CN105745532A - Gas sensor - Google Patents
Gas sensor Download PDFInfo
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- CN105745532A CN105745532A CN201480063518.8A CN201480063518A CN105745532A CN 105745532 A CN105745532 A CN 105745532A CN 201480063518 A CN201480063518 A CN 201480063518A CN 105745532 A CN105745532 A CN 105745532A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/409—Oxygen concentration cells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4078—Means for sealing the sensor element in a housing
Abstract
A gas sensor provided with a terminal fitting (1) having a cylindrical portion for thermal insulation layer formation (15) that is exposed from the proximal end side of a gas sensor element (3), an element side abutting portion (14) that abuts a flat surface part (34) that is perpendicular to the longitudinal axis of a solid electrolyte body (300), a proximal end side abutting portion (16) that abuts the bottom surface (40) of a grommet, a conduction part (12) for facilitating conduction with a reference electrode layer (320), and a crimping part (10) for crimping and fixing a core wire (20) of a signal line, wherein a thermal insulation space part (SPTI) is provided that separates the grommet (4) and the gas sensor element (3) and communicates with a ventilation hole (52).
Description
Technical field
The present invention relates to the gas sensor that the concentration to the specific gas composition in determined gas detects.
Background technology
In the past, on the burning and gas-exhausting stream of the internal combustion engines such as automobile engine, arrange the gas sensor that the concentration to specific gas compositions such as oxygen contained in burning and gas-exhausting detects, carry out the temperature control etc. of air-fuel ration control and Exhaust treating catalyst agent according to the concentration of the specific gas composition detected.
As such gas sensor, possess and be formed as, by the solid electrolyte material that zirconium oxide etc. is had oxygen-ion conductive, the solid electrolyte body that has bottom tube-like, at the mensuration electrode layer that its outer peripheral face side contacts with determined gas, and the detecting element of so-called cup type that the reference electrode layer of within it side face side and the atmosphere imported as reference gas is constituted, detect the potential difference produced between two electrodes because of the difference of the oxygen concentration in the oxygen concentration in determined gas and reference gas to measure the oxygen sensor of the oxygen concentration in determined gas, the air-fuel ratio sensor of the air-fuel ratio of the gaseous mixture that the Concentration Testing according to the specific gas composition in burning and gas-exhausting imports to internal combustion engine, the ammoniacal sensor etc. detecting the ammonia density in determined gas with hydrogen ion conductivity solid electrolyte body is widely applied.
In recent years, such gas sensor is also used on automatic two-wheel vehicle used electromotor.In automatic two-wheeled cycle electromotor, carry the limited space of gas sensor, it is disposed in the position that the temperature of burning and gas-exhausting as determined gas is high, do not use the heater of the activation for solid electrolyte body, and be arranged to utilize the structure of used heat, thus realize reduction and the miniaturization of manufacturing cost simultaneously.Therefore, automatic two-wheel vehicle used gas sensor is not disposed only under the cold and hot pressure harsher than the gas sensor of passenger car, and using in the harsh environments such as outside high vibration and trickle, therefore have further miniaturization and improve the high request of vibration resistance and durability.
Patent document 1 discloses that existing gas sensor, it possess the detecting element of tubular, the terminal fittings keeping the main metal fixture of detecting element electrically connect with detecting element, from terminal fittings extend and formed the lead-in wire of current path, the separator inserted for lead-in wire, surround separator surrounding inner core, be arranged in the bore of inner core the grommet (grommet) inserted for lead-in wire, the filter being arranged in the radial outside of internal diameter and and inner core between be folded with the urceolus of filter, and there is the structure that the detected element of separator clamps with grommet.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2013-104832 publication
Summary of the invention
The problem that invention to solve
But, in the existing gas sensor of patent documentation 1, as separator, use the ceramics insulator that the thermal conductivities such as aluminium oxide are higher.Therefore, from the test section of the front end of the gas sensor being arranged in the determined gas being placed in more than hundreds of DEG C, grommet is heated by separator as heat carrier.Particularly, in the structure being clamped separator as the gas sensor of patent documentation 1 by detecting element and grommet, the bottom surface of grommet contacts with separator on a large scale, and the heat therefore received from separator increases, it is possible to cause the heat deterioration of grommet.
If causing due to heat deterioration, grommet follows the string, then the retentivity of terminal fittings declines, and produces gap between terminal fittings and detecting element.In this state, if applying from outside vibration, then the conducting easy moment between terminal fittings and detecting element disconnects, and can cause the conducting reliability decrease of terminal fittings.Additionally, in existing gas sensor, by making separator longer to strengthen the distance between thermal source, although can suppress the heat deterioration of grommet, but this become hinder gas sensor miniaturization will be because of.
Therefore, in view of this situation, it is an object of the invention to, there is provided a kind of gas sensor with excellent structure, it is possible to realize miniaturization and suppress the heat deterioration of grommet, and, even if in the face of from outside vibration, terminal fittings is not impaired with the conducting reliability of detecting element yet.
