CN-224202629-U - Pressure sensor

CN224202629UCN 224202629 UCN224202629 UCN 224202629UCN-224202629-U

Abstract

The utility model provides a pressure sensor, which relates to the technical field of sensors and comprises a shell, a pressure sensing unit, a support, a circuit board and a plug-in assembly, wherein the shell comprises a first shell and a second shell, one end of the second shell is fixedly connected with the first shell, the pressure sensing unit is provided with a pressure sensing channel and comprises a pressure sensing port, a pressure sensing base and a pressure sensing chip which are fixedly connected together, a containing cavity is formed by surrounding the shell and the pressure sensing base, the pressure sensing port and the pressure sensing chip are positioned in the containing cavity, one end of the support is fixedly connected to the pressure sensing base, the pressure sensing port is positioned in the support, the circuit board is positioned in the containing cavity and is arranged on the support, the plug-in assembly comprises a plastic part and a conducting part positioned in the plastic part, and the plastic part is at least partially attached to the inner side wall of the first shell, and the pressure sensor is convenient to assemble and has good stability.

Inventors

Mao Zhoubin
SUN JIANGTAO

Assignees

中汇瑞德传感科技(苏州)有限公司

Dates

Publication Date: 20260505
Application Date: 20250512
Priority Date: 20241218

Claims (10)

1. A pressure sensor, the pressure sensor comprising: the shell comprises a first shell and a second shell, and one end of the second shell is fixedly connected with the first shell; The pressure sensing unit is provided with a pressure sensing channel, one end of the pressure sensing unit is fixedly connected with the other end of the second shell, the pressure sensing unit comprises a pressure sensing port, a pressure sensing base and a pressure sensing chip which are fixedly connected together, a containing cavity is formed between the shell and the pressure sensing port in a surrounding mode, and the pressure sensing base and the pressure sensing chip are positioned in the containing cavity; the support is positioned in the accommodating cavity, one end of the support is fixedly connected to the pressure sensing port, and the pressure sensing base is positioned in the support; the circuit board is positioned in the accommodating cavity and arranged on the bracket; the connector assembly is arranged in the accommodating cavity and located above the circuit board, the connector assembly comprises a plastic part and a conducting part located inside the plastic part, at least part of the plastic part is attached to the inner side wall of the first shell, and the circuit board is electrically connected with the conducting part and the pressure sensing chip.
2. The pressure sensor of claim 1, wherein the top of the pressure sensing port comprises a center positioning step and an outer edge positioning step, the pressure sensing base is fixedly connected with the center positioning step, and the second shell, the bracket and the outer edge positioning step are fixedly connected.
3. The pressure sensor of claim 2, wherein the centering step comprises a first ring and a second ring, and the pressure sensing base bottom is provided with a stepped notch, the stepped notch matching the first ring and the second ring.
4. The pressure sensor of claim 2, wherein the outer edge positioning step comprises a third ring, a fourth ring and a fifth ring, the bracket bottom is disposed between the third ring and the fourth ring, and the second housing bottom is disposed between the fourth ring and the fifth ring.
5. The pressure sensor of claim 1, wherein the support comprises a support body, a support plate is formed by bending the top of the support body towards the center, a baffle is arranged between the support plates, a through hole is formed in the side wall of the support body, a contact piece is arranged on the through hole, and the contact piece is in contact with the second shell.
6. The pressure sensor of claim 1, wherein the first housing includes a spigot end and a body end, the body end being coupled to the second housing, the plastic member having a boss and an internal bore on a surface adjacent an inner top wall of the body end.
7. The pressure sensor of claim 1, wherein the pressure sensor comprises an elastic member, and both ends of the elastic member are respectively contacted with the conductive member and the circuit board.
8. The pressure sensor of claim 7, wherein the plastic member has a bottom portion with a stopper post, and the elastic member is positioned in the stopper post.
9. The pressure sensor of claim 1, wherein an orifice of reduced inner diameter is disposed in the pressure sensing passageway.
10. The pressure sensor of claim 6, wherein the conductive member communicates with the bottom of the bore.

