WO2014103499A1 - 車輪速センサ及びワイヤハーネス - Google Patents
車輪速センサ及びワイヤハーネス Download PDFInfo
- Publication number
- WO2014103499A1 WO2014103499A1 PCT/JP2013/079209 JP2013079209W WO2014103499A1 WO 2014103499 A1 WO2014103499 A1 WO 2014103499A1 JP 2013079209 W JP2013079209 W JP 2013079209W WO 2014103499 A1 WO2014103499 A1 WO 2014103499A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wheel speed
- speed sensor
- waterproof member
- synthetic resin
- electric wire
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
- G01P1/026—Housings for speed measuring devices, e.g. pulse generator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
Definitions
- the present invention relates to a wheel speed sensor that detects a wheel speed of a vehicle by detecting a magnetic field variable, and a wire harness having the wheel speed sensor.
- a vehicle has been equipped with a wheel speed sensor for vehicle control such as ABS (Anti-lock Brake System).
- the wheel speed sensor is provided to face the rotor that rotates together with the wheel, detects a magnetic flux variable due to the rotation of the rotor, and outputs an electrical signal corresponding to the detection result.
- a magnetoelectric transducer for example, a sensor component such as a Hall IC (Integrated Circuit) that converts a magnetic flux variable into an electric signal is used.
- Patent Document 1 proposes a wheel speed sensor that prevents the exposed portion of the resin coating of the Hall IC from being damaged by collision and adhesion of solid matter such as iron powder.
- the wheel speed sensor described in Patent Document 1 prevents damage to the resin coating by adopting a configuration in which a metal cover is fitted and fixed to the resin coating of the Hall IC.
- the wheel speed sensor is connected to a control device or the like via a wire harness arranged in the vehicle.
- a wheel speed sensor using a Hall IC needs to be connected to a control device or the like with two signal lines, and these two signal lines are bundled and covered with a synthetic resin to form a single wire harness.
- This wire harness has its synthetic resin coating removed at one end, and the two exposed signal lines are connected to the two metal terminals of the Hall IC.
- the Hall IC to which the two signal lines are connected is sealed with a synthetic resin, and this synthetic resin becomes the exterior of the wheel speed sensor.
- resin sealing a part of the synthetic resin of the wire harness that covers the two signal lines is embedded in the synthetic resin that forms the exterior of the wheel speed sensor.
- both synthetic resins are fused, so that moisture and the like are prevented from entering the inside from the portion where the wire harness extends from the wheel speed sensor to the outside.
- each signal line in the wire harness is also individually coated with a synthetic resin, and a material with low fusibility is used for this coating.
- a heat shrinkable tube is generally used as a member for bundling and covering the branched electric wires.
- moisture or the like enters the heat shrinkable tube through the electric wire.
- the present invention has been made in view of such circumstances, and the object of the present invention is to embed a synthetic resin of a wire harness that covers a plurality of electric wires, even if it cannot be embedded.
- An object of the present invention is to provide a wheel speed sensor capable of preventing intrusion of moisture and the like, and a wire harness in which a plurality of electric wires including electric wires connected to the wheel speed sensor are bundled.
- an object of the present invention is to prevent moisture and the like from entering the electric wire when the electric wires included in the wire harness are branched and connected to the plural electronic parts including the Hall IC.
- the object is to provide a wire harness in which a plurality of electric wires including a wheel speed sensor and electric wires connected to the wheel speed sensor are bundled.
- the wheel speed sensor includes a magnetoelectric transducer and a sensor component having a terminal provided on the magnetoelectric transducer, an electric wire connected to the terminal, and a part of the sensor component and the electric wire made of synthetic resin.
- a wheel speed sensor that includes a resin molded portion that is sealed and detects a magnetic field change caused by rotation of a rotor interlocked with a wheel, converts the magnetic field into an electric signal, and outputs the electric signal from the terminal.
- a through-hole to be inserted is formed, and a waterproof member configured to prevent passage of moisture in the through-hole when the electric wire is inserted, and fixing for fixing the waterproof member to the resin molded portion Means.
- the wheel speed sensor according to the present invention is characterized in that the fixing means fixes the waterproof member by fitting a hole formed in the waterproof member and a part of the resin molded portion.
- the waterproof member is an elastic member, and a protrusion is provided in the hole.
- the wheel speed sensor according to the present invention further includes a cylindrical covering member that covers the outer peripheral surface of the waterproof member.
- the wheel speed sensor according to the present invention is characterized in that a protrusion is provided on the outer peripheral surface of the waterproof member.
- the fixing means seals part or all of the waterproof member together with the sensor component and part of the electric wire with synthetic resin at the resin molding portion.
- the waterproof member is fixed.
- the wheel speed sensor combines a magnetoelectric transducer and a sensor component having a terminal provided on the magnetoelectric transducer, an electric wire connected to the terminal, the sensor component and a part of the electric wire.
- a wheel speed sensor that includes a resin molded part sealed with resin, detects a magnetic field change due to rotation of a rotor interlocked with a wheel, converts the magnetic field into an electrical signal, and outputs the electrical signal from the terminal; It further includes a cylindrical waterproof member into which an electric wire is inserted, and the resin molding part is sealed with a synthetic resin together with the sensor component and a part of the electric wire, with a part or all of the waterproof member.
