A linear displacement sensor with position limiting function

Abstract

This utility model belongs to the field of linear displacement sensor technology and discloses a limitable linear displacement sensor, including a shell base. A circuit assembly for realizing the sensor function is disposed within the shell base. A high-precision slide rail and a high-precision slider are disposed on the shell base. An adjustable resistive conductive element is disposed within the high-precision slide rail to cooperate with the high-precision slider to realize linear distance detection. Two sets of adjustable limit elements are also disposed on the high-precision slide rail. The high-precision slider includes a main groove slider, two sets of male protrusions, a brush, and an exposed mating block. The adjustable resistive conductive element includes a plastic flat mold and a strip-shaped conductive material coating. The adjustable limit elements include a limit cap and two sets of fixing feet. This utility model has a compact and reasonable structural design, enabling the slider to connect to the component to be detected and detect its linear motion state. The device has very low friction and allows arbitrary adjustment of the upper and lower limits of the slider's movement, meeting some special application requirements. The device is easy to use and has very high detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of linear displacement sensor technology, specifically a limitable linear displacement sensor. Background Technology

[0002] In modern industrial automation, precision machinery manufacturing, scientific research, and high-end equipment, linear displacement sensors serve as key detection components, undertaking the crucial task of accurately measuring the linear displacement of objects. Their performance directly impacts the operational accuracy and system stability of equipment. However, currently widely used linear displacement sensors still face numerous technical challenges that urgently need to be addressed in practical applications.

[0003] On the one hand, traditional linear displacement sensors generally suffer from high friction. These sensors often employ sliding friction transmission, where the internal slider and guide rail are in direct contact during detection. Due to factors such as surface roughness and material properties, significant frictional resistance is generated. This friction not only hinders the movement of the component being measured connected to the sensor, affecting its normal operation, but also leads to deviations in the detection results, significantly reducing detection accuracy. For example, in semiconductor chip manufacturing, chip packaging equipment requires precise control of the linear displacement of the robotic arm to achieve accurate chip installation. However, the high friction of traditional linear displacement sensors causes lag and vibration in the robotic arm's movement, resulting in errors in chip installation position and consequently affecting product yield.

[0004] On the other hand, with the continuous development of industrial technology, more and more special application scenarios are placing new demands on linear displacement sensors. In some equipment involving single-axis fixed-distance moving components, such as material pushing devices on automated production lines and tool feeding systems of high-precision CNC machine tools, the movement distance of these components is fixed, requiring sensors to accurately adapt to their movement distance in order to achieve accurate displacement detection and control. However, existing linear displacement sensors often have fixed detection ranges, making it difficult to flexibly adjust the detection distance according to actual needs, and thus failing to perfectly match the movement distance of these components. When processing or inspecting products of different specifications, frequent sensor replacements not only increase equipment costs but also reduce production efficiency, causing great inconvenience to actual production. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a limitable linear displacement sensor, which solves the problems mentioned in the background art, such as the impact of friction on detection accuracy and the difficulty in adapting the sensor to certain special requirements.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a limitable linear displacement sensor, comprising a shell base, a circuit component for realizing the sensor function is provided inside the shell base, a high-precision slide rail and a high-precision slider are provided on the shell base, an adjustable resistive conductive element is provided inside the high-precision slide rail to cooperate with the high-precision slider to realize linear distance detection, and two sets of adjustable limit elements are also provided on the high-precision slide rail.

[0009] Preferably, the high-precision slide rail includes a mountain-shaped base, a main groove is formed on the convex part of the mountain-shaped base, and recessed grooves are formed on both sides of the main groove. A resistor element fixing groove is formed below the main groove, and a brush window is formed on the resistor element fixing groove. The resistor element fixing groove is connected to the main groove through the brush window. High-precision low-friction structures are provided at both sets of recessed grooves.

[0010] Preferably, the high-precision slider includes a main groove slider, two sets of male protrusions, a brush, and an exposed mating block. The main groove slider is slidably engaged in the main groove. Male protrusions corresponding to female grooves are provided on both sides of the main groove slider. The male protrusions are slidably engaged in the female grooves. A brush is provided at the bottom of the main groove slider. The brush extends through the brush window and is placed at the top of the resistor element fixing groove. An exposed mating block is provided on the side of the main groove slider away from the brush. The exposed mating block is fixedly connected to the component to be tested.

