JPH08303585A - Shifting maloperation preventing device - Google Patents

Abstract

PURPOSE: To prevent a select lever from carelessly entering N-range, in an automobile loading an automatic transmission. CONSTITUTION: A vessel 9 filled with fluid 11 and having a one-way valve 16 and an orifice 14 in the interior is provided on the side of a detent plate 7, and the vessel 9 is provided with an actuator 20 and a stopper pin 21 of which either only projects on the select lever 1 side. The stopper pin 21 is positioned so that it is brought into contact with a detent pin 5 when a detent button is not pushed at projecting and hence movement of the select lever 1 is regulated. In addition, the stopper pin 21 is not instantaneously drawn in by the one-way valve 16 and the orifice 14, and it takes a some time to be drawn in. By this constitution, when shifting is changed from L-range or Z-range to D range, the select lever is prevented from crossing over the D-range by execessive energy and entering N-range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear shift erroneous operation preventing device applied to an automobile equipped with an automatic transmission.

[0002]

2. Description of the Related Art In an automobile equipped with an automatic transmission, a driver operates a select lever to select a shift mode. The range of the select lever is the P (parking) range when the select lever is pushed to the frontmost position.
Next is the R (reverse) range, then the N (neutral) range, and the front is the D (drive) range, then 2
It is common to provide the (second) range and the L (low) range at the end in this order. In order to prevent the car from moving carelessly, the detent button provided on the knob of the select lever must be pressed to shift to the R range, but the operation cannot be performed from the L range or the 2 range. It is not necessary to press the detent button to switch to the range, and it is not necessary to press the detent button to return from the D range to the N range.

Therefore, when trying to switch the select lever currently in the L range or the 2 range to the D range, there is no problem if the select lever is operated with an appropriate force, but if it is operated more vigorously than usual. In this case, excessive force may pass the D range and move to the N range. When the select lever is in the N range, the power from the engine to the wheels will be cut off.
At that time, if the accelerator pedal is depressed, a so-called idling will occur and the engine will be rotated at a high speed with no load. Further, when the range is returned to the D range, the force applied to the clutch increases.

Therefore, as a solution to this problem, there is one described in Japanese Utility Model Laid-Open No. 3-112164. In this publication, an electrically controlled actuator and a shaft projecting from the actuator are provided so that the select lever does not enter the N range when the shaft projects. Therefore, an electric control circuit is required, and electric wiring to an actuator or the like is required.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and an erroneous gear shift operation preventing device capable of obtaining the same effect by utilizing fluid pressure can be obtained without using an electric circuit. It is the one we are trying to provide.

[0006]

As a means for solving the above problems, the present invention is a gear shift operation in which a detent pin provided on a select lever is moved in the longitudinal direction of the select lever by pressing a detent button. In the device, a container provided with a fluid and filled with a one-way valve and an orifice therein is provided on a side portion of the detent plate, and the container is provided with an actuator and a stopper pin, one of which projects on the select lever side, It is characterized in that the stopper pin is positioned so as to project at a position that prevents the select lever from entering the neutral position when the detent button is not pressed.

[0007]

With this structure, the fluid filled in the container moves between the two chambers in response to changes in the positions of the actuator and the stopper pin with respect to the container. At the time of this movement, since the one-way valve and the orifice are provided in the partition wall, smooth flow occurs when moving from one chamber to the other chamber, but there is a time delay when flowing in the opposite direction. Become. Therefore, the stopper pin,
Position the stopper pin so that it will take some time for the stopper pin to retract when you try to move it from the D range to the N range.

If the actuator is pushed into the container by the select lever when the select lever is in the 2 range or L range, the actuator projects from the container when the select lever is switched to the D range. Due to this protrusion, the pressure of the fluid in the chamber where the actuator is provided decreases, so that the fluid moves from the chamber where the stopper pin is provided. This movement of the fluid causes the stopper pin to retract into the container,
On the other hand, due to the action of the valve and the orifice, it takes time to move the fluid. As a result, the stopper pin blocks the select lever from entering the N range for a predetermined time. By gently operating the select lever, the stopper pin retracts as the movement of the fluid is completed, so that the N range can be entered. When you want to switch quickly, push the detent button on the knob to retract the detent pin,
It is enough to shift the position with the stopper pin.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a select lever, which is supported at its lower end so as to be tiltable in the left-right direction in FIG. A knob 3 is attached to the upper end of the select lever 1, and a detent button 4 projects from the side of the knob 3 as shown in FIG. Although not shown, the select lever 1 is hollow, and a rod is fitted inside so as to be movable in the axial direction. Then, when the detent button 4 is pressed, this rod moves, so that the detent pin 5 protruding laterally from the hole 1a (see FIGS. 1 and 3) provided in the middle portion of the select lever 1 is moved in the longitudinal direction of the select lever 1. Has become. The select lever 1 is provided with a bracket 6 and is coupled to a transmission (not shown).

