A synchronous linkage carbon film linear displacement sensor with waterproof performance

Abstract

The name of the present invention is a synchronous linkage carbon film linear displacement sensor with waterproof performance. It belongs to the technical field of carbon film linear displacement sensors. It mainly solves the problem that the existing carbon film linear displacement sensor is not suitable for special and harsh environments because it does not have a waterproof protection level. Its main features are that it includes a shell, a back cover, a front cover, a circuit board assembly, an output line assembly, a strong magnet slider A assembly and a strong magnet slider B assembly; the strong magnet slider B assembly is installed in the shell; the strong magnet slider A assembly is installed outside the shell through a sliding connection mechanism; sealing plugs are provided between the two ends of the shell and the back cover and the front cover. The present invention has the characteristics of simple structure, stable and reliable comprehensive performance, high cost performance and easy large-scale production. It is suitable for various types of liquid interiors, deep underwater and oily, dusty and dirty environments, filling the gap in the industry.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon film linear displacement sensors, and in particular relates to a synchronous linkage carbon film linear displacement sensor with waterproof performance. Background Art

[0002] Since the advent of the self-linear carbon film linear displacement sensor, due to the unique structure of the product, the pull rod needs to pass through the back cover to connect with the sliding core in the housing. During operation, the pull rod moves back and forth relative to the back cover or housing, resulting in poor sealing performance. It is only suitable for use in relatively mild environments. By integrating with industrial control systems, it can directly display various data monitoring of mechanical linear motion and issue operating instructions. However, in actual applications, there are many special and harsh environments that are not suitable for relatively mild environments, such as chemical liquids, deep in rivers and oceans, and in environments with flammable and explosive materials, oil pollution, wind and dust, etc., where the protection level of existing self-linear carbon film linear displacement sensors cannot be effectively guaranteed. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned deficiencies and provide a synchronous linkage carbon film linear displacement sensor with a simple structure, stable and reliable comprehensive performance and waterproof performance.

[0004] The technical solution of the present invention is: a synchronous linkage carbon film linear displacement sensor with waterproof performance, including a housing, a circuit board assembly, an output line assembly, and a back cover and a front cover installed at both ends of the housing, characterized in that: it also includes a strong magnet slider A assembly and a strong magnet slider B assembly; the strong magnet slider B assembly is installed in the housing; the strong magnet slider A assembly is installed outside the housing through a sliding connection mechanism; and sealing plugs are provided between the two ends of the housing and the back cover and the front cover.

[0005] The sliding connection mechanism described in the technical solution of the present invention includes sliding grooves arranged on the upper parts of both sides of the shell and sliders arranged on both sides of the lower part of the strong magnet slider A component.

[0006] The powerful magnet slider A assembly described in the technical solution of the present invention includes a guide block, a wear-resistant plastic mounting seat B installed in the guide block, and a powerful magnet B installed in the wear-resistant plastic mounting seat B. A matching sliding connection mechanism is provided between the guide block and the housing. The powerful magnet A consists of six magnet blocks, which are composed of powerful permanent magnet blocks with the same magnetic poles at both ends and opposite magnetic poles in the middle or alternately distributed; the powerful magnet slider B assembly includes a powerful magnet A installed in the wear-resistant plastic mounting seat A, a sliding core bracket and a sliding core sleeve. The wear-resistant plastic mounting seat B is installed on the sliding core bracket, and the sliding core bracket is installed in the corresponding sliding groove in the housing through the sliding core sleeves on both sides; the powerful magnet B consists of four magnet blocks, which are composed of powerful permanent magnet blocks with the same magnetic poles at both ends and opposite magnetic poles in the middle; except for the S-pole magnet blocks at both ends of the powerful magnet A, the middle powerful permanent magnet block has the same number of powerful permanent magnet blocks as the powerful magnet B, and the magnetic pole directions are opposite; the circuit board assembly includes a carbon film plate installed in the housing, a conductive elastic clip and a brush installed on the sliding core bracket.

[0007] The powerful magnet A described in the technical solution of the present invention is composed of six rectangular powerful permanent magnet blocks combined in sequence, and the powerful magnet B is composed of four rectangular powerful permanent magnet blocks combined in sequence, and the magnetic pole faces of the powerful permanent magnet blocks are located on the same plane.

[0008] The six rectangular strong permanent magnet blocks of the strong magnet A described in the technical solution of the present invention are installed in the wear-resistant plastic mounting seat A in the direction of SNSSNS and are fixed by epoxy resin potting; the four rectangular strong permanent magnet blocks of the strong magnet B are installed in the wear-resistant plastic mounting seat B in the direction of SNNS and are fixed by epoxy resin potting.

