JPS6121466A - Lubricating device in speed change gear for vehicles - Google Patents

Abstract

PURPOSE:To perform favorable lubrication so simply in an accurate manner, by racking up lubricating oil with a shifting gear inside a rear cover and, after collecting it in an oil guide, lubricating it to a bearing, in case of a speed change gear to be mounted rearward down on a car. CONSTITUTION:In case of a speed change gear to be mounted rearward down aslant on a car, a large quantity of lubricating oil is raked up with rotation of a fifth speed driven gear to be impregnated deepest in oil inside a rear cover 2 in time of car driving. If so, the lubricating oil goes up through a clearance between the driven gear 33 and the rear cover 2, colliding with a rib 67 or the like and dropping down, and is collected on an oil receiver 62 of an oil guide 60, then it flows in the rear and gathered inside an oil sump 69. And, the lubricating oil in the oil guide 60 flows into an oil passage 43 of an input shaft 8 from a lubricating port 68 at a bottom part, and in the point midway in this oil passage, it branches off from each of oil holes 44, 45 and 49, thereby forcedly lubricating neddle bearings 40-42 for each of shifting gears 25, 27 and 33.

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a lubrication device for a transmission gear for a vehicle, and in particular, a bearing that rotatably supports a transmission gear on an oil surface when the transmission gear is mounted inclined with respect to the horizontal direction. Regarding lubrication.

[Prior art and problems]

In a vertical transmission gear device, the output shaft is generally arranged parallel to the input shaft below it, and multiple sets of transmission gears are provided between these two shafts. In some cases, a speed change drive gear is rotatably supported by a needle bearing or the like. Here, if the speed change gear device is mounted horizontally, the speed change driven gears on the output shaft side in the lower position are all approximately equal to each other.
It is also possible to lubricate the bearings located on the input shaft side in high places with the droplets that are immersed in the oil and thrown up by the gears. On the other hand, when the transmission gear unit is installed with a backward downward tilt, there is a difference in the immersion of the driven gear on the output shaft side into the oil, and the splashed up droplets are reduced, and the drive gear bearing on the input shaft is It may be difficult to lubricate adequately. Furthermore, in a configuration in which a rear cover is coupled to the rear part of the transmission case and a fifth speed gear is housed therein, lubricating oil from the transmission case side tends to flow down to the rear cover side, resulting in a lower oil level. Therefore, for example, Utility Model Application No. 51-369, Utility Model Application No. 50-1
As shown in Publication No. 52067, it is necessary to form an oil passage in the bearing of each transmission drive gear from the inside of the input shaft to supply oil directly to the bearing. However, in the case where the transmission gear device is mounted at an angle, it is difficult to sufficiently collect the lubricating oil with the former type of the prior art described above, and furthermore, the lubricating oil is poorly distributed to each bearing. Further, the latter type has problems such as the inability to guide lubricating oil from the bottom to the top of the oil passage of the inclined shaft.

[Purpose of the invention]

In view of these circumstances, the present invention has been devised to sufficiently lubricate the needle bearing that supports the gear of the input shaft above the oil level by using droplets generated by the gear when the gear is mounted tilted backwards. To provide a lubricating device for a transmission gear device for a vehicle, which prevents a drop in the level of lubricating oil on the transmission case side when a rear cover is not coupled to the rear part of the transmission case.

[Structure of the invention]

