JP2004034863A - Shift lock mechanism of automatic transmission for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift lock mechanism capable of preventing and suppressing the occurrence of operation noise and increase in wear of constituent component when a P range position detection sensor is discontinued. <P>SOLUTION: When a shift lever is out of a P range position, a large width part 83 of a lock plate 8 enters a recessed part 72 of a rod 7. Moreover, a plunger 5 is pressed in the absorption direction X1 by a pressing part 84 provided on the lock plate 8 and the rod 7 also moves in the absorption direction X1 in accordance with it to press the rod 7 against the lock plate 8. Consequently, the rod 7 and the lock plate 8 do not move relatively when a brake pedal is stepped on and electricity is conducted into an electromagnetic coil, and the rod 7 and the lock plate 8 do not move relatively when current carrying is stopped (shut off) after conducting electricity into the electromagnetic coil to prevent the occurrence of operation noise due to their collision. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shift lock mechanism of an automatic transmission for a vehicle that restricts operation of a shift lever from a parking range position to another range position when a predetermined condition is not satisfied.
[0002]
[Prior art]
When the shift lever is in the parking range position (hereinafter referred to as P range position) and the brake pedal is depressed, the shift lock mechanism of the vehicle automatic transmission as described above energizes the electromagnetic coil to move the plunger and the rod. By driving, the engagement between the lock plate and the rod, which is linked to the knob of the shift lever, is released, and the operation of the shift lever from the P range position to another range position is permitted.
[0003]
Also, a P-range position detection sensor for detecting that the shift lever is at the P-range position is provided. When the shift lever is out of the P-range position and the brake pedal is depressed, energization of the electromagnetic coil is prohibited. The plunger and rod are kept stationary. This prevents the lock plate and the rod from colliding with each other each time the brake pedal is depressed, thereby preventing a sound from being generated.
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional shift lock mechanism, when the P range position detection sensor is abolished, the electromagnetic coil is energized every time the brake pedal is depressed even if the shift lever is out of the P range position. An operation noise is generated due to the collision between the plate and the rod, and a problem arises that abrasion of the components increases with the operation.
[0005]
The present invention has been made in view of the above points, and in a shift lock mechanism of an automatic transmission for a vehicle, the generation of operation noise and the increase in wear of components when a P-range position detection sensor is abolished are prevented or suppressed. The purpose is to:
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the invention, a lock plate (8) interlocked with a knob of a shift lever, an electromagnetic coil (1) that is energized when a brake is actuated to generate an electromagnetic force, and an electromagnetic coil A reciprocating member (5, 7) driven by the electromagnetic force of (1), wherein when the lock plate (8) is at a predetermined position and the electromagnetic coil (1) is in a non-energized state, ) And the reciprocating members (5, 7) are engaged with each other to restrict the operation of the shift lever in a shift lock mechanism of an automatic transmission for a vehicle, when the lock plate (8) is at a position other than the predetermined position. A push portion (84) for pushing the reciprocating member (5, 7) in a predetermined direction is provided on the lock plate (8), and the reciprocating member is moved by the movement of the reciprocating member (5, 7) by the pushing portion (84). (5,7) is rock play Characterized in that it is configured to be pressed against the (8).
[0007]
According to this, when the lock plate is at a position other than the predetermined position, in other words, when the shift lever is at a position other than the P range position, the electromagnetic coil is energized because the reciprocating member is pressed against the lock plate. The reciprocating member and the lock plate do not move relative to each other, and the reciprocating member and the lock plate do not move relative to each other when the energization is stopped (cut off) after energizing the electromagnetic coil. It is possible to prevent or suppress the generation of operation noise and the increase in wear of the components due to the collision with the plate.
[0008]
In addition, this makes it possible to abolish the P range position detection sensor, thereby reducing costs.