- the wheel speed sensor according to the present invention further includes a cylindrical covering member that covers an outer peripheral surface of the waterproof member, and the resin molded portion includes a part or all of the covering member in the sensor component and the electric wire. A part and the waterproof member are sealed together with a synthetic resin.
- the waterproof member has a concave portion or a convex portion formed on an outer peripheral surface
- the covering member includes a convex portion or a concave portion that engages with the concave portion or the convex portion of the waterproof member. It is formed in the surrounding surface, The movement of the said waterproof member and the said covering member to the axial direction is latched by engagement of a recessed part and a convex part, It is characterized by the above-mentioned.
- the wheel speed sensor according to the present invention is characterized in that the covering member is a material fused to the synthetic resin of the resin molded portion.
- the wheel speed sensor according to the present invention is characterized in that the waterproof member is a material fused to the synthetic resin of the resin molded portion.
- the wire harness according to the present invention is characterized in that a plurality of electric wires including the electric wires of the wheel speed sensor described above are covered with a synthetic resin to be one.
- a waterproof member formed with a through hole into which an electric wire connected to a metal terminal of a sensor component is inserted is used, and the waterproof member is formed on a resin molded portion in which a part of the sensor component and the electric wire is sealed with a synthetic resin.
- the waterproof member is a member that can prevent moisture from entering through the through hole in which the electric wire is inserted.
- the waterproof member is fixed by fitting the hole formed in the waterproof member and the resin molded portion. As a result, the waterproof member can be easily fixed.
- the waterproof member is an elastic member, and a protrusion is provided in the hole of the waterproof member.
- the protrusion in the hole can be brought into close contact with the resin molded part fitted in the hole of the waterproof member, so that moisture or the like can be prevented from entering from the hole, and the waterproof member can be more It is possible to reliably fix the resin molded portion.
- the outer peripheral surface of the waterproof member is covered with a cylindrical covering member.
- the covering member can further prevent intrusion of moisture and the like.
- the waterproof member is an elastic member, and a protrusion is formed on the outer peripheral surface of the waterproof member.
- the protrusion part of an outer peripheral surface can be closely_contact
- a cylindrical waterproof member into which an electric wire connected to the metal terminal of the sensor component is inserted is provided, and the waterproof member is sealed with a synthetic resin together with the sensor component.
- the waterproof member can prevent with a waterproof member that a water
- coated member which covers the outer peripheral surface of a waterproof member is further provided, and a coating
- the covering member can be made of a material that can be easily fused with the synthetic resin, and the waterproof member can be fixed to the resin molded portion.
- a concave portion or a convex portion is formed on the outer peripheral surface of the waterproof member
- a convex portion or a concave portion is formed on the inner peripheral surface of the covering member
- the waterproof member moves in the axial direction by the engagement of the concave portion and the convex portion. It is good also as a structure which a coating
- the waterproof member is made of a material that can be easily fused with the synthetic resin of the resin molded portion. Therefore, even if it is a case where the covering member which covers a waterproof member is not provided, a waterproof member can be fixed to a resin fabrication part.
- a plurality of electric wires including the electric wires of the wheel speed sensor are covered with synthetic resin to form one wire harness. Since the wheel speed sensor described above has a waterproof structure that does not use fusion of the wire harness with the synthetic resin, it is possible to bundle the electric wires of the wheel speed sensor and other electric wires to form one wire harness. is there.
- the cylindrical waterproof member into which the electric wire connected to the sensor component is inserted is sealed with the synthetic resin together with the sensor component, so that moisture or the like enters the resin molded portion. It can be prevented by a waterproof member. Therefore, it is not necessary to embed the synthetic resin of the wire harness in the resin molding portion, and the electric wire connected to the sensor component and other electric wires can be bundled to form one wire harness.
- a wire harness can realize cost reduction by reducing the number of parts and the number of processes in the vehicle manufacturing process.
- the waterproof member into which the electric wire connected to the sensor component is inserted is fixed to the resin molded portion to prevent moisture from entering into the plurality of wire harnesses.
- the wires are branched and connected, it is possible to prevent moisture from entering through the wires.
- FIG. 1 It is a schematic diagram for demonstrating the structure of the wire harness which has a wheel speed sensor which concerns on this Embodiment. It is a perspective view which shows the external appearance of a wheel speed sensor. It is a side view which shows the external appearance of a wheel speed sensor. It is a sectional side view which shows the internal structure of a wheel speed sensor. It is a schematic diagram which shows the structure of Hall IC. It is a perspective view which shows the external appearance of the wheel speed sensor before shaping
- FIG. 6 is an exploded perspective view of a wheel speed sensor according to Embodiment 3.
- FIG. 6 is an exploded perspective view of a wheel speed sensor according to Embodiment 3.
- FIG. 6 is a cross-sectional view showing an internal configuration of a wheel speed sensor according to a third embodiment.
- FIG. 1 is a schematic diagram for explaining a configuration of a wire harness having a wheel speed sensor according to the present embodiment.
- a wheel speed sensor 1 is connected to one end of the illustrated wire harness 7.
- the wheel speed sensor 1 is fixedly fixed at an appropriate position of the vehicle so as to face the rotor 9 that rotates integrally with the vehicle wheel (not shown).
