Air suspension pressure sensor
By using the limiting and fixed structure of the limiting groove and cover in the air suspension pressure sensor, the problem of degradation of measurement accuracy caused by the pressure-sensitive element deviation is solved, and higher pressure resistance and accuracy are achieved.
Patent Information
- Application Number
- CN202422079105.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The pressure-sensitive element in the air suspension pressure sensor may be offset after multiple pressures, resulting in the measurement accuracy being affected.
An air suspension pressure sensor is designed. By setting a limit groove and a cover body in the sensor housing, the shape of the limit groove is adapted to the pressure induction piece, and the cover body is fixed by a hook and a bayonet to limit the displacement of the pressure induction piece.
It effectively prevents the offset of the pressure sensing sheet in the sensor, improves the measurement accuracy, and improves the pressure resistance of the sensor through a firm cover fixing structure.
Smart Images
Figure CN222951893U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure sensors, in particular to an air suspension pressure sensor. Background Art
[0002] The air suspension pressure sensor is an important part of the air suspension system. It can measure the air pressure of the air supply unit in the air suspension system and transmit the measured pressure information to the control module to provide decision-making for the system. The pressure-sensitive element in the air suspension pressure sensor may shift after being pressurized multiple times, resulting in a loss of measurement accuracy. Summary of the invention
[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides an air suspension pressure sensor, which aims to prevent the pressure-sensitive element from being easily offset.
[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides an air suspension pressure sensor, including a sensor housing and a pressure sensing piece, wherein the sensor housing has an assembly cavity; a limiting groove is provided at the bottom of the assembly cavity, the shape of the limiting groove is adapted to the shape of the pressure sensing piece, and the pressure sensing piece is limitedly installed in the limiting groove; a gas detection channel is connected to the bottom of the limiting groove, and the bottom surface of the pressure sensing piece is opposite to the orifice of the gas detection channel; a cover is provided at the top of the assembly cavity, a cover body is fixed at the cover, and the top surface of the pressure sensing piece is limitedly pressed against the cover body.
[0005] Furthermore, a plurality of hooks are arranged on the peripheral side of the cover body, and a plurality of slots are arranged on the peripheral side of the cover opening, and the hooks are correspondingly buckled into the slots, so that the cover body can be fixed at the cover opening.
[0006] Furthermore, a first sealing ring is provided between the cover body and the bottom of the assembly cavity, the first sealing ring is in an elastically compressed state, and the hook is pressed against the inside of the bayonet under the elastic action of the first sealing ring.
[0007] Furthermore, the cover is rectangular, two bayonet openings are arranged side by side on the long side of the cover, and one bayonet opening is arranged in the center on the short side of the cover.
[0008] Furthermore, a second sealing ring is provided at the opening of the gas detection channel, and the second sealing ring is compressed and clamped between the pressure sensing sheet and the bottom of the limiting groove.
[0009] Furthermore, the pressure sensing sheet is connected to a circuit board, the circuit board is connected to plug pins, and the plug pins extend out of the sensor housing.
[0010] Beneficial effects: The air suspension pressure sensor of the utility model has the following beneficial effects:
[0011] 1) The pressure sensing piece is limited by the limiting groove and the cover body, so that the pressure sensing piece is not easily offset inside the sensor housing;
[0012] 2) The cover body is buckled into the cover opening through a hook, so that the cover body can be firmly fixed at the cover opening, and the cover body is not easily damaged after being compressed, thereby improving the pressure resistance of the air suspension pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Attached Figure 1 It is a schematic diagram of the external structure of the air suspension pressure sensor;
[0014] Attached Figure 2 is a schematic diagram of the structure of the cover;
[0015] Attached Figure 3 is a schematic diagram of the pressure sensing piece in the sensor housing;
[0016] Attached Figure 4 It is a structural schematic diagram of the limit groove and the gas detection channel; DETAILED DESCRIPTION
[0017] The utility model is further described below in conjunction with the accompanying drawings.
[0018] As attached Figures 1 to 4 The air suspension pressure sensor comprises a sensor housing 1 and a pressure sensing piece 3, specifically, the pressure sensing piece 3 is a MEMS pressure module. An assembly cavity is arranged inside the sensor housing 1, and a limiting groove 4 is arranged at the bottom of the assembly cavity. The shape of the limiting groove 4 is adapted to the shape of the pressure sensing piece 3, and the pressure sensing piece 3 is limitedly installed in the limiting groove 4, and the displacement of the pressure sensing piece 3 in the horizontal direction can be limited by the limiting groove 4. The bottom of the limiting groove 4 is connected with a gas detection channel 5, and the bottom surface of the pressure sensing piece 3 is a sensing surface. The bottom surface of the pressure sensing piece 3 is opposite to the orifice of the gas detection channel 5. The air comes to the pressure sensing piece 3 through the gas detection channel 5, and applies pressure to the pressure sensing piece 3, so that the pressure sensing piece 3 can measure the air pressure. There is a cover at the top of the assembly cavity, and a cover body 6 is fixed at the cover. The top surface of the pressure sensing piece 3 is limited against the cover body 6, and the cover body 6 can limit the displacement of the pressure sensing piece 3 in the vertical direction. With the cooperation of the limiting groove 4 and the cover body 6 , the pressure sensing sheet 3 is limited, so the pressure sensing sheet 3 is not easily offset in the air suspension pressure sensor, thereby preventing the measurement accuracy of the pressure sensor from being affected by the offset.
