JPS6131583Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a floor shift type gear transmission for an automobile, in which the shift lever retainer is interposed between an opening formed on the upper surface of the extension housing and a shift lever retainer attached thereto. This relates to an oil baffle that also serves as a vibration insulator from the extension housing to the shift lever retainer.

When droplets of lubricating oil within the extension housing adhere to the inner surface of the buff-full plate, this oil tends to gather at the corner portions of the buff-full plate and the inner surface of the housing and maintain its adhered state. In addition, in order to maintain the above-mentioned vibration-proofing effect, it is not possible to increase the tightening margin of the buttful plate, and as a result, vibrations applied to the buttful plate from the drive system and the vibration of the buttful plate due to shift lever operation are prevented. A slight movement causes capillary phenomenon at the joint surface between the buttful plate and the extension housing.
As a result, as described above, the oil adhering to the corner portions may seep out to the outside due to the capillary action of the joint surfaces.

In view of these circumstances, it is an object of the present invention to provide an oil baffle that can prevent oil within an extension housing from leaking to the outside without impairing the vibration-proofing effect.

Next, the configuration of the present invention will be explained in detail according to embodiments shown in the drawings.

First, in FIG. 1, which is a cross-sectional view of a part of an extension housing 1 in an automobile gear transmission, an opening 2 formed on the upper surface of the housing 1 has a butthole made of a vibration-proofing material such as rubber. Shift lever retainer 3 with plate 4 interposed
is fixed with bolts 15. Therefore,
The structure of the buff-full plate 4 will be explained with reference to FIGS. 2 to 4. The buff-full plate 4 has insertion holes 5 for bolts 15 for fixing the retainer 3 to the housing 1 on its outer periphery. A plurality of pieces (six pieces) are formed along the line. A cylindrical portion 6 is formed around each of these bolt insertion holes 5, and this is a structure for completely elastically supporting (full floating support) the retainer 3 with respect to the housing 1, as will be described later. In addition, in this Batsuful plate 4, with respect to the above-mentioned retainer 3,
As is well known, an opening 7 through which a shift lever housing (not shown) is inserted, which connects a shift lever (not shown) supported on a spherical surface so as to enable shift and select operations and a shift and select lever shaft (not shown) in an interlocking manner. It is formed. The opening 7 receives droplets of lubricating oil splashed up by, for example, a speedometer drive gear (not shown) rotating inside the housing 1, and prevents the oil droplets from exiting to the retainer 3 side. Oil guards 8 and 9 for this purpose are each integrally formed.

Now, on the bottom surface of the Batsuful plate 4, there is a third
As is clear from FIG. 4, a fitting surface 10 that is fitted into the inner circumference of the opening 2 of the housing 1 is formed continuously over the entire circumference of the buttful plate 4. . Further, a shielding wall 11 is formed further inward of this fitting surface 10, and is also continuous over the entire circumference of the buff-full plate 4. That is, this fitting surface 10 is formed at a position adjacent to the outer side of the shielding wall 11, and the buttful plate 4 is interposed between the housing 1 and the retainer 3 as described above, and this retainer 3 is fixed to the housing 1 side with bolts 15, the above-mentioned fitting surface 10 is located inside the opening 2 of the housing 1, as is clear from FIG. 5, which is a partially enlarged view of FIG. Contact with the circumferential surface over its entire circumference. As a result, it is possible to suppress the buff-full plate 4 from moving (shifting) in the front-rear, left-right directions with respect to the housing 1 during a speed change operation using a shift lever (not shown).

Moreover, the above-mentioned shielding wall 11 connects the mutual joint surface 16 between the upper surface of the housing 1 and the buttful plate 4,
A pocket 17 is located between the housing 1 and the inner surface 1a of the extension housing 1 to protect it from splashes of lubricating oil inside the housing 1.
is configured. In other words, this pocket 17 is also constructed around the entire circumference of the opening 2 of the housing 1, and at the bottom of this pocket 17,
Similarly, an oil passage 18 communicating with the inside of the housing 1 is formed around the entire circumference thereof. However, the cross-sectional area of this oil passage 18 is set within a range in which the lubricating oil does not cause capillary action. Further, this pocket 17 has a large number of air vent holes 12 opened on the upper surface of the buff-full plate 4, and the inside of this pocket 17 is opened to the atmosphere. Note that the opening portion of each air vent hole 12 on the upper surface of the baffle plate 4 is located within a groove 13 continuously formed on the upper surface of this plate 4.
Furthermore, a weir 14 that continues along the groove 13 is integrally formed on the upper surface of the plate 4. This groove 1
3 and the weir 14 are the opening 7 of the full plate 4.
This is to prevent the oil splashing out from flowing to the retainer 3, but since the opening 7 has the oil guards 8 and 9 mentioned above, there is almost no possibility that the oil will splash out. There is no such thing. However, in case there is any oil that has passed through the oil guards 8 and 9, the above-mentioned weir 14
The oil that has passed over this weir 14 is caught by the groove 13. The oil received in the groove 13 is returned into the extension housing 1 through the air vent hole 12.

