A linear displacement sensor with double spring return

Abstract

The utility model discloses a kind of linear displacement sensors of double spring reset, belong to linear displacement sensor technical field, including the shell of linear displacement sensor, detection component and detection probe, detection component includes spring, guide rod, slider, magnet and circuit board, circuit board is set in shell, slider is set in shell, magnet is fixedly set on the side of slider close to circuit board, shell is provided with magnetic shield, slider is between magnetic shield and circuit board, shell is fixedly connected with installation cylinder, detection probe is fixedly connected on slider by passing through installation cylinder, two are mirror image set in shell in guide rod, detection probe is between two guide rods, guide hole is opened on slider, guide hole is sleeved on guide rod, spring is sleeved on guide rod, spring is provided with two, two spring is respectively sleeved on two guide rods, one end of spring is abutting on slider, the other end of spring is abutting on shell, the utility model has the advantage of improving the reset stability of detection probe.

Description

Technical Field

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

[0002] A linear displacement sensor is a precision measuring device used to measure the distance an object moves in a straight line. It is widely used in industrial automation, machinery manufacturing, robot control, aerospace, and other fields. The core function of a linear displacement sensor is to convert mechanical displacement into an electrical signal for further analysis and processing, thereby enabling precise monitoring and control of the object's position.

[0003] A linear displacement sensor includes a housing, a detection element, a detection probe, and an output circuit. The detection element detects displacement. The detection probe follows the movement of the object being measured. The output circuit converts the detection signal into a standard voltage or current output. A spring is also installed in the housing; when the detection probe moves with the object, the spring pushes the probe to automatically reset, allowing the sensor to perform continuous and stable measurements.

[0004] Regarding the above technical conditions, there is also the defect that linear displacement sensors generally use a single spring for reset, but the structure of a single spring is not stable enough, resulting in poor reset stability of the detection probe.

[0005] Based on this, this utility model designs a linear displacement sensor with dual spring reset to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a linear displacement sensor with dual spring reset to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a linear displacement sensor with dual spring reset, comprising a housing, a detection component, and a detection probe. The detection component is disposed in the housing and includes a spring, a guide rod, a slider, a magnet, and a circuit board. The circuit board is disposed in the housing, and the slider is disposed in the housing. The magnet is fixedly disposed on the side of the slider near the circuit board. A magnetic shield is disposed in the housing, and the slider is located between the magnetic shield and the circuit board. A mounting cylinder is fixedly connected to the housing. The detection probe passes through the mounting cylinder and is fixedly connected to the slider. Two guide rods are disposed in the housing, mirror-arranged within the housing. The detection probe is located between the two guide rods. A guide hole is formed on the slider, and the guide hole is fitted onto the guide rod. Two springs are fitted onto the guide rods, with one end of each spring abutting against the slider and the other end abutting against the housing.

[0008] Preferably, a spacer is fixedly disposed in the mounting cylinder, the spacer is sleeved on the detection probe, and the spacer is made of powder metallurgy material.

[0009] Preferably, a sealing ring is provided on the mounting cylinder, and the sealing ring is fitted onto the detection probe.

[0010] Preferably, the housing includes a front shell and a rear cover, the rear cover is connected to the front shell by self-tapping screws, and the mounting sleeve is fixedly disposed on the front shell.

[0011] Preferably, the rear cover has a first limiting groove, the front shell has a second limiting groove, one end of the guide rod is pressed against the first limiting groove, the other end of the guide rod is pressed against the second limiting groove, and the spring is located between the first limiting groove and the guide hole.

[0012] Preferably, the front shell has a positioning groove that communicates with the second limiting groove, and one end of the slider is inserted into the positioning groove.

[0013] In summary, this application has the following beneficial technical effects: When using a linear displacement sensor for measurement, the detection probe retracts into the housing as the object being measured moves, the slider moves backward under the action of the guide rod and guide hole, and the spring is compressed; when the object leaves the detection probe, the spring loses its external force and extends back to its original position, and the slider and detection probe are reset under the action of the spring. Because there are two guide rods and two springs, and the detection probe is located between the two guide rods, a stable structure is formed between the detection probe, slider, guide rod, and spring. During the retraction and reset of the detection probe and the backward movement and reset of the slider, the movement of the detection probe and slider is relatively stable and less prone to deviation, thus improving the reset stability of the detection probe. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying 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.