Description

Pressure sensor Technical Field The utility model relates to the technical field of sensors, in particular to a pressure sensor. Background In hydraulic control systems of industrial and engineering machines, pressure sensors are required for monitoring the system pressure feedback to the control unit in real time. The hydraulic pressure sensor applied to the market at present has complex design and high cost. The sensor generally needs an upper PCB circuit board and a lower PCB circuit board, and also needs a terminal connected between the two PCB circuit boards. And because there is no reliable electrical ground between the PCB circuit board and the sensor housing, a separate design is required to leave the PCB circuit board grounded, and because the hydraulic control system requires multiple sensors, the high sensor cost is one of the pain points of interest in the industry. Disclosure of utility model The utility model aims to overcome the defects of the prior art, provides a pressure sensor, and can solve the problems of complex structural design and high cost of the pressure sensor for a hydraulic control system in the prior art. In order to achieve the above and other objects, the utility model provides a pressure sensor, which comprises a shell, a pressure sensing unit, a circuit board, a connector assembly and a connector assembly, wherein the shell comprises a first shell and a second shell, one end of the second shell is fixedly connected with the first shell, the pressure sensing unit is provided with a pressure sensing channel, one end of the pressure sensing unit is fixedly connected with the other end of the second shell, the pressure sensing unit comprises a pressure sensing port, a pressure sensing base and a pressure sensing chip which are fixedly connected together, a containing cavity is formed between the shell and the pressure sensing port in a surrounding manner, the pressure sensing base and the pressure sensing chip are positioned in the containing cavity, one end of the support is fixedly connected to the pressure sensing port, the pressure sensing base is positioned in the support, the circuit board is positioned in the containing cavity and is arranged on the support, the connector assembly is arranged in the containing cavity and is positioned above the circuit board, and the connector assembly comprises a plastic part, the plastic part and at least one plastic part is positioned in the plastic part and is in contact with the plastic part, and at least one plastic part is connected with the plastic part. The utility model designs the pressure sensor, which greatly simplifies the number of parts and the assembly process of the sensor. The sensor consists of a pressure sensing unit, an electrical conditioning module, a connector assembly, an elastic piece, a shell and other main parts. The pressure sensing unit consists of a split pressure sensing end and a pressure sensing chip. The split pressure sensing end can ensure the uniformity of the design and the materials of the pressure sensing base, the pressure sensing port can be customized, and the cost advantage is larger. Besides pressure sensing characteristics, the pressure sensing port is also integrated with the characteristics of a mounted threaded interface, a seal interface, a mounted hexagonal and the like, and an integrated throttle valve can be optionally matched, so that the capacity of the sensor for resisting rapid pressure pulse of the system is stronger. The electric conditioning module mainly comprises electronic devices such as a metal bracket, a circuit board, a conditioning chip and the like, wherein a small flanging contact piece arranged on the bracket has the function of grounding, and in addition, the electric conditioning module can also play the role of overcoming elastic force to fix the shell during assembly. The metal support plays a role in supporting the PCB and providing an interface for welding with the pressure sensing unit, and meanwhile, the metal support welded with the pressure sensing unit can meet the grounding problem of the PCB, and the design characteristics for grounding are not needed independently. A small window is formed in the PCB, and space is provided for electric connection between the pressure sensing chip and the PCB. Meanwhile, the PCB is also provided with a plurality of circular copper leakage openings for electrical connection with the elastic piece. In order to meet the maximum compression condition of the elastic piece, the mechanical strength of the PCB is generally that a supporting surface of the supporting frame is arranged near the bottom surface of the copper leakage opening. The support interface for the PCB can well support the PCB, and can provide enough space for the electric components for the front side and the back side of the PCB, so that the sensor only needs to use one PCB, the design is greatly simplified, and the cost can be saved. The connector assembl