A quick-connection sensor structure

Abstract

This utility model discloses a quick-connection sensor structure, including a sensor body, a shaped cable clamping structure, and a cable locking nut. One end of the shaped cable clamping structure is inserted into the wiring cavity of the sensor body, and the other end is inserted into the cable locking nut. The outer wall of the sensor body and the cable locking nut are connected by threads. The sensor body contains circuit components and connected piercing terminals. A guide protrusion structure is provided axially within the wiring cavity, and a corresponding guide groove is provided on the outer wall of the shaped cable clamping structure. The two work together to restrict the rotation of the clamping structure. The exposed wire of the client cable passes through and is clamped and fixed by the shaped cable clamping structure. During the locking process between the cable locking nut and the sensor body, the piercing terminal automatically pierces the insulation of the wire and achieves a reliable electrical connection with the wire core. This utility model enables quick-connection of the sensor.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a quick-connection sensor structure. Background Technology

[0002] In the field of industrial automation and electrical equipment, sensors, as core components for signal acquisition and transmission, directly impact the installation efficiency, operational reliability, and maintenance costs of equipment due to the rationality of their wiring structure. As industrial applications demand increasing flexibility and stability from sensors, existing sensor wiring methods are gradually revealing numerous technical shortcomings, failing to meet the demands for efficient and low-cost operation. Existing sensor wiring methods can be broadly categorized as follows, each with its own significant deficiencies: Firstly, there are direct-wire sensors. These sensors require soldering or additional industrial connectors for wiring when used by the client. Scenario one involves direct wire bonding, which requires operators with specialized soldering skills. Furthermore, the soldered area has poor vibration resistance, and prolonged use can easily lead to poor contact due to vibration. Directly soldered conductor connections occur at only one point, such as... Figure 1 As shown by the dots in the diagram; Scenario 2 involves installing industrial connectors and wiring, while Scenario 3 requires installing connectors to connect to equipment. This not only increases the cost of connector procurement but also necessitates additional mechanical connection structures and waterproof / dustproof sealing designs. The assembly process requires specialized tools, is complex, and demands a high level of expertise from the operators. In Scenario 2, there are three conductor connections during the wiring process, as shown in the diagram. Figure 2 The dots in the image are shown.

[0003] Secondly, there are sensors with industrial connector mating interfaces. Clients need to connect the sensor to the interface using the matching connector. While this simplifies some assembly steps, it still requires ensuring accurate connector matching, leading to poor connector compatibility: different connector specifications are difficult to interchange, increasing the difficulty of selection and replacement costs for users. Furthermore, the two conductor connection points—between the connector and cable, and between the connector and sensor interface—pose risks of poor contact, seal failure, or electromagnetic shielding failure, resulting in reduced wiring reliability. The wiring process for sensors with industrial connector mating interfaces involves three conductor connections, such as... Figure 3 The dots in the image are shown.

[0004] Third, sensors with cables and connectors. These sensors require pairing with the client's connector or device panel interface via the product's built-in connector. The wiring process involves at least three conductor connections (e.g., Figure 4 As shown by the dots, including internal cables of the sensor, product connectors, and client connectors, the increased number of connection points directly increases the probability of failure; moreover, the multi-stage mechanical fixing and sealing design further increases production and usage costs, while extending the product supply cycle and reducing wiring flexibility.

[0005] In summary, existing sensor wiring methods generally suffer from the following common problems: complex installation and operation, relying on specialized tools and technicians; poor connector versatility, resulting in high operating costs; numerous conductor connection points (2-3 points), leading to significant risks such as poor contact and sealing failure, as well as low vibration resistance and wiring stability; and a complex product line, hindering production management and customer selection. Therefore, there is an urgent need for a sensor wiring structure that simplifies the wiring process, reduces the number of connection points, lowers the operational threshold, and improves reliability, thereby addressing the pain points of existing technologies. Utility Model Content