- the wheel speed sensor 1 has a rod-like shape such as a round bar or a square bar, and a Hall IC 20 (see FIGS. 4 to 6) is embedded in one end thereof, and two electric wires 7a extend from the opposite end side. Yes.
- the wire harness 7 is formed as a single wire by bundling two electric wires 7a having one end connected to the wheel speed sensor 1 and a plurality of other electric wires 7b and performing resin coating or the like.
- the other electric wires 7b are connected to other electronic components arranged in the vicinity of the wheel speed sensor 1.
- a control device for an electric parking brake may be connected to the electric wire 7b.
- the resin coating is removed and the electric wires 7a and 7b are exposed.
- the wheel speed sensor 1 and other electronic components are connected to one end of the exposed electric wires 7a and 7b, and the connector 8 is connected to the other end.
- the connector 8 is for connecting to a control device or the like mounted on the vehicle.
- the rotor 9 is actually in the shape of a ring or a disk.
- the rotor 9 is magnetized so that N poles and S poles are alternately continued in the circumferential direction.
- the wheel speed sensor 1 detects a magnetic flux variation associated with this change, and outputs a signal corresponding to the detected magnetic flux to a vehicle control device connected via the wire harness 7.
- the vehicle control device can calculate the wheel speed of the vehicle according to the output signal from the wheel speed sensor 1 and can use it for the control of ABS or the like.
- FIG. 2 is a perspective view showing the external appearance of the wheel speed sensor 1.
- FIG. 3 is a side view showing the appearance of the wheel speed sensor 1.
- FIG. 4 is a side sectional view showing the internal configuration of the wheel speed sensor 1.
- the wheel speed sensor 1 includes an exterior part 10 that is integrally molded of synthetic resin.
- the exterior portion 10 includes a tip portion 11 having a substantially rectangular parallelepiped shape with chamfered corner portions, a first column portion 12 having a substantially cylindrical shape, and a second column having a substantially cylindrical shape having a diameter larger than that of the first column portion 12. It has a portion 13.
- the exterior portion 10 has an aspect in which the tip portion 11, the first cylindrical portion 12, and the second cylindrical portion 13 are connected in this order.
- the front end portion 11 side of the wheel speed sensor 1 is referred to as a front side
- the second cylindrical portion 13 side is referred to as a rear side
- a flange 14 is provided at the rear end of the outer peripheral surface of the second cylindrical portion 13. The wheel speed sensor 1 is fixed to the vehicle such that the tip portion 11 faces the rotor 9.
- the first cylindrical portion 12 of the exterior portion 10 is provided with a fixing member 15 for fixing the wheel speed sensor 1 to the vehicle.
- the fixing member 15 is a substantially oval plate body, and a substantially circular through hole 16 is formed on one side in the longitudinal direction.
- the fixing member 15 is fixed to the exterior part 10 in a mode in which a similar through hole is formed on the other side in the longitudinal direction and the first cylindrical portion 12 is inserted.
- the fixing member 15 may be manufactured as a separate part and fixed to the exterior part 10, or may be integrally molded with the exterior part 10.
- the wheel speed sensor 1 is fixed to an appropriate position of the vehicle through a through hole 16 of the fixing member 15 by a method such as screwing.
- a Hall IC 20 held by a synthetic resin holder 30 is embedded in the distal end portion 11 and the first cylindrical portion 12 of the exterior portion 10. Further, inside the second cylindrical portion 13 of the exterior portion 10, two electric wires 7 a connected to the Hall IC 20, a waterproof member 40 attached to the electric wire 7 a, and a covering member 50 that covers the waterproof member 40, Is buried. The waterproof member 40 and the covering member 50 are embedded so that a part thereof is exposed from the rear end surface of the exterior part 10.
- FIG. 5 is a schematic diagram showing the configuration of the Hall IC 20.
- the Hall IC 20 includes a magnetoelectric transducer 21 having a polyhedral exterior, two plate-like metal terminals 22 projecting from one surface of the exterior of the magnetoelectric transducer 21, and And a capacitor 23 connected to the two metal terminals 22.
- the magnetoelectric transducer 21 is an element that converts a change in a magnetic field into an electric signal and outputs it from a metal terminal 22.
- the two metal terminals 22 both have a rectangular plate shape, and protrude substantially parallel from one surface of the magnetoelectric transducer 21 so that the one side faces each other.
- the capacitor 23 has a substantially rectangular parallelepiped exterior and is provided across one planar side of the two metal terminals 22.
- the metal terminal 22 is bent in the manufacturing process of the wheel speed sensor 1, and the Hall IC 20 is housed and held in the holder 30.
- the Hall IC 20 is bent at a substantially right angle at the base portion of the metal terminal 22 protruding from the magnetoelectric transducer 21, and between this bent position and the position where the capacitor 23 is provided. It is bent in an oblique direction. The bending of these two places is performed toward the side opposite to the one plane side where the capacitor 23 of the metal terminal 22 is provided.
- FIG. 6 is a perspective view showing the appearance of the wheel speed sensor 1 before molding the exterior part 10.
- the holder 30 is a member that holds the Hall IC 20 while maintaining the bent state shown in the lower part of FIG.
- the holder 30 is formed of synthetic resin or the like, and is composed of two parts, a base portion 31 and a lid portion 32.
