WO2011096066A1

WO2011096066A1 - Device for detecting shift/select position in parallel-shaft transmission for vehicle

Info

Publication number: WO2011096066A1
Application number: PCT/JP2010/051642
Authority: WO
Inventors: 清水　健次
Original assignee: トヨタ自動車株式会社
Priority date: 2010-02-04
Filing date: 2010-02-04
Publication date: 2011-08-11

Abstract

Disclosed is a low-cost device for detecting shift/select positions in a parallel-shaft transmission for a vehicle, capable of detecting the operative position of a shift/select shaft with a small number of sensors. Specifically, the device comprises a member (40) for operative position detection having a plurality of surfaces to be detected formed such that distances (G) between the surfaces and a gap sensor (38) differ for each of the select positions and the shift positions of a shift/select shaft (14); and an operative-position determining means (74) that determines the shift position and the select position of the shift/select shaft (14) on the basis of the distance (G) between the gap sensor (38) and the member (40) for operative position detection from a predetermined relationship. Since the shift position and the select position of the shift/select shaft (14) can be detected using only one gap sensor (38), for example, no additional sensors are required, and the production cost can be reduced.

Description

Shift select operation position detecting device for parallel shaft transmission for vehicle

The present invention relates to a shift select operation position detection device for a parallel shaft transmission for a vehicle, and more particularly to a technique for reducing manufacturing costs.

It has an engagement arm projecting on the outer peripheral side, is provided so as to be rotatable around the axis and movable in the axial direction, and is predetermined in one of the axial direction and the circumferential direction around the axis. A plurality of predetermined select operation positions that are selected in one of the plurality of select operation positions, and are located in one of the plurality of select operation positions in the circumferential direction around the axis and in the other direction of the axis direction. When the shift operation is performed to any one of the shift operation positions of the vehicle, the operation position of the shift select shaft is detected in the parallel shaft transmission for a vehicle including the shift select shaft that switches the gear stage via the engagement arm. A shift-select operation position detecting device for doing this is known. For example, it is described in Patent Document 1.

The shift select operation position detection device described in Patent Document 1 includes a plurality of select operation position detection hall sensors and a plurality of shift operation position detection hall sensors arranged on the outer peripheral side of the shift select shaft, A plurality of magnets that are integrally fixed to the outer peripheral surface of the select shaft and that switch the detection state of each of the hall sensors in accordance with the operation position of the shift select shaft, and that each of the hall sensors is detected from a predetermined relationship. The operation position of the shift select shaft is determined based on the state.

JP-A-6-293225

However, the conventional shift select operation position detection device has a problem that the manufacturing cost is high because a plurality of hall sensors and magnets are required.

The present invention has been made against the background of the above circumstances, and an object of the present invention is to provide a shift select for a low-cost parallel shaft transmission for a vehicle that can detect the operation position of the shift select shaft with a small number of sensors. An object of the present invention is to provide an operation position detection device.

In order to achieve this object, the gist of the invention according to claim 1 is that: (a) an engagement arm projecting on the outer peripheral side of the rod is provided so as to be rotatable around the axis and in the axial direction. Selectable to any one of a plurality of select operation positions determined in advance in one of the axial direction and a circumferential direction around the axis, and is selected from the plurality of select operation positions. 1 is shifted to any one of a plurality of predetermined shift operation positions located in the other direction of the axial direction and the circumferential direction around the axial center. Shift select operation position detecting device for detecting an operation position of the shift select shaft in a parallel shaft transmission for a vehicle having a shift select shaft for switching gear positions And (b) a gap sensor provided at a fixed position on the outer peripheral side of the shift select shaft, and (c) a distance between the shift sensor and the gap sensor fixed to the shift select shaft. And an operation position detecting member having a plurality of detected surfaces different for each of a plurality of shift operation positions.

Further, the gist of the invention according to claim 2 is that, in the invention according to claim 1, the detected surface of the operation position detecting member has a distance detected by the gap sensor of the shift select shaft. It is different in each of the plurality of select operation positions in the one direction and different from any of the plurality of shift operation positions of the shift select shaft.

The gist of the invention according to claim 3 is that, in the invention according to claim 2, the plurality of detected surfaces of the operation position detecting member are continuously adjacent to each other in the one direction and the other direction. It is that it is formed.

The gist of the invention according to claim 4 is that, in the invention according to any one of claims 1 to 3, the detected surface of the operation position detecting member has a distance detected by the gap sensor. The shift operation position on the low speed stage side is smaller than the shift operation position on the high speed stage side of the shift select shaft.

The gist of the invention according to claim 5 is that, in the invention according to any one of claims 1 to 4, the gap sensor detected by the gap sensor and the operation position from a predetermined relationship. There is an operation position determining means for determining the operation position of the shift select shaft based on the distance to the detection member.

According to the shift select operation position detecting device for a parallel shaft transmission for a vehicle of the first aspect of the present invention, the distance between the gap sensor provided at a fixed position on the outer peripheral side of the shift select shaft and the gap sensor. Includes an operation position detecting member having a plurality of detected surfaces that differ for each of a plurality of shift operation positions of the shift select shaft, so that the shift operation of the shift select shaft is performed based on the distance detected by the gap sensor. Since the position can be detected by a small number of, for example, one gap sensor, it is not necessary to provide a plurality of sensors, for example, and the manufacturing cost can be reduced.

