JPS605152Y2 - Manual transmission shift mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shift mechanism of a manual transmission in a vehicle such as an automobile, and particularly relates to a shift mechanism for a manual transmission in a vehicle such as an automobile.
A misshift in which the shift directions of the 5th forward gear or the 1st forward gear are on the same straight line, and the shift lever in the forward gear is prevented from being shifted directly to the reverse gear beyond the intermediate position. The present invention relates to a manual transmission shift mechanism equipped with a prevention device.

An object of the present invention is to provide a shift mechanism for a manual transmission that has a compact configuration of the above-mentioned misshift prevention device and can be implemented easily and inexpensively in existing manual transmissions.

An embodiment of the present invention will be described below based on the drawings.

1 and 2 partially show the shift mechanism of a manual transmission with 5 forward speeds and 1 reverse speed with a shift pattern as shown in FIG. 3.
A shift lever 10 is attached to a spherical seat 14 attached to a shift lever retainer 13 fixed to an extension housing 11 with bolts 12 so as to be tiltable and returnable to the position shown.

The lower end small ball portion 10a of the shift lever 10 is connected to the shift lever housing 16 via a bushing 15.
Front end of shift lever housing 16 (left end in Figure 2)
16a is fixed to the rear end of the intermediate shaft 17.

As is well known, the intermediate shaft 17 is supported rotatably and slidably in the axial direction by the extension housing 11, and a shift and select lever that selectively engages three shift heads is fixed to the tip. ing.

Therefore, in this embodiment, the shift lever 10, which is in the 5th forward gear, is placed on the left side of the rear end of the shift lever housing 16 (the left side in FIG. 1), and is shifted directly to the reverse gear beyond the intermediate position m. A misshift prevention device 20 is provided to prevent this.

The misshift prevention device 20 is a shift lever housing 1
6, a stepped plunger 22 provided opposite to this projection 21, and this plunger 22.
It consists of a positioning pin 23 that determines the position at the N position in FIG. 3, and a return spring 24 that returns the plunger 22 to its original position as shown.

The projection 21 is in the positional relationship shown in FIGS. 1 and 4 at the N position in FIG. 3.

The plunger 22 is assembled into a stepped inner hole 11a (the left end is closed by a plug 18) provided in the extension housing 11 so as to be rotatable and slidable in the axial direction (reduced into the stepped inner hole 11a). The right end thereof protrudes into the extension housing 11 from the stepped inner hole 11a.

This plunger 22 has a protruding end 22a as shown in FIGS.
It has a notch 22b shown in the figure, and a groove 22C shown in FIGS. 1, 5, and 6 in the center, and the notch 2
2b restricts movement of the protrusion 21 in the shift direction when engaged with the protrusion 21.

Note that notches 22d and 22d are provided in the outer periphery of the plunger 22 in the axial direction as air passages.

The positioning pin 23 passes through the groove 22c of the plunger 22 and is fitted into the extension housing 11.
It engages with the groove 22C to restrict the rotation of the plunger 22 in the clockwise direction shown in FIG. S Allowed.

This iS is slightly larger than the amount by which the plunger 22 retracts due to contact with the protrusion 21 when the shift lever 10 at the neutral position N shown in the figure is tilted (select operation) to the intermediate position m.

The return spring 24 is a coil spring, and has one end engaged with the positioning pin 23 and the other end engaged with the large diameter portion 22e of the plunger 22, thereby urging the plunger 22 to the right in FIG. 5. It is urged clockwise in the drawing to return to the original position shown in the drawing.

In this embodiment configured as described above, when the shift lever 10 at the neutral position N shown in the figure is operated from the first forward gear to the fourth forward gear in the shift pattern shown in FIG. moves away from the plunger 22, the misshift prevention device 20 has no effect, and the shift lever 10 can be operated in the same way.

By the way, the shift lever in the neutral position N shown in the figure
10 to the intermediate position m of 5-R, the protrusion 21 comes into contact with the protruding end of the plunger 22, and the plunger 22
is pushed in as shown by the imaginary line in FIG.

When the shift lever 10 is operated to shift to the fifth forward speed in this state, the protrusion 21 is disengaged from the protruding end of the plunger 22, and the plunger 22 is returned to its original position by the action of the return spring 24.

After this, when an attempt is made to shift the shift lever 10 from the fifth forward gear to the reverse gear, the protrusion 21 engages with the protruding end 2a of the plunger 22 in the original position as shown in FIG. 7 before reaching the intermediate position m. When the plunger 22
Rotate counterclockwise as shown in the diagram.

Thus, when the shift lever 10 slightly exceeds the intermediate position m, the protrusion 21 aligns with the notch 22d of the plunger 22, as shown in FIG. blocked.

