CN204065009U - A kind of lambda sensor - Google Patents
A kind of lambda sensor Download PDFInfo
- Publication number
- CN204065009U CN204065009U CN201420321028.0U CN201420321028U CN204065009U CN 204065009 U CN204065009 U CN 204065009U CN 201420321028 U CN201420321028 U CN 201420321028U CN 204065009 U CN204065009 U CN 204065009U
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- Prior art keywords
- hole
- sealing
- lambda sensor
- sealed liner
- supporter
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Abstract
The utility model discloses a kind of lambda sensor, comprise pedestal and be sleeved on the shell in base outer wall, also comprise sealed liner, packing washer, sealing block and sensing element, pedestal is provided with a through hole, and the inwall of through hole is provided with an annular step; The inner wall sealing interference fit of sealed liner and described through hole, packing washer pressing is arranged between the bottom of sealed liner and annular step, and sealed liner is provided with sealing through hole, the inner wall sealing interference fit of sealing block and described sealing through hole; Sealing block is provided with mounting hole, and sensing element seals and is fixedly located in described mounting hole.The utility model not only has excellent sealing property, and structural stability is good, enormously simplify production technology, reduces production cost.
Description
Technical field
The utility model relates to sensor, particularly relates to a kind of lambda sensor.
Background technology
Automotive oxygen sensor, also known as air-fuel ratio sensor, it is the important key components and parts of formed automobile engine electric spray system, general vehicle is arranged near enmgine exhaust (engine cylinder-body side) that behind position and ternary catalyzing unit each one of position, is called front lambda sensor and post oxygen sensor.The function of lambda sensor itself is the oxygen concentration that can detect certain limit, by judging that the oxygen content in motor exhaust obtains a signal value, this signal value is transferred to the central control unit (ECU) of electric injection system.Then ECU comprehensively comprises the vehicle condition signal be necessary of oxygen sensor signal, carry out supercomputing and coupling, the performance element exporting to electric injection system carries out the operation control of engine, make to fluctuate in the air-fuel ratio of engine scope very narrow near 14.7:1 all the time, for the maximization of vehicle exhaust three-way emission control efficiency provides condition guarantee.
Now widely used automotive oxygen sensor is concentration difference type Zirconium oxide oxygen sensor, is divided into tubular type and chip two kinds according to the difference of its core original paper pattern.Chip oxygen sensor develops recent years and occupies the lambda sensor of new generation of mainstream market gradually, because it is integrated with induction and heating two parts, the start-up time of sensor is shortened greatly, thus makes it more be applicable to the stricter emission limit control technology requirement of the Europe fourth class.Principle of work due to lambda sensor is that concentration difference contrasts the nernst equation magnitude of voltage obtained, so very high for the insulation request of contrast_environment, and the manufacturing process of current chip oxygen sensor or process complexity ensures its impermeability, requirement is reached by designing extra control circuit, these technology not only bad for the industrialization of product and universalization, and create adverse influence to the structure of product itself.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of lambda sensor, not only has excellent sealing property, and structural stability is good, enormously simplify production technology, reduces production cost.
For solving the problems of the technologies described above, the utility model proposes a kind of lambda sensor, comprise pedestal and be sleeved on the shell in base outer wall, also comprise sealed liner, packing washer, sealing block and sensing element, described pedestal is provided with a through hole, and the inwall of described through hole is provided with an annular step; The inner wall sealing interference fit of described sealed liner and described through hole, described packing washer pressing is arranged between the bottom of sealed liner and annular step, described sealed liner is provided with sealing through hole, the inner wall sealing interference fit of described sealing block and described sealing through hole; Described sealing block is provided with mounting hole, and described sensing element seals and is fixedly located in described mounting hole.
Further, the upper surface of described packing washer and lower surface are globoidal structure, and the surface configuration of described annular step coordinates with the lower surface of packing washer, and the bottom shape of described sealed liner coordinates with the upper surface of packing washer.