According to the shift select operation position detecting device of the invention of claim 2, the detected surface of the operation position detecting member has a distance detected by the gap sensor for each of the plurality of select operation positions of the shift select shaft. Since it is different and formed so as to be different from any of a plurality of shift operation positions of the shift select shaft, the select operation position is detected by a small number of gap sensors, for example, in addition to the shift operation position of the shift select shaft. Therefore, it is not necessary to provide a plurality of sensors, for example, and the manufacturing cost can be reduced.

According to the shift select operation position detection device of the invention of claim 3, the plurality of detection surfaces of the operation position detection member are continuously formed adjacent to each other in the one direction and the other direction. Therefore, it is possible to detect the stroke of at least one of the shift direction and the select direction of the shift select shaft based on the distance detected by the gap sensor from a predetermined relationship, and the operation amount from the original operation position. Can be estimated.

According to the shift select operation position detecting device of the invention of claim 4, the detected surface of the operation position detecting member has a distance detected by the gap sensor at the shift operation position on the high speed stage side of the shift select shaft. Since the shift operation position on the low speed stage side is formed so as to be smaller than that, the detection accuracy of the shift operation position on the low speed stage side is improved. Here, when the vehicle drive source, for example, the engine rotation speed control is performed according to the shift stage of the vehicle parallel shaft transmission determined from the shift operation position, the engine rotation speed due to erroneous detection of the shift operation position. The shock generated in the vehicle due to the sudden change in the value increases as the shift operation position on the low speed stage side is erroneously detected. Therefore, with the above configuration, since the erroneous detection of the shift operation position on the low speed stage side is reduced, the shock generated in the vehicle is reduced.

According to the shift select operation position detecting device of the invention according to claim 5, based on a predetermined relationship, based on the distance between the gap sensor detected by the gap sensor and the operation position detecting member. Since the operation position determination means for determining the operation position of the shift select shaft is included, based on the distance detected by the gap sensor, the shift operation position and the select operation position of the shift select shaft are set to a small number, for example, one Since it can detect with a gap sensor, it is not necessary to provide a some sensor, for example, and manufacturing cost can be reduced.

It is a figure which shows the principal part of the speed change operation mechanism of the parallel-shaft transmission for vehicles with which this invention was applied. It is a figure which expands and shows the shift select shaft shown in FIG. 1, and its peripheral part. It is a figure which shows the III arrow part of the shift select shaft 14 of FIG. FIG. 3 is a diagram showing a state in which the shift select shaft of FIG. 2 is shifted to a reverse shift operation position located on one side in the circumferential direction of a first select operation position. FIG. 3 is a diagram showing a state in which the shift select shaft of FIG. 2 is shifted to a first shift operation position and a second shift operation position that are located on one side and the other side in the circumferential direction of a second select operation position, respectively. FIG. 3 is a diagram showing a state in which the shift select shaft of FIG. 2 is shifted to a third shift operation position and a fourth shift operation position that are located on one side and the other side in the circumferential direction of a third select operation position, respectively. It is a figure which shows the state by which the shift select shaft of FIG. 2 was respectively shifted to the 5th shift operation position and the 6th shift operation position which are located in the circumferential direction one side and the other side of the 4th select operation position. It is a functional block diagram explaining the control function of the electronic control apparatus which functions as a control part of a shift select operation position detection apparatus. It is a figure which shows the predetermined relationship between the distance detected and supplied by a gap sensor, and the operation position of a shift select shaft. It is a figure for demonstrating the shape of the member for operation position detection fixed to the shift select shaft of the shift select operation position detection apparatus in the other Example of this invention. It is sectional drawing for demonstrating the shape of the member for operation position detection fixed to the shift select shaft of the shift select operation position detection apparatus in the other Example of this invention. It is a figure for demonstrating the shape of the member for operation position detection fixed to the shift select shaft of the shift select operation position detection apparatus in the other Example of this invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are appropriately simplified or modified for ease of explanation, and the dimensional ratios, shapes, and the like of the respective parts are not necessarily drawn accurately.

FIG. 1 is a diagram showing a main part of a shift operation mechanism 10 of a parallel shaft transmission for a vehicle to which the present invention is applied. The parallel-shaft transmission for a vehicle includes, for example, an input shaft and an output shaft that are provided in parallel to each other, a plurality of gear pairs that have different gear ratios and are always meshed, and the gear pairs. Including a well-known so-called always-meshing parallel shaft type speed change mechanism including a plurality of synchronous meshing clutches for selectively switching the power transmission state between the shafts through any one of Has been. The speed change mechanism of the present embodiment includes, for example, six forward gear pairs and one reverse gear pair, and seven synchronous mesh clutches respectively provided on them. Then, by selectively switching the power transmission state between the input shaft and the output shaft made through any one of the seven gear pairs, the forward first gear having a different gear ratio is used. Shifting is performed between the sixth to sixth gears and the reverse gear. The speed change operation mechanism 10 is for changing the speed of the speed change mechanism by switching the engagement state of the seven synchronous mesh clutches of the speed change mechanism. The first gear stage and the second gear stage correspond to the low speed stage in the present invention, and the fifth gear stage and the sixth gear stage correspond to the high speed stage in the present invention.

