JPH033094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a speed change operation mechanism for selecting and shifting a plurality of shift forks used for changing the speed ratio of an automobile, etc. The present invention relates to a gear shift operation mechanism equipped with a select position detecting device.

(Conventional example) Conventionally, this type of shift operation mechanism has a plurality of mechanisms in which a shift fork is mounted so as to be movable in the axial direction of a shift rod, and a select member that can move in a direction perpendicular to the shift rod is specified. By moving the shift fork in the axial direction while fitted with the shift fork, a specific shift fork can be selected and shifted,
Detection of the shift position consisted of a mechanical switch that turned on and off at the specific position to which the shift fork was moved.

(Problem to be Solved by the Invention) However, it is desired that such a speed change operation mechanism be made smaller, and electronic control has come to be performed. There is a need for a gear shift operation mechanism that can accurately detect the

(Means for Solving the Problem) The present invention was made in view of the above problem, and when the select rod is moved to a plurality of select positions set at constant select intervals, one end of the select rod is In a gear shift operation mechanism that performs a select operation by engaging with a shift fork, a plurality of Hall sensors equal to the select position are used as select position detection elements, all of which are equal in number.However, if the total number of Hall sensors is an odd number, there are many Virtually set a set of arbitrary integers N that have only one Hall sensor different from each other, and set the interval between adjacent Hall sensors as an integer interval N.
One magnet is provided on the select rod for each virtual set group, and a selection operation is performed at each select interval to connect one of the set of Hall sensors and a magnet corresponding to the set. When the magnets face each other, the magnets provided facing each other in the other set are located at predetermined positions where the select interval is equally divided by an integer N between the Hall sensors, so that they do not face any of the Hall sensors. The technical point is that the

For example, if four selection positions are set at each selection interval l, the Hall sensors are virtually set into two sets of two (N = 2), and the arrangement interval of each Hall sensor is set to 2·l. When one set of Hall sensors corresponds to the magnets of the set, the respective magnets are installed so that the magnets of the other set are located approximately in the middle (L/2) of the Hall sensors.

(Embodiment) FIG. 1 is a sectional view of a main part showing an embodiment of a shift position detection device for a shift operation mechanism according to the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1.

First, the configuration will be explained. In FIG. 1, 1 is a select rod, and both ends of the rod are supported by a casing so as to be slidable in the axial direction X (hereinafter referred to as the select direction). 2 is the drive shaft 3 in the select direction
The drive shaft 3 is slidably supported by the casing to prevent rattling.

Reference numeral 4 designates a select member integrally fixed to one end of the select rod 1, in which a connecting portion 5 protruding toward the drive shaft 3 and an engaging portion 6 hanging down toward the back side in FIG. 1 are integrally formed. . That is, the engaging portion 6 is perpendicular to the connecting portion 5 as shown in FIG.

Reference numeral 7 denotes a connecting member fixed to one end of the drive shaft 3, and is engaged with the connecting portion 5 at a concave portion at the tip.

Numeral 8 is a locking mechanism for preventing two shift forks from being selected at the same time, and grooves 10, 11, 1 are formed in the select rod 1 at equal intervals l.
By fitting the ball 9 into the holes 2 and 13, an appropriate selection position can be set.

Hall sensors 14, 15, 16, and 17 are arranged in parallel on the casing at equal intervals L, and magnets 18 and 19 are embedded in the select rod 1 at predetermined intervals H.
is facing.

Next, in FIG. 2, a shift fork (not shown) is fixed to each of the four shift rods 20, 21, 22, 23 arranged in parallel perpendicularly to the selection direction X of the select rod 1.
Respective shift rods 20, 21, 22, 23
Engagement member members 24, 25, 26, 27 fixed to
extends toward the engaging portion 6.

Further, the distal ends of the engaging member members 24, 25, 26, 27 are provided with recessed fitting parts 24a, 2 which can be engaged with the engaging part 6.
5a, 26a, 27a are formed, and when the select rod 1 is moved in the selection direction X every interval l between the grooves 10, 11, 12, 13 shown in FIG. 25a, 26a, 2
7a. That is, the mutual spacing between the recessed fitting portions 24a, 25a, 26a, and 27a is l, which is equal to that of the grooves 10, 11, 12, and 13.