[0009] The guide block described in the technical solution of the present invention is provided with a connecting mechanism.

[0010] The connecting mechanism described in the technical solution of the present invention includes a connecting seat arranged on the guide block, a curved rod ball head installed on the connecting seat, a small pull rod connected to the curved rod ball head, and an inner tooth fish eye connected to the small pull rod.

[0011] The sealing plug described in the technical solution of the present invention includes a front plastic sealing upper plug and a front plastic sealing lower plug, a front sealing gasket at the front end of the shell, and a rear plastic sealing plug and a rear sealing gasket at the rear end of the shell.

[0012] The output line assembly described in the technical solution of the present invention includes a waterproof connector and a shielded wire. The waterproof connector is installed on the waterproof connector installation hole of the rear cover, and the shielded wire is installed in the waterproof connector.

[0013] The shell described in the technical solution of the present invention is an aluminum tube shell or other non-magnetic metal shell.

[0014] The present invention adopts a waterproof synchronous linkage carbon film linear displacement sensor composed of a housing, a rear cover, a front cover, a circuit board assembly, an output line assembly, a strong magnet slider A assembly and a strong magnet slider B assembly, wherein the strong magnet slider B assembly is installed in the housing, and the strong magnet slider A assembly is installed outside the housing through a sliding connection mechanism. Sealing plugs are provided between both ends of the housing and the rear cover and the front cover. Therefore, the strong magnet slider A assembly outside the housing can drag the strong magnet slider B assembly inside the housing to move in a linked and synchronous linear manner, driving the brushes in the circuit board assembly to slide back and forth freely and smoothly on the carbon film plate. After the sealing plug ensures the high sealing of the housing, the function of the linear displacement sensor is realized, and the carbon film linear displacement sensor reaches a protection level with waterproof performance.

[0015] The invention has the characteristics of simple structure, stable and reliable comprehensive performance, high cost performance and easy large-scale production. The invention is suitable for use in various liquids, deep underwater and in oily, dusty and polluted environments, filling a gap in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded schematic diagram of the present invention.

[0017] In the figure: 1-waterproof connector; 2-shielded wire; 3-rear locking screw; 4-rear cover; 5-rear sealing gasket; 6-strong magnet B; 7-wear-resistant plastic mounting seat B; 8-inner fisheye; 9-sliding core bracket; 10-strong magnet A; 11-small pull rod; 12-bent rod ball head; 13-guide block; 14-nut; 15-wear-resistant plastic mounting seat A; 16-front plastic sealing upper plug; 17-front locking screw; 18-front cover; 19-front sealing gasket; 20-front plastic sealing lower plug; 21-housing; 22-carbon film plate; 23-sliding core sheath; 24-brush; 25-conductive elastic clip; 26-rear plastic sealing plug; 27-wire outlet hole; 28-waterproof connector mounting hole. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solution of the present invention, the embodiments of the present invention will be described in further detail below.

[0019] like Figure 1 As shown, an embodiment of the present invention is a synchronous linkage carbon film linear displacement sensor with waterproof performance, including a housing 21, a sealing plug, a back cover 4, a front cover 18, a circuit board assembly, an output line assembly, a strong magnet slider A assembly and a strong magnet slider B assembly.

[0020] Housing 21 is an aluminum tube, but can also be made of other non-magnetic metals. Except for the upper grooves on both sides, housing 21 is identical to the housings of existing carbon film linear displacement sensors. A mounting groove for the carbon film plate 22 is located in the lower portion of the inner cavity of housing 21, and a groove for the sliding core sheath 23 is located in the middle.

[0021] The powerful magnet slider assembly A includes a guide block 13, a wear-resistant plastic mounting seat B7, and a powerful magnet B6. The powerful magnet B6 is mounted within the wear-resistant plastic mounting seat B7, which is in turn mounted within the guide block 13. Guide block 13 is flanked by matching sliders, which form a sliding connection with the upper slide grooves on both sides of the housing 21. The powerful magnet A10 consists of six magnet blocks, each with identical poles at both ends and opposite or alternating poles in the middle. The powerful magnet slider assembly A is mounted to the exterior of the housing 21 via a sliding connection.

[0022] The powerful magnet A10 is composed of six rectangular strong permanent magnets, arranged in sequence, with their pole faces aligned in the same plane. The six rectangular strong permanent magnets are arranged in the order S1N2S3S4N5S6, pressed into a wear-resistant plastic mounting base A15, and then sealed with epoxy resin and secured within the guide block 13.

