JPS6017569Y2 - Automotive gear transmission - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a gear transmission for automobiles that is designed to suppress vibrations of the transmission case.

The above transmission case has the shape of a container because it is necessary to protect the gears therein and to store oil for lubricating these gears.

Therefore, when the vibrations generated by the meshing rotation of the gears are transmitted to the transmission case through the respective shafts and the bearings supporting the shafts, large vibration noises (abnormal noises) are induced.

In consideration of these circumstances, this invention was developed to reduce the vibration caused by the meshing of gears in the transmission case.
It is an object of the present invention to provide a gear transmission for an automobile that can effectively suppress transmission of power to the entire case.

Next, the configuration of this invention will be explained in detail according to an embodiment shown in the drawings.

In Figure 1, which shows the internal structure of a gear transmission, the reference numeral 1
2 indicates a transmission case, 2 a clutch housing disposed on the front side of the case 1, and 3 an extension housing disposed on the rear side of the case 1.

The transmission case 1 is formed into a cylindrical shape having a front wall and no rear wall, and on the inner periphery of the joint between the case 1 and the clutch housing 2,
These mutually form an annular groove 4 having a U-shaped cross section.

Further, on the inner periphery of the joint between the case 1 and the extension housing 3, an annular groove 5 having the same U-shaped cross section is formed by them.

A pair of support plates 8 and 9 formed separately for any of the transmission case 1, clutch housing 2, and extension housing 3 have an outer peripheral shape that corresponds to each of the annular grooves 4 and 5. It is set.

That is, these support plates 8 and 9 are provided with vibration isolating members 17 for each of the annular grooves 4.5 when connecting the transmission case 1 and the clutch housing 2, and when connecting the case 1 and the extension housing 3. It can be assembled with the .18 interposed.

Then, the flanges IA and 2A of the case 1 and the clutch housing 2 are fastened together with bolts 6, and the case 1
The extension housing 3 and the extension housing 3 are similarly fastened to each other by bolts 7 at their flanges IB and 3A.

As a result, both support plates 8 and 9 are disposed at positions corresponding to the front wall and rear wall of the transmission case 1, respectively, with the vibration isolating members 17 and 18 interposed therebetween.

Note that the above-mentioned vibration isolating members 17 and 18 are generally made of rubber, etc., but rubber is used to prevent the positioning (mainly centering) between the transmission case 1 and both support plates 8 and 9 from changing significantly due to its elasticity. It is necessary to select the hardness and wall thickness of the material.

Of the two support plates 8, 9, the plate 8 located on the front side supports the input shaft 10 of the gear transmission and the front end of the counter gear 12 by means of bearings 11, 13, respectively.

The plate 9 located on the rear side also supports the output shaft 14 of the gear transmission as well as the rear end of the counter gear 12 by bearings 15, 16, respectively.

In the above configuration, the meshing between the gear IOA of the input shaft 10 and the counter drive gear 12A,
Alternatively, vibrations generated by the meshing of each gear on the output shaft 14 with the corresponding counter gear are transmitted to the respective bearings through the shaft portions of the input shaft 10, output shaft 14, and counter gear 12.

The vibrations transmitted to these bearings vibrate the respective support plates 8 and 9, but the vibrations of each plate 8.9 are absorbed by the respective vibration isolating members 17.18, and the transmission case 1 In addition, vibration transmission to both housings 2 and 3 is significantly suppressed.

Next, the embodiment shown in FIGS. 2 to 5 will be described.

First, in the embodiment shown in FIG. 2, the means for positioning each support plate 8, 9 with respect to the transmission case 1 side is changed.

That is, in this embodiment, the transmission case 1
A plurality of holes 19 are formed in the circumferential direction on the inner periphery of each joint between the housings 2 and 3, and holes 20 are formed on the outer periphery of each support plate 8 and 9 in correspondence with these holes 19. is formed.

Then, insert knock pins 21 into these holes 19 and 20.
By inserting the support plates 8 and 9, the support plates 8 and 9 are positioned relative to the transmission case 1 side.

Therefore, in this embodiment, the annular groove 4 of the embodiment shown in FIG.
, 5 are unnecessary.

In this embodiment as well, a vibration isolating member 17 is provided between the transmission case 1 side and the outer peripheries of both plates 8 and 9.
．． 18 is interposed.

FIG. 3 shows a further different embodiment, showing only the joint between the transmission case 1 and the extension housing 3. In FIG.

In other words, this embodiment is designed to improve the accuracy of centering of the support plate, and is designed between the rear side support plate 9 shown as an example and the 1tafR5 to (7) on the transmission case 1 side. The vibration isolating member 18 is interposed only in the thrust direction.

As a result, the outer circumferential surface of the plate 9 and the inner circumferential surface of the annular groove 5 come into direct contact, and the centering accuracy of the plate 9 is improved.

Note that it is preferable to make the plate 9 and the annular groove 5 circular and to align them with each other by 4709 degrees in order to improve the centering accuracy of the plate 9. It is necessary to use knock pins, etc. to prevent displacement.

In the embodiment shown in FIGS. 4 and 5, a pair of support plates 8 and 9 are integrated by a plurality of connecting members 22. As shown in FIG.

In this case, to position the plates 8 and 9 in the thrust direction, it is sufficient to fix one of the plates to the transmission case side. 18
The above-mentioned positioning is achieved by interposing them and fitting them together.

Further, in this embodiment, each of the connecting members 22 described above is positioned by the inner peripheral surface of the transmission case 1 via the vibration isolating member 23, so that both the supporting plates 8,
It forms the centering of 9.

In addition, in FIGS. 2 to 5, parts that are considered to have the same or equivalent configuration as those of the embodiment shown in FIG. 1 are designated by the same reference numerals in the drawings, and redundant explanations are omitted.

As described above, this invention has a structure in which the support plate that rotatably supports each shaft of the gear transmission is formed separately from the transmission case side, and a vibration isolating member is interposed between them. This suppresses the transmission of vibrations caused by the meshing of the gears to the transmission case through the respective shafts, thereby significantly reducing the occurrence of abnormal noises caused by the vibrations of the transmission case.

Moreover, in the present invention, the support plate is positioned relative to the inner periphery of the coupling portion between the transmission case, the clutch housing, and the extension housing, and is assembled with the vibration isolating member interposed. The centering accuracy of the support plate with respect to the transmission case, clutch housing and extension housing is improved, and the above-mentioned one member is connected to the transmission case, /7
- It also exhibits the advantage of performing a sealing function at the respective joints with the housing and the extension housing.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a sectional view showing the inside of a gear transmission, and FIG. 3 is a sectional view showing the third embodiment by a part of the joint between the transmission case and the extension housing, and FIG. 4 is a sectional view showing the fourth embodiment in correspondence with FIG. 2. The corresponding sectional view and FIG. 5 are external perspective views showing only the support plate of FIG. 4. 1...Transmission case, 2...
...Clutch housing, 3...Extension housing, 4, 5...Annular groove, 8,9...
...Support plate, 17, 18.23...
- Vibration isolation member, 21...Dowel pin.

Claims (1)

[Scope of utility model registration request] A support plate that rotatably supports each shaft of the gear transmission with bearings is formed separately from the transmission case and the clutch housing and extension housing that are connected to the front and rear sides of the transmission case. A gear transmission for an automobile, characterized in that it is assembled with a vibration isolating member interposed while being positioned relative to the inner periphery of each connecting portion with a clutch housing and an extension housing.