For solving the scheme of problem
The gas sensor of the present invention (8,8a～8i) at least possesses terminal fittings (1,1a～1h), holding wire (2), gas sensor element (3,3c, 3d, 3e), grommet (4), housing (5) and cover body (7) that the special component in determined gas is detected.Above-mentioned gas sensor element (3, 3c, 3d, 3e) at least possess by the solid electrolyte body (300) having bottom tube-like, the test section (30) that mensuration electrode layer (310) and reference electrode layer (320) are constituted, specific ion is had conductivity by above-mentioned solid electrolyte body (300), said determination electrode layer (310) forms the outer surface (301) at this solid electrolyte body, contact with determined gas (91), said reference electrode layer (320) forms the inner peripheral surface (321 at above-mentioned solid electrolyte body, 321c, 321e), with the atmosphere imported as reference gas.Above-mentioned holding wire (2) connects this gas sensor element and outside connection.Above-mentioned terminal fittings (1,1a～1h) connects above-mentioned gas sensor element and above-mentioned holding wire.Above-mentioned cover body (7) houses above-mentioned gas sensor element, and above-mentioned test section is arranged and is fixed in determined gas.The base end side of above-mentioned gas sensor element is covered by the housing (5) of above-mentioned tubular together with above-mentioned terminal fittings, and possesses the passage (52) for importing air to the inside.Above-mentioned grommet (4) seals the base end side of this housing airtightly, and keeps the above-mentioned holding wire being connected with above-mentioned terminal fittings.And then, in above-mentioned gas sensor (8,8a～8i), being provided with waterproof filter (61), this waterproof filter (61) and above-mentioned passage are opposed to arrange, and are stoped the Porous fiber body structure of penetration by liquid to constitute by allowing gas permeation.So, in the above-mentioned gas sensor (8,8a～8i) of the special component detected in determined gas, it is characterized in that, above-mentioned terminal fittings possesses: heat insulation layer formation cylindrical portion (15,15b～15e), be formed as tubular, expose from the base end side of above-mentioned gas sensor element with the length of regulation；The component side abutting part that abuts in the planar portions (34,34e) being perpendicular to major axis of the front of this heat insulation layer formation cylindrical portion and above-mentioned solid electrolyte body (14,14c, 14e) or the component side abutted with the inclined plane (34d) comprising vertical component tilt abutting part (14d)；Base end side abutting part (16,16c, 16e), abuts with the bottom surface (40) of above-mentioned grommet at the base end side of above-mentioned heat insulation layer formation cylindrical portion；Conducting portion (12,12b～12e, 12h), abuts with said reference electrode layer elasticity and realizes conducting；And pressure contact portion (10,10g, 10h), the heart yearn (20) of above-mentioned holding wire is crimped fixing.And then, in above-mentioned gas sensor (8,8a～8i), being provided with will isolation and the adiabatic space portion (SP that connects with above-mentioned passage between above-mentioned grommet with above-mentioned gas sensor elementTI)。
Invention effect
In the structure of the gas sensor of the present invention, by above-mentioned heat insulation layer formation cylindrical portion, adiabatic space portion is formed between above-mentioned gas sensor element and above-mentioned grommet, there is, in this adiabatic space portion, the atmosphere that thermal insulation is high, and then, this air easily exchanges with outside air via above-mentioned passage.In addition, make solid electrolyte body activate the gas sensor of the simple construction detecting specific gas composition even by the high temperature of determined gas (such as discharging gas), also by forming above-mentioned adiabatic space portion thus blocking the conduction of heat towards above-mentioned grommet bottom surface, grommet will not be placed in high temperature.Therefore, the high insulator of the heat conductivities such as aluminium oxide will not be produced as the structure of existing gas sensor to become heating agent and directly the bottom surface of grommet is heated thus the problem that causes heat deterioration.
In addition, in the structure of the gas sensor of the present invention, above-mentioned adiabatic space portion is also as the electric insulation layer function between above-mentioned housing and above-mentioned terminal fittings, therefore the insulator for keeping terminal fittings can not be used, namely can discard this insulator, thus can also reduce the volume that gas sensor is overall.Owing to the above-mentioned heat insulation layer formation cylindrical portion of above-mentioned terminal fittings is by above-mentioned gas sensor element and above-mentioned grommet resilient clamp, even if therefore in the face of the vibration from outside, the reliability of the conductance general character of terminal fittings and detecting element is without impaired, using the teaching of the invention it is possible to provide the gas sensor that reliability that the conductance general character is excellent is high.
Accompanying drawing explanation
Fig. 1 indicates that the longitudinal section of the overall summary of the gas sensor 8 of the 1st embodiment of the present invention.
In Fig. 2, (A) major part of the gas sensor 8 of Fig. 1 and the axonometric chart of the summary of terminal fittings 1 are indicated that, (B) it is the half section figure of the terminal fittings 1 shown in Fig. 2 (A), (C) being the sectional view represented that overlapped in the cross section along C-C, D-D, E-E of Fig. 2 (B), (D) indicates that the sectional view of the variation 1a in the cross section along C-C, D-D, E-E of Fig. 2 (B).
Fig. 3 is an illustration for the main portion sectional view of the effect of the gas sensor 8 shown in Fig. 1.
In Fig. 4, (A) axonometric chart of the summary of the terminal fittings 1b of the gas sensor 8b of the 2nd embodiment of the present invention is indicated that, (B) being the half section figure of the terminal fittings 1b shown in Fig. 4 (A), (C) is an illustration for the main portion sectional view of the effect of the gas sensor 8b of the 2nd embodiment of the present invention.
In Fig. 5, (A) indicate that the present invention the 3rd embodiment gas sensor 8c in the axonometric chart of summary of terminal fittings 1c, (B) it is the half section figure of the terminal fittings 1c shown in Fig. 5 (A), (C) indicating that the major part amplification sectional view of the relation of terminal fittings 1c and sensor element 3c, (D) is an illustration for the main portion sectional view of the effect of the gas sensor 8c of the 3rd embodiment of the present invention.
In Fig. 6, (A) axonometric chart of the summary of the terminal fittings 1d of the gas sensor 8d of the 4th embodiment of the present invention is indicated that, (B) it is the half section figure of the terminal fittings 1d shown in Fig. 6 (A), (C) indicating that the major part amplification sectional view of the relation of terminal fittings 1d and sensor element 3d, (D) is an illustration for the main portion sectional view of the effect of the gas sensor 8d of the 4th embodiment of the present invention.
In Fig. 7, (A) axonometric chart of the summary of the terminal fittings 1e of the gas sensor 8e of the 5th embodiment of the present invention is indicated that, (B) it is the half section figure of the terminal fittings 1e shown in Fig. 7 (A), (C) indicating that the major part amplification sectional view of the relation of terminal fittings 1e and sensor element 3e, (D) is an illustration for the main portion sectional view of the effect of the gas sensor 8e of the 5th embodiment of the present invention.
In Fig. 8, (A) axonometric chart of the summary of the terminal fittings 1f of the gas sensor 8f of the 6th embodiment of the present invention is indicated that, (B) being the half section figure of the terminal fittings 1f shown in Fig. 8 (A), (C) is an illustration for the main portion sectional view of the effect of the gas sensor 8f of the 6th embodiment of the present invention.
In Fig. 9, (A) axonometric chart of the summary of the terminal fittings 1g of the gas sensor 8g of the 7th embodiment of the present invention is indicated that, (B) being the half section figure of the terminal fittings 1g shown in Fig. 9 (A), (C) is an illustration for the main portion sectional view of the effect of the gas sensor 8g of the 7th embodiment of the present invention.
In Figure 10, (A) axonometric chart of the summary of the terminal fittings 1h of the gas sensor 8h of the 8th embodiment of the present invention is indicated that, (B) indicating that the half section figure of the terminal fittings 1h shown in Figure 10 (A), (C) is an illustration for the main portion sectional view of the effect of the gas sensor 8h of the 8th embodiment of the present invention.
Figure 11 indicates that the longitudinal section of the summary of the gas sensor 8i of the 9th embodiment of the present invention.
