JPH05164221A - Shift lock release device for automatic transmission - Google Patents

Abstract

PURPOSE:To release the lock of a shift lever without operating a shift lever lock device. CONSTITUTION:A long hole 24 is formed in an intermediate part of a shaft 12 of a shift lever 10, and a detent pin 28 is protruded along the axial direction of the shaft in a movable manner. The detent pin is inserted into a detent hole 22 of a detent plate 20, and held at the intermediate part of the long hole in the condition energized upward by means of a compression coil spring. A lock plate 38 is arranged underside of the detent pin at the 'P' position, and the lowering operation is prevented by a plate stopper 44 under the shift-lock condition. The detent pin is shifted upward by the compression coil spring, and inserted into a bypass hole 82. This arrangement allows the engagement of the detent pin with the detent plate to be released, enabling the shift operation by the shift lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission shift lock releasing device for releasing a shift lock of an automatic transmission.

[0002]

2. Description of the Related Art A shift lever of an automatic transmission is provided with a pin groove that engages with a detent plate. In the engaged state of the detent plate and the pin grooved, the shift operation by the shift lever is blocked, and by releasing the engaged state of the detent plate and the pin grooved, the shift lever becomes movable and the shift operation can be performed.

The engagement between the detent plate and the pin groove can be released, for example, by moving the pin groove downward along the axial direction of the shift lever.

As a shift lever locking device that enables the shift lever to operate only under a specific condition such as when a brake is operated, there is known a device in which a pin groove provided on the shift lever is restricted by a shift lock plate.
In this shift lever lock device, when the shift lever is in the position of the parking range (P range), the pin groove is engaged with the shift lock plate to prevent the pin groove from moving downward and the shift lock plate moves downward. Is blocked by the plate stopper and the shift operation of the shift lever is restricted. Further, when the brake operation is performed, the solenoid is energized, the plate stopper is moved, the shift lock plate can be lowered, and the shift lever shift operation can be performed.

When the solenoid is electrically connected to the ignition key insertion cylinder and the shift lever is in the parking range position, the key is inserted into the cylinder and the ignition switch is turned on. As far as possible, there is also known a shift lever lock device in which the solenoid is excited and the plate stopper is moved to enable the shift operation of the shift lever.

By the way, when the lock of the shift lever lock device is released for maintenance or the like, it is performed by operating the lock release button. The shift lever lock device is unlocked by operating the lock release button to release the engagement between the shift lock plate and the plate stopper, enabling the shift lever to shift. The shift operation is performed.

[0007]

However, in such a shift lever locking device, when the locked state of the shift lever is released, the plate stopper is forcibly moved so that the shift lock plate can be moved. It has become. Therefore, if the shift lever locking device malfunctions, for example, if the solenoid is seized, the shift lock may not be released.

An object of the present invention is to provide a shift lock releasing device for an automatic transmission which can release the shift lock without forcibly operating the shift lever locking device.

[0009]

A shift lock release device for an automatic transmission according to the present invention is provided at an intermediate portion of a shift lever arranged substantially vertically so as to be movable in the axial direction. A pin groove, a movement operation means for moving the pin groove downward from a predetermined position, and a detent portion provided along the operation direction of the shift lever, and the movement operation means allows the pin groove to enter and be held at each shift position. And a detent hole that is movable below the pin groove, and a lock unit that locks the shift lever by abutting against the pin groove to prevent the pin groove from descending. A shift lock releasing device for a machine, comprising at least the detent portion and the pin groove. A bypass unit having its one locked state of the shift lever by provided the other enters into is released, and having a moving means for entering the other to the bypass section.

[0010]

In the shift lock releasing device for an automatic transmission according to the present invention having the above-described structure, the bypass portion where the pin groove is not held in the detent hole is provided in at least one of the pin groove and the detent portion. Further, the other means is made to enter the bypass portion by the moving means.