As shown in FIG. 1, the speed change operation mechanism 10 can rotate around an axis C1 indicated by arrows a and b in the transmission case 12 and can move in an axis C1 direction indicated by an arrow c in FIG. And a plurality of shift fork shafts movably provided in axial directions orthogonal to the direction parallel to the axis C1. The plurality of shift fork shafts include a first shift fork shaft and a second shift fork shaft (not shown), a third shift fork shaft 16, and a fourth shift fork shaft 18.

The shift select shaft 14 is elongated in the direction of the axis C1, and can be rotated around the axis C1 and moved in the direction of the axis C1 by, for example, a bearing (not shown) provided in the transmission case 12. The shaft-shaped member 20 supported at both ends and a part of the outer periphery thereof, for example, by spline fitting, cannot be rotated relative to the shaft-shaped member 20 around the axis C1 and cannot move relative to the axis C1. And a cylindrical member 24 having an engaging arm 22 projecting integrally from the outer peripheral surface partially to the outer peripheral side. The shift select shaft 14 is selected to any one of a plurality of select operation positions predetermined in the direction of the axis C1, and is positioned in the circumferential direction around the axis C1 at any one of the plurality of select operation positions. The gear stage is switched via the engagement arm 22 when the shift operation is performed to any one of a plurality of predetermined shift operation positions. The direction of the axis C1 corresponds to one of the axial direction and the circumferential direction around the axis in the present invention, and the circumferential direction around the axis C1 corresponds to the axial direction and the axis in the present invention. This corresponds to the other circumferential direction.

The shift select shaft 14 of this embodiment has a first select operation position, a second select operation position, which are sequentially positioned in the axial center C1 direction in the axial center C1 direction, that is, in the select direction indicated by an arrow c in FIG. The select operation is performed at any one of the third select operation position and the fourth select operation position.

In the circumferential direction around the axis C1 of the first select operation position, that is, in the shift direction indicated by arrows a and b in FIG. 1, the shift select shaft 14 is one side in the circumferential direction of the first select operation position. The shift operation is performed to the reverse shift operation position located on the arrow a side in FIG. The reverse shift operation position is a shift operation position for shifting the speed change mechanism to the reverse gear.

The shift select shaft 14 is located on one side and the other side in the circumferential direction of the second select operation position, that is, on the arrow b side in FIG. The shift operation is performed to any one of the first shift operation position and the second shift operation position. The first shift operation position and the second shift operation position are shift operation positions for shifting the speed change mechanism to the first gear stage and the second gear stage, respectively. Equivalent to.

Further, in the circumferential direction around the axis C1 of the third select operation position, the shift select shaft 14 has a third shift operation position and a first position located on one side and the other side in the circumferential direction of the third select operation position. The shift operation is performed to any one of the four shift operation positions. The third shift operation position and the fourth shift operation position are shift operation positions for shifting the speed change mechanism to the third gear stage and the fourth gear stage, respectively.

The shift select shaft 14 has a fifth shift operation position and a fifth shift operation position located on one side and the other side in the circumferential direction of the fourth select operation position in the circumferential direction around the axis C1 of the fourth select operation position. The shift operation is performed to any one of the 6 shift operation positions. The fifth shift operation position and the sixth shift operation position are shift operation positions for shifting the speed change mechanism to the fifth gear stage and the sixth gear stage, respectively. Equivalent to. FIG. 1 shows a state where the shift select shaft 14 is located at the third select operation position.

Each of the first to fourth shift fork shafts has a longitudinal shape in each axial direction, and is provided with a shaft portion 26 supported at both ends by, for example, bearings provided in the transmission case 12, and each shaft portion. 26. An engaging arm 22 of the shift select shaft 14 that protrudes integrally from the outer peripheral surface of the gear 26 toward the shift select shaft 14 side, and is operated at a predetermined select operation position in each axial direction at the tip thereof. And an engagement arm portion 30 formed with an engagement groove 28 that can be engaged. These first to fourth shift fork shafts are arranged in parallel to each other with the engagement grooves 28 of the respective engagement arm portions 30 being connected in the direction parallel to the axis C1.

The first shift fork shaft is fixedly provided with a first fork member that engages with a sleeve of the synchronous meshing clutch that is involved in the establishment of the reverse gear of the speed change mechanism among the plurality of synchronous meshing clutches. . Further, the second shift fork shaft is engaged with a sleeve of a synchronous meshing clutch that is involved in establishment of the first gear stage and the second gear stage of the transmission mechanism among the plurality of synchronous meshing clutches. A fork member is fixed. In addition, the third shift fork shaft 16 is engaged with a sleeve of the synchronous meshing clutch that is involved in the establishment of the third gear stage and the fourth gear stage of the transmission mechanism among the plurality of synchronous meshing clutches. A fork member 32 is fixed. Further, the fourth shift fork shaft 18 is engaged with a sleeve of the synchronous meshing clutch involved in establishment of the fifth gear stage and the sixth gear stage of the transmission mechanism among the plurality of synchronous meshing clutches. A fork member 34 is fixed.

