Inductance type proximity switch device

Abstract

The utility model provides an inductance type proximity switch device, which comprises a magnetic shielding sleeve, an induction block fixing seat, an induction block, an inductance type proximity switch body and an elastic element, the induction block fixing seat is mounted at the end part of one end of the magnetic shielding sleeve in an axial floating manner through an elastic element; the induction block is located in the magnetic shielding sleeve and installed on the induction block fixing base. The inductance type proximity switch body is installed at the other end of the magnetic shielding sleeve, the induction end of the inductance type proximity switch body is located in the magnetic shielding sleeve and is in a face-to-face state with the induction block, and a distance is reserved between the induction end and the induction block. According to the inductive proximity switch, a measured object can be prevented from being in direct contact with the induction end of the inductive proximity switch body, interference of surrounding magnetic metal parts on the induction precision of the inductive proximity switch body can be shielded, the environmental interference resistance of the inductive proximity switch is improved, and the safety and stability of the machining process of a numerical control machine tool are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to proximity switch technical field, concretely relates to an inductive proximity switch device. BACKGROUND

[0002] Proximity switch is indispensable sensing element in numerical control machine tool, it detects tool, workpiece position and state accurately by inductive technology, ensures that processing is safe and worry-free. In the field of machining, inductive proximity switch becomes the first choice switch of numerical control machine tool with high precision, fast response, high efficiency and high safety.

[0003] Inductive proximity switch is a sensor based on electromagnetic induction principle, and is specially used for detecting the approach of magnetic metal object, but the detection ability of weak magnetic metal object is weak, and it cannot be used for the detection of nonmetal or nonmagnetic metal object. In addition, inductive proximity switch also has the defects such as limited detection distance (generally in several millimeters to tens of millimeters), poor anti-interference ability (the distance with surrounding metal object needs to be paid attention to, otherwise the detection precision and normal work will be affected), which seriously restricts the safety and stability of numerical control machine tool processing process. SUMMARY

[0004] In order to solve the technical problems in the background art, the utility model provides an inductive proximity switch device.

[0005] The utility model provides an inductive proximity switch device, which comprises a magnetic shielding sleeve, an inductive block fixing seat, an inductive block, an inductive proximity switch body and an elastic element.

[0006] The inductive block fixing seat is installed on the end of the magnetic shielding sleeve through the elastic element and can float axially.

[0007] The inductive block is located inside the magnetic shielding sleeve and is installed on the inductive block fixing seat.

[0008] The inductive proximity switch body is installed on the other end of the magnetic shielding sleeve and does not contact the elastic element, and the inductive end of the inductive proximity switch body is located inside the magnetic shielding sleeve and is in a face-to-face state with the inductive block, and a spacing is reserved between the two.

[0009] Preferably, the inductive proximity switch body is a columnar structure, a front end nut and a rear end nut matched with the threads are arranged on the outside of the inductive proximity switch body, and the front end nut and the rear end nut are located outside the magnetic shielding sleeve.

[0010] Preferably, the magnetic shielding sleeve comprises a first chamber