In the shift lock of the automatic transmission to which the present invention is applied, the pin grooved inserted in the detent hole is moved downward by the moving operation means to release the holding of the pin grooved of the detent hole at each shift position. , Move the pin groove together with the shift lever. Since the locking means prevents downward movement of the pin groove, the pin groove in the detent hole is not released, and the shift lever is locked.

In a normal operating state, the pin groove is
It is lowered from a predetermined position by the moving operation means, and the shift lever is operated. When either the pin groove or the detent portion moves to enter the bypass portion, the pin groove is not held in the detent hole, and the shift lever can be shifted. That is, the locked state of the shift lever is released.

As described above, according to the present invention, the pin groove can be held in the detent hole when the moving means does not act. When performing shift operation of the shift lever in the locked state of the shift lever, the detent portion or the pin groove is moved by the moving means to enter the bypass portion. As a result, the pin groove is not retained in the detent hole, and the lock lever is unlocked so that the shift lever can be operated.

The bypass portion of the present invention may be provided on the pin grooved or may be provided on the detent portion. Further, the pin groove and the detent portion may be provided as a pair.
For example, by moving the pin groove by moving means,
It suffices if the pin groove can be prevented from being held in the detent hole by allowing the pin groove to enter the bypass portion.

[0015]

【Example】

[Embodiment 1] FIG. 1 is a side view of a shift lever 10 of an automatic transmission according to this embodiment.

In the shift lever 10, one end of a shaft 12, which is a hollow pipe, is attached to a shift knob 14, and the other end is pivotally supported by a base plate 18 via a tubular retainer 16. The shift lever 10 can be shifted by rotating the retainer 16 in the directions of arrow A and arrow B in FIG. 1 by operating a shift knob 14 attached to the upper end.

A detent plate 20 is erected on the upper end of the base plate 18 in the plate thickness direction along the axial direction of the retainer 16. A detent hole 22 is formed in the detent plate 20. A detent pin 28 of a pin groove 26, which is disposed on the shaft 12 of the shift lever 10 and projects from the elongated hole 24 in a direction substantially perpendicular to the axial direction of the shaft 12, is inserted into the detent hole 22.

As shown in FIG. 2, the detent pin 2
Reference numeral 8 is provided at the lower end of a rod 30 arranged in the shaft 12, and when the rod 30 moves up and down, the long hole 2
4 is vertically movable along the axial direction of the shaft 12.

A shift lever lock device 32 is arranged on the side of the detent plate 20, that is, on the side where the tip of the detent pin 28 projects from the detent hole 22. Here, the shift lever lock device 32 of the shift lever 10 will be described.

As shown in FIG. 3, the shift lever lock device 32 includes a base plate 34. The base plate 34 is a plate material bent in an L-shaped cross section,
It is fixed to the side of the detent plate 20. A pair of support pins 36 are vertically projected in parallel to the side wall 34A of the base plate 34, and a lock plate 38 is slidably supported by the support pins 36.

As shown in FIG. 1, the lock plate 3
8 is vertically movable along the axial direction of the shift lever 10 located at the "P" shift position. The lock plate 38 is formed with a notch 40, one of which is opened toward the "R" shift position on the left side of FIG. The notch 40 is formed by obliquely cutting the “R” shift position side to form an inclined surface 40A. When the shift lever 10 is moved from the “R” to the “P” shift position in the notch 40, the detent pin 28 is guided by the inclined surface 40A and pushes up the lock plate 38 to enter the inner depth 40B of the notch 40. It has become.

Further, when the detent pin 28 is located in the inner portion 40B, the lock plate 38 reaches the lower limit by opening the detent pin 28, and the lock plate 38 is opened toward the "R" side of the detent hole 22. Pin 2
8 is movable in the “R” direction.