[0015] Figure 1 This is a schematic diagram of the linear displacement sensor in this embodiment;

[0016] Figure 2 This is a side view of the linear displacement sensor in this embodiment;

[0017] Figure 3 This is a cross-sectional structural diagram of the linear displacement sensor in this embodiment;

[0018] Figure 4 This is a schematic diagram of the installation structure of the linear displacement sensor in this embodiment.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Housing; 2. Mounting cylinder; 3. Sealing ring; 4. Detection probe; 5. Rear cover; 6. Guide rod; 7. Spring; 8. Guide hole; 9. Spacer; 10. First limiting groove; 11. Slider; 12. Positioning groove; 13. Second limiting groove; 14. Front shell; 15. Circuit board; 16. Magnet; 17. Self-tapping screw; 18. Magnetic shield. Detailed Implementation

[0021] 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.

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] A linear displacement sensor with dual spring reset includes a housing 1, a detection component, and a detection probe 4. The detection component is disposed in the housing 1 and includes a spring 7, a guide rod 6, a slider 11, a magnet 16, and a circuit board 15. The circuit board 15 is disposed in the housing 1, the slider 11 is disposed in the housing 1, and the magnet 16 is fixedly disposed on the side of the slider 11 near the circuit board 15.

[0024] A magnetic shield 18 is provided in the housing 1, and the slider 11 is between the magnetic shield 18 and the circuit board 15. The magnetic shield 18 serves to shield or isolate the magnetic field. It is usually made of magnetically conductive material to prevent the magnetic field generated by the magnet 16 from leaking out of the housing 1 and interfering with the surrounding equipment.

[0025] A mounting cylinder 2 is fixedly connected to the housing 1, and the detection probe 4 passes through the mounting cylinder 2 and is fixedly connected to the slider 11. Two guide rods 6 are arranged mirror images of each other within the housing 1, and the detection probe 4 is positioned between the two guide rods 6. A guide hole 8 is provided on the slider 11, and the guide hole 8 is fitted onto the guide rod 6.

[0026] Two springs 7 are provided, each sleeved on one of the two guide rods 6. One end of each spring 7 abuts against the slider 11, and the other end abuts against the housing 1. When the detection probe 4 moves with the object being measured, the detection probe 4 retracts into the housing 1, the slider 11 moves backward, and the spring 7 is compressed. When the object leaves the detection probe 4, the spring 7 loses its external force and extends back to its original position, and the slider 11 and the detection probe 4 are reset under the action of the spring 7.

[0027] Under the action of guide rod 6, the contraction and extension of spring 7 are relatively stable and not prone to deviation. Under the action of guide hole 8, the movement of slider 11 in housing 1 is stable along the direction of guide rod 6 and is also not prone to deviation. At the same time, since there are two guide rods 6 and spring 7, and the detection probe 4 is between the two guide rods 6, the movement of detection probe 4 and slider 11 is relatively stable and not prone to shaking during the processes of detection probe 4 retracting into housing 1, slider 11 moving backward, and detection probe 4 and slider 11 resetting under the action of spring 7.

[0028] A spacer 9 is fixedly installed in the mounting cylinder 2, and the spacer 9 is fitted onto the detection probe 4. The spacer 9 is made of powder metallurgy material, which has a self-lubricating function, reducing the friction between the spacer 9 and the detection probe 4, minimizing the impact of friction on the accuracy of the detection probe 4's movement, and protecting the detection probe 4 from being caught on the spacer 9, thus extending the service life of the detection probe 4. A sealing ring 3 is provided on the mounting cylinder 2, and the sealing ring 3 is fitted onto the detection probe 4, serving a sealing function.