[0011] Preferably, the high-precision low-friction structure includes ball grooves, balls, and ball mating grooves. Ball grooves are provided on both the upper and lower sides of the female groove, and multiple sets of balls are arranged in the ball grooves. Ball mating grooves corresponding to the multiple sets of balls are provided on both the upper and lower sides of the male protrusion.

[0012] Preferably, the adjustable resistive conductive component includes a plastic flat mold and a strip-shaped conductive material coating. The plastic flat mold is fixedly installed in the resistive element fixing groove. The side of the plastic flat mold near the brush window is coated with a strip-shaped conductive material coating. The brush contacts and is electrically connected to the strip-shaped conductive material coating. A first electrical contact block is provided at the opening on one side of the high-precision slide rail. The adjustable resistive conductive component is electrically connected to the circuit assembly inside the shell substrate through the first electrical contact block. A second electrical contact structure is provided on one side of the recess.

[0013] Preferably, the second electrical connection structure includes an electrical connection component groove, a composite graphene conductive strip, and an electrical connection slider. An electrical connection component groove is provided on the side of a set of negative grooves away from the center. A composite graphene conductive strip is fixedly installed in the electrical connection component groove. An electrical connection slider corresponding to the composite graphene conductive strip is provided on the positive protrusion. The electrical connection slider is electrically connected to the composite graphene conductive strip. The high-precision slider is electrically connected to the internal circuit assembly of the shell substrate through the second electrical connection structure. The high-precision slider, the adjustable resistance conductive element, the first electrical connection block, and the second electrical connection structure together with the internal circuit assembly of the shell substrate form a closed loop.

[0014] Preferably, the adjustable limiting component includes a limiting cap and two sets of fixing feet. The limiting cap is slidably engaged with the outer side of the high-precision slide rail. Both ends of the limiting cap are provided with fixing feet. The fixing feet are provided with first fixing holes. The high-precision slide rail is provided with multiple sets of equidistant second fixing holes. The adjustable limiting component is fixedly installed on the high-precision slide rail by bolts.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a limitable linear displacement sensor, which has the following advantages:

[0017] 1. This limitable linear displacement sensor is equipped with a high-precision slide rail, a high-precision slider, an adjustable limit component, and an adjustable resistive conductive component. It can connect the slider to the component to be detected and detect its linear motion state. The device has very low friction and can arbitrarily adjust the upper and lower limits of the slider's movement, which can meet some special application requirements. The device is easy to use and has very high detection accuracy.

[0018] 2. It is equipped with high-precision slide rails and sliders, and uses ball bearings as the contact medium, which can greatly reduce the contact area, significantly reduce frictional resistance, and greatly improve its detection accuracy.

[0019] 3. It is equipped with adjustable limiters, the position of which can be adjusted to change the actual length of the slide, and limit the upper and lower limits of the slider's movement. It is easy to use and suitable for linear detection of single-axis fixed-distance linear motion. It has various usage methods and can meet some special application requirements. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the high-precision slide rail structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the high-precision slider structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the high-precision slide rail and high-precision slider structure of this utility model.

[0024] In the diagram: 1. Shell base; 2. High-precision slide rail; 3. High-precision slider; 4. Adjustable limiting component; 5. Adjustable resistive conductive component; 6. Mountain-shaped base; 7. Main groove; 8. Female groove; 9. Resistor element fixing groove; 10. Brush window; 11. High-precision low-friction structure; 12. Main groove slider; 13. Male protrusion; 14. Brush; 15. Exposed mating block; 16. Ball groove; 17. Ball; 18. Ball mating groove; 19. Plastic flat mold; 20. Strip-shaped conductive material coating; 21. First electrical contact block; 22. Second electrical contact structure; 23. Electrical contact component groove; 24. Composite graphene conductive strip; 25. Electrical contact slider; 26. Limiting cap; 27. Fixing foot; 28. First fixing hole; 29. ​​Second fixing hole. Detailed Implementation

[0025] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution:

[0027] A limitable linear displacement sensor includes a housing 1, a circuit assembly for realizing the sensor function is provided inside the housing 1, a high-precision slide rail 2 and a high-precision slider 3 are provided on the housing 1, an adjustable resistive conductive element 5 is provided inside the high-precision slide rail 2 to cooperate with the high-precision slider 3 to realize linear distance detection, and two sets of adjustable limit elements 4 are also provided on the high-precision slide rail 2.

