JP2019158570A - Sensor unit - Google Patents

Abstract

To provide a sensor unit which, of a compact construction though, is compatible with a redundancy system (dual system).SOLUTION: A sensor unit 40 is fixed to a spool container that accommodates a spool valve and detects the position of the spool valve, comprising: a single case equipped with a space inside; a plurality of magnetic sensor elements 42, 43 for detecting the position of the spool valve and arranged in the space; a common bus bar 44 for power supply arranged in the space and electrically connected to power supply terminals 42a, 43a of the plurality of magnetic sensor elements 42, 43; and a common bus bar 45 for grounding arranged in the space and electrically connected to grounding terminals 42c, 43c of the plurality of magnetic sensor elements 42, 43.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a sensor unit.

  Conventionally, a spool valve is known as a hydraulic control valve. For example, Patent Document 1 describes a twin-clutch automatic manual transmission to which a shift actuator having a spool valve is applied.

Japanese Patent No. 4946217

  The shift actuator described in Patent Document 1 includes a columnar spool valve and a housing, and the spool valve is accommodated so as to be slidable in the axial direction with respect to a spool hole provided in the housing. A magnet is provided inside the spool valve, and a magnetic sensor is provided inside the housing. When the spool valve moves in the axial direction, the magnetic sensor detects a change in the magnetic field generated by the magnet and detects the position of the spool valve.

  According to the configuration disclosed in Patent Document 1, the axial position of the spool valve can be detected. However, since the configuration of Patent Document 1 detects the magnetic field of the magnet by one magnetic sensor, the position of the spool valve cannot be detected if a failure occurs in the magnetic sensor. There was a need for a dual system.

  In order to configure a redundant system, it may be possible to provide two existing magnetic sensors, but usually there is not enough space in the housing around the spool valve to install the two magnetic sensors. There are many cases. Moreover, even if two magnetic sensors can be installed in the housing, there is a problem that the entire apparatus becomes large.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a sensor unit corresponding to a redundant system (double system) while having a compact configuration. .

  One aspect of the sensor unit of the present invention is a sensor unit that is fixed to a spool housing body that houses a spool valve and detects the position of the spool valve, and includes a single case having a space therein, A plurality of sensor elements that detect the position of the spool valve, a common power bus bar that is arranged in the space and is electrically connected to the power supply terminal of each sensor element, A common ground bus bar electrically connected to the ground terminal of the sensor element.

  According to one aspect of the present invention, a sensor unit corresponding to a redundant system (double system) is realized while having a compact configuration.

FIG. 1 is a perspective view showing a configuration of a valve device on which a sensor unit according to an embodiment of the present invention is mounted. FIG. 2 is an exploded perspective view showing the configuration of the valve device in which the sensor unit according to the embodiment of the present invention is mounted. FIG. 3 is a diagram showing a configuration of a valve device on which a sensor unit according to an embodiment of the present invention is mounted, and is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a front view of the valve device on which the sensor unit according to the embodiment of the present invention is mounted. FIG. 5 is a plan view showing the configuration of the sensor unit according to the embodiment of the present invention. 6 is a plan view showing a state where a cable is removed from the sensor unit of FIG. FIG. 7 is an enlarged view of a portion A (portion surrounded by a broken line) in FIG. FIG. 8 is a circuit diagram of the sensor unit according to the embodiment of the present invention.

  In each figure, the Z-axis direction is a vertical direction Z. The X-axis direction is the left-right direction X in the horizontal direction orthogonal to the up-down direction Z. The Y-axis direction is an axial direction Y orthogonal to the left-right direction X in the horizontal direction orthogonal to the vertical direction Z. The positive side in the vertical direction Z is called “upper side”, and the negative side is called “lower side”. The positive side of the axial direction Y is called “front side”, and the negative side is called “rear side”. The front side corresponds to one side in the axial direction, and the rear side corresponds to the other side in the axial direction. The upper side, the lower side, the front side, the rear side, the up-down direction, and the left-right direction are simply names for explaining the relative positional relationship of each part, and the actual arrangement relationship and the like are the arrangements indicated by these names. It may be an arrangement relationship other than the relationship.

  FIG. 1 is a perspective view showing a configuration of a valve device 10 on which a sensor unit 40 according to an embodiment of the present invention is mounted. FIG. 2 is an exploded perspective view showing the configuration of the valve device 10. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is a view of the valve device 10 as viewed from the front side. The valve apparatus 10 shown in FIGS. 1-4 is a control valve mounted in a vehicle, for example. The valve device 10 includes an oil passage body 20, a spool valve 30, a magnet holder 80, a magnet 50, an elastic member 70, a fixing member 71, and a sensor unit 40. The sensor unit 40 of this embodiment is a device that is fixed to an oil passage body 20 (spool housing) that houses the spool valve 30 and detects the position of the spool valve 30.