At the lower end of the lock plate 38, a lower cutout 42 is formed at a corner corresponding to the shift position of "P". The front end locking portion 46 of the plate stopper 44 enters into the lower cutout 42 and can be engaged. As shown in FIG. 3, the plate stopper 44 is rotatably supported by a support pin 48 fixed to the bottom wall 34 </ b> B of the base plate 34 with its axis extending vertically. As shown in FIG. 1, the tip stopper 4 of the plate stopper 44
In the state where 6 is engaged with the lower cutout 42, the lock plate 38 cannot be lowered, so the detent pin 28 cannot be pulled out from the deep groove of the detent hole 22 in the “P” range, and the shift operation of the shift lever 10 is blocked. .. That is, the shift lever 10 is locked.

As shown in FIG. 3, the base plate 3
A solenoid 50 is attached to the bottom wall 34B of No. 4, and a plunger 52 is connected to a protrusion 54 formed on the plate stopper 44. The solenoid 50 draws the plunger 52 when energized. When the solenoid 50 is not energized, the plunger 52 is pulled out by the urging force of the return spring 56 wound around the plunger 52.
When the solenoid 50 is excited, the plate stopper 44 is swung around the support pin 48 in the direction of arrow C in FIG. 3 by pulling the plunger 52 against the biasing force of the return spring 56. In the state where the plate stopper 44 is swung in the direction of arrow C as described above, the front end locking portion 46 has the lower cutout 4 of the lock plate 38.
It becomes a state separated from 2.

With this solenoid 50, the shift lever 10 is selected to the "P" shift position, the ignition switch (not shown) is "ON", and the foot brake is depressed while the engine is operating. Only when it is turned on, energization is excited by electrical control. That is, when the shift lever 10 is in a shift position other than "P" and the ignition switch is "ON" and the engine is not in the operating state, energization is not performed.

A control switch 58 is attached between the side wall 34A of the base plate 34 and the solenoid 50. The control switch 58 can detect the moving position of the lock plate 38 by sliding the contact plate (not shown) together with the lock plate 38.

On the side of the lock plate 38, a release lever 60 is rotatably supported by an upper support pin 36. A projecting portion 60A is formed at the lower end portion of the release lever 60 and can come into contact with the side surface of the plate stopper 44. A torsion coil spring 62 is wound around the support pin 36. One end of the torsion coil spring 62 is locked to the side wall 34A of the base plate 34, and the other end thereof is connected to the release lever 6.
0, and the release lever 60 is shown in FIG.
When it is rotated in the direction, the urging force acts in the direction of returning it.

On the upper end of the release lever 60, a dish-shaped pressing portion 64 is formed so as to project in a substantially right angle direction, and a manual release button (not shown) is in contact therewith. By pressing the pressing portion 64 in the direction of arrow E in FIG. 3,
The release lever 60 rotates around the support pin 36 in the arrow D direction.

The lock plate 38, plate stopper 44, solenoid 50, control switch 4
6, the release lever 60, and the like are assembled from one side of the single base plate 34, and are unitized together with the base plate 34.

Next, the shift lever 10 and the shift lock releasing device 84 will be described. As shown in FIG. 2, the upper end of the rod 30 in the shaft 12 is
2 is inserted into the shift knob 14, and a block 66 is attached to the tip. A compression coil spring 68 serving as a moving unit is interposed between the block 66 and the upper end of the shaft 12, and the rod 12 is biased upward by the compression coil spring 68.

Further, the block 66 has an inclined surface 66A formed by inclining the upper end thereof, and a detent inserted into the inclined surface 66A from one end in a direction intersecting the axial direction of the shaft 12 of the shift knob 14. The release button 70 is in contact. The detent release button 70 serves as a moving operation means, and a slide groove 72 is formed. Further, the shift knob 14 is provided with a screw hole 74 corresponding to the slide groove 72 of the detent release button 70. A locking pin 76 is screwed into the screw hole 74, and the tip of the locking pin 76 is inserted into the slide groove 72 of the detent release button 70. Therefore,
The movement range of the detent release button 70 is limited by the slide groove 72 and the locking pin 76.