A detent plate 7 is provided on a side portion of the select lever 1, and the detent plate 7 is provided with a detent hole 8 as shown in an enlarged manner in FIG. The detent hole 8 is well known in the art, and the lower side has a gentle curved surface, while the upper side has an uneven shape, so that the detent pin 5 engages at a position corresponding to the P range to the L range. ing.

The detent button 4 is urged by an elastic force of a spring (not shown) so that the detent pin 5 returns upward when the detent button 5 is not pushed, so that the detent pin 5 is located at a high position on the upper side of the detent hole 8. In some cases, it is impossible to move to another range without pressing the detent button 4 and retracting the detent pin 5. That is, between the P range and the R range, the N range to the R range, the D range to the 2 range, and the 2 range to the L range cannot be switched without pressing the detent button 4.

As shown in FIG. 4, a container 9 is provided on the side of the detent plate 7 and is fixed to the detent plate 7 with bolts 10. The container 9 is filled with a fluid 11 such as oil having an appropriate viscosity. A partition wall 12 is provided inside the container 9 to divide the inside of the container 9 into a chamber A and a chamber B. The partition wall 12 has a tapered hole 13 and an orifice 14. Ball 15 in hole 13
Are arranged so as to be seated, and these form a one-way valve 16. Reference numeral 17 is a protrusion that prevents the ball 15 from falling off.

Cylindrical holes 18 and 19 are provided on the surface of the container 9 on the detent plate 7 side. An actuator 20 is fitted in the hole 18 on the chamber A side, and a stopper pin 21 is slidably fitted in the hole 19 on the chamber B side, that is, so as to project toward the select lever 1 side. Due to the structure described below, the actuator 20 and the stopper pin 21 do not simultaneously project, but selectively project.

As shown in the figure, both the actuator 20 and the stopper pin 21 are cup-shaped with one end open, and the flanges 20a, 21a provided in the opening are provided.
The engagement with the cylindrical portions of the holes 18 and 19 prevents the retaining. A spring 22 is interposed in a compressed state between the bottom of the actuator 20 and the bottom of the container 9, and always applies a force to the actuator 20 in a protruding direction.

The holes 18 and 19 are provided at positions sandwiching the partition wall 12 as shown in FIG. 4, the actuator 20 projecting from the hole 18 is at the positions of the 2 range and the L range, and the stopper pin 21. Is located in the N range (see FIG. 3). As shown in FIG. 4, the actuator 20
Is longer than the stopper pin 22, and the tip of the stopper pin 22 is within the movement locus of the select lever 1 when protruding. As a result, when the select lever 1 is moved to the right from the state of FIG. 4, the actuator 20 is pushed down. A slope portion 20a for this purpose is formed at the tip of the actuator 20.

As shown in FIG. 3, the stopper pin 21 has an oval shape, and the detent pin 5 which moves in the longitudinal direction of the select lever 1 along the hole 1a of the select lever 1.
However, when the detent button 4 (see FIG. 2) is not pressed and is in the upper position without descending, the detent pin 5 (and thus the select lever 1) moves to the right (to the N mode, R mode, and P mode). The movement of the) is regulated.

The operation will be described. The state shown in FIGS. 3 and 4 is where the select lever 1 is in the D range. In this state, the actuator 20 is not pushed inward of the container 9 by the select lever 1, so that the elastic force of the spring 22 causes the actuator 20 to sufficiently project. The protrusion of the actuator 20 causes the fluid 11 inside the container 9 to retract the stopper pin 21, so that the stopper pin 20 remains retracted in the container 9.

For normal driving, the select lever 1 may be left in the D range, but when a steep uphill slope or a steep downhill slope is desired, and so-called engine braking is desired, the range is set to the 2 range or the L range. It will be switched. For this reason, when the select lever 1 is moved to the right in the drawing and moved to the 2 range or the L range by passing it, the actuator 20 is pushed by the select lever 1 and part of the actuator 20 is retracted into the container 9.

When the actuator 20 retracts, the container 9
The fluid 11 in the chamber A pushes the ball 15 and opens the valve 16 to enter the chamber B, so that the stopper pin 21 is pushed to project it toward the select lever 1. FIG. 5 shows the case where the two ranges are selected in this way. As described above, since the stopper pin 21 projects when the actuator 20 retracts, the amount of the fluid 11 that enters the retracted portion of the actuator 20 and the amount of the fluid 11 that enters the stopper pin 21 are made equal. Keep it.

When the stopper pin 21 projects by retracting the actuator 20, the fluid in the chamber A moves the ball 15 away from the tapered hole 13, that is, opens the one-way valve 16 and moves to the chamber B. Since the fluid resistance is small, the movement of the actuator 20 is not hindered.