[0028] Furthermore, the high-precision slide rail 2 includes a mountain-shaped base 6, a main groove 7 is provided on the convex part of the mountain-shaped base 6, and grooves 8 are provided on both sides of the main groove 7. A resistor element fixing groove 9 is provided below the main groove 7, and a brush window 10 is provided on the resistor element fixing groove 9. The resistor element fixing groove 9 is connected to the main groove 7 through the brush window 10. High-precision low-friction structures 11 are provided at both sets of grooves 8.

[0029] Furthermore, the high-precision slider 3 includes a main groove slider 12, two sets of male protrusions 13, a brush 14, and an exposed mating block 15. The main groove slider 12 is slidably engaged in the main groove 7. Male protrusions 13 corresponding to female grooves 8 are provided on both sides of the main groove slider 12. The male protrusions 13 are slidably engaged in the female grooves 8. A brush 14 is provided at the bottom of the main groove slider 12. The brush 14 extends through the brush window 10 and is placed at the top of the resistor element fixing groove 9. An exposed mating block 15 is provided on the side of the main groove slider 12 away from the brush 14. The exposed mating block 15 is fixedly connected to the component to be tested.

[0030] Furthermore, the high-precision low-friction structure 11 includes ball grooves 16, balls 17, and ball mating grooves 18. Ball grooves 16 are provided on both the upper and lower sides of the female groove 8, and multiple sets of balls 17 are provided in the ball grooves 16. Ball mating grooves 18 corresponding to multiple sets of balls 17 are provided on both the upper and lower sides of the male protrusion 13.

[0031] Furthermore, the adjustable resistive conductive component 5 includes a plastic flat mold 19 and a strip-shaped conductive material coating 20. The plastic flat mold 19 is fixedly installed in the resistive element fixing groove 9. The side of the plastic flat mold 19 adjacent to the brush window 10 is coated with a strip-shaped conductive material coating 20. The brush 14 contacts and is electrically connected to the strip-shaped conductive material coating 20. A first electrical contact block 21 is provided at the opening on one side of the high-precision slide rail 2. The adjustable resistive conductive component 5 is electrically connected to the circuit assembly inside the shell substrate 1 through the first electrical contact block 21. A second electrical contact structure 22 is provided on one side of the groove 8.

[0032] Furthermore, the second electrical connection structure 22 includes an electrical connection component groove 23, a composite graphene conductive strip 24, and an electrical connection slider 25. An electrical connection component groove 23 is provided on the side of a set of negative grooves 8 away from the center. The composite graphene conductive strip 24 is fixedly installed within the electrical connection component groove 23. An electrical connection slider 25 corresponding to the composite graphene conductive strip 24 is provided on the positive protrusion 13. The electrical connection slider 25 is electrically connected to the composite graphene conductive strip 24. The high-precision slider 3 is electrically connected to the circuit components inside the shell substrate 1 through the second electrical connection structure 22. The high-precision slider 3, the adjustable resistance conductive component 5, the first electrical connection block 21, and the second electrical connection structure 22 together with the circuit components inside the shell substrate 1 form a closed loop. When the component to be tested, which is fixedly connected to the exposed mating block 15, undergoes linear displacement, it will cause the high-precision slider 3 to slide on the high-precision slide rail 2. As the slider slides, the position of the brush 14 on the strip-shaped conductive material coating 20 changes, thereby changing the resistance value between the brush 14 and the first electrical connection block 21. According to Ohm's law, in a closed loop, current is inversely proportional to resistance, and voltage is directly proportional to resistance. In this sensor, the high-precision slider 3, the adjustable resistive conductive element 5, the first electrical contact 21, and the second electrical contact structure 22, together with the circuit components inside the shell substrate 1, form a closed loop. When the resistance value changes, the current or voltage in the loop will also change accordingly. The circuit components inside the shell substrate 1 collect and process these electrical signals, converting the changes in electrical signals into corresponding linear displacement values ​​through a pre-set algorithm, ultimately achieving the measurement of the linear displacement of the component to be detected.