[0006] To address the aforementioned technical problems, the technical solution adopted by this utility model is as follows: This utility model embodiment provides a quick-connection sensor structure, which includes: a sensor body, a shaped cable clamping structure, and a cable locking nut. One end of the shaped cable clamping structure is inserted into the wiring cavity of the sensor body, and the other end is inserted into the cable locking nut. The outer wall of the sensor body is threadedly connected to the cable locking nut. The sensor body contains a circuit assembly and a piercing terminal connected to the circuit assembly. The wiring cavity of the sensor body contains an axially extending guide protrusion. The outer wall of the shaped cable clamping structure has a guide groove adapted to the guide protrusion. The guide protrusion and the guide groove cooperate to restrict the rotation of the shaped cable clamping structure. The exposed wire of the client cable passes through the shaped cable clamping structure and is clamped and fixed on the shaped cable clamping structure. During the locking process of the cable locking nut and the sensor body, the piercing terminal pierces the insulation of the wire and is electrically connected to the wire core.

[0007] This utility model has at least the following beneficial effects: (1) Improve wiring efficiency and convenience: The cable locking nut and the sensor body thread locking drive the piercing terminal to automatically complete the wire insulation layer piercing and electrical connection. No welding or special tools are required, simplifying the wiring process, reducing the dependence on the professional skills of operators, and significantly improving the on-site wiring efficiency.

[0008] (2) Enhance connection stability and reliability: The cooperation between the guide protrusion structure and the guide groove restricts the rotation of the irregular cable clamping structure, ensuring accurate alignment between the piercing terminal and the wire, and avoiding piercing failure due to rotational offset; the synergistic effect of the irregular cable clamping structure on the stable clamping of the wire and the electrical connection of the piercing terminal reduces the risk of poor contact in traditional multi-connection point scenarios and greatly improves wiring stability.

[0009] (3) Reduce costs and broaden applicability: No additional connectors are required to achieve wire connection, reducing material and usage costs; the structural design is adapted to the direct connection needs of bare wires of the client, simplifying product line management, making it easier for users to choose flexibly, and shortening the product supply cycle.

[0010] (4) Optimize vibration resistance and anti-detachment performance: The irregular cable clamping structure forms a double stable structure for clamping and fixing the wire and piercing the terminal electrical connection, which effectively prevents the wire from coming off under vibration, impact and other working conditions, solves the problem of poor vibration resistance of traditional welding wiring, and improves the reliability of the sensor in complex environments.

[0011] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figures 1 to 4 Wiring diagram for existing sensors; Figure 5 and Figure 6 This is a schematic diagram of the sensor structure provided in an embodiment of the present utility model; Figure 7 A schematic diagram illustrating the process of piercing a wire to penetrate a terminal; Figure 8 This is a side view of the irregular cable clamping structure; Figure 9 This is a side view of the irregular cable clamping structure. Detailed Implementation

[0014] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0016] It should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the steps as sequential processes, many of these steps can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the steps can be rearranged. A process can be terminated when its operation is complete, but it may also have additional steps not included in the figures. A process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0017] This utility model discloses a quick-connection sensor structure, which aims to solve the problems of low wiring efficiency, high cost and poor reliability of existing sensors.

[0018] like Figures 5 to 9 As shown, the quick-connection sensor structure provided in this embodiment of the utility model includes: a sensor body 1, an irregular cable clamping structure 2, and a cable locking nut 3.

[0019] In this embodiment of the invention, the sensor body and the cable locking nut are made of metal.

