WO2012001441A1

WO2012001441A1 - Rotary sensor

Info

Publication number: WO2012001441A1
Application number: PCT/IB2010/001566
Authority: WO
Inventors: 晃平佐藤; 徳浩位田
Original assignee: パナソニック電工株式会社
Priority date: 2010-06-29
Filing date: 2010-06-29
Publication date: 2012-01-05

Abstract

Provided is rotary sensor the life of which can be extended. A rotor sensor (1) is provided with a housing (2) which is connected to a vehicle body (B); a rotor (3) which is mounted in such a way as to be rotatable with respect to the housing (2), and rotates with respect to the housing (2) in conjunction with the rotation of a kickstand (S) with respect to the vehicle body (B); an object to be detected (36) which is made of an electrically conductive material, and is held by the rotor (3); a coil (81) which is held by the housing (2), and the distance between which and the object to be detected (36) is changed in conjunction with the rotation of the rotor (3) with respect to the housing (2); and a detection circuit (82) which, on the basis of the impedance of the coil (81), detects the direction of the kickstand (S) with respect to the vehicle body (B). Since the coil (81) and the object to be detected (36) do not come into contact with each other, degradation due to friction, which occurs in the case of a contact point, does not take place. Therefore, it is possible to extend the life, compared to a case where a contact point is used.

Description

Technical description

The present invention relates to a rotary sensor. Background art

Conventionally, for example, as shown in FIG. 3, there is provided a rotary sensor 1 that is attached to a connecting portion between a vehicle body B and a stand S in a two-wheeled vehicle to detect the standing state of the stand S (see, for example, Patent Document 1). ). In other words, by preventing the engine from starting when the stand S is in the standing state when the vehicle is stopped, the stand S is prevented from starting in the standing state.

The example of FIG. 3 will be described in detail. The mouth sensor 1 is a housing 2 connected to the vehicle body B, and is rotatably attached to the housing 2 and is connected to the stand S so that the stand S is attached to the vehicle B. On the other hand, a rotor (not shown) that rotates relative to the housing 2 in conjunction with the stand S when rotated as indicated by an arrow A 1 is provided. The housing 2 is electrically connected to a bottomed cylindrical body portion 21 that covers a rotor (not shown) and a detection portion (not shown) whose output changes as the mouth rotates with respect to the housing 2. A wire drawing portion 22 from which the drawn wire C is drawn out, and a pinching portion 23 that sandwiches the held convex portion B 1 protruding from the vehicle body B between the wire drawing portion 22 and the wire drawing portion 22. The housing 2 is prohibited from rotating with respect to the vehicle body B by sandwiching the held projection B 1 between the wire lead-out portion 2 2 and the sandwiching portion 2 3. Thus, when the stand S rotates with respect to the vehicle body B, the rotor rotates with respect to the housing 2. The detection unit is configured to switch the output depending on whether or not the stand S is standing. In the example of FIG. 3, the stand S is provided with a protrusion S 1 protruding in the same direction as the held convex portion B 1 of the vehicle body B, and is provided on the held convex portion B 1 provided on the vehicle body B and the stand S. The projection S1 is connected via a connecting spring SP consisting of a tension coil spring, and the stand S is either in an upright state when stopped or in a retracted state when traveling by the spring force of the connecting spring SP. Maintained.

An example of this type of rotary sensor 1 is shown in FIGS. The rotary sensor 1 includes a housing 2 and a rotor 3 that is rotatably supported with respect to the housing 2. The housing 2 holds a fixed contact 41, and the rotor 3 is provided with a movable contact 3 3a that comes into contact with the fixed contact 41 when the rotor 3 rotates relative to the housing 2. That is, the fixed contact 4 1 and the movable contact 3 3 a constitute the detection unit. Below, the upper and lower sides are explained based on Fig.

The housing 2 is a bottomed cylinder in which a storage recess 20 in which a part of the rotor 3 is stored has an opening on the lower surface. A main body 21 having a shape, and a wire lead-out portion 2 2 and a sandwiching portion 23 similar to the example of FIG. On the upper surfaces of the wire lead-out portion 2 2 and the sandwiching portion 2 3, sandwich projections 2 2 a and 2 3 a that protrude upward and face each other are provided.