Furthermore, when the select rod 1 is rotated in the direction of arrow Y with the engaging portion 6 engaged with any of the engaging members, a specific shift rod fixed to the engaging member is rotated. It is now possible to shift the shift fork.

For example, as shown in FIG. 2, the select rod 1 is
When the shift rod 21 is rotated in the Y direction, the shift rod 21 is shifted, and a shift fork (not shown) is moved.

Next, the operation of this configuration will be explained.

The shift fork of the shift rod 20 described above is for reversing, the shift fork of the shift rod 21 is for switching between 1st and 2nd speeds, the shift fork of shift rod 22 is for switching between 3rd and 4th speeds, and the shift fork 23 is for switching between 5th and 6th speeds. Suppose there is.

First, as shown in FIG. 1, the select rod 1 is moved into the first groove 10 by driving the select cylinder 2.
When the selection operation is performed to a position where the ball 9 and the ball 9 fit together, the engaging portion 6 shown in FIG. 2 engages with the recessed fitting portion 27a of the engaging member 27.

At this time, the Hall sensor 17 faces the magnet 19 to detect the magnetic force, and outputs a detection signal indicating that the shift fork for the 5th-6th speed has been selected.
At this time, the Hall sensor 17 and the magnet 19 are not completely aligned with each other and are slightly shifted, but they are arranged so that they overlap to the extent that the magnetic force of the magnet 19 can be detected accurately.

On the other hand, the other Hall sensors 14 to 16 do not face any of the magnets 18 and 19, and therefore do not output signals indicating that other shift forks are selected.
Although the magnet 18 and the Hall sensor 15 overlap slightly, they are offset to such an extent that the Hall sensor 15 is not affected by the magnetic force of the magnet 18.

In this way, the completion of the 5th-6th speed selection operation is detected by the specific Hall sensor 17.

Next, as shown in FIG. 3, the select rod 1 is moved into the second groove 11 by driving the select cylinder 2.
When the engaging part 6 is moved to a position where the ball 9 is fitted, the engaging part 6 engages with the recessed fitting part 26a of the engaging element member 26 shown in FIG. 2, and the 3rd-4th speed shift fork is selected. At this time, only the Hall sensor 15 is connected to the magnet 1.
Since a detection signal based on magnetic force is outputted opposite to the Hall sensor 15, switching between 3rd and 4th speeds can be detected by the signal from the Hall sensor 15.

Next, as shown in FIG. 4, the select rod 1 is moved into the third groove 12 by driving the select cylinder 2.
When the ball 9 is moved to a position where it fits, the engaging portion 6 engages with the fitting portion 25a of the engaging member 25 shown in FIG. 2, and the 1st-2nd speed shift fork is selected. At this time, only the Hall sensor 16 is connected to the magnet 1.
9 and outputs a detection signal based on magnetic force.
Therefore, the signal from the Hall sensor 16 causes 1-
Switching between two speeds can be detected.

Next, as shown in FIG. 5, the select rod 1 is moved into the fourth groove 13 by driving the select cylinder 2.
When the ball 9 is moved to a position where it fits, the engaging portion 6 engages with the recessed fitting portion 24a of the engaging member 24 shown in FIG. 2, and the backward shift fork is selected, and only the Hall sensor 14 By outputting a detection signal based on magnetic force facing the magnet 18, it is possible to detect that the backward switching has been completed. At this time, the Hall sensor 14 and the magnet 18 are not completely aligned with each other and are slightly shifted, but they are arranged so that they overlap to the extent that the magnetic force of the magnet 18 can be detected accurately.

Furthermore, although the magnet 19 and the Hall sensor 16 overlap slightly, they are offset to such an extent that the Hall sensor 16 is not affected by the magnetic force of the magnet 19.

As explained above, the number of Hall sensors corresponding to the number of each selection position is provided by selection switching, and the selection position is independently detected by a specific Hall sensor.

Next, the installation relationship between the magnets 18 and 19, the Hall sensors 14 to 17, and the grooves 10 to 13 will be explained so that detection can be performed independently by a specific Hall sensor.

First, an example of the arrangement to which the present invention is not applied is shown in the sixth example.
As shown in the figure. This is because the Hall sensors 14 to 17 are arranged at intervals l equal to the intervals l between the grooves 10 to 13, and when the select rod 1 is moved every interval l, the magnets MT are sequentially and independently opposed to specific Hall sensors. It is designed to detect the select position.

