JPH0612298Y2 - Shift lever device for automatic transmission - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a shift lever device for an automatic transmission used for operating an automatic transmission mounted on an automobile from a passenger compartment.

[Prior Art] A shift lever device for an automatic transmission is disclosed in Japanese Utility Model Laid-Open No. 55-81.
As disclosed in Japanese Patent No. 813 and the like, a day tent pin provided on a swingable shift lever is inserted into a day tent hole formed in a day tent plate, and the day tent pin is located above the day tent hole. It is adapted to come into contact with the inner peripheral surface and the side inner peripheral surface. The inner peripheral surface of the upper part of the day tent hole is formed in a stepped shape, and when the day tent pin comes into contact with the step surface, the shift lever is prevented from swinging, and a specific shift position is changed to another specific shift position. The shift operation due to an erroneous operation to is prevented.

The day tent pin is arranged in the longitudinal middle part of the shift lever so as to be movable in the vertical direction, and is biased upward by the first spring. Second on the top of the shift lever
An operation button urged by a spring is provided and linked with the day tent pin.

Here, in each shift position, since the height position where the day tent pin contacts the upper inner peripheral surface of the day tent hole is not uniform, the pressing operation of the operation button is released regardless of the height position of the day tent pin. Then, it is linked with the day tent pin so as to be returned to the original position by being biased by the second spring.

With the above configuration, when the operation button is not operated,
The day tent pin is pressed against the upper inner peripheral surface of the day tent hole by the urging force of the first spring. Further, when the operation button is pressed against the urging force of the second spring, the day tent pin moves downward against the urging force of the first spring, and moves downward from the step surface of the upper inner peripheral surface. The shift operation can be performed between specific shift positions.

Further, in the parking shift position, the swing of the shift lever is prevented by the abutting of the day tent pin on the inner peripheral surface of the side portion of the day tent hole, so that one swing limit of the shift lever is restricted. Has become. The step position is set to the parking shift position so that the shift operation can be performed only by pressing the operation button. Therefore, the day tent pin is moved downward and inside the side portion of the day tent hole. It will come into contact with the peripheral surface.

For this reason, in the parking shift position, when the pressing operation of the operation button is released while the operation force is being applied by pressing the shift lever, the operation button is biased by the second spring and returns to the original position. The day tent pin may not be able to move upward due to the frictional force generated between the day tent pin and the side inner peripheral surface of the day tent hole due to the operation force.

Further, even if the pressing operation of the shift lever is released, the day tent pin may not be able to move upward as it is. This is so that the force transmitted from the moderation mechanism provided in the hydraulic control device of the automatic transmission, which is linked to the shift lever via the wire, presses the day tent pin against the inner peripheral surface of the side part of the day tent hole. This is because it works.

Since the person operating the shift lever can feel the above state, the date tent pin can be moved upward by swinging the shift lever back and forth and making a slight stroke. For this reason, there is a problem in that the operation becomes troublesome and the shift lever comes back to move backward, which gives an uncomfortable feeling to the operation.

In Japanese Utility Model Application Laid-Open No. 55-81813, it is proposed to provide a resin material on the inner peripheral surface of the day tent pin or the day tent hole for the purpose of preventing hitting sound and impact. Therefore, it is conceivable to use this resin material having a small surface friction coefficient to reduce the frictional force.
It is not a fundamental solution.

Further, if the biasing force of the first spring is increased so as to resist the frictional force, the pressing operation force of the operation button is increased and the operation feeling is deteriorated.

[Problems to be Solved by the Invention] In view of the above, the present invention is directed to an automatic transmission capable of preventing a day tent pin from being unable to move due to friction with an inner peripheral surface of a side part of a day tent hole in a parking shift position. It is an object to provide a shift lever device for a machine.

[Means for Solving the Problems] The present invention is directed to a parking shift position located at one swing limit of a shift lever that is swingably arranged. The shift lever device for an automatic transmission is provided with shift lever rocking preventing means for preventing the shift lever from rocking by coming into contact with the shift lever before coming into contact with the inner peripheral surface of the side portion of the daytent hole. , The above-mentioned subject was solved.

[Operation] In the present invention as the above means, in the parking shift position, the day tent pin does not contact the inner peripheral surface of the side portion of the day tent hole, and therefore the movement thereof is hindered by friction with the inner peripheral surface of the side portion. There is no.

[Embodiment] FIGS. 1 to 3 show a first embodiment of a shift lever device for an automatic transmission to which the present invention is applied.