[0020] The irregular cable clamping structure 2 has one end inserted into the wiring cavity of the sensor body and the other end inserted into the cable locking nut 3. The outer wall of the sensor body 1 is threadedly connected to the cable locking nut 3. The sensor body 1 contains a circuit assembly (not shown) and a piercing terminal 4 connected to the circuit assembly. The wiring cavity of the sensor body 1 contains an axially extending guide protrusion structure 5. The outer wall of the irregular cable clamping structure has a guide groove 6 adapted to the guide protrusion structure. The guide protrusion structure 5 and the guide groove 6 cooperate to restrict the rotation of the irregular cable clamping structure. The exposed wire 8 of the client cable 7 passes through the irregular cable clamping structure and is clamped and fixed on the irregular cable clamping structure 2. During the locking process of the cable locking nut 3 and the sensor body 1, the piercing terminal pierces the insulation sheath of the wire and is electrically connected to the wire core 9.

[0021] In this embodiment of the utility model, the piercing terminal replaces the traditional pin-type connection structure in the sensor. The piercing terminal 4 may include a terminal holder (not shown), a terminal connection part (not shown), and a wire piercing part 10. One end of the terminal connection part is connected to the terminal holder, and the other end is connected to the copper foil of the PCB board. The wire piercing part is connected to the terminal holder.

[0022] In this embodiment of the invention, the terminal retainer is made of an insulating material, such as LCP plastic, to provide mechanical support and insulation.

[0023] In this embodiment of the utility model, the edge of the terminal connection part is provided with a barbed protrusion. The height of the protrusion can be 0.1~0.2mm, and the barb angle can be 45°~60°. The corresponding position of the terminal retainer is provided with a matching groove. The groove depth is 0.2~0.3mm, and the inner wall is provided with anti-slip texture. During assembly, the protrusion is embedded into the groove through elastic deformation to form an irreversible mechanical lock, preventing the connection from loosening due to vibration.

[0024] In one embodiment of this utility model, the terminal connection portion is soldered onto the pads on the PCB board by welding.

[0025] In another embodiment of this utility model, the terminal connection part is an integral extension of the copper foil of the circuit board. The edge of the terminal connection part is provided with a stepped positioning groove that precisely matches the edge contour of the circuit board. The groove width of the positioning groove forms a slight interference fit with the width of the positioning boss preset on the circuit board, and the interference is 0.02-0.05mm. The positioning groove is continuously distributed along the edge of the terminal connection part. After being fitted with the positioning boss, the metal deformation stress formed by the etching process realizes the rigid connection between the terminal and the circuit board without offset, eliminating the gap error caused by traditional pin assembly.

[0026] In this embodiment of the utility model, the wire piercing part is integrally formed with the terminal retainer through injection molding insert process (or laser welding): if it is an injection molding insert, the metal piercing part is directly embedded during the injection molding of the retainer; if it is welding, laser deep penetration welding is used to achieve the metallurgical combination of the two.

[0027] In this embodiment of the utility model, such as Figure 7 As shown, the wire piercing part 10 is provided with a V-shaped guide opening 11, a wire clamping groove 12 and a transition groove 13 that are connected sequentially along the wire insertion direction.

[0028] Furthermore, the included angle of the V-shaped guide opening 11 can be 60~90°, preferably 75°, the two guide surfaces are symmetrical inclined planes, the opening depth can be 1.5d~2d, where d is the diameter of the conductor core, and the guide surface length can be 3~5mm. It extends inward from the opening end and smoothly transitions to the inlet of the clamping groove, forming a guide channel with a wide inlet and narrow transition, guiding the conductor to be accurately aligned. The end of the V-shaped guide opening (near the inlet of the clamping groove) is provided with a sharp piercing edge, and the included angle between the edge and the tangent of the V-shaped guide surface can be 30~45°. When the conductor is introduced through the V-shaped guide opening, the insulation layer first contacts the V-shaped guide surface and is "aligned and limited". As the locking force advances, the edge gradually cuts into the insulation layer from both sides (rather than breaking instantly), avoiding the conductor core from fraying or being damaged.

