JP2013193600A - Selector device of automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a selector device of an automatic transmission, capable of preventing the jump of a drive range without complicating a shift operation to a second range.SOLUTION: A selector device includes: a detent plate (14) for regulating the movement in a specific direction of a detent pin (13) in the non-operation state of an unlock button (12); a first stopper (21) for blocking the movement from a groove part (40) to another range of the detent pin but allowing the movement from another range in the operation state of the unlock button; and a means (23) for withdrawing the first stopper from the groove part in order to allow the movement from the groove part to the other range of the detent pin when a brake pedal is operated. The selector device further includes a second stopper (22, 24, 26) which is operatively linked to the brake pedal operation, is projected to a position corresponding to the second range of the detent plate, and regulates the movement of the detent pin to the second range.

Description

  The present invention relates to a selector device for an automatic transmission of an automobile, and more particularly to a shift lock mechanism for preventing erroneous operation in the selector device.

  In a selector device (AT selector) for an automatic transmission of an automobile, a desired shift position is selected by operating a shift lever. A general automobile has a parking range (P range), a reverse range (R range), a neutral range (N range), a drive range (D range), a second range (2 range), and a low range (L range). .

  Such a selector device prevents erroneous operation in each operation from the parking range to the reverse range, from the reverse range to the parking range, from the neutral range to the reverse range, and from the second range to the low range (in some cases, from the drive range to the second range). Therefore, it is necessary to operate a lock release button provided on the shift knob (except for the gate type AT selector lever device). Furthermore, a shift lock mechanism is provided that enables the lock release button operation only in the brake operation state in the operation from the parking range to the reverse range.

  In the above vehicle, in AT selector devices that do not require the operation of the unlock button to operate from the drive range to the second range, when the driver moves the shift lever to shift from the parking range to the drive range when the vehicle starts There is a possibility of jumping directly over the drive range and shifting directly to the second range.

  If the unlocking operation is set to the operation of the second range from the drive range, it is possible to prevent the drive range from jumping directly to the second range. However, for example, when shifting to the second range in order to use the engine brake, it is necessary to operate the shift lever while pressing the unlock button, and in particular, a shift operation to the engine brake is required to decelerate on a mountain road. If it occurs frequently, there is a problem that the unlock button operation is troublesome.

JP-A-8-91083 JP-A-8-270770

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a selector device for an automatic transmission that can prevent the drive range from jumping without complicating the shift operation to the second range. There is to do.

In order to solve the above problems, the present invention provides a selector device for an automatic transmission,
A shift lever (11) supported so as to be capable of swinging in order to perform a shift operation of a plurality of ranges including a parking range, a reverse range, a neutral range, a drive range, a second range, and a low range in that order;
A detent pin (13) provided on the shift lever so as to be reciprocally movable between a lock position for restricting its swing and an unlock position, and biased toward the lock position by a biasing member;
An unlock button (12) for moving the detent pin to the unlock position side against the bias of the biasing member;
A detent plate (14) for restricting movement of the detent pin in a specific direction when the lock release button is not operated, and moving from the neutral range, the drive range, and the second range to the reverse range. A first step portion (41) that restricts movement, a second step portion (42) that restricts movement from the neutral range, the drive range, and the second range to the low range, and movement from the reverse range to the parking range. A detent plate (14) that defines a third step portion (43) that restricts movement and a groove portion (40) that restricts movement from the parking range to another range;
A first stopper (21) that prevents movement of the detent pin from the groove to another range, but allows movement from the other range in the operation state of the unlock button;
Means (23) for retracting the first stopper from the groove to allow movement of the detent pin from the groove to another range when the brake pedal is operated;
In what comprises
In conjunction with the operation of the brake pedal, the detent plate further includes a second stopper (22, 24, 26) that protrudes to a position corresponding to the second range and restricts the movement of the detent pin to the second range. It is characterized by.

  With the above configuration, when the brake lever is operated from the stop state where the shift lever is in the neutral range and the shift lever is swung to the drive range side without operating the lock release button, the brake pedal is operated. The shift lever (detent pin) is locked to the drive range by the second stopper projecting in conjunction with it, and the shift to the second range is prevented from jumping over the drive range. On the other hand, if the brake pedal is not operated during driving, the second stopper is retracted, so it can be shifted to the second range without operating the unlock button, and decelerates on mountain roads. Even when the shift operation to the engine brake frequently occurs, the operation is not complicated.

  In a preferred aspect of the present invention, the second stopper (22) is configured to partially protrude with respect to the height of the second stepped portion. With this configuration, even when the second stopper is in the protruding state as described above, the movement from the drive range or the second range to the low range is restricted by the second step portion. Therefore, when shifting from the drive range to the second range, It is prevented from jumping over the range and shifting to the low range.