[0033] Furthermore, the adjustable limiting component 4 includes a limiting cap 26 and two sets of fixing feet 27. The limiting cap 26 is slidably engaged with the outer side of the high-precision slide rail 2. Both ends of the limiting cap 26 are provided with fixing feet 27, each with a first fixing hole 28. Multiple sets of equidistant second fixing holes 29 are provided on the high-precision slide rail 2. The adjustable limiting component 4 is fixedly mounted on the high-precision slide rail 2 with bolts. By adjusting the position of the adjustable limiting component 4 on the high-precision slide rail 2, the upper and lower limits of the slider's movement can be changed. This function allows the sensor to adapt to some special application requirements, such as single-axis fixed-distance moving components with a fixed movement distance. By adjusting the position of the adjustable limiting component 4, the sensor's detection distance can be perfectly matched to the component's movement distance, avoiding the hassle of frequent sensor replacements and improving production efficiency and equipment versatility.

[0034] Structural Description:

[0035] Shell base 1: The basic structure of the sensor, which contains the circuit components that realize the sensor function, provides a mounting carrier for other components, and ensures the overall operation of the sensor;

[0036] High-precision slide rail 2: It is equipped with a mountain-shaped base 6, main groove 7, and recessed groove 8, etc., which work together with high-precision slider 3 to realize linear displacement detection and provide a precise track for slider movement;

[0037] High-precision slider 3: includes main groove slider 12, male protrusion 13, etc., and cooperates with adjustable resistor conductive part 5 through brush 14 to convert the linear displacement of the component to be tested into an electrical signal. Its exposed mating block 15 is used to connect the component to be tested.

[0038] Adjustable limit component 4: It consists of a limit cap 26 and a fixed foot 27. It is connected to the second fixed hole 29 on the high-precision slide rail 2 by bolts. It can adjust the upper and lower limits of the slider movement to meet special use requirements.

[0039] Adjustable resistive conductive component 5: includes a plastic flat mold 19 and a strip-shaped conductive material coating 20, installed in the resistive element fixing groove 9, and achieves resistance value change through contact with the brush 14, thereby converting mechanical displacement into electrical signal;

[0040] Mountain-shaped base 6: The main structure of the high-precision slide rail 2. Its shape is mountain-shaped, which provides the basis for opening the grooves on the slide rail and determines the overall shape and basic structure of the slide rail.

[0041] Main groove 7: It is opened in the protrusion of the mountain-shaped base 6 to accommodate the main groove slider 12 of the high-precision slider 3, limit the movement direction of the slider and ensure its linear movement;

[0042] The inner groove 8 is located on both sides of the main groove 7 and cooperates with the male protrusion 13 of the high-precision slider 3 to further restrict the movement trajectory of the slider, while providing an installation position for the high-precision low-friction structure 11.

[0043] Resistor element fixing groove 9: It is opened below the main groove 7 and is used to fix and install the plastic flat mold 19 of the adjustable resistive conductive part 5 to ensure its stable position and enable the brush 14 to make accurate contact with it.

[0044] Brush window 10: It is opened on the resistor element fixing groove 9, connecting the main groove 7 and the resistor element fixing groove 9, so that the brush 14 can extend through and contact and electrically connect with the strip-shaped conductive material coating 20.

[0045] High-precision, low-friction structure 11: includes ball groove 16, ball 17 and ball mating groove 18, installed at the groove 8, using ball 17 as the contact medium to reduce the friction between the slider and the slide rail and improve the detection accuracy;

[0046] Main slot slider 12: The main part of the high-precision slider 3, it is slidably engaged in the main slot 7, driving the brush 14 and the exposed mating block 15 to move, realizing the displacement detection function;

[0047] Male protrusion 13: It is set on both sides of the main groove slider 12 and is slidably engaged with the female groove 8. It works with the main groove 7 and the female groove 8 to ensure the linear movement of the slider. At the same time, the male protrusion 13 is provided with components that connect with other structures.