The inner bottom surface of the storage recess 20 is made of a metal plate whose thickness direction is directed vertically, and has an arc shape centered on the rotation axis of the rotor 3 with respect to the housing 2 and has an inner diameter and an outer diameter that are common to each other. One fixed contact 4 1 and a recirculating 2 made of a metal plate with the thickness direction facing up and down 2. It has an annular shape centering on the rotating shaft of the rotor 3 and is outside the inner diameter of the fixed contact 41. The connected terminal 51 having a small diameter is held. The wire C drawn from the wire lead-out portion 2 2 provided in the housing 2 has a plurality of core wires (not shown) corresponding to the fixed contacts 41 and the connected terminals 51 in a one-to-one relationship. These core wires are electrically connected to corresponding ones of the fixed contacts 41 and the connected terminals 51.

The rotor 3 is formed by punching and bending a metal plate, and the movable contact 3 3 holding the movable contact 3 3 a and the movable contact 3 3 a connected to the movable contact 3 3 a for storage. An inner rotor 31 accommodated in the recess 20 and an outer rotor 32 mechanically coupled to the inner rotor 31 and disposed across the inside and outside of the accommodation recess 20 are provided. Each of the inner rotor 3 1 and the outer rotor 3 2 is made of a synthetic resin such as polybutylene terephthalate (P B T).

As shown in FIGS. 4 and 5, the inner rotor 3 1 has an annular main body 3 1 a that is flat as a whole and a cylindrical shape that communicates the upper and lower sides of the main body 3 1 a. 1a has a shaft part 31b projecting from the center part on both the upper and lower sides and a cylindrical coupling part 31c projecting on the lower surface of the main body part 31a.

The movable contact 33 is disposed on the upper side of the main body 31a so as to surround the shaft 31b of the inner rotor 31 with the thickness direction directed vertically. The movable contact 3 3 has two interlocking protrusions 3 3 d protruding downward by bending up in opposite positions with the center in between, and centered on the main body 3 1 a of the inner rotor 3 1. Interlocking holes 3 1 d are vertically pierced at two locations on the opposite sides of each other, and the interlocking protrusions 3 3 d are inserted into the respective interlocking holes 3 1 d to allow movable contact. The child 3 3 rotates in conjunction with the inner rotor 3 1. Between the lower surface of the movable contact 3 3 and the main body 3 1 a of the inner rotor 3 1, three contact pressure springs 3 4, each consisting of a coil spring, are positioned approximately 1 20 ° when viewed from below. The lower end of the contact pressure spring 3 4 is housed in the spring receiver Dfl portion 3 1 e provided on the upper surface of the inner rotor 3 1 a and the upper end of the contact pressure spring 3 4 is movable contact. The movable contact 3 3 is urged upward with respect to the inner rotor 3 1 by elastically contacting the lower surface of the child 3 3. Movable contact 3 3 a is provided at one of the three locations on the upper surface of the movable contactor 3 3 that is above the contact pressure spring, and the remaining two locations are each of two connections that elastically contact the connected terminal 51. Terminal 3 3 b is provided. That is, among the fixed contacts 41, the contact of the movable contact is electrically connected to the connected terminal 51 via the movable contact 33. The contact pressure of the movable contact 3 1 to the fixed contact 4 1 and the contact pressure of the connection terminal 3 3 b to the connected terminal 5 1 are the contact pressure spring 3 respectively. Secured by 4 spring force.

The outer rotor 3 2 includes a bottomed cylindrical main body 3 2 a having an open bottom surface, a flange 3 2 b protruding outward from the lower end of the main body 3 2 a, and a peripheral edge of the flange 3 2 b. It has a U-shaped connecting portion 3 2 c that protrudes downward and is viewed from below.