- the Hall IC 20 that is bent is accommodated in the base portion 31 and the lid portion 32 is mounted, whereby the Hall IC 20 is held by the holder 30.
- the base portion 31 and the lid portion 32 are fixed by claw-shaped engagement or the like (may be fixed by a method such as adhesion or welding).
- the holder 30 is provided with irregularities for positioning with respect to a mold or the like when the exterior portion 10 of the wheel speed sensor 1 is molded, and also plays a role of positioning the Hall IC 20.
- the holder 30 is configured such that the tip of the metal terminal 22 of the Hall IC 20 is exposed while the Hall IC 20 is held.
- the electric wires 7a are connected to the two metal terminals 22 of the Hall IC 20 by soldering or the like.
- the two electric wires 7a are each formed by coating a metal wire with a synthetic resin, and the coating of the synthetic resin at the tip is removed and soldered to the metal terminal 22 of the Hall IC 20. Prior to connection to the Hall IC 20, the waterproof member 40 and the covering member 50 are attached to the two electric wires 7a.
- the waterproof member 40 has a substantially cylindrical shape, and two through holes are formed substantially parallel to the axial direction.
- the two through holes of the waterproof member 40 are for inserting the electric wires 7a, respectively.
- a groove portion 41 is formed over the entire circumference at a position in front of the center in the axial direction.
- two protrusions 42 are provided on the outer peripheral surface of the waterproof member 40 on the rear side from the position where the groove 41 is formed.
- two protrusions 43 are provided at appropriate positions on the inner peripheral surface of the two through holes of the waterproof member 40.
- the protrusions 42 on the outer peripheral surface of the waterproof member 40 are intended to prevent moisture and the like from entering through the gap between the waterproof member 40 and the cover member 50 by increasing the degree of close contact with the inner peripheral surface of the cover member 50. It is.
- the protrusion 43 on the inner peripheral surface of the waterproof member is for preventing moisture and the like from entering from the gap between the waterproof member 40 and the electric wire 7a by increasing the degree of close contact with the electric wire 7a.
- the covering member 50 has a substantially cylindrical shape, and the waterproof member 40 is inserted therein to cover the outer peripheral surface of the waterproof member 40.
- the covering member 50 is formed with a notch 51 having a form in which a part of the front end thereof is notched.
- a protruding portion 52 protrudes inward on the inner peripheral surface of the front end of the covering member 50.
- the protruding portion 52 engages with the groove portion 41 of the waterproof member 40 when the waterproof member 40 is inserted into the covering member 50.
- the waterproof member 40 is prevented from moving to the rear side in the axial direction during resin molding of the exterior portion 10 or the like.
- the notch 51 in the covering member 50 it is easy to insert the waterproof member 40 into the covering member 50 provided with the protruding portion 52.
- a collar portion 53 is provided over the entire circumference.
- the flange portion 53 is for positioning and fixing the covering member 50 and the waterproof member 40 with respect to a mold or the like when the exterior portion 10 is resin-molded. For this reason, the waterproof member 40 and the covering member 50 are partially exposed from the rear surface of the exterior portion 10.
- an anti-slip portion 54 in which a plurality of protrusions extending around one circumference are arranged in parallel is provided at the approximate center in the axial direction.
- the anti-slip part 54 is embedded in the exterior part 10 and engages with a synthetic resin constituting the exterior part 10 to prevent the covering member 50 and the waterproof member 40 from falling off the exterior part 10.
- the wheel speed sensor 1 includes a cover member 60 attached to the rear side of the exterior portion 10.
- the cover member 60 has a substantially cylindrical shape whose diameter decreases from the front side to the rear side, and is formed of an elastic material.
- a locking portion 61 is provided over the entire circumference in a state where the end portion is bent inward.
- the cover member 60 is provided at the rear end of the exterior part 10 so as to cover the waterproof member 40 and the covering member 50 exposed on the rear surface of the exterior part 10 through which the electric wire 7b is inserted, and further cover the rear part of the exterior part 10. It is mounted by engaging the locking part 61 with the collar part 14. By attaching the cover member 60, it is possible to mitigate external impacts on the waterproof member 40, the covering member 50, and the like exposed from the exterior portion 10, and to prevent entry of moisture and the like.
- the exterior portion 10 of the wheel speed sensor 1 is formed of synthetic resin such as nylon, for example.
- the holder 30 is molded from a synthetic resin such as nylon.
- the waterproof member 40 is formed using, for example, silicon.
- the covering member 50 is formed using, for example, nylon.
- the cover member 60 is formed using, for example, rubber.
- polyethylene is used as the synthetic resin that covers the metal wire of the electric wire 7b.
- the material of the exterior portion 10 of the wheel speed sensor 1 and the synthetic resin that covers the waterproof member 40 and the metal wire of the electric wire 7 b may be materials that are not fused by heating in the molding process of the exterior portion 10.
- the material of the exterior portion 10 of the wheel speed sensor 1 and the material of the covering member 50 are preferably materials that are fused by heating (may be fused by a method other than heating). .
- the wheel speed sensor 1 having the above configuration is configured such that the waterproof member 40 attached to the electric wire 7a connected to the Hall IC 20 is embedded when the exterior portion 10 is molded, so that moisture or the like enters the exterior portion 10. Can be prevented.
