A vibration isolation connection device for an intake air pressure sensor

Abstract

The utility model discloses a kind of anti-vibration connecting devices for air intake pressure sensor, belong to sensor anti-vibration field.The utility model includes primary damping device, primary damping device includes fixed base, and fixed base bottom is equipped with rubber pad;Secondary damping device includes connecting block, connecting block four are a group, a group of connecting block is installed on fixed base, another group connecting block is installed on base bottom surface, spring one is set between two connecting blocks, and damping ring is also installed between fixed base and base;Locking device includes tray, and circular recess is provided in tray, and circular recess connects clamping groove, spring two is provided in clamping groove inside, spring two connects limiting block, circular recess cooperates with bolt, and clamping block on bolt cooperates with clamping groove.The utility model passes through additional double anti-vibration device, quick locking device, solves the problem that common air intake pressure sensor anti-vibration connecting device damping effect is not good, affects the stability of connection.

Description

Technical Field

[0001] This utility model relates to the field of sensor vibration protection, specifically a vibration protection connection device for an intake pressure sensor. Background Technology

[0002] As a core component of the engine management system, the accuracy of the intake pressure sensor directly affects the control precision of the air-fuel ratio. To isolate the sensor from interference caused by engine vibration, existing technologies often employ vibration-damping connection devices for installation. Common methods include using the elastic deformation of rubber pads to absorb vibration energy, or using metal brackets with cushioning materials to isolate the sensor from the vibration source.

[0003] However, such devices still have certain limitations in practical applications. For example, a common approach is to rely on a single-material rubber pad for vibration damping, with bolt holes drilled in it, and the sensor is pressed and fixed in place by tightening bolts. While this method is simple in structure, its vibration damping frequency range is limited, making it difficult to effectively cope with the impact of wide-frequency vibrations under the complex operating conditions of an engine. Furthermore, bolted connections are inconvenient to operate in confined spaces and pose a risk of loosening under long-term vibration, potentially affecting the stability and sealing reliability of the connection. Therefore, there is an urgent need for an intake pressure sensor vibration damping connection device that can provide wide-band vibration damping and has the ability to quickly lock and reliably seal, in order to overcome the aforementioned shortcomings. Utility Model Content

[0004] The purpose of this utility model is to provide a vibration-damping connection device for an intake pressure sensor. By adding a double vibration-damping device and a quick-locking device, the problem of poor vibration reduction effect and connection stability of common vibration-damping connection devices for intake pressure sensors is solved.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model is a vibration damping connection device for an intake pressure sensor, including a primary vibration damping device including a fixed base, and a rubber pad installed at the bottom of the fixed base; preferably, the rubber pad is made of fluororubber; the primary vibration damping device also includes bolt holes, and the bolt hole matrix is ​​arranged at the four corners of the fixed base.

[0007] Furthermore, the secondary vibration damping device includes connecting blocks, with four connecting blocks forming a group. One group of connecting blocks is mounted on the fixed base, and the other group of connecting blocks is mounted on the bottom surface of the base. A spring is provided between two connecting blocks; preferably, the spring is a stainless steel helical compression spring. A damping ring is also installed between the fixed base and the base. Preferably, the damping ring is filled with a non-Newtonian fluid material.

[0008] Furthermore, the locking device includes a tray with a circular groove inside, which connects to a slot. A second spring is located inside the slot, and the second spring connects to a limiting block. The circular groove engages with a pin, and a locking block on the pin engages with the slot. Preferably, the locking block has a guide slope. The combination of the second spring and the limiting block is flush with the surface of the tray in the normal state. Preferably, the tray is symmetrically mounted on the base using screws.

[0009] Furthermore, the auxiliary device includes a connecting sleeve mounted on a pin, and a sealing ring is also mounted around the pin on the connecting sleeve. Preferably, the sealing ring is a nitrile rubber O-ring. The connecting sleeve is mated to the pressure sensor. Preferably, the connecting sleeve is matched with the pressure sensor interface.

[0010] This utility model has the following beneficial effects:

[0011] This invention can effectively attenuate the transmission of wide-frequency vibrations in an engine. Its primary vibration damping device absorbs low-frequency vibrations through rubber pads, while the secondary vibration damping device significantly suppresses high-frequency resonance through the synergistic effect of springs and damping rings, providing a more stable working environment for the pressure sensor and thus improving the accuracy and reliability of the measurement data.

[0012] This invention achieves rapid installation and reliable fixation of the sensor through an innovative locking device. The pin and the slot with a spring-loaded limit block cooperate in a simple operation and have a self-locking characteristic, effectively avoiding the loosening that may occur in traditional bolt connections under vibration, while ensuring the airtightness and stability of the connection.

[0013] This invention also utilizes an integrated sealing ring connecting sleeve structure to ensure a tight seal at the sensor interface while enabling quick connection. Its modular design simplifies installation and maintenance, and the overall structure is compact and reliable, significantly improving the product's usability and lifespan.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] Figure 1 A schematic diagram of a vibration-damping connection device for an intake pressure sensor;

[0016] Figure 2 A schematic diagram of the bottom structure of a vibration-damping connection device for an intake pressure sensor;

[0017] Figure 3 An exploded view of a vibration-damping connection device for an intake pressure sensor.

[0018] Figure 4 This is a schematic diagram of the locking device structure of an anti-vibration connection device for an intake pressure sensor.

