JPH0443721Y2 - - Google Patents
Info
- Publication number
- JPH0443721Y2 JPH0443721Y2 JP1985057710U JP5771085U JPH0443721Y2 JP H0443721 Y2 JPH0443721 Y2 JP H0443721Y2 JP 1985057710 U JP1985057710 U JP 1985057710U JP 5771085 U JP5771085 U JP 5771085U JP H0443721 Y2 JPH0443721 Y2 JP H0443721Y2
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- external electrode
- electrode lead
- sintered body
- ceramic sintered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 claims description 27
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 241000587161 Gomphocarpus Species 0.000 claims description 4
- 238000005219 brazing Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Description
「産業上の利用分野」
本考案は、セラミツクグロープラグの外部電極
取り出し線取付け構造に関するものである。
「従来の技術」
まず、本考案の前提構造となるセラミツクグロ
ープラグについて第１図および第２図に基づき説
明する。
棒状セラミツク焼結体１中にＵ字状の発熱抵抗
体２，３を平行状に埋設し（抵抗体３は２と重な
るため図示省略）、発熱抵抗体２，３の両端をリ
ード線２ａ，２ｂ，３ａ，３ｂを介してそれぞれ
棒状セラミツク焼結体１の外周面に位置させ、研
磨により各端部２Ａ，２Ｂ，３Ａ，３Ｂを露出さ
せる。両発熱抵抗体２，３のリード線２ａ，３ａ
の一端２Ａ，３Ａを棒状セラミツク焼結体１の後
端部に取付けた図において、上部の電極金具４に
接続し、他端２Ｂを棒状セラミツク焼結体１に外
嵌めした中間部金属管５に接続する。発熱抵抗体
３のリード線３ｂの一端３Ｂは、棒状セラミツク
焼結体１の後端部に露出させ、図において下部に
設けた電極金具１５に接続する。前記中間部金属
管５は、導体７を介して金属管６の端面に接続し
てボデイアースされている。このようにしてなる
棒状セラミツク焼結体１は、取付け金具８に内嵌
めされている。そして、棒状セラミツク焼結体１
の後端部の電極金具４，１５には、外部電極取り
出し線９，１０が接続され、外方に延出してい
る。
棒状セラミツク発熱体と外部電極取り出し線と
の接続構造として次のようなものがある。
第４図および第５図に示すように、棒状セラミ
ツク焼結体１の後端部に電極金具１１を取付け
て、発熱抵抗体の露出した端部と接続させ、その
外面に外部電極取り出し線１２を銀ロウ付けにて
接続したものである。
第６図に示すように棒状セラミツク焼結体１の
後端にキヤツプ状の電極金具１３を被せて銀ロウ
にて固着し、その後端面に外部電極取り出し線１
４の先端を当接させて、銀ロウ１６により接続し
ているものがある。
「考案が解決しようとする問題点」
しかしながら、前記棒状セラミツク発熱体と外
部電極取り出し線との接続構造では、デイーゼル
エンジンに取付けて長時間稼働させると、稼働に
伴う振動および加熱・冷却の繰り返しによるロウ
材の劣化等により接合部から外部電極取り出し線
が剥離して通電しなくなるという問題点があつ
た。
「実施例」
第３図に示すように、棒状セラミツク焼結体１
の後端部に発熱抵抗体２のリード線２ａの一端２
Ａを棒状セラミツク焼結体１の外周面に位置さ
せ、研磨して露出させてその露出部および棒状セ
ラミツク焼結体１の後端部にNi，Ti，Zr，Ｗ，
MoあるいはMn等の高融点金属粉末の単体又は
それらの化合物に有機物を添加してなるペースト
をセラミツク表面の所定位置に塗着した後、焼結
した金属被覆層であるメタライズ１７を施し、そ
のメタライズ１７の表面に、さらに、ニツケルメ
ツキ１８を施す。
次に、キヤツプの半割り状の電極金具１９の後
端面側に挿通孔２０を穿設し、ニツケルメツキ鉄
線の外部電極取り出し線２１の接合端を釘頭形状
２１ａに形成し、外部電極取り出し線２１を前記
挿通孔２０に通し、電極金具１９を銀ロウ２２に
て前記棒状セラミツク焼結体１のニツケルメツキ
１８部に固定する。
本考案と第４図ないし第６図に示す従来例との
外部電極取り出し線の引張強度を以下の方法によ
り測定した。
測定方法は、棒状セラミツク焼結体１を固定し
て外部電極取り出し線をプツシユプルケージに接
続して引張強度を測定した。その結果は次表の通
りである。
"Field of Industrial Application" The present invention relates to a structure for attaching an external electrode lead wire to a ceramic glow plug. "Prior Art" First, a ceramic glow plug, which is the basic structure of the present invention, will be explained based on FIGS. 1 and 2. U-shaped heating resistors 2 and 3 are buried in parallel in a rod-shaped ceramic sintered body 1 (resistor 3 is omitted because it overlaps with 2), and both ends of the heating resistors 2 and 3 are connected to lead wires 2a, 2b, 3a, 3b, and are respectively positioned on the outer circumferential surface of the rod-shaped ceramic sintered body 1, and the respective ends 2A, 2B, 3A, 3B are exposed by polishing. Lead wires 2a, 3a of both heating resistors 2, 3
In the figure in which one ends 2A and 3A are attached to the rear end of the rod-shaped ceramic sintered body 1, an intermediate metal tube 5 is connected to the upper electrode fitting 4 and the other end 2B is fitted onto the rod-shaped ceramic sintered body 1. Connect to. One end 3B of the lead wire 3b of the heating resistor 3 is exposed at the rear end of the rod-shaped ceramic sintered body 1 and connected to an electrode fitting 15 provided at the lower part in the figure. The intermediate metal tube 5 is connected to the end surface of the metal tube 6 via a conductor 7 and is body grounded. The rod-shaped ceramic sintered body 1 thus formed is fitted inside the mounting fitting 8. Then, the rod-shaped ceramic sintered body 1