- the wheel speed sensor 1 includes a covering member 50 that covers the waterproof member 40, and the covering member 50 is embedded in the exterior portion 10 together with the waterproof member 40. Thereby, even if the waterproof member 40 is a material that is difficult to fuse with the exterior part 10, the covering member 50 can be made a material that can be easily fused with the exterior part 10, and the waterproof member 40 is fixed in the exterior part 10. can do.
- the waterproof member 40 moves in the axial direction in a process such as a resin floor of the exterior portion 10. This can be prevented by the engagement of the groove 41 and the protrusion 52.
- the wheel speed sensor 1 By adopting the wheel speed sensor 1 having such a configuration, it is possible to prevent moisture and the like from entering the interior by the waterproof member 40, and therefore synthetic resin that covers the wire harness 7 is applied to the exterior portion 10 of the wheel speed sensor 1. There is no need to make it waterproof. Therefore, the electric wire 7a of the wheel speed sensor 1 and the electric wire 7b other than this can be bundled to form one wire harness 7.
- the material of each member constituting the wheel speed sensor 1 is exemplified, but materials other than these may be used.
- a material such as PBT Poly-Butylene-Terephtalate
- a material such as PBT can be used for the holder 30.
- a material such as NBR (Nitrile Butadiene Rubber, nitrile butadiene rubber) can be used for the waterproof member 40.
- the covering member 50 can be made of a material such as PBT.
- the cover member 60 can be made of a material such as urethane.
- the Hall IC 20 is not limited to the exemplified one, and various other types can be adopted.
- the waterproof member 40 and the covering member 50 are configured such that a part of the rear side is exposed to the outside of the exterior part 10, but is not limited thereto.
- One or both of the waterproof member 40 and the covering member 50 may be configured to be entirely embedded in the exterior part 10.
- the waterproof member 40 is provided with a groove (concave portion) 41
- the covering member 50 is provided with a protruding portion (convex portion) 52, and the movement of the waterproof member 40 is locked by the engagement of the groove portion 41 and the protruding portion 52.
- the wheel speed sensor 1 may be configured without the cover member 60.
- the shape of each member of the wheel speed sensor 1 described in the drawings is an example, and is not limited thereto.
- FIG. 7 is a side sectional view showing the internal configuration of the wheel speed sensor 201 according to the second embodiment.
- the wheel speed sensor 201 according to the second embodiment does not include the covering member 50.
- the wheel speed sensor 201 according to the second embodiment includes a waterproof member 240 formed of a material that is fused to the exterior portion 10.
- the waterproof member 240 has a substantially cylindrical shape, and two through holes for inserting the two electric wires 7a are formed substantially parallel to the axial direction.
- a flange portion 241 is provided over the entire circumference.
- the flange portion 241 is for positioning and fixing the waterproof member 240 with respect to a mold or the like when resin molding of the exterior portion 10 is performed.
- two protrusions 43 are provided at appropriate positions on the inner peripheral surface of the two through holes of the waterproof member 240.
- the protrusion 43 is for preventing moisture and the like from entering from the gap between the waterproof member 240 and the electric wire 7a by increasing the degree of close contact with the electric wire 7a.
- the waterproof member 240 attached to the electric wire 7 a is embedded in the second cylindrical portion 13 of the exterior part 10. However, the waterproof member 240 is embedded so that a part of the rear side (including the flange portion 241) is exposed from the rear end surface of the exterior portion 10.
- the material of the waterproof member 240 is a material that is fused to the exterior portion 10 when the exterior portion 10 is molded. For example, when the exterior portion 10 is molded from nylon, the waterproof member 240 can be molded using nylon.
- the wheel speed sensor 201 according to the second embodiment having the above-described configuration includes the covering member 50 included in the wheel speed sensor 1 according to the first embodiment by using the waterproof member 240 as a material that is fused to the exterior portion 10. There is no need.
- the wheel speed sensor 201 according to the second embodiment has the same waterproof performance as that of the wheel speed sensor 1 according to the first embodiment, and the number of parts is reduced as compared with the wheel speed sensor 1 according to the first embodiment. And cost can be reduced.
- the material of the waterproof member 240 is exemplified, but other materials may be used.
- a material such as urethane can be used for the waterproof member 240.
- the shape of the waterproof member 240 is not limited to that shown in FIG.
- an anti-slip portion similar to the anti-slip portion 54 of the covering member 50 of the first embodiment may be provided on the outer peripheral surface of the waterproof member 240.
- FIG. 8 is an external view of a wheel speed sensor 301 according to the third embodiment.
- 9 and 10 are exploded perspective views of the wheel speed sensor 301 according to the third embodiment.
- FIG. 11 is a cross-sectional view showing the internal configuration of the wheel speed sensor 301 according to the third embodiment.
- the wheel speed sensor 301 according to the third embodiment includes an exterior part 310 formed of synthetic resin.
- the exterior portion 310 includes a tip portion 311 having a substantially rectangular parallelepiped shape with chamfered corner portions, a first column portion 312 having a substantially column shape, and a second column having a substantially column shape having a diameter larger than that of the first column portion 312.
- a portion 313 is included.
- the exterior portion 310 has a form in which a tip portion 311, a first cylindrical portion 312 and a second cylindrical portion 313 are connected in this order.