[0029] The wire clamping groove has a long, narrow opening (rectangular cross-section), and its entrance smoothly connects to the end of the V-shaped guide opening (with a transition fillet radius of 0.5mm), ensuring unobstructed entry of the conductor after passing through the V-shaped guide opening. Two sets (four in total) of elastic arc-shaped protrusions are symmetrically distributed on the inner wall of the wire clamping groove. The protrusions are equidistant along the axial direction, adapting to the rectangular cross-section of the long, narrow opening: the protrusion cross-section is semi-circular with a radius of 0.3~0.5d, and a 0.1~0.2mm thick elastic cantilever structure is formed through etching thinning, with a radial restoring force greater than or equal to 1N; the protrusion height is 0.1~0.2d, and the circumferential spacing between two opposing protrusions is d×k, 0.5≤k≤0.8, preferably 0.6≤k≤0.65. Radial clamping is achieved through interference deformation, ensuring stable contact of the conductor core. A barbed structure is provided at the connection between the wire clamping groove and the transition groove.

[0030] During the locking process, the wire is guided by the wedge-shaped cutting edge of the V-shaped guide opening to pierce the insulation layer, then embedded in the clamping groove. It is then secured by a double clamping structure formed by the elastic arc-shaped protrusion and barbs, achieving a stable electrical connection with the pierced part of the wire. Specifically, the curved surface of the arc-shaped protrusion fits snugly against the outer circle of the wire core (increasing the contact area by 40%), and the tip of the barb forms point contact with the wire core (contact pressure ≥5N / mm²). This double contact structure ensures a contact resistance ≤5mΩ (1 / 3 to 1 / 2 of the contact resistance of traditional pins), guaranteeing the stability of signal transmission.

[0031] In this embodiment of the invention, the transition groove is used to increase the elasticity of the wire clamping groove. The specific dimensions can be set based on actual needs, as long as the elasticity of the wire clamping groove is increased. The width of the transition groove is greater than the width of the wire clamping groove, providing space for elastic deformation. In one illustrative embodiment, the width of the transition groove is equal to the width of the wire clamping groove plus 0.2~0.4d. This increased width provides deformation buffer space for the elastic arc-shaped protrusion of the wire clamping groove. When the wire is embedded in the wire clamping groove, the elastic protrusion undergoes radial deformation due to compression. The wide design of the transition groove prevents the protrusion deformation from being rigidly constrained by the groove wall, increasing the elastic recovery force of the wire clamping groove by 20%~30%, making it more suitable for interference clamping requirements of multi-specification wire cores.

[0032] In this embodiment of the utility model, when the cable locking nut drives the irregular cable clamping structure to push the wire, the wire is first guided by the V-shaped guide opening and constrained by the anti-slip texture to achieve directional breakage of the insulation layer; then it is embedded in the clamping groove, the elastic arc protrusion contracts radially → rebounds and hugs, the barbs simultaneously complete the bending → locking, and finally form an integrated connection of mechanical fixed connection and low resistance electrical connection. No manual intervention is required throughout the process, and the wiring time is ≤5s (80% shorter than traditional welding).

[0033] Furthermore, in one embodiment of this utility model, the guide protrusion structure 5 is a long strip protrusion with a trapezoidal interface extending along the axial direction of the sensor body, and the guide groove is a groove that is adapted to the guide protrusion structure and is set along the axial direction of the irregular cable clamping structure.

[0034] Furthermore, the connection between the outer wall of the sensor body 1 and the cable locking nut is provided with an anti-loosening structure (not shown). The anti-loosening structure includes: n metal elastic ribs evenly distributed circumferentially in the non-threaded area of ​​the inner wall of the cable locking nut, and n annular micro-grooves provided at corresponding positions on the outer wall of the sensor body; the free state height of the metal elastic ribs is greater than the groove depth, and after assembly, the metal elastic ribs elastically embed into the annular micro-grooves to form radial clamping.

[0035] In this embodiment of the invention, n satisfies n≥f / 10, where f is the vibration frequency of the sensor's operating environment, in Hz.

