JP3921263B2 - Shift lock device for automatic transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shift lock device for an automatic transmission that locks a shift lever at a parking position during parking.
[0002]
[Prior art]
Conventionally, a mechanism for locking a shift lever at a parking position during parking has been proposed as a shift lock device for an automatic transmission.
[0003]
For example, the shift lock device of an automatic transmission disclosed in Japanese Patent Publication No. 3-53135 is slidable on a wall of a steering cylinder on a cam adjacent to a cam of a lock mechanism rotated by a start key. The supported lock pin is biased and engaged by a spring, and a sliding plate having a pin hole that can be engaged with and disengaged from the lock pin is slidably supported on the wall of the steering cylinder, and the control pin of the shift lever is set to the parking position. Adjacent to the opening edge of the guide plate to be engaged, an interlock cam that can be rotated to a position where the control pin is restrained to the opening edge and a position where the control pin is released from the opening edge is axially supported on the guide plate and slid A moving plate and a bell crank are connected by a remote control member.
[0004]
[Problems to be solved by the invention]
However, in the above conventional locking device, since the interlock cam is only supported by the guide plate, the load applied to the interlock cam when, for example, the push button at the upper end of the shift lever is pressed strongly is applied. The guide plate is directly applied to the guide plate via the support shaft pin that supports the interlock cam, and a large load may be applied to the guide plate. For example, the thickness of the guide plate is increased. There was a problem that the strength of the steel had to be increased.
[0005]
Further, since the interlock cam is directly supported by the guide plate, there is a problem that the place where the interlock cam is laid out is limited, and the degree of freedom in layout is small.
[0006]
An object of the present invention is to solve the above-mentioned problems, increase the degree of freedom of the layout of the interlock cam, and provide an automatic transmission capable of withstanding such a heavy load without increasing the strength of the guide plate. A shift lock device is provided.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a shift lock device for an automatic transmission according to the present invention is a shift lock device for an automatic transmission that locks a shift lever in a parking position. One end of the support pin is fixed to the support pin, and an interlock cam is rotatably supported on the support pin. The other end of the support pin is connected to at least the other end of the support pin formed in the guide plate. By inserting the support hole having a larger diameter than the outer diameter with a gap, the normal load input from the support pin is supported only by the bracket support wall, and when a large load is input, the end of the support pin is Since it abuts on the support hole of the guide plate and is supported by both the bracket support wall and the guide plate, a structure capable of withstanding a heavy load is obtained without increasing the strength of the guide plate. It is possible, it is possible to increase the degree of freedom of the layout of the interlocking cam.
[0008]
In addition, a small-diameter portion is formed at the other end of the support pin , and the small-diameter portion is inserted into a large-diameter support hole drilled in the guide plate, thereby inputting from the support pin as described above. When the load is supported also on the guide plate side, the step of the small diameter portion is locked in the support hole, and the axial position of the support pin relative to the guide plate can be regulated with a simple structure.
[0009]
Further, a bracket is formed separately from the base plate, and the bracket includes a flat portion in contact with the upper surface of the base plate, a fixing bolt hole drilled in the flat portion, and an extension formed continuously at one end of the flat portion. And a bracket support wall portion standing on the extension portion and having a support hole and a cable support portion provided continuously at the other end of the flat portion, thereby facilitating the manufacturing process. At the same time, sufficient strength can be easily secured to the bracket support wall.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Examples will be described with reference to examples of the present invention.
[0011]
2 and 3, the shift lever 1 of the automatic transmission has a knob 2 at the upper end, and the knob 2 is slidably fitted into a hole drilled in the lateral direction. The cam surface at the upper end of the slider 4 slidably fitted on the upper end of the hole extending in the longitudinal direction in the shift lever 1 is in contact with the cam surface formed at the inner end.
[0012]
The upper end of the slider 4 is connected to the lower end of the slider 4 so that the rod 5 is vertically movable downward. The lower end of the rod 5 is engaged with the control pin 6. The control pin 6 is moved upward by a spring 7 from below. It is energized towards.
[0013]
Further, the control pin 6 is provided orthogonal to the axis in the shift lever 1, and both ends protrude from a long hole 81 of the guide block 8 provided in the lower part of the shift lever 1 so as to be movable in the vertical direction.
[0014]
The lower end of the shift lever 1 is connected to a bearing sleeve 91 that is rotatably fitted to the support shaft 9, and both ends of the support shaft 9 are fixed to a base plate 10 fixed to the vehicle body.
[0015]
A guide plate 12 is fixed to the base plate 10 with bolts 14, and one end of the control pin 6 protruding from the long hole 81 of the guide block 8 is engaged with a guide opening 121 formed in the guide plate 12. The opening 121 includes a parking position P that is deeply cut, a reverse position R that continues in a staircase shape, a drive position D, a second speed position II, and a first speed position L.