- a fixing member 315 for fixing the wheel speed sensor 301 to the vehicle is provided between the first cylindrical portion 312 and the second cylindrical portion 313 of the exterior portion 310.
- the fixing member 315 may be manufactured as a separate part and fixed to the exterior part 310, may be integrally formed with the exterior part 310, or may have a structure other than these.
- the exterior part 310 is assembled by assembling the first part integrally molded with the tip part 311 and the first cylindrical part 312 and the second part integrally molded with the fixing member 315 and the second cylindrical part 313. It is said.
- the fixing member 315 is a substantially oval plate, and a substantially circular through hole 16 is formed on one side in the longitudinal direction.
- the wheel speed sensor 301 is fixed to an appropriate position of the vehicle through a through hole 16 of the fixing member 315 by a method such as screwing.
- the Hall IC 20 held by the synthetic resin holder 30 is embedded in the distal end portion 311 of the exterior portion 310.
- FIG. 11 the detailed configurations of the Hall IC 20 and the holder 30 are not shown.
- the configurations of the Hall IC 20 and the holder 30 are the same as those shown in FIGS. 5 and 6, for example, in the first embodiment.
- Two electric wires 7 a connected to the Hall IC 20 are embedded in the first cylindrical portion 312 and the second cylindrical portion 313 of the exterior portion 310.
- the two electric wires 7a connected to the Hall IC 20 are exposed to the outside from the rear end side of the exterior part 310.
- the rear end surface of the exterior portion 310 that is, the rear end surface of the second cylindrical portion 313 has a substantially circular shape, and a cylindrical protrusion 314 having a substantially cylindrical shape protrudes from the center of the rear end surface.
- the columnar protrusion 314 has a substantially columnar shape that is thinner than the second columnar portion 313, and is provided so as to be substantially coaxial with the second columnar portion 313.
- the two electric wires 7 a embedded in the exterior part 310 are exposed to the outside from the rear end surface of the cylindrical protrusion 314.
- a waterproof member 340 is fixed to the rear portion of the wheel speed sensor 301 according to the third embodiment.
- the waterproof member 340 has a substantially cylindrical shape, and is an elastic member formed using, for example, silicon.
- a cylindrical hole 341 is formed on one end (front side) of the waterproof member 340.
- the waterproof member 340 is attached and fixed to the exterior portion 310 by inserting and fitting the cylindrical projection 314 of the exterior portion 310 into the hole portion 341.
- the diameter of the hole 341 is substantially the same as or smaller than the diameter of the cylindrical protrusion 314.
- the axial length (depth) of the hole 341 is longer than the length of the cylindrical protrusion 314.
- protrusions 343 extending around the circumference in two places.
- the protrusion 343 of the hole 341 is in close contact with the outer peripheral surface of the cylindrical protrusion 314 when the cylindrical protrusion 314 of the exterior part 310 is inserted into the hole 341. Thereby, it is possible to prevent moisture and the like from entering from the gap between the hole 341 and the cylindrical protrusion 314. Further, the waterproof member 340 can be more securely fixed to the exterior part 310.
- two through holes 342 reaching the other end (rear side) end surface of the waterproof member 340 are formed substantially parallel to the axial direction.
- the two through holes 342 are for inserting the electric wires 7a, respectively.
- protrusions 344 are provided at two locations over the entire circumference. The protruding portion 344 of the through hole 342 is in close contact with the electric wire 7 a inserted through the through hole 342 and prevents moisture and the like from entering through the through hole 342.
- the waterproof member 340 there are provided four protrusions 345 over the circumference.
- the four protrusions 345 are provided in two positions at the front position in the axial direction of the waterproof member 340 and two at the rear position.
- the protrusions 345 are for increasing the degree of adhesion with a covering member 350 described later.
- the wheel speed sensor 301 includes a covering member 350 that covers the waterproof member 340.
- the covering member 350 has a substantially cylindrical shape, and the waterproof member 340 is inserted therein to cover the outer peripheral surface of the waterproof member 340.
- the front end portion of the covering member 350 is fixed to the exterior portion 310 by externally fitting the rear end portion of the second cylindrical portion 313. Note that the covering member 350 may be bonded to the exterior portion 310 with an adhesive or the like.
- the substantially cylindrical covering member 350 has a rear-side opening diameter narrowed in a step shape from the front side. As a result, when the covering member 350 is fixed to the exterior part 310, it can be prevented from falling off from the rear opening of the waterproof member 340 accommodated therein.
- the two electric wires 7 a extend from the high end surface of the waterproof member 340 to the outside through the rear opening of the covering member 350.
- a flange portion 353 is provided in the vicinity of the rear end of the outer peripheral surface of the covering member 350.
- the flange portion 353 is provided over substantially the entire circumference of the outer peripheral surface of the covering member 350, but has several cutouts.
- the flange portion 353 engages with a cover member 360 attached to the rear side of the wheel speed sensor 301 to prevent the cover member 360 from falling off.
- the cover member 360 is a cylindrical elastic member.
- the cover member 360 is attached to the rear portion of the wheel speed sensor 301 so as to cover the second cylindrical portion 313 and the covering member 350 of the exterior portion 10. By attaching the cover member 360, it is possible to mitigate impacts from the outside on the wheel speed sensor 301 and to prevent intrusion of moisture and the like.