Detailed description of the invention
(the 1st embodiment)
With reference to Fig. 1, Fig. 2 (A), (B), (C), (D) and Fig. 3, the structure of gas sensor 8 of the 1st embodiment of the present invention, action, effect etc. are described.It addition, in the following description, gas sensor 8 is called front to the side that determined gas exposes, the side drawing holding wire 2 to outside is called base end side.The gas sensor 8 of the present invention, 8b～8i are the gas sensors of so-called directly-heated type (Heater-lesstype), burning and gas-exhaustings using internal combustion engines such as automobile engine, automatic two-wheeled cycle electromotors etc. are as determined gas 91, determined gas flow path wall 90 it is fixed in the position of the aiutage close to internal combustion engine, the high temperature utilizing determined gas 91 carrys out activating solid electrolyte body, detects the special component in determined gas.Additionally, for the ease of understanding the present invention, in the following description, illustrate for the oxygen sensor using solid electrolyte material that zirconium oxide etc. has oxygen-ion conductive, but in the present invention, do not limit detection object, according to detection object, proton conductor etc. can also be used as the solid electrolyte material constituting gas sensor element 3, or except being used for detecting oxygen concentration, be additionally operable to detection air-fuel ratio, NOx, ammonia etc..
The gas sensor 8 of the 1st embodiment at least includes terminal fittings 1, holding wire 2, gas sensor element 3, grommet 4, housing 5 and cover body 7 and constitutes.Gas sensor element 3 is the element of so-called cup type, possess by solid electrolyte body 300, measure electrode layer 310 and the test section 30 of reference electrode layer 320 composition, specific ion will be had that conductive solid electrolyte material is formed as that one end is inaccessible by above-mentioned solid electrolyte body 300 and the bottom tube-like that has of other end opening forms, said determination electrode layer 310 forms the outer surface 301 at this solid electrolyte body 300, flow through with in determined gas flow path, the determined gas 91 invaded from the peristome 77 of lid 76 contacts, said reference electrode layer 320 forms the inner peripheral surface 321 at solid electrolyte body 300, with the atmosphere imported to as reference gas in reference gas room 32.
Measure electrode layer 310, reference electrode layer 320 is formed respectively through platinum or the known Porous electrode that is made up of platinum alloy.Divide in the inner side of solid electrolyte body 300 and have the reference gas room 32 importing air as reference gas.At the middle part of the base end side of test section 30 and solid electrolyte body 300, in the way of increasing diameter towards outer circumferential side, it is formed with expanding large-diameter portion 31.And then, at the base end side of large-diameter portion 31, be formed be formed as tubular, for realizing and the signal extraction portion 33 of outside connection.
Reference electrode layer 320 is connected with the holding wire 2 being connected to outside by terminal fittings 1.Measure electrode layer 310 to electrically connect with determined gas flow path wall 90 via cover body 7, become ground state.Gas sensor 8 is made up of terminal fittings 1, holding wire 2, gas sensor element 3, grommet 4, housing 5 and cover body 7.
The rustless steel etc. of thermostability, electric conductivity, excellent spring is used as the terminal fittings 1 of the major part of the present invention.Holding wire 2 realizes the electrical connection of gas sensor element 3 and external equipment.Terminal fittings 1 realizes the connection of gas sensor element 3 and holding wire 2.
Terminal fittings 1 in present embodiment by the heart yearn 20 of holding wire 2 being crimped fixing pressure contact portion 10, realize and reference electrode layer 320 conducting conducting portion 12, be used for forming adiabatic space portion SP between the bottom surface 40 and gas sensor element 3 of grommet 4TIHeat insulation layer formation with cylindrical portion 15 and by they link linking part 11,13 constitute.Heat insulation layer formation cylindrical portion 15 is formed as diameter more than the internal diameter of the inner peripheral surface 321 of solid electrolyte body 300 and the local breach tubular that extends in the axial direction with cross section C font.Heat insulation layer formation cylindrical portion 15 is formed as, and exposes from the base end side of gas sensor element 3 with the length of regulation when being installed on solid electrolyte body 300 by terminal fittings 1.
Component side abutting part 14 is formed as, and is connected to the planar portions 34 being perpendicular to major axis of solid electrolyte body 300 in the front of heat insulation layer formation cylindrical portion 15.In the present embodiment, using the base end side end face of solid electrolyte body 300 as planar portions 34.
Base end side abutting part 16 is formed as, and the base end side in heat insulation layer formation cylindrical portion 15 is connected to the bottom surface 40 of grommet 4.That is, base end side abutting part 16 is equivalent to be positioned at the flange part of the end of the base end side of terminal fittings 1.Additionally, the base end side abutting part 16 in present embodiment is formed as to radially-protruding flange shape.Flange shape by being arranged to, it is possible to make the pressure dissipation that the bottom surface 40 of grommet 4 is pressed, it is prevented that locality pressure acts on grommet 4 and produces be full of cracks.
Conducting portion 12 is formed as diameter less times greater than the internal diameter of the inner peripheral surface 321 of solid electrolyte body 300, the local breach tubular that extends in the axial direction with cross section C font.Conducting portion 12 is exerted a force to the outer direction, therefore by conducting portion 12 undergauge while when being installed to solid electrolyte body 300, conducting portion 12 abuts with reference electrode layer 320 elasticity, it is possible to realize turning on.
Additionally, in the present embodiment, a part for conducting portion 12 is provided with tapering 17 in the way of front end attenuates.By forming tapering 17, when being installed to solid electrolyte body 300 by terminal fittings 1, the front end in tapering 17 is as inserting guiding piece function, it is possible to undergauge while being smoothly inserted in the inner peripheral surface 321 of solid electrolyte body 300.The heart yearn 20 of holding wire 2 is crimped fixing by pressure contact portion 10.In the present embodiment, pressure contact portion 10 is arranged on the front of conducting portion 12, reduces the volume of the terminal fittings 1 exposed from gas sensor element 3, it is possible to realize the miniaturization of gas sensor 8.
When being installed on solid electrolyte body 300 by terminal fittings 1, heat insulation layer formation cylindrical portion 15 is exposed from the base end side of solid electrolyte body 300, will isolate, form the adiabatic space portion SP connected with passage 52 between grommet 4 and gas sensor element 3TI.Additionally, by arranging rake on linking part 11,13, pressure contact portion 10, conducting portion 12 and heat insulation layer formation cylindrical portion 15 can be arranged to as shown in Fig. 2 (C) and become concentric, can also illustrating as variation 1a in Fig. 2 (D), in the way of the position of heat insulation layer formation cylindrical portion 15 is consistent with the outer peripheral edge of conducting portion 12, bias arranges.And then, in Fig. 1～Fig. 3, illustrate the example of the external diameter that the external diameter of conducting portion 12 is formed smaller than heat insulation layer formation cylindrical portion 15, but the external diameter of conducting portion 12 can also be formed as identical with the external diameter of heat insulation layer formation cylindrical portion 15, by one side undergauge while being pressed in solid electrolyte body 300, thus being close to the reference electrode layer 320 formed in the inner peripheral surface of solid electrolyte body 300.