If you want to shift the shift lever 10 to the reverse gear, operate the shift lever 10 from the intermediate position m toward the neutral position N, and then operate the shift lever 10 from the intermediate position m to the reverse gear. When moving from position m to neutral position N, the engagement between protrusion 21 and notch 22d is disengaged, and plunger 22 returns to its original position by the action of return spring 24 as shown in FIG. 21 comes into contact with the protruding end of the plunger 22, and the plunger 22 is pushed in. Further, when moving toward the reverse gear, the protrusion 21 slides while being in contact with the protruding end of the plunger 22, as shown in FIG. is shifted to reverse gear.

FIG. 12 shows a modification of the invention in which a return spring 124 is provided within the extension housing 111.

The return spring 124 is attached with one end locked to the extension housing 111 and the other end locked to the plunger 122.

In this embodiment, a ring 125 is fixed to the plunger 122 in order to effectively transmit the axial biasing force of the spring 124 to the plunger 122.

Further, in this embodiment, the right end surface of the plunger 122 is processed into a spherical surface in order to improve the slidability of the protrusion 21 of the shift lever housing 16.

The rest of the structure is substantially the same as that of the above embodiment, and the operation is also substantially the same as that of the above embodiment, so a description thereof will be omitted.

The above explanation is based on one embodiment of the present invention,
The present invention is not limited to the above-mentioned embodiments, but can be implemented by appropriately changing the shift mechanism of various manual transmissions in which the shift directions of the reverse gear and the forward gear are on the same straight line.

Furthermore, in each of the above embodiments, the misshift prevention device, which constitutes the main part of the present invention, is placed on one side of the shift lever housing, but this misshift prevention device is also placed on one side of the shift and select lever. It's something you get.

In short, in this invention, the misshift prevention device is
The shift lever housing has a projection integrally provided on a moving member such as a shift lever housing, and a notch provided opposite to the projection and at a projecting end that restricts movement of the projection in the shift direction by engagement with the projection. a plunger that has a groove in the center and is movable and rotatable in the axial direction in the select direction; a positioning pin that is fitted into the groove of the plunger and defines the original position of the plunger; Its main structural feature is that it is constructed with a return spring that urges the plunger in the axial and rotational directions to return the plunger to its original position.This makes the misshift prevention device compact and prevents misshifts. A shift arrangement including the device can be easily and inexpensively implemented in existing manual transmissions.

In addition, in this invention, the plunger retracts during the selection operation to the intermediate position, returns to its original position when the shift operation is performed to the forward gear, and the plunger retracts when the shift operation from the forward gear to the reverse gear is performed beyond the intermediate position. Since it is rotatable, the space occupied by the misshift prevention device is small, and it can be easily implemented in a shift mechanism of a small manual transmission without changing its basic configuration.

[Brief explanation of drawings]

Fig. 1 is a partial vertical cross-sectional rear view showing one embodiment of the present invention;
The figure is a vertical side view of the same part, Figure 3 is a shift pattern diagram of the embodiment shown in Figures 1 and 2, and Figure 4 is the IV of Figure 1.
- A vertical cross-sectional view along line IV, Figure 5 is a vertical cross-sectional view along line ■-■ in Figure 1, Figure 6 is a cross-sectional view along line VI-VI in Figure 5, Figures 8, 9, 10 and 11
The figure is an explanatory view of the operation, and FIG. 12 is a partial vertical cross-sectional rear view showing a modification. Explanation of symbols, 10...Shift lever-120...
...Misshift prevention device, 21...Protrusion,
22...Plunger, 22a...Protruding end, 22b...Notch, 22c...Groove, 23...Positioning pin, 24 ...Return spring.

Claims (1)

[Scope of utility model registration request] A manual transmission equipped with a misshift prevention device in which the shift directions of the reverse gear and the forward gear are on the same straight line, and the shift lever in the forward gear is prevented from being directly shifted to the reverse gear beyond an intermediate position. In the shift mechanism, the misshift prevention device includes a protrusion that is integrally provided on a moving member such as a shift lever housing that is connected to the shift lever and is moved by a shift operation and a selection operation of the shift lever, and a protrusion that faces the protrusion. The projecting end portion thereof has a notch that restricts movement of the projection in the shift direction by engagement with the projection, and has a groove in the center so that it is movable and rotatable in the axial direction in the selection direction. a plunger, a positioning pin that is fitted into the groove of the plunger and defines the original position of the plunger, and a return that urges the plunger in the axial direction and rotational direction to return the plunger to its original position. When the shift lever is selected to the intermediate position, the protrusion of the moving member and the tip of the plunger come into contact with each other, causing the plunger in its original position to retract, thereby shifting the shift lever to the forward gear. During the operation, the protrusion and the plunger come out of contact and the plunger returns to its original position, and when the shift lever is shifted from the forward gear to the intermediate position and toward the reverse gear, the protrusion and the plunger disengage. The plunger is rotated when the protruding end is engaged, and the rotation of the plunger is restricted by the engagement between the protrusion and the notch, thereby preventing misshifting of the shift lever to the reverse gear. A manual transmission shift mechanism characterized by: