JP4269555B2 - Shift lock device for column type automatic transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shift lock device for a column type automatic transmission, and more particularly to a shift lock device for a column type automatic transmission in which a shift device is attached to a steering column.
[0002]
[Prior art]
In an automatic transmission mounted on a vehicle, there is a shift device in which a shift lever is positioned in a parking (P) range, a reverse (R) range, a neutral (N) range, and a drive (D) range to switch to each state. Is provided. Some shift devices are provided with a shift lock device that prevents the shift lever from being moved from the parking (P) range to another range unless the brake pedal is depressed.
[0003]
This shift lock device has a mechanical type and an electric type. The electric type uses a solenoid, operates a shift lock when the solenoid is de-energized, and releases a shift lock when the solenoid is energized. There are shift lock devices and energized shift lock devices that operate the shift lock when the solenoid is energized and release the shift lock when the solenoid is not energized.
[0004]
In other words, the non-energized shift lock device is provided with a device base that is attached to the steering column of the vehicle, and the shift lever can be pivoted in the axial direction of the steering column and rotated around the shaft. A cam member that is attached and rotated by a solenoid is provided, and when the solenoid is not energized, the cam member is rotated to an engagement position with the shift lever to restrict the operation of the shift lever.
[0005]
Such shift lock devices are disclosed in, for example, Japanese Patent Laid-Open Nos. 2000-21393, 2000-103252, 2000-85400, and 11-115528. Japanese Patent Laid-Open No. 2000-21393 discloses a manual shift lock release mechanism of an instrument panel mounting type (column type) speed change operation device formed by a separate unit independent of the main body of the speed change operation device. It is. Japanese Patent Application Laid-Open No. 2000-103252 discloses a shift lock device for a column type automatic transmission, a transmission mechanism for transmitting a shift lever operation by a driver to the transmission, and a transmission mechanism in a predetermined driving state. The shift lock mechanism that restricts the operation of the vehicle is disposed at substantially the same position in the front-rear direction of the vehicle and at positions opposite to each other in the width direction of the vehicle with the steering column interposed therebetween. Japanese Patent Application Laid-Open No. 2000-85400 discloses a shift lock device for an automatic transmission in which a shift lock mechanism and thus a shift operation input device is prevented from expanding in the shift direction or the select direction. Japanese Patent Application Laid-Open No. 11-115528 is provided with a connecting link mechanism so that the key lock link is directly interlocked with the cylinder side lock link of the key cylinder.
[0006]
[Problems to be solved by the invention]
By the way, in the conventional energization type shift lock device, when the engine key is moved from the “LOCK” position to the “ACC” position, the solenoid is de-energized and the shift lock is released. Only when the key is in the “LOCK” position, the shift lock does not work, but the shift lever can be moved in the event of an abnormality such as a solenoid failure (when power is not supplied).
[0007]
On the other hand, in the non-energized shift lock device, the shift lock can be operated even when the engine key is not in the “LOCK” position, and the reliability of operation is improved compared to the energized shift lock device. On the other hand, the shift lever cannot be moved when there is an abnormality such as a solenoid failure (when power is not supplied), so it is necessary to provide a manual release means for the shift lock.
[0008]
In this case, it is necessary to extend the manual release lever for operating the solenoid to a position where the driver's seat can be operated or to provide an opening for operation in the driver's seat as manual release means for the shift lock. For this reason, there has been a disadvantage that the shift lock device becomes complicated.
[0009]
In addition, in a vehicle equipped with a shift device in a steering column, the solenoid and the shift lock device are arranged inside the steering column cover with little space, so that the manual release lever needs to be arranged in a compact manner. was there.
[0010]
[Means for Solving the Problems]
Therefore, in order to eliminate the above-mentioned inconveniences, the present invention is provided with a device base that is attached to a steering column of a vehicle, and a shift lever is pivoted in the axial direction of the steering column and rotated around the shaft. And a cam member that is rotated by a solenoid, and when the solenoid is de-energized, the cam member is rotated to a position that engages with the shift lever to restrict the operation of the shift lever , In a shift lock device for a column-type automatic transmission having manual release means for allowing the operation of the shift lever by rotating the cam member by manual operation, the cam member extends in parallel with the central axis of the steering column. A cam rotation shaft is pivotally supported, and is disposed below the steering column, and the cam member is mounted on the cam rotation shaft. When viewed from the axial direction of the rotary shaft, the shift lever engaging portion that engages with the shift lever and the manual release means abutting portion that contacts the manual release means are sandwiched by a vertical line passing through the cam rotation shaft. A cylindrical recess is provided on the inner side of the lower column cover which is disposed at a position facing each other and covers the lower side of the steering column, and protrudes toward the manual release means contact portion. A shaft-like release rod having a release piece abutting on the part and a release button sized to close the opening of the recess can be moved in the axial direction through the return spring into the recess as the manual release means It is characterized by having been arranged in .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The present invention, as compared with the case of disposing the cam member and a lever member and a solenoid in the outer peripheral direction of the steering column, it is possible to secure a space territory of the driver's seat was also arranged a cam member on the driver's side Thus, the shift lock releasing member that contacts the cam member can be disposed close to the driver's seat, and the operability can be improved.
[0012]
【Example】
Embodiments of the present invention will be described in detail and specifically with reference to the drawings. 1 to 15 show a first embodiment of the present invention. 1 to 11, reference numeral 2 denotes a steering shaft of a vehicle (not shown) equipped with an automatic transmission, and 4 denotes a cylindrical steering column (column tube) that covers the steering shaft 2. Although not shown, a steering wheel is attached to the steering shaft 2 on the driver's seat side.
[0013]
The steering column 4 is provided with a column type shift device 8 having a shift lever 6. In this column type shift device 8, the shift lever 6 is disposed on an instrument panel (not shown) in the vicinity of the steering wheel. The shift lever 6 includes a pipe-shaped lever main body 10 and a grip 14 provided with an overdrive button 12 on the distal end side. The shift lever 6 switches the automatic transmission to various states by a predetermined selection operation.
[0014]
The shift device 8 includes a device base 16. The device base 16 is formed by integrally forming a column holding portion 18 and a shift lever holding portion 20. As shown in FIG. 3, the column holding portion 18 has a key cylinder side base insertion opening 22 on the inner peripheral surface, and the key cylinder side base insertion opening 22 serves as a center of the steering column 4. It is attached to the steering column 4 together with a substantially semicircular key cylinder side base portion 26 that is rotatably connected to a base portion connecting pin 24 laid horizontally along the axis C direction. Further, as shown in FIGS. 1 and 5, the column holding portion 18 and the key cylinder side base portion 26 are connected by a base connecting pin 32 inserted into the device base pin hole 28 and the key cylinder side base pin hole 30. Then, it is fixedly provided on the outer periphery of the steering column 4.
[0015]
A shift lever rotating shaft 34 is rotatably provided along the central axis C direction of the steering column 4 at a substantially central portion of the end surface on the driver's seat side of the shift lever holding portion 20 of the device base 16. As shown in FIG. 6, the shift lever rotating shaft 34 protrudes from the end surface of the shift lever holding portion 20 on the rear side of the vehicle on the driver seat side through a lever side connecting member 36 and a rotation base 38. The base end side of the lever 6 is connected. A lever side connecting member 36 is fixed to the base end side of the shift lever 6 by a fixing bolt 40 and attached integrally. The lever side connecting member 36 is attached to the rotary base 38 by being inserted and loosely fitted to the rotary base 38 by a pivot pin 42. The lever side connecting member 36 is attached to the rotary base 38 in the axial direction of the steering shaft 2, i. 1 (shown by “pull direction”). Therefore, the shift lever 6 can be rotated (selected) around the axis of the steering shaft 2 around the shift lever rotating shaft 34, and can be swung (pulled) in the axial direction of the steering shaft 2 by the presence of the pivot pin 42. Is possible. A pull restricting lever 36 </ b> A as a claw portion that protrudes through the rotation base 38 is integrally provided on the distal end side of the lever side coupling member 36.