[0036] In this embodiment of the invention, the non-threaded area of ​​the inner wall of the cable locking nut is close to the opening end of the nut, 2-3 mm away from the thread termination end. The metal elastic rib adopts a stamped cantilever structure, integrally stamped from the inner wall of the cable locking nut (material selected from 65Mn spring steel or 304 stainless steel, with good elastic recovery performance). The rib has a semi-circular cross-section with a radius of 0.1-0.15 mm and a rounded top to avoid scratching the sensor body during assembly. The root of the rib is formed into an elastic cantilever through a local thinning process, with a root thickness of 0.1-0.2 mm and a length of 2-3 mm, giving the rib radial elastic deformation capability, with a maximum deformation ≥0.3 mm. The circumferential spacing between adjacent ribs can be 360° / n to ensure uniform stress distribution and avoid local stress concentration.

[0037] The free height of the metal elastic rib can be 0.15~0.2mm, forming an interference fit of 0.03~0.1mm. During assembly, the rib is squeezed by the outer wall of the sensor body to generate radial elastic deformation. After being embedded in the groove, it forms a single clamping force of 1.5~2.5N (metal materials have higher rigidity, and the clamping force is 30%~50% higher than that of plastic ribs), ensuring the reliability of anti-loosening under vibration conditions.

[0038] In this embodiment of the invention, the n annular micro-grooves are n concentric annular micro-grooves. The groove cross-section is a semi-circular arc with a radius of 0.1~0.12mm, the groove depth is 0.1~0.12mm, and the width is adapted to the length of the rib (2~3mm). They are formed by CNC milling or laser engraving, and the groove wall roughness Ra≤1.6μm to reduce assembly friction.

[0039] In this embodiment of the invention, the core design logic of n satisfying n≥f / 10 is based on vibration energy dispersion and fatigue failure prevention: When the ambient vibration frequency f is high, such as f=50~200Hz commonly seen in industrial equipment, it is necessary to increase the number of ribs n, such as n≥10 when f=100Hz, to disperse the vibration energy at multiple points, that is, to distribute the axial impact force generated by the vibration to more rib-groove meshing points, so as to avoid plastic deformation or breakage of a single set of ribs due to force concentration. When f is low, such as f=10~50Hz, n can be appropriately reduced, such as n≥3 when f=30Hz, to simplify the process while ensuring the anti-loosening effect and balance cost and performance.

[0040] In practical applications, n is taken as an integer and ≥3 (the minimum number ensures circumferential symmetrical force). For example, in a scenario with a vibration frequency of 150Hz, n=15 (15≥150 / 10) to achieve dynamic adaptation of high-frequency vibration and multi-point dispersion.

[0041] In this embodiment of the utility model, the anti-loosening principle between the sensor body and the cable locking nut is a dual guarantee of thread pre-tightening and elastic locking. Specifically, the cable locking nut and the sensor body are connected by threads to form an initial pre-tightening force, ensuring reliable contact between the piercing terminal and the wire. Specifically, the outer side of the sensor body is provided with an external thread 14, and the inner wall of the locking nut is provided with an internal thread 15. After assembly, the ribs elastically embed into the grooves under the interference fit, forming radially evenly distributed locking points. When the nut tends to loosen due to vibration (axial rotation), the ribs and the arc surfaces of the grooves are relatively squeezed, and the elastic restoring force of the ribs is converted into circumferential friction torque (friction torque of a single meshing point M=0.01~0.02N・m), which hinders the rotation of the nut. During vibration, the metal elastic ribs undergo "compression-rebound" elastic deformation with the slight displacement of the nut, which consumes vibration energy through material internal friction and avoids the accumulation of loosening tendency. Compared with traditional threaded connections without anti-loosening structure, the anti-loosening life is increased by 5 to 10 times. Among them, under the conditions of vibration acceleration of 10g and frequency of 100Hz, the no-loosening time is extended from 200h to more than 1000h.