Test section 30 by solid electrolyte body 300, formed within it and with the reference electrode layer 320 of the atmosphere being imported into as reference gas and formed outside it and flow through with in determined gas flow path and mensuration electrode layer 310 that the determined gas 91 that invades from the peristome 77 of lid 76 contacts is constituted, be disposed in the determined gas flow path that determined gas 91 (such as discharging gas) is flowed with the state protected by lid 76.
Grommet 4 is made up of thermostability elastomeric elements such as fluorubber, silicone rubber, polyurethane rubbers, is formed as tubular, inserts in inner side and keep holding wire 2.Grommet 4 is inserted in the base end side opening of housing 5 together with the base end part of waterproof filter 61, is sealed fixing by ca(u)lk portion 54.
Housing 5 is formed with step tubular by known metal materials such as ferrum, nickel, rustless steels.Form the large-diameter portion 50 in the front of housing 5 and be embedded in boss (boss) portion 74 of cover body 7, sealed by the weld part 56 of laser weld etc. fixing.It is equipped with multiple passage 52 in the side in the central diameter portion 51 of housing 5, imports air to the inner side of housing 5.The waterproof filter 61 making gas permeation and stop liquid to invade it is provided with at passage 52.
Cover body 7 uses the known thermostability metal materials such as rustless steel, ferrum, nickel, iron-nickel alloy, is formed as tubular, houses gas sensor element 3 in inner side.Being formed with bolt part 75 in the periphery, front of cover body 7, bolt part 75 is fixed on determined gas flow path wall 90, is arranged by the test section 30 covered by the lid 76 with multiple peristome 77 and is fixed in the determined gas flow path that determined gas 91 flows.Base end side at cover body 7 is formed with boss portion 74, installs the large-diameter portion 50 formed in the front of housing 5 herein, forms the fixed part obtained by fixing meanss such as laser weld, fixed gas sensor element 3 airtightly.
Powder filling component 62 uses the parts that the thermostability ceramic powders such as Talcum powder are formed as ring-type.Insulating properties seal member 63 uses the parts that the thermostability ceramic sintered bodies such as aluminium oxide are formed as ring-type.Seal (seal) parts 64 and use the parts that metal material high for the thermostabilitys such as rustless steel is formed as ring-type.
Will be enlarged by the large-diameter portion 31 of the diameter of gas sensor element 3 to clamp across powder filling component 62, insulating properties seal member 63, seal member 64 the element fastener 71 formed on cover body 7 and ca(u)lk portion 73, apply axial force and guarantee air-tightness.A part for gas sensor element 3 is exposed from the base end side of cover body 7, constitutes signal extraction portion 33.
Tubular elastomeric element 60 is flush-mounted in the outer peripheral face 331 of signal extraction portion 33, together with the leading section of waterproof filter 61, using the outer peripheral face 331 of signal extraction portion as the back side, is fixed by ca(u)lk portion 55 ca(u)lk of housing 5.
Waterproof filter 61 uses the Porous fiber body structure being made up of and being formed as tubular fluororesin such as politef.Waterproof filter 61 is arranged on the position opposed with passage 52, has the function allowing to pass through liquid through gas prevention from passage 52 to sensor internal.
Between the signal extraction portion 33 of housing 5 and gas sensor element 3, clamp front and the tubular elastomeric element 60 of waterproof filter 61, a part for the front, central diameter portion 51 of housing 5 is radially oriented central side compression as the back side by the outer peripheral face 331 of signal extraction portion 33, ca(u)lk portion 55 is set and is fixed.In the present embodiment, tubular elastomeric element 60 is disposed in the position of the inner side leaning on gas sensor than waterproof filter 61.
By the front of waterproof filter 61 being compressed and densification by ca(u)lk portion 55, thus the liquid blocking the end, front from waterproof filter 61 invades.Additionally, a part for central diameter portion 51 base end side of housing 5 to be radially oriented central side compression, and then ca(u)lk portion 54 is set, the base end side of waterproof filter 61 is fixed with grommet 4, holding wire 2 ca(u)lk together.
By the base end side of waterproof filter 61 being compressed and densification by the ca(u)lk portion 54 of housing 5, invade thus blocking from the moisture of base end side.Grommet 4 and tubular elastomeric element 60 use the thermostability elastomeric element such as fluorubber, silicone rubber, produce to press the counteracting force in ca(u)lk portion 54,55 from inner elastic so that and between waterproof filter 61, do not produce gap.
In the present invention, the shape of lid 76 and the position of peristome 77, size, quantity etc. are not particularly limited, it is possible to suitably change according to purposes.It is not limited to the situation of the odd number shown in Fig. 1～Fig. 3, it is possible to use the structure arranged with one heart by multiple lids.
In the gas sensor 8 of the present invention, such as shown in Figure 3, the upper surface of opening of solid electrolyte body 300 and planar portions 34 of gas sensor element 3 abut front end face and the component side abutting part 14 of the cylindrical portion having terminal fittings, base end side abutting part 16 (flange part of the end being positioned at base end side of terminal fittings 1) is connected to the bottom surface 40 of grommet 4, between the cardinal extremity and grommet 4 of gas sensor element 3, it is formed with the air adiabatic spatial portion SP being connected via waterproof filter 61 with the passage 52 of the entrance hole as airTI.This air adiabatic spatial portion SPTIAs heat insulation layer function.In existing gas sensor, it is provided with the insulators such as the high aluminium oxide of thermal conductivity, and in the gas sensor 8 of the present invention, it is not provided with the insulators such as the high aluminium oxide of thermal conductivity, therefore the heat of the determined gas that temperature is high will not be delivered to the bottom surface 40 of grommet 4 via insulator, heat deterioration is inhibited, it is possible to realize the gas sensor 8 that the conducting reliability between the conducting portion 12 of terminal fittings 1 and reference electrode layer 320 is excellent.
In gas sensor element 3, the test section 30 being located at front is placed in the determined gas 91 of high temperature, solid electrolyte body 300 is activated due to the high temperature of determined gas 91, play oxygen-ion conductive, the electromotive force that will produce with the difference of the oxygen concentration in the air imported in reference gas room 32 due to the oxygen concentration in determined gas, the testing circuit being located at outside it is sent to via holding wire 2, electromotive force is detected such that it is able to detect the oxygen concentration in determined gas by this testing circuit.