(Configuration of valve device 10)
As shown in FIG. 3, the oil passage body 20 has an oil passage 10a through which oil flows. The part of the oil passage 10a shown in FIG. 3 is a part of a spool hole 23 described later. In each figure, the state which cut out some oilway bodies 20 is shown, for example. As shown in FIG. 1, the oil passage body 20 includes a lower body 21 and an upper body 22. Although illustration is omitted, the oil passage 10a is provided in both the lower body 21 and the upper body 22, for example.

  The lower body 21 includes a lower body main body 21a and a separate plate 21b disposed so as to overlap the upper side of the lower body main body 21a. In the present embodiment, the upper surface of the lower body 21 corresponds to the upper surface of the separate plate 21 b and is orthogonal to the vertical direction Z. The upper body 22 is disposed so as to overlap the upper side of the lower body 21. The lower surface of the upper body 22 is orthogonal to the vertical direction Z. The lower surface of the upper body 22 is in contact with the upper surface of the lower body 21, that is, the upper surface of the separate plate 21b.

  As shown in FIG. 3, the upper body 22 has a spool hole 23 extending in the axial direction Y. In the present embodiment, the cross-sectional shape orthogonal to the axial direction Y of the spool hole 23 is a circular shape centered on the central axis J. The central axis J extends in the axial direction Y. The radial direction centered on the central axis J is simply called “radial direction”, and the circumferential direction centered on the central axis J is simply called “circumferential direction”.

  The spool hole 23 opens at least on the front side. In the present embodiment, the rear end of the spool hole 23 is closed. That is, the spool hole 23 is a hole that opens to the front side and has a bottom. The spool hole 23 may be opened on both sides in the axial direction Y, for example. At least a part of the spool hole 23 constitutes a part of the oil passage 10 a in the oil passage body 20.

  The spool hole 23 has a spool hole body 23a and an introduction hole portion 23b. Although illustration is omitted, an oil passage 10a provided in a portion other than the spool hole 23 in the oil passage body 20 opens on the inner peripheral surface of the spool hole body 23a. The inner diameter of the introduction hole portion 23b is larger than the inner diameter of the spool hole body 23a. The introduction hole 23b is connected to the front end of the spool hole body 23a. The introduction hole portion 23b is an end portion on the front side of the spool hole 23 and opens to the front side.

  As shown in FIG. 1, the spool hole 23 has a groove portion 24 that is recessed radially outward from the inner peripheral surface of the spool hole 23 and extends in the axial direction Y. In the present embodiment, a pair of the groove portions 24 are provided with the central axis J interposed therebetween. The pair of groove portions 24 are recessed on both sides in the left-right direction X from the inner peripheral surface of the introduction hole portion 23b. The groove portion 24 is provided from the front end portion on the inner peripheral surface of the introduction hole portion 23b to the rear end portion on the inner peripheral surface of the introduction hole portion 23b. As shown in FIG. 4, the inner side surface 24 a of the groove portion 24 has a semicircular arc shape that is recessed radially outward from the inner peripheral surface of the introduction hole portion 23 b when viewed from the front side.

  As shown in FIG. 3, the upper body 22 has through holes 22 a, 22 b, and 22 c at the front end of the upper body 22. The through hole 22a penetrates a portion from the upper surface of the upper body 22 in the upper body 22 to the inner peripheral surface of the introduction hole 23b in the vertical direction Z. The through hole 22b penetrates a portion from the lower surface of the upper body 22 to the inner peripheral surface of the introduction hole 23b in the upper body 22 in the vertical direction Z. As shown in FIG. 1, the through hole 22 a and the through hole 22 b have a rectangular shape that is long in the left-right direction X as viewed from above. The through hole 22a and the through hole 22b overlap each other when viewed from above.

  As shown in FIG. 3, the through hole 22 c penetrates the portion of the upper body 22 from the front surface of the upper body 22 to the through hole 22 b in the axial direction Y. The through hole 22 c is provided at the lower end of the front surface of the upper body 22. The through hole 22c opens downward. As shown in FIG. 4, the through hole 22 c has a rectangular shape that is long in the left-right direction X as viewed from the front side. The center of the through holes 22a, 22b, 22c in the left-right direction X is the same as the position of the central axis J in the left-right direction X, for example.

