Linear displacement sensor with built-in wiring terminal
By using built-in terminals in the online displacement sensor and adopting multi-layer sealing structure and laser welding technology, the problem of insufficient sealing in high-temperature and high-pressure environments is solved, significantly improving the stability and electrical performance of the sensor, ensuring accuracy and service life.
Patent Information
- Application Number
- CN202421098459.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Existing linear displacement sensors lack sealing and stability in high temperature and high pressure environments, which can easily cause liquids to enter the product, affecting accuracy and life.
A wire displacement sensor with built-in terminals is designed, using stopping pressure plate, stopping pressure ring, sealing joint and sealing ring, combined with laser welding technology, enhances sealing and structural stability, and passes through hollow needles. and glass insulators improve electrical performance.
It significantly improves the sealing and stability of the sensor in harsh environments, prevents liquid from entering, ensures accuracy and service life, while enhancing electrical performance and connection firmness.
Smart Images
Figure CN222231612U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensors, in particular to a linear displacement sensor with built-in wiring terminals. Background Art
[0002] Linear displacement sensors are important tools for measuring the position change of objects and are widely used in aviation, industrial automation, medical equipment and other fields. In particular, in the fly-by-wire flight control system and engine system of aircraft, the role of linear displacement sensors is particularly critical, and they are used to accurately measure parameters such as elongation, vibration, and expansion, thereby ensuring the safety and performance of the aircraft.
[0003] However, the sealing and stability of linear displacement sensors currently on the market often cannot meet actual needs when dealing with harsh environments such as high temperature and high pressure. This is mainly due to the design problems of the lead wires of traditional sensors. Specifically, the lead wires of existing sensors are usually directly led out from the coil assembly. This simple structure has poor sealing in environments such as high-pressure oil chambers or deep water, which can easily cause liquids such as fuel (gas) or water to enter the product along the cable.
[0004] Under high temperature and high pressure environment, the liquid entering the product may cause displacement of internal parts due to expansion, thus affecting the accuracy and stability of the sensor. More seriously, after the fuel (gas) enters the coil along the cable, the volume will change when the temperature changes due to the principle of thermal expansion and contraction. This volume change will cause displacement and stress in the solder joint, which may cause a break between the lead wire solder joint and the enameled wire, seriously affecting the service life and performance of the sensor. Utility Model Content
[0005] The purpose of the utility model is to provide a linear displacement sensor with built-in wiring terminals to solve the problem proposed in the above background technology that volume changes will drive the soldering point to generate displacement and stress, which may further cause breakage between the lead wire soldering point and the enameled wire, seriously affecting the service life and performance of the sensor.
[0006] To achieve the above-mentioned purpose, the utility model provides a linear displacement sensor with built-in wiring terminals, including a shell, a coil assembly is arranged inside the shell, a stopping pressure plate is installed at the end of the shell, a stopping pressure ring is arranged on the outside of the stopping pressure plate, a rear end cover is installed on the outside of the stopping pressure ring, a wiring terminal is installed on the upper part of the interior of the shell, a terminal stopping ring is installed on the outside of the wiring terminal, a terminal pressure ring is installed on the outside of the terminal stopping ring, a rear end cover plug sleeve is installed in the middle part of the outer side of the stopping pressure ring, and a rear end cover plug is installed on the rear end cover plug sleeve.
[0007] Preferably, the coil assembly is connected to one end of a wiring terminal through wiring, and the other end of the wiring terminal is connected to a lead wire.
[0008] Preferably, a sealing joint is installed on the outer side of the upper part of the shell, and the outer end of the lead wire passes through the middle of the sealing joint.
[0009] Preferably, a sealing ring is installed on the side of the sealing joint close to the inner wall of the shell.
[0010] Preferably, the connection terminal comprises a base, and a plurality of lead pins are mounted on the front side of the base.
[0011] Preferably, the interior of the lead pin is a hollow structure, the lead pin passes through the base body, and a glass insulator is sleeved near the base body.