The outer rotor 32 is joined to the inner rotor 31 by welding with, for example, ultrasonic waves or lasers, with the main body 3 2 a being inserted into the coupling portion 3 1 c of the inner rotor 31. In addition, the main body 3 2a of the outer rotor 3 2 has a cylindrical shape whose axial direction is directed vertically, and is held by a sleeve 3 5 force that communicates the upper and lower sides of the outer rotor 32, for example, by insert molding. ing. The sleeve 35 protrudes above the outer rotor 3 2 and covers the inner peripheral surface of the shaft portion 3 1 b of the inner rotor 3 1. The lower end surface of the sleeve 3 5 is the main body portion 3 2 of the outer rotor 3 2. It is almost flush with the inner bottom of a. Here, on the outer peripheral surface of the main body 3 2 a of the outer rotor 3 2, for example, four engaging protrusions 3 2 d are projected outwardly in a position shifted by about 90 degrees, and the inner rotor 3 Four coupling recesses (not shown) are provided on the inner peripheral surface of 1 coupling portion 3 1 c so as to be displaced by about 90 degrees each, and the engagement projections 3 2 d are engaged. By engaging with the mating recess, the rotation of the inner rotor 31 with respect to the outer rotor 32 is prohibited in the plane viewed from above and below. In addition, one set of the engaging convex portion 3 2 d and the engaging concave portion has a larger width dimension than the other, and if not a certain combination, the engaging convex portion 3 2 d is connected to the engaging concave portion. Can't be laid in. This prevents the inner rotor 3 1 from being installed in the wrong direction with respect to the outer rotor 3 2.

When attached to the vehicle body B, both ends of the connecting portion 3 2 c of the outer rotor 3 2 sandwich one end pivotally attached to the vehicle body B in the stand S, and the other end of the stand S (the end on the side in contact with the ground) ) Is located to the right in Figure 4. When the stand S rotates with respect to the vehicle body B, the inner surface of the connecting portion 3 2 c of the outer rotor 3 2 abuts on the stand S, so that the mouth 3 is connected to the housing 2 in conjunction with the stand S. As a result, the contact (contact state) between the movable contact 3 3 a and each fixed contact 4 1 is switched.

Further, in the storage H section 20, there is an annular shape between the lower surface of the main body 3 1 a of the inner rotor 3 1 and the upper surface of the flange 3 2 b of the outer rotor 3 2, and the rotor 3 and the housing 2 A first oil seal 61 is installed to prevent rainwater from entering through the gap and lubricant such as grease from flowing out. Further, the metal portion 3 1 a of the inner rotor 3 1 and the first oil seal 61 are separated from the metal in order to reduce the friction between the inner rotor 31 and the first oil seal 61. An annular sliding plate 63 is arranged.

Further, in the center of the bottom surface of the storage recess 20, a circular through hole 20 a is vertically provided. On the upper surface of the housing 2, a ring-shaped surrounding projection 21 a surrounding the through hole 20 a is projected upward. The inner diameter of the through hole 20 0 a is larger than the outer diameter of the shaft portion 3 1 b of the inner rotor 3 1. When the shaft portion 3 1 b of the inner rotor 3 1 is inserted into the through hole 20 0 a, the rotor 3 is supported against housing 2.

In addition, the sleeve 3 5 of the rotor 3 is attached to the stand S with the mouth sensor 1 The installation bolt 7 (see Fig. 1) is passed through. The mounting port 7 has a columnar shape and has a leg portion 71 having a thread on the outer peripheral surface, and a leg with respect to a pipe bolt BO (see FIG. 1) for fixing the stand S to the vehicle body B. The part 71 is mechanically connected to the stand S by screwing with the center axis aligned. The mounting bolt 7 has a dimension and shape that cannot be passed through the through hole 20 a of the housing 2, and is connected to one end of the leg portion 7 1 and is a flange surrounded by the surrounding projection 2 1 a of the housing 2. The flange portion 7 2 prevents the dropout sensor 1 from falling off from the vehicle body B and the stand S.