[0042] In this embodiment of the invention, the anti-loosening structure and the guide protrusion-guide groove limiting structure work in a "dual cooperation" manner. The guide protrusion and guide groove restrict the rotation of the irregularly shaped cable clamping structure, ensuring accurate alignment of the piercing terminal. The rib-groove anti-loosening structure restricts the loosening of the cable locking nut, ensuring stable thread preload and preventing insufficient piercing pressure and increased contact resistance due to nut loosening. Together, they form a closed loop of limiting, anti-loosening, and pressure maintaining, achieving the technical objective of improving wiring reliability and vibration resistance at the structural level.

[0043] In this embodiment of the invention, the anti-loosening structure overcomes the limitations of traditional threaded connections, which rely on preload and are prone to failure due to vibration, through the design of elastic ribs interfering with the groove. It offers the following advantages: Dynamic adaptation to vibration environments: The n-value is linked to the vibration frequency, enabling on-demand protection and covering common vibration scenarios in industrial equipment; Zero additional cost: The rib and groove are integrally formed through injection molding / milling, eliminating the need for spring washers, anti-loosening adhesives, and other accessories, simplifying the structure; Convenient assembly: The deformation of the elastic rib does not affect the normal tightening of the nut (assembly torque increase ≤10%), maintaining the core requirement of "quick wiring." Ultimately, it provides crucial structural support for the stable operation of sensors under complex conditions such as vibration and impact.

[0044] Furthermore, the irregular cable clamping structure 2 may include a hollow wire clamping end and a cable clamping end. The wire clamping end is inserted into the wiring cavity, and the cable clamping end is inserted into the cable locking nut. A cable sealing ring 16 is provided in the cable clamping end. The cable 7 passes through the cable sealing ring and is clamped and fixed in the cable sealing ring 16. The wire is clamped and fixed on the wire clamping end. In this embodiment of the present invention, the cable sealing ring 16 may be a rubber ring.

[0045] Furthermore, such as Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the wire clamping end may include a wire clamping base 51 and a wire clamping cylinder 52 connected to the wire clamping base. A sealing element (not shown) is provided on the wire clamping base. The sealing element may be an O-ring rubber seal, disposed within a groove in the wire clamping base 51, with the wire diameter of the sealing element being greater than the depth of the groove. When the wire clamping end is inserted into the housing, the inner wall of the housing compresses the sealing element, achieving a dustproof and waterproof seal.

[0046] The wire clamping cylinder 52 has m wire clamping portions arranged circumferentially. Each wire clamping portion includes a first inclined portion 53 and a second inclined portion 54 that are inclined outward relative to the axial direction of the wire clamping cylinder. The first inclined portion 53 and the second inclined portion 54 are spaced apart, and the included angle between the first inclined portion 53 and the second inclined portion 54 is greater than 90° but less than 180°. The wire clamping cylinder has multiple guide grooves arranged circumferentially, and each guide groove is arranged between two adjacent wire clamping portions.

[0047] The first inclined portion 53 has a first inclined guide surface 5301 at its top and a first groove 5302, a first side surface 5303, and a first notch 5304 connected in sequence on its side. The second inclined portion has a second inclined guide surface 5401 at its top and a second groove 5402, a second side surface 5403, and a second notch 5404 connected in sequence on its side. The first and second inclined guide surfaces cooperate to form a V-shaped guide channel, and the first and second grooves cooperate to form a flared channel. The first and second side surfaces are parallel to the axial direction of the first fixed end and cooperate to form a clamping channel. The first and second notches cooperate to form a notch portion. The wire slides into the flared channel through the V-shaped guide channel and then slides down and is clamped in the clamping channel. The flared channel is wider than the clamping channel. The flared channel reduces the force required to press the conductor in, facilitating its entry into the clamping channel. The notch is wider than both the clamping channel and the flared channel, providing clamping force to the clamping channel, which clamps the conductor by deforming. The first and second inclined portions reduce the opening of the clamping channel when the conductor retracts, thereby increasing the clamping force and preventing the conductor from detaching from the clamping channel.

