JPH04171359A - Transmission operating device - Google Patents

Abstract

PURPOSE:To shorten the total length of an actuator by a simple structure by installing a stroke sensor between the recessed part formed at one edge part of the operating rod of the actuator and the projecting part on an actuator housing side. CONSTITUTION:On the edge surface of the sliding piston 33 of an actuator 7 for shift, a recessed part 33a which extends along the sliding direction is installed. In the recessed part 33a, a projection part 31a which is formed integrally is accommodation-arranged in insertion-fitted state on the edge wall of a housing 31 positioned on the actuator 7 side, and a stroke sensor 36 is arranged between the inner peripheral surface of the recessed part 33a and the outer peripheral surface of the projection part 31a. Accordingly, the total length of the actuator can be shortened, and the dimension of the device can be reduced, and this installation space for the conventional stroke sensor can be effectively utilized for other devices.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a transmission operating device equipped with an actuator that is driven based on a change lever operation signal.

b. Prior art In transmission operating devices and electronically controlled automatic transmissions that remotely control the transmission of automobiles using actuators, etc., stroke sensors are used to check the gear position of the transmission and to control the actuators, etc. is located.

FIG. 3 shows a conventional transmission operating device,
Two so-called contact type stroke sensors 71, 72 are used in this device. One stroke sensor 71 is arranged near the end of the select rod 74 of the select actuator 73, and the other stroke sensor 7
2 is disposed near the end of the shift rod 76 of the shift actuator 75. Each stroke sensor 71,72 has three limit switches 71a.

72a, and when the selectron door 4 or shift rod 76 moves to a predetermined position by operating the change lever 77, one of the limit switches 71a, 72a is pressed by the flange-shaped ends 74a, 76a of the rod 74.76. is turned ON, and this signal is sent to the controller 78.
is input to detect the gear position of the transmission 79. In Fig. 3, 80 is an air tank;
1 to 84 are electromagnetic valves, 85 is an indicator lamp, and 86 is an abnormality alarm.

Further, FIG. 4 shows another conventional transmission operating device, in which a so-called non-contact type stroke sensor 92 is used. This stroke sensor 9
2 is a rod 94 attached to the end of the shift select shaft 93, a magnet 95 provided on the outer peripheral surface of this rod 94, and a shaft cover 96 surrounding the opening 7 door 94;
A magnetic sensor 97 arranged on the inner peripheral surface of this shaft cover 96
It is made up of.

When the change lever is operated, the shift/select shaft 93 slides or rotates to perform a gear shift or select operation of the transmission 91. At this time, the sliding or rotating position of the shift/select shaft 93 is detected by the magnetic sensor 9.
7, and this detection signal is transmitted to an output terminal 99 through an amplifier circuit 98.

C9 Problem to be Solved by the Invention However, the above-mentioned conventional contact type stroke sensor 71
．． 72 and the non-contact type stroke sensor 92 are both provided with a shaft cover portion 73b protruding from one end of the actuator housing 73a, 75a or the side surface of the transmission 91.

75b, G is set in 96 [:ly h”
74, 76, 9. l [”Since it is arranged on an extension line, a relatively large installation space is required in the axial direction,
As a result, the overall length of the actuators 73, 75, etc. becomes considerably long, resulting in an increase in the size of the transmission operating device.

The present invention has been made in view of the above circumstances, and its purpose is to provide a transmission operating device that eliminates the above-mentioned drawbacks, has an extremely simple structure, and has a shortened overall length of the actuator. .

d. Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides a sliding piston at one end of the operating rod of the actuator that is driven based on the operating signal of the change lever. At the same time, a recess extending along the sliding direction is provided on the end face of the sliding piston, and a protrusion on the actuator housing side is inserted into the recess and arranged to accommodate the inner circumferential surface of the recess and the outer circumference of the protrusion. A stroke sensor is installed on the surface.

e. Function In the transmission operating device according to the present invention, the stroke sensor is installed using the recess provided in the sliding piston of the actuator and the protrusion of the housing accommodated in this recess. The overall length of the actuator can be shortened by the portion where the concave portion and the convex portion overlap, and the installation space for the stroke sensor, which is required in conventional devices, can be used for other devices.

f. Examples The present invention will now be described in detail based on illustrated examples.

1 and 2 show a complete embodiment of a transmission operating device according to the present invention.

This operating device includes a shift and select mechanism section 10 placed on the top surface of the transmission 1, and a shift mechanism extending in a direction perpendicular to the longitudinal direction of the mechanism section and disposed on the side of the transmission 1. 30.