Further, the detent release button 70 has a flange 78 formed inside the shift knob 14.
The compression coil spring 80 that abuts this flange 78.
The shift knob 14 is urged outward by the shift knob 14, and the tip of the detent release button 70 is normally located at the shift knob 1.
4 is projected. The upper end of the block 66 can be inserted between the detent release button 70 and the flange 78. Also, detent release button 7
By pushing 0 into the shift knob 14 against the biasing force of the compression coil spring 80, the inclined surface 66A of the block 66 is pressed, and the rod 30 is pushed downward against the biasing force of the compression coil spring 68 (to the retainer 16). It is designed to be moved in the direction of approaching).

The detent hole 22 is "P",
The upper inner peripheral wall is bent in an uneven shape in association with each shift position of “R”, “N”, “D”, “2”, and “L”. As a result, the movement of the detent pin 28 in the arrow A or arrow B direction is restricted.

The detent pin 28 is normally provided with the long hole 2 because the detent release button 70 is prevented from moving upward by the slide groove 72 and the locking pin 76.
4, the detent pin 28 is prevented from moving in the arrow A direction and the arrow B direction in FIG. 1 when the detent pin 28 is positioned at “P” and “N” of the detent hole 22 in this state. It That is, the shift operation position is provided such that the detent pin 28 must be moved downward by pressing the detent release button 70 before the shift lever 10 can be swung in the direction of arrow A or arrow B. .. For example, at the "P" shift position, the detent pin 28 is inserted into the deep groove of the detent hole 22, and the shift operation to the "R" shift position cannot be performed without the above operation.

Further, the detent plate 20 is provided with a bypass hole 82 above the detent hole 22 and along the detent 22. The bypass hole 82 serves as a bypass portion that constitutes a part of the shift lever lock releasing device 84, and is connected to the detent hole 22 at the “P” and “D” positions of the detent hole 22. Since the detent pin 28 is normally prevented from moving upward, the detent pin 28 is not located in the bypass hole 82.

Slide groove 7 of detent release button 70
By pulling out the locking pin 76 from the 2, the detent release button 70 further projects from the shift knob 14, and the upper end of the block 66 is compressed by the compression coil spring 68.
It is further inserted between the detent release button 70 and the flange 78 by the urging force of. As a result, the detent pin 28 is moved upward along the long hole 24 and inserted into the bypass hole 82. This bypass hole 82 is
The detent pin 28 is movable in the arrow A direction and the arrow B direction in FIG.
Is capable of shifting.

Next, the operation of this embodiment will be described. When the ignition switch is in the "ACC", "LOCK" and "ON" positions when the engine is stopped, the solenoid 50
3 is in a non-energized state, the plate stopper 44 is biased by the return spring 56 in the direction opposite to the arrow C in FIG. Therefore, the lock plate 38 is prevented from moving downward along the axis of the shift lever 10. Therefore, the movement of the detent pin 28 is prevented while the detent pin 28 is in the deep groove of the detent hole 22, so that the shift lever 10 is prevented from performing the shift operation.

When shifting the shift lever 10, the ignition switch "START", "O"
After starting the engine with "N" operation, depress the foot brake. As a result, the solenoid 50 is energized and excited by electric control, the plunger 52 is attracted against the urging force of the return spring 56, and the plate stopper 44 is swung in the direction of arrow C in FIG. Therefore, the leading end locking portion 46A of the plate stopper 44 is separated from the lower cutout 42 of the lock plate 38. As a result, the lock plate 38 can be moved downward, the detent release button 70 can be pressed to move the detent pin 28 downward, and the shift lever 10 can be operated to a desired shift position.

When the engine is not in operation or when the connection to the power source is cut off during vehicle maintenance work, the solenoid 50 is not energized and excited. It is biased in the direction, and is held in a state where the leading end locking portion 46 enters the lower cutout 42 of the lock plate 38. As a result, the lock plate 38 cannot move downward along the axis of the shift lever 10, and the shift lever 10 is prevented from moving the detent pin 28 downward, so that the shift lever 10 cannot be locked. It becomes a state.