[0012] Preferably, one side of the connection terminal is fixed to the lead wire by welding, and the connection terminal and the inner wall of the shell are welded by laser.
[0013] Preferably, a wire hole is provided at one end of the housing away from the rear end cover.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] The unique design and layout of the linear displacement sensor with built-in wiring terminals significantly improves the sealing and stability of the sensor in harsh environments such as high temperature and high pressure. First, by building the wiring terminals into the sensor housing and fixing them with terminal retaining rings and terminal pressure rings, the lead wires are effectively prevented from loosening and being damaged in harsh environments, thereby enhancing the structural stability of the sensor.
[0016] Secondly, the sensor is equipped with a sealing joint on the outer side of the upper shell, and a sealing ring is set at the lead-out position, forming a double sealing protection, which greatly improves the sealing performance of the sensor. This design effectively prevents liquids such as fuel (gas) or water from entering the sensor along the cable, thereby avoiding the displacement of internal parts due to liquid expansion, ensuring the accuracy and stability of the sensor in high temperature and high pressure environments.
[0017] In addition, the special design of the terminal block further enhances the performance of the sensor. The hollow structure of the lead pin and the use of glass insulators not only improve the electrical performance of the terminal block, but also effectively prevent the occurrence of electrical failures. At the same time, the laser welding of the terminal block and the inner wall of the shell ensures the firmness and sealing of the connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;
[0020] Figure 3 It is a schematic diagram of the structure of the wiring terminal in the utility model;
[0021] Figure 4 It is a schematic diagram of the assembly of the housing in the utility model.
[0022] The meaning of each number in the figure is:
[0023] 1. Shell; 2. Coil assembly; 3. Stopping pressure plate; 4. Stopping pressure ring; 5. Rear end cover plug sleeve; 6. Rear end cover; 7. Rear end cover plug; 8. Terminal pressure ring; 9. Terminal stopping ring; 10. Wiring terminal; 101. Base; 102. Glass insulator; 103. Lead pin; 11. Sealing ring; 12. Sealing joint; 13. Lead wire. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] The utility model provides a linear displacement sensor with a built-in wiring terminal, such as Figure 1-Figure 4 As shown, it includes a shell 1, a coil assembly 2 is arranged inside the shell 1, a stopping pressure plate 3 is installed at the end of the shell 1, a stopping pressure ring 4 is arranged on the outer side of the stopping pressure plate 3, a rear end cover 6 is installed on the outer side of the stopping pressure ring 4, a wiring terminal 10 is installed on the upper part of the interior of the shell 1, a terminal stopping ring 9 is installed on the outer side of the wiring terminal 10, a terminal pressure ring 8 is installed on the outer side of the terminal stopping ring 9, a rear end cover plug sleeve 5 is installed in the middle part of the outer side of the stopping pressure ring 4, and a rear end cover plug 7 is installed on the rear end cover plug sleeve 5.
[0026] The terminal block 10 can effectively prevent liquid or gas from leaking and entering the interior of the product, thereby improving the reliability of the product. Since it can effectively prevent liquid or gas from entering the interior of the product, the internal components of the product are not easily affected by harsh environments such as pollution or corrosion, thereby improving the durability and service life of the product. It can provide reliable conductivity to ensure a stable connection between the cable and the internal equipment of the product, and is suitable for conventional power and communication and high-sealing products, as well as special environments such as oil, gas and aerospace.
[0027] In this embodiment, the coil assembly 2 is connected to one end of the wiring terminal 10 through wiring, and the other end of the wiring terminal 10 is connected to a lead wire 13 .
[0028] Specifically, a sealing joint 12 is installed on the outer side of the upper part of the housing 1, and the outer end of the lead wire 13 passes through the middle of the sealing joint 12 to facilitate wiring.
[0029] Furthermore, a sealing ring 11 is installed on the side of the sealing joint 12 close to the inner wall of the housing 1 to ensure the sealing effect.