  As shown in FIG. 1, the upper body 22 has a protruding portion 22 d that protrudes one step above the other portion. The protruding portion 22d has a step portion 22e located at the front end portion and a flat portion 22f located on the rear side of the step portion 22e. The upper surface of the stepped portion 22e is a semicircular curved surface that protrudes upward. The upper surface of the plane portion 22f is a plane parallel to the left-right direction X and the axial direction Y, and the sensor unit 40 is mounted on the upper surface of the plane portion 22f. Further, the upper end portion of the curved surface of the step portion 22e is higher than the flat surface portion 22f and protrudes above the flat surface portion 22f. The sensor unit 40 is positioned by the contact portion 41b of the sensor unit 40 being applied to the rear end surface of the upper end portion of the step portion 22e, and is fixed to the flat portion 22f.

  The through hole 22a opens at the upper end portion of the semicircular curved surface of the step portion 22e. The lower body main body 21a, the separate plate 21b, and the upper body 22 are each a single member, for example. The lower body main body 21a, the separate plate 21b, and the upper body 22 are made of a nonmagnetic material.

  As shown in FIG. 3, the spool valve 30 is disposed along a central axis J that extends in the axial direction Y that intersects the vertical direction Z. The spool valve 30 is cylindrical. The spool valve 30 is attached to the oil passage body 20. The spool valve 30 is disposed so as to be movable in the axial direction Y within the spool hole 23.

  The spool valve 30 moves in the axial direction Y within the spool hole body 23a, and opens and closes the opening of the oil passage 10a that opens to the inner peripheral surface of the spool hole body 23a. Although illustration is omitted, a forward force is applied to the rear end portion of the spool valve 30 from a drive device such as oil hydraulic pressure or a solenoid actuator. The spool valve 30 includes a support portion 31a, a plurality of large diameter portions 31b, and a plurality of small diameter portions 31c. Each part of the spool valve 30 has a cylindrical shape extending in the axial direction Y with the central axis J as the center.

  The support portion 31 a is the front end portion of the spool valve 30. The front end portion of the support portion 31 a supports the rear end portion of the magnet holder 80. The rear end portion of the support portion 31a is connected to the front end portion of the large diameter portion 31b.

  The plurality of large diameter portions 31b and the plurality of small diameter portions 31c are alternately and continuously disposed from the large diameter portion 31b connected to the rear end portion of the support portion 31a toward the rear side. The outer diameter of the large diameter part 31b is larger than the outer diameter of the small diameter part 31c. In the present embodiment, the outer diameter of the support portion 31a and the outer diameter of the small diameter portion 31c are, for example, the same. The outer diameter of the large diameter portion 31b is substantially the same as the inner diameter of the spool hole body 23a, and is slightly smaller than the inner diameter of the spool hole body 23a. The large diameter portion 31b is movable in the axial direction Y while sliding with respect to the inner peripheral surface of the spool hole body 23a. The large diameter portion 31b functions as a valve portion that opens and closes the opening of the oil passage 10a that opens to the inner peripheral surface of the spool hole body 23a. In the present embodiment, the spool valve 30 is, for example, a single metal member.

  The magnet holder 80 is disposed on the front side of the spool valve 30. The magnet holder 80 is disposed inside the introduction hole 23b so as to be movable in the axial direction Y. The spool valve 30 and the magnet holder 80 are allowed to rotate relative to each other around the central axis. As shown in FIG. 2, the magnet holder 80 has a holder main body portion 81 and a facing portion 82.

  The holder body 81 has a stepped columnar shape extending in the axial direction Y about the central axis J. As shown in FIG. 3, the holder main body 81 is disposed in the spool hole 23. More specifically, the holder main body 81 is disposed in the introduction hole 23b. The holder body 81 has a sliding part 81a and a supported part 81b. That is, the magnet holder 80 has the sliding part 81a and the supported part 81b.

  The outer diameter of the sliding part 81a is larger than the outer diameter of the large diameter part 31b. The outer diameter of the sliding portion 81a is substantially the same as the inner diameter of the introduction hole 23b, and is slightly smaller than the inner diameter of the introduction hole 23b. The sliding portion 81a is movable in the axial direction Y while sliding with respect to the inner peripheral surface of the spool hole 23, that is, the inner peripheral surface of the introduction hole portion 23b in this embodiment. Of the rear surface of the sliding portion 81a, the radially outer edge portion can come into contact with the step surface facing the front side of the step formed between the spool hole body 23a and the introduction hole portion 23b. Thereby, it can suppress that the magnet holder 80 moves to the back side from the position where the magnet holder 80 and a level | step difference surface contact, and the last end position of the magnet holder 80 can be determined. As will be described later, since the spool valve 30 receives a rearward force from the elastic member 70 via the magnet holder 80, the rear end position of the spool holder 30 is determined by determining the rear end position of the magnet holder 80. Can do.

