JPH0442603Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a column shift type, and a predetermined forward shift position (usually the 5th shift position) and reverse shift position are This relates to shift operation mechanisms that are set to opposing shift patterns.

(Prior art) Generally, in a direct control type gear shift operation mechanism such as a floor shift type,
For example, when returning from the 5th shift position to the neutral position, an erroneous operation prevention device is provided to prevent overshifting beyond the neutral position to the reverse shift position. 52−20635
Publication No.). On the other hand, in a column shift type speed change operation mechanism, shift and selection operations are performed by rotating the control shaft disposed along the steering column around its axis and pushing and pulling it in the axial direction. Each operation is individually transmitted to the gear transmission through the shift system and select system control links. Because of its structure, this column shift type speed change operation mechanism is not provided with an erroneous operation prevention device like the above-mentioned direct control type speed change operation mechanism.

(Problem to be solved by the invention) In the conventional column shift type shift operation mechanism, when returning from the 5th shift position to the neutral position, the shift operation mechanism accidentally goes beyond the neutral position and shifts to the reverse shift position. It may be overshifted towards Shion,
As a result, there was a risk that abnormal noises such as gear noise would occur and the gears would be damaged.

(Means for Solving the Problems) In order to solve the above problems, the column shift type speed change operation mechanism of the present invention is configured as follows.

That is, as is clear from FIGS. 1 and 2, the control shaft 4 is arranged so as to be able to perform a shift operation around its axis and a selection operation in the axial direction. The shift positions are set to opposite shift patterns via mutual neutral positions RN.

An interlocking arm 16 is fixed to the control shaft 4 so as to be able to rotate around the axis and move in the axial direction together with the shaft 4 by the shift operation and the selection operation, and an interlocking arm 16 that supports the control shaft 4. The stopper shaft 18 is arranged substantially parallel to the control shaft 4 with respect to the member that is in contact with the interlocking arm 16 when the control shaft 4 is selectively operated toward the neutral position RN. within the range where the control shaft 4 contacts the interlocking arm 16 and returns to the neutral position RN when the control shaft 4 is shifted from both shift positions to the neutral position RN. The stopper 17 is rotatably provided on the stopper shaft 18, and springs 23 and 21 are provided to hold the stopper 17 at a position where it comes into contact with the interlocking arm 16 during the shift operation and selection operation, respectively.

(Function) According to the configuration, when the control shaft 4 is selectively operated toward the neutral position RN, the stopper 17 is moved toward the interlocking arm 1.
6 and moves in the same direction, and this selection operation and subsequent shift operation are performed without any trouble as before. and control shaft 4
When the interlocking arm 16 is shifted from either of the two shift positions to the neutral position RN, the interlocking arm 16 is regulated by the stopper 17 when it returns to the neutral position RN. Therefore, the control shaft 4 is always at the neutral position RN and movement in the shift direction is prevented. therefore being shifted directly from a forward shift position to a reverse shift position;
Or, conversely, a direct shift from a reverse shift position to a forward shift position is prevented.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

First, Fig. 1 is a cross-sectional view of the main parts of the gear shift operating mechanism, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a perspective view of the main parts of a column shift type gear shift operating mechanism. The control shaft 4 is arranged along a steering column (not shown), and rotates around its axis in conjunction with the shift and select operation of the shift lever 14 provided at the upper end of the control shaft 4, as shown in FIG. It is also possible to push and pull in the axial direction. In other words, as shown in FIG. 1, this control shaft 4 is supported by a bearing 5 so as to be rotatable around its axis and movable in the axial direction with respect to a lower bracket 2 fixed to a column hole cover 1 with bolts 3. has been done.