[0048] Brush 14: Installed at the bottom of the main groove slider 12, passing through the brush window 10 and contacting the strip-shaped conductive material coating 20. It changes its position on the coating as the slider moves, thereby changing the resistance value and realizing electrical signal conversion.

[0049] Exposed mating block 15: Located on the side of the main groove slider 12 away from the brush 14, it is used to fix and connect with the part to be tested, so that the sensor can follow the movement of the part to perform displacement detection;

[0050] Ball groove 16: It is formed on the upper and lower sides of the groove 8 to accommodate the ball 17, provide installation space for the ball, ensure that the ball rolls in it, and achieve low friction function.

[0051] Ball 17: Placed in the ball groove 16, as a key component of the high-precision low-friction structure 11, it contacts the ball mating groove 18 on the male protrusion 13 to reduce the frictional resistance between the slider and the slide rail.

[0052] Ball groove 18: It is opened on the upper and lower sides of the male protrusion 13 and corresponds to the ball 17 to ensure that the ball can roll smoothly in it and assist the slider to slide with low friction on the slide rail.

[0053] Plastic flat mold 19: Installed in the resistor element fixing groove 9, it serves as a carrier for the strip-shaped conductive material coating 20 and provides a stable plane for the contact between the brush 14 and the strip-shaped conductive material coating 20;

[0054] Strip-shaped conductive material coating 20: Coated on the side of the plastic flat mold 19 near the brush window 10, in contact with and electrically connected to the brush 14, and the resistance value is changed by the change of the brush position to realize the displacement-electrical signal conversion;

[0055] First electrical contact 21: Located at the opening on one side of the high-precision slide rail 2, it is used to connect the adjustable resistive conductive part 5 to the circuit components inside the shell base 1 to ensure the transmission of electrical signals in the circuit.

[0056] The second electrical connection structure 22 includes an electrical connection component groove 23, a composite graphene conductive strip 24, and an electrical connection slider 25, providing another electrical connection path between the high-precision slider 3 and the circuit components inside the shell substrate 1, ensuring the stability and reliability of the circuit.

[0057] Electrical connection component groove 23: It is opened on the side of a set of grooves 8 away from the center, and is used to fix and install the composite graphene conductive strip 24, providing installation space for the electrical connection structure;

[0058] Composite graphene conductive strip 24: It is fixedly installed in the electrical connection component groove 23, has good conductivity, and is electrically connected to the electrical connection slider 25 to reduce resistance loss and improve sensor performance.

[0059] Electrical contact slider 25: It is set on the male protrusion 13, corresponds to and is electrically connected to the composite graphene conductive strip 24, realizes the electrical connection between the high-precision slider 3 and the second electrical contact structure 22, and ensures the transmission of electrical signals;

[0060] Limiting cap 26: It slides and is attached to the outside of the high-precision slide rail 2. It is the main part of the adjustable limiting component 4. It is connected to the slide rail through the fixed feet 27 at both ends and is used to limit the range of motion of the slider.

[0061] Fixed feet 27: Set at both ends of the limiting cap body 26, with first fixing holes 28, and fixed to the second fixing holes 29 on the high-precision slide rail 2 by bolts, so as to realize the installation and position adjustment of the adjustable limiting part 4;

[0062] First fixing hole 28: It is opened on the fixing foot 27 and cooperates with the bolt to fix the fixing foot 27 on the second fixing hole 29 of the high-precision slide rail 2, so as to realize the fastening installation of the adjustable limit piece 4;

[0063] The second fixing hole 29 is opened on the high-precision slide rail 2, corresponding to the first fixing hole 28. The adjustable limiter 4 is installed with bolts so that the position of the limiter can be adjusted to limit the upper and lower limits of the slider movement.

