A new manifold sensor fixing structure

Abstract

This utility model relates to the technical field of automotive thermal management, and in particular to a novel manifold sensor fixing structure. Through a threaded tightening fit, supplemented by a bottom sealing ring and a top anti-loosening structure, it achieves a firm, reliable, and sealed connection between the sensor and the manifold, greatly improving sealing performance, eliminating the risk of coolant leakage, and providing strong vibration and impact resistance, ensuring connection reliability under harsh operating conditions. The structure includes a manifold and a sensor, which is mounted on the manifold for convenient manifold pressure detection.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive thermal management, and in particular to a novel manifold sensor fixing structure. Background Technology

[0002] A manifold sensor typically refers to the intake manifold absolute pressure sensor in a car's engine system. Its core function is to measure the absolute pressure inside the intake manifold. This pressure value directly reflects the engine's load status.

[0003] Existing manifold sensor fixing structures, such as the automotive intake manifold gas temperature and pressure sensor device disclosed in utility model patent application number 200720116109.7, mainly include a circuit board fixed inside the lower housing, on which a pressure chip IC is mounted. The second pin of the pressure chip IC is connected to a terminal, the third pin of the pressure chip IC is grounded to the terminal, and the fourth pin of the pressure chip IC is connected to the terminal output. In use, when the intake air temperature is low, the resistance value of the thermistor is high, the signal voltage input by the sensor to the ECU is high, and the ECU controls the engine to increase the fuel injection quantity, and vice versa.

[0004] However, most existing manifold sensors are fixed with snap rings, which have problems such as poor sealing reliability, weak vibration resistance, complex assembly process and low fault tolerance. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a novel manifold sensor fixing structure that achieves a firm, reliable and sealed connection between the sensor and the manifold through a threaded tightening fit, supplemented by a bottom sealing ring and a top anti-loosening structure. This greatly improves the sealing performance, eliminates the risk of coolant leakage, and the threaded connection provides strong vibration and impact resistance, ensuring the reliability of the connection under harsh working conditions.

[0006] This utility model discloses a novel manifold sensor fixing structure, including a manifold and a sensor. The sensor is installed on the manifold and facilitates the detection of manifold pressure. A robotic arm inserts the sensor into the manifold and then rotates the sensor. The sensor and the manifold are connected together by threads, making assembly more convenient and simple. Moreover, the large thread contact area and the self-locking effect generated by the helix angle enable it to resist vibration and impact from all directions. The sensor and the manifold become almost a rigid whole, eliminating the possibility of fretting wear.

[0007] Preferably, the manifold includes a manifold body and a limiting slot. The manifold body is mounted on the vehicle and has mounting holes. The limiting slot is mounted on the manifold body. The sensor is inserted into the mounting holes of the manifold body. The limiting slot provides redundancy for the main threaded connection.

[0008] Preferably, the sensor includes a sensor body, a positioning block, and a sealing ring. The sensor body is inserted into the mounting hole of the manifold body, the positioning block is mounted on the sensor body, and the sealing ring is mounted on the sensor body. The operator installs the sealing ring onto the sensor body, and then the robot grips the sensor body. The vision system positions the starting point of the thread and inserts the sensor body into the mounting hole of the manifold body. Then, it is tightened according to the preset torque and number of rotations.

[0009] Preferably, the manifold body has an internal thread machined in its mounting hole, and the sensor body has an external thread machined thereon, with the internal and external threads connected by a thread. The threaded connection provides a strong axial clamping force that acts directly and evenly on the sealing ring, causing it to undergo controllable and uniform compression deformation in the axial direction. This makes the axial seal easier to control and maintain, and the pressure distribution on the sealing contact surface is more uniform. This effectively avoids the twisting of the sealing ring and local over-compression. Moreover, as long as the thread does not loosen, the sealing pressure can remain stable for a long time, greatly improving the long-term sealing reliability under thermal cycling and pressure pulse conditions, and completely eliminating the risk of refrigerant leakage.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the robot arm inserts the sensor into the manifold and then rotates the sensor. The sensor and the manifold are connected together by threads, making assembly more convenient and simple. Moreover, the huge thread contact area and the self-locking effect generated by the helix angle enable it to resist vibration and impact from all directions. The sensor and the manifold become almost a rigid whole, eliminating the possibility of fretting wear. Attached Figure Description

[0011] Figure 1 This is a partially enlarged split-type isometric structural schematic diagram of this utility model;

[0012] Figure 2 This is a partially enlarged cross-sectional isometric structural schematic diagram of the manifold of this utility model;

[0013] Figure 3 This is a front view structural diagram of the sensor of this utility model;

[0014] Figure 4 This is a partially enlarged isometric view of the combined structure of this utility model.