[0019] In the diagram: 1. Primary vibration damping device; 101. Fixed base; 102. Bolt hole; 103. Rubber pad; 2. Secondary vibration damping device; 201. Connecting block; 202. Spring 1; 203. Damping ring; 204. Base; 3. Locking device; 301. Tray; 302. Circular groove; 303. Slot; 304. Spring 2; 305. Limiting block; 306. Pin; 307. Locking block; 4. Auxiliary device; 401. Connecting sleeve; 402. Sealing ring; 403. Pressure sensor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a vibration damping connection device for an intake pressure sensor, including a primary vibration damping device 1 comprising a fixed base 101. The fixed base 101 serves as the main mounting base and is connected and fixed to the engine with bolts through bolt holes 102 at its four corners. A rubber pad 103 is installed at the bottom of the fixed base 101, forming the first stage of vibration damping, mainly used to isolate low-frequency, large-amplitude vibrations transmitted by the engine. In use, engine vibration is first transmitted through the fixed base 101 and initially attenuated by the rubber pad 103.

[0022] The secondary vibration damping device 2 includes connecting blocks 201, with four connecting blocks 201 arranged in a group. One group of connecting blocks 201 is mounted on the fixed base 101, and the other group is mounted on the bottom surface of the base 204. A spring 202 is installed between two connecting blocks 201, providing elastic support. Together with the connecting blocks 201, the spring 202 forms the elastic system for the second-stage vibration damping. A damping ring 203 is also installed between the fixed base 101 and the base 204. The special material filled inside the damping ring 203 can change its damping characteristics according to the vibration frequency, effectively suppressing high-frequency resonance. The remaining vibration is buffered a second time by the elastic system composed of the connecting blocks 201 and the spring 202, while the damping ring 203 specifically absorbs vibrations of a particular frequency, achieving a dual vibration damping effect.

[0023] The locking device 3 includes a tray 301, in which a circular groove 302 is provided. The circular groove 302 is connected to a slot 303. A second spring 304 is provided inside the slot 303. The second spring 304 is connected to a limiting block 305. The second spring 304 always provides an outward force to the limiting block 305. The circular groove 302 is engaged with a pin 306. The locking block 307 on the pin 306 is engaged with the slot 303. During installation, the pin 306 is inserted along the circular groove 302. When the locking block 307 on it contacts the limiting block 305, it overcomes the elastic force of the second spring 304 and causes the limiting block 305 to retract. The pin is inserted until the locking block 307 is aligned with the slot 303. The limiting block 305 then pops out under the action of the second spring 304, thus achieving locking and fixing. The combination of the second spring 304 and the limiting block 305 is flush with the surface of the tray 301 in the normal state. This design makes the insertion and removal of the pin 306 smoother. During disassembly, simply push the limiting block 305 inward to overcome the force of the spring 304, causing the locking block 307 to disengage from the slot 303, and then remove the pin 306 in reverse to remove the pressure sensor 403.

[0024] The auxiliary device 4 includes a connecting sleeve 401, which is mounted on the pin 306. The connecting sleeve 401 is used to dock and fix the pressure sensor. A sealing ring 402 is also installed around the pin 306 on the connecting sleeve 401. The sealing ring 402 provides a sealing effect after the pin 306 is inserted to prevent gas leakage. The connecting sleeve 401 docks with the pressure sensor 403. During installation, the pressure sensor 403 is first reliably connected to the connecting sleeve 401, and then the entire pin 306 is inserted into the tray 301 to complete the fixation.

[0025] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vibration-damping connection device for an intake pressure sensor, characterized in that, include: A primary vibration damping device (1) includes a fixed base (101) and a rubber pad (103) is installed at the bottom of the fixed base (101). A secondary vibration damping device (2) includes connecting blocks (201). The connecting blocks (201) are arranged in groups of four. One group of connecting blocks (201) is installed on a fixed base (101), and the other group of connecting blocks (201) is installed on the bottom surface of a base (204). A spring (202) is provided between two connecting blocks (201). A damping ring (203) is also installed between the fixed base (101) and the base (204). The locking device (3) includes a tray (301), a circular groove (302) is provided in the tray (301), the circular groove (302) is connected to a slot (303), a second spring (304) is provided inside the slot (303), the second spring (304) is connected to a limiting block (305), the circular groove (302) is engaged with a pin (306), and the locking block (307) on the pin (306) is engaged with the slot (303).

2. The vibration-proof connecting device for an intake air pressure sensor according to claim 1, characterized by The primary vibration damping device (1) also includes bolt holes (102), and the bolt holes (102) are arranged in a matrix at the four corners of the fixed base (101).

3. The vibration isolation connecting device for an intake air pressure sensor according to claim 1, characterized by Two trays (301) are symmetrically mounted on the base (204).

4. The vibration-proof connecting device for an intake pressure sensor according to claim 1, characterized by It also includes an auxiliary device (4), which includes a connecting sleeve (401) mounted on a pin (306), and a sealing ring (402) is also mounted around the pin (306) on the connecting sleeve (401).

5. The vibration isolation connecting device for an intake air pressure sensor according to claim 4, characterized by The connecting sleeve (401) docks with the pressure sensor (403).

6. The vibration-proof connecting device for an intake pressure sensor according to claim 1, wherein The combination of the second spring (304) and the limiting block (305) is flush with the surface of the tray (301) under normal conditions.

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