As shown in FIG. 2, in the shift lever device of this embodiment, the shift lever plate 10 attached to the vehicle body is used.
The day tent plate 12 is fixed to the. A bracket (not shown) is fixed to the shift lever plate 10 so as to be opposed to the day tent plate 12 behind the day tent plate 12 in the drawing. Both ends of the shaft 14 are supported by the day tent plate 12 and a bracket (not shown), and the lower end of the shift lever 16 is rotatably supported by the middle of the shaft 14.

The shift lever 16 is provided with a day tent pin 18 at an intermediate portion in the longitudinal direction extending in the vertical direction, and the day tent pin 18 is urged upward by a first spring (not shown). An operation button 20 biased by a second spring (not shown) is arranged above the shift lever 16, and the operation button 20 is linked to the day tent pin 18 via a rod 22 as in the conventional device. There is.

The day tent pin 18 is inserted into a day tent hole 24 formed in the day tent plate 12. The day tent hole 24, as shown in detail in FIG.
6, a lower inner peripheral surface 28, and side inner peripheral surfaces 30 and 32. The upper inner peripheral surface 26 is formed in a stepped shape, the step surface extends along the radial direction centered on the shaft 14, and the other surface extends along an arc centered on the shaft 14. The lower inner peripheral surface 28 extends along an arc centered on the shaft 14. Side inner peripheral surfaces 30 and 32 are shaft 1
It extends along a radial direction centered at 4.

The shift lever 16 swings around the shaft 14 as an axis to change the hydraulic range of a hydraulic control device (not shown). When the date tent pin 18 does not face the stepped surface of the upper inner peripheral surface 26, the operation button 20 is operated. The shift operation can be performed without performing the shift operation. When the day tent pin 18 faces the stepped surface of the upper inner peripheral surface 26, the operation button 20 is pressed to move the day tent pin 18 downward. Is possible. 2 and 3, the position of the shift lever 16 and the shift positions “P”, “R”, “N”, “D”,
The relationship between "2" and "L" is shown.

As shown in FIG. 1, an upper end portion of the day tent plate 12 is bent at a right angle toward the shift lever 16 side, and this portion forms a stopper portion 34 as a shift lever swing preventing means. ing. The shift lever 16 comes into contact with the stopper portion 34 to be prevented from swinging, and in this state, the shift position is set to "P" (parking). Also, in this state,
The day tent pin 18 is formed on the inner surface 3 on the side of the day tent hole 24.
It is set to be separated from 0. When performing a shift operation from this "P" shift position to another shift position, or from another shift position to a "P" shift position, the operation button 20 must be pressed. .

Further, the shift lever device of this embodiment is provided with a shift lever restraining mechanism that restrains the shift lever 16 at the "P" shift position. As shown in FIG. 2, this mechanism includes a cam plate 38 that is vertically movable by being guided by three pins 36 projecting from the date tent plate 12, and an intermediate portion of the date tent plate 12. A cam stopper 40 that is pivotally supported and swingably arranged to prevent downward movement of the cam plate 38, a solenoid 42 fixed to the day tent plate 12 and having a plunger linked to the lower end of the cam stopper 40, and a day tent. A detection switch 48 fixed to the plate 12 to detect the moving position of the cam plate 38 and a computer 50 to control the solenoid 42 based on an electric signal from the detection switch 48 are provided.

The cam plate 38 is formed with a cutout portion 52 for accommodating the day tent pin 18, and the shift lever 16 is "P".
The day tent pins 18 are accommodated in a state in which the day tent pins 18 are located in the shift position. The upper portion of the cam stopper 40 has a notch 52 facing the notch 38A of the cam plate 38 accommodating the day tent pin 18,
By contacting the cam plate 38, the downward movement of the cam plate 38 is prevented. In this state, the solenoid 42 is not excited and the plunger is pushed forward by the return spring 54. When the solenoid 42 is excited from this state, the plunger is pulled against the urging force of the return spring 54, the cam stopper 40 swings counterclockwise in FIG. 2, and the posture shown by the broken line in FIG. In this state, the cam stopper 40 does not hinder the downward movement of the cam plate 38.

The computer 50 starts control when the ignition switch of the vehicle equipped with the shift lever device of this embodiment is turned on, and when the brake pedal is operated to turn on the switch, the solenoid 42 is demagnetized and the cam plate 38
When the switch 48 detects that the notch 38A has passed the upper end of the cam stopper 40 by moving downward, it is determined that the date tent pin 18 has fallen out of the "P" shift position and the solenoid 42 is excited. It has become.

