JPH10132074A - Shaft for shift fork moving of transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaft for shift fork moving of a transmission which can carry out the combining work of a shaft and a yoke easily. SOLUTION: A shaft in order to move a shift fork in a transmission interlocking with a shift lever, is composed of a shaft part 1 which consists of a shaft 11, and a head 12 provided at one end side of the shaft 11, and having a serration in the axial direction of the outer peripheral surface; and a yoke 2 which consists of a tube 21 having a serration with the effective radius smaller than the effective radius of the head serration, and a connection 22 provided at one end side of the tube 21, and to combine the shift lever. And this shaft is composed by pressing in the head 12 of the shaft part 1 into the tube 21 of the yoke 2 from the end at the opposite side of the connection 22, and inserting a pin 3 to a pin hole 31 opened by penetrating the tube 21 and the head 12, so as to combine the shaft part 1 and the yoke 2 allowable to disassemble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift fork moving shaft of a transmission for moving a shift fork in a transmission in conjunction with a shift lever.

[0002]

2. Description of the Related Art As shown in FIG. 10, an operation mechanism of a transmission a moves a shift fork c in a transmission a by operating a shift lever b.
This is a series of mechanisms for meshing gears. The mechanism shown in FIG. 10 is called a direct control system, and is configured to select shift forks c1 to c3 via a shift fork moving shaft d by operating a shift lever b to engage with gears. ing.

[0003]

FIGS. 11 to 13 show shift forks used in the direct control system.
5 shows a shaft d for moving the workpiece. A yoke e is connected to one end of the shaft d, and is connected to the shift lever b via the yoke e. The yoke e is a jig having a U-shaped cross section, and a connecting cylinder f having a through hole is integrally joined. The shaft d is integrally connected to the yoke e by inserting one end into the connecting tube f and inserting a pin h into a through hole g crossing the connecting tube f and the shaft d.

However, conventionally, since the through-hole g is separately formed in the connecting cylinder f and the shaft d, it is necessary to align the through-hole g at the time of connecting the through-holes g, and the connecting operation is complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a shaft for moving a shift fork of a transmission which can easily perform an operation of connecting a shaft portion and a yoke portion. The purpose is to do.

[0006]

According to a first aspect of the present invention, there is provided a shaft for moving a shift fork in a transmission in conjunction with a shift lever. A shaft portion provided on one end side of the portion and having a head having a selection in the axial direction of the outer peripheral surface, and a selection having an effective diameter smaller than the effective diameter of the head selection on the inner peripheral surface. A yoke portion comprising an axially extending cylindrical portion and a connecting portion provided at one end of the cylindrical portion for connecting the shift lever, wherein the head of the shaft portion is formed of the yoke portion. The pin is pressed into the cylindrical portion from the end opposite to the connecting portion, and a pin is inserted into a pin hole formed through the cylindrical portion and the head, and the shaft portion and the yaw are inserted.
A shift fork moving shaft of the transmission, wherein the shaft is configured to be removably coupled to the transmission.

According to a second aspect of the present invention, in the transmission fork moving shaft according to the first aspect, no selection is provided on an inner peripheral surface of the cylindrical portion of the yoke portion, and the cylindrical portion is not provided. Select the inner diameter of the shaft head
A shaft for moving a shift fork of a transmission, wherein the shaft is formed so as to be smaller than a mountain diameter of the transmission and the head is press-fitted into a cylindrical portion.

According to a third aspect of the present invention, in the transmission fork moving shaft according to the first aspect, no selection is provided on an outer peripheral surface of a head of the shaft portion, and the outer diameter of the head is reduced. Selection of the cylinder part of the yoke part
A shaft for moving a shift fork of a transmission, wherein the shaft is formed so as to be larger than a mountain diameter of the transmission and the head is press-fitted into a cylindrical portion.

[0009] Further, claim 4 corresponds to claims 1 to 3 above.
Transmission shift fork according to any one of
In the shaft for moving the shaft, a concave portion or a convex portion for positioning is formed on the outer peripheral surface of the head of the shaft portion,
A shaft for moving a shift fork of a transmission, characterized in that a projection or a recess for positioning is formed on the inner peripheral surface of the cylindrical portion of the yoke portion so as to match the recess or the projection.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A shift fork moving shaft according to the present invention has a structure in which a shaft portion 1 and a yoke portion 2 are connected by pins 3 as shown in FIG. Shaft part 1
As shown in FIG. 2, a head portion 12 is provided on one end side of a shaft portion 11, and a selection 13 is formed in an axial direction of an outer peripheral surface thereof.