  The supported portion 81b is connected to the rear end portion of the sliding portion 81a. The outer diameter of the supported part 81b is smaller than the outer diameter of the sliding part 81a and the outer diameter of the large diameter part 31b, and larger than the outer diameter of the supporting part 31a and the outer diameter of the small diameter part 31c. The supported portion 81b is movable into the spool hole body 23a. As the spool valve 30 moves in the axial direction Y, the supported portion 81b moves in the axial direction Y between the introduction hole portion 23b and the spool hole body 23a.

  The supported portion 81b has a supported recess 80b that is recessed forward from the rear end of the supported portion 81b. The support portion 31a is inserted into the supported recessed portion 80b. The front end of the support portion 31a contacts the bottom surface of the supported recessed portion 80b. Thereby, the magnet holder 80 is supported by the spool valve 30 from the rear side. The dimension in the axial direction Y of the supported part 81b is smaller than the dimension in the axial direction Y of the sliding part 81a, for example.

  As shown in FIG. 2, the facing portion 82 projects radially outward from the holder main body portion 81. More specifically, the facing portion 82 protrudes radially outward from the sliding portion 81a. In the present embodiment, a pair of opposing portions 82 are provided across the central axis J. A pair of opposing part 82 protrudes in the both sides of the left-right direction X from the outer peripheral surface of the sliding part 81a. The facing portion 82 extends in the axial direction Y from the front end portion of the sliding portion 81a to the rear end portion of the sliding portion 81a. As shown in FIG. 4, the facing portion 82 has a semicircular arc shape that is convex outward in the radial direction when viewed from the front side.

  The pair of facing portions 82 are fitted in the pair of groove portions 24. The facing portion 82 faces the inner side surface 24a of the groove portion 24 in the circumferential direction and can contact the inner side surface 24a. In addition, in this specification, “a certain two parts are opposed to each other in the circumferential direction” includes that both of the two parts are located on one virtual circle along the circumferential direction and are opposed to each other. .

  As shown in FIG. 3, the magnet holder 80 has a first recess 81c that is recessed radially inward from the outer peripheral surface of the sliding portion 81a. In FIG. 3, the first concave portion 81c is recessed downward from the upper end portion of the sliding portion 81a. The inner side surface of the first recess 81 c includes a pair of surfaces facing the axial direction Y.

  The magnet holder 80 has a second recess 80 a that is recessed from the front end of the magnet holder 80 to the rear side. The second recess 80a extends from the sliding portion 81a to the supported portion 81b. As shown in FIG. 2, the second recess 80a has a circular shape centered on the central axis J as viewed from the front side. As shown in FIG. 3, the inner diameter of the second recess 80a is larger than the inner diameter of the supported recess 80b.

  For example, the magnet holder 80 may be made of resin or metal. When the magnet holder 80 is made of resin, the magnet holder 80 can be easily manufactured. Moreover, the manufacturing cost of the magnet holder 80 can be reduced. When the magnet holder 80 is made of metal, the dimensional accuracy of the magnet holder 80 can be improved.

  As shown in FIG. 2, the magnet 50 has a substantially rectangular parallelepiped shape. The upper surface of the magnet 50 is, for example, a surface that is curved in an arc shape along the circumferential direction. As shown in FIG. 3, the magnet 50 is accommodated in the first recess 81 c and fixed to the holder main body 81. Thereby, the magnet 50 is fixed to the magnet holder 80. The magnet 50 is fixed by, for example, an adhesive. The radially outer surface of the magnet 50 is located, for example, on the radially inner side with respect to the outer peripheral surface of the sliding portion 81a. The radially outer surface of the magnet 50 faces the inner peripheral surface of the introduction hole 23b in the radial direction with a gap therebetween.

  As described above, the sliding portion 81 a provided with the first recess 81 c moves while sliding with respect to the inner peripheral surface of the spool hole 23. Therefore, the outer peripheral surface of the sliding portion 81a and the inner peripheral surface of the spool hole 23 are in contact with each other or face each other with a slight gap. Thereby, it is difficult for foreign matters such as metal pieces contained in the oil to enter the first recess 81c. Therefore, it can suppress that foreign materials, such as a metal piece contained in oil, adhere to the magnet 50 accommodated in the 1st recessed part 81c. When the magnet holder 80 is made of metal, the dimensional accuracy of the sliding portion 81a can be improved, so that foreign matters such as metal pieces contained in the oil are less likely to enter the first recess 81c.