[0016]
Further, as shown in FIG. 11, a pivot shaft 44 is formed integrally with the lower portion of the rotation base 38 so as to be directed downward. The pivot shaft 44 is disposed in a pivot groove 50 of one end 48 </ b> A of an L-shaped select arm 48 that rotates about a select arm shaft 46 attached to the device base 16. The pivot groove 50 is closed by a groove closing member 52 attached to one end 48A of the select arm 48. A select pin 54 is attached to the distal end side of the other end 48B of the select arm 48 so as to protrude downward. The select pin 54 is provided with a select cable (not shown) connected to the automatic transmission.
[0017]
A moderation mechanism 56 is provided between the device base 16 and the rotation base 38 as shown in FIGS. The moderation mechanism 56 includes a moderation plate 58 that stands integrally and integrally with the lever side coupling member 36 of the shift lever 6, and each moderation step (P, R, N, D) of the moderation plate 58 on the tip side. 2, L) and a roller holding plate 66 fixed to a moderation side mounting portion 62 on the upper portion of the apparatus base 16 by a moderation mounting bolt 64.
[0018]
Further, a detent mechanism 68 is provided between the device base 16 and the lever side connecting member 36 as shown in FIGS. The detent mechanism 68 includes a detent pin 70 formed integrally with the lever-side connecting member 36 and detent steps (P, R, N, D, 2, L) with which the detent pin 70 engages. The detent plate 76 is fixedly attached to the detent side mounting portion 72 of the base portion 16 by detent mounting pins 74 and 74.
[0019]
The shift device 8 is provided with a shift lock device 78 as shown in FIGS. This shift lock device 78 is a non-energized lock system, and the shift lever 6 cannot be selected from the parking (P) range unless the engine key is turned on and the brake pedal (not shown) is depressed. Is. That is, one end side of the solenoid extension arm 80 is attached to the lower surface of the shift lever holding portion 20 of the device base 16 by the arm attachment bolt 82. The other end of the solenoid extension arm 82 extends forward of the vehicle. A solenoid 88 is fixedly provided by a solenoid fixing bracket 86 to the solenoid mounting portion 84 on the other end side of the solenoid extending arm 82 that extends forward of the vehicle. The solenoid 88 is provided with a plunger 92 protruding from the solenoid main body 90 toward the rear side of the vehicle on the driver's seat side so as to be able to move forward and backward. The plunger 92 is loosely fitted with a plunger spring 96 that urges the plunger 92 so as to push the plunger 92 toward the rear side of the vehicle between a spring support 94 provided in a flange shape on the distal end side of the plunger 92 and the solenoid body 90. Is provided. A socket 98 is attached to the solenoid body 90. The socket 98 is provided with a solenoid-side electrical cable 100 that communicates with the solenoid body 90 and a lever-side electrical cable 102 that communicates with the overdrive button 12 of the shift lever 6.
