CN-224231733-U - Gas sensor packaging structure

CN224231733UCN 224231733 UCN224231733 UCN 224231733UCN-224231733-U

Abstract

The utility model relates to a gas sensor packaging structure which comprises a waste gas cover, a base, packaging ceramics, a powder pressing sheet, T-shaped ceramics, an outer metal protection sleeve, an inner metal protection sleeve and a waterproof breathable film, wherein the waste gas cover comprises an inner waste gas cover and an outer waste gas cover, the inner waste gas cover is fixedly connected with the outer waste gas cover through spot welding, the outer waste gas cover is fixedly connected to one end of the base through spot welding and is communicated with an inner hole of the base, the packaging ceramics, the powder pressing sheet and the T-shaped ceramics are sequentially arranged in the inner hole of the base, through holes for allowing a chip core to pass are formed in the centers of the packaging ceramics, the powder pressing sheet and the T-shaped ceramics, the end of the inner metal protection sleeve is riveted at the tail position of the base, the outer metal protection sleeve is sleeved on the inner metal protection sleeve and is riveted and fixed with the inner metal protection sleeve, and the waterproof breathable film is wrapped on the outer wall of the inner metal protection sleeve. The metal protection sleeve has the advantage that the metal deformation caused by welding heat is avoided by adopting a riveting connection structure.

Inventors

WANG LI
WANG DAYONG
DUAN WEI
PANG CHUNLEI
SUN LIPING

Assignees

长春一汽富维汽车零部件股份有限公司

Dates

Publication Date: 20260512
Application Date: 20250417

Claims (10)

1. A gas sensor packaging structure is characterized by comprising an exhaust hood, a base, packaging ceramics, a powder pressing sheet, T-shaped ceramics, an outer metal protection sleeve, an inner metal protection sleeve and a waterproof breathable film, wherein the exhaust hood comprises an inner exhaust hood and an outer exhaust hood, the inner exhaust hood is fixedly connected with the outer exhaust hood through spot welding, the outer exhaust hood is fixedly connected with one end of the base through spot welding and communicated with an inner hole of the base, the packaging ceramics, the powder pressing sheet and the T-shaped ceramics are sequentially arranged in the inner hole of the base, the packaging ceramics are positioned at one end close to the exhaust hood, through holes for a chip core to penetrate are formed in the centers of the packaging ceramics, the powder pressing sheet and the T-shaped ceramics, the chip core sequentially penetrates through the packaging ceramics, the powder pressing sheet and stretches into the exhaust hood, a bulge is arranged at one end close to the powder, the tail end of the inner metal protection sleeve is riveted at the position of the base, the outer metal protection sleeve is riveted and fixed with the inner metal protection sleeve, and the waterproof breathable film is wrapped on the outer wall of the inner metal protection sleeve and positioned between the inner metal protection sleeve and the outer metal protection sleeve.
2. The gas sensor packaging structure according to claim 1, wherein a plurality of air inlets are uniformly distributed on the cylinders of the inner exhaust gas cover and the outer exhaust gas cover, the air inlets on the inner exhaust gas cover and the air inlets on the outer exhaust gas cover are arranged in a staggered manner, air outlets are formed in the end positions of the inner exhaust gas cover and the outer exhaust gas cover, and the positions of the air outlets are the same.
3. The gas sensor package structure according to claim 1, wherein the inner hole of the T-shaped ceramic close to one end of the powder pressing sheet is a conical hole.
4. The gas sensor packaging structure according to claim 1, wherein one end of the T-shaped ceramic, which is far away from the powder pressing sheet, is provided with a terminal mounting hole communicated with the chip core through hole, a wiring terminal is arranged in the terminal mounting hole, and a position, which is close to the T-shaped ceramic, in the outer metal protection sleeve is provided with a fixing ceramic for fixing the wiring terminal, a positioning block and a connecting wire.
5. The gas sensor packaging structure according to claim 1, wherein a first butterfly gasket is arranged between the shoulder of the front end of the T-shaped ceramic and the base step, a second butterfly gasket is arranged between the shoulder of the rear end of the T-shaped ceramic and the inner metal protective sleeve, and the first butterfly gasket and the second butterfly gasket are elastic gaskets.
6. The gas sensor package according to claim 1, wherein a package spacer is provided between the inner metal protective sleeve and the riveted turned edge of the tail portion of the base.
7. The gas sensor package according to claim 1, wherein the outer metal protective sleeve and the inner metal protective sleeve are provided with air holes.
8. The gas sensor packaging structure according to claim 7, wherein the air hole is located at the tail portions of the outer metal protection sleeve and the inner metal protection sleeve, a rubber sealing plug is arranged at one end, far away from the T-shaped ceramic, of the outer metal protection sleeve, and wire through holes matched with the connecting wires in number are formed in the rubber sealing plug.
9. The gas sensor package according to claim 1, wherein the outer wall of the base is hexagonal.
10. The gas sensor package according to claim 1, wherein the T-shaped ceramic has a mark point groove for identifying a direction provided on an outer wall thereof.