  As shown in FIG. 2, the fixing member 71 has a plate shape whose plate surface is parallel to the left-right direction X. The fixing member 71 has an extending portion 71a and a bent portion 71b. The extending portion 71a extends in the up-down direction Z. The extending portion 71a has a rectangular shape that is long in the vertical direction Z when viewed from the front side. As shown in FIGS. 1 and 3, the extending portion 71a is inserted into the introduction hole portion 23b through the through hole 22b. The upper end portion of the extending portion 71a is inserted into the through hole 22a. The extending portion 71a closes a part of the opening on the front side of the introduction hole portion 23b. The bent portion 71b bends forward from the lower end of the extending portion 71a. The bent portion 71b is inserted into the through hole 22c. The fixing member 71 is disposed on the front side of the elastic member 70.

  In the present embodiment, before the upper body 22 and the lower body 21 are overlapped, the fixing member 71 passes through the through hole 22b and the introduction hole 23b from the opening of the through hole 22b that opens to the lower surface of the upper body 22. It is inserted up to the through hole 22a. As shown in FIG. 1, the upper body 22 and the lower body 21 are stacked and combined in the vertical direction Z so that the bent portion 71 b inserted into the through hole 22 c is formed from below by the upper surface of the lower body 21. Supported. Thereby, the fixing member 71 can be attached to the oil passage body 20.

  As shown in FIG. 3, the elastic member 70 is a coil spring extending in the axial direction Y. The elastic member 70 is disposed on the front side of the magnet holder 80. In the present embodiment, at least a part of the elastic member 70 is disposed in the second recess 80a. Therefore, at least a part of the elastic member 70 can be overlapped with the magnet holder 80 in the radial direction, and the dimension in the axial direction Y of the valve device 10 can be easily reduced. In the present embodiment, the rear portion of the elastic member 70 is disposed in the second recess 80a.

  The rear end of the elastic member 70 is in contact with the bottom surface of the second recess 80a. The front end of the elastic member 70 is in contact with the fixing member 71. Thereby, the front end of the elastic member 70 is supported by the fixing member 71. The fixing member 71 receives a front-side elastic force from the elastic member 70, and the extending portion 71a is pressed against the front inner surface of the through holes 22a and 22b.

  By supporting the front end of the elastic member 70 by the fixing member 71, the elastic member 70 applies a backward elastic force to the spool valve 30 via the magnet holder 80. Therefore, for example, the axial direction of the spool valve 30 is at a position where the force of the oil applied to the rear end of the spool valve 30 or a force applied from a drive device such as a solenoid actuator and the elastic force of the elastic member 70 are balanced. The Y position can be maintained. As a result, the position of the spool valve 30 in the axial direction Y can be changed by changing the force applied to the rear end of the spool valve 30, and the oil passage 10a inside the oil passage body 20 can be opened and closed. Can be switched.

  Also, the magnet holder 80 and the spool valve 30 are axially moved by the oil pressure applied to the rear end of the spool valve 30 or a force applied from a drive device such as a solenoid actuator and the elastic force of the elastic member 70. Y can be pressed against each other. Therefore, the magnet holder 80 moves in the axial direction Y as the spool valve 30 moves in the axial direction Y while allowing relative rotation around the central axis with respect to the spool valve 30.

  The sensor unit 40 is a device that detects the position of the spool valve 30. As described above, in the sensor unit 40 of the present embodiment, the contact portion 41b of the sensor unit 40 is positioned by being applied to the rear end surface of the upper end portion of the step portion 22e, and is fixed to the flat portion 22f. Hereinafter, the configuration of the sensor unit 40 according to the embodiment of the present invention will be described in detail.

(Configuration of sensor unit 40)
FIG. 5 is a plan view showing the configuration of the sensor unit 40 of the present embodiment. The sensor unit 40 includes a housing 41, two magnetic sensors 42 and 43 (sensor elements), a power bus bar 44, a ground bus bar 45, and sensor output terminals 46 and 47. The sensor unit 40 is connected to a power supply bus bar 44 and connected to a cable C1 for supplying power to the power terminals 42a and 43a of the magnetic sensors 42 and 43. Connected to the sensor unit 40 is a cable C2 that is electrically connected to the grounding bus bar 45 and grounds the ground terminals 42c and 43c of the magnetic sensors 42 and 43. The sensor unit 40 is connected to cables C3 and C4 that are connected to sensor output terminals 46 and 47, respectively, and output the outputs of the magnetic sensors 42 and 43 to the outside. FIG. 6 is a plan view showing a state where the cables C1 to C4 are removed from the sensor unit 40 of FIG. FIG. 7 is an enlarged view of a portion A (portion surrounded by a broken line) in FIG. In FIG. 7, the power bus bar 44 and the ground bus bar 45 are shown in gray for easy viewing of the drawing.