[0020]
On the end surface of the device base 16 on the driver's seat side, a cam mounting portion 104 is provided so as to protrude toward the driver's seat along the central axis C direction of the steering column 4 so as to face the pull restricting lever 36A. A cam rotation shaft 106 along the direction of the central axis C of the steering column 4 is attached to the cam attachment portion 104. A substantially fan-shaped shift lock cam 108 as a cam member is pivotally attached to the cam rotation shaft 106. As shown in FIGS. 3 and 4, the shift lock cam 108 is disposed below the steering column 4. The shift lever engaging portion 110 and the center axis C of the steering column 4 are disposed on the outer peripheral end surface of the driver seat side. The manual release means abutting portion 112 is provided, and the shift lever engaging portion 110 as the shift lock member and the manual release means abutting portion 112 are disposed on both sides of the vertical line V passing through the cam rotation shaft 106. Yes. Further, the rotation base 38 has a claw-shaped cam restriction that abuts against the side surface of the shift lever engaging part 110 to restrict the operation of the shift lock cam 108 when the shift lever 6 is in a position other than the parking (P) range. The part 114 is provided integrally. In the shift lock state, the detent mechanism 68 has a configuration in which the detent pin 70 cannot escape from the parking (P) step portion of the detent plate 76 even if the shift lever 6 is swung in the pull direction. Furthermore, a shift lock stopper 108A is provided on the end surface of the shift lock cam 108 on the vehicle front side opposite to the shift lever engaging portion 110. Furthermore, as shown in FIG. 5, a stopper groove 16 </ b> A capable of operating the shift lock stopper 108 </ b> A in a predetermined manner is formed on the end surface of the device base 16 on the driver seat side.
[0021]
The shift lock cam 108 and the solenoid 88 are connected by a shift lock arm 116 that is a lever member. One end of the shift lock arm 116 is loosely fitted and engaged with the arm side engaging groove 118 of the shift lock cam 108, and the other end is rotated by the pivot bolt 120 in the middle of the solenoid extension arm 80. It is provided to be movable. In the middle of the shift lock arm 116, a distal end side of the plunger 92 of the solenoid 88 is provided so as to be relatively movable by the connecting pin 122. Therefore, the shift lock cam 108 is rotated around the cam rotation shaft 106 by the forward and backward movement of the plunger 92 of the solenoid 88 via the shift lock arm 108. Further, when the solenoid 88 is not energized, the end surface of the pull restricting lever 36A on the vehicle front side abuts on the end surface of the shift lever engaging portion 110 of the shift lock cam 108, and the shift lever 6 cannot be pulled. The shift lock cam 108 is rotated to the engagement position with the shift lever 6 to restrict the operation of the shift lever 6.
[0022]
Accordingly, the steering column 4 includes a shift lock cam 108 and a shift lock arm 116 that communicates the shift lock cam 108 with the solenoid 88 sequentially from the driver's seat side to the front of the vehicle along the central axis C of the steering column 4. And a solenoid 88. Further, the shift lock arm 116 is pivoted forward of the vehicle.
[0023]
The shift device 8 is provided with manual release means 124. The manual release means 124 is for manually rotating the shift lock cam 108 to release the engagement with the shift lever 6. As shown in FIG. 5, the lower column cover 126 covering the lower side of the steering column 4. It is installed and attached. Therefore, the shift lock cam 108 and the manual release means 124 are disposed on the driver's seat side.
[0024]
As shown in FIGS. 12 and 13, the manual release means 124 includes a release rod 130 having a release piece 128 as a shift lock release member on one end so as to contact the manual release means contact portion 112 of the shift lock cam 108. The release button 134 located in the recess 132 of the lower column cover 126 on the other end side of the release rod 130, and the step portion 136 and the button end 138 forming the recess 132 of the lower column cover 126. The return spring 142 is fitted to the large-diameter portion 140. A boss hole 144 through which the release rod 130 is inserted is formed in the stepped portion 136 of the recess 132 of the lower column cover 126. The release piece 128 is made of, for example, an off-the-shelf clamp head, and is narrowed when inserted into the boss hole 144 from below. However, the release piece 128 expands when it passes through the boss hole 144 and then does not fall downward from the boss hole 144 Is. The release rod 130 can be moved up and down by a distance L.
[0025]
Next, the operation of the first embodiment will be described.
[0026]
The shift lock device 78 is a non-energized lock system, and the shift lever 6 cannot be selected from the parking (P) range unless the engine key is in the “ON” position and the brake pedal (not shown) is depressed. However, when the shift lever 6 is in the parking (P) range and the battery runs out and power cannot be supplied, the solenoid 88 cannot be energized and the shift lock state is released. In other words, even if the shift lever 6 is swung in the pull direction, the detent pin 70 cannot come out of the parking (P) step portion of the detent plate 76, and the select operation of the shift lever 6 becomes impossible. The shift lever 6 is set to the neutral (N) range and the vehicle cannot be moved.
