Shell for ceramic sensor

Abstract

The utility model discloses a shell for a ceramic sensor, which belongs to the technical field of ceramic sensors and comprises a closed base, an anti-loose locking structure, a sealing rubber ring group and a self-sealing pressure relief mechanism, a protective shell is in threaded connection with the closed base, a sensor body is packaged in the closed base, the anti-loose locking structure is arranged on the protective shell, and the sealing rubber ring group is arranged in the closed base. And the motor is arranged in the closed base. According to the technical scheme, the sealing rubber ring set is used for sealing a contact gap between the sealing base and the protective shell, the sealing performance of the connecting position can be guaranteed and water can be prevented from entering the shell in a threaded connection mode, the anti-loosening locking structure can be inserted into the sealing base to generate a clamping effect, and rotation loosening of the protective shell is limited; and the self-sealing pressure relief mechanism is used for balancing the air pressure, so that the situation that the precision of the sensor is affected due to the fact that the internal air pressure is too large after packaging is completed is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ceramic sensor technology field, specifically a kind of shell for ceramic sensor. BACKGROUND

[0002] The ceramic sensor is the sensor of ceramic material selection, and the shell thereof is also inclined to ceramic material. Because the ceramic shell has many excellent characteristics, it is widely used in various sensors, especially those sensors that need to withstand harsh environment or high temperature and high pressure environment. For example, ceramic pressure sensors are widely used in the fields of automotive engineering, aerospace, petrochemical industry, medical devices and power systems.

[0003] The utility model with publication number CN221506006U relates to a shell for ceramic sensor. The shell for ceramic sensor can effectively unload the impact force acting on the shell to reduce the impact force received by the sensor. Meanwhile, with the cooperation of the protective sleeve in the shell, the impact force transmitted to the sensor can be further reduced to reduce the probability of damage to the sensor after receiving external impact force.

[0004] However, the above structure cannot provide strong sealing performance when packaging sensor elements. When the sensor works in a liquid environment or works in a humid environment for a long time, part of the water will inevitably contact the internal circuit elements through the shell, which will cause damage to the sensor or affect the accuracy of the sensor monitoring data. Therefore, the present application provides a shell for ceramic sensor. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problem to provide a kind of shell for ceramic sensor, and the ceramic sensor shell is packaged to sensor body by closed base and protective shell, because closed base and protective shell are connected by screw thread and the sealing rubber ring group with large sealing area is arranged at the connecting portion, so the sealing performance of the connecting portion can be ensured, and the moisture can be prevented from entering the inside of the shell, and the anti-loosening locking structure is arranged to clamp the closed base and the protective shell together, to prevent the protective shell from rotating and causing the connection to loosen and affect the sealing performance. In addition, the self-sealing pressure relief mechanism is arranged on the closed base, which can discharge the internal air during packaging, to avoid the internal air pressure being too high after packaging and affecting the accuracy of the sensor. The self-sealing effect can prevent external liquid or gas from entering the shell, and the technical problems in the prior art are solved.

[0006] The technical solution adopted by the embodiment of the present application to solve the technical problem is as follows:

[0007] The application discloses a ceramic sensor shell, which comprises a closed base, a protective shell threadedly connected to the closed base, a sensor body encapsulated in the protective shell, an anti-loosening locking structure arranged on the protective shell and capable of being inserted into the closed base to produce a clamping effect and limit the loosening of the protective shell, a sealing rubber ring group arranged in the closed base and capable of sealing the contact gap between the closed base and the protective shell, and a self-sealing pressure relief mechanism arranged in the closed base and capable of balancing the air pressure to avoid affecting the sensor accuracy due to the excessive air pressure in the shell after encapsulation.

[0008] In a possible implementation, the anti-loosening locking structure comprises a locking clamping groove arranged on the closed base, and the protective shell is fixedly provided with a plurality of anti-disengagement guide buckles, wherein a sliding insertion piece is slidingly arranged, friction rubber sheets are attached to the two sides of the bottom end of the sliding insertion piece, the friction rubber sheets are attached to the groove wall of the locking clamping groove when the sliding insertion piece is slidingly inserted into the locking clamping groove, and the sliding insertion piece is clamped when the closed base is tightly threadedly connected with the protective shell, so that the rotation of the protective shell is clamped, and the connection is prevented from loosening. The friction rubber sheets can effectively prevent the sliding insertion piece from disengaging from the locking clamping groove.