In the shift operation mechanism 10 configured as described above, when the shift select shaft 14 is selected, the engagement arm 22 is selectively engaged with any one of the engagement grooves 28 of each shift fork shaft. In this state, when the shift select shaft 14 is shifted, the plurality of shift fork shafts engaged with the engagement arm 22 are moved in the axial direction. As a result, the corresponding synchronous mesh clutch is operated via the fork member of the shift fork shaft moved in the axial direction, and the first to sixth gear stages and the reverse gear stage are operated in the transmission mechanism. Any one of the above is selectively established.

The parallel-shaft transmission for vehicles provided with the shift operation mechanism 10 includes a shift select operation position detection device 36 for detecting the operation position of the shift select shaft 14 of the shift operation mechanism 10.

FIG. 2 is an enlarged view showing the shift select shaft 14 shown in FIG. 1 and its peripheral portion. FIG. 3 is a view showing the III arrow portion of the shift select shaft 14 of FIG. As shown in FIGS. 2 and 3, the shift select operation position detection device 36 is provided at a fixed position on the transmission case 12 on the outer peripheral side of the shift select shaft 14 and detects the distance G between the shift select shaft 14 and the shift select shaft 14. The distance G between the gap sensor 38 and the shift select shaft 14 is fixed to the cylindrical member 24 of the shift select shaft 14. The distance G between the gap sensor 38 and the gap sensor 38 is different for each of the plurality of select operation positions and the plurality of shift operation positions. And an operation position detecting member 40 having a plurality of detection surfaces formed differently. The detected surface of the operation position detection member 40 of the present embodiment is such that each distance G between the operation position detection member 40 and the gap sensor 38 when the shift select shaft 14 is located at a plurality of shift operation positions, respectively. They are formed different from each other. Further, the detection surface of the operation position detection member 40 is such that the distances G between the operation position detection member 40 and the gap sensor 38 when the shift select shaft 14 is positioned at a plurality of select operation positions are mutually different. The distances G are different from those of the shift operation positions of the shift select shaft 14.

The gap sensor 38 is a non-contact type, and has a detection point A at the center of the front end surface of the cylindrical detection unit facing the operation position detection member 40, and passes through the detection point A and is orthogonal to the front end surface. The distance G to the surface (detected surface) of the operation position detecting member 40 positioned in the direction of the axis C2 is detected. The gap sensor 38 includes, for example, a coil that generates a high-frequency magnetic field, and the eddy current of the operation position detection member 40 increases as the metal operation position detection member 40 approaches the coil. On the basis of this, an eddy current that can detect the distance G from the operation position detecting member 40 by measuring the degree to which the magnetic field of the coil is weakened by a magnetic field opposite to the high-frequency magnetic field generated by the eddy current. A displacement sensor can be used. Further, as the gap sensor 38, for example, a semiconductor magnetoresistor that is provided on the surface of the operation position detection member 40 by magnetizing or is disposed opposite to, for example, a magnet that generates a magnetic field fixed separately. A distance G between the semiconductor magnetoresistive element 40 and the operation position detecting member 40 can be detected based on the resistance value of the semiconductor magnetoresistive element changing according to the distance between the semiconductor magnetoresistive element and the magnet. A semiconductor magnetoresistive element displacement sensor can be used. Further, as the gap sensor 38, for example, an ultrasonic wave generating member such as a piezoelectric ceramic that generates an ultrasonic beam is provided, and the ultrasonic beam emitted from the ultrasonic wave generating member is reflected on the operation position detecting member 40. The distance G to the operation position detection member 40 can be detected based on the fact that the wave reception level when receiving the returned wave changes according to the distance to the operation position detection member 40. A possible ultrasonic sensor can be used. Further, as the gap sensor 38, for example, a laser oscillation member that oscillates a laser, and two laser diffused lights that are oscillated by the laser oscillation member and reflected by a predetermined reference plane and the operation position detection member 40, respectively. A light receiving lens for receiving light and an element for detecting the positions of the two laser diffused lights respectively formed by the light receiving lens, and based on a difference between the positions of the two laser diffused lights detected by the elements. A laser indicator that can detect the distance G between the predetermined reference plane and the operation position detecting member 40 can be used.

As shown in FIG. 3, the operation position detecting member 40 includes a first protrusion 42, a second protrusion 44, a third protrusion 46, and a first protrusion 42, which are continuously formed adjacent to each other at a predetermined interval in the direction of the axis C1. Four protrusions 48 are provided. These protrusions are disposed at positions facing the gap sensors 38 when the shift select shaft 14 is positioned at each select operation position.

On the outer peripheral surface of the first protrusion 42, a reverse shift operation detected surface 50 for detecting a distance G (Rev) between the shift select shaft 14 located at the reverse shift operation position and the gap sensor 38; A first select operation detection surface 52 for detecting the distance G (R) between the shift select shaft 14 located at the first select operation position and the gap sensor 38 is one from the other side in the circumferential direction. It is continuously formed adjacent to the side in order. The reverse shift operation detection surface 50 and the first select operation detection surface 52 are formed in a partial cylindrical surface having the axis C1 as the center line of curvature. The detection surface 50 for reverse shift operation is formed so as to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the reverse shift operation position. On the other hand, the first select operation detection surface 50 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the first select operation position. .

