JPH0515645Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to a lubricating device for shaft joints such as transmission gears, which supplies lubricating oil in a case by splashing it up.

(Prior art) Some transmissions used in the engine transmission systems of two- and four-wheeled vehicles are designed to splash lubricating oil sealed in a case to lubricate each sliding part. . In this case, there is no problem with lubrication of the outer surfaces such as gear meshing parts, but since the gears, synchronizer rings, etc. are supported parallel to each other in a crowded state, it is difficult to supply oil to the shaft joints, and the thrust surface Currently, we rely on a small amount of oil penetrating into the inner core by providing oil grooves that lead to the outer surface. For this reason, there has been a problem in that there is insufficient lubrication of the joint parts of gears and the like that constantly rotate at high speed on the shaft, which may lead to problems such as seizure.

(Problems to be solved by the invention) As mentioned above, in view of the problem that sufficient lubrication cannot be achieved in devices that splash oil in the case and supply it to shaft joints such as gears, this invention has the following problems: In order to solve this problem, we provide a lubrication device for shaft joints such as transmission gears that facilitates the reception of large amounts of splashed oil and ensures a sufficient supply of oil to shaft joints. It is something.

[Structure of the idea]

(Means for solving the problem) In line with the above purpose, the shaft joint lubricating device for transmission gears, etc. of this invention has an inner diameter larger than the shaft diameter, and a C-shape with a part of the annular shape cut away. A thrust washer is provided with a protrusion formed on the case, and the thrust washer is arranged such that the notch faces upward and a horizontal C-shaped gap is formed between the inner diameter and the outer circumference of the shaft. It has a configuration in which it is engaged with a stop groove and supported on the shaft.

(Function) With the above configuration, the lubricating oil stored at the bottom of the case and splashed up by the rotation of the immersed gear enters the inner hole from the notch of the thrust washer, and enters the space between the inner hole and the shaft. It is supplied to shaft-aligning and sliding parts such as gears through guide holes and guide grooves between the two ends. The thrust washer is held in such a way that it cannot rotate, and the notch always faces upward, making it easy to receive oil. Also, the space between the inner holes becomes an oil reservoir, so oil is plentifully applied to the shaft mating and sliding parts. supply

(Example) Hereinafter, the drawings showing the example of this invention will be described in detail.

Figure 5 shows a part of a transmission used in a four-wheeled vehicle, in which an input shaft 2 and an output shaft 3 are mounted coaxially and oppositely through a case 1, and a counter shaft 4 is arranged in parallel. . Rotation of the input shaft 2 is transmitted to the counter shaft 4 by a primary drive gear 5 and a primary driven gear 6. A third driven gear 9b is rotatably supported on the output shaft 3 with a synchronizer ring 12b interposed between it and the primary drive gear 5, and a row driven gear 7b is rotatably supported on the output shaft 3 with a synchronizer ring 12b interposed therebetween.
A reverse driven gear 11b and an overtop driven gear 10b are rotatably supported with a second driven gear 8b, a synchronizer ring 12c in between. The counter shaft 4 includes each of the driven gears 7b, 8b, 9b, 10b, 11.
A row drive gear 7a, a second drive gear 8a, a third drive gear 9a, an overtop drive gear 10a, and a reverse drive gear 11a, which are always in mesh with the drive gear b, are integrally molded or integrally supported. Reverse drive, driven gears 11a, 11b are reverse idle gears 11
mesh through c.

The synchronizer rings 12a, 12b, 1
2c is a shift fork 13a, 13b, 13c
via shift shafts 14a, 14b, 14c
The primary drive gear 5 or the driven gears 7b, 8b, 9b,
One of the output shafts 10b and 11b is connected to the output shaft 3, and the speed is changed to low, second, third, top, overtop, and reverse speed stages.

Next, the thrust washer 1 is installed between the bran redrive gear 5 and the ball bearing 15 that pivotally supports the input shaft 2, and between the row driven gear 7b and the intermediate ball bearing 16 that pivotally supports the output shaft 3.
7 and 18 are interposed.

