In the lubricating device of the transmission for vehicles in any one of Claims 1-3 ,
The oil reservoir (11) and the oil guide wall (14) are provided at positions corresponding to the second gear train (G2) or the top gear train (G4) excluding the low gear train (G1) in the transmission gear train, The first reservoir (11a) is in a position corresponding to the third gear (G3) to the top gear train (G4), and the second reservoir (11b) is in a position corresponding to the second gear (G2). The vehicle is characterized in that the low gear train (G1) is supplied with repelling oil for the crankshaft (3) of the engine (E) adjacent to the transmission gear train (G1 to G4). Gearbox lubrication device. In the lubricating device of the transmission for vehicles in any one of Claims 1-4,
The bottom of the oil reservoir (11) is provided with a step portion (11c) serving as a boundary between the first reservoir portion (11a) and the second reservoir portion (11b). Transmission lubrication device. In the lubricating device of the transmission for vehicles in any one of Claims 1-5,
An oil supply path (12) provided in the crankcase (2) and supplying oil (O) from a lubricating oil supply source to the oil reservoir (11) opens into the first reservoir (11a). A lubricating device for a transmission for a vehicle.

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