[0009]
The reciprocating member (5, 7) is divided into a plunger (5) including a magnetic metal part attracted by the electromagnetic force of the electromagnetic coil (1) and a plunger (5). And a rod (7) that is connected and engages with the lock plate (8) to regulate the operation of the shift lever, and the plunger (5) is pushed by the pushing portion (84) to move. The rod (7) may be pressed against the lock plate (8).
[0010]
According to the third aspect of the present invention, the lock plate (8) has the notch (81), and the rod (7) has a structure in which the lock plate (8) moves substantially in the moving direction of the rod (7). When the lock plate (8) is at a predetermined position and the electromagnetic coil (1) is in a non-energized state, the notch (72) of the lock plate (8) is inserted in a vertically movable state. 81), and the plunger (5) is pushed and moved by the pushing part (84), so that the concave part (72) of the rod (7) is moved to the lock plate (8). ) May be pressed.
[0011]
In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means described in embodiment mentioned later.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 8 show a shift lock mechanism of an automatic transmission for a vehicle according to an embodiment of the present invention. FIG. 1 is a plan view showing a state in which the shift lock mechanism is not energized, and FIG. 3 is a cross-sectional view taken along line AA of FIG. 3, FIG. 3 is a view taken in the direction of arrow B in FIG. 1, FIG. 4 is a plan view of a main part showing a state at the time of energization, and FIG. It is. FIGS. 4 and 5 show other components in a deleted manner in order to clarify the positional relationship, the operating state, and the like of the plunger 5, the rod 7, and the lock plate 8.
[0013]
6 (a) is a front view of the plunger, FIG. 6 (b) is a plan view of the plunger, FIG. 7 (a) is a front view of the rod, FIG. 7 (b) is a plan view of the rod, FIG. 8) is a right side view of the rod, FIG. 8A is a front view of the lock plate, FIG. 8B is a plan view of the lock plate, and FIG. 8C is a right side view of the lock plate.
[0014]
An electromagnetic coil 1 that generates an electromagnetic force when energized is mounted on the outer periphery of a resin spool 2, and a plate-like first yoke 31 made of a magnetic metal is partially buried and arranged at one end of the spool 2. At the same time, the other end side and both side surfaces of the spool 2 are surrounded by the second yoke 32 made of a magnetic metal bent in a U-shape. Both yokes 31 and 32 (hereinafter referred to as the yokes 3) form a magnetic path of the magnetic flux induced by the electromagnetic coil 1. The electromagnetic coil 1, the spool 2 and the yoke 3 are housed and arranged in a U-shaped wall 41 formed on a resin base 4, and the yoke 3 is connected to the base 4.
[0015]
A hole 21 is formed in the center of the spool 2. A part of the plunger 5 that is sucked in the suction direction X <b> 1 by the electromagnetic force of the electromagnetic coil 1 is inserted into the hole 21, and the plunger 5 is sucked. A spring 6 for urging the plunger 5 in a direction X2 (hereinafter referred to as a spring force direction) opposing the direction X1 is inserted.
[0016]
The plunger 5 includes a substantially cylindrical main body 51 made of a magnetic metal, a resin connecting portion 52 in which the main body 51 is insert-molded, and two rubber cushioning members 53 assembled to the connecting portion 52. 54.
[0017]
The plunger 5 is integrally formed with two cylindrical stopper pins 521 and 522 extending radially outward of the plunger 5, and the two stopper pins 521 and 522 are displaced by 180 ° in the circumferential direction. The cylindrical stopper members 53 and 54 are fitted to the two stopper pins 521 and 522, respectively.
[0018]
Of the two stopper pins 521 and 522, the stopper pin 522 located on the axial end side of the plunger 5 is attached to the tip of a leg 523 extending radially outward from the end face of the connecting portion 52. Is formed.
[0019]
The range of movement of the plunger 5 in the reciprocating direction X is defined by a stopper 22 formed integrally with the spool 2. Specifically, the first buffering member 53 of the plunger 5 is inserted into the through hole 23 formed in the stopper portion 22, and the first buffering member 53 contacts the first stopper surface 221 of the stopper portion 22 when power is not supplied. The first buffer member 53 comes into contact with the second stopper surface 222 of the stopper portion 22 at the time of contact and energization, so that the movement range of the plunger 5 is defined.