In this state, when the shift operation is performed, the locked state of the shift lever 10 can be forcibly released by a manual operation.

That is, the pressing portion 6 of the release lever 60
When 4 is pressed in the direction of arrow E in FIG. 3, the release lever 60 is rotated in the direction of arrow D in FIG. Therefore, the projection 60A of the release lever 60 is not
The side surface of the plate stopper 44
The return spring 5 with the support pin 48 as the center of rotation.
6 and the torsion coil spring 62 are rotated against the urging force, the tip end stopper portion 46 of the plate stopper 44 is disengaged from the lower cutout 42 of the lock plate 38, and the shift lever 10 is unlocked. Therefore, the shift lever 10 can be shifted by pressing the detent release button 70.

On the other hand, in the shift lock state, the shift knob 1
By pulling out the locking pin 76 screwed into the screw hole 74 of the No. 4 from the slide groove 72 of the detent release button 70, the detent release button 70 pushes the block 66 upward together with the biasing force of the compression coil spring 80. It is pushed out by the biasing force of the coil spring 68. At this time, the upper end of the block 66 enters between the detent release button 70 and the flange 78, and the detent release button is held in a state of being pushed out from the shift knob 14.

As a result, the rod 30 connected to the block 66 is pushed up, the detent pin 28 is moved to the upper end of the elongated hole 24 while pushing up the lock plate 38, and is inserted from the detent hole 22 into the bypass hole 82. ..

In the bypass hole 82, the detent pin 28 is freely movable in the arrow A direction and the arrow B direction in FIG. 1, whereby the shift lever 10 is rotated in the arrow A direction and the arrow B direction. It becomes possible to move. That is, the shift lever 10 is unlocked.

In this state, the shift lever 10 is rotated to the "D" shift position, and then the detent release button 70 is pushed into the shift knob 14 to move the detent pin 28 into the detent hole 22. Is inserted. As a result, the shift lever 10 can be rotated in the arrow A direction and the arrow B direction in FIG. 1 to the shift position from “R” to “L” while pressing the detent release button 70.

To unlock the shift lever 10, it is not necessary to move the plunger 52 of the solenoid 50 of the shift lever lock device 32, and the lock lever can be easily unlocked.

In this embodiment, the release button 60
Although the example in which the shift lever 10 is unlocked in combination with the shift lever 10 described above has been described, the shift lever unlock device 84 to which the present invention is applied may of course be used alone.

[Second Embodiment] Next, a second embodiment of the present invention will be described. In the second embodiment, the shift lever 1
0 and the shift lever lock device 32 have the same basic configuration as that of the first embodiment, and the same parts are designated by the same reference numerals and the description thereof is omitted.

FIG. 4 shows an intermediate portion of the shift lever 10. A pin groove 86 is arranged at the lower end of the rod 14 of the shift lever 10. On the pin groove 86, a detent pin 88 slidable along the axial direction of the rod 30 is provided so as to project in a direction orthogonal to the axial direction of the rod 30. Further, the detent pin 88 projects from the long hole 24 of the shaft 12.

A flange 90 is coaxially formed on the intermediate portion of the rod 30, and a compression coil spring 92 is wound around the rod 30. The detent pin 88 is attached to the lower end of the rod 30 by the urging force of the compression coil spring 92. It is located.

On the outer periphery of the shaft 30, a substantially cylindrical tubular body 94 is slidably attached as a moving means along the axial direction of the rod 30. The detent pin 88 penetrates the cylindrical body 94, and the cylindrical body 94 is the detent pin 8
It is designed to move with 8. A slide knob 96 is provided on the upper end of the cylindrical body 94. The slide knob 96 is pushed up along the axial direction of the shaft 12 so as to resist the biasing force of the compression coil spring 92 and detent pin. 88 is moved upwards.