From the state where the shift select shaft 14 is located at the third select operation position shown in FIG. 2, the select operation is performed in the select direction parallel to the axis C1 indicated by the arrow c in FIG. When this is done, the gap sensor 38 detects the distance G (R) between the detection point A of the gap sensor 38 and the first select operation detection surface 50 facing it in the direction of the axis C2. .

Further, the shift select shaft 14 is shifted from the state where the shift select shaft 14 is positioned at the first select operation position as described above to one side in the circumferential direction as shown in FIG. When it is determined, the gap sensor 38 detects the distance G (Rev) between the detection point A of the gap sensor 38 and the reverse shift operation detection surface 52 facing the detection point A in the direction of the axis C2. The distances G (Rev) and G (R) are set so as to decrease in that order.

On the outer peripheral surface of the second protrusion 44, a first shift operation detected surface 54 for detecting a distance G (1st) between the shift select shaft 14 located at the first shift operation position and the gap sensor 38. A second select operation detection surface 56 for detecting a distance G (L) between the shift select shaft 14 and the gap sensor 38 located at the second select operation position, and a position at the second shift operation position. And a second shift operation detection surface 58 for detecting a distance G (2nd) between the shift select shaft 14 and the gap sensor 38 which are adjacent to each other in order from the other side in the circumferential direction. Is formed. The first shift operation detection surface 54, the second select operation detection surface 56, and the second shift operation detection surface 56 are partial cylindrical surfaces having the axis C1 as the center of curvature. The first shift operation detection surface 54 is formed to face the detection point A of the gap sensor 38 in the axial center C2 direction when the shift select shaft 14 is located at the first shift operation position. . The second select operation detection surface 56 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the second select operation position. The second shift operation detection surface 58 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the second shift operation position.

When the shift select shaft 14 is selected in the select direction indicated by the arrow c in FIG. 2 from the position at the third select operation position shown in FIG. A gap sensor 38 detects a distance G (L) between the detection point A of the sensor 38 and the second selection operation detection surface 56 facing the detection point A in the direction of the axis C2.

Further, the shift select shaft 14 is shifted from the state where it is positioned at the second select operation position as described above to the one side in the circumferential direction as shown by the solid line in FIG. , The distance G (1st) between the detection point A of the gap sensor 38 and the first shift operation detection surface 54 opposed to the detection point A in the direction of the axis C2 is detected by the gap sensor 38. Is done.

Further, the shift select shaft 14 is shifted from the state where it is located at the second select operation position to the other side in the circumferential direction as shown by a two-dot chain line in FIG. In some cases, the gap sensor 38 detects the distance G (2nd) between the detection point A of the gap sensor 38 and the second shift operation detection surface 58 facing the detection point A in the direction of the axis C2. The distances G (2nd), G (1st), and G (L) are set to decrease in that order. The distances G (1st) and G (2nd) are set to be smaller than the distance G (R) and smaller than distances G (6th), G (5th), and G (H) described later. ing. That is, the first to sixth shift operation detection surfaces of the operation position detection member 40 of the present embodiment have the distance G detected by the gap sensor 38 set to the shift operation position on the high speed stage side of the shift select shaft 14. Compared to the corresponding fifth shift operation position and the sixth shift operation position, the first shift operation position and the second shift operation position corresponding to the shift operation position on the low speed stage side are formed to be smaller.

A third shift operation detected surface 60 for detecting a distance G (3rd) between the shift select shaft 14 located at the third shift operation position and the gap sensor 38 is provided on the outer peripheral surface of the third protrusion 46. And a third select operation detection surface 62 for detecting the distance G (N) between the shift select shaft 14 and the gap sensor 38 located at the third select operation position, and the fourth shift operation position. And a fourth shift operation detection surface 64 for detecting a distance G (4th) between the shift select shaft 14 and the gap sensor 38 that are adjacent to each other in order from the other side in the circumferential direction. Is formed. The third shift operation detection surface 60, the third select operation detection surface 62, and the fourth shift operation detection surface 64 are partially cylindrical surfaces having the axis C1 as the center of curvature. The third shift operation detection surface 60 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the third shift operation position. . The third select operation detection surface 62 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the third select operation position. The fourth shift operation detection surface 64 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the fourth shift operation position.

As shown in FIGS. 2 and 3, when the shift select shaft 14 is positioned at the third select operation position, the third select operation facing the detection point A of the gap sensor 38 and the axis C2 with respect thereto. A distance G (N) from the detection target surface 62 is detected by the gap sensor 38.

Further, when the shift select shaft 14 is positioned at the third select operation position as described above, the shift select shaft 14 is shifted to one side in the circumferential direction as shown by a solid line in FIG. , The distance G (3rd) between the detection point A of the gap sensor 38 and the third shift operation detection surface 60 facing the detection point A in the direction of the axis C2 is detected by the gap sensor 38. Is done.