As shown in FIGS. 1 and 2, the thrust washer 17 has an inner circumference 17a having a diameter sufficiently larger than the outer diameter of the input shaft 2, and a wide notch 19 in a part.
It has a C-shape, and a protruding piece 20 is formed on the outer periphery. This projecting piece 20 is engaged with a locking groove 21 provided in the case 1 to support the thrust washer 17 on the input shaft 2 with the notch 19 facing upward.
The locking groove 21 is provided on the mating surfaces of the case 1 divided into two parts to facilitate assembly, and has a depth that allows the protrusion 20 to be engaged with a sufficient margin in the axial direction. In this way, a horizontal C-shaped gap 22 is formed between the inner periphery 17a of the thrust washer 17 and the outer periphery of the input shaft 2. The primary drive gear 5 extends from the input shaft 2 end, is aligned with the outer periphery of the output shaft 3 end via a needle bearing 23, and has a guide hole penetrating the needle bearing 23 from the outer surface in contact with the gap 22. 24 are provided. Further, guide holes 25 and 26 are provided inwardly from the end of the output shaft 3 and open to the shaft joint portion of the third driven gear 9b.

The thrust washer 18 has the same shape as the thrust washer 17, as shown in FIGS. 3 and 4. That is, the diameter of the inner periphery 18a is larger than the outer diameter of the output shaft 3, and it is C-shaped with a notch 27, and the projecting piece 28 on the outer periphery engages with the locking groove 29 of the case 1 and is placed on the output shaft 3. Supported. The notch 27 faces upward, and a horizontal C-shaped gap 30 is formed between the inner circumference 18a and the output shaft 3. A guide groove 31 extends forward and backward around the support position of the thrust washer 18 on the output shaft 3, and includes a second driven gear 8b, a row driven gear 7b, a reverse driven gear 11b,
It communicates with the shaft joint portion of the overtop driven gear 10b.

Lubricating oil 32 is stored at the bottom of the case 1, and the lower portions of the primary drive gear 6, second and third drive gears 8a, 9a, etc. are immersed therein.
Further, oil jump rings 33 and 34 are extended on the counter shaft 4 facing the synchronizer rings 12a and 12b. oil jump ring 3
The outer circumferential shapes of 3 and 34 may be circular, polygonal, gear-shaped, or the like. Further, instead of the ring shape, it may be a wing piece.

Due to the rotation of the counter shaft 4, the oil splashed up by the gears such as the primary driven gear 6 and the oil jump rings 33, 34 is directly applied to the grooves of the synchronizer rings 12a, 12b, and the scattered oil is transferred to the thrust washer 17. ,1
8 from the notches 19, 27 to the spaces 22, 30, the guide holes 24, 25, 26 and the guide groove 3.
1 to the shaft joint portions of the primary drive gear 5 and each driven gear 7b, 8b, 9b, 10b, 11b.

[Effect of idea]

As mentioned above, the shaft joint lubricating device for transmission gears and other shaft joints according to this invention has a horizontal C-shape with a cutout at the top, and a horizontal C-shape between the inner circumference and the outer circumference of the shaft.
The thrust washer, which forms a space between the two sides of the letter, is supported by the case so that it cannot rotate.It effectively collects the oil scattered inside the case and supplies a sufficient amount of oil to the joints of gears and other shafts to improve lubrication performance. It has the effect of improving conduction efficiency, preventing problems such as seizure, and improving conduction efficiency.

[Brief explanation of the drawing]

The figure is a sectional view of a transmission for a four-wheeled vehicle showing an embodiment of this invention.
An enlarged longitudinal cross-sectional side view of the section, Figure 3 is Figure 4 B-B
FIG. 4 is an enlarged longitudinal sectional side view of section D in FIG. 5, and FIG. 5 is a partially expanded longitudinal sectional side view showing the entire transmission. 1... Case, 2... Input shaft, 3... Output shaft,
4... Counter shaft, 5... Primary drive gear, 6... Primary driven gear, 7a... Row drive gear, 7b... Row driven gear, 8
a...Second drive gear, 8b...Second driven gear, 9a...Third drive gear, 9
b...Third driven gear, 10a...Overtop drive gear, 10b...Overtop driven gear, 11a...Reverse drive gear, 11b...Reverse driven gear, 11c...
...Reverse idle gear, 12a, 12b, 12
c... Synchronizer ring, 13a, 13b,
13c...Shift fork, 17, 18...Thrust washer, 19, 27...Notch, 20,
28... protrusion, 22, 30... = interval, 21, 29
...Latching groove, 24, 25, 26...Guide hole, 1
...Guide groove.

Claims (1)

[Scope of utility model registration request] The thrust washer is equipped with a thrust washer whose inner diameter is larger than the shaft diameter and has a C-shape with a partially cut out annular protrusion on the outer periphery. A lubrication device for a shaft joint portion of a transmission gear or the like, characterized in that the projection engages with a locking groove provided in a case and is supported on the shaft so that a letter-shaped gap is formed.