Further, also comprise little supporter and large supporter, the bottom of described through hole is provided with an annular boss, and the top of described through hole is provided with a riveting and hooks, and the two ends of described little supporter are connected between described annular boss and the bottom of sealing block respectively; Described one end of large supporter abuts with the top of sealed liner, and the other end is clamped in described riveting hook; Described little supporter and large supporter are equipped with the through hole mated with mounting hole, and described sensing element is located in described through hole.
Further, the bottom of described pedestal is respectively equipped with outer shield and is contained in the interior guard shield of described outer shield inside, and the sidewall of described outer shield and interior guard shield is equipped with air hole.
Preferably, described sealed liner is that metal material is made.
Preferably, described sealing block is that talcum powder material is made.
Preferably, described pedestal is hexagonal pedestal.
Preferably, described little supporter and large supporter are stupalith and make.
Technique scheme at least has following beneficial effect: the utility model makes sealing block by advance talcum powder being adopted dry method high pressure, sealing block surrounds sensing element and directly closely in embedding sealing liner, make a formed combination body, can directly obtain sealing property good around sensing element, it also avoid the risk that conventional online assembling pressing process Intermediate High Pressure breaks sensing element simultaneously; The upper surface of packing washer and lower surface are set to globoidal structure, and pressing is arranged on bottom sealed liner and between annular step, compensate for the defect that above-mentioned sealed liner outer wall is poorly sealed, further enhancing the sealing property of lambda sensor entirety; The utility model not only has excellent sealing property, and structural stability is good, does not need the semi-manufacture pyroprocessing workshop section of common process, avoid the adverse effect that pyroprocessing workshop section brings production run and product quality, enormously simplify production technology, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structure cut-open view of the utility model lambda sensor.
Fig. 2 is the enlarged drawing at A place in Fig. 1.
Fig. 3 is the enlarged drawing at B place in Fig. 1.
Fig. 4 is the cross-sectional view of sealed liner in the utility model lambda sensor.
Cross-sectional view when Fig. 5 is sealed liner and sealing block assembling in the utility model lambda sensor.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figures 1 to 5, the lambda sensor of the utility model embodiment, comprises pedestal 1, shell 2, sealed liner 3, packing washer 4, sealing block 5, sensing element 6, little supporter 7, large supporter 8, outer shield 100 and interior guard shield 200.Wherein, pedestal 1 is hexagonal pedestal, pedestal 1 is provided with a through hole 11, the inwall of through hole 11 is provided with an annular step 12, the bottom of through hole 11 is provided with an annular boss 13, the top of through hole 11 is provided with a riveting and hooks 14, the bottom of pedestal 1 is respectively equipped with outer shield 100 and is contained in the interior guard shield 200 of outer shield 100 inside, the sidewall of outer shield 100 and interior guard shield 200 is equipped with air hole 300, adopt the double-deck shield structure of outer shield 100 and interior guard shield 200, available protecting can be carried out to sensing element 6; Shell 2 is sleeved on the outer wall of pedestal 1, protects sensing element 6; Sealed liner 3 is made up of metal material, the inner wall sealing interference fit of sealed liner 3 and through hole 11, and sealed liner 3 is provided with sealing through hole 31, sealing block 5 and the inner wall sealing interference fit sealing through hole 31; Packing washer 4 pressing is arranged between the bottom of sealed liner 3 and annular step 12, the upper surface of packing washer 4 and lower surface are globoidal structure, the surface configuration of annular step 12 coordinates with the lower surface of packing washer 4, and the bottom shape of sealed liner 3 coordinates with the upper surface of packing washer 4; Sealing block 5 is made for talcum powder material, and sealing block 5 is provided with mounting hole 51, and sensing element 6 seals and is fixedly located in mounting hole 51; Little supporter 7 and large supporter 8 are stupalith and make, and the two ends of little supporter 7 are connected between the bottom of annular boss 13 and sealing block 5 respectively; One end of large supporter 8 abuts with the top of sealed liner 3, the other end is clamped on riveting and hooks in 14, little supporter 7 and large supporter 8 are equipped with the through hole 9 mated with mounting hole 51, sensing element 6 is located in through hole 9, and the lower end of sensing element 6 is stretched in interior guard shield 200 through through hole 9, sensing element 6 is better contacted with tail gas, responds to sensitiveer.