[0009] In a possible implementation, a limiting block is fixedly arranged on the sliding insertion piece, the limiting block can prevent the sliding insertion piece from disengaging from the anti-disengagement guide buckle during the sliding process, and a pushing piece is fixedly arranged at the top end of the sliding insertion piece, so that the user can push the sliding insertion piece to move. When the limiting block is attached to the anti-disengagement guide buckle, the bottom end of the sliding insertion piece slides out of the locking clamping groove. In addition, a matching guide groove is arranged on the protective shell, and the sliding insertion piece is slidingly arranged in the matching guide groove. This structure can make the sliding of the sliding insertion piece more stable and prevent deviation.

[0010] In a possible implementation, the closed base comprises a bottom plate, an outer closed cylinder and an outer thread connection shaft are fixedly arranged on the upper end surface of the bottom plate, and an inner thread joint is fixedly connected to the bottom end of the protective shell and threadedly connected with the outer thread connection shaft. This structure can realize the thread sealing connection between the closed base and the protective shell.

[0011] In a possible implementation, the sealing rubber ring group comprises a lower sealing ring and a side sealing ring. The lower sealing ring is arranged in the groove formed by the outer closed cylinder and the outer thread connection shaft, and the side sealing ring is arranged in the gap between the inner thread joint and the outer closed cylinder. This structure can completely block the gap between the closed base and the protective shell through the cooperation of the lower sealing ring and the side sealing ring, thereby improving the sealing effect of the connection.

[0012] In a possible implementation, the lower sealing ring comprises a hollow rubber ring, and a plurality of elastic supporting pieces are arranged inside the hollow rubber ring, which can ensure that the hollow rubber ring can be deformed to a large extent to improve the sealing effect, and meanwhile has a strong deformation recovery capability, and a plurality of water-blocking ribs are fixedly arranged on the upper end surface of the hollow rubber ring, which can form a plurality of water-blocking rings to improve the sealing effect.

[0013] In a possible implementation, the self-sealing pressure relief mechanism comprises a pressure relief hole formed in the closed base, an outwardly expanded exhaust groove is formed at the bottom of the pressure relief hole, a sealing ring is fixedly arranged in the middle of the pressure relief hole, a guide shaft is slidingly arranged, a plurality of air vent groove holes are formed in the sealing ring and communicate with the ring hole, and a sliding sealing piece is fixedly connected to the bottom end of the guide shaft.

[0014] In a possible implementation, a disc is fixedly connected to the top end of the guide shaft, a reset spring is sleeved outside the guide shaft, and the two ends of the reset spring abut against the disc and the sealing ring respectively, when the internal air pressure decreases, the reset spring pushes the guide shaft to slide back to reset, so that the sliding sealing piece moves inward and abuts against the sealing ring, thereby playing a sealing role, and preventing external moisture or gas from entering the shell to interfere with the internal electrical elements.

[0015] In summary, the utility model has the following beneficial technical effects:

[0016] The ceramic sensor shell is packaged with the sensor body through the closed base and the protective shell, the closed base and the protective shell are threadedly connected, the connection part is provided with the sealing rubber ring group with a large sealing area, the sealing performance of the connection part can be ensured, moisture is prevented from entering the shell, the anti-loosening locking structure is arranged to clamp the closed base and the protective shell together, and the rotation of the protective shell is prevented from causing loosening of the connection and affecting the sealing performance.

[0017] In addition, the closed base is provided with the self-sealing pressure relief mechanism, which can exhaust the internal air during packaging, prevent the internal air pressure from being too high after packaging to affect the sensor accuracy, and has a self-sealing effect to prevent external liquid or gas from entering the shell. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute a limitation on the utility model. In the drawings:

[0019] Figure 1 It is a whole structure schematic view of the utility model.

