JPH0440220B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is applied to an automatic transmission in which when the shift lever is returned to the parking position, the shift lever is automatically locked by operating the start key to the engine stop position. This invention relates to a shift lever interlock device.

[Prior Art] As is well known, automatic transmissions can be switched to the following positions (ranges): park, reverse, neutral, drive, 2nd gear, and 1st gear simply by tilting the shift lever back and forth in stages. In the drive position, the gear ratio is automatically adjusted depending on the speed, from a standstill to high-speed driving. In the above-mentioned automatic transmission, the operation of the shift lever is extremely simple and light, so when an outsider switches the shift lever from the parking position to the driving position when the car is parked on a slope, the brake is released and the car is turned off. There is a danger that it will start moving.

In the shift lever locking device disclosed in Japanese Patent Application Laid-Open No. 48-93044, unless the shift lever is returned to the parking position, the start key returns to the engine stop position and becomes inoperable. The handle is locked by an actuator that is interlocked with the handle, and the mechanism is extremely complicated and the manufacturing cost is high. Further, even if the steering wheel can be locked while the vehicle is parked, the shift lever can still be operated from the parking position to the driving position, so the above-mentioned danger cannot be completely eliminated.

In the shift lever lock device disclosed in Japanese Patent Publication No. 52-25613), when the start key is rotated from the engine stop position to the engine operating position, a first rod connected to the start key via a cable slides. However, the recess of the first rod coincides with the side hole of the case connected to the transmission. At this time, the second rod connected to the shift lever in the parking position via a cable can remove the ball that was engaged in the recess of the second rod through the side hole into the recess of the first rod. The shift lever can now be operated from the parking position to the desired driving position. When the shift lever is in the operating position, the ball is engaged in the recess of the first rod, so that the starting key cannot be returned to the engine stop position. Conversely, when the shift lever is returned to the park position, the start key can be returned to the engine stop position.

In the above-mentioned device, when the starting key is returned from the operating position to the engine stop position, it not only pulls back the second rod that is inserted into a hole in the transmission case that is far away, but also pulls the ball into the recess of the second rod. The problem is that the starting key has to be removed from the hole through the side hole into the recess of the first rod, which makes the operation of the starting key extremely heavy.

[Problems to be Solved by the Invention] In view of the above-mentioned problems, the purpose of the present invention is to reduce the burden of operating the start key, so that when parking the vehicle, the shift lever must be returned to the parking position to move the start key to the engine stop position. To provide a shift lever interlock device in which the shift lever is locked in the parking position when the start key is returned to the engine stop position.

[Means for Solving the Problem] In order to achieve the above object, the present invention has a structure in which a sliding plate interlockingly connected to a shift lever is slidably supported on a wall of a case of a cylinder lock, and a starting key is attached to a starting key. A locking rod supported by the wall of the case and removable from a hole in the sliding plate is biased and engaged by a spring with the camshaft that rotates together with the cylinder lock, and the locking rod is engaged with the camshaft that rotates together with the cylinder lock by a spring. The hole in the moving plate projects into the moving path of the lock rod, and the lock rod engages with the hole in the sliding plate when the start key is operated to the engine stop position.

[Operation] According to the present invention, the sliding plate interlockingly connected to the shift lever via the cable is slidably supported by the case of the cylinder lock integrated with the steering barrel. A lock rod, which is engaged with a camshaft integral with the cylinder lock, is also slidably supported in the case of the cylinder lock.

When the shift lever is returned from the driving position to the parking position, the hole in the sliding plate protrudes into the movement path of the lock rod. When the start key is returned from the operating position to the engine stop position, the locking rod is pushed by the camshaft and engages with the hole in the sliding plate, locking the shift lever in the parking position.

Since the starting key simply pushes the locking rod into the hole in the sliding plate via the camshaft, the operating burden of the starting key is very light.

[Embodiment of the Invention] As shown in FIG. 1, a substantially cylindrical case 6 extending laterally is integrally formed in the upper part of a steering tube 9 fixed to a vehicle body for guiding a steering shaft 2. A cylinder lock 14 operated by the start key 5 is housed at the right end of the case 6. A camshaft 55 that rotationally engages with the engagement piece 26 of the cylinder lock 14 is housed in the center of the case 6 . A starter switch 32, which is operated by a camshaft 55, is housed at the left end of the case 6. The camshaft 55 has an intermediate portion rotatably supported by the cylindrical portion 67 of the case 6, an end portion 34 supported by the intermediate wall 62 of the case 6, and is held by a retaining ring 63 to prevent it from coming off.

The handle lock mechanism is constructed as follows.
When the base 31 of the lock pin 31a is biased and engaged with the cam 71 of the camshaft 55 by the spring 65, and the lock pin 31a is projected into the groove 2a of the steering shaft 2, the steering shaft 2 to which the handle is connected cannot rotate. Spring 6
5 is a cover 6 that closes the opening in the middle part of the case 6;
4 and the base 31 of the lock pin 31a. When the camshaft 55 is rotated by the start key 5, the lock pin 31a is pushed back against the force of the spring 65 and removed from the groove 2a of the steering shaft 2. Such a configuration is similar to the conventional one.