[0023] The guide block 13 is provided with a connecting mechanism. This mechanism includes a connecting seat mounted on the guide block 13, a curved rod ball 12 mounted on the connecting seat, a small tie rod 11 connected to the curved rod ball 12, and an inner fish eye 8 connected to the small tie rod 11. The inner fish eye 8, small tie rod 11, and curved rod ball 12 are assembled via threaded connections. The connecting seat is a cylindrical seat with a through hole. The curved rod ball 12 passes through the connecting seat and penetrates into the guide block 13, where it is secured by a nut 14.

[0024] The powerful magnet slider B assembly is installed in the housing 21. The powerful magnet slider B assembly includes a powerful magnet A10, a wear-resistant plastic mounting seat A15, a sliding core bracket 9, four sliding core sleeves 23, and a brush 24. The powerful magnet A10 is installed in the wear-resistant plastic mounting seat A15, and the wear-resistant plastic mounting seat B7 is installed on the sliding core bracket 9. The powerful magnet B6 is composed of four rectangular powerful permanent magnet blocks, which are assembled in sequence. The magnetic pole faces of the powerful permanent magnet blocks are located on the same plane. The powerful permanent magnet blocks at both ends have the same magnetic poles and are opposite to the magnetic poles in the middle. Except for the S-pole magnet blocks at the two ends of the powerful magnet A10, the powerful permanent magnet block in the middle has the same number of powerful permanent magnet blocks as the powerful magnet B6, but with opposite magnetic pole directions. First, hot-melt the brush 24 onto the sliding core bracket 9 with glue nails, then insert the four sliding core sleeves 23 into the corresponding positions of the sliding core bracket 9 respectively, and then arrange the strong magnet group B6 in the order of S1N2S3N4, press it into the wear-resistant plastic mounting seat B7, and seal it into the assembled sliding core bracket 9 with glue.

[0025] The circuit board assembly includes a carbon film board 22, a conductive elastic clip 25, and a shielding wire 2. The carbon film board 22 is installed in the mounting groove of the housing 21, and the conductive elastic clip 25 is fixed to the carbon film board 22. The carbon film board 28 is installed inside the aluminum tube 21 and fixed under the rubber strip lining, with one end fixed with glue.

[0026] The sealing plug includes a front upper plastic sealing plug 16 and a front lower plastic sealing plug 20 at the front end of the housing 21, and a front sealing gasket 19. The front cover 18 is then fixed to the front end of the housing 21 using front locking screws 17. At the rear end of the housing 21, the rear plastic sealing plug 26 and the rear sealing gasket 5 are fixed to the rear end of the housing 21 using rear locking screws 3.

[0027] The output cable assembly includes a waterproof connector 1, a shielded cable 2, and a conductive elastic clip 25. The waterproof connector 1 is installed in the waterproof connector mounting hole 28 in the center of the rear cover 4. The three-core shielded cable 2 is installed in the waterproof connector 1 and soldered to the conductive elastic clip 25 as required. A cable outlet hole 27 is provided on the rear sealing gasket 5.

[0028] The present invention utilizes an external magnet to drag the magnet inside the fully sealed aluminum profile to achieve absolute synchronous movement. The internal magnet is installed in the center hole of the sliding bracket. The brush installed on the sliding bracket and the linear carbon film circuit board inside the fully sealed aluminum profile form a synchronous linkage carbon film linear displacement sensor with high sealing performance.

[0029] The steps for assembling the finished product of the present invention are as follows:

[0030] 1. Install the strong magnet slider B assembly into the housing 21 and circuit board assembly using a lining (to protect the brushes from damage);

[0031] 2. Install the corresponding slot of the output line assembly directly into the conductive silver film end of the line board;

[0032] 3. Pass the shielded wire 2 through the outlet hole 27. Use a clamp to push the front plastic sealing upper plug 16 and the front plastic sealing lower plug 20, as well as the rear plastic sealing plug 26 at both ends of the housing 21 into the housing 21 and seal them all with glue.

[0033] 4. Install the front gasket 19 and the front cover 18 into the housing 21 in sequence and secure them with the front locking screws 17;

[0034] 5. Pass the rear sealing gasket 5 and the rear cover 4 through the shielded wire 2 in sequence, and secure them with the rear locking screws 3;

[0035] 6. Pass the shielded wire 2 through the waterproof connector 1 and fasten it to the rear cover 4 with the threaded connection.

[0036] 7. Insert the strong magnet slider A assembly into the corresponding position of the housing 21 through the slot to complete the finished product assembly.