FIG. 1 mainly shows the shift and select mechanism section 1O. /S housing 11 of this mechanism section 10
has four parts 11a, ], 1b, lie, lld
It consists of 11 parts of which
A shift and select operation rod 12 is supported so as to be slidable and rotatable along its axial direction. The operating rod 12 is provided with a shift and select mechanism section 13 at its intermediate portion, and this lever 13 is fixed to the operating rod 12 with a bolt 14 or the like. The free part 13a of this lever 13 is the notch 2a of the four shift forks 2.3.4.5.

3a, 4a, and 5a.

Further, the operating rod 12 includes a sliding piston 15 at one end, and an outer lever 16 that cooperates with the shift mechanism section 30 at the other end. And sliding piston 1
5 is positioned and fixed to the operating rod 12 with a snap ring or the like, and the outer lever 16 is fixed to the operating rod 12 with a pin or the like. The sliding piston 15 is housed in a cylinder in the part 11b of the housing 11, which defines two pressure chambers 17, 18. These pressure chambers 17, 18 and sliding piston 15 constitute a selection actuator 6 that is driven based on an operation signal of a change lever (not shown).

Further, both ends of the operating rod 12 are connected to the housing portion 11a.
, protrudes outward from llb, and their ends are
The housing part is covered by the lid. Free pistons 19 and 20 are housed in these housing portions 11c and lid, respectively. Each free piston 19,20 is connected to the end face 12 of the operating rod 12.
The surfaces facing a and 12b are stopper surfaces 19a and 20
a, and the opposite surface forms a housing portion 11c,
Pressure chambers 21 and 22 are defined within the cylinders of the lids, respectively.

Shift and select mechanism section 10 configured in this way
Each pressure chamber 17,18 of '! ! Magnetic disconnection detection switching valve 5152
Each of the pressure chambers 21 and 22 is connected to the air tank 53 via one electromagnetic switching valve 54.

The state of the shift and select mechanism section 10 shown in FIG. 1 is a state in which the switching valves 51, 54 are opened and the switching valve 52 is closed. Therefore, in this state, compressed air is supplied to the pressure chambers 17, 21, 22, and the pressure chamber 18 is open to the atmosphere. Then, the sliding piston 15 is biased to the right in FIG.
2 to the right. - side, the free piston 19 is biased to the left and the partition wall of the housing portion 11b
is pressed against. Furthermore, the free piston 20 is urged to the right and is pressed against the partition wall 11f of the housing portion lid. Therefore, the end surface 12a of the operating rod 12 abuts against the stopper surface 19a of the free piston 19, and is positioned there. In this state, the shift and select lever 13 is engaged with the notch 3a of the shift fork 3 (this state is defined as the second neutral position N2).

From this state, in order to engage the lever 13 with the notch 4a of the shift fork 4 (the third neutral position N), the switching valve 54 is kept open and the switching valve 52 is opened. Then, the switching valve 51 may be closed.

Then, the sliding piston 15 is biased to the left in FIG. It collides with and is positioned there. - Furthermore, in order to engage the lever 13 with the notch 5a of the shift fork 5 (the fourth position is in the neutral position N), the switching valves 51 and 52 are kept open and the switching valve 54 is opened. Just close the valve. Then, since the pressure chamber 22 is opened to the atmosphere, the sliding piston 1
With the pressure in the pressure chamber 18 acting on 5, the operating rod 12
It moves to the left together with the free piston 20. This leftward movement of the operating rod 12 is stopped when the free piston 20 hits the cylinder end wall 11g of the housing part lid. This position is the fourth neutral position N4.

In addition, in order to engage the lever 13 with the notch 2a of the shift fork 2 from this state (the first position is the neutral position N), the switching valve 54 is maintained in the closed state, and the switching valve 51 is closed. It is sufficient to open the valve and close the switching valve 52. Then, the pressure chamber 18 is opened to the atmosphere, and the pressure chamber 1
7 is supplied with compressed air, the sliding piston 15 is urged to the right in FIG. 1, and the operating rod 12 is moved to the right. This operating rod 12 is the free piston 1
9, the piston 19 moves to the right along with the housing part 1.
It is stopped at abutment -1 against the end wall 11h of 1c.

FIG. 2 shows the shift mechanism section 30.

A shift operation rod 32 is supported in the housing 31 of the mechanism section 30 so as to be slidable in the axial direction thereof. The operating rod 32 has a sliding piston 33 provided at one end thereof.
The sliding piston 33 is provided with a housing 31
The cylinder is defined into two pressure chambers 34,35.

These pressure chambers 34, 35 and the sliding histone 33 constitute a shift actuator 7 that is driven based on an operation signal from a change lever (not shown).