[0030] Furthermore, the connection terminal 10 includes a base body 101 , and a plurality of lead pins 103 are mounted on the front side of the base body 101 to facilitate the lead operation.
[0031] Furthermore, the interior of the lead pin 103 is a hollow structure, the lead pin 103 passes through the base body 101, and a glass insulator 102 is sleeved near the base body 101 to ensure the insulation effect.
[0032] Furthermore, one side of the connection terminal 10 is welded and fixed to the lead wire 13, and the connection terminal 10 and the inner wall of the housing 1 are welded by laser to ensure stable installation of various components.
[0033] Furthermore, a wire hole is provided at one end of the housing 1 away from the rear end cover 6 for the wire to pass through.
[0034] When the linear displacement sensor with built-in wiring terminals of the utility model is used, first, after the coil component 2 is assembled and debugged, the wiring terminal 10 is connected with the coil component 2 and the lead wire 13. After the connection is completed, it is installed into the housing 1 together with the terminal stopping ring 9 and the terminal pressing ring 8, and then the wiring terminal 10 and the housing 1 are laser welded, and the stopping pressing plate 3 is inserted (two cables are respectively passed through the lead holes), and the position of the stopping pressing plate 3 is adjusted so that a protruding part of the stopping pressing plate 3 is stuck in the groove of the housing 1; the stopping pressing ring 4 is screwed in, and the stopping pressing ring 4 is tightened with a tightening tool, and the O-shaped sealing ring 11 is installed on the sealing joint 12, and then the sealing joint 12 is installed in the housing 1, and the rear end cover plug 7 is mounted on the rear end cover 6 and fixed by laser welding, and then vacuum glue is poured, and the residual glue on the shell is cleaned before entering the subsequent product test.
[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A linear displacement sensor with a built-in terminal, comprising a housing (1), characterized in that: A coil assembly (2) is arranged inside the shell (1); a stop pressure plate (3) is installed at the end of the shell (1); a stop pressure ring (4) is arranged on the outer side of the stop pressure plate (3); a rear end cover (6) is installed on the outer side of the stop pressure ring (4); a wiring terminal (10) is installed on the upper part of the inside of the shell (1); a terminal stop ring (9) is installed on the outer side of the wiring terminal (10); a terminal pressure ring (8) is installed on the outer side of the terminal stop ring (9); a rear end cover plug sleeve (5) is installed in the middle of the outer side of the stop pressure ring (4); and a rear end cover plug (7) is installed on the rear end cover plug sleeve (5).
2. The linear displacement sensor with built-in wiring terminals according to claim 1, characterized in that: The coil assembly (2) is connected to one end of a connection terminal (10) through wiring, and the other end of the connection terminal (10) is connected to a lead wire (13).
3. The linear displacement sensor with built-in wiring terminals according to claim 2, characterized in that: A sealing joint (12) is installed on the outer side of the upper part of the housing (1), and the outer end of the lead wire (13) passes through the middle part of the sealing joint (12).
4. The linear displacement sensor with built-in wiring terminals according to claim 3, characterized in that: A sealing ring (11) is installed on the side of the sealing joint (12) close to the inner wall of the housing (1).
5. The linear displacement sensor with built-in wiring terminals according to claim 1, characterized in that: The connection terminal (10) comprises a base body (101), and a plurality of lead pins (103) are mounted on the front side of the base body (101).
6. The linear displacement sensor with built-in wiring terminals according to claim 5, characterized in that: The interior of the lead pin (103) is a hollow structure. The lead pin (103) penetrates the base body (101), and a glass insulator (102) is sleeved near the base body (101).
7. The linear displacement sensor with built-in wiring terminals according to claim 1, characterized in that: One side of the connection terminal (10) is welded and fixed to the lead wire (13), and the connection terminal (10) and the inner wall of the housing (1) are welded by laser.
8. The linear displacement sensor with built-in wiring terminals according to claim 1, characterized in that: A lead hole is provided at one end of the housing (1) away from the rear end cover (6).