  In another preferred aspect of the present invention, the second step portion (242, 262) is formed integrally with the second stopper (24, 26). With this configuration, when the second stopper is in the retracted state, that is, when the brake pedal is not operated during traveling, the amount of operation of the lock release button can be reduced during the shift operation from the second range to the low range.

  In a further preferred aspect of the present invention, the second stopper (22, 24, 26) is mechanically connected to the first stopper (21) via a spring (25b, 26b), and the brake pedal In operation, when the detent pin is located in the second range, the second stopper is configured to remain in the retracted position by elastically deforming the spring. With this configuration, the second stopper can be operated by means (actuator) for retracting the first stopper, which is advantageous in simplifying the apparatus, reducing cost, and operating stability.

  The selector device for an automatic transmission according to the present invention can prevent jumping of the drive range without complicating the shift operation to the second range, and is advantageous in preventing erroneous operation.

It is a side view which shows each operation state (a) (b) of the selector apparatus which concerns on 1st Embodiment of this invention. It is a side view which shows each operation state (a) (b) of the selector apparatus which concerns on 2nd Embodiment of this invention. It is a side view which shows each operation state (a)-(c) of the selector apparatus which concerns on 3rd Embodiment of this invention. It is a side view which shows each operation state (a)-(c) of the selector apparatus which concerns on 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
In FIG. 1, the selector device 100 according to the first embodiment of the present invention includes a housing for performing a shift operation of a parking range P, a reverse range R, a neutral range N, a drive range D, a second range 2, and a low range L. 10 is provided with a shift lever 11 supported so as to be swingable.

  A shift knob (not shown) serving as a grip portion is provided at the upper end portion of the shift lever 11, and a lock release button 12 is attached to the shift knob. A rod (not shown) is inserted into the shift lever 11 so as to be slidable in the vertical direction, and the rod is biased upward in the figure by a detent pin spring (not shown). A detent pin 13 protrudes from the rod through a long hole 110 of the shift lever 11 to the side.

  A detent plate 14 is provided adjacent to the side of the shift lever 11. The detent plate 14 is fixed to the upper surface of the housing 10 at a lower portion thereof, and a detent hole 140 is opened at the center. At the upper edge of the detent hole 140, the detent pin 13 biased upward in the figure by the detent pin spring, the parking range P, the reverse range R, the neutral range N, the drive range D, the second range 2, and the low range Engaging portions (P, R, N, D, 2, L) that are engaged at respective swing positions corresponding to L are defined, and the detent pin 13 is moved in a specific direction between specific engaging portions. First to third step portions 41, 42, 43 and a groove portion 40 that restrict movement are defined.

  In other words, the first step portion 41 of the detent plate 14 is provided between the neutral range N and the reverse range R, and the reverse range from the neutral range N, the drive range D, and the second range 2 when the lock release button 12 is not operated. Restrict movement to R. The second step portion 42 is provided between the second range 2 and the low range L, and restricts the movement from the neutral range N, the drive range D, and the second range 2 to the low range L when the lock release button 12 is not operated. The third step portion 43 restricts the movement from the reverse range R to the parking range P when the lock release button 12 is not operated. The groove 40 restricts the movement from the parking range P to another range when the lock release button 12 is not operated.

  A detent pad 16 is disposed on the detent plate 14. A cam crest 15 is formed integrally with the detent pad 16, and the unevenness of the cam crest 15 corresponds to each shift range (P, R, N, D, 2, L). The detent spring 17 attached to the shift lever 11 is engaged with the cam crest 15 so that the shift lever 11 is positioned in each shift range.

  In the groove 40 corresponding to the parking range P of the detent plate 14, a first stopper 21 constituting a shift lock mechanism is provided so as to be able to advance and retreat. The first stopper 21 is supported by a pull rod 23a of an actuator 23 (solenoid) interlocked with a brake pedal (not shown) via a spring 23b. When the brake is turned on, the pull rod 23a is retracted and retracted from the groove portion 40. When the brake is off, the pull rod 23a protrudes to lock the groove 40, but when the detent pin 13 moves from the reverse range R to the parking range P, the lock is released by compressing the spring 23b.

  The selector device 100 having the basic configuration as described above further includes a second stopper 22 provided so as to be able to appear and retract at a position corresponding to the second range 2 of the detent plate 14. The second stopper 22 swings about the shaft 22a and is configured to be selectively positioned at either the protruding position shown in FIG. 1A or the immersion position shown in FIG. 1B.