Next, when the driving condition is changed and the select lever 1 is moved to the left side in the figure in order to return to the D range again, as shown in FIG. 6, the actuator 20 which has been pushed by the select lever 1 until then is springed. 22
It is projected from the container 9 by the elastic force of. When the actuator 20 projects, the amount of the fluid 11 that enters the actuator 20 increases, so that the amount of the fluid 11 on the chamber A side becomes insufficient, and the fluid 11 moves from the chamber B side.

Due to the action of the fluid 11, the stopper pin 21 is retracted into the container 9 and the stopper pin 21 is retracted into the container 9. The ball 15 sits in the tapered bore 13 and closes the valve 16 so that the fluid 11 moves only through the orifice 14. Therefore, the stopper pin 21 does not momentarily retract, but retracts with a time delay.

Since the stopper pin 21 is not retracted instantaneously and a predetermined amount of fluid 11 moves from the chamber B to the chamber A through the orifice 14, it is retracted, so that the select lever 1 is moved to the N range side in the meantime. Even if it is attempted, the detent pin 5 cannot be moved because it is blocked by the protruding stopper pin 21 as shown in FIG. For this reason, when switching from the L range or the 2 range to the D range, there is too much power to pass the D range and enter the N range.

The required amount of the fluid 11 in the chamber B is the orifice 1
When the stopper pin 21 is moved into the chamber A through the container 4, the stopper pin 21 is retracted into the chamber B in the container 9 (see FIG. 7). If the stopper pin 21 is retracted, there is nothing that hinders the movement of the detent pin 5. Therefore, as shown in FIG. 8, place the select lever 1 at the position where the detent pin 5 and the stopper pin 21 are in the same row, that is, the N range (see FIG. 3). You will be able to enter.

When it is desired that the select lever 1 be quickly moved to the N range, the detent button 4 of the knob 3 may be pressed. That is, when the detent button 4 is pressed, the detent pin 5 descends along the hole 1a of the select lever 1 and moves to a position where it does not come into contact with the stopper pin 21, so that the selector lever 1 is moved to the N position before the stopper pin 21 is completely retracted. You will be able to put it in the range.

Although the actuator 20 is directly pushed by the select lever 1 in the embodiment described above, a member for pushing the actuator 20 may be attached to the select lever 1 instead.
Further, the inclined surface portion 20a is formed at the tip of the actuator 20 so that the select lever 1 can be easily pushed. However, instead of the inclined surface portion 20a, a roller is attached to the tip portion and the roller is attached to the select lever 1 or this member. You may make it contact | abut. By doing so, the slope portion 20
The actuator 20 can be pushed in with a force smaller than that in the case where a is formed.

[0027]

The present invention is a gear shift erroneous operation preventing device constructed as described above, in which the actuator and the stopper pin are selectively projected in accordance with the movement of the select lever, and the movement of the select lever is restricted. Since the protrusion of the stopper pin that applies the force is delayed, when trying to switch from the L range or 2 range to the D range without pressing the detent button, the force becomes excessive and enters the N range. It is possible to reliably prevent the situation. Therefore, no impact is given to the engine and the transmission. Unlike the above-mentioned prior art, it is a mechanical one that uses only the flow of fluid without relying on electrical circuits and means, so there is no room for malfunction and it has excellent durability and productivity. And it becomes advantageous in terms of cost.

[Brief description of drawings]

FIG. 1 is a side view showing a select lever according to an embodiment of the present invention in a partially transparent state.

FIG. 2 is a rear view of FIG. 1 shown from the right side.

FIG. 3 is a side view showing a main part of the present invention in FIG.

FIG. 4 is a cross-sectional view of FIG. 3 taken along the line AA.

FIG. 5 is a cross-sectional view showing a different state of that of FIG.

6 is a sectional view showing a further different state of that of FIG. 4;

FIG. 7 is a sectional view showing a further different state of that of FIG. 4;

FIG. 8 is a cross-sectional view showing a further different state of that of FIG.

[Explanation of symbols]

 1 Select Lever 3 Knob 4 Detent Button 5 Detent Pin 7 Detent Plate 9 Container 11 Fluid 14 Orifice 16 One-way Valve 20 Actuator 21 Stopper Pin

Claims (1)

[Claims] 1. A shift operating device in which a detent pin provided on a select lever is moved in the longitudinal direction of the select lever by pressing a detent button, in which a side portion of a detent plate is filled with fluid and a one-way valve is internally provided. And a container provided with an orifice, the container is provided with an actuator and a stopper pin, one of which projects on the select lever side, and a stopper pin,
An erroneous gear shift prevention device, characterized in that the selector lever is positioned so as to project at a position that prevents the select lever from entering the neutral position when the detent button is not pressed.