A step portion 14 having a slightly larger diameter than the head portion 12 is provided on the shaft portion 11 side of the head portion 12.
On the side, a flange portion 15 having a larger diameter than the step portion 14 is provided.

As shown in FIGS. 3 to 5, the yoke portion 2 connects a cylindrical portion 21 for connecting the head portion 12 of the shaft portion 1 to a shift lever provided at one end of the cylindrical portion 21. And a connecting portion 22.

The cylindrical portion 21 is formed by a burring method or the like.
The inner diameter of the cylindrical portion 21 is smaller than the outer diameter of the step portion 14 of the shaft portion 1, and the outer diameter of the cylindrical portion 21 is smaller than the step portion 1 of the shaft portion 1.
The thickness of the cylindrical portion 21 is set so as to be larger than the outer diameter of No. 4.

The cylindrical portion 21 is selected in the axial direction of its inner peripheral surface.
An application 21a is formed. The effective diameter (the intermediate diameter between the peak diameter and the valley diameter) of this selection 21a is the head 1 of the shaft portion 1.
2 is formed smaller than the effective diameter of the selection 13.

However, in determining the effective diameter of the selection 21a and the effective diameter of the selection 13, when the head 12 of the shaft 1 is inserted into the cylinder 21 of the yoke 2, Both can be fixed, and by applying an impact force in the axial direction to the shaft portion 1, a coupling force enough to separate the head portion 12 and the cylindrical portion 21 can be obtained. By the way,
The effective diameter of the section can be obtained from the following equation.

D = (z / 0.4π-1) h

D: effective diameter z: number of peaks h: height of peaks

The connecting portion 22 includes a bottom plate 22a that protrudes in the circumferential direction from a peripheral edge at one end of the cylindrical portion 21, and a bottom plate 22a.
It is formed in a substantially U-shaped cross section by two opposing connecting plates 22b which are raised at a right angle from. A connection hole 22c for connecting a shift lever is formed at a corresponding position of each connection plate 22b.

Next, the shaft 1 constructed as described above is used.
The structure of the connection between the yoke 2 and the yoke 2 will be described. First, as shown in FIG. 1, the head portion 12 of the shaft portion 1 is inserted into the cylinder portion 21 of the yoke portion 2, and the step portion 14 is formed at the end face of the cylinder portion 21 from the end opposite to the connecting portion 22. Push until it touches. With the head portion 12 and the cylindrical portion 21 fixed in this way, a pin hole 31 is opened by penetrating both with a drill or the like.

At this time, the shaft portion 11 of the shaft portion 1 also has
A fork mounting hole 16 is opened in a predetermined direction. Although not shown, a fork is attached to the fork attachment hole 16 via a pin.

Then, the pin 3 is inserted into the pin hole 31, and the shaft 1 and the yoke 2 are connected. Since the pin hole 31 can be opened and the pin 3 can be inserted in a state where the head portion 12 and the tubular portion 21 are fixedly connected as described above, the connecting operation can be easily performed.

In use, rubber boots 4
Is connected to the end face of the cylindrical portion 21 via a ring or the like and the flange portion 14.
Is installed between In addition, shaft part 1
When disassembling the yoke portion 2, the rubber boots 4 and the pin 3 are pulled out, and then the end of the shaft portion 1 is hit with a hammer or the like so that the head portion 12 can be easily moved from the cylindrical portion 21. Can be extracted. After the replacement of the parts, the shaft portion 1 and the yoke portion 2 can be combined and reused in the same manner as described above.

[0023]

[Other Embodiments] As another embodiment, no selection is provided on the inner peripheral surface of the cylindrical portion 21 of the yoke portion 2,
In addition, the inner diameter of the cylindrical portion 21 is selected by selecting the head 12 of the shaft portion 1.
It is also conceivable to form the head 12 into the cylindrical portion 21 by press-fitting it so as to be smaller than the diameter of the ridge 13.

On the contrary, the head 1 of the shaft 1
No selection is provided on the outer peripheral surface of the yoke 2, and the outer diameter of the head 12 is formed larger than the crest diameter of the selection of the cylinder 21 of the yoke 2, so that the head 12 is formed inside the cylinder 21. It is also conceivable to press-fit the structure.