Further, in the shift lever device of this embodiment, the shift lever 16 constrained by the "P" shift position.
Is provided with a shift lever restraint release mechanism capable of manually releasing the restraint state. This mechanism includes a restraint release button 46 supported by a housing 44 fixed to the day tent plate 12, a return spring 56 also supported by the housing 44 for urging the restraint release button 46 upward, and an intermediate portion of the mechanism. A bell crank 58 pivotally supported by the tent plate 12 and one end of which is pivotally supported by the restraint release button 46.
And a link 6 whose one end is rotatably supported by the bell crank 58 and the other end is rotatably supported by the upper end of the cam stopper 40.
It has 0 and.

In the shift lever restraint release mechanism, when the restraint release button 46 is pressed against the biasing force of the return spring 56,
The bell crank 58 is swung so that the cam stopper 40 is swung counterclockwise in FIG. 2 through the link 60, so that the cam 42 is in the same posture as when the solenoid 42 is excited. Also,
When the solenoid 42 is excited to swing the bell crank 58, the link 60 floats with respect to the bell crank 58, so that the bell crank 58 is not swung.

Next, the operation of this embodiment will be described.

When the vehicle equipped with the shift lever device of this embodiment is in the parked state, the shift lever device is in the state shown in FIG. 2, and the shift position of "P" is selected.

In this state, when the operation button 20 is pressed against the biasing force of the second spring (not shown) in order to shift to another shift position, the daytent pin 18 resists the biasing force of the first spring (not shown). And moves downward, and the cam plate 38 also moves downward following the movement of the day tent pin 18. The cam plate 38 is a day tent pin 1.
Before 8 passes through the step surface of the upper inner peripheral surface 26 of the day tent hole 24, it comes into contact with the cam stopper 40 and is prevented from moving downward. As a result, the day tent pin 18 is also prevented from moving downward, so that the shift operation to another shift position cannot be performed.

When the engine is started in this state, the control by the computer 50 is started by turning on the ignition switch. When the brake pedal is depressed, the solenoid 42 is excited and the plunger is pulled against the urging force of the return spring 54, and the cam stopper 40 swings counterclockwise in FIG. As a result, the downward movement of the cam plate 38 is not obstructed. Thereafter, when the operation button 20 is pressed, the day tent pin 18 moves downward similarly to the above, and the cam plate 38 also moves downward following the day tent pin 18, but this time the cam plate 38 moves downward. Since the movement of the day tent is not hindered, the day tent pin 18 can be moved downward to a position where it passes the step surface of the upper inner peripheral surface 26 of the day tent hole 24, and when the shift lever 16 is swung from this position, the day tent pin 18 is moved.
Can be pulled out of the cutout 52, and a shift operation to another shift position can be performed.

The cam plate 38 is located at the lower limit when the shift position other than "P" is selected, and the detection switch 48 continues to detect the downward movement of the cam plate 38. Is demagnetized.

When the shift operation is performed from the other shift position to the "P" shift position, when the shift lever 16 is swung while the operation button 20 is being pressed, the day tent pin 18 is at the lower limit. The notch 52 of the located cam plate 38 is entered. After that, the shift lever 16 comes into contact with the stopper portion 34 of the day tent plate 12 to be prevented from moving. In this state, the day tent pin 18 is not in contact with the side inner peripheral surface 30 of the day tent hole 24 and the bottom surface of the inner peripheral surface of the notch 52. Thereafter, when the pressing operation of the operation button 20 is released, the operation button 20 is urged by the second spring (not shown) to return to the original position, and the day tent pin 18 is urged by the first spring (not shown). It moves upward and stops in a state of pressingly contacting the upper inner peripheral surface 26 of the day tent hole 24.

The cam plate 38 is also pulled up by the day tent pins 18 and moves upward together, the notch 38A faces the upper end of the cam stopper 40, and at the same time, the cam spring 38 is biased by the return spring 54 so that the cam stopper 40 is shown by a solid line in FIG. The state is indicated by.

When it is necessary to perform a shift operation from "P" to another shift position without turning on the ignition switch for vehicle maintenance or the like, the restraint release button 46 changes the biasing force of the return spring 56. The shift operation similar to the normal operation is performed while the pressing operation is performed against the resistance. Restraint release button 4
When 6 is pressed, the cam stopper 40 swings counterclockwise in FIG. 2 while pulling the plunger of the solenoid 42 against the urging force of the return spring 54, and then swings to the second position.
Since the posture shown by the broken line in the drawing does not hinder the downward movement of the cam plate 38, a shift operation to another shift position is possible.