When assembling, sealing block 5 and sensing element 6 are combined closely, and ensure that the sealing property around sensing element 6; Sealing block 5 is combined closely with the inner side of sealed liner 3, effectively ensure that the sealing property inside sealed liner 3; Carry out riveting ensure that packing washer 4 fits tightly with the bottom of adjacent seals liner 3 and annular step 12 respectively by hooking 14 to riveting while applying high-pressure to large supporter 8, thus ensure that the air-tightness of sealed liner 3 lateral wall.
As another kind of embodiment, can also arrange a step surface extended to axis direction on the upper end sidewall of large supporter 8, when such riveting hook 14 carries out riveting, step surface can play position-limiting action, curved transitions when avoiding riveting to hook 14 riveting, cause riveting to hook 14 to be fractureed, and can according to different demands, the degree of tilt of adjustment step surface, because degree of tilt is different, riveting hooks the degree of crook difference of 14, and the pressure causing packing washer 4 to be subject to is different, reaches the effect of riveting pressure adjustable.
The manufacture method of the utility model lambda sensor, comprises the following steps:
(1), by talcum powder adopt dry method high pressure to make sealing block 5, sealing block 5 in direct closely embedding sealing liner 3, makes a formed combination body after surrounding sensing element 6;
(2), described little supporter 7, packing washer 4, formed combination body and large supporter 8 are combined successively be arranged in through hole 11, then large supporter 8 is withstood by axle pressure, pressure is delivered on packing washer 4 by sealed liner 3, the bottom of the upper surface of packing washer 4 and sealed liner 3 is fitted tightly, the bottom of the lower surface of packing washer 4 and sealed liner 3 is fitted tightly;
(3), compress riveting hook 14, make packing washer 4 pressure remain in pedestal 1;
(4), successively shell 2, interior guard shield 200 and outer shield 100 are arranged on pedestal 1 respectively.
Particularly, the material talc powder of sensing element 6 and sealing block 5 and sealed liner 3 are carried out the direct dry method compacting under 3 tons of pressure by special mould, form shaping subassembly, now because steatite ceramics powder can contact with the intimate of sensing element 6 in a high voltage state, simultaneously with the inside surface close contact of sealed liner 3, thus ensure that these two positions can not produce gas leak phenomenon, and the air-tightness of shaped article sealing block 5 made under the high pressure conditions of 3 tons of pressure of steatite ceramics powder become very excellent.
Then the through hole 11 that little supporter 7, packing washer 4, formed combination part and large supporter 8 put into pedestal 1 is successively formed occasional combination suit, this combined complete is put into press-loading device frock, the bottom of frock has put into guard shield 200 and outer shield 100 in advance, then continue to push down large supporter 8 by axle pressure push rod, simultaneously hook 14 in the tight riveting of another group pressure.This technique make packing washer 4 complete with assembling in an assembling process after be in tensioning state all always, thus ensure that itself and adjacent seals liner 3 and annular step 12 fit tightly, coordinate adjacent contact face to be in the design feature of arcwall face contact, make lambda sensor product have good hermetic properties in this region.