When the shift lock of the shift lever 10 is released, the detent pin 88 may be moved from the detent hole 22 to the bypass hole 82 (only part of which is shown in FIG. 4) by the slide knob 96. In this case, the screw hole 74 of the shift knob and the slide groove 72 of the detent release button 70 are unnecessary.

[Third Embodiment] Next, a third embodiment of the present invention will be described. In the third embodiment as well, the shift lever 1
0 and the shift lever lock device 32 have the same basic configuration as that of the first embodiment, and the same parts are designated by the same reference numerals and the description thereof is omitted.

A block-shaped pin groove 100 is arranged in the middle of the shaft 12 of the shift lever 10. The pin grooved 100 is pressed by the detent release button 70 of the shift knob 14 to push the rod 3
0 (not shown in FIG. 5) is movable along the axial direction of the shaft 12. Further, a detent hole 104 is formed in the detent plate 102 arranged along a direction substantially orthogonal to the axial direction of the shaft 12. The detent holes 104 are “P”, “R”,
The pin groove 100 can be held at the shift positions of “N”, “D”, “2” and “L”.

In the lower part of the pin groove 100,
A rectangular notch 106 serving as a bypass is formed. This notch 106 is the detent hole 10.
When it is inserted into No. 4, the pin groove 100 is not held in the detent hole 104.

Normally, the notch 1 of the pin groove 100
Any position above 06 is the detent hole 104
It is supposed to be held in. Further, when the pin groove 100 is in the “P” position, the pin groove 100
A shift lock plate (not shown) is arranged below the pin, and the pin groove 100 can be moved to the adjacent “R” position by moving the shift lock plate downward.

When releasing the shift lock, the locking pin 76 is pulled out from the slide groove 72 of the detent release button 70, the rod 30 is moved upward, and the notched portion 106 of the pin groove is positioned in the detent hole 104. As a result, the holding of the detent hole 104 and the pin groove 100 is released, and the shift lever 10 can be shifted.

As described above, the bypass portion for releasing the holding state of the pin grooved in the detent portion can be provided in the pin grooved 100.

[0059]

As described above, the shift lock release device for an automatic transmission according to the present invention can release the locked state of the shift lever without forcibly moving the shift lock device. Therefore, for example, an excellent effect that the locked state of the shift lever can be reliably released even if the solenoid of the shift lock device is damaged is obtained.

[Brief description of drawings]

FIG. 1 is a side view showing a shift lever according to this embodiment.

FIG. 2 is a cross-sectional view of the main part of the shift lever taken along the line 2-2 of FIG.

FIG. 3 is a perspective view showing a shift lever lock device applied to this embodiment.

FIG. 4 is a cross-sectional view of essential parts of a shift lever according to a second embodiment of the present invention.

FIG. 5 is a perspective view of an essential part of a shift lever according to a third embodiment of the present invention.

[Explanation of symbols]

 10 shift lever 32 shift lever lock device 20 detent plate (detent portion) 22 detent hole 26, 86, 100 pin grooved 28, 88 detent pin 38 lock plate (locking means) 68 compression coil spring (moving means) 70 detent release button (moving) Operation means) 82 Bypass hole (bypass portion) 84 Shift lever lock release device 94 Cylindrical body (moving means) 106 Cut portion (bypass portion)

Claims (1)

[Claims] 1. A pin groove, which is provided at an intermediate portion of a shift lever arranged substantially vertically, so as to be movable in the axial direction, and a moving operation means for moving the pin groove downward from a predetermined position. A detent hole is provided in the detent portion along the operating direction of the shift lever, and the pin groove can be held by the moving operation means at each shift position, and a detent hole movably provided below the pin groove. A shift lock release device for an automatic transmission, comprising: a lock means for bringing a shift lever into a locked state by coming into contact with the shift lever to lock the shift lever, wherein at least the detent portion and the pin groove are provided. The shift lever is locked by being provided on one side and entering the other A bypass section which state is released, the shift lock release device for an automatic transmission and having a moving means for entering the other to the bypass section.