External electrode lead lines 9 and 10 are connected to the electrode fittings 4 and 15 at the rear end and extend outward. The following is a connection structure between a rod-shaped ceramic heating element and an external electrode lead wire. As shown in FIGS. 4 and 5, an electrode fitting 11 is attached to the rear end of the rod-shaped ceramic sintered body 1 and connected to the exposed end of the heating resistor, and an external electrode lead wire 12 is attached to the outer surface of the electrode fitting 11. are connected using silver brazing. As shown in FIG. 6, a cap-shaped electrode fitting 13 is placed on the rear end of the rod-shaped ceramic sintered body 1 and fixed with silver solder, and an external electrode lead wire 1 is attached to the rear end surface.
Some have their tips 4 in contact with each other and are connected by silver solder 16. ``Problems that the invention attempts to solve'' However, with the connection structure between the rod-shaped ceramic heating element and the external electrode lead wire, if it is installed in a diesel engine and operated for a long time, vibrations due to operation and repeated heating and cooling may occur. There was a problem in that the external electrode lead wires peeled off from the joint due to deterioration of the brazing material, resulting in no longer conducting current. "Example" As shown in FIG. 3, a rod-shaped ceramic sintered body 1
One end 2 of the lead wire 2a of the heating resistor 2 is attached to the rear end.
A is placed on the outer peripheral surface of the rod-shaped ceramic sintered body 1, polished to expose it, and Ni, Ti, Zr, W,
After applying a paste made of high melting point metal powder such as Mo or Mn or a compound thereof to a predetermined position on the ceramic surface, metallization 17, which is a sintered metal coating layer, is applied. Nickel plating 18 is further applied to the surface of 17. Next, an insertion hole 20 is bored in the rear end surface of the half-shaped electrode fitting 19 of the cap, and the joint end of the external electrode lead wire 21 made of nickel-plated iron wire is formed into a nail head shape 21a. is passed through the insertion hole 20, and the electrode fitting 19 is fixed to the nickel plating 18 of the rod-shaped ceramic sintered body 1 with silver solder 22. The tensile strengths of the external electrode lead wires of the present invention and the conventional example shown in FIGS. 4 to 6 were measured by the following method. The measurement method was to fix the rod-shaped ceramic sintered body 1, connect the external electrode lead wire to a push-pull cage, and measure the tensile strength. The results are shown in the table below.
【表】
本考案のセラミツクグロープラグの外部電極取
り出し線取付け構造は、従来例に比して４〜７倍
の引張強度を有することがわかる。
「考案の効果」
叙上の如く、本考案のセラミツクグロープラグ
の外部電極取り出し線取付け構造によればデイー
ゼルエンジンの苛酷な稼働による振動や加熱・冷
却の繰り返しが長期にわたつても接合部から外部
電極取り出し線が剥離したりせず、耐久性の優れ
た信頼性の高いセラミツクグロープラグを得るこ
とができる。[Table] It can be seen that the external electrode lead wire mounting structure of the ceramic glow plug of the present invention has a tensile strength 4 to 7 times that of the conventional example. ``Effects of the invention'' As mentioned above, the external electrode lead wire attachment structure of the ceramic glow plug of the present invention allows the external electrode to be connected from the joint to the outside even under the vibrations and repeated heating and cooling caused by the harsh operation of a diesel engine over a long period of time. A ceramic glow plug with excellent durability and high reliability can be obtained without peeling of the electrode lead wire.