[0048] Furthermore, the conductor clamping cylinder 52 is also provided with a limiting protrusion 59, which is used to limit the cable clamped at the cable clamping end. Specifically, it is used to block the insulation sheath at the stripped part of the cable, restrict the cable from moving in the opposite direction to the clamping channel, maintain the length of the exposed conductor, and prevent the conductor from generating outward pushing force at the clamping channel, thus preventing the conductor from coming off.

[0049] Furthermore, the cable clamping end includes a cable clamping base 55 and an annular clamping portion 56 connected to the cable clamping base. The cable clamping base 55 is provided with an annular protrusion having a notch 58. The width w1 of the annular protrusion and the width w2 of the internal thread groove of the locking nut can satisfy the following relationship: w1=w2-w0, where w0 can be preset, preferably 0.1mm≤w0≤0.2mm. The notch 58 is used for the thread of the locking nut to be screwed into the annular protrusion. In this way, when disassembling the circular connector structure, the locking nut can be removed first. When the internal thread of the locking nut disengages from the external thread on the sensor, the locking nut can be pulled directly, pulling out the clamping structure without other auxiliary tools, making it convenient for operators to disassemble the connector.

[0050] Furthermore, the annular clamping part 56 includes a plurality of strip-shaped clamping members spaced apart in the circumferential direction and extending in the axial direction, i.e., the annular clamping part is formed as a claw structure. During the assembly of the cable locking nut, the inclined inner wall of the locking nut presses against the plurality of clamping members, and the pressure-bearing ends of the plurality of clamping members tighten inward, pressing against the outer wall of the cable sealing ring, causing the cable sealing ring to deform. The deformed inner wall of the cable sealing ring presses against the cable, achieving a dustproof and waterproof seal.

[0051] Furthermore, a limiting groove 18 is provided in the wire clamping end for inserting the wire piercing part and limiting the wire piercing part.

[0052] When the clamping structure is installed into the wiring cavity, the guide protrusion and guide groove are aligned, allowing the piercing terminal to be smoothly inserted into the limiting groove on the clamping structure. After the clamping structure is installed into the wiring cavity, the guide protrusion and guide groove act as a limit, preventing the clamping structure from rotating and providing a stable and uniform piercing pressure when the piercing terminal pierces the insulation layer of the wire.

[0053] Furthermore, in this embodiment of the invention, during the connection process between the locking nut and the housing, the wire is guided and embedded into the clamping groove through the V-shaped guide opening. Specifically, during the tightening of the locking nut, the wire piercing part is inserted into the limiting groove of the clamping structure, and the wire is cut by the wire piercing part through the V-shaped guide opening. The wire insulation is cut open, and the conductor core of the wire is guided by the V-shaped guide opening and embedded into the clamping groove, thus establishing electrical connection with the circuit board. Since the wire is fixed to the clamping structure, connecting the wire during the tightening of the locking nut reduces the professional skill requirements for operators, improves wiring quality, and enhances wiring stability. In addition, the clamping groove provides a continuous clamping force to the conductor core, while the limiting groove provides a holding force to the wire piercing part, ensuring that the clamping groove always clamps the conductor core. Even under the influence of impact and vibration, there is still a strong clamping force, thus maintaining conductor continuity and increasing the sensor's vibration and impact resistance.

[0054] Furthermore, such as Figure 8 As shown, the cable locking nut is provided with multiple inserts 17, which are used to fit into the gap between two adjacent clamping members. The inserts can be tapered protrusions. When the locking nut is tightened by internal thread rotation, the inserts will fit into the gap between the two adjacent clamping members, making it difficult for the locking nut to rotate back after tightening, thereby preventing the locking nut from loosening.

[0055] Furthermore, the outer periphery of the locking nut has a textured anti-slip structure and an external hexagonal structure located on the right side of the textured anti-slip structure. The external hexagonal structure is used to facilitate manual tightening or tightening of the connecting nut with a wrench by the operator. The sensor body can be circular or square.