However, with such a configuration, if the spacing l between the grooves 10 to 13, which is equal to the spacing between the engaging portion 6 and the engaging element members 24 to 27 in FIG. 2, is narrow, the Hall sensors 14 to 17 will also be narrowed. I have to, but
In reality, the Hall sensors overlap each other, making it physically difficult to arrange them.

On the other hand, if the Hall sensors 14 to 17 are arranged at wide intervals in accordance with the width, the distances between the engaging member members 24 to 27 and the engaging portion 6 as well as the intervals between the grooves 10 to 13 will be increased, resulting in a smaller device. becomes impossible to realize.

The present invention has an arrangement that can solve these problems.

First, as shown in FIGS. 7 and 8, a set of arbitrary integers N each having the same number of Hall sensors is virtually set. For example, when arranging six Hall sensors, there are three sets of two Hall sensors each (N=3) as shown in Figure 7, or two sets of three Hall sensors each (N=3) as shown in Figure 8. 2) Set. When arranging an odd number of Hall sensors such as 7, two sets of 3 and 4 (N = 2) or,
There are 3 sets of 3, 2, and 2 (N=3).

In the embodiments shown in FIGS. 1 to 5, two sets (N=2) each having two Hall sensors are set.

Then, a magnet corresponding to each set is fixed to the select rod.

For example, as in the embodiment, the Hall sensors 14, 1
5 as group A, and Hall sensors 16 and 17 as group B, when the magnet 18 faces the hall sensor 14, the hall sensor 16 at the end of group B and group A A magnet 19 is placed approximately in the middle of the Hall sensor 15 at the final end.

With this arrangement, only one Hall sensor can receive the magnetic force from the magnet and output a detection signal.

Further, as in this embodiment, even if the distance between the Hall sensors is larger than the selection distance, the Hall sensors can detect even the movement of the selection distance, so the speed change operation mechanism can be made smaller.

(Effects of the Invention) As explained above, according to the present invention, when the select rod is moved to a plurality of select positions set at constant select intervals, one end of the select rod engages with a specific shift fork, thereby selecting the select position. In the speed change operating mechanism that operates, a plurality of Hall sensors equal to the select position are used as select position detection elements, and all Hall sensors are equal in number, but if the total number of Hall sensors is an integer, at most one Hall sensor is different. At the same time, the interval between adjacent Hall sensors is set to an integer N times the select interval, one magnet is provided on the select rod for each set of virtual set, and the select interval is set as follows. When one set of Hall sensors and the magnet provided corresponding to the set face each other through a selection operation, the magnets provided facing the other set are arranged at the selected interval between the Hall sensors. Since it is located at a predetermined position divided by an integer N and is placed so as not to face any Hall sensor, the Hall sensor can be placed even if the selection interval is shortened, and a small shift operation mechanism can be used. can be provided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of a speed change operation mechanism according to the present invention, and FIG.
FIGS. 3 to 5 are cross-sectional views of essential parts for explaining the operation of this embodiment, and FIGS. 6 to 8 are explanatory views for explaining the principle of the present invention. 1: Select rod, 2: Select cylinder,
3: Drive shaft, 4: Select member, 5: Connecting part,
6: engaging portion, 7: connecting member, 9: ball, 10,
11, 12, 13: Groove, 14, 15, 16, 1
7: Hall sensor, 18, 19: Magnet, 20, 2
1, 22, 23: Shift rod, 24, 25, 2
6, 27: Engagement member, 24a, 25a, 26
a, 27a: recessed fitting part.

Claims (1)

[Claims] 1. In a shift operation mechanism that performs a select operation by engaging a specific shift fork with one end of the select rod when the select rod is moved to a plurality of select positions set at constant select intervals, A plurality of Hall sensors equal to the selected position are provided as position detection elements, and if the total number of Hall sensors is an odd number, a set of arbitrary integers N having different Hall sensors at most by one is virtually set, and , set the interval between adjacent Hall sensors to an integer N times the selection interval,
One magnet is provided on the select rod for each virtual set, and by performing a selection operation at each select interval, any one set of Hall sensors and the magnet provided corresponding to the set face each other. When,
The magnets provided opposite to the other sets are located at predetermined positions where the selection interval is equally divided by an integer N between the Hall sensors, and are arranged so as not to face any of the Hall sensors. Gear shift operation mechanism.