The utility model makes sealing block 5 by advance talcum powder being adopted dry method high pressure, sealing block 5 surrounds sensing element 6 and directly closely in embedding sealing liner 3, make a formed combination body, can directly obtain sealing property good around sensing element 6, it also avoid the risk that conventional online assembling pressing process Intermediate High Pressure breaks sensing element 6 simultaneously; The upper surface of packing washer 4 and lower surface are set to globoidal structure, and pressing is arranged on bottom sealed liner 3 and between annular step 12, compensate for the defect that above-mentioned sealed liner 3 outer wall is poorly sealed, further enhancing the sealing property of lambda sensor entirety; The utility model not only has excellent sealing property, and structural stability is good, does not need the semi-manufacture pyroprocessing workshop section of common process, avoid the adverse effect that pyroprocessing workshop section brings production run and product quality, enormously simplify production technology, reduce production cost.
The above is embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (8)
1. a lambda sensor, comprise pedestal and be sleeved on the shell in base outer wall, it is characterized in that, also comprise sealed liner, packing washer, sealing block and sensing element, described pedestal is provided with a through hole, and the inwall of described through hole is provided with an annular step; The inner wall sealing interference fit of described sealed liner and described through hole, described packing washer pressing is arranged between the bottom of sealed liner and annular step, described sealed liner is provided with sealing through hole, the inner wall sealing interference fit of described sealing block and described sealing through hole; Described sealing block is provided with mounting hole, and described sensing element seals and is fixedly located in described mounting hole.
2. lambda sensor as claimed in claim 1, it is characterized in that, the upper surface of described packing washer and lower surface are globoidal structure, and the surface configuration of described annular step coordinates with the lower surface of packing washer, and the bottom shape of described sealed liner coordinates with the upper surface of packing washer.
3. lambda sensor as claimed in claim 1, it is characterized in that, also comprise little supporter and large supporter, the bottom of described through hole is provided with an annular boss, the top of described through hole is provided with a riveting and hooks, and the two ends of described little supporter are connected between described annular boss and the bottom of sealing block respectively; Described one end of large supporter abuts with the top of sealed liner, and the other end is clamped in described riveting hook; Described little supporter and large supporter are equipped with the through hole mated with mounting hole, and described sensing element is located in described through hole.
4. lambda sensor as claimed in claim 1, it is characterized in that, the bottom of described pedestal is respectively equipped with outer shield and is contained in the interior guard shield of described outer shield inside, and the sidewall of described outer shield and interior guard shield is equipped with air hole.
5. lambda sensor as claimed in claim 1, it is characterized in that, described sealed liner is that metal material is made.
6. lambda sensor as claimed in claim 1, it is characterized in that, described sealing block is that talcum powder material is made.
7. lambda sensor as claimed in claim 1, it is characterized in that, described pedestal is hexagonal pedestal.
8. lambda sensor as claimed in claim 3, it is characterized in that, described little supporter and large supporter are stupalith and make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420321028.0U CN204065009U (en) | 2014-06-16 | 2014-06-16 | A kind of lambda sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420321028.0U CN204065009U (en) | 2014-06-16 | 2014-06-16 | A kind of lambda sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204065009U true CN204065009U (en) | 2014-12-31 |
Family
ID=52206495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420321028.0U Withdrawn - After Issue CN204065009U (en) | 2014-06-16 | 2014-06-16 | A kind of lambda sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204065009U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020211A (en) * | 2014-06-16 | 2014-09-03 | 深圳市普利斯通传感科技有限公司 | Oxygen sensor and manufacturing method |
| CN106369246A (en) * | 2016-10-18 | 2017-02-01 | 北京空间技术研制试验中心 | Pneumatic measuring sensor heat seal method |
-
2014
- 2014-06-16 CN CN201420321028.0U patent/CN204065009U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020211A (en) * | 2014-06-16 | 2014-09-03 | 深圳市普利斯通传感科技有限公司 | Oxygen sensor and manufacturing method |
| CN106369246A (en) * | 2016-10-18 | 2017-02-01 | 北京空间技术研制试验中心 | Pneumatic measuring sensor heat seal method |
| CN106369246B (en) * | 2016-10-18 | 2018-12-25 | 北京空间技术研制试验中心 | Pneumatic gauging sensor heat-sealing processes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20170815 |
|
| AV01 | Patent right actively abandoned |