[0020] Figure 2 The utility model discloses a structure constitutes the schematic diagram of the utility model;

[0021] Figure 3 The utility model discloses the locking structure schematic diagram of preventing loosening of the utility model;

[0022] Figure 4 The utility model discloses the internal structure schematic diagram of the utility model;

[0023] Figure 5 The utility model discloses the lower sealing ring structure schematic diagram of the utility model.

[0024] In the drawing: 1, closed base; 11, bottom plate; 12, outer closed cylinder; 13, outer thread connection axle; 2, protective shell; 21, matched guide groove; 22, inner thread joint; 3, sensor body; 4, locking structure of preventing loosening; 41, locking slot; 42, anti-separation guide buckle; 43, sliding insertion piece; 44, friction rubber sheet; 45, limiting block; 46, push piece; 5, sealing rubber ring group; 51, lower sealing ring; 511, hollow rubber ring; 512, elastic supporting piece; 513, water-blocking rib; 52, side sealing ring; 6, self-sealing pressure relief mechanism; 61, pressure relief hole; 62, exhaust groove; 63, closed ring; 631, air passage hole; 64, guide shaft; 641, sliding plugging piece; 65, reset spring. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiment of the application is to solve the problems in the background art, and the general idea is as follows:

[0026] As shown in Figure 1 - Figure 2 The utility model discloses a shell for ceramic sensor, including closed base 1, is connected with the protective shell 2 of thread on it, wherein encapsulation has sensor body 3, locking structure 4 of preventing loosening, is set up on the protective shell 2, can insert closed base 1 and produce the joint action of clamping, limit protective shell 2 and turn loose, prevent the turn of protective shell 2 and cause the connection loose and influence sealing performance, sealing rubber ring group 5, it is set up in closed base 1, to close the contact gap of closed base 1 and protective shell 2, with the way of cooperation thread connection, can keep the sealing performance of connection, prevent moisture from entering the shell inside, self-sealing pressure relief mechanism 6, set up in closed base 1, to balance air pressure, avoid the interior air pressure of encapsulation and be too big and influence sensor accuracy.

[0027] As shown in Figure 3As shown, the anti-loosening locking structure 4 comprises a locking clamping groove 41 formed on the closed base 1, and the protective shell 2 is fixedly provided with a plurality of anti-disengagement guide buckles 42, wherein the sliding insert piece 43 is slidingly arranged, and the bottom end of the sliding insert piece 43 is attached with a friction rubber sheet 44 on both sides, and when the sliding insert piece 43 is slidingly inserted into the locking clamping groove 41, the friction rubber sheet 44 is attached with the groove wall of the locking clamping groove 41, and when the closed base 1 is tightly connected with the protective shell 2 through screw threads, the sliding insert piece 43 is inserted into the locking clamping groove 41, and at this time, the rotation of the protective shell 2 is locked by the sliding insert piece 43, so that the effect of avoiding loosening connection can be achieved, and the friction rubber sheet 44 can produce significant friction with the locking clamping groove 41, so as to effectively prevent the sliding insert piece 43 from disengaging from the locking clamping groove 41.

[0028] In addition, the sliding insert piece 43 is fixedly provided with a limiting block 45, which can prevent the sliding insert piece 43 from disengaging from the anti-disengagement guide buckle 42 during the sliding process, and the top end of the sliding insert piece 43 is fixedly provided with a push piece 46, which can facilitate the user to move the sliding insert piece 43, and when the limiting block 45 is attached with the anti-disengagement guide buckle 42, the bottom end of the sliding insert piece 43 slides away from the locking clamping groove 41, and in addition, the protective shell 2 is provided with a matching guide groove 21, and the sliding insert piece 43 is slidingly arranged in the matching guide groove 21, and this structure can make the sliding of the sliding insert piece 43 more stable and not deviate.

[0029] As shown in the figure, Figure 4 The closed base 1 comprises a bottom plate 11, and an outer closed cylinder 12 and an outer threaded connecting shaft 13 are fixedly arranged on the upper end face of the bottom plate 11, and the bottom end of the protective shell 2 is fixedly connected with an inner threaded joint 22, which is threadedly connected with the outer threaded connecting shaft 13, and the above structure can realize the threaded sealing connection between the closed base 1 and the protective shell 2.