Further, between the inner peripheral surface of the through hole 20 a and the shaft portion 3 1 b of the inner rotor 3 1, rainwater intrusion or lubricant through the gap between the rotor 3 and the housing 2 is an annular shape. A second oil seal 62 that prevents the oil from flowing out is disposed. One end of the second oil seal 62 in the axial direction and one end on the outer side is provided with a flange 62a that protrudes outward in the radial direction. On the outer peripheral surface of the flange 6 2 a, a positioning convex portion 6 2 b is projected outward in the radial direction, and a positioning concave portion 21 c is provided on the upper surface of the housing 2. Since the portion 6 2 b is engaged with the positioning recess 21 c, the rotation of the second oil seal 62 with respect to the housing 2 in the plane viewed from the up and down direction is prohibited. The surrounding projection 21a is provided with a notch 21d that communicates with the positioning recess 21c. The flange portion 6 2 a of the second oil seal 62 is sandwiched between the lower surface of the flange portion 7 2 of the mounting port 7 passed through the sleeve 35 and the upper surface of the housing 2.

Further, on the inner bottom surface of the storage recess 20, a cylindrical tube protrusion 21 b surrounding the through hole 20 a is provided so as to protrude downward. The connected terminal 5 1 and each fixed contact 4 1 are each held in the housing 2 by insert molding, and the connected terminal 5 1 has an inner peripheral edge entering the cylindrical protrusion 2 1 b. Each of the radially outer ends enters the inner peripheral surface of the storage recess 20.

[Patent Document 1] Japanese Patent Laid-Open No. 2 0 0 4-2 3 1 0 94

When the fixed contact 4 1 and the movable contact 3 3 a are used as the detection unit as described above, the fixed contact 4 1 and the movable contact 3 3 a are worn due to wear on the fixed contact 4 1 and the movable contact 3 3 a. The service life of the rotary sensor 1 is shortened until contact failure with a or a short circuit occurs.

The present invention has been made in view of the above-described reasons, and an object thereof is to provide a mouth sensor capable of extending the life.

The invention of claim 1 is a rotary sensor used for detecting the orientation of a stand relative to the body of a motorcycle, and a housing connected to the body, and attached to the housing so as to be rotatable. A rotor that rotates with respect to the housing, a detection object held by one of the re-housing and the rotor made of a conductive material, and a detection object that is held by the other of the housing and the rotor and that rotates with the rotation of the rotor relative to the housing. A coil for changing the distance between the body and a detection circuit for detecting the orientation of the stand relative to the body based on the impedance of the coil is provided. According to the present invention, since the coil and the detected object do not need to be brought into contact with each other, deterioration due to wear such as the contact point can be avoided, so that the life can be extended compared to the case where the contact point is used. Become.

The invention of claim 2 is the invention of claim 1, wherein the rotor has an outer rotor that contacts and interlocks with the stand, and an inner rotor that is fixed to the outer rotor while the detected body is fixed. The housing is fixed to the body in such a manner that the inner rotor is sandwiched between the body to which the coil is fixed and the rotation axis of the rotor with respect to the housing. A cover sandwiched between an inner rotor and an outer rotor in a direction along the rotation axis of the rotor with respect to the housing, and the body and the cover each have an annular shape surrounding the inner rotor, The outer peripheral surface of the inner rotor is in contact with the inner peripheral surface of the body and the inner peripheral surface of the cover. And features.

According to the present invention, compared to the case where the outer peripheral surface of the inner rotor is brought into contact with only one of the inner peripheral surface of the body and the inner peripheral surface of the cover, the rattling of the rotor with respect to the housing is suppressed, and the housing The amount of wear is reduced by increasing the contact area between the rotor and the rotor and dispersing the pressure.

The invention of claim 3 is the invention of claim 1 or claim 2, wherein the rotor is in contact with the stand and interlocks with the stand, and the detected object is fixed and the rotor is fixed. The inner rotor fixed to the housing, and the housing sandwiches the inner rotor between the body and the body in a direction along a rotation axis of the rotor with respect to the housing. And the force / one sandwiched between the inner rotor and the outer rotor in a direction along a rotation axis of the rotor with respect to the housing. The force / \-is a direction along the rotation axis of the rotor with respect to the housing, and the inner Characterized in that it abuts against the data.

The invention according to claim 4 is the invention according to claim 2, wherein the body and the cover are in contact with the inner rotor from opposite directions to each other in a direction along a rotation axis of the rotor with respect to the housing. i.