- the exterior IC 310 is molded by sealing the Hall IC 20 and the electric wire 7a with a synthetic resin.
- the waterproof member 340 is fixed to the cylindrical protrusion 314 of the exterior part 310.
- the waterproof member 340 can be fixed to the exterior part 310 by inserting and fitting the cylindrical protrusion 314 of the exterior part 310 into the hole 341 of the waterproof member 340.
- the covering member 350 is attached so as to cover the waterproof member 340 from the rear side of the wheel speed sensor 301.
- the covering member 350 is fixed in a state in which the front end portion is externally fitted to the second cylindrical portion 313 of the exterior portion 310.
- the cover member 360 is mounted from the rear side of the wheel speed sensor 301 so as to cover the second cylindrical portion 313 and the covering member 350 of the exterior portion 310.
- the cover member 360 is attached with its rear end portion being locked to the flange portion 353 of the covering member 350.
- the wheel speed sensor 301 uses the waterproof member 340 in which a through hole into which the electric wire 7a connected to the Hall IC 20 is inserted is used, and the Hall IC 20 and a part of the electric wire 7a are synthesized.
- the waterproof member 340 is fixed to the exterior part 310 sealed with resin to prevent moisture and the like from entering the wheel speed sensor 301.
- the waterproof member 340 is a member that can prevent moisture from entering through the through hole, for example, by bringing the protrusion 344 in the through hole into close contact with the electric wire 7a.
- the waterproof member 340 is fixed to the exterior portion 310 by fitting the hole portion 341 formed in the waterproof member 340 with the cylindrical protrusion 314 of the exterior portion 310. Thereby, the waterproof member 340 can be fixed easily. Further, by providing the protrusion 343 in the hole 341 of the waterproof member 340, the protrusion 343 in the hole 341 can be brought into close contact with the outer peripheral surface of the cylindrical protrusion 314 of the resin molded portion 310, so that moisture or the like can enter. Can be prevented, and the waterproof member 340 can be more securely fixed to the exterior portion 310.
- the covering member 350 by covering the outer peripheral surface of the waterproof member 340 with the covering member 350, it is possible to further prevent the intrusion of moisture or the like into the wheel speed sensor 301. Further, by forming the protrusion 345 on the outer peripheral surface of the waterproof member 340, the protrusion 345 can be brought into close contact with the inner surface of the covering member 350 that covers the waterproof member 340, and the covering member 350 is hardly detached from the wheel speed sensor 301. be able to.
- the materials such as the exterior part 310, the waterproof member 340, the covering member 350, and the cover member 360 according to the third embodiment include the exterior part 10, the waterproof member 40, the covering member 350, and the cover member 360 according to the first embodiment. Similar materials can be used.
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Abstract
Description
また更に、防水部材の外周面に凹部又は凸部を形成し、被覆部材の内周面に凸部又は凹部を形成して、凹部及び凸部の係合によって防水部材が軸方向へ移動することを被覆部材が係止する構成としてもよい。これにより防水部材と被覆部材とを強固に固定することができ、防水部材を樹脂成形部により確実に固定することができる。
以下、本発明をその実施の形態を示す図面に基づき具体的に説明する。図1は、本実施の形態に係る車輪速センサを有するワイヤハーネスの構成を説明するための模式図である。図示のワイヤハーネス7は一端に車輪速センサ1が接続されている。車輪速センサ1は、車輌の車輪(図示は省略する)と一体的に回転するロータ9に対向するように、車輌の適所に不動に固定される。車輪速センサ1は、円棒又は角棒等の棒状の外形をなし、その一端側にホールIC20(図4~図6参照)が埋め込まれ、反対端側から2本の電線7aが延出している。