[0030] As shown in the figure, Figure 4 The sealing rubber ring set 5 comprises a lower sealing ring 51 and a side sealing ring 52, wherein the lower sealing ring 51 is arranged in the groove formed by the outer closed cylinder 12 and the outer threaded connecting shaft 13, and the side sealing ring 52 is arranged in the gap between the inner threaded joint 22 and the outer closed cylinder 12, and the above structure can completely block the gap between the closed base 1 and the protective shell 2 through the combined action of the lower sealing ring 51 and the side sealing ring 52, thereby improving the sealing effect of the connection.

[0031] As shown in the figure, Figure 5 The lower sealing ring 51 comprises a hollow rubber ring 511, and a plurality of elastic supporting pieces 512 are arranged inside the hollow rubber ring 511, and this structure can ensure that the hollow rubber ring 511 can be deformed to a large extent to improve the sealing effect, while having strong deformation recovery ability, and a plurality of water-blocking convex ribs 513 are fixedly arranged on the upper end face of the hollow rubber ring 511, and this structure can form a plurality of water-blocking rings to improve the sealing effect.

[0032] As Figure 4 The self-sealing pressure relief mechanism 6 includes a pressure relief hole 61 opened on the closed base 1, the bottom of which is provided with an outwardly expanded exhaust groove 62, and a sealing ring 63 is fixedly arranged in the middle of the pressure relief hole 61, wherein a guide shaft 64 is slidingly arranged, and a plurality of air vent groove holes 631 are opened in the sealing ring 63 and communicated with the ring holes, and the bottom end of the guide shaft 64 is fixedly connected with a sliding sealing piece 641, when the internal pressure is larger, the air pressure will push the sliding sealing piece 641 to move outward, so that the internal space is communicated with the exhaust groove 62, thereby playing a pressure relief role, and the guide shaft 64 can ensure that the sliding sealing piece 641 does not deviate during sliding.

[0033] In addition, the top end of the guide shaft 64 is fixedly connected with a circular plate, and the guide shaft 64 is sleeved with a reset spring 65, and the two ends of the reset spring 65 abut against the circular plate and the sealing ring 63 respectively, when the internal pressure is reduced, the reset spring 65 will push the guide shaft 64 to slide back to reset, so that the sliding sealing piece 641 moves inward and abuts against the sealing ring 63, thereby playing a sealing role, avoiding that external moisture or gas enters the inside of the shell through the pressure relief hole 61, and interfering with the internal electrical elements.

[0034] The use principle and use process of the utility model are as follows:

[0035] The ceramic sensor shell is packaged with the sensor body 3 through the closed base 1 and the protective shell 2, because the closed base 1 and the protective shell 2 are threadedly connected and the connecting part is provided with a sealing rubber ring group 5 with a large sealing area, so that the sealing performance of the connecting part can be ensured, preventing moisture from entering the inside of the shell, and the anti-loosening locking structure 4 can be arranged to clamp the closed base 1 and the protective shell 2 together, preventing the protective shell 2 from rotating to cause loosening of the connection and affecting the sealing performance, and the specific performance is that when the closed base 1 and the protective shell 2 are tightly threadedly connected, the sliding insert piece 43 is inserted into the locking slot 41, at this time the rotation of the protective shell 2 is locked by the sliding insert piece 43, so that the effect of preventing loosening of the connection can be achieved, and the friction rubber sheet 44 can produce significant friction with the locking slot 41, effectively preventing the sliding insert piece 43 from being separated from the locking slot 41.

[0036] In addition, the sealing base 1 is provided with a self-sealing pressure relief mechanism 6, which can discharge internal air during packaging, avoid affecting the sensor accuracy due to the internal air pressure being too large after packaging is completed, and has a self-sealing effect, which can prevent external liquid or gas from entering the shell; Specifically, when the internal air pressure is large, the air pressure will push the sliding sealing plate 641 to move outward, so that the internal space is communicated with the exhaust groove 62, thereby playing a role of pressure relief, and the guide shaft 64 can ensure that the sliding sealing plate 641 does not deviate during sliding; When the internal air pressure is reduced, the reset spring 65 will push the guide shaft 64 to slide back to reset, so that the sliding sealing plate 641 moves inward and is attached to the sealing ring 63, thereby playing a sealing role, avoiding external moisture or gas entering the shell, and interfering with the internal electrical elements.