As shown in FIGS. 6 and 7, a convex portion 15 (or concave portion) for positioning is formed on the outer peripheral surface of the head portion 12 of the shaft portion 1 and a cylindrical portion 21 of the yoke portion 2 is formed. A structure is also conceivable in which a concave portion 22d (or convex portion) for positioning that matches the convex portion 15 (or concave portion) is formed on the inner peripheral surface of the above. One or more projections or depressions are provided.

By adopting such a positioning structure, the pin holes 31 of the head 12 and the cylindrical portion 21 can be easily matched with each other at the time of reuse after disassembly, and the joining operation can be performed quickly.

Further, as shown in FIG. 8, if a separate washer 5 is mounted between the end face of the cylindrical portion 21 and the step portion 14, the end ring of the rubber boots 4 is connected to the washer and the flange. Since the cylindrical portion 21 can be sandwiched by the portion 15, the thickness of the cylindrical portion 21 can be reduced.

As shown in FIG. 9, a step 14 and a flange 15 are provided between the head 12 of the shaft 1 and the shaft 11.
Instead of providing the head portion 12 and the neck portion 18 having a smaller diameter than the shaft portion 11, a structure in which the end of the rubber boots 4 is attached to the recess of the neck lower portion 18 is also conceivable. In this case, easiness in processing the shaft portion 1 and reduction in cost can be achieved.

[0029]

As described above, according to the present invention, since a pin hole can be opened and a pin can be inserted in a state where the head and the tube are fixedly connected, the joint work between the shaft and the yoke can be performed. Easy to do.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a coupling state of a shaft portion and a yoke portion according to the present invention.

FIG. 2 is an explanatory view of a shaft portion of the present invention.

FIG. 3 is an explanatory view of a yoke part of the present invention.

FIG. 4 is an explanatory view of a yoke part of the present invention.

FIG. 5 is an explanatory view of a yoke part of the present invention.

FIG. 6 is an explanatory view of a positioning concave portion of the yoke portion.

FIG. 7 is an explanatory view of a positioning convex portion of a shaft portion.

FIG. 8 is an explanatory view of an embodiment incorporating a washer.

FIG. 9 is an explanatory view of an embodiment having a lower neck portion.

FIG. 10 is an explanatory view of a conventional technique.

FIG. 11 is an explanatory view of a conventional technique.

FIG. 12 is an explanatory diagram of a conventional technique.

FIG. 13 is an explanatory diagram of a conventional technique.

Continued on the front page (72) Inventor Tsutomu Niimi 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Takashi Umeda 2-20 Kawanami-cho, Atsuta-ku, Nagoya-shi, Aichi Aichi Machine Industry Co., Ltd. In company

Claims (4)

[Claims] 1. A shaft for moving a shift fork in a transmission in conjunction with a shift lever, comprising: a shaft, and a selection in an axial direction of an outer peripheral surface provided at one end of the shaft. A shaft portion having a head portion, a cylindrical portion having an effective diameter smaller than the effective diameter of the head portion in the axial direction of the inner peripheral surface, and a shift lever provided at one end of the cylindrical portion. A head portion of the shaft portion is press-fitted into a tube portion of the yoke portion from an end opposite to the connection portion, and a cylindrical portion is formed. A shaft for shifting a shift fork of a transmission, wherein a pin is inserted into a pin hole formed through the head and the head, and the shaft and the yoke are removably coupled. 2. The shift fork moving shaft of a transmission according to claim 1, wherein no selection is provided on the inner peripheral surface of the cylinder portion of the yoke portion, and the inner diameter of the cylinder portion is adjusted to the shaft portion. A shaft for moving a shift fork of a transmission, wherein the shaft is formed to be smaller than a mountain diameter of a selection of a head and the head is press-fitted into a cylindrical portion. 3. The shift fork moving shaft of a transmission according to claim 1, wherein no selection is provided on an outer peripheral surface of a head of the shaft portion, and an outer diameter of the head is smaller than that of the yoke portion. A shaft for moving a shift fork of a transmission, wherein the shaft is formed so as to be larger than a mountain diameter of a selection of the cylindrical portion, and the head is press-fitted into the cylindrical portion. 4. The shift fork moving shaft of a transmission according to claim 1, wherein a concave portion or a convex portion for positioning is formed on an outer peripheral surface of a head of said shaft portion, and A shift fork moving shaft for a transmission, wherein a positioning projection or a recess is formed on an inner peripheral surface of a cylindrical portion of the yoke portion so as to match the recess or the projection.