[0027]
Therefore, in this embodiment, as shown in FIGS. 4, 14, and 15, normally, the solenoid 88 is energized, the plunger 92 of the solenoid 88 is retracted (X direction in FIG. 4), and the shift lock cam 108. When the operation of rotating (Y direction in FIG. 4) is abnormal, the release button 134 is pushed from below, and the shift lock cam 108 is rotated (Z direction in FIG. 15) via the release rod 130, thereby pull pull lever 36A is opened, the pull operation of the shift lever 6 to the driver's seat side becomes possible, the detent pin 70 is escaped from the parking (P) step of the detent plate 76, and thus the shift lever 6 is rotated in the select direction. This makes it possible to move the shift lever 6 to the neutral (N) range and move the vehicle. It made.
[0028]
That is, when the engine key is set to the “ACC” position and the release button 134 is pressed from below, the shift lock cam 108 rotates, the shift lock cam 108 is disengaged from the pull restricting lever 36 </ b> A of the shift lever 6, and the shift lever 6 Pull / select operations are possible.
[0029]
As a result, in this embodiment, the shift lock cam 108 and the shift lock cam 108 are connected to the solenoid 88 sequentially from the driver's seat side to the front of the vehicle along the central axis C of the steering column 4. Since the shift lock arm 116 and the solenoid 88 are provided, and the manual release means abutting portion 112 is abutted on the shift lock cam 108, a shift lock as a cam member in the outer peripheral direction of the steering column 4 is provided. Compared to the case where the cam 108, the shift lock arm 116 as a lever member, and the solenoid 88 are arranged, a space at the knee of the driver's seat can be secured, and the shift lock cam 108 is arranged on the driver's seat side. Therefore, the manual release means 124 that contacts the shift lock cam 108 is disposed close to the driver's seat. , It is possible to improve operability.
[0030]
The shift lock cam 108 is disposed below the steering column 4, and manual release means 124 for releasing the engagement with the shift lever 6 by rotating the shift lock cam 108 by manual operation is provided. Is attached to the lower column cover 126 that covers the lower side of the steering column 4, so that the manual release means 124 with few opportunities for use is disposed in a visually inconspicuous position, and the appearance around the driver's seat is improved. In addition to being complicated, when the shift lock release button 134 is operated, the lower column cover 126 can be directly operated without being removed, and the operability can be improved.
[0031]
Further, the shift lock cam 108 is pivotally supported by a cam rotation shaft 106 disposed in parallel with the central axis C of the steering column 4, and a shift lever engaging portion 110 and a manual release means abutting portion 112 are provided at the outer peripheral portion. And the shift lever engaging portion 110 and the manual release means abutting portion 112 are disposed on both sides of the vertical line passing through the cam rotation shaft 106, so that the rotation base portion 38 supporting the shift lever 6 and the manual release means are provided. 124, the shift lever 6 and the manual release means 124 can be arranged without being offset in the direction of the central axis C of the steering column 4 with the cam rotation shaft 106 interposed therebetween. Miniaturization can be achieved.
[0032]
Furthermore, in this embodiment, the shift lock can be released without using a tool when the shift lock is released, which is convenient. Further, when the shift lock is released, an excessive force is not applied to the shift lock cam 108, and the operation can be performed smoothly. Furthermore, the number of parts of the manual release means 124 is small, and the configuration can be simplified. In addition, if a ready-made clamp head is used for the release piece 128, it is not necessary to separately manufacture parts and the cost can be reduced. Further, the manual release means 124 is easy to assemble, no adjustment is required, and the assemblability can be improved. Further, the return spring 142 is fitted into the release button 134 and only fitted into the dedicated boss hole 144 of the lower column cover 126, so that the configuration can be simplified.