Further, the shift select shaft 14 is shifted from the state where the shift select shaft 14 is located at the third select operation position to the other side in the circumferential direction as shown by a two-dot chain line in FIG. In some cases, the gap sensor 38 detects the distance G (4th) between the detection point A of the gap sensor 38 and the fourth shift operation detection surface 64 facing the detection point A in the direction of the axis C2. The distances G (4th), G (3rd), and G (N) are set so as to decrease in that order. The distance G (4th) is set to be smaller than the distance G (N).

On the outer peripheral surface of the fourth protrusion 48, a fifth shift operation detected surface 66 for detecting a distance G (5th) between the shift select shaft 14 located at the fifth shift operation position and the gap sensor 38. And a fourth select operation detection surface 68 for detecting the distance G (H) between the shift select shaft 14 and the gap sensor 38 located at the fourth select operation position, and the sixth shift operation position. And a sixth shift operation detection surface 70 for detecting a distance G (6th) between the shift select shaft 14 and the gap sensor 38 that are adjacent to each other in order from the one side to the other side in the circumferential direction. Is formed. The fifth shift operation detection surface 66, the fourth select operation detection surface 68, and the sixth shift operation detection surface 70 are partially cylindrical surfaces having the axis C1 as the center of curvature. The fifth shift operation detection surface 66 is formed to face the detection point A of the gap sensor 38 in the axial center C2 direction when the shift select shaft 14 is located at the fifth shift operation position. . The fourth select operation detection surface 68 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the fourth select operation position. The sixth shift operation detection surface 64 is formed to face the detection point A of the gap sensor 38 in the direction of the axis C2 when the shift select shaft 14 is located at the sixth shift operation position. Note that the first to fourth select operation detection target surfaces are continuously formed adjacent to each other in the direction of the axis C1.

When the shift select shaft 14 is selected in the select direction indicated by the arrow c in FIG. 2 from the position at the third select operation position shown in FIG. A gap sensor 38 detects a distance G (H) between the detection point A of the sensor 38 and the fourth selection operation detection surface 68 facing the detection point A in the direction of the axis C2.

Further, the shift select shaft 14 is shifted from the state where it is positioned at the fourth select operation position as described above to the one side in the circumferential direction as shown by the solid line in FIG. , The distance G (5th) between the detection point A of the gap sensor 38 and the fifth shift operation detection surface 66 facing it in the direction of the axis C2 is detected by the gap sensor 38. Is done.

Further, the shift select shaft 14 is shifted from the state in the fourth select operation position to the other side in the circumferential direction as shown by a two-dot chain line in FIG. 7 and is positioned in the sixth shift operation position. Sometimes, the gap sensor 38 detects the distance G (6th) between the detection point A of the gap sensor 38 and the sixth shift operation detection surface 70 facing the detection point A in the direction of the axis C2. The distances G (6th), G (5th), and G (H) are set to decrease in that order. The distance G (6th) is set to be smaller than the distance G (R).

FIG. 8 is a functional block diagram illustrating the main part of the control function of the electronic control device 72 that functions as the control unit of the shift select operation position detection device 36. In FIG. 8, the electronic control unit 72 includes a plurality of so-called microcomputers including a CPU, a ROM, a RAM, an input / output interface, and the like, and is stored in advance in the ROM while using a temporary storage function of the RAM. By performing signal processing according to the program, the operation position detection control of the shift select shaft 14 is executed. The electronic control device 72 includes an operation position determination unit 74.

The operation position determination means 74 has a distance G between the gap sensor 38 detected by the gap sensor 38 and the operation position detection member 40 based on a predetermined relationship shown in FIG. Based on the above, the shift operation position and the select operation position of the actual shift select shaft 14 are determined. In FIG. 9, the shift stage indicates the gear stage of the transmission mechanism of the vehicle parallel shaft transmission corresponding to the operation position of the shift select shaft 14. In FIG. 9, the gap order indicates the order in which the distance G detected by the gap sensor 38 is small among the plurality of shift operation positions and the plurality of select operation positions of the shift select shaft 14.

Specifically, when the distance G is within a preset third select operation position determination range G (N) min to G (N) max, the operation position determining means 74 determines that the shift select shaft 14 is in the third select position. It is determined that it is located at the operation position.

Further, the operation position determination means 74 indicates that the shift select shaft 14 is at the third shift operation position when the distance G is within a preset third shift operation position determination range G (3rd) min to G (3rd) max. It is determined that it is located.

Further, the operation position determination means 74 indicates that the shift select shaft 14 is at the fourth shift operation position when the distance G is within a preset fourth shift operation position determination range G (4th) min to G (4th) max. It is determined that it is located.

Further, the operation position determining means 74 is configured such that when the distance G is within a preset second select operation position determination range G (L) min to G (L) max, the shift select shaft 14 is set to the second select operation position. It is determined that it is located.

Further, the operation position determination means 74 is configured such that when the distance G is within a preset first shift operation position determination range G (1st) min to G (1st) max, the shift select shaft 14 is set to the first shift operation position. It is determined that it is located.

In addition, the operation position determination means 74 indicates that the shift select shaft 14 is at the second shift operation position when the distance G is within a preset second shift operation position determination range G (2nd) min to G (2nd) max. It is determined that it is located.