[0019] The cover body 6 is provided with a plurality of hooks 7 on the periphery, and the cover opening is provided with a plurality of bayonet holes 8 on the periphery. The hooks 7 are correspondingly buckled into the bayonet holes 8 so that the cover body 6 can be fixed at the cover opening. Through the cooperation of the hooks 7 and the bayonet holes 8, the cover body 6 can be securely fixed at the cover opening.
[0020] As attached Figure 1 and 2 In the embodiment shown, the sensor body is square, and accordingly, the cover is rectangular, and the cover body 6 is also rectangular. Six bayonet holes 8 are provided on the cover, of which two bayonet holes 8 are arranged side by side on the long side of the cover, and one bayonet hole 8 is arranged in the middle on the short side of the cover. Correspondingly, six hooks 7 are provided on the cover body 6, of which two hooks 7 are arranged side by side on the long side of the cover, and one hook 7 is arranged in the middle on the short side of the cover. The six hooks 7 cooperate with the six bayonet holes 8, so that the cover body 6 can be stably fixed at the cover of the sensor housing 1, and the six hooks 7 are evenly stressed, have good pressure resistance, and are not easy to break due to pressure.
[0021] A first sealing ring 9 is provided between the cover body 6 and the bottom of the assembly cavity. Figure 2 As shown in , the first sealing ring 9 is opposite to the bottom edge of the cover body 6, so as to seal the assembly cavity. Moreover, the first sealing ring 9 is in an elastic compression state, and the hook 7 is pressed against the inside of the bayonet 8 under the elastic action of the first sealing ring 9.
[0022] A second sealing ring 10 is provided at the opening of the gas detection channel 5, and the second sealing ring 10 is compressed and clamped between the pressure sensing plate 3 and the bottom of the limiting groove 4. The second sealing ring 10 seals the pressure sensing plate 3 and the limiting groove 4 to prevent gas from escaping from between the pressure sensing plate 3 and the limiting groove 4.
[0023] The pressure sensing sheet 3 is connected to a circuit board 11 , and the circuit board 11 is connected to a plug pin 2 . The plug pin 2 extends out of the sensor housing 1 . The pressure sensing sheet 3 can output the measured gas pressure information through the plug pin 2 .
[0024] The utility model limits the pressure sensing sheet 3 by the cooperation between the cover body 6 and the limiting groove 4 to prevent the pressure sensing sheet 3 from deflecting in the sensor housing 1; the cover body 6 is fixed on the sensor housing 1 by the cooperation between the hook 7 and the groove, which is easy to install, and the layout of the hook 7 is reasonable, so that the hook 7 is not easy to break and has good pressure resistance.
[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. An air suspension pressure sensor, characterized in that: The invention comprises a sensor housing (1) and a pressure sensing sheet (3), wherein the sensor housing (1) has an assembly cavity; a limiting groove (4) is provided at the bottom of the assembly cavity, the shape of the limiting groove (4) is adapted to the shape of the pressure sensing sheet (3), and the pressure sensing sheet (3) is limitedly installed in the limiting groove (4); the bottom of the limiting groove (4) is connected to a gas detection hole (5), and the bottom surface of the pressure sensing sheet (3) is opposite to the hole of the gas detection hole (5); a cover is provided at the top of the assembly cavity, a cover body (6) is fixed at the cover, and the top surface of the pressure sensing sheet (3) is limitedly pressed against the cover body (6).
2. The air suspension pressure sensor according to claim 1, characterized in that: The cover body (6) is provided with a plurality of hooks (7) on the periphery, and the cover opening is provided with a plurality of slots (8) on the periphery. The hooks (7) are correspondingly buckled into the slots (8) so that the cover body (6) can be fixed at the cover opening.
3. An air suspension pressure sensor according to claim 2, characterized in that: A first sealing ring (9) is provided between the cover body (6) and the bottom of the assembly cavity. The first sealing ring (9) is in an elastically compressed state. The hook (7) is pressed against the inside of the bayonet (8) under the elastic action of the first sealing ring (9).
4. The air suspension pressure sensor according to claim 2, characterized in that: The cover is rectangular, two bayonet openings (8) are arranged side by side on the long side of the cover, and one bayonet opening (8) is arranged in the center on the short side of the cover.
5. The air suspension pressure sensor according to claim 1, characterized in that: A second sealing ring (10) is provided at the opening of the gas detection channel (5), and the second sealing ring (10) is clamped in a compressed state between the pressure sensing sheet (3) and the bottom of the limiting groove (4).
6. An air suspension pressure sensor according to any one of claims 1 to 5, characterized in that: The pressure sensing sheet (3) is connected to a circuit board (11), the circuit board (11) is connected to a plug pin (2), and the plug pin (2) extends out of the sensor housing (1).