(the 2nd embodiment)
The gas sensor 8b of the 2nd embodiment of the present invention is described with reference to (A), (B), (C) of Fig. 4.Additionally, in the explanation of each embodiment set forth below, to the structure mark same symbol identical with the gas sensor 8 of the 1st embodiment, different part marks has been write afterwards as branch number the symbol (such as 1b etc.) of letter, therefore same section is omitted the description, illustrate centered by the characteristic part in each embodiment.
In the major part of the gas sensor 8b of the 2nd embodiment and terminal fittings 1b, as shown in (A) and (B) of Fig. 4, heat insulation layer formation cylindrical portion 15b is formed as the breach tubular extended in the axial direction with cross section C font.The external diameter of heat insulation layer formation cylindrical portion 15b is formed larger than the inner circumferential footpath of solid electrolyte body 300.
Additionally, as shown in (C) of Fig. 4, conducting portion 12b is again formed as the breach tubular extended in the axial direction with cross section C font.And then, the external diameter of conducting portion 12b is formed less times greater than the inner circumferential footpath of solid electrolyte body 300, to be pressed into the inner side of solid electrolyte body 300 by the state of undergauge.
Conducting portion 12b presses reference electrode layer 320 towards outer elastic and guarantees conducting.In the gas sensor 8b of present embodiment, also using the end face of the base end side of solid electrolyte body 300 as planar portions 34, abut and have component side abutting part 14, abut in the bottom surface 40 of grommet 4 either with or without being formed as flange shape base end side abutting part 16b.Additionally, in the gas sensor 8b of present embodiment, also same with aforementioned embodiments, by adiabatic space portion SPTISuppress the heat deterioration of grommet 4.Furthermore, in the present embodiment, by being configured without the structure of flange part and rake, it is possible to simplify structure, cut down manufacturing cost further.
(the 3rd embodiment)
The gas sensor 8c of the 3rd embodiment of the present invention is described with reference to Fig. 5 (A), Fig. 5 (B), Fig. 5 (C), Fig. 5 (D).In the gas sensor element 3c of the major part of the gas sensor 8c as present embodiment, at the signal extraction portion 33c of the base end side being located at solid electrolyte body 300, as planar portions to make the front path of inner peripheral surface 321c and to be provided with, in the way of the big footpath of base end side, the stage portion 34c that diameter periodically changes.
And then, in the terminal fittings 1c of the gas sensor 8c of present embodiment, in order to a heat insulation layer formation part of cylindrical portion 15c is used as conducting portion 12c, heat insulation layer formation cylindrical portion 15c is formed longer.A part for the front of heat insulation layer formation cylindrical portion 15c is pressed into the inner side of solid electrolyte body 300.The conducting portion 12c of the inner side being pressed into solid electrolyte body 300 presses inner peripheral surface 321c from interior lateral radial elastic, it is achieved with the conducting of reference electrode layer 320.
And then, as shown in Fig. 5 (D), the component side abutting part 14c of the front end of conducting portion 12c is connected to the stage portion 34c of the inner side being arranged on solid electrolyte body 300, the base end side abutting part 16 corresponding with the end of the base end side of the heat insulation layer formation cylindrical portion 15c that the base end side at solid electrolyte body 300 exposes is connected to the bottom surface of grommet 4, and flexibly presses.In the present embodiment, also by adiabatic space portion SPTISuppress the heat deterioration of grommet 4.
In addition, as shown in Fig. 5 (C), conducting portion 12c will be formed in the reference electrode layer 320 elastic pressing to the outer direction of the inner peripheral surface 321c of solid electrolyte body 300 and realizes conducting, in addition, component side abutting part 14c presses the reference electrode layer 320 forming the surface at pressing stage portion 34c in the axial direction, therefore terminal fittings 1c is guaranteed with the conducting of reference electrode layer 320, it is possible to play very high conducting reliability.Additionally, in the present embodiment, in base end side abutting part 16c, with petal-shaped breach while flange shape extension but it also may by the Structural application removing terminal fittings 1b in the structure i.e. gas sensor 8b of the 2nd embodiment being not provided with flange part to the gas sensor of each embodiment.By making base end side abutting part 16c be petal-shaped ground breach, it is possible to the generation of be full of cracks when suppression is formed as flange shape and deformation.
(the 4th embodiment)
The gas sensor 8d of the 4th embodiment of the present invention is described with reference to Fig. 6 (A), (B), (C), (D).Same with the structure of the gas sensor of other embodiments, in the structure of the gas sensor 8d of present embodiment, also by adiabatic space portion SPTISuppress the heat deterioration of grommet 4.
In addition, in the gas sensor element 3d of present embodiment, as shown in Fig. 6 (C) and (D), at the opening of the signal extraction portion 33d of the base end side being arranged at solid electrolyte body 300, be provided with along with towards base end side diameter become larger, as the inclined plane 34d of the rake comprising vertical component.In the terminal fittings 1d of present embodiment, between heat insulation layer formation cylindrical portion 15d and conducting portion 12d, it is provided with component side tilts abutting part 14d.Thus, when making component side inclination abutting part 14d be connected to inclined plane 34d, radial and axial the two direction act on flexible by pressure, for high conducting reliability can be played from outside vibration.
(the 5th embodiment)
The gas sensor 8e of the 5th embodiment of the present invention is described with reference to Fig. 7 (A), (B), (C), (D).In the gas sensor element 3e of the major part of the gas sensor 8e as present embodiment, in being formed at the signal extraction portion 33e of base end side of solid electrolyte body 300, will be formed in the extended outer peripheral face 331e to solid electrolyte body 300 of the reference electrode layer 320 of the inner peripheral surface 321e of solid electrolyte body 300.In the present embodiment, also by forming adiabatic space portion SP between grommet 4 and gas sensor element 3eTISuppress the heat deterioration of grommet 4.
And then, as shown in Fig. 7 (C), a part of the heat insulation layer formation cylindrical portion 15e of terminal fittings 1e is flush-mounted in as conducting portion 12e the outer peripheral face 331e of solid electrolyte body 300.Conducting portion 12e is formed as that the diameter external diameter than the outer peripheral face 331e of solid electrolyte body 300 is slightly smaller and the cross section C font of a part of breach, by produce when conducting portion 12e is inlaid on outer peripheral face 331e the direction from outside towards center by pressure in the way of exerted a force.