For this purpose, the configuration of the present invention focuses on the point where the oil level of the rear cover is the highest when the rear cover is coupled to the rear of the transmission case and is mounted tilting downward at the rear.
The droplets scraped up by the transmission gear inside the rear cover are collected in an oil guide, stored at a position higher than the position of the needle bearing to be oiled, and flowed through the oil passage inside the input shaft from the rear lower part to the front upper part. The main purpose of this system is to uniformly supply oil to a plurality of needle bearings and to compensate for a drop in the oil level on the transmission case side. DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. Referring to FIG. 1, the overall structure of a vertical transaxle type FF vehicle will be described. A rear cover 2 is coupled to the rear of a transmission case 1. The transmission case 1 has a split structure with left and right parts divided into three chambers 3 to 5. The front chamber 3 houses the clutch 6, the middle chamber 4 houses the front differential device 10, and the rear chamber 5 houses the clutch 6. A speed change gear device 20 is provided on the rear cover 2, a crankshaft 1 from the engine is connected to an input shaft 8 of the speed change gear device 20 via a clutch 6, and an output shaft 9 thereof is connected to a front differential device 10. The front differential device 10 includes a drive pinion 11 formed at the front end of the output shaft 9, this pinion 11 meshing with a crown gear 12, and a differential device 13 integrally provided in the center of the crown gear 12 on the front wheel side. connected to. The variable speed gear device 20 is of a constant mesh type with overdrive, 5 forward speeds, and 1 reverse speed. Between 8 and 9, there are a first gear 21.22, a second gear 23.24, a third gear 25.26, and a fourth gear 27.28. Here, the driven side gears 22, 24 for the first speed and the second gear are rotatably fitted to the output shaft 9, and a synchronizer 29 is provided between these three,
For 3rd and 4th speed, drive side gear 25.27
is rotatable on the input shaft 8, and a synchronizer @30 is provided between these three. Further, for reversing, an idler gear (not shown) moves and meshes with the drive gear 31 of the input shaft 8 and the driven gear 32 on the sleeve side of the synchronizer 29. Further, the rear parts of the input shaft 8 and the output shaft 9 protrude into the rear cover 2, and a rotatable drive gear 33 having a fifth continuous gear 33, 34 between the shafts 8 and 9 on the cover 2 side
A synchronizer 35 is provided between the input shaft 8 and the input shaft 8 . In this way, by selectively engaging the three sets of synchronizers 29, 30, and 35 with the transmission gears or meshing the idler gear, the transmission power for five forward speeds and one reverse speed is extracted to the output shaft 9. In the above configuration, the transmission case 1 and the rear cover 2 are mounted so as to be inclined backwardly at an angle of, for example, 9 degrees with respect to the horizontal direction, and the lubricating oil level when at rest is at the position shown in FIG. Therefore, each transmission driven gear 22, 24, .
26.28.32.34 is directly immersed in lubricating oil for lubrication. Here, the rearmost gear 34 is immersed in the oil the deepest among the gears of the output shaft 9, and is arranged to be advantageous for scraping up the oil. In addition, the input shaft 8 of the transmission gear device 20
Drive gears for each transmission installed on 21.23.25
．． 27.31° 33 is above the oil level, and 3rd gear to 5th gear
The speed drive gear ν25.27.33 is a needle bearing 40
It is rotatably supported on the shaft 8 via 42. Referring to FIGS. 2 to 4, a lubricating device for the needle bearings 40 to 42 will be explained. First, input shaft 8
An oil passage 43 is formed at the rear end of the frontmost needle bearing 40 at the center of the interior thereof, and the oil passage 43 communicates with the needle bearing 40 via an oil hole 44 . The middle needle bearing 41 is connected to the oil passage 43 through an oil hole 45, a hole 46 on the circumference, and a hole 48 in the inner race 47, and the rear needle bearing 42 is connected to the oil hole 45.
9. Circumferential groove 50, spline groove 51, synchro@f
j135 through a groove 53 formed in the side of the hub 52, thus forming a lubrication circuit to each needle bearing 40 to 42. Further, an oil guide 60 is installed above the center of the drive gear r33 in the rear cover 2, and the lower end of this oil guide 60 communicates with the rear end opening of the oil passage 43. As shown in FIG. 4, the oil guide 60 has an arc-shaped oil receiver G groove 2 horizontally attached to the upper end of a V-shaped main body 61 having a radius approximately equal to that of the drive gear 33, and has oil receivers 62 at both left and right ends. The protrusion 63 is formed, and the main body 61
There are ribs 64 around the oil receiver G2 and the other side except for that on the opposite side.
is formed. Further, a rib 65 is formed in a V shape on the inner surface 2a of the rear cover 2, and these glue pro 4
．． 65 and attach the main body 61 to the rib 65 with the bolt 66.
By fastening the oil guide 60 to the rear cover 2 side, the oil receiver 62 is installed inside the main body 61.
An oil reservoir 69 communicating with is formed. The oil receiver 62 of the oil guide 60 is installed immediately after the tooth 33a of the drive gear 33 as shown in FIG. A rib 07 is provided in the middle of the oil receiver 62 on the side of the carrier cover 2 so as to extend over the entire length in the longitudinal direction. Further, an oil filler port 68 projects from the bottom of the main body 61, and this oil filler port 68 is deeply and loosely fitted into the rear end of the oil passage 43 with a certain gap. Here, the oil supply fL Q 1 from the oil guide GO and the storage amount Q2 in the oil guide 60 are determined to have a relationship of Ql minus G2 from the low vehicle speed range. Between the water head H21 to I3* H4+ and the water head H1 from the oil filler port 68 of the lowest oil guide 60 to each needle bearing 40 to 42 when the oil guide 60 is filled with oil, l-11>H2 It is set so that it holds true in the practical range of. Furthermore, in order to prevent the oil supply amount from becoming uneven based on the difference in the water head of each needle bearing, for example, each oil hole 44, 45
．． 49 apertures Dz, D3, and D4 are Dz>D3>D
− is defined in the relationship. Next, the operation and lubrication effect of the transmission gear device configured as described above will be explained. First, engine power is transmitted to the input shaft 8 of the transmission gear device 20 via the clutch 6, and the transmission power taken out from the output shaft 9 is transmitted to the front differential gear @10.
FF driving is performed by transmitting the signal to the front wheels via the front wheel. Since the fifth speed driven gear 34, which is immersed most deeply in the oil in the rearmost rear cover 2, rotates, a large amount of lubricating oil is scraped up, and this is further immersed in the fifth speed driven gear 34. As shown in Figure 3, it is carried upward through the gap between the drive gear 33 and the rear cover 2. The material that collides with the rib 67 or passes through the rib 67 collides with the protrusion 63 and falls, and after being collected on the oil receiver 62 of the oil guide 60, it flows backward due to its inclination and enters the oil reservoir 69. It accumulates in In this way, the oil guide 60
The lubricating oil inside the carrier cover 2 is supplied by scraping up the gear 33 there, and is always filled and stored depending on the relationship with the amount of oil supplied. On the other hand, the lubricating oil of this oil guide 60 flows into the oil passage 43 of the input shaft 8 from the oil supply port 68 at the bottom, where the water head on the oil guide 60 side is sufficiently higher than the water head of the needle bearing 40 at the highest position in the front. Due to the high temperature, the oil travels from bottom to top in the inclined oil passage 43, and in this process branches from each oil hole 44, 45, 49 to the needle bearing 40 of each transmission gear 25.27° 33. 42 are evenly supplied with oil for forced lubrication.