図7は、実施の形態2に係る車輪速センサ201の内部構成を示す側断面図である。実施の形態2に係る車輪速センサ201は、被覆部材50を備えていない。実施の形態2に係る車輪速センサ201は、外装部10に融着する素材で成型された防水部材240を備えている。
図8は、実施の形態3に係る車輪速センサ301の外観図である。図9及び図10は、実施の形態3に係る車輪速センサ301の分解斜視図である。図11は、実施の形態3に係る車輪速センサ301の内部構成を示す断面図である。実施の形態3に係る車輪速センサ301は、合成樹脂にて成形された外装部310を備えている。外装部310は、角部分が面取りされた略直方体形をなす先端部分311、略円柱形をなす第1円柱部分312、及び、第1円柱部分312より直径が大きい略円柱形をなす第2円柱部分313を有している。外装部310は、先端部分311、第1円柱部分312及び第2円柱部分313がこの順で連結された態様をなしている。
7 ワイヤハーネス
7a、7b 電線
8 コネクタ
9 ロータ
10 外装部(樹脂成形部)
11 先端部分
12 第1円柱部分
13 第2円柱部分
14 鍔部
15 固定部材
16 貫通孔
20 ホールIC(センサ部品)
21 磁電変換子
22 金属端子(端子)
23 コンデンサ
30 ホルダ
31 ベース部分
32 蓋部分
40 防水部材
41 溝部(凹部)
42 突起部
43 突起部
50 被覆部材
51 切欠部
52 突出部(凸部)
53 鍔部
54 滑り止め部
60 カバー部材
61 係止部
201 車輪速センサ
240 防水部材
241 鍔部
301 車輪速センサ
310 外装部(樹脂成形部)
311 先端部分
312 第1円柱部分
313 第2円柱部分
314 円柱突部
315 固定部材
340 防水部材
341 穴部
342 貫通孔
343、344、345 突起部
350 被覆部材
353 鍔部
360 カバー部材
Claims (12)
- 磁電変換子及び該磁電変換子に設けられた端子を有するセンサ部品と、前記端子に接続された電線と、前記センサ部品及び前記電線の一部を合成樹脂にて封止した樹脂成形部とを備え、車輪に連動したロータの回転による磁界変化を前記磁電変換子にて検知して電気信号に変換して前記端子から出力する車輪速センサにおいて、
前記電線が挿入される貫通孔が形成され、前記電線が挿入された場合に前記貫通孔内の水分の通過を防止するようにしてある防水部材と、
該防水部材を前記樹脂成形部に対して固定する固定手段と
を備えること
を特徴とする車輪速センサ。 - 前記固定手段は、前記防水部材に形成された穴部と、前記樹脂成形部の一部分との嵌合により前記防水部材を固定すること
を特徴とする請求項1に記載の車輪速センサ。 - 前記防水部材は、弾性を有する部材であり、
前記穴部内には、突起部が設けてあること
を特徴とする請求項2に記載の車輪速センサ。 - 前記防水部材の外周面を覆う筒状の被覆部材を更に備えること
を特徴とする請求項1乃至請求項3のいずれか1つに記載の車輪速センサ。 - 前記防水部材の外周面には、突起部が設けてあること
を特徴とする請求項4に記載の車輪速センサ。 - 前記固定手段は、前記樹脂成形部にて前記防水部材の一部又は全部を前記センサ部品及び前記電線の一部と共に合成樹脂にて封止することにより前記防水部材を固定すること
を特徴とする請求項1に記載の車輪速センサ。 - 磁電変換子及び該磁電変換子に設けられた端子を有するセンサ部品と、前記端子に接続された電線と、前記センサ部品及び前記電線の一部を合成樹脂にて封止した樹脂成形部とを備え、車輪に連動したロータの回転による磁界変化を前記磁電変換子にて検知して電気信号に変換して前記端子から出力する車輪速センサにおいて、
前記電線が挿入される筒状の防水部材を更に備え、
前記樹脂成形部は、前記防水部材の一部又は全部を前記センサ部品及び前記電線の一部と共に合成樹脂にて封止してあること
を特徴とする車輪速センサ。 - 前記防水部材の外周面を覆う筒状の被覆部材を更に備え、
前記樹脂成形部は、前記被覆部材の一部又は全部を前記センサ部品、前記電線の一部及び前記防水部材と共に合成樹脂にて封止してあること
を特徴とする請求項6又は請求項7に記載の車輪速センサ。 - 前記防水部材は、凹部又は凸部が外周面に形成され、
前記被覆部材は、前記防水部材の凹部又は凸部に係合する凸部又は凹部が内周面に形成され、
凹部及び凸部の係合により、前記防水部材及び前記被覆部材の軸方向への移動を係止するようにしてあること
を特徴とする請求項8に記載の車輪速センサ。 - 前記被覆部材は、前記樹脂成形部の合成樹脂と融着する素材であること
を特徴とする請求項8又は請求項9に記載の車輪速センサ。 - 前記防水部材は、前記樹脂成形部の合成樹脂と融着する素材であること
を特徴とする請求項6又は請求項7に記載の車輪速センサ。 - 請求項1乃至請求項11のいずれか1つに記載の車輪速センサが有する電線を含む複数の電線を合成樹脂にて被覆して1本としたことを特徴とするワイヤハーネス。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US14/655,585 US9678096B2 (en) | 2012-12-28 | 2013-10-29 | Wheel speed sensor and wire harness |
JP2014554207A JP5817941B2 (ja) | 2012-12-28 | 2013-10-29 | 車輪速センサ及びワイヤハーネス |
MX2015008495A MX340713B (es) | 2012-12-28 | 2013-10-29 | Sensor de velocidad de rueda y mazo de cables. |
CN201380068501.7A CN104884962B (zh) | 2012-12-28 | 2013-10-29 | 轮速传感器及线束 |
Applications Claiming Priority (2)
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JP2012288734 | 2012-12-28 | ||
JP2012-288734 | 2012-12-28 |
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WO2014103499A1 true WO2014103499A1 (ja) | 2014-07-03 |
Family
ID=51020598
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PCT/JP2013/079209 WO2014103499A1 (ja) | 2012-12-28 | 2013-10-29 | 車輪速センサ及びワイヤハーネス |
Country Status (5)
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US (1) | US9678096B2 (ja) |
JP (1) | JP5817941B2 (ja) |
CN (1) | CN104884962B (ja) |
MX (1) | MX340713B (ja) |
WO (1) | WO2014103499A1 (ja) |
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CN104884962A (zh) | 2015-09-02 |
MX340713B (es) | 2016-07-20 |
JPWO2014103499A1 (ja) | 2017-01-12 |
US20150355213A1 (en) | 2015-12-10 |
US9678096B2 (en) | 2017-06-13 |
JP5817941B2 (ja) | 2015-11-18 |
MX2015008495A (es) | 2015-09-10 |
CN104884962B (zh) | 2018-02-06 |
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