[0033]
FIG. 16 shows a second embodiment of the present invention.
[0034]
In the second embodiment, portions that perform the same functions as those of the first embodiment will be described with the same reference numerals.
[0035]
The features of the second embodiment are as follows. That is, a solenoid 88 is provided on the stepped portion 136 of the lower column cover 126, and a plunger 152 that protrudes in the vertical direction of the solenoid body 90 is provided in the solenoid 88 so as to be movable back and forth. A piece 154 is provided, a flange-shaped release button 156 is provided at the lower end of the plunger 152, and a return spring 158 is provided between the release button 156 and the stepped portion 136.
[0036]
According to the configuration of the second embodiment, a shift lock arm as a lever member is not required, the configuration can be simplified, and maintenance and inspection can be facilitated.
[0037]
【The invention's effect】
As is apparent from the above detailed description, according to the present invention, compared to the case where the cam member, the lever member, and the solenoid are arranged in the outer peripheral direction of the steering column, the knee space of the driver's seat can be secured, Further, since the cam member is disposed on the driver's seat side, the shift lock releasing member that contacts the cam member can be disposed in the vicinity of the driver's seat, thereby improving operability.
[Brief description of the drawings]
FIG. 1 is a perspective view of a column type shift device.
FIG. 2 is a front view from the front side of the vehicle as indicated by an arrow II in FIG.
FIG. 3 is a side view of the shift device according to arrow III in FIG. 1;
4 is a side view of the shift lock device according to arrow IV in FIG. 5;
FIG. 5 is a rear view from the driver's seat side of the shift device.
FIG. 6 is a perspective view of the shift device.
FIG. 7 is a rear view from the driver seat side of the detent mechanism.
FIG. 8 is an enlarged rear view of the shift device from the driver's seat side.
FIG. 9 is an enlarged plan view of the shift device.
FIG. 10 is an enlarged side view of the shift device.
FIG. 11 is an enlarged bottom view of the shift device.
FIG. 12 is a side view of manual release means.
FIG. 13 is a side view for explaining the movement of the manual release means.
FIG. 14 is a block diagram for explaining the operation of this embodiment.
FIG. 15 is a rear view from the driver's seat side of the shift device in which the manual release means is operated.
FIG. 16 is a rear view from the driver's seat side of the shift device in which the manual release means is operated in the second embodiment.
[Explanation of symbols]
2 Steering shaft 4 Steering column 6 Shift lever 8 Shift device 16 Device base 18 Column holding portion 20 Shift lever holding portion 34 Shift lever rotating shaft 38 Rotating base 68 Detent mechanism 78 Shift lock device 88 Solenoid 106 Cam rotating shaft 108 Shift lock cam 116 Shift lock arm 124 Manual release means 126 Lower column cover

Claims (1)

A device base that is attached to a steering column of a vehicle is provided, and a shift lever is attached to the device base so that the steering column can swing in the axial direction and rotate around the shaft, and a cam member that is rotated by a solenoid is provided. And when the solenoid is not energized, the cam member is rotated to a position to engage with the shift lever to restrict the operation of the shift lever, while the cam member is rotated manually to In a shift lock device for a column-type automatic transmission having a manual release means for allowing operation, the cam member is rotatably supported on a cam rotation shaft extending in parallel with a central axis of the steering column and the steering column When the cam member is viewed from the axial direction of the cam rotation shaft, the shift lever A shift lever engaging portion and a manual releasing means abutting portion that abuts on the manual releasing means are disposed at positions facing each other across a vertical line passing through the cam rotation shaft, and covers a lower portion of the steering column. A cylindrical recess projecting toward the manual release means contact portion is formed inside the lower column cover, and the release piece that contacts the manual release means contact portion and the opening of the recess are closed. A shift of a column type automatic transmission characterized in that a shaft-like release rod having a release button of a size is disposed in the recess as a manual release means so as to be movable in the axial direction via a return spring. Locking device.

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