[0015] The attached diagram is labeled as follows: 01, manifold; 11, manifold body; 12, limit slot; 02, sensor; 21, sensor body; 22, positioning block; 23, sealing ring. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] Example 1

[0018] This utility model discloses a novel manifold sensor fixing structure, including a manifold 01 and a sensor 02, which is installed on the manifold 01 for convenient detection of manifold pressure. The manifold 01 includes a manifold body 11 and a limiting groove 12. The manifold body 11 is installed on a vehicle and has a mounting hole. The limiting groove 12 is installed on the manifold body 11. The sensor 02 includes a sensor body 21, a positioning block 22, and a sealing ring 23. The sensor body 21 is inserted into the mounting hole of the manifold body 11, the positioning block 22 is installed on the sensor body 21, and the sealing ring 23 is installed on the sensor body 21. During operation, the operator first installs the sealing ring 23 onto the sensor body 21. Then, a robotic arm grasps the sensor body 21, and the vision system positions the starting point of the thread to insert the sensor body 21 into the mounting hole of the manifold body 11. Finally, it is tightened according to a preset torque and number of rotations, which greatly improves production efficiency, consistency, and product quality.

[0019] Example 2

[0020] like Figures 1 to 4As shown, this utility model discloses a novel manifold sensor fixing structure, based on embodiment 1. It further includes an internal thread machined into the mounting hole of the manifold body 11 and an external thread machined into the sensor body 21, with the internal and external threads connected by a thread. During operation, the operator first installs the sealing ring 23 onto the sensor body 21. Then, a robotic arm grasps the sensor body 21, and a vision system locates the starting point of the thread, inserting the sensor body 21 into the mounting hole of the manifold body 11. Finally, it is tightened according to a preset torque and number of rotations. This significantly improves production efficiency, consistency, and product quality. The threaded connection provides a powerful axial clamping force, which acts directly and uniformly on the sealing ring. The sealing ring 23 is designed to allow for controllable and uniform compression deformation in the axial direction, making axial sealing easier to control and maintain. The pressure distribution on the sealing contact surface is more uniform, effectively preventing twisting and local over-compression of the sealing ring 23. Moreover, as long as the threads do not loosen, the sealing pressure can remain stable for a long time, greatly improving the long-term sealing reliability under thermal cycling and pressure pulse conditions, and completely eliminating the risk of refrigerant leakage. During maintenance, simply loosen the anti-loosening set screw and then use a wrench to unscrew the sensor body 21 counterclockwise. This will not cause damage to the manifold body 11 or the sensor body 21. After replacement, usually only a new sealing ring 23 needs to be replaced, and the set screw can also be reused or replaced, resulting in extremely low maintenance costs.

[0021] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A new manifold sensor fixing structure, comprising a manifold (01); characterized in that, It also includes a sensor (02), which is mounted on the manifold (01) and facilitates the detection of manifold pressure.

2. The new manifold sensor fixing structure according to claim 1, characterized in that, The manifold (01) includes a manifold body (11) and a limiting slot (12). The manifold body (11) is installed on the vehicle. The manifold body (11) has an installation hole. The limiting slot (12) is installed on the manifold body (11).

3. The novel manifold sensor fixing structure as described in claim 2, characterized in that, The sensor (02) includes a sensor body (21), a positioning block (22) and a sealing ring (23). The sensor body (21) is inserted into the mounting hole of the manifold body (11), the positioning block (22) is mounted on the sensor body (21), and the sealing ring (23) is mounted on the sensor body (21).

4. The novel manifold sensor fixing structure as described in claim 3, characterized in that, It also includes an internal thread machined in the mounting hole of the manifold body (11), an external thread machined on the sensor body (21), and the internal thread and the external thread are connected by a thread.

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