According to the present invention, rattling of the rotor with respect to the housing can be suppressed as compared with a case where only one of the body and the cover is brought into contact with the inner rotor.

Brief Description of Drawings

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the same.

FIG. 3 is a perspective view showing a use state of a rotary sensor.

FIG. 4 is a cross-sectional view showing a conventional example.

FIG. 5 is an exploded perspective view showing the above. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIG. 1 and FIG.

Since the basic configuration of this embodiment is common to the conventional example described in FIGS. 3 to 5 (hereinafter simply referred to as “conventional example”), common parts are denoted by the same reference numerals and illustrated and described. Omitted. The vertical direction is based on Figure 2.

In this embodiment, the sleeve 35 is not provided, and the leg portion 7 1 of the mounting port 7 is directly passed through the shaft portion 3 1 b of the inner rotor 3 1. The lower end portion of the shaft portion 3 1 b of the inner rotor 3 1 protrudes below the main body portion 3 1 a, and the bottom portion of the main body portion 3 2 a of the outer rotor 3 2 has a shaft portion 3 1 b of the inner rotor 3 1. The insertion hole 3 2 e into which the lower end of the is inserted extends vertically.

In addition, the housing 2 of the present embodiment includes a body 2 a having the same shape as the housing 2 of the conventional example, and a cover 2 b that is an annular shape and is located below the first oil seal 61. Prepare. That is, the main body 3 1 a of the inner rotor 3 1 is sandwiched between the body 2 a and the cover 2 b in the vertical direction, which is the direction along the rotation axis of the rotor 3 with respect to the housing 2. More specifically, the cover 2b is formed of a flat annular body portion 2 4 whose thickness direction is in the vertical direction, and a cylindrical shape coaxial with the body portion 2 4 from the upper surface of the body portion 24. And a cylindrical portion 25 projecting upward and surrounding the first oil seal 61. The outer diameter of the body portion 2 4 of the cover 2 b is approximately the same as the outer diameter of the body portion 21 of the body 2 a, and the outer diameter of the cylindrical portion 25 of the cover 2 b is that of the body 2 a. The cover 2b is, for example, an outer peripheral surface of the cylindrical portion 25, and an upper surface of a portion protruding outward from the cylindrical portion 25 in the main body portion 24. At, it is fixed to the body 2a by laser welding.

Here, the inner diameter of the body 2 a (that is, the inner diameter of the housing recess 20) is slightly larger than the outer diameter of the main body 3 1 a of the inner rotor 3 1, and the inner diameter of the main body 2 4 of the cover 2 b is the inner rotor. It is slightly larger than the outer diameter of the 3 1 coupling portion 3 1 c. That is, the inner peripheral surface of the housing recess 20 of the body 2 a contacts the outer peripheral surface of the main body 31 a of the inner rotor 31 and the inner peripheral surface of the main body 24 of the cover 2 b is the inner rotor 31. It contacts the outer peripheral surface of the coupling part 3 1 c. As a result, the rattling of the rotor 3 with respect to the housing 2 can be suppressed compared with the case where only one of the body 2 a and the cover 2 b is brought into contact with the outer peripheral surface of the inner rotor 3 1. The amount of wear is reduced by increasing the contact area with the rotor 3 and dispersing the pressure. Furthermore, in the present embodiment, the upper end of the cylindrical portion 25 of the cover 2 b abuts on the lower surface of the main body portion 3 1 a of the inner rotor 3 1, and the upper surface of the main body portion 3 1 a of the inner rotor 3 1 The ratchet of the rotor 3 against the uging 2 is also suppressed by the contact of the lower end of the cylindrical cylindrical projection 21 b that is provided on the inner bottom surface of the storage recess 20 and surrounds the through hole 20 a. It has been. In addition, instead of the fixed contact 4 1 and the connected terminal 5 1, the body 2 a has an annular printed wiring board 80 that surrounds the cylindrical protrusion 2 1 b with the thickness direction facing up and down. Fixed in storage recess 20 Has been. On the lower surface of the printed circuit board 80, the direction of the stand S is detected based on the impedance of the coil 8 1 and the recoil 8 1 made of an integrated circuit of one chip, and an output corresponding to the detected direction is generated to generate an electric wire. A detection circuit 82 that outputs to the outside via C is mounted. Since the detection circuit 82 as described above can be realized by a well-known technique, detailed illustration and description thereof will be omitted.