As described above, in this embodiment, when the shift operation is performed from the other shift position to the "P" shift position, the shift lever 16 comes into contact with the stopper portion 34 of the day tent plate 12 to prevent the swing. In this state, the day tent pin 18 is not in contact with the side inner peripheral surface 30 of the day tent hole 24, so that friction with the side inner peripheral surface 30 does not hinder the upward movement.

Particularly, in the case of the present embodiment, since the day tent pin 18 is adapted to pull up the cam plate 38 as described above, in order to enable this without increasing the urging force of the first spring, The application of the present invention is extremely effective.

Further, in the case of the present embodiment, since the stopper portion 34 as the shift lever swing preventing means is formed on the day tent plate 12, the side inner peripheral surface 30 of the side portion of the day tent hole 24.
The accuracy of the separation distance with respect to is easy to obtain.

FIG. 4 shows a second embodiment of the present invention corresponding to FIG.

In this embodiment, a through hole 62 is formed in the stopper portion 34, a weld nut 64 is welded to the through hole 62 so as to correspond to a screw hole, penetrates the through hole 62 and is screwed into the weld nut 64. The stopper bolt 66 is fixed by a lock nut 68.

In this embodiment, the shift lever 16 is the stopper bolt 6
Since the rocking is prevented by contacting the distal end portion of 6, the projection length of the stopper bolt 66 is adjusted to adjust the side inner peripheral surface 30 of the daytent hole 24 and the daytent pin 18.
It is possible to improve the accuracy of the gap A between the and.

FIG. 5 shows a third embodiment of the present invention.

This embodiment differs from the second embodiment in that a cap-shaped cushion material 70 made of rubber or soft resin is capped on the tip of the stopper bolt 66.

For this reason, the shift lever 16 comes into contact with the cushion material 70 without directly contacting the stopper bolt 66, so that no metal-to-metal contact noise is generated and when the shift lever 16 comes into contact with the cushion material 70. The feeling of becomes soft and the operation feeling is improved.

The same effect can be obtained even if a cushion material is provided on the shift lever 16.

FIG. 6 shows a fourth embodiment of the present invention.

This embodiment differs from the first embodiment in that a cushion material 70 made of rubber or a soft resin is fixed to the stopper portion 34, and the shift lever 16 abuts on the cushion material 70 to prevent swinging. As in the third embodiment, the metal-to-metal contact noise is not generated, and the feel when the shift lever 16 contacts the cushion material 70 is soft and the operation feeling is good. improves.

In the case of this embodiment, several kinds of cushioning materials 70 having different thicknesses B are prepared and selectively arranged in accordance with the inevitable error, so that the accuracy of the predetermined gap A is secured. You can

Note that, as shown in FIG. 7, the same effect can be obtained by fixing the cushion material 70 to the shift lever 16.

[Advantages of the Invention] As described above, in the shift lever device for an automatic transmission according to the present invention, during the parking shift position, the day tent pin cannot move due to friction with the inner peripheral surface of the side part of the day tent hole. Has the effect of being able to prevent

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a first embodiment of a shift lever device for an automatic transmission according to the present invention, which is a view taken along the line II of FIG. 2, and FIG. 2 is applied to the first embodiment. FIG. 3 is a side view showing the outline of the entire shift lever device, FIG. 3 is an enlarged view of a part of FIG. 2 taken out, and FIG. 4 is a sectional view showing the second embodiment of the present invention in correspondence with FIG. FIGS. 5 and 5 are sectional views showing the third embodiment of the present invention corresponding to FIG. 1, and FIG. 6 is a sectional view showing the fourth embodiment of the present invention corresponding to FIG. FIG. 7 and FIG. 7 are cross-sectional views of main parts showing a modified example of the fourth embodiment corresponding to FIG. 12 ... Day tent plate, 16 ... Shift lever, 24 ... Day tent hole, 30 ... Side inner peripheral surface, 34 ... Stopper section.

Claims (1)

[Scope of utility model registration request] 1. In a shift position for parking located at one swing limit of a shift lever arranged so as to be swingable, a day tent pin provided on the shift lever is provided with a day tent hole provided on a day tent plate. A shift lever swing prevention device for an automatic transmission, comprising shift lever swing preventing means for contacting a shift lever to prevent swing of the shift lever before contacting an inner peripheral surface of a side portion.