Description

Gas sensor packaging structure Technical Field The utility model relates to the technical field of automobile sensors, in particular to a gas sensor packaging structure. Background The gas sensor is used as an important component for automobile exhaust gas inspection, the existing gas sensor is mainly welded, a large amount of heat is generated during welding, metal deformation is easy to occur, and the ceramic opening contacted with powder during packaging is small in size, so that the powder is not easy to fill into holes, sealing problems are easy to occur, and poor air tightness is caused. Disclosure of utility model In view of the above, it is an object of the present utility model to provide a gas sensor package structure for reducing metal deformation caused by welding and further improving the waterproof and air permeability of the sensor to overcome the above-mentioned drawbacks of the prior art. The utility model provides a gas sensor packaging structure which comprises a waste gas cover, a base, packaging ceramics, powder pressing sheets, T-shaped ceramics, an outer metal protection sleeve, an inner metal protection sleeve and a waterproof breathable film, wherein the waste gas cover comprises an inner waste gas cover and an outer waste gas cover, the inner waste gas cover is fixedly connected with the outer waste gas cover through spot welding, the spot welding positions are four spot welding hole positions of one side end heads of the inner waste gas cover and the outer waste gas cover, the outer waste gas cover is fixedly connected with one end of the base through spot welding and is communicated with an inner hole of the base, the packaging ceramics, the powder pressing sheets and the T-shaped ceramics are sequentially arranged in the inner hole of the base, the packaging ceramics are positioned at one end close to the waste gas cover, through holes for a chip core to penetrate through are formed in the packaging ceramics, the powder pressing sheets and the T-shaped ceramics, one end of the packaging ceramics, which is close to the powder pressing sheets, is provided with a bulge, the end heads of the inner metal protection sleeve are riveted at the tail position of the base, the outer metal protection sleeve is sleeved on the outer metal protection sleeve and is fixedly connected with the outer metal protection sleeve, and is positioned between the inner metal protection sleeve and the outer metal protection sleeve. As the preferable mode of the invention, the cylinders of the inner exhaust gas cover and the outer exhaust gas cover are uniformly provided with a plurality of air inlets, the air inlets on the inner exhaust gas cover and the air inlets on the outer exhaust gas cover are arranged in a staggered mode, the end positions of the inner exhaust gas cover and the outer exhaust gas cover are respectively provided with an air outlet, and the positions of the air outlets are the same. As the preferable mode of the invention, the inner hole of the T-shaped ceramic close to one end of the powder pressing sheet is a conical hole. As the preferable mode of the invention, one end of the T-shaped ceramic far away from the powder pressing sheet is provided with a terminal mounting hole communicated with the sheet core through hole, a wiring terminal is arranged in the terminal mounting hole, and a fixed ceramic, a positioning block and a connecting wire for fixing the wiring terminal are arranged at the position, close to the T-shaped ceramic, in the outer metal protection sleeve. As the preferable mode of the invention, a first butterfly-shaped gasket is arranged between the shoulder of the front end of the T-shaped ceramic and the step of the base, a second butterfly-shaped gasket is arranged between the shoulder of the rear end of the T-shaped ceramic and the inner metal protection sleeve, and the first butterfly-shaped gasket and the second butterfly-shaped gasket are elastic gaskets. As the preferable mode of the invention, a packaging gasket is arranged between the inner metal protection sleeve and the riveting turnover edge of the tail part of the base. As the preferable mode of the invention, the outer metal protection sleeve and the inner metal protection sleeve are respectively provided with air holes. As the preferable mode of the invention, the air hole is positioned at the tail parts of the outer metal protective sleeve and the inner metal protective sleeve, one end, far away from the T-shaped ceramic, of the outer metal protective sleeve is provided with a rubber sealing plug, and the rubber sealing plug is provided with wire through holes, the number of which is matched with that of the connecting wires. Preferably, the outer wall of the base is hexagonal. Preferably, the outer wall of the T-shaped ceramic is provided with a mark point groove for identifying the direction. The utility model has the advantages that: 1. According to the utility model, the metal protection sleeve is