Further, the operation position determining means 74 is configured such that when the distance G is within a preset fourth select operation position determination range G (H) min to G (H) max, the shift select shaft 14 is set to the fourth select operation position. It is determined that it is located.

In addition, the operation position determination means 74 determines that the shift select shaft 14 is at the fifth shift operation position when the distance G is within a preset fifth shift operation position determination range G (5th) min to G (5th) max. It is determined that it is located.

In addition, the operation position determination means 74 determines that the shift select shaft 14 is at the sixth shift operation position when the distance G is within a preset sixth shift operation position determination range G (6th) min to G (6th) max. It is determined that it is located.

Further, the operation position determination means 74 determines that the shift select shaft 14 is at the first select operation position when the distance G is within a preset first select operation position determination range G (R) min to G (R) max. It is determined that it is located.

Further, the operation position determination means 74 determines that the shift select shaft 14 is positioned at the reverse shift operation position when the distance G is within a preset reverse shift operation position determination range G (Rev) min to G (Rev) max. judge.

The detection result of the operation position of the shift select shaft 14 by the operation position determination means 74 is, for example, from the relationship shown in FIG. 9, the actual gear stage (shift stage) of the vehicle parallel shaft transmission (transmission mechanism). This is used to determine which of the first to sixth gears and the reverse gear is. The determination result of the gear stage of the vehicle parallel shaft transmission is used, for example, for a vehicle drive source, for example, engine rotational speed control. The engine rotational speed control includes, for example, control for suppressing a shock generated in the vehicle when the vehicle parallel shaft transmission is shifted.

As described above, according to the shift select operation position detection device 36 of the parallel shaft transmission for a vehicle of the present embodiment, the distance G between the gap sensor 38 and the shift select shaft 14 includes a plurality of select operation positions and a plurality of select operation positions. The distance G between the gap sensor 38 and the operation position detection member 40 based on a predetermined relationship between the operation position detection member 40 having a plurality of detection surfaces formed differently for each shift operation position. The shift operation position of the shift select shaft 14 and the operation position determination means 74 for determining the select operation position. Accordingly, the shift operation position and the select operation position of the shift select shaft 14 are determined by one gap sensor 38. For example, it is not necessary to provide a plurality of sensors and the manufacturing cost can be reduced. Door can be.

Further, according to the shift select operation position detection device 36 of the present embodiment, the first to sixth shift operation detection surfaces and the first to fourth selection operation detection surfaces of the operation position detection member 40 are shifted. Are formed adjacent to each other in the direction and the select direction, and based on the distance G detected by the gap sensor 38, the shift direction and the select direction of the shift select shaft 14 are determined based on a predetermined relationship. At least one stroke can be detected, and the operation amount from the original operation position can be estimated. From such an operation amount, for example, it is possible to determine a jump gear shift operation and to perform control corresponding thereto, for example, engine output control.

Further, according to the shift select operation position detection device 36 of the present embodiment, the first to sixth shift operation detection surfaces of the operation position detection member 40 have a distance G detected by the gap sensor 38 so that the shift select is detected. Compared to the fifth shift operation position and the sixth shift operation position corresponding to the shift operation position on the high speed stage side of the shaft 14, the first shift operation position and the second shift operation position corresponding to the shift operation position on the low speed stage side are compared. Therefore, the detection accuracy of the shift operation position on the low speed stage side is improved. Here, when the vehicle drive source, for example, the rotational speed control of the engine is controlled according to the gear position of the vehicle parallel shaft transmission determined from the detection result of the shift operation position of the operation position determination means 74, the shift operation is performed. The shock generated in the vehicle due to a sudden change in the rotational speed of the engine due to erroneous position detection increases as the shift operation position on the low speed stage side is erroneously detected. Therefore, with the above configuration, erroneous detection of the first shift operation position and the second shift operation position is reduced, so that the shock generated in the vehicle is reduced.

As mentioned above, although one Example of this invention was described in detail with reference to drawings, this invention is not limited to this Example, It can implement in another aspect.

For example, the distance G from the gap sensor 38 of each detection surface formed on the operation position detection member 40 does not necessarily have to be formed so as to be different in the order as in the above-described embodiment. For example, instead of the operation position detection member 40 fixed to the shift select shaft 14 of the above-described embodiment, an operation position detection member 80 shown in FIG. 10 may be provided. The operation position detecting member 80 has a distance G detected by the gap sensor 38 such that the second select operation position, the first shift operation position, the second shift operation position, the third select operation position, and the third select operation position of the shift select shaft 14. The third shift operation position, the fourth shift operation position, the fourth select operation position, the fifth shift operation position, and the sixth shift operation position are formed in this order. In short, if the distance G detected by the gap sensor 38 is formed so as to be different for each of the plurality of shift operation positions and the plurality of select operation positions of the shift select shaft 14, the shift of the shift select shaft 14 by one sensor is performed. The effect that the operation position and the select operation position can be detected is obtained.