[0056] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this utility model can be achieved, and no limitation is imposed herein.

[0057] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A quick-connect sensor structure, characterized in that, The structure includes: a sensor body, a shaped cable clamping structure, and a cable locking nut. One end of the shaped cable clamping structure is inserted into the wiring cavity of the sensor body, and the other end is inserted into the cable locking nut. The outer wall of the sensor body is threadedly connected to the cable locking nut. The sensor body contains a circuit assembly and a piercing terminal connected to the circuit assembly. The wiring cavity of the sensor body contains an axially extending guide protrusion. The outer wall of the shaped cable clamping structure has a guide groove adapted to the guide protrusion. The guide protrusion and the guide groove cooperate to restrict the rotation of the shaped cable clamping structure. The exposed wire of the client cable passes through the shaped cable clamping structure and is clamped and fixed on the shaped cable clamping structure. During the locking process of the cable locking nut and the sensor body, the piercing terminal pierces the insulation of the wire and is electrically connected to the wire core.

2. The quick-connect sensor structure according to claim 1, characterized in that, The piercing terminal includes a terminal holder, a terminal connection part, and a wire piercing part, wherein one end of the terminal connection part is connected to the terminal holder and the other end is connected to the circuit board, and the wire piercing part is connected to the terminal holder.

3. The quick-connect sensor structure according to claim 2, characterized in that, The edge of the terminal connection part is provided with a barbed protrusion, and the corresponding position of the terminal holder is provided with an adapter slot. During assembly, the protrusion is embedded into the slot through elastic deformation.

4. The quick-connect sensor structure according to claim 2, characterized in that, The terminal connection part is an extension of the copper foil of the circuit board. The edge of the terminal connection part is provided with a positioning groove that matches the edge contour of the circuit board. The positioning groove is interference-fitted with the positioning boss preset on the circuit board to achieve a fixed connection between the piercing terminal and the circuit board without offset.

5. The quick-connect sensor structure according to claim 2, characterized in that, The conductor piercing part is provided with a V-shaped guide opening, a wire clamping groove and a transition groove connected in sequence. The inner wall of the wire clamping groove is provided with symmetrically distributed elastic arc-shaped protrusions, and the connection between the wire clamping groove and the transition groove is provided with a barb structure. During the locking process, after the conductor is guided by the V-shaped guide opening to pierce the insulation layer, it is embedded in the wire clamping groove and is double-clamped and fixed by the elastic arc-shaped protrusions and the barb structure, so as to achieve a stable electrical connection with the conductor piercing part.

6. The quick-connect sensor structure according to claim 5, characterized in that, The height of the protrusion h = 0.1d ~ 0.2d, where d is the diameter of the conductor core.

7. The quick-connect sensor structure according to claim 1, characterized in that, The connection between the outer wall of the sensor body and the cable locking nut is provided with an anti-loosening structure. The anti-loosening structure includes: n metal elastic ribs evenly distributed circumferentially in the non-threaded area of ​​the inner wall of the cable locking nut, and n annular micro-grooves provided at corresponding positions on the outer wall of the sensor body; the free state height of the metal elastic ribs is greater than the groove depth, and after assembly, the metal elastic ribs elastically embed into the annular micro-grooves to form radial clamping.

8. The quick-connect sensor structure according to claim 7, characterized in that, n satisfies n≥f / 10, where f is the vibration frequency of the environment in which the sensor is used.

9. The quick-connect sensor structure according to claim 1, characterized in that, The irregular cable clamping structure includes a hollow wire clamping end and a cable clamping end. The wire clamping end is inserted into the wiring cavity, and the cable clamping end is inserted into the cable locking nut. A cable sealing ring is provided in the cable clamping end. The cable passes through the cable sealing ring and is clamped and fixed in the cable sealing ring. The wire clamping is fixed on the wire clamping end.

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