第１図は本考案の前提構造となるセラミツクグ
ロープラグの縦断面図、第２図は第１図の−
断面図、第３図は本考案の具体的実施例の縦断面
図、第４図は従来例の正面図、第５図は第４図の
側面図、第６図は他の従来例の縦断面図である。
１……棒状セラミツク焼結体、２……発熱抵抗
体、４……電極金具、１９……電極金具、２０…
…挿通孔、２１……外部電極取り出し線、２１ａ
……釘頭形状。
Fig. 1 is a vertical cross-sectional view of a ceramic glow plug, which is the basic structure of the present invention, and Fig. 2 is a -
3 is a vertical sectional view of a specific embodiment of the present invention, FIG. 4 is a front view of a conventional example, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a longitudinal sectional view of another conventional example. It is a front view. DESCRIPTION OF SYMBOLS 1... Rod-shaped ceramic sintered body, 2... Heat generating resistor, 4... Electrode fitting, 19... Electrode fitting, 20...
...Insertion hole, 21...External electrode extraction line, 21a
...nail head shape.
Claims (1)
平行状に埋設した複数の発熱抵抗体に接続したリ
ード線の露出部を設け、該露出部に電極金具を覆
せ、該電極金具に外部電極取り出し線をセラミツ
ク焼結体後端面側でロウ接する構造において、前
記外部電極取り出し線の接合端を釘頭形状に形成
すると共に、２個の電極金具にそれぞれ外部電極
取り出し線の挿通孔を設け、該外部電極取り出し
線を該挿通孔に通し、２個の電極金具をセラミツ
ク焼結体の後端面のメタライズ層を施した面との
間に前記外部電極取り出し線の釘頭部分を挟んだ
状態でそれぞれロウ接することを特徴とするセラ
ミツクグロープラグの外部電極取り出し線取付け
構造。 An exposed portion of a lead wire connected to a plurality of heating resistors buried in parallel in the sintered body is provided at the rear end of the rod-shaped ceramic sintered body, and an electrode fitting is covered with the exposed portion. In the structure in which the external electrode lead wire is soldered to the rear end surface of the ceramic sintered body, the joint end of the external electrode lead wire is formed into a nail head shape, and an insertion hole for the external electrode lead wire is formed in each of the two electrode fittings. The external electrode lead wire was passed through the insertion hole, and the nail head portion of the external electrode lead wire was sandwiched between two electrode fittings and the metallized layer of the rear end surface of the ceramic sintered body. This is an external electrode lead wire attachment structure for a ceramic glow plug, which is characterized by brazing in each state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985057710U JPH0443721Y2 (en) | 1985-04-17 | 1985-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985057710U JPH0443721Y2 (en) | 1985-04-17 | 1985-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61175754U JPS61175754U (en) | 1986-11-01 |
| JPH0443721Y2 true JPH0443721Y2 (en) | 1992-10-15 |
Family
ID=30582495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985057710U Expired JPH0443721Y2 (en) | 1985-04-17 | 1985-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0443721Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015064598A1 (en) * | 2013-10-28 | 2015-05-07 | 京セラ株式会社 | Heater and glow plug |
| WO2015129722A1 (en) * | 2014-02-26 | 2015-09-03 | 京セラ株式会社 | Heater and glowplug |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0311574Y2 (en) * | 1985-10-21 | 1991-03-20 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57155026A (en) * | 1981-02-07 | 1982-09-25 | Bosch Gmbh Robert | Glow plug for internal combustion engine |
| JPS6012063B2 (en) * | 1976-02-27 | 1985-03-29 | ハンネス マ−カ− | Heel retainer for safety ski binding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58194359U (en) * | 1982-06-16 | 1983-12-24 | トヨタ自動車株式会社 | glow plug |
| JPS6012063U (en) * | 1983-06-30 | 1985-01-26 | 自動車機器株式会社 | Glow plug for diesel engine |
-
1985
- 1985-04-17 JP JP1985057710U patent/JPH0443721Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6012063B2 (en) * | 1976-02-27 | 1985-03-29 | ハンネス マ−カ− | Heel retainer for safety ski binding |
| JPS57155026A (en) * | 1981-02-07 | 1982-09-25 | Bosch Gmbh Robert | Glow plug for internal combustion engine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015064598A1 (en) * | 2013-10-28 | 2015-05-07 | 京セラ株式会社 | Heater and glow plug |
| JP6075810B2 (en) * | 2013-10-28 | 2017-02-08 | 京セラ株式会社 | Heater and glow plug |
| WO2015129722A1 (en) * | 2014-02-26 | 2015-09-03 | 京セラ株式会社 | Heater and glowplug |
| JPWO2015129722A1 (en) * | 2014-02-26 | 2017-03-30 | 京セラ株式会社 | Heater and glow plug |
| EP3113575A4 (en) * | 2014-02-26 | 2017-10-11 | Kyocera Corporation | Heater and glowplug |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61175754U (en) | 1986-11-01 |
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