Actually, a recess 33a extending along the sliding direction is provided on the end surface of the sliding piston 33.
Inside a is a housing 31 located on the side of the actuator 7.
The convex portion 31a integrally formed on the end wall of the unit can be stored in an inserted state! has been done. Therefore, the convex portion 31a is the concave portion 33a.
Correspondingly, it protrudes into the housing 3I along the axial direction of the operating rod 32, and its outer diameter is formed to be slightly smaller than the inner diameter of the recess 33a, and the protrusion length is also smaller than that of the recess 3.
It is formed to be shorter than the depth of 3a. A stroke sensor 36 is disposed between the inner circumferential surface of the recess 33a and the outer circumferential surface of the convex portion 31a, and the stroke position of the operating rod 32 is detected by the sensor.

The stroke sensor 3G includes one permanent magnet 60 and three Hall elements 61, 62, which are magnetoelectric conversion elements.
63, and the magnet 60 is located in the recess 33a.
It is buried in the inner circumferential surface of the container with a portion thereof exposed to the outside. Further, the Hall element 6L 62.63 is connected to the magnet 6
0, they are disposed in the axial direction at predetermined intervals on the outer circumferential surface of the convex portion 31a, and are connected to an external controller via lead wires and an amplification unit 7 (not shown), respectively. Therefore, these Hall elements 61, 62, 63 generate an electromotive force due to the magnetism of the magnet 60, and the sliding screw l
When the electromotive force generated by the -9 lever due to the sliding of the pin 33 exceeds a certain set voltage, it is detected that the magnet 60 is in the opposing position. 32 stroke positions can be detected.

That is, the stroke sensor 36 detects three shift positions, and for example, the Hall element 61 detects that the magnet 60 is in the bank R.
1. The Hall element 62 detects that the magnet 6 is in any position corresponding to the second speed, the fifth speed, and the seventh speed.
0 is the neutral position N1. Nz.

The Hall element 63 detects that the magnet 60 is in the first speed,
This detects that the vehicle is in any position corresponding to third, fourth, or sixth speed. Note that the Hall element 6
L 63 may be arranged to detect positions opposite to each other.

On the other hand, this operating rod 32 is provided with an outlet lever 37 at its intermediate portion. This output lever 37 has a hole 37a that fits into the operating rod 32.
After the operating port 7 is inserted through the opening 32, it is fixed to the operating rod 32 with a pin 38.

Further, a damper 39 is installed in the housing 31. This damper 39 is disposed on the opposite side of the operating rod 32 from the direction in which the protruding portion 37b of the output lever 37 protrudes. This damper 39 has two damper chambers 41 , 42 defined by pistons 40 . The piston 40 has a rod 43 extending on one side, and an end of the rod 43 engages with a damper lever 44 .

Output lever 3 of the shift mechanism section 30 configured in this way
As shown in FIGS. 1 and 2, the protrusion 37b of 7 is connected to the outer lever 16 of the shift and select mechanism section 10.
is engaged with. Further, each of the pressure chambers 34 and 35 is connected to an air tank 53 via an electromagnetic switching valve 55, 56, respectively.

In the state shown in FIG. 2 of the shift mechanism section 30, the switching valve 55 is
．． Both valves 56 are opened, and compressed air is supplied into the pressure chambers 34 and 35. And the sliding piston 33
remains in an intermediate position.

In this state, when the switching valve 56 is closed, the compressed air in the pressure chamber 35 is discharged to the atmosphere, and the sliding piston 33 is urged to the right in FIG. 2. Therefore, since the operating rod 32 is moved to the right, the output lever 37 is also moved to the right. This rightward movement of the output /\-37 is transmitted to the outer lever 16, and the lever 16 is rotated in one direction about the axis of the operating rod 12. Therefore, the operating rod 12 is also rotated, causing the shift and select lever 13 to be rotated toward this side in FIG. This lever 13 moves the shift fork 3 toward the front, and moves the fork shaft 3b of the shift fork 3 toward the front. In addition, in FIG. 1, symbols 2b, 4b, 5
b represents each shift fork 2.4. 5 fork shaft.

Completion of the shift operation is confirmed by the stroke sensor 36 because the magnet 60 moves to a position facing the Hall element 63.

To return the shift fork 3 to the neutral position N2 from this state, the switching valve 55 is closed and the switching valve 56 is opened. Then, compressed air is supplied to the pressure chamber 35, urging the sliding piston 33 to the left in FIG. Therefore, the operating rod 32 is moved to the left, and the outer lever 16 is rotated via the output lever 37 in the opposite direction to the above operation. This movement of the outer lever 16 operates the shift and select lever 13 via the operating rod 12, and moves the shift fork 3 toward the neutral position N2. When the shift fork 3 reaches the neutral position N2, the magnet 60 moves to a position facing the Hall element 62, so that position is confirmed by the stalk sensor 36, and this detection signal is sent to a controller (not shown). The switching valve 55 is opened by a command from the controller. Therefore, compressed air is supplied into the pressure chamber 34, and the operating rod 32 is stopped there. That is,
The shift fork 3 is stopped at the neutral position N2.