In the present invention, a cam 57 is formed on a small-diameter shaft portion 61 formed on the right end side of the camshaft 55, and the cam 57 pushes the locking rod 52 supported on the case 6, so that the tip of the locking rod 52 is attached to the sliding plate 53a. Hole 53b (Figure 2)
It is designed so that it can be engaged with. The sliding plate 53a is formed integrally with the shaft 53, and is slidably supported by a cylindrical portion 76 formed on the outer wall of the steering tube 9 and substantially parallel to the steering shaft 2, and is used to shift the automatic transmission as described later. Move in conjunction with lever operation.

As shown in FIG. 2, the portion of the camshaft 55 that includes the cam 57 is made smaller in diameter than the portion that engages with the cylindrical portion 67. The lock rod 52 is slidably supported by a pair of upper and lower guide grooves 69 formed in an opening or a cavity 75 across the cylindrical portion 67 of the case 6, and is urged into engagement with the cam 57 by a spring 54. The tip of the locking rod 52 has a narrow width, and can be engaged with and removed from the rectangular hole 53b formed in the sliding plate 53a described above. The cavity 75 is closed by a cover 68.

One end of an inner cable 41 is connected to the sliding plate 53a, and the other end of the inner cable 41 is connected to a shift lever 38 of an automatic transmission, as shown in FIG.

The shift lever operating mechanism of an automatic transmission is constructed as follows. An operation box 36 is fixed to the floor of the vehicle body by a bracket 35. A shift lever 38 having a knob 39 is attached to the support shaft 4 along a groove 37 extending in the longitudinal direction of the vehicle body provided at the upper end of the operation box 36.
It can be tilted back and forth (in the direction of arrow x) around point 3, and can be switched to a desired operating position. Sliding plate 5
3a, an inner cable 41 is coupled to a locking portion 44 of the shift lever 38. The inner cable 41 is inserted and supported by the outer tube 40, and both ends of the outer tube 40 are fixed to the bracket 35 and the steering tube 9.

In the above embodiment, instead of using the inner cable 41, the shift lever 38 and the sliding plate 53a may be interlocked and connected by a rod or a link mechanism.

Next, the operation of the device of the present invention will be explained. When the start key 5 is rotated from the engine stop position to the operating position, the lock pin 31a is moved by the cam 71 to the steering shaft 2.
is pulled out from the groove 2a. At the same time, the lock rod 52, which had been pressed by the cam 57, is removed from the hole 53b by the force of the spring 54. When the shift lever 38 is tilted from the parking position shown by the chain line in FIG. 3 to the operating position shown by the solid line, the sliding plate 53a is pulled by the inner cable 41, and the hole 53b is withdrawn from the movement path of the lock rod 52. Therefore, the start key 5 cannot be returned to the engine stop position while the vehicle is running. This is because even if the lock rod 52 is pushed by the cam 57, the lock rod 52 hits the plate surface of the sliding plate 53a and cannot engage with the hole 53b.

When the shift lever 38 is returned to the parking position, the sliding plate 53a is pushed back to the position shown in FIG. 2 by the inner cable 41. Here, when the start key 5 is rotated to the engine stop position, the lock rod 52 is pushed by the cam 57 of the camshaft 55 against the force of the spring 54, and is engaged with the hole 53b of the sliding plate 53a. .

When the start key 5 is returned to the engine stop position, the shift lever 38 is locked in the parking position and cannot be operated to the operating position.

[Effects of the Invention] As described above, in the present invention, the sliding plate interlocked with the shift lever is slidably supported on the wall of the case of the cylinder lock, and is rotated together with the cylinder lock by the start key. A locking rod supported by the wall of the case and removable through a hole in a sliding plate is biased and engaged with the camshaft by a spring, and when the shift lever is in the parking position, the hole in the sliding plate locks the locking rod. Since it protrudes into the path, when parking, the start key cannot be returned to the engine stop position unless the shift lever is returned to the park position, and when the start key is returned to the engine stop position,
The shift lever is locked in the park position. Therefore, manipulation by outsiders and theft can be prevented.

Since the starting key cannot be returned to the engine stop position while the vehicle is running, there is no risk of the steering wheel becoming locked.

According to the present invention, the lock bar that is linked to the start key is disposed near the cylinder lock, and when the start key is operated, the lock bar is driven by a cam and engages and disengages from the hole in the sliding plate that is linked to the shift lever. Since there is no long cable between the cylinder lock and the lock rod that would cause operational resistance, the operating burden on the starting key is extremely light.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of a shift lever interlock device according to the present invention, and FIG. 2 is a cross-sectional view taken along the line of FIG.
FIG. 3 is a side view showing the mounting structure of the shift lever. 5... Start key, 6... Case, 9... Steering tube, 14... Cylinder lock, 38... Shift lever, 41... Inner cable, 52... Lock bar, 53a... Sliding plate, 53b... ...hole, 54...
Spring, 55...camshaft.

Claims (1)

[Claims] 1. A sliding plate connected to the shift lever is slidably supported on the wall of the case of the cylinder lock, and a camshaft that is rotated together with the cylinder lock by the start key is supported on the wall of the case. In addition, a removable locking rod is biased and engaged with the hole in the sliding plate by a spring, and when the shift lever is in the parking position, the hole in the sliding plate protrudes into the movement path of the locking rod, and the start key is moved to the engine stop position. A shift lever interlock device characterized in that a lock rod engages with a hole in a sliding plate when operated.