Further, the first to sixth shift operation detection surfaces have a distance G detected by the gap sensor 38 that is not necessarily in the shift operation position on the low speed stage side compared to the shift operation position on the high speed stage side of the shift select shaft 14. It does not need to be formed to be smaller. For example, instead of the operation position detection member 40 fixed to the shift select shaft 14 of the above-described embodiment, an operation position detection member 90 shown in FIG. 11 may be provided. The operation position detecting member 90 has a distance G detected by the gap sensor 38 such that the fourth select operation position, the fifth shift operation position, the sixth shift operation position, the second select operation position, and the second select operation position of the shift select shaft 14. The first shift operation position, the second shift operation position, the third select operation position, the third shift operation position, and the fourth shift operation position are formed in this order.

In the above-described embodiment, the distance G detected by the gap sensor 38 is formed so as to be different for each of the plurality of select operation positions of the shift select shaft 14, but is not necessarily different for each select operation position. There is no need to be done. For example, instead of the operation position detection member 40 fixed to the shift select shaft 14 of the above-described embodiment, an operation position detection member 100 shown in FIG. 12 may be provided. The operation position detecting member 100 is formed such that the distance G detected by the gap sensor 38 does not change for each of the plurality of select operation positions of the shift select shaft 14. Further, the operation position detecting member 100 has a distance G detected by the gap sensor 38 as compared with the shift operation position located on one side in the circumferential direction of the predetermined select operation position of the shift select shaft 14. A shift operation position located on the other side in the circumferential direction of a predetermined select operation position is formed to be smaller. Further, the operation position detecting member 100 has a distance G detected by the gap sensor 38 as compared to a predetermined select operation position among the plurality of select operation positions of the shift select shaft 14 and one side in the circumferential direction thereof. The shift operation position on the other side is formed to be smaller. In short, if the distance G detected by the gap sensor 38 is different for each of the plurality of shift operation positions of the shift select shaft 14, the shift operation position of the shift select shaft 14 can be detected by one sensor. The effect of being able to be obtained.

Further, each detected surface does not necessarily have to be formed in a partial cylindrical surface with the axis C1 as the center line of curvature. For example, each detected surface may be formed in a curved surface having a center of curvature other than the axis C1, or may be formed in a flat shape.

In addition to the eddy current displacement sensor, the semiconductor magnetoresistive element displacement sensor, the ultrasonic sensor, and the displacement sensor that detects the gap with the measurement surface using the laser light as the gap sensor 38 of the above-described embodiment. The operation position detection member 40 can be applied as long as the distance G between each non-detection surface of the operation position detection member 40 can be detected.

Further, the shift operation mechanism 10 of the above-described embodiment is of a type in which the shift select shaft 14 and the first to fourth shift fork shafts are disposed so as to be orthogonal to each other. The present invention can be applied even if the type is arranged in the above.

It should be noted that the above description is merely an embodiment, and other examples are not illustrated. However, the present invention is implemented in variously modified and improved modes based on the knowledge of those skilled in the art without departing from the gist of the present invention. Can do.

14: Shift select shaft 22: Engagement arm 36: Shift select operation position detection device 38:

Gap sensors

40, 80, 90, 100: Operation position detection member 74: Operation position determination means C1: Axes G, G (R ), G (L), G (N), G (H), G (Rev), G (1st), G (2nd), G (3rd), G (4th), G (5th), G (6th ):distance

Claims

One of the axial direction and the circumferential direction around the axial center is provided with an engaging arm projecting on the outer peripheral side so as to be rotatable around the axial center and movable in the axial direction. Is selected in any one of a plurality of predetermined select operation positions, and is positioned in the other direction of the axial direction and the circumferential direction around the axial center in any one of the multiple select operation positions. In a vehicle parallel shaft transmission including a shift select shaft that switches a gear stage through the engagement arm by being shifted to any one of a plurality of predetermined shift operation positions, the shift select shaft A shift select operation position detection device for detecting the operation position of
A gap sensor provided at a fixed position on the outer peripheral side of the shift select shaft;
An operation position detecting member fixed to the shift select shaft and having a plurality of detection surfaces whose distance from the gap sensor is different for each of the plurality of shift operation positions of the shift select shaft;
A shift select operation position detecting device for a parallel shaft transmission for a vehicle.
The detected surface of the operation position detection member has a distance detected by the gap sensor that is different for each of the plurality of select operation positions in the one direction of the shift select shaft, and the plurality of shifts of the shift select shaft. 2. The shift select operation position detecting device for a parallel shaft transmission for a vehicle according to claim 1, wherein the position is different from any of the operation positions.
The parallel shaft type transmission for a vehicle according to claim 2, wherein the plurality of detection surfaces of the operation position detection member are continuously formed adjacent to each other in the one direction and the other direction. Shift select operation position detection device.
The detected surface of the operation position detecting member is such that the distance detected by the gap sensor is smaller at the shift operation position on the low speed stage side than on the shift operation position on the high speed stage side of the shift select shaft. The shift select operation position detecting device for a parallel shaft transmission for a vehicle according to any one of claims 1 to 3, wherein
Operation position determination means for determining an operation position of the shift select shaft based on a distance between the gap sensor detected by the gap sensor and the operation position detection member based on a predetermined relationship. The shift select operation position detecting device for a parallel shaft transmission for a vehicle according to any one of claims 1 to 4.