【Effect of the invention】

As is clear from the above embodiments, according to the present invention, when a transmission gear device is mounted at an angle, the rearmost gear that is immersed in oil can be removed without immersing all the gears in oil. By using forced lubrication, the transmission gear 25.2 is placed on the oil surface.
Since the needle bearings 40 to 42 that pivotally support 7.3.3 can be sufficiently lubricated, the durability of the bearings is improved and good performance can be ensured. Furthermore, since there is no need to increase the amount of oil, the drag torque of gears in oil is reduced and transmission efficiency is improved. Since much of the lubricating oil in the rear rear cover 2 of the transmission case 1 is guided toward the transmission case 1 side, the drop in the oil level can be compensated for. Since the oil flows from the bottom to the top in the oil passage 43 of the inclined input shaft 8, the distribution efficiency of each needle bearing is good and the oil is uniformly supplied, so that each bearing can be well lubricated. Since the oil guide 60 is fastened to the inner surface of the rear cover 2, it has excellent assemblability and vibration resistance.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device according to the present invention;
FIG. 2 is an enlarged sectional view of the main parts, FIG. 3 is a sectional view taken along line II in FIG. 1, and FIG. 4 is an exploded perspective view of the oil guide. 1... Transmission case, 2... Rear cover, 6... Clutch, 7... Crankshaft, 8...
Input shaft, 9... Output shaft, 10... Front differential device, 20... Speed change gear device, 33.34... Speed change gear, 40-42... Needle bearing, 43... Oil Passage, 44.45.49...oil hole, 60...oil guide, 67...rib. Patent applicant: Fuji Heavy Industries Co., Ltd. Agent: Patent attorney: Makoto Kobashi, Ukiyo Patent attorney: Susumu Murai Figure 3: Figure 4

Claims (1)

[Claims] In a transmission case and a rear cover that is connected to the rear of the transmission case, there are multiple sets of gears for shifting, and these gears are mounted tilted downward at the rear. An oil guide for collecting oil is provided, and the oil in the oil guide flows through an oil passage inside the input shaft above the oil surface from the rear lower part to the front upper part, and a plurality of needle bearings pivotally support the transmission gear. A lubrication device for a transmission gear device for a vehicle, characterized in that the device is configured to uniformly supply oil to perform forced lubrication.