  The housing 41 is a rectangular parallelepiped box-shaped case that is flat in the up-down direction Z, and houses each component of the sensor unit 40 in an internal space. In addition, the housing 41 includes a fixing portion 41c that projects from the right end surface of the housing 41 in parallel to the flat surface portion 22f. The fixing portion 41c has a through hole 41d penetrating in the vertical direction Z at the approximate center of the fixing portion 41c. When the sensor unit 40 is attached to the upper body 22, the housing 41 is disposed on the flat surface portion 22f, and the contact portion 41b that is the front end surface of the housing 41 is applied to the rear end surface of the upper end portion of the step portion 22e. At this time, the through hole 41d is arranged above the screw hole (not shown) of the flat portion 22f. Therefore, by passing the fixing screw 90 through the through hole 41d and fixing the fixing screw 90 to a screw hole (not shown) of the flat portion 22f, the housing 41 is fixed to the flat portion 22f (FIG. 1). When the fixing screw 90 is rotated, stress in the rotational direction centering on the through hole 41d is applied to the sensor unit 40. However, in the present embodiment, since the contact portion 41b of the housing 41 is in contact with the rear end surface of the upper end portion of the step portion 22e, the sensor unit 40 does not rotate as the fixing screw 90 rotates. Absent. That is, the sensor unit 40 is fixed by one fixing screw 90, and the stepped portion 22 e functions as a rotation stopper for the sensor unit 40.

  As shown in FIGS. 3, 5, and 6, the magnetic sensors 42 and 43 are accommodated in sensor accommodating portions 41 aa and 41 ab formed on the bottom surface of the casing 41, respectively, and are fixed by a mold resin 49. The mold resin 49 is, for example, an epoxy resin, and fills the entire housing 41 as shown in FIG. The mold resin 49 may be partially applied so as to cover the upper side of the magnetic sensors 42 and 43. 5 to 7, the mold resin 49 is omitted for easy understanding of the drawings.

  The magnetic sensors 42 and 43 are sensor elements that detect the magnetic field of the magnet 50. The magnetic sensors 42 and 43 are, for example, Hall elements. The magnetic sensors 42 and 43 may be magnetoresistive elements. In the present embodiment, the magnetic sensors 42 and 43 are arranged above the magnet 50 in the left-right direction X (FIGS. 3 and 5). As shown in FIGS. 6 and 7, the magnetic sensor 42 has a power terminal 42a, a signal terminal 42b, and a ground terminal 42c extending from the magnetic sensor 42 toward the rear side. The magnetic sensor 43 has a power terminal 43a, a signal terminal 43b, and a ground terminal 43c extending from the magnetic sensor 43 toward the rear side.

  The power bus bar 44 is a common member that supplies power to the power terminal 42 a of the magnetic sensor 42 and the power terminal 43 a of the magnetic sensor 43. The power supply bus bar 44 is a member obtained by processing a thin plate of metal (for example, copper), and has a substantially L-shaped shape when viewed from the vertical direction Z (in plan view). The power bus bar 44 includes a first connection part 44a electrically connected to the power supply terminal 42a and a second connection part 44b electrically connected to the power supply terminal 43a. The first connection portion 44 a is a plate-like portion that rises upward from one end portion of the power bus bar 44. The second connection portion 44 b is a plate-like portion that stands upward from the other end portion of the power bus bar 44. The first connection portion 44a and the second connection portion 44b are spaced apart in the axial direction Y and also spaced apart in the left-right direction X. The first connection portion 44a has a through hole (not shown) through which the power supply terminal 42a passes, and the power supply terminal 42a is soldered to the first connection portion 44a around the through hole. The second connection portion 44b has a through hole (not shown) through which the power supply terminal 43a passes, and the power supply terminal 43a is soldered to the second connection portion 44b around the through hole. Further, the first connection portion 44a has a concave portion 44c that is recessed downward at the center of the tip portion. The core wire of the cable C1 is soldered and electrically connected to the recess 44c (FIG. 5).

  The ground bus bar 45 is a common member that grounds the ground terminal 42 c of the magnetic sensor 42 and the ground terminal 43 c of the magnetic sensor 43. The grounding bus bar 45 is a member obtained by processing a thin plate of metal (for example, copper), and has a substantially L-shaped shape when viewed from the vertical direction Z (in plan view). In the present embodiment, the grounding bus bar 45 and the power supply bus bar 44 are point-symmetric with respect to each other about a midpoint (predetermined reference point) in the horizontal direction X and the axial direction Y of the grounding bus bar 45 and the power supply bus bar 44. Arranged in a relationship. The ground bus bar 45 includes a first connection portion 45a that is electrically connected to the ground terminal 42c, and a second connection portion 45b that is electrically connected to the ground terminal 43c. The first connection portion 45 a is a plate-like portion that stands upward from one end portion of the ground bus bar 45. The second connection portion 45 b is a plate-like portion that stands up from the other end of the ground bus bar 45. The first connection part 45a and the second connection part 45b are separated in the axial direction Y and also in the left-right direction X. The first connection portion 45a has a through hole (not shown) through which the ground terminal 42c passes, and the ground terminal 42c is soldered to the first connection portion 45a around the through hole. The second connection portion 45b has a through hole (not shown) through which the ground terminal 43c passes, and the ground terminal 43c is soldered to the second connection portion 45b around the through hole. The second connection portion 45b has a concave portion 45c that is recessed downward at the center of the tip portion. The core wire of the cable C2 is soldered and electrically connected to the recess 45c (FIG. 5).