[0020]
The resin rod 7 assembled on the base 4 has a through hole 71 into which the second buffer member 54 of the plunger 5 is inserted, a concave portion 72 into which the lock plate 8 is slidably inserted, and a lock plate 8. An engaging portion 73 to be engaged is formed. When the second buffer member 54 of the plunger 5 is inserted into the through hole 71, the plunger 5 and the rod 7 are connected, and the plunger 5 and the rod 7 operate integrally in the reciprocating direction X. I have. The reciprocating member according to the present invention includes the plunger 5 and the rod 7.
[0021]
The rod 7 is held by two guides 42 formed on the base 4 so as to be movable in the reciprocating direction X. A guide surface 421 is formed on the guide portion 42 at a predetermined interval W in a direction Y orthogonal to the reciprocating direction X. The guide surface 421 allows the displacement of the rod 7 in the orthogonal direction Y. It is being regulated.
[0022]
The resin lock plate 8 is formed with two notches 81 and 82 and a wide portion 83 located between the two notches 81 and 82, and the first notch 81 when no power is supplied. It is assembled on the base 4 such that the engaging portion 73 of the rod 7 enters therein. A lever pin 9 interlocked with a knob of a shift lever of an automatic transmission (not shown) is inserted into the second notch 82. The size of the wide portion 83 in the reciprocating direction X is set slightly smaller than the size of the recess 72 in the reciprocating direction X so that the lock plate 8 can slide in the concave portion 72 of the rod 7.
[0023]
Further, the lock plate 8 includes an L-shaped push portion 84 protruding from the wide portion 83 of the lock plate 8. When the lock plate 8 moves downward in FIG. 1, the pushing portion 84 comes into contact with the leg portion 523 of the plunger 5 and pushes the plunger 5 in the suction direction X1.
[0024]
1 to 3 show a state in which the shift lever is in the P range position and the brake pedal is not depressed. At this time, since the electromagnetic coil 1 is in a non-energized state, the plungers 5 and The rod 7 is urged by the spring 6 to move to a position where the first buffer member 53 of the plunger 5 contacts the first stopper surface 221 of the stopper portion 22. In this state, the engagement portion 73 of the rod 7 is engaged with the first notch portion 81 of the lock plate 8, and the downward movement of the lever pin 9 and the lock plate 8 in FIG. Operation is regulated.
[0025]
On the other hand, when the shift lever is in the P range position and the brake pedal is depressed, the electromagnetic coil 1 is energized and the plunger 5 is attracted by the electromagnetic attraction, and the plunger 5 and the rod 7 are moved to the first position of the plunger 5. The buffer member 53 moves to a position where the buffer member 53 contacts the second stopper surface 222 of the stopper portion 22. In this state, since the engaging portion 73 of the rod 7 is disengaged from the first notch 81 of the lock plate 8, the lever pin 9 and the lock plate 8 can be moved downward in FIG. It becomes possible.
[0026]
Once the lock plate 8 is moved downward in the plane of FIG. 1, the wide portion 83 of the lock plate 8 enters the recess 72 of the rod 7 as shown in FIGS. The movement in the reciprocating direction X is restricted. Therefore, even when the brake pedal is depressed and the electromagnetic coil 1 is energized when the shift lever is at a position other than the P range position, the movement of the rod 7 in the reciprocating direction X is restricted, thereby suppressing the operation noise and reducing the components. Wear can be suppressed.
[0027]
By the way, if there is a clearance between the end surface 831 of the wide portion 83 on the spring force direction X2 side and the end surface 721 of the concave portion 72 facing the end surface 831, when the electromagnetic coil 1 is energized, the rod 7 The rod 7 moves in the suction direction X1 by the amount of the clearance, and the rod 7 and the lock plate 8 collide with each other to generate an operation sound.