  As a means for swinging the second stopper 22, an active type using a dedicated actuator and a passive type mechanically connected to the first stopper 21 are suitable. The passive swinging means will be described later in the third and fourth embodiments. As the active type, a mode in which the rod of the reciprocating type actuator is connected to the second stopper 22 or a mode in which the shaft 22a is rotated by the rotary type actuator is preferable. The single-acting type is preferable. Like the actuator 23 of the first stopper 21, the actuator of the second stopper 22 detects when the vehicle traveling speed is extremely low (for example, 5 km / h or less) by a vehicle speed sensor. You may go.

  Next, the operation based on the above embodiment will be described. When the vehicle is stopped and the shift lever 11 is in the parking shift P, the detent pin 13 is located in the groove 40 of the detent plate 14 and the first stopper 21 protrudes as shown by a broken line in FIG. However, the second stopper 22 is in the immersion position as shown in FIG.

  When starting the vehicle, first, when the brake pedal is depressed, the first stopper 21 retracts from the groove 40 in conjunction with the depression, and at the same time, the second stopper 22 protrudes into the second range 2. When the lock release button 12 is pushed in from this state to release the lock, the detent pin 13 can be moved to the reverse range R side from the groove 40 (parking range P) as in the prior art, and if the shift lever 11 is pulled forward, the reverse range Shifting to the neutral range N and the drive range D through the R or reverse range R is possible. However, since the second stopper 22 protrudes from the second range 2, the movement of the detent pin 13 toward the second range 2 is restricted and is not immediately shifted to the second range 2. However, when the lock release button 12 is pushed in to release the lock, the second stopper 22 is immersed and can be shifted from the drive range D to the second range 2 by the same operation as before.

  Next, when the brake pedal is not operated, the first stopper 21 protrudes and the second stopper 22 retracts from the second range 2 as shown in FIG. During traveling, the shift to the second range 2 can be performed without operating the unlock button 12. Therefore, even when the engine brake is frequently used on a downhill or the like, the operation is not complicated.

  On the other hand, when the brake pedal is operated, the second stopper 22 protrudes. However, as shown in FIG. 1A, the protruding amount of the second stopper 22 is relative to the height of the second step portion 42. Since it is partial, it can be shifted to the second range 2 by half-pressing the unlock button 12 in the drive range D, and it is prevented that the second step portion 42 jumps over the second range 2 and shifts to the low range L. Is done. In order to shift from the second range 2 to the low range L, the lock release button 12 may be pushed to release the lock as in the prior art.

  As described above, the lock release button 12 is operated against the reaction force by the detent pin spring through the rod, and therefore, a two-stage rate spring (or a double spring) is used for the detent pin spring to lock it. If the spring constant is increased by a stroke that is greater than or equal to half-pressing of the release button 12, an operational feeling can be obtained in the half-pressed state, and more stable operation can be performed.

  As a two-stage rate spring, for example, a coil spring having a small part and a large part of the winding pitch, or a coil spring in which a spacer is inserted between a part of pitches is used. It is only necessary to cause close contact or to elastically deform only one spring before the half-pressing stroke, and to elastically deform two or more springs (shift to the combined spring constant) after the half-pressing stroke.

  Further, when the brake pedal is operated in the state shifted to the second range 2, the brake pedal is operated while the second stopper 22 remains in the immersive position by elastic deformation of a spring (not shown) or by detection of the shift position. Permissible. This configuration will be described in detail in the third and fourth embodiments.

(Second Embodiment)
2A and 2B show a selector device 200 according to the second embodiment of the present invention. Since the basic configuration is the same as that of the first embodiment described above, the same members are omitted, or the same reference numerals are given and the description thereof is omitted, and changes will be described below. In FIG. 2, the selector device 200 is configured such that a second stepped portion 242 is formed integrally with the second stopper 24 and is swingable with the second stopper 24 about a shaft 24 a.

  In this aspect, when the second stopper 24 is in the retracted state, that is, when the brake pedal is not operated during traveling, the operation amount of the lock release button 12 can be reduced during the shift operation from the second range 2 to the low range L. There are advantages.

(Third embodiment)
3A to 3C show a selector device 300 according to the third embodiment of the present invention. In FIG. 3, the selector device 300 is configured such that the second stopper 22 is mechanically connected to the first stopper 21 via the spring 25 b and the connecting rod 25, and swings in conjunction with the first stopper 21 by the actuator 23. It is configured.

  On the projecting side of the second stopper 22, a detent pin 22c that defines the maximum projecting position is provided, and the difference between the stroke of the actuator 23 and the swing amount of the second stopper 22 can be absorbed by the elastic deformation of the spring 25b. In addition, since the second stopper 22 protrudes while being biased by the spring 25b, the position of the second stopper 22 is prevented from becoming unstable due to contact with the detent pin 13. Although the connecting rod 25 is integrally formed as a torsion bar by extending one arm of a spring 25b (spiral spring) as in the illustrated example, it is advantageous in reducing the number of parts and the number of assembling steps. It can also be constituted by a separate connecting rod connected through the vias.