Thus, conducting portion 12e presses reference electrode layer 320 from outer circumferential side direction elasticity and realizes conducting.Compared with situation about being pressed into the inner peripheral surface of solid electrolyte body 300 by conducting portion, the external diameter of conducting portion 12e increases, thus the surface area of conducting portion 12e increases, cooling effect improves, additionally it is possible to reduce the heat output to grommet 4.
And then, as shown in Fig. 7 (C), using the stage portion of the periphery that is arranged on signal extraction portion 33 as planar portions 34e, component side abutting part 14e is made to abut, in addition as shown in Fig. 7 (D), the base end side abutting part 16e of heat insulation layer formation cylindrical portion 15e abuts with the bottom surface 40 of grommet 4, also acts on flexible by pressure in the axial direction from grommet 4, it is achieved the raising of conducting reliability.And then, in the way of covering the periphery of conducting portion 12e, it is embedded with tubular elastomeric element 60, is compressed from peripheral direction by ca(u)lk portion 55 together with waterproof filter 61.Conducting portion 12e is exerted a force in the way of to press reference electrode layer 320 extended on the outer peripheral face 331e of signal extraction portion 33e towards central elastic, conducting portion 12e is pressed by tubular elastomeric element 60 overlappingly towards central elastic, therefore, it is possible to improve conducting reliability further.
(the 6th embodiment)
The gas sensor 8f of the 6th embodiment is described with reference to Fig. 8 (A), (B), (C).The front of conducting portion 12 of terminal fittings 1f in the major part of the gas sensor 8f as present embodiment, it is provided with the 2nd conducting portion 18 connected via linking part 19, and makes it that varying diameter portion 322 of the internal diameter undergauge of solid electrolyte body 300 is being connected to reference electrode layer 320.In the present embodiment, same with aforementioned embodiments, it is suppressed that the heat deterioration of grommet 4, it is achieved guaranteeing and the raising of durability of conducting reliability, except this effect, is complementally improved by the 2nd conducting portion 18 and turn on reliability.As shown in Fig. 8 (C), the 2nd conducting portion 18 is formed as being divided into two strands tongue-shaped in front, presses on axially and radially by abutting with the varying diameter portion 322 tilted.Result, even if from outside effect of vibration in terminal fittings 1f, the conducting portion 12 of elastic pressing reference electrode layer 320 and some in axially and radially going up the 2nd conducting portion 18 pressing reference electrode layer 320 all rightly maintain the conducting between reference electrode layer 320 all the time diametrically, therefore, it is possible to play very high conducting reliability.
And then, in the present embodiment, between the signal extraction portion 33 of housing 5f and gas sensor element 3, clamp front and the tubular elastomeric element 60 of waterproof filter 61, the outer peripheral face 331 of signal extraction portion 33 as the back side and is radially oriented the central diameter portion 51 of central side compression shell 5f to arrange ca(u)lk portion 55.In the present embodiment, when ca(u)lk is fixing, waterproof filter 61 is disposed in than tubular elastomeric element 60 position in the inner part.By the leading section of waterproof filter 61 being disposed in than tubular elastomeric element 60 position in the inner part, when forming ca(u)lk portion 55, owing to compressing waterproof filter 61 across tubular elastomeric element 60, therefore, it is possible to suppress too much deformation, gap will not be formed, it is possible to reliably stop water droplet to invade between waterproof filter 61 and tubular elastomeric element 60.
(the 7th embodiment)
Reference Fig. 9 A, Fig. 9 B, Fig. 9 C illustrate summary and the effect thereof of the terminal fittings 1g of the major part of the gas sensor 8g of the 7th embodiment as the present invention.In aforesaid 1st～the 6th embodiment, illustrate the structure of the front end that pressure contact portion 10 is arranged on terminal fittings 1,1a～1f, and in the terminal fittings 1g of the gas sensor 8g of the 7th embodiment, difference is in that, pressure contact portion 10g is arranged on than the heat insulation layer formation cylindrical portion 15g position by base end side.And then, as shown in Fig. 9 (C), it is also possible to be arranged in the front (opposition side of base end side) of grommet 4 house the pressure contact portion spatial portion 41 of pressure contact portion 10g and be housed in the inner side of grommet 4g.The structure of the gas sensor 8g according to present embodiment, owing to pressure contact portion 10g is positioned at base end side compared with passage 52, is configured in the environment comparing low temperature, therefore can also reduce the hot injury of insulating wrapped to holding wire 2.
In addition it is also possible to use the insulant such as aluminium oxide to prepare to arrange in inner side to house the space of pressure contact portion 10g and be formed as the insulator (not shown) of ring-type, and it is installed between heat insulation layer formation cylindrical portion 15g and grommet bottom surface 40g.In this situation, the insulator contact grommet bottom surface 40g that thermal conductivity is high, but due to exist in the position of side more forward than insulator insulated layer formation cylindrical portion 15g support and via passage 52 with the adiabatic space portion SP of atmosphereTI, the heat of the determined gas therefore heated by gas sensor element 3 arrives grommet 4 hardly, it is possible to suppress the heat deterioration of grommet 4.
(the 8th embodiment)
Summary and the effect thereof of the terminal fittings 1h of the major part of the gas sensor 8h of the 8th embodiment as the present invention are described with reference to Figure 10 (A), (B) and (C).In the present embodiment, the heart yearn 20 of holding wire 2 is carried out the fixing pressure contact portion 10h of crimping and is disposed in the center of terminal fittings 1h, via linking part 13h, it is provided with the heat insulation layer formation cylindrical portion 15 with the base end side abutting part 16 abutted with base end side, is provided with conducting portion 12h in front via linking part 11h.
In the structure of the gas sensor 8h of present embodiment, also as shown in Figure 10 (C), the upper surface of opening of solid electrolyte body 300 and planar portions 34 of gas sensor element 3 abut end face and the component side abutting part 14 of the front of the cylindrical portion having terminal fittings, base end side abutting part 16 is connected to the bottom surface 40 of grommet 4, between the cardinal extremity and grommet 4 of gas sensor element 3, be formed with for importing, via waterproof filter 61, the air adiabatic spatial portion SP that the passage 52 of air is connectedTI, therefore the heat deterioration of grommet 4 is suppressed, it is possible to realize the gas sensor 8h that the conductance general character is excellent and reliability is high between the conducting portion 12h of terminal fittings 1h and the reference electrode layer 320 formed in the inner peripheral surface 321 of solid electrolyte body 300.In addition, in the present embodiment, as shown in Figure 10 (C), pressure contact portion 10h is housed in the inner side of gas sensor element 3, therefore, it is possible to reduce the volume of gas sensor 8h.And then, owing to pressure contact portion 10h is arranged on the ratio conducting portion 12h position by base end side, therefore compared with the situation that pressure contact portion 10 is arranged on front end, become big with the distance of thermal source, therefore, it is possible to reduce the hot injury of the insulating wrapped to holding wire 2.