[0028]
Further, when the energization of the electromagnetic coil 1 is stopped after the rod 7 has been moved in the suction direction X1 by the clearance by the energization of the electromagnetic coil 1 as described above, the rod 7 is moved to the original position by the urging force of the spring 6. Therefore, the rod 7 and the lock plate 8 collide with each other, and an operation sound is generated.
[0029]
In order to suppress the operation noise caused by the collision between the rod 7 and the lock plate 8, the lock plate 8 is provided with a pressing portion 84 in the present embodiment. That is, when the lock plate 8 is moved to the position shown in FIGS. 4 and 5, the pushing portion 84 of the lock plate 8 comes into contact with the leg portion 523 of the plunger 5, and the plunger 5 is pushed in the suction direction X1. As a result, the rod 7 also moves in the suction direction X1, the end surface 721 of the concave portion 72 abuts against the end surface 831 of the wide portion 83 on the spring force direction X2 side, and the clearance between these end surfaces becomes zero, and the operation due to collision occurs. Sound is suppressed.
[Brief description of the drawings]
FIG. 1 is a plan view showing a state when power is not supplied to a shift lock mechanism according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a view taken in the direction of arrow B in FIG. 1;
FIG. 4 is a plan view of a main part showing a state when power is supplied to the shift lock mechanism of FIG. 1;
FIG. 5 is a sectional view taken along line CC of FIG. 4;
6 (a) is a front view of the plunger 5 of FIG. 1, and FIG. 6 (b) is a plan view thereof.
7A is a front view of the rod 7 of FIG. 1, FIG. 7B is a plan view thereof, and FIG. 7C is a right side view thereof.
8A is a front view of the lock plate 8 of FIG. 1, FIG. 8B is a plan view thereof, and FIG. 8C is a right side view thereof.
[Explanation of symbols]
1: electromagnetic coil, 5: plunger (reciprocating member),
7: rod (reciprocating member), 8: lock plate, 84: pushing part.

Claims (3)

A lock plate (8) interlocking with a shift lever knob;
An electromagnetic coil (1) that is energized when a brake is activated to generate an electromagnetic force;
Reciprocating members (5, 7) driven by the electromagnetic force of the electromagnetic coil (1),
When the lock plate (8) is at a predetermined position and the electromagnetic coil (1) is in a non-energized state, the lock plate (8) and the reciprocating members (5, 7) are engaged to shift the shift lever. Shift lock mechanism of an automatic transmission for a vehicle that regulates the operation of
When the lock plate (8) is at a position other than the predetermined position, a pusher (84) for pressing the reciprocating member (5, 7) in a predetermined direction is provided on the lock plate (8),
The vehicle is characterized in that the reciprocating member (5, 7) is pressed against the lock plate (8) by the movement of the reciprocating member (5, 7) by the pressing portion (84). Lock mechanism for automatic transmissions. The reciprocating member (5, 7) is connected to the plunger (5) including a magnetic metal part attracted by the electromagnetic force of the electromagnetic coil (1), the plunger (5), and the lock plate. A rod (7) that engages with (8) to regulate the operation of the shift lever;
The rod (7) is configured to be pressed against the lock plate (8) when the plunger (5) is pressed and moved by the pressing portion (84). A shift lock mechanism for an automatic transmission for a vehicle according to the above. The lock plate (8) has a notch (81),
The rod (7) has a concave portion (72) into which the lock plate (8) is inserted in a state in which the lock plate (8) can be moved in a direction substantially perpendicular to the moving direction of the rod (7). An engagement portion (73) that is engaged with a notch (81) of the lock plate (8) when the electromagnetic coil (1) is at a predetermined position and the electromagnetic coil (1) is in a non-energized state;
When the plunger (5) is pushed and moved by the pushing part (84), the concave portion (72) of the rod (7) is pressed against the lock plate (8). The shift lock mechanism for a vehicle automatic transmission according to claim 2.

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