CN214887350U - Sensing needle device with back-off mechanism - Google Patents
Sensing needle device with back-off mechanism Download PDFInfo
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- CN214887350U CN214887350U CN202121429515.5U CN202121429515U CN214887350U CN 214887350 U CN214887350 U CN 214887350U CN 202121429515 U CN202121429515 U CN 202121429515U CN 214887350 U CN214887350 U CN 214887350U
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Abstract
The utility model discloses a sensing needle device with a back-off mechanism, which comprises an upper kettle body and a lower kettle body, wherein the upper kettle body is connected with a sensing needle; the upper kettle body is provided with a mounting part for connecting the sensing needle, the mounting part is provided with a mounting hole, the sensing needle is longitudinally provided with a plurality of layers of fixing structures along the central axis thereof, and the fixing structures are a plurality of back-off claws arranged on the sensing needle; the sensing needle is pressed into the mounting hole, the sensing needle is in interference fit with the lower end of the mounting hole, the reversing claw on the sensing needle is embedded into the upper end of the mounting hole, the sensing needle is sleeved with the sealing ring and the sealing spring, the sealing ring and the sealing spring are located in the mounting hole, the upper end of the sealing spring is abutted against the reversing claw, the lower end of the sealing spring is abutted against the sealing ring, and the elastic force of the sealing spring acts on the sealing ring to enable the sensing needle and the mounting hole to be kept in sealing connection. The utility model discloses make the connection of sensing needle more firm, the leakproofness is better, effectively avoid appearing not hard up and lead to the condition of leaking.
Description
Technical Field
The utility model belongs to the technical field of inflation kettle liquid level monitoring, concretely relates to sensing needle device with back-off mechanism.
Background
The expansion kettle is also called as a cooling liquid kettle, and is an important component of an automobile engine cooling system, at present, most cooling kettles realize alarm feedback on too little cooling liquid in the kettle through a liquid level sensor, and the problems of poor engine cooling and the like caused by too little cooling liquid in the kettle are solved. However, the installation of the liquid level sensor needs to arrange a metal insert connected with the kettle body, and the connection tightness between the liquid level sensor and the copper insert and between the copper insert and the kettle body are difficult to guarantee, so that the leakage condition is easy to occur.
Therefore, the sensing needle is adopted for replacement, the end part of the sensing needle is positioned in the cooling liquid to form a normal electrifying loop, the external sensor connected with the sensing needle is electrified and cannot give an alarm, when the cooling liquid is too little and is lower than the warning limit, the end part of the sensing needle can expose the cooling liquid, and at the moment, the external sensor can disconnect a circuit and give an alarm; however, the installation and connection between the sensing needle and the kettle body are not firm enough, and the situation of looseness and leakage is easy to occur.
Disclosure of Invention
The utility model discloses a solve the problem that proposes among the above-mentioned background art, provide a sensing needle device with back-off mechanism, effectively improve the steadiness that sensing needle and kettle body are connected, the leakproofness of guaranteeing to be connected.
In order to achieve the above purpose, the technical scheme of the utility model is that: a sensing needle device with a back-off mechanism comprises an upper kettle body and a lower kettle body, wherein the upper kettle body is connected with a sensing needle, an installation part for connecting the sensing needle is arranged on the upper kettle body, an installation hole is formed in the installation part, a plurality of layers of fixing structures are longitudinally arranged on the sensing needle along the central axis of the sensing needle, and the fixing structures are a plurality of back-off claws arranged on the sensing needle; the sensing needle is pressed into the mounting hole, the sensing needle and the lower end of the mounting hole are in interference fit, meanwhile, the reversing claw on the sensing needle is embedded into the upper end of the mounting hole, the sensing needle is sleeved with the sealing ring and the sealing spring, the sealing ring and the sealing spring are located in the mounting hole, the upper end of the sealing spring is abutted against the reversing claw, the lower end of the sealing spring is abutted against the sealing ring, and the elastic force of the sealing spring acts on the sealing ring and keeps the sensing needle and the mounting hole in sealing connection.