Further, the rotor 3 includes a detection object 36 made of a conductive material such as metal, for example, instead of the movable contact 33 and the contact pressure spring 34. The body to be detected 36 is held on the main body 31a of the inner rotor 31 by, for example, insert molding. Here, the detected object 3 6 is positioned below the coil 8 1 when the stand S is in one of the standing state and the retracted state, and the coil 8 when the stand S is the other of the standing state and the retracted state. The size and shape are such that they are not located below 1 but are separated from the coil 8 1. That is, the detected object 3 6 and the coil 8 1 are not in contact with each other, and when the stand S rotates with respect to the vehicle body, the coil 8 1 and the detected object 3 6 As the distance changes, the impedance of the coil 8 1 changes. Based on this change in impedance, the detection circuit 8 2 detects the direction of the stand S (standing state or retracted state).

At the time of manufacture, the printed wiring board 80 is fixed to the body 2a by, for example, heat welding, and the first oil seal 61, the sliding plate 63, and the inner rotor 31 are assembled to the cover 2b. The cover 2 b is fixed to the body 2 a by laser welding, for example, and then the second oil seal 6 2 is fitted between the body 2 a and the inner rotor 3 1 and the inner rotor 3 1 The outer rotor 32 is fixed by, for example, laser welding.

According to the above configuration, the coil 8 1 and the detected object 3 6 do not come into contact with each other, so that deterioration due to wear as in the fixed contact 4 1 and the movable contact 3 3 a in the conventional example does not occur. It is possible to extend the service life compared to.

While the present invention has been described above with reference to specific embodiments, various changes, modifications, and modifications within the spirit of the present invention and the scope of the appended claims may be included in the technical field. The description and drawings should not be construed as limiting the technical idea of the present invention but should be construed as illustrative of the present invention.

Claims

The scope of the claims

[Claim 1]

A rotary sensor used to detect the orientation of a stand relative to the body of a motorcycle, a housing connected to the body;

A rotor that is rotatably attached to the housing and that rotates relative to the housing as the stand rotates relative to the vehicle body;

A detected object made of a conductive material and held by one of the housing and the rotor;

A coil that is held by the other of the housing and the rotor and changes a distance between the object to be detected as the rotor rotates relative to the housing;

A mouthpiece sensor, comprising: a detection circuit that detects a direction of a stand relative to a vehicle body based on impedance of a coil.

[Claim 2]

The rotor includes an outer rotor that contacts and interlocks with the stand, and an inner rotor to which the detection target is fixed and fixed to the outer rotor,

The housing is fixed to the body in such a manner that the inner rotor is sandwiched between the body to which the coil is fixed and the rotation axis of the mouth relative to the housing between the body and the body. A cover sandwiched between an inner rotor and a counter mouth in a direction along the rotation axis of the rotor with respect to the housing, and the body and the cover each have an annular shape surrounding the inner rotor. 2. The rotary sensor according to claim 1, wherein an outer peripheral surface of the inner rotor is in contact with an inner peripheral surface of the body and an inner peripheral surface of the cover.

[Claim 3]

The rotor includes an outer rotor that contacts and interlocks with the stand, and an inner rotor that is fixed to the outer rotor while the detected body is fixed to the rotor.

The housing is fixed to the body in such a manner that the inner rotor is sandwiched between the body to which the coil is fixed and the rotation axis of the rotor relative to the housing between the body and the body. The force / \ *-sandwiched between the inner rotor and the outer rotor in a direction along the rotation axis of the rotor with respect to the housing, and the body and the cover are 2. The rotary sensor according to claim 1, wherein the rotary sensor is in contact with the inner rotor in a direction along a rotation axis of the rotor and in opposite directions.

[Claim 4]

The rotary sensor according to claim 2, wherein the body and the cover are in contact with the inner rotor from opposite directions to each other in a direction along a rotation axis of the rotor with respect to the housing.