In the structure of the gas sensor 8h of present embodiment, between the signal extraction portion 33 of housing 5 and gas sensor element 3, clamp front and the tubular elastomeric element 60 of waterproof filter 61, the outer peripheral face 331 of signal extraction portion 33 is radially oriented the central diameter portion 51 of central side compression shell 5 to arrange ca(u)lk portion 55 as the back side.In the gas sensor 8h of present embodiment, by the leading section of waterproof filter 61 being disposed in than tubular elastomeric element 60 position in the inner part, thus when forming ca(u)lk portion 55, waterproof filter 61 is compressed across tubular elastomeric element 60, therefore, it is possible to suppress too much deformation, between waterproof filter 61 and tubular elastomeric element 60, it is formed without gap, there is the effect that can reliably stop water droplet to invade.
(the 9th embodiment)
The summary of the gas sensor 8i of the 9th embodiment of the present invention is described with reference to Figure 11.As mentioned above, in the gas sensor 8～8h of the 1st embodiment to the 8th embodiment, illustrate the example of the weld part 56 being provided with the boss portion 74 that the front end of housing 5 is fixed on cover body 7 by laser weld, and in the structure of the gas sensor 8i of the 9th embodiment, it is provided with to the casing ledge portion 56i that peripheral direction is stretched out in the front end of housing 5i, with powder filling component 62i, insulating properties seal member 63i, seal member 64 is together, it is clamped between the powder filling part fastener 72 of cover body 7i and ca(u)lk portion 73i, apply axial axial force and ca(u)lk is fixed.This point is different from the structure of the gas sensor of other embodiments.As shown in figure 11, in the front end in central diameter portion 51 of housing 5i of the gas sensor 8i of the 9th embodiment, it is provided with and is radially oriented with the casing ledge portion 56i of shape for hat extension.This casing ledge portion 56i is fixed by the ca(u)lk portion 73i ca(u)lk of cover body 7i together with seal member 64.
In addition, figure 11 illustrates the example of the mutually isostructural terminal fittings 1 of terminal fittings 1 used and use in the gas sensor 8 of the 1st embodiment but it also may use any one in the terminal fittings 1a～1h used in the gas sensor of other embodiments aforementioned.In the gas sensor 8i of present embodiment, also same with the gas sensor of other embodiments aforementioned, by heat insulation layer formation cylindrical portion 15, between the cardinal extremity and grommet 4 of gas sensor element 3, it is formed with the air adiabatic spatial portion SP being connected with the passage 52 for importing air via waterproof filter 61TI, therefore the heat deterioration of grommet 4 is suppressed, it is possible to realize the gas sensor 8i that the conducting reliability between the conducting portion 12 of terminal fittings 1 and reference electrode layer 320 is excellent.
Symbol description
1,1b～1h terminal fittings
10 pressure contact portions
12 conducting portions
14 component side abutting parts
14d component side tilts abutting part
15 heat insulation layer formation cylindrical portion
16 base end side abutting parts
2 holding wires
20 holding wire heart yearns
3 gas sensor elements
30 test sections
300 solid electrolyte bodies
301 solid electrolyte outer circumferential surface
310 measure electrode layer
32 reference gas rooms
320 reference electrode layers
The inner peripheral surface of 321 solid electrolyte bodies
34 solid electrolyte body planar portions
34d solid electrolyte body inclined plane
4 grommets
40 grommet bottom surfaces
5 housings
52 passages
61 waterproof filters
7 cover bodies
8 gas sensors
91 determined gases
SPTIAdiabatic space portion
Claims (14)
1. a gas sensor (8,8a～8i), detects the special component in determined gas, possesses:
Gas sensor element (3), detect the special component in determined gas, at least possess by the solid electrolyte body (300) having bottom tube-like, the test section (30) that mensuration electrode layer (310) and reference electrode layer (320) are constituted, specific ion is had conductivity by above-mentioned solid electrolyte body (300), said determination electrode layer (310) forms the outer surface (301) at this solid electrolyte body, and contact with determined gas (91), said reference electrode layer (320) forms the inner peripheral surface (321 at above-mentioned solid electrolyte body, 321c, 321e), and with the atmosphere imported as reference gas；
Holding wire (2), connects this gas sensor element with outside；
Terminal fittings (1,1b～1h), connects above-mentioned gas sensor element and above-mentioned holding wire；
Cover body (7), houses above-mentioned gas sensor element, above-mentioned test section is arranged and is fixed in determined gas (91)；
The housing (5) of tubular, covers the base end side of above-mentioned gas sensor element together with above-mentioned terminal fittings, possesses the passage (52) importing air to the inside；
Grommet (4), seals the base end side of this housing airtightly, keeps the above-mentioned holding wire being connected with above-mentioned terminal fittings；And
Waterproof filter (61), is opposed to arrange with above-mentioned passage, by allowing gas permeation to stop the Porous fiber body structure of penetration by liquid to constitute,
Above-mentioned gas sensor is characterised by,
Above-mentioned terminal fittings possesses:
Heat insulation layer is formed with cylindrical portion (15,15b～15e), is formed as tubular, exposes from the base end side of above-mentioned gas sensor element with the length of regulation；
Component side abutting part (14,14c, 14e) or component side tilt abutting part (14d), said elements side abutting part (14,14c, 14e) is connected to the planar portions (34,34e) being perpendicular to major axis of above-mentioned solid electrolyte body in the front of this heat insulation layer formation cylindrical portion, and said elements rolls oblique abutting part (14d) and is connected to the inclined plane (34d) comprising vertical component；
Base end side abutting part (16,16c, 16e), the base end side in above-mentioned heat insulation layer formation cylindrical portion is connected to the bottom surface (40) of above-mentioned grommet；
Conducting portion (12,12b～12e, 12h), flexibly abuts with said reference electrode layer, it is achieved conducting；And
Pressure contact portion (10,10g, 10h), crimps fixing by the heart yearn (20) of above-mentioned holding wire,
It is provided with the adiabatic space portion (SP that will isolate between above-mentioned grommet (4) with above-mentioned gas sensor element (3) and connect with above-mentioned passage (52)TI)。
2. gas sensor according to claim 1, it is characterised in that
In above-mentioned terminal fittings (1,1b～1h), above-mentioned heat insulation layer formation cylindrical portion is formed as the local breach tubular that diameter is bigger than the inner circumferential footpath of above-mentioned solid electrolyte body, further, the base end side end face of above-mentioned solid electrolyte body make as above-mentioned planar portions said elements side abutting part abut.