In the sensing needle device with the reversing mechanism, the mounting hole comprises a fixing part and a sealing part, an annular step is formed at the connecting and connecting position of the fixing part and the sealing part, the reversing claw is embedded into the fixing part, the sealing ring and the sealing spring are mounted in the fixing part, and the sealing ring is abutted against the annular step.
In the sensing pin device with the reversing mechanism, the fixing structure is composed of two reversing claws, and the two reversing claws are symmetrically arranged on the sensing pin, but the extending directions of the free ends of the two reversing claws are opposite.
In the sensing needle device with the reversing mechanism, an included angle alpha between the free end of the reversing claw and the sensing needle in the extending direction is smaller than 45 degrees.
In the sensing needle device with the reversing mechanism, the sealing part is provided with an auxiliary sealing taper groove communicated with the annular step, and the sealing ring is provided with an auxiliary sealing frustum which can be correspondingly sealed and positioned in the auxiliary sealing taper groove.
Adopt above technical scheme, the utility model discloses following beneficial effect has:
the utility model discloses a fixed knot construct when the installation of sensing needle, can imbed into to the mounting hole, cooperate sensing needle and mounting hole lower part interference fit's connected mode simultaneously to make the connection of sensing needle more firm, effectively avoid appearing not hard up and lead to the condition of leaking.
In the utility model, after the sensing needle is installed, the elastic force of the installed and compressed spring acts on the sealing ring, so that the sealing ring is sealed and extruded between the sensing needle and the installation hole, and then the interference fit connection mode of the sensing needle and the lower part of the installation hole is matched; thereby forming a reliable double-layer sealing mode and effectively ensuring the sealing property of the connection between the sensing needle and the upper kettle body.
Drawings
FIG. 1 is a sectional view of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a perspective view of a sensing pin according to the present invention;
FIG. 4 is a plan view of the sensing pin of the present invention
Fig. 5 is an enlarged view of a portion B of fig. 2.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 5, the utility model provides a sensing needle device with a back-off mechanism, which comprises an upper pot body 1 and a lower pot body 2, wherein the upper pot body 1 is connected with a sensing needle 3, an installation part 4 for connecting the sensing needle 3 is arranged on the upper pot body 1, an installation hole 5 is arranged in the installation part 4, a plurality of layers of fixing structures 15 are longitudinally arranged on the sensing needle 3 along the central axis thereof, and the fixing structures 15 are a plurality of back-off claws 6 arranged on the sensing needle 3; the sensing needle 3 is pressed into the mounting hole 5, the sensing needle 3 and the lower end of the mounting hole 5 are in interference fit, meanwhile, the reversing claw 6 on the sensing needle 3 is embedded into the upper end of the mounting hole 5, the sensing needle 3 is sleeved with the sealing ring 7 and the sealing spring 8, the sealing ring 7 and the sealing spring 8 are located in the mounting hole 5, the upper end of the sealing spring 8 is abutted against the reversing claw 6, the lower end of the sealing spring is abutted against the sealing ring 7, and the elastic force of the sealing spring 8 acts on the sealing ring 7 to enable the sensing needle 3 and the mounting hole 5 to be in sealing connection.
When the sensing kettle is installed, the sealing spring 8 and the sealing ring 7 are firstly sleeved on the sensing needle 3, then the sensing needle 3 is pressed into the installation hole 5, the inverted claw 6 in the fixing structure 15 is embedded into the upper end of the installation hole 5, and meanwhile, the sensing needle 3 and the lower end of the installation hole 5 are in an interference fit connection mode, so that the sensing needle 3 is firmly connected with the upper kettle body 1; after the sensing needle 3 is connected, the sealing spring 8 is compressed, and the elastic force of the sealing spring 8 acts on the sealing ring 7, so that the sealing ring 7 is extruded between the connection of the sensing needle 3 and the mounting hole 5 in a sealing manner, and the sealing performance of the mounting connection of the sensing needle 3 is ensured.