[0064] Working Principle: The core of this sensor lies in the linear sliding of the high-precision slider 3 along the high-precision slide rail 2, which changes the resistance value of the adjustable resistive conductive element 5, thereby converting mechanical displacement into an electrical signal. This signal is then processed and output through the circuit components within the housing 1. Simultaneously, the adjustable limiting element 4 can flexibly limit the slider's movement range to adapt to different application requirements. The high-precision slide rail 2 includes a mountain-shaped base 6, where the main groove 7 and the recessed groove 8 provide a precise track for the movement of the high-precision slider 3. The slider 12 of the high-precision slider 3 slides and engages within the main groove 7, while the two protrusions 13 on both sides correspondingly slide and engage within the recessed groove 8. This structure ensures that the slider can only move linearly along the slide rail, guaranteeing measurement accuracy. To reduce friction between the slider and the slide rail, ball grooves 16 are formed on the upper and lower sides of the recessed groove 8, containing multiple sets of balls 17. Corresponding ball mating grooves 18 are formed on the upper and lower sides of the protrusions 13. The balls 17, acting as a contact medium, significantly reduce the contact area between the slider and the slide rail, thereby greatly reducing frictional resistance. This low-friction design not only makes the slider movement smoother and reduces the impact on the movement of the measured part, but also improves the detection accuracy of the sensor, because the smaller friction force can reduce the error caused by friction. The adjustable resistive conductive element 5 is the key component for realizing displacement measurement. A plastic flat mold 19 is fixedly installed in the resistive element fixing groove 9, and its side near the brush window 10 is coated with a strip-shaped conductive material coating 20. A brush 14 is provided at the bottom of the high-precision slider 3. The brush 14 extends through the brush window 10 and contacts and is electrically connected to the strip-shaped conductive material coating 20. When the measured part, which is fixedly connected to the exposed mating block 15, undergoes linear displacement, it will drive the high-precision slider 3 to slide on the high-precision slide rail 2. As the slider slides, the position of the brush 14 on the strip-shaped conductive material coating 20 changes, thereby changing the resistance value between the brush 14 and the first electrical contact block 21. According to Ohm's law, in a closed circuit, the current is inversely proportional to the resistance, and the voltage is directly proportional to the resistance. In this sensor, the high-precision slider 3, the adjustable resistive conductive element 5, the first electrical contact block 21, and the second electrical contact structure 22 form a closed loop with the circuit components inside the shell substrate 1. When the resistance value changes, the current or voltage in the loop will also change accordingly. The circuit components inside the shell substrate 1 collect and process these electrical signals, converting the changes in electrical signals into corresponding linear displacement values ​​through a pre-set algorithm, ultimately realizing the measurement of the linear displacement of the component to be detected. The second electrical contact structure 22 includes an electrical contact component groove 23, a composite graphene conductive strip 24, and an electrical contact slider 25. The composite graphene conductive strip 24 is fixedly installed in the electrical contact component groove 23, and the electrical contact slider 25 on the male protrusion 13 is electrically connected to the composite graphene conductive strip 24. The second electrical contact structure 22 provides another electrical connection path between the high-precision slider 3 and the circuit components inside the shell substrate 1, ensuring the stability and reliability of the circuit.Meanwhile, the composite graphene conductive strip 24 has excellent conductivity, effectively reducing resistance loss and improving sensor performance. The adjustable limiting component 4 consists of a limiting cap 26 and two sets of fixing feet 27. The limiting cap 26 is slidably engaged with the outside of the high-precision slide rail 2, and the fixing feet 27 at both ends are fixed to the second fixing holes 29 on the high-precision slide rail 2 by bolts. By adjusting the position of the adjustable limiting component 4 on the high-precision slide rail 2, the upper and lower limits of the slider's movement can be changed. This function allows the sensor to adapt to some special application requirements, such as single-axis fixed-distance moving components with a fixed movement distance. By adjusting the position of the adjustable limiting component 4, the sensor's detection distance can be perfectly matched to the component's movement distance, avoiding the hassle of frequent sensor replacements and improving production efficiency and equipment versatility.