[0016]
The bracket 11 is fixed to the upper surface of the base plate 10 with bolts 13, and as shown in FIG. 1, the support pin 15 formed with a small diameter in the support hole 115 formed in the bracket support wall portion 114 provided in the bracket 11. One end 154 is inserted and fixed, and a spring 16 is wound on the bracket 11 side at the center portion 153 of the support pin 15 formed in a large diameter, and the interlock cam 17 is rotatably fitted on the opposite side. 3 and 4, the other end 151 of the support pin 15 formed with a small diameter is placed near the parking position P of the guide opening 121 of the guide plate 12. It is loosely fitted in the drilled engagement hole 122 with a predetermined gap.
[0017]
As shown in FIG. 8, both ends 151, 154 are formed with a small diameter, and the center portion 153 is formed with a large diameter. Is formed.
[0018]
The support pin 15 may have the same diameter over the entire length without forming the small diameter portion and the large diameter portion, or may form the small diameter portion only at one end.
[0019]
As shown in FIG. 5, the interlock cam 17 is provided with a support hole 171 through which the support shaft pin 15 penetrates, and a locking pin 172 projects from the upper end on the bracket 11 side. A locking groove 173 that opens to the outside is provided at an outer edge position substantially orthogonal to the straight line connecting the support hole 171, and the control pin 6 enters and exits the locking groove 173.
[0020]
One end of the lock cable 18 is coupled to the locking pin 172, and the other end of the lock cable 18 is connected to a brake, a key switch (both not shown), etc., and performs a brake operation (for example, depressing a brake pedal). ), The lock cable 18 is loosened by an operation such as turning on the key switch, and the interlock cam 17 can be rotated clockwise in FIGS. 3 and 4 (from the B position to the A position in FIG. 4). .
[0021]
Conversely, if the brake operation is not performed, the interlock cam 17 is held at the position B in FIG. 4 with the lock cable 18 being pulled.
[0022]
As shown in FIGS. 6 and 7, the bracket 11 has a flat portion 111 in contact with the upper surface of the base plate 10, a fixing bolt hole 112 formed in the flat portion 111, and one end of the flat portion 111 being substantially horizontal. An extension portion 113 extended in the direction, a bracket support wall portion 114 erected substantially vertically on one side of the extension portion 113, a support hole 115 formed in the bracket support wall portion 114, and a flat portion 111. A support portion 116 formed by extending the other end, and a support groove 117 formed at an end portion of the support portion 116 and opened outwardly and through which the cable 18 is inserted and supported.
[0023]
In this embodiment, the bracket 11 is formed separately from the base plate 10, but may be formed integrally with the base plate 10.
[0024]
The operation will be described. When the brake operation or the like is not performed, the interlock cam 17 is held at the position B in FIG. 4. At this time, the locking groove 173 faces obliquely upward and the control pin 6 is at the parking position P. Is retained.
[0025]
When the interlock cam 17 can be rotated from the B position to the A position in FIG. 4 by operating the brake or the like, the push button 3 of the shift lever 1 can be pushed to lower the rod 5 and the control pin 6 is lowered. When the control pin 6 is lowered, the interlock cam 17 is rotated from the B position to the A position in FIG. 4 and stopped against the spring 16, and the locking groove 173 is substantially horizontal and below the guide opening 121. Therefore, the control pin 6 comes out of the locking groove 173 and can move in the guide opening 121. By moving the shift lever 1, the control pin 6 comes out of the locking groove 173 and moves to the reverse position R. Move to position D or the like to shift to the travel range.
[0026]
When the control pin 6 is moved from the travel range such as the drive position D to the parking position P, the interlock cam 17 is stopped at A in FIG. 4, so that the drive position D passes through the reverse position R to the parking position P. When moving, when the push button 3 of the shift lever 1 is pushed to lower the rod 5 and the shift lever 1 is moved, the locking groove 173 of the interlock cam 17 opens substantially horizontally and below the guide opening 121. Therefore, when the control pin 6 fits smoothly into the locking groove 173 and the pressing of the push button 3 of the shift lever 1 is released, the control pin 6 rises and the interlock cam 17 is moved from A to B in FIG. While rotating, it reaches the parking position P.
[0027]
As described above, a bracket is formed separately from the base plate, and a bracket support wall portion is erected on the bracket, and one end of the support pin is fixed to the bracket support wall portion, or the bracket is integrated with the base plate. A bracket support wall is formed to form a portion, one end of a support pin is fixed to the bracket support wall, and an interlock cam is rotatably supported on the support pin. The other end is drilled in the guide plate and is usually input from the support pin by inserting it into a large-diameter engagement hole formed at a larger diameter than the outer diameter of at least the other end of the support pin. The load is supported only by the bracket support wall, and when a large load is input as described above, the end of the support pin abuts the engagement hole of the guide plate, and both the bracket support wall and the guide plate Support with Et al., Without increasing the strength by a means such as increasing the thickness of the guide plate, it is possible to obtain a structure that can withstand the large load, it is possible to increase the degree of freedom of the layout of the interlocking cam.