3. gas sensor according to claim 1, it is characterised in that
Above-mentioned gas sensor element, in being arranged at the signal extraction portion of base end side of above-mentioned solid electrolyte body, be provided with as above-mentioned planar portions the diameter of base end side so that the diameter of the front of inner peripheral surface is little big in the way of the stage portion (34c) of periodically diameter change
A part for the above-mentioned heat insulation layer formation cylindrical portion of above-mentioned terminal fittings (1c) is pressed into as above-mentioned conducting portion to the inner side of above-mentioned solid electrolyte body, and, above-mentioned conducting portion is elastic diametrically from inner side to be pressed above-mentioned inner peripheral surface and realizes and the conducting of said reference electrode layer, and said elements side abutting part is connected to above-mentioned stage portion and presses in the axial direction.
4. gas sensor according to claim 1, it is characterised in that
Above-mentioned gas sensor element, at the opening of the signal extraction portion of the base end side being arranged at above-mentioned solid electrolyte body, possesses the inclined plane that the diameter towards base end side becomes larger,
Between above-mentioned heat insulation layer formation cylindrical portion (15d) and above-mentioned conducting portion (12d) of above-mentioned terminal fittings (1d), it is provided with said elements and rolls oblique abutting part (14d), make said elements roll oblique abutting part and be connected to above-mentioned inclined plane (34d).
5. gas sensor according to claim 1, it is characterised in that
Above-mentioned gas sensor element, signal extraction portion (33e) at the base end side being formed at solid electrolyte body will be formed in the extended outer peripheral face to solid electrolyte body of reference electrode layer of the inner peripheral surface of solid electrolyte body, and, a part for the above-mentioned heat insulation layer formation cylindrical portion of above-mentioned terminal fittings (1e) is flush-mounted in as above-mentioned conducting portion the outer peripheral face of above-mentioned solid electrolyte body
Above-mentioned conducting portion, from outside, elasticity presses above-mentioned outer peripheral face and realizes and the conducting of said reference electrode layer diametrically, and the stage portion of the periphery being arranged on above-mentioned signal extraction portion (33e) makes as above-mentioned planar portions (34e) said elements side abutting part abut.
6. gas sensor according to any one of claim 1 to 4, it is characterised in that
Front at the above-mentioned conducting portion of above-mentioned terminal fittings (1f), being provided with the 2nd conducting portion (18), the varying diameter portion of the internal diameter undergauge of above-mentioned solid electrolyte body is being connected to said reference electrode layer by the 2nd conducting portion (18).
7. gas sensor according to any one of claim 1 to 6, it is characterised in that
What be formed as the above-mentioned base end side abutting part (16) of the above-mentioned heat insulation layer formation cylindrical portion of above-mentioned terminal fittings (1g) stretching out diametrically is flange shape.
8. gas sensor according to any one of claim 1 to 7, it is characterised in that
Above-mentioned pressure contact portion (10) is disposed in the position than the conducting portion of above-mentioned terminal fittings (12,12b, 12d, 12e) forward side.
9. gas sensor according to any one of claim 1 to 7, it is characterised in that
Above-mentioned pressure contact portion (10g) is disposed in than above-mentioned heat insulation layer formation cylindrical portion (15g) position by base end side.
10. gas sensor according to any one of claim 1 to 7, it is characterised in that
Above-mentioned pressure contact portion (10h) is disposed between above-mentioned heat insulation layer formation cylindrical portion (15) and above-mentioned conducting portion (12h).
11. gas sensor according to any one of claim 1 to 10, it is characterised in that
Between the signal lead division of above-mentioned housing and above-mentioned gas sensor element, clamp front and the tubular elastomeric element (60) of above-mentioned waterproof filter, using the outer peripheral face of above-mentioned signal lead division as the back side and be radially oriented central side compress the central diameter portion of above-mentioned housing to arrange ca(u)lk portion and be fixed time, above-mentioned tubular elastomeric element (60) is arranged in the inner part than above-mentioned waterproof filter (61).
12. gas sensor according to any one of claim 1 to 10, it is characterised in that
Between the signal lead division of above-mentioned housing and above-mentioned gas sensor element, clamp front and the tubular elastomeric element (60) of above-mentioned waterproof filter, using the outer peripheral face of above-mentioned signal lead division as the back side and be radially oriented central side compress the central diameter portion of above-mentioned housing to arrange ca(u)lk portion and be fixed time, above-mentioned waterproof filter (61) is arranged in the inner part than above-mentioned tubular elastomeric element (60).
13. the gas sensor according to any one of claim 1 to 12, it is characterised in that
Will be formed in the large-diameter portion of the front of above-mentioned housing (50) and be flush-mounted in the boss portion (74) of above-mentioned cover body, weld part (56) is set and has sealed airtightly.
14. the gas sensor according to any one of claim 1 to 12, it is characterised in that
In the front end in the central diameter portion of above-mentioned housing, it is provided with the casing ledge portion (56i) radially with shape for hat extension, and has carried out ca(u)lk by the ca(u)lk portion of above-mentioned cover body together with seal member (64) and fix.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013239479A JP6287098B2 (en) | 2013-11-20 | 2013-11-20 | Gas sensor |
| JP2013-239479 | 2013-11-20 | ||
| PCT/JP2014/079668 WO2015076131A1 (en) | 2013-11-20 | 2014-11-10 | Gas sensor |
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| Publication Number | Publication Date |
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| CN105745532A true CN105745532A (en) | 2016-07-06 |
| CN105745532B CN105745532B (en) | 2018-06-29 |
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| CN201480063518.8A Active CN105745532B (en) | 2013-11-20 | 2014-11-10 | Gas sensor |
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| Country | Link |
|---|---|
| JP (1) | JP6287098B2 (en) |
| CN (1) | CN105745532B (en) |
| WO (1) | WO2015076131A1 (en) |
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| US20210247339A1 (en) * | 2018-06-08 | 2021-08-12 | Ngk Spark Plug Co., Ltd. | Ceramic member unit and sensor provided with same |
Families Citing this family (2)
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| JP7082922B2 (en) * | 2018-08-03 | 2022-06-09 | 日本碍子株式会社 | Sensor element |
| JP7186131B2 (en) * | 2019-05-16 | 2022-12-08 | 株式会社Soken | gas sensor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105745532B (en) | 2018-06-29 |
| JP6287098B2 (en) | 2018-03-07 |
| WO2015076131A1 (en) | 2015-05-28 |
| JP2015099110A (en) | 2015-05-28 |
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