Claims

1. A synchronous linkage carbon film linear displacement sensor with waterproof performance, comprising a housing (21), a circuit board assembly, an output line assembly, and a rear cover (4) and a front cover (18) mounted at both ends of the housing (21), characterized in that: It also includes a strong magnet slider A component and a strong magnet slider B component; the strong magnet slider B component is installed in the shell (21); the strong magnet slider B component includes a wear-resistant plastic mounting seat B (7) and a strong magnet B (6) installed in the wear-resistant plastic mounting seat B (7), a sliding core bracket (9) and a sliding core sleeve (23), the wear-resistant plastic mounting seat B (7) is installed on the sliding core bracket (9), and the sliding core bracket (9) is installed in the corresponding sliding groove in the shell (21) through the sliding core sleeves (23) on both sides; the strong magnet B (6) is composed of four magnet blocks, which are strong permanent magnet blocks with the same magnetic poles at both ends and opposite magnetic poles in the middle; the strong magnet slider A component is installed outside the shell (21) through a sliding connection mechanism; the strong magnet slider A component includes a guide block (13), a wear-resistant plastic mounting seat A (15) installed in the guide block (13) and a guide block (15) installed in the wear-resistant plastic mounting seat A strong magnet A (10) in A (15) is provided with a matching sliding connection mechanism between the guide block (13) and the housing (21). The strong magnet A (10) is composed of six magnet blocks, and the strong permanent magnet blocks with the same magnetic poles at both ends and opposite magnetic poles in the middle or alternately distributed; except for the S-pole magnet blocks at both ends of the strong magnet A (10), the middle strong permanent magnet block is the same in number as the strong permanent magnet blocks in the strong magnet B (6), and the magnetic pole directions are opposite; the circuit board assembly includes a carbon film plate (22) installed in the housing (21), a conductive elastic clip (25) and a brush (24) installed on the sliding core bracket (9); the sliding connection mechanism includes a slide groove provided on the upper part of both sides of the housing (21) and a slider provided on both sides of the lower part of the strong magnet slider A assembly; sealing plugs are provided between both ends of the housing (21) and the rear cover (4) and the front cover (18).

2. The waterproof synchronous linkage carbon film linear displacement sensor according to claim 1, characterized in that: The strong magnet A (10) is composed of six rectangular strong permanent magnet blocks assembled in sequence, and the strong magnet B (6) is composed of four rectangular strong permanent magnet blocks assembled in sequence, and the magnetic pole faces of the strong permanent magnet blocks are located on the same plane.

3. The waterproof synchronous linkage carbon film linear displacement sensor according to claim 2, characterized in that: The six rectangular strong permanent magnet blocks of the strong magnet A (10) are mounted in the wear-resistant plastic mounting seat A (15) in the direction of SNSSNS and are fixed by epoxy resin potting; the four rectangular strong permanent magnet blocks of the strong magnet B (6) are mounted in the wear-resistant plastic mounting seat B (7) in the direction of SNNS and are fixed by epoxy resin potting.

4. A synchronous linkage carbon film linear displacement sensor with waterproof performance according to any one of claims 1 to 3, characterized in that: The guide block (13) is provided with a connecting mechanism.

5. The waterproof synchronous linkage carbon film linear displacement sensor according to claim 4, characterized in that: The connecting mechanism comprises a connecting seat arranged on a guide block (13), a curved rod ball head (12) installed on the connecting seat, a small pull rod (11) connected to the curved rod ball head (12), and an inner tooth fish eye (8) connected to the small pull rod (11).

6. A waterproof synchronous linkage carbon film linear displacement sensor according to any one of claims 1 to 3 and 5, characterized in that: The sealing plug comprises a front plastic sealing upper plug (16) and a front plastic sealing lower plug (20), a front sealing gasket (19) at the front end of the housing (21), and a rear plastic sealing plug (26) and a rear sealing gasket (5) at the rear end of the housing (21).

7. A waterproof synchronous linkage carbon film linear displacement sensor according to any one of claims 1 to 3 and 5, characterized in that: The output line assembly comprises a waterproof connector (1) and a shielded wire (2), wherein the waterproof connector (1) is mounted on the waterproof connector mounting hole (28) of the rear cover (4), and the shielded wire (2) is mounted in the waterproof connector (1).

8. A waterproof synchronous linkage carbon film linear displacement sensor according to any one of claims 1 to 3 and 5, characterized in that: The housing (21) is an aluminum tube housing or other non-magnetic metal housing.

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