Note that when the buttful plate 4 is interposed between the housing 1 and the retainer 3 and assembled, there is a buttful between the bolt 15 that fixes the retainer 3 to the housing 1 and the inner periphery of the bolt hole of the retainer 3. The cylindrical portion 6 of the plate 4 is located there (see FIG. 5), and the retainer 3 is supported in a fully floating state with no metal contact parts.

In the above configuration, the lubricating oil droplets splashed up inside the extension housing 1 are caught by the shielding wall 11, and the oil droplets are sent to the corner near the joint surface 16 between the buttful plate 4 and the housing 1. Direct adhesion to the parts is prevented. The oil droplets temporarily adhere to the lower part of the shielding wall 11, that is, near the oil passage 18 of the pocket 17, but immediately fall off due to vibrations or the like. Further, oil adhering near the oil passage 18 does not enter the pocket 17 due to capillary action, and oil that has directly jumped into the pocket 17 is immediately discharged from the passage 18. This prevents the oil from reaching the vicinity of the joint surface 16 and prevents the oil from seeping out to the outside due to capillary action from the joint surface 16. This allows the tightening margin of the buff-full plate 4 by the bolts 15 to be maintained in a state suitable for enhancing the vibration isolation effect between the housing 1 and the retainer 3.

As described above, the present invention forms a shielding wall integrally with the buttful plate to protect the joint surface between the periphery of the opening of the extension housing and the buttful plate from splashes of lubricating oil in the extension housing, and A pocket is formed by leaving a predetermined distance between this shielding wall and the inner surface of the extension housing, and the lower part of this pocket and the inside of the extension housing are communicated with each other through an oil passage. This prevents droplets of lubricating oil inside the housing from directly adhering to the joint surface between the housing and the buttful plate, and prevents oil from flowing from the joint surface by capillary action without having to set a large tightening margin for the buttful plate. This prevents oil leakage from the shift lever retainer portion without reducing the vibration-proofing effect of the bump-full plate.

Furthermore, the present invention forms a fitting surface that is fitted to the inner periphery of the opening of the extension housing at a position adjacent to the outer side of the shielding wall so as to be in contact with the entire periphery of the opening of the extension housing. This improves the positioning of the buff-full plate, and prevents the buff-full plate from being displaced with respect to the extension housing due to elastic deformation or the like during a shift operation or the like. This has the advantage that the pocket and oil passage formed between the shielding wall and the inner surface of the extension housing are always maintained in a proper state, and the oil leakage function is further improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. FIG. 1 is a sectional view showing the attachment part of the shift lever retainer to the extension housing, FIG. 2 is a plan view of the buttful plate, and FIG.
4 is an external perspective view of the buff-full plate seen from the right side of FIG. 2, and FIG. 5 is an enlarged sectional view of a part of FIG. 1. 1... Extension housing, 2... Top opening, 3... Shift lever retainer, 4...
... Boundful plate, 10... Fitting surface, 11...
Shielding wall, 12...Air vent hole, 16...Joint surface, 1
7...Pocket, 18...Oil passage.

Claims (1)

[Scope of utility model registration request] In a type in which a buttful plate made of a vibration isolating material is interposed between an opening formed on the upper surface of the extension housing and a shift lever retainer fixed therein, the extension housing is attached to the buttful plate. A shielding wall that protects the joint surface between the periphery of the opening of the housing and the buttful plate from splashes of lubricating oil in the extension housing is integrally formed, and an opening of the extension housing is formed adjacent to the outside of this shielding wall. A fitting surface is formed that is fitted to the inner surface of the extension housing so as to be in contact with the entire circumference thereof, and by positioning the buttful plate by this fitting surface, the shielding wall and the inner surface of the extension housing are connected. An oil baffle for a gear transmission, characterized in that a pocket is formed with a predetermined interval between the pockets, and the lower part of the pocket communicates with the inside of an extension housing through an oil passage.