  In this aspect, when starting the vehicle, when the first stopper 21 retracts from the groove 40 in conjunction with the operation of the brake pedal, as shown in FIG. 3B, the first stopper 21, the connecting rod 25, and the spring The second stopper 22 connected via 25b protrudes to the position of the second range 2. By releasing the lock from this state and pulling the shift lever 11 forward, the shift operation can be performed to the reverse range R, neutral range N, and drive range D. However, the movement of the detent pin 13 is restricted by the protruding second stopper 22, and the second Shifting to range 2 is prevented.

  When the detent pin 13 is located in the second range 2 when the brake pedal is operated, as shown in FIG. 3C, the spring 25b is elastically deformed so that the second stopper 22 remains in the retracted position. It has become.

(Fourth embodiment)
4A to 4C show a selector device 400 according to the fourth embodiment of the present invention. In the selector device 400, as shown in FIG. 4B, the second stopper 26 integrally formed with the second stepped portion 262 is guided so as to be able to protrude and retract at the edge of the detent plate 14, and is projected by the spring 26b. Is biased in the direction. A cam follower 26a protrudes from the side of the second stopper 26, and a cam 27 that engages with the cam follower 26a is provided integrally with the lower portion of the first stopper 21.

  As shown in FIG. 4A, when the first stopper 21 is in the protruding state, the cam 27 is in the forward movement position, and the second stopper 26 is immersed. When starting the vehicle, as shown in FIG. 4B, when the first stopper 21 moves away from the groove 40 in conjunction with the operation of the brake pedal, the cam 27 also moves backward, and the second stopper 26 is moved by the bias of the spring 26b. Protruding. By releasing the lock from this state and pulling the shift lever 11 forward, the shift operation can be performed to the reverse range R, neutral range N, and drive range D, but the movement of the detent pin 13 is restricted by the protruding second stopper 26, and the second Shifting to range 2 is prevented.

  Further, when the detent pin 13 is positioned in the second range 2 when the brake pedal is operated, as shown in FIG. 4C, the cam 27 moves backward together with the first stopper 21, but the cam 27 moves from the cam follower 26a. By detaching, the second stopper 26 can remain in the retracted position.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, in the third and fourth embodiments, the first stopper 21 and the second stoppers 24 and 26 are connected via the rod 25 (link mechanism) or the cam 27 (cam mechanism). Also, a known transmission mechanism such as a gear or a wire can be used.

DESCRIPTION OF SYMBOLS 10 Housing 11 Shift lever 12 Lock release button 13 Detent pin 14 Detent plate 21 1st stopper 22,24,26 2nd stopper 23 Actuator 25 Connecting rod 25b, 26b Spring 26a Cam follower 27 Cam 40 Groove part 41 First step part 42,242 , 262 Second step portion 43 Third step portion 100, 200, 300, 400 Selector device

Claims (4)

A selector device for an automatic transmission,
A shift lever supported so as to be capable of swinging in order to perform a shift operation of a plurality of ranges including a parking range, a reverse range, a neutral range, a drive range, a second range, and a low range in that order;
A detent pin that is provided on the shift lever so as to be reciprocally movable between a lock position that restricts its swing and an unlock position, and is biased toward the lock position by a biasing member;
A lock release button for moving the detent pin to the unlock position side against the bias of the biasing member;
A detent plate that restricts movement of the detent pin in a specific direction when the lock release button is not operated, and (a) moves from the neutral range, the drive range, and the second range to the reverse range. (B) a second step portion for restricting movement from the neutral range, the drive range and the second range to the low range, and (c) movement from the reverse range to the parking range. A detent plate that defines a third step portion that restricts movement, and (d) a groove portion that restricts movement from the parking range to another range;
A first stopper that prevents movement of the detent pin from the groove to another range, but allows movement from the other range, in an operation state of the unlock button;
Means for retracting the first stopper from the groove to allow movement of the detent pin from the groove to another range during braking operation;
In what comprises
The automatic transmission further comprising a second stopper that interlocks with the operation of the brake pedal and protrudes to a position corresponding to the second range of the detent plate and restricts movement of the detent pin to the second range. Selector device.   The selector device for an automatic transmission according to claim 1, wherein the second stopper is configured to partially protrude with respect to the height of the second stepped portion.   The selector device for an automatic transmission according to claim 1, wherein the second step portion is formed integrally with the second stopper.   The second stopper is mechanically connected to the first stopper via a spring, and the spring is elastically deformed when the detent pin is located in the second range when the brake pedal is operated. The selector device for an automatic transmission according to any one of claims 1 to 3, wherein the second stopper is configured to remain in a retracted position.

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