A boss portion 7 of a control shift lever 6 is fixed to the lower end of the control shaft 4 so as to operate together with the control shaft 4. Further, a control select lever 9 is provided at the tip of the arm portion 2a of the lower bracket 2.
is rotatably mounted by a shaft 10. A pin 11 formed on a portion of the control select lever 9 is engaged with a groove 8 of a boss portion 7 of the control shift lever 6. Note that the control shift lever 6 and the control select lever 9 are equipped with a shifting rod 12 and a selecting rod 1.
3 are individually connected by connectors such as rod sieves.

Now, when the control shaft 4 is rotated about its axis by a shift operation of the shift lever 14, the control shift lever 6 is rotated together with the control shaft 4. In conjunction with this, the shifting rod 12 is pushed or pulled in its axial direction, and the shift operation is transmitted to the transmission side through a shift system control link (not shown). Further, when the control shaft 4 is pushed or pulled along its axis by the selection operation of the shift lever 14, the boss portion 7 of the control shift lever 6 moves at this time to engage the groove 8. pin 1
1 through the control select lever 9 above.
is rotated relative to the arm portion 2a of the lower bracket 2. As the control select lever 9 rotates, the selecting rod 13 is pushed or pulled in its axial direction, and the select operation is transmitted to the transmission through a select system control link (not shown).

The shift pattern of the speed change operation mechanism is set as shown in FIG. In other words, the 1st shift position and the 2nd shift position are opposite to each other via their neutral position LN, and the same
The 3rd shift position and 4th shift position are opposite through their neutral position HN, and the 5th shift position and reverse Rev
Shift position is its neutral position RN
are facing each other through.

Now, on the axis of the control shaft 4 near the column hole cover 1, there is an interlocking arm 1.
6 is fixed by means such as welding. On the other hand, a shaft 18 is erected on the column hole cover 1 side. A lever-shaped stopper 17 is attached to the shaft 18 by a bush 19 so as to be rotatable about the shaft 18 and slidable along the shaft 18 in the vertical direction in FIG. 1.

Stopper 1 on the axis of the shaft 18
A coil spring 21 is assembled between the washer 20 provided on the lower surface of the column hole cover 7 and the column hole cover 1. This coil spring 21 always acts to push up the stopper 17 to the state shown in FIG. Also, the first stopper 17
A return spring 23 is hung between the engagement hole 17a formed at the left end in the figures and FIG. 2 and a hanger 22 fixed to the column hole cover 1 by means such as spot welding. The spring 23 holds the stopper 17 in the neutral position shown in FIG. 2 with respect to its rotating direction.

The stopper 17 in the state shown in FIGS. 1 and 2 above selects the control shaft 4 to the neutral position RN between the 5th shift position and the reverse shift position in the shift pattern shown in FIG. 4. This corresponds to the position of the interlocking arm 16 at the time, and is set so as to interfere with the interlocking arm 16. Note that this stopper 17 is located within a notch 24a of a regulating member 24 fixed to the upper surface of the column hole cover 1 by means such as spot welding. Therefore, the stopper 17
Only in the range of the notch 24a of 4, the shaft 1
It is rotatable around 8.

In the shift operation mechanism configured as above,
The shift lever 14 is now shown in FIGS. 1 and 2.
It is assumed that a selection operation is performed from a neutral position HN between the 3rd shift position and the 4th shift position to a neutral position RN between the 5th shift position and the reverse shift position.
At this time, the control shaft 4 is pushed in its axial direction as shown in FIG. As a result, the interlocking arm 16 moving together with the control shaft 4 comes into contact with the stopper 17, and pushes the stopper 17 down against the elasticity of the coil spring 21 into the state shown in FIG.

Next, move the shift lever 14 from the above state.
When the shift operation is performed to the 5th shift position, the control shaft 4 rotates together with the interlocking arm 16 in the directions shown in FIGS. 6 and 7. This causes the interlocking arm 16 to move to the stopper 1.
7, this stopper 17 is pushed up again to its original position by the elasticity of the coil spring 21, as shown in FIG.