[0028]
Further, a small diameter portion is formed at the other end of the support pin , the small diameter portion is formed in the guide plate, and at least in a large diameter engagement hole formed with a larger diameter than the small diameter portion of the support pin. As described above, when the load input from the support shaft is supported also on the guide plate side, the step of the small diameter portion is locked in the support hole, and the support pin is fixed to the guide plate. Position control in the axial direction can be performed with a simple structure.
[0029]
Further, a bracket is formed separately from the base plate, and the bracket includes a flat portion in contact with the upper surface of the base plate, a fixing bolt hole drilled in the flat portion, and an extension formed continuously at one end of the flat portion. And a bracket support wall portion standing on the extension portion and having an engagement hole and a cable support portion provided continuously at the other end of the flat portion, thereby facilitating the manufacturing process. In addition, sufficient strength can be easily ensured in the bracket support wall.
[0030]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect as described below.
[0031]
One end of the support pin is fixed to a bracket support wall portion that is integrated with the base plate or stands separately, and the interlock cam is rotatably supported by the support pin, and the other end of the support pin is guided by By inserting the engagement hole with a gap larger than the outer diameter of at least the other end of the support pin drilled in the plate, the normal load input from the support pin is supported only by the bracket support wall. When a large load is input, the end of the support pin comes into contact with the engagement hole of the guide plate and is supported by both the bracket support wall and the guide plate, without increasing the strength of the guide plate. A structure capable of withstanding a large load can be obtained, and the degree of freedom in the layout of the interlock cam can be increased.
[0032]
In addition, a small-diameter portion is formed at the other end of the support pin , and the small-diameter portion is inserted into the large-diameter engagement hole formed in the guide plate, so that the input from the support pin is performed as described above. When the load to be supported is also supported on the guide plate side, the step of the small diameter portion is locked in the support hole, and the axial position of the support pin relative to the guide plate can be regulated with a simple structure.
[0033]
Further, a bracket is formed separately from the base plate, and the bracket includes a flat portion in contact with the upper surface of the base plate, a fixing bolt hole drilled in the flat portion, and an extension formed continuously at one end of the flat portion. And a bracket support wall portion standing on the extension portion and having an engagement hole and a cable support portion provided continuously at the other end of the flat portion, thereby facilitating the manufacturing process. In addition, sufficient strength can be easily ensured in the bracket support wall.
[Brief description of the drawings]
FIG. 1 is an assembly view showing an interlock cam mounting structure of the present invention.
FIG. 2 is a front sectional view showing a shift lever mounting structure of the present invention.
FIG. 3 is a side view showing the shift lever mounting structure of the present invention.
FIG. 4 is an operation explanatory view of the locking mechanism of the present invention.
FIG. 5 is a side view of the interlock cam of the present invention.
FIG. 6 is a front view of the bracket of the present invention.
FIG. 7 is a plan view of the bracket of the present invention.
FIG. 8 is a front view of the support pin of the present invention.
[Explanation of symbols]
1 Shift lever, 3 Push button, 5 Rod, 6 Control pin 8 Guide block, 10 Base plate, 11 Bracket 114 Bracket support wall, 12 Guide plate, 15 Support pin 16 Spring, 17 Interlock cam

Claims (3)

In a shift lock device of an automatic transmission that locks a shift lever in a parking position, one end of a support pin is fixed to a bracket support wall that is integrally or separately provided on a base plate, and an interlock cam is attached to the support pin. By supporting the pivot pin in a freely rotatable manner and inserting the other end of the pivot pin into a support hole having a larger diameter than the outer diameter of at least the other end of the pivot pin formed in the guide plate, a large load is applied. A shift lock device for an automatic transmission, wherein the shift pin device of the automatic transmission receives the other end of the support shaft pin engaged with a support hole of a guide plate when acted. 2. A shift lock device for an automatic transmission according to claim 1, wherein a small-diameter portion is formed at the other end of the support pin , and the small-diameter portion is inserted into a large-diameter support hole formed in the guide plate. .   A bracket is formed separately from the base plate, and the bracket includes a flat portion in contact with the upper surface of the base plate, a fixing bolt hole drilled in the flat portion, and an extension formed continuously at one end of the flat portion, 3. A bracket support wall portion standing on the extension portion and having a support hole formed therein, and a cable support portion provided continuously at the other end of the flat portion. Automatic transmission shift lock device.

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