  The sensor output terminal 46 is a member that is electrically connected to the signal terminal 42 b of the magnetic sensor 42. The sensor output terminal 46 is a plate-like member made of metal (for example, copper) that rises upward from the bottom surface of the housing 41. The sensor output terminal 46 has a through hole (not shown) through which the signal terminal 42 b passes, and the signal terminal 42 b is soldered to the sensor output terminal 46 around the through hole. Further, the sensor output terminal 46 has a concave portion 46a that is recessed downward at the center of the tip portion. The core 46 of the cable C3 is soldered and electrically connected to the recess 46a (FIG. 5).

  The sensor output terminal 47 is a member that is electrically connected to the signal terminal 43 b of the magnetic sensor 43. The sensor output terminal 47 is a plate-like member made of metal (for example, copper) that rises upward from the bottom surface of the housing 41. The sensor output terminal 47 has a through hole (not shown) through which the signal terminal 43 b passes, and the signal terminal 43 b is soldered to the sensor output terminal 47 around the through hole. Further, the sensor output terminal 47 has a concave portion 47a that is recessed downward at the center of the tip portion. The core wire of the cable C4 is soldered and electrically connected to the recess 47a (FIG. 5). In the present embodiment, the sensor output terminal 46 and the sensor output terminal 47 are separated in the axial direction Y and also in the left-right direction X. Thus, since the sensor output terminal 46 and the sensor output terminal 47 are sufficiently separated in the axial direction Y and the left-right direction X, a short circuit between them is prevented and the sensor unit 40 has a compact shape.

  FIG. 8 is a circuit diagram of the sensor unit 40. As shown in FIG. 8, in the present embodiment, the common power bus bar 44 is connected to the power terminal 42 a of the magnetic sensor 42 and the power terminal 43 a of the magnetic sensor 43. The power supply cable C1 may be connected. Further, since the common ground bus bar 45 is connected to the ground terminal 42c of the magnetic sensor 42 and the ground terminal 43c of the magnetic sensor 43, the sensor unit 40 may be connected to one ground cable C2. . Thus, in the sensor unit 40 of the present embodiment, the number of cables connected to the sensor unit 40 is reduced by using the power supply bus bar 44 and the ground bus bar 45. For this reason, the sensor unit 40 has a compact shape although it is configured to include the two magnetic sensors 42 and 43.

  When the position of the magnet 50 in the axial direction Y changes as the spool valve 30 moves in the axial direction Y, the magnetic field of the magnet 50 passing through the magnetic sensors 42 and 43 changes. Therefore, the position of the magnet 50 in the axial direction Y, that is, the position of the magnet holder 80 in the axial direction Y can be detected by detecting a change in the magnetic field of the magnet 50 by the magnetic sensors 42 and 43. As described above, the magnet holder 80 moves in the axial direction Y as the spool valve 30 moves in the axial direction Y. Therefore, the position of the spool valve 30 in the axial direction Y can be detected by detecting the position of the magnet holder 80 in the axial direction Y.

  As described above, in the present embodiment, the two magnetic sensors 42 and 43 and the magnet 50 are arranged so as to overlap in the vertical direction Z. Accordingly, each of the magnetic sensors 42 and 43 outputs position information of the magnet holder 80 in the axial direction Y. The valve device 10 forms a redundant system by using the two magnetic sensors 42 and 43. That is, the valve device 10 detects the position of the spool valve 30 in the axial direction Y based on the outputs of the two magnetic sensors 42 and 43 of the sensor unit 40. When a problem occurs in one of the two magnetic sensors 42 and 43, the position in the axial direction Y of the spool valve 30 is detected using the output of the other. Thus, by using the sensor unit 40 of the present embodiment, the valve device 10 having a fail-safe structure is realized with a compact configuration.

  The above is the description of the present embodiment, but the present invention is not limited to the above configuration, and various modifications can be made within the scope of the technical idea of the present invention.

  For example, in the present embodiment, the configuration in which the magnetic field of the magnet 50 is detected by the two magnetic sensors 42 and 43 has been described. However, if the position of the spool valve 30 in the axial direction Y can be detected, the configuration is limited to the magnetic sensor. It is not something. Depending on the configuration of the spool valve 30, for example, other sensors such as an optical sensor and a piezoelectric element can be used.