Thereafter, when the shift lever 14 is operated to return to the above-mentioned neutral position RN, the control shaft 4 rotates together with the above-mentioned interlocking arm 16 in the original direction again. At this time, the interlocking arm 16
is the stopper 17 pushed up to its original position by the coil spring 21 as described above.
At this time, the stopper 17 is rotated about the axis of the shaft 18 as shown in FIG. The amount of rotation of the stopper 17 is regulated by the stopper 17 coming into contact with one edge of the notch 24a in the regulating member 24. Therefore, the interlocking arm 16 and the control shaft 4
Further rotation is also prevented. When the rotation in the shift operation direction is thus prevented through the stopper 17 and the interlocking arm 16, the control shaft 4 corresponds to the above-mentioned neutral position RN. Therefore, this neutral position RN
This prevents a situation in which the control shaft 4 is overshifted to the above-mentioned reverse shift position.

From the shift stopper state shown in FIG. 8, move the shift lever 14 to, for example, the 3rd shift position and
Neutral position HN between shift position
By performing a select operation to return the control shaft 4 to the upper position, the control shaft 4 is pulled upward. As a result, the above-mentioned interlocking arm 16 also moves upward,
The stopper 17 is returned to its original neutral position by the elasticity of the return spring 23.

The amount of rotation of the stopper 17 can also be restricted by omitting the restriction member 24 and using a support structure between the shaft 18 and the stopper 17 instead. In this case, a spring function corresponding to the return spring 23 may also be provided between the shaft 18 and the stopper 17. Furthermore, the stopper 17 is moved to the shaft 18.
The shape of the interference part between the stopper 17 and the interlocking arm 16 allows the control shaft 4 to be moved to the neutral position.
It is also possible to configure it to be regulated by RN.

(Effects of the invention) As described above, according to the invention, the selection operation between the predetermined forward shift position and reverse shift position to the neutral position and the subsequent shift operation can be performed without any trouble as before, and furthermore, When shifting from any shift position back to the neutral position, the stopper always prevents movement in the shift direction at this neutral position. Therefore, erroneous overshifting from a forward shift position to a reverse shift position or from a reverse shift position to a forward shift position is prevented, and inconveniences such as gear noise and gear damage due to these erroneous operations are prevented. is resolved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional view showing the main parts of a column shift type gear shift operation function; FIG. 2 is a plan view of FIG. 1; and FIG. 3 is a column shift type gear shift operation. FIG. 4 is a shift pattern diagram of the shift operation mechanism; FIG. 5 is a state in which the gear shift operation mechanism has been selected from the state shown in FIG. 1 to the neutral position on the reverse shift position side. FIG. 6 is a schematic diagram showing a state in which the shift operation is performed from the state shown in FIG. 5 to the 5th shift position side, and FIG. 7 is a schematic diagram showing a state shown in FIG. FIG. 8 is a plan view when the state shown in FIG. 7 is returned to the neutral position again. 4...Control shaft, 16...Interlocking arm, 17...Stopper.

Claims (1)

[Claims for Utility Model Registration] A control shaft is arranged to allow shift operations around its axis and selection operations in the axial direction, and furthermore, a predetermined forward shift position and a predetermined reverse shift position are arranged through mutual neutral positions. In a column shift type speed change operation mechanism set in a shift pattern facing each other, the control shaft can be rotated around an axis and moved in the axial direction together with the shaft by the shift operation and select operation. a fixed interlocking arm; a stopper shaft disposed substantially parallel to the control shaft with respect to the member supporting the control shaft; and when the control shaft is selectively operated toward the neutral position. when the control shaft is shifted from both shift positions to the neutral position, and when the control shaft is shifted from both shift positions to the neutral position. A column in a gear transmission, comprising a stopper provided on the stopper shaft so as to be rotatable within a return range, and a spring that holds the stopper at a position where it contacts the interlocking arm during the shift operation and select operation. Shift type speed change operation mechanism.