Further, the mounting hole 5 comprises a fixing part 5-1 and a sealing part 5-2, an annular step 9 is formed at the connecting joint of the fixing part 5-1 and the sealing part 5-2, the reversing claw 6 is embedded in the fixing part 5-1, the sealing ring 7 and the sealing spring 8 are mounted in the fixing part 5-1, and the sealing ring 7 abuts against the annular step 9; the elasticity of the sealing spring 8 acting on the sealing ring 7 improves the sealing performance of the connection at the annular step 9.
Preferably, the fixing structure 15 is composed of two back-off claws 6, the two back-off claws 6 are symmetrically arranged on the sensing pin 3, but the directions of the free ends of the two back-off claws 6 extending out are opposite; the position design of the back-off claw 6 ensures that the embedding stress between the sensing needle and the mounting hole 5 is uniform and stable.
Further, an included angle a between the extending direction of the free end of the reversing claw 6 and the sensing needle 3 is smaller than 45 degrees; the angle of the back-off claw 6 ensures that the back-off claw is firmly embedded into the mounting hole 5, and is also beneficial to press-fitting and embedding.
Furthermore, the sealing part 5-2 is provided with an auxiliary sealing taper groove 10 communicated with the annular step 9, and the sealing ring 7 is provided with an auxiliary sealing frustum 11 which can be correspondingly sealed in the auxiliary sealing taper groove 10; the auxiliary sealing cone 11 further improves the connection sealing between the sensing needle 3 and the sealing part 5-2.
The sensing needle device with the reversing mechanism provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples herein, and the description of the above embodiments is only used to help understand the technical solution disclosed by the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (5)
1. A sensing needle device with a back-off mechanism comprises an upper kettle body and a lower kettle body, wherein the upper kettle body is connected with a sensing needle; the method is characterized in that: the upper kettle body is provided with an installation part for connecting the sensing needle, the installation part is provided with an installation hole, the sensing needle is longitudinally provided with a plurality of layers of fixing structures along the central axis thereof, and the fixing structures are a plurality of back-off claws arranged on the sensing needle; the sensing needle is pressed into the mounting hole, the sensing needle and the lower end of the mounting hole are in interference fit, meanwhile, the reversing claw on the sensing needle is embedded into the upper end of the mounting hole, the sensing needle is sleeved with the sealing ring and the sealing spring, the sealing ring and the sealing spring are located in the mounting hole, the upper end of the sealing spring is abutted against the reversing claw, the lower end of the sealing spring is abutted against the sealing ring, and the elastic force of the sealing spring acts on the sealing ring and keeps the sensing needle and the mounting hole in sealing connection.
2. The sensing pin device with the reversing mechanism according to claim 1, wherein: the mounting hole comprises a fixing portion and a sealing portion, an annular step is formed at the connection joint of the fixing portion and the sealing portion, the inverted buckle claw is embedded into the fixing portion, the sealing ring and the sealing spring are mounted in the fixing portion, and the sealing ring is abutted to the annular step.
3. The sensing pin device with the reversing mechanism according to claim 1, wherein: the fixing structure is composed of two reverse-buckling claws, the two reverse-buckling claws are symmetrically arranged on the sensing needle, but the extending directions of the free ends of the two reverse-buckling claws are opposite.
4. The sensing pin device with the reversing mechanism according to claim 3, wherein: and an included angle alpha between the extending direction of the free end of the reversing claw and the sensing needle is less than 45 degrees.
5. The sensing pin device with the reversing mechanism according to claim 2, wherein: the sealing portion is provided with an auxiliary sealing taper groove communicated with the annular step, and the sealing ring is provided with an auxiliary sealing frustum which can be correspondingly sealed and positioned in the auxiliary sealing taper groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121429515.5U CN214887350U (en) | 2021-06-26 | 2021-06-26 | Sensing needle device with back-off mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121429515.5U CN214887350U (en) | 2021-06-26 | 2021-06-26 | Sensing needle device with back-off mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214887350U true CN214887350U (en) | 2021-11-26 |
Family
ID=78930649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121429515.5U Active CN214887350U (en) | 2021-06-26 | 2021-06-26 | Sensing needle device with back-off mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214887350U (en) |
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2021
- 2021-06-26 CN CN202121429515.5U patent/CN214887350U/en active Active
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