Moreover, when the switching valve 55 is closed from this state, the pressure chamber 3
4 is exhausted to the atmosphere, and the sliding piston 33 is urged to the left in FIG. Therefore, the operating rod 32 is moved to the left, and the output lever 37 is moved to the left. This leftward movement of the output lever 37 is transmitted to the outer lever 16, which is rotated in the other direction around the fine center of the operating rod 12. Therefore, the operating rod 12 is also rotated, and the shift and select lever 13
is rotated toward the back in Fig. 1. This lever 13
moves the shift fork 3 toward the rear, and moves the fork shaft 3b toward the rear.

Completion of the shift operation is confirmed by the stroke sensor 36 because the magnet 60 moves to a position facing the Hall element 61.

In order to return the shift fork 3 to the neutral position N2 again from this state, the switching valve 56 is closed and the switching valve 56 is closed.
Open the valve 5. Then, compressed air is supplied to the pressure chamber 34, urging the sliding piston 33 to the right in FIG. Therefore, the operating rod '32 is moved to the right, and the outer lever 16 is rotated via the output lever 37 in the opposite direction to the above operation. This movement of the outer lever 16 operates the shift and select lever 13 via the operating rod 12, and moves the shift fork 3 toward the neutral position N2.

When the shift fork 3 reaches the neutral position N2,
Since the magnet 60 moves to a position facing the Hall element 62, the position is confirmed by the stroke sensor 36, and the switching valve 56 is thereby opened.

Therefore, compressed air is supplied into the pressure chamber 35, and the operating rod 32 is stopped there. That is, the shift fork 3 is stopped at the neutral position N2.

A desired shift position can be obtained by performing similar operations thereafter.

In the operating device of this embodiment, a magnet 60 is embedded in the inner circumferential surface of a recess 33a provided in the sliding piston 33, and a Hall element is disposed in the outer circumferential surface of a convex portion 31a formed in the end wall of the housing 31. 61, 62, and 63 constitute the stroke sensor 36, and the convex portion 31 is located within the concave portion 33a.
Since the stroke sensor 36 is inserted and fitted, compared to the case where the stroke sensor 36 is provided between the outer circumferential surface of the operating rod 32 and the inner circumferential surface of the housing 31 located at the tip of the operating rod 32, the stroke sensor 36 is The axial space required for installation is small, and the overall length of the shift actuator tough can be shortened.

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

For example, in the embodiment described above, the stroke sensor 36 is provided in the shift actuator tough, but a similarly configured stroke sensor may also be provided in the select actuator 6. Further, in the above embodiment, a non-contact type stroke sensor 36 is used, but a contact type variable resistance type stroke sensor or the like may be used to achieve the same effect. In this case, it is necessary to provide a brush on the recess 33a side of the sliding piston 33 and a resistor on the protrusion 31a side of the housing 31 so that the brush slides on the resistor.

g. Effects of the Invention As described above, the transmission operating device according to the present invention includes a sliding piston at one end of the operating rod of the actuator, and four parts extending along the sliding direction on the end surface of the sliding piston. The convex part on the actuator housing side is inserted into this concave part, and the stroke sensor is provided on the inner circumferential surface of the concave part and the outer circumferential surface of the convex part, so that the operating rod can be extended as in conventional devices. The total length of the actuator can be shortened compared to the case where the stroke sensor is provided on a line, and the device can be made more compact, allowing the conventional stroke sensor installation space to be effectively utilized for other devices. Moreover, the actuator has a simple structure and does not require any new members, so the cost of the device does not increase and it is economically advantageous.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a transmission operating device according to the present invention, in which FIG. 1 is a longitudinal cross-sectional view of a shift and select mechanism section, and FIG. 2 is a longitudinal cross-sectional view of a shift mechanism section. 3 is a schematic configuration diagram showing a conventional transmission operating device and a stroke sensor, and FIG. 4 is a longitudinal sectional view showing a non-contact type stroke sensor. 6... Select actuator, 7... Shift actuator, 10... Shift ant select mechanism section, 30... Shift mechanism section, 31... Housing, 31a... Convex portion, 32. ...Shift operation lot, 33...
- Sliding piston, 33a... recess, 36... stroke sensor.

Claims (1)

[Claims] A sliding piston is provided at one end of the operating rod of the actuator that is driven based on the operating signal of the change lever, and a recess extending along the sliding direction is provided on the end surface of the sliding piston, and the actuator housing is placed in the recess. A transmission operating device characterized in that a side convex portion is housed in an inserted state, and a stroke sensor is provided on an inner circumferential surface of the concave portion and an outer circumferential surface of the convex portion.