[0029] The housing 1 includes a front cover 14 and a rear cover 5. The rear cover 5 is connected to the front cover 14 by self-tapping screws 17. The mounting cylinder 2 is fixedly disposed on the end of the front cover 14 away from the rear cover 5. A first limiting groove 10 is formed on the rear cover 5, and a second limiting groove 13 is formed on the front cover 14. One end of the guide rod 6 is pressed against the first limiting groove 10, and the other end of the guide rod 6 is pressed against the second limiting groove 13. A spring 7 is located between the first limiting groove 10 and the guide hole 8. When the rear cover 5 is connected to the front cover 14 by self-tapping screws 17, the guide rod 6 is fixedly positioned between the first limiting groove 10 and the second limiting groove 13, increasing the installation stability of the guide rod 6 in the housing 1.

[0030] The front shell 14 has a positioning groove 12, which communicates with the second limiting groove 13. One end of the slider 11 is inserted into the positioning groove 12. With the setting of the guide hole 8 on the slider 11 and the positioning groove 12 on the front shell 14, the installation stability of the slider 11 in the shell 1 is better when the slider 11 is in the initial position.

[0031] The implementation principle of this embodiment is as follows: When using a linear displacement sensor for measurement, the detection probe 4 retracts into the housing 1 as the object being measured moves, and the slider 11 moves backward under the action of the guide rod 6 and the guide hole 8, compressing the spring 7. When the object leaves the detection probe 4, the spring 7 loses its external force and extends back to its original position, and the slider 11 and the detection probe 4 are reset under the action of the spring 7. Since there are two guide rods 6 and two springs 7, and the detection probe 4 is located between the two guide rods 6, a stable structure is formed between the detection probe 4, the slider 11, the guide rods 6, and the spring 7. During the retraction and reset of the detection probe 4 and the backward movement and reset of the slider 11, the movement of the detection probe 4 and the slider 11 is relatively stable and not prone to deviation, thus improving the reset stability of the detection probe 4.

[0032] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] 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 dual spring reset, comprising a housing (1) of the linear displacement sensor, a detection assembly, and a detection probe (4), characterized in that: The detection assembly is disposed in the housing (1). The detection assembly includes a spring (7), a guide rod (6), a slider (11), a magnet (16), and a circuit board (15). The circuit board (15) is disposed in the housing (1). The slider (11) is disposed in the housing (1). The magnet (16) is fixedly disposed on the side of the slider (11) near the circuit board (15). A magnetic shield (18) is disposed in the housing (1). The slider (11) is located between the magnetic shield (18) and the circuit board (15). A mounting cylinder (2) is fixedly connected to the housing (1). The detection probe (4) passes through the mounting cylinder. The cylinder (2) is fixedly connected to the slider (11). The guide rod (6) is set in the housing (1). There are two guide rods (6) mirrored in the housing (1). The detection probe (4) is between the two guide rods (6). The slider (11) has a guide hole (8). The guide hole (8) is sleeved on the guide rod (6). The spring (7) is sleeved on the guide rod (6). There are two springs (7). The two springs (7) are respectively sleeved on the two guide rods (6). One end of the spring (7) abuts against the slider (11), and the other end of the spring (7) abuts against the housing (1).

2. A linear displacement sensor with dual spring reset according to claim 1, characterized in that: A spacer (9) is fixedly installed in the mounting cylinder (2). The spacer (9) is fitted onto the detection probe (4). The spacer (9) is made of powder metallurgy material.

3. A linear displacement sensor with dual spring reset according to claim 1, characterized in that: A sealing ring (3) is provided on the mounting cylinder (2), and the sealing ring (3) is sleeved on the detection probe (4).

4. A linear displacement sensor with dual spring reset according to claim 1, characterized in that: The housing (1) includes a front shell (14) and a rear cover (5). The rear cover (5) is connected to the front shell (14) by self-tapping screws (17). The mounting cylinder (2) is fixedly mounted on the front shell (14).

5. A linear displacement sensor with dual spring reset according to claim 4, characterized in that: The rear cover (5) has a first limiting groove (10), the front shell (14) has a second limiting groove (13), one end of the guide rod (6) is pressed against the first limiting groove (10), the other end of the guide rod (6) is pressed against the second limiting groove (13), and the spring (7) is between the first limiting groove (10) and the guide hole (8).

6. A linear displacement sensor with dual spring reset according to claim 5, characterized in that: The front shell (14) is provided with a positioning groove (12), which is connected to the second limiting groove (13), and one end of the slider (11) is inserted into the positioning groove (12).

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