[0037] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly illustrating the utility model, and are not limited to the implementation. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the implementation. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A housing for a ceramic sensor, characterized by The utility model provides a kind of sensor protection device, including: Closed base (1), threaded connection is carried out on the protective shell (2) on it, wherein sensor body (3) is enclosed; Anti-loose locking structure (4) is arranged on protective shell (2), can be inserted into closed base (1) to produce clamping effect, limit protective shell (2) to turn loose; Sealing rubber ring group (5) is arranged in closed base (1), to close the contact gap of closed base (1) and protective shell (2); Self-sealing pressure relief mechanism (6) is arranged in closed base (1), to balance air pressure.

2. A housing for a ceramic sensor according to claim 1, characterized in that: The anti-loose locking structure (4) includes locking clamping groove (41) opened in closed base (1), the protective shell (2) is fixedly provided with a plurality of anti-disengagement guide buckles (42), wherein slidingly provided with sliding insert piece (43), sliding insert piece (43) bottom side is attached with friction rubber sheet (44), when sliding insert piece (43) is inserted into locking clamping groove (41), friction rubber sheet (44) is attached with the groove wall of locking clamping groove (41).

3. A housing for a ceramic sensor according to claim 2, characterized in that: The sliding insert piece (43) is fixedly provided with a limit block (45), and the top of the sliding insert piece (43) is fixedly provided with a tab (46), wherein when the limit block (45) is attached with the anti-disengagement guide buckle (42), the bottom of the sliding insert piece (43) slides away from the locking clamping groove (41), in addition, the protective shell (2) is provided with a matching guide groove (21), and the sliding insert piece (43) is slidingly arranged in the matching guide groove (21).

4. A housing for a ceramic sensor according to claim 1, characterized in that: The closed base (1) includes a bottom plate (11), an outer sealing cylinder (12) and an outer threaded connection shaft (13) are fixedly arranged on the upper end surface of the bottom plate (11), the bottom end of the protective shell (2) is fixedly connected with an inner threaded joint (22), and the inner threaded joint (22) is threadedly connected with the outer threaded connection shaft (13).

5. A housing for a ceramic sensor according to claim 4, characterized in that: The sealing rubber ring group (5) includes a lower sealing ring (51) and a side sealing ring (52), wherein the lower sealing ring (51) is arranged in a groove formed by the outer sealing cylinder (12) and the outer threaded connection shaft (13), and the side sealing ring (52) is arranged in a gap between the inner threaded joint (22) and the outer sealing cylinder (12).

6. A housing for a ceramic sensor according to claim 5, characterized in that: The lower sealing ring (51) includes a hollow rubber ring (511), a plurality of elastic supporting pieces (512) are arranged in the hollow rubber ring (511), and a plurality of water-blocking convex ribs (513) are fixedly arranged on the upper end surface of the hollow rubber ring (511).

7. A housing for a ceramic sensor according to claim 1, characterized in that: The self-sealing pressure relief mechanism (6) includes a pressure relief hole (61) opened in the closed base (1), an outwardly expanded exhaust groove (62) is opened at the bottom of the pressure relief hole (61), a sealing ring (63) is fixedly arranged in the middle of the pressure relief hole (61), a guide shaft (64) is slidingly arranged in the sealing ring (63), a plurality of air passage grooves (631) are opened in the sealing ring (63) and communicated with the ring hole of the sealing ring (63), and a sliding sealing piece (641) is fixedly connected to the bottom end of the guide shaft (64).

8. A housing for a ceramic sensor according to claim 7, characterized in that: The top of the guide shaft (64) is fixedly connected with a circular plate, a reset spring (65) is sleeved on the guide shaft (64), and the two ends of the reset spring (65) abut against the circular plate and the sealing ring (63) respectively.

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