  Moreover, although the sensor unit 40 of this embodiment was provided with the two magnetic sensors 42 and 43 in the housing | casing 41, it can be set as the structure provided with three or more magnetic sensors.

  In the present embodiment, the configuration in which the magnetic sensors 42 and 43 of the sensor unit 40 detect the position of the single spool valve 30 in the axial direction Y has been described. For example, two spool valves 30 are arranged in parallel. And each of the magnetic sensors 42 and 43 may be configured to detect the position of each spool valve 30 in the axial direction Y.

  In the present embodiment, the power supply bus bar 44 and the ground bus bar 45 are each substantially L-shaped in plan view, but are not limited to such a configuration. The power supply bus bar 44 and the grounding bus bar 45 need only be separated from each other at least in the axial direction Y and parallel to each other.

  Moreover, the use of the valve apparatus 10 of this embodiment is not specifically limited, You may mount other than a vehicle. Moreover, each said structure can be suitably combined in the range which does not mutually contradict.

  DESCRIPTION OF SYMBOLS 10 ... Valve apparatus, 10a ... Oil passage, 20 ... Oil passage body, 21 ... Lower body, 22 ... Upper body, 22e ... Step part, 22f ... Plane part, 23 ... Spool hole, 24 ... Groove part, 24a ... Inner side surface ( Anti-rotation part), 30 ... Spool valve, 40 ... Sensor unit, 41 ... Housing, 41b ... Contact part, 41c ... Fixed part, 41d ... Through hole, 42, 43 ... Magnetic sensor, 42a, 43a ... Power supply terminal, 42b , 43b ... signal terminal, 42c, 43c ... ground terminal, 44 ... bus bar for power supply, 44a, 45a ... first connection part, 44b, 45b ... second connection part, 44c, 45c, 46a, 47a ... concave part, 45 ... grounding Bus bar, 46, 47 ... sensor output terminal, 49 ... mold resin, 50 ... magnet, 70 ... elastic member, 71 ... fixing member, 80 ... magnet holder, 80a ... second recess, 81 ... Rudder body part, 81a ... sliding part, 81c ... first recess, 82, 181d ... opposing part, 90 ... fixing screw, 124 ... receiving hole, 160 ... anti-rotation part, J ... central axis, Y ... axial direction, Z ... Vertical direction, C1, C2, C3, C4 ... cable

Claims (9)

A sensor unit that is fixed to a spool housing that houses a spool valve and detects the position of the spool valve,
A single case with space inside,
A plurality of sensor elements arranged in the space for detecting the position of the spool valve;
A common bus bar for power supply that is disposed in the space and is electrically connected to a power supply terminal of each sensor element;
A common ground bus bar disposed in the space and electrically connected to a ground terminal of each sensor element;
A sensor unit comprising:   2. The sensor unit according to claim 1, wherein the power bus bar and the ground bus bar are spaced apart from each other in the central axis direction of the spool valve and arranged in parallel to each other.   The power bus bar and the ground bus bar are arranged in a point-symmetric relationship with respect to each other about a predetermined reference point in a plan view seen from a direction orthogonal to the central axis direction of the spool valve. The sensor unit according to claim 2.   4. The sensor unit according to claim 3, wherein the power bus bar and the ground bus bar each have a substantially L shape in a plan view as viewed from a direction orthogonal to a central axis direction of the spool valve. A sensor unit that is fixed to a spool housing that houses a spool valve and detects the position of the spool valve,
A single case with space inside,
A plurality of sensor elements arranged in the space for detecting the position of the spool valve;
A common bus bar for power supply that is disposed in the space and is electrically connected to a power supply terminal of each sensor element;
A sensor unit comprising: A sensor unit that is fixed to a spool housing that houses a spool valve and detects the position of the spool valve,
A single case with space inside,
A plurality of sensor elements arranged in the space for detecting the position of the spool valve;
A common ground bus bar disposed in the space and electrically connected to a ground terminal of each sensor element;
A sensor unit comprising: The sensor unit includes a plurality of sensor output terminals disposed in the space and electrically connected to the signal terminals of the sensor elements,
The sensor unit according to any one of claims 1 to 6, wherein the plurality of sensor output terminals are spaced apart from each other in a central axis direction of the spool valve. The sensor unit according to any one of claims 1 to 7, wherein each sensor element detects a position of a single spool valve. The spool valve includes a magnet at one end in the central axis direction,
The sensor unit according to any one of claims 1 to 8, wherein the plurality of sensor elements are magnetic sensors that detect a magnetic field of the magnet.