[0065] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A linear displacement sensor with limit switch, comprising a housing base (1) in which a circuit assembly for implementing the sensor function is arranged, characterized in that: The shell base (1) is provided with a high-precision slide rail (2) and a high-precision slider (3). The high-precision slide rail (2) is provided with an adjustable resistive conductive element (5) that cooperates with the high-precision slider (3) to realize linear distance detection. The high-precision slide rail (2) is also provided with two sets of adjustable limiting elements (4).

2. The linear displacement sensor of claim 1, wherein: The high-precision slide rail (2) includes a mountain-shaped base (6), a main groove (7) is provided at the convex part of the mountain-shaped base (6), and a recessed groove (8) is provided on both sides of the main groove (7). A resistor element fixing groove (9) is provided below the main groove (7), and a brush window (10) is provided on the resistor element fixing groove (9). The resistor element fixing groove (9) is connected to the main groove (7) through the brush window (10). A high-precision low-friction structure (11) is provided at both sets of recessed grooves (8).

3. The linear displacement sensor of claim 2, wherein: The high-precision slider (3) includes a main groove slider (12), two sets of male protrusions (13), a brush (14), and an exposed mating block (15). The main groove slider (12) is slidably engaged in the main groove (7). The two sides of the main groove slider (12) are provided with male protrusions (13) corresponding to the female groove (8). The male protrusions (13) are slidably engaged in the female groove (8). The bottom of the main groove slider (12) is provided with a brush (14). The brush (14) extends through the brush window (10) and is placed on the top of the resistor element fixing groove (9). The side of the main groove slider (12) away from the brush (14) is provided with an exposed mating block (15). The exposed mating block (15) is fixedly connected to the component to be tested.

4. The linear displacement sensor of claim 3, wherein: The high-precision low-friction structure (11) includes a ball groove (16), a ball (17) and a ball mating groove (18). The upper and lower sides of the female groove (8) are provided with ball grooves (16), and multiple sets of balls (17) are provided in the ball grooves (16). The upper and lower sides of the male protrusion (13) are provided with ball mating grooves (18) corresponding to the multiple sets of balls (17).

5. The linear displacement transducer according to claim 4, characterized in that: The adjustable resistive conductive component (5) includes a plastic flat mold (19) and a strip-shaped conductive material coating (20). The plastic flat mold (19) is fixedly installed in the resistive element fixing groove (9). The side of the plastic flat mold (19) near the brush window (10) is coated with a strip-shaped conductive material coating (20). The brush (14) contacts and is electrically connected to the strip-shaped conductive material coating (20). A first electrical contact block (21) is provided at the opening on one side of the high-precision slide rail (2). The adjustable resistive conductive component (5) is electrically connected to the circuit assembly in the shell substrate (1) through the first electrical contact block (21). A second electrical contact structure (22) is provided on one side of the female groove (8).

6. A limitable linear displacement sensor according to claim 5, characterized in that: The second electrical connection structure (22) includes an electrical connection component groove (23), a composite graphene conductive strip (24), and an electrical connection slider (25). An electrical connection component groove (23) is provided on the side of a set of female grooves (8) away from the center. A composite graphene conductive strip (24) is fixedly installed in the electrical connection component groove (23). An electrical connection slider (25) corresponding to the composite graphene conductive strip (24) is provided on the male protrusion (13). The electrical connection slider (25) is electrically connected to the composite graphene conductive strip (24). The high-precision slider (3) is electrically connected to the circuit components inside the shell substrate (1) through the second electrical connection structure (22). The high-precision slider (3), the adjustable resistance conductive element (5), the first electrical connection block (21), and the second electrical connection structure (22) form a closed loop with the circuit components inside the shell substrate (1).

7. A limitable linear displacement sensor according to claim 2, characterized in that: The adjustable limiting component (4) includes a limiting cap (26) and two sets of fixing feet (27). The high-precision slide rail (2) is slidably engaged with the limiting cap (26) on the outside. Both ends of the limiting cap (26) are provided with fixing feet (27). The fixing feet (27) are provided with first fixing holes (28). The high-precision slide rail (2) is provided with multiple sets of equidistant second fixing holes (29). The adjustable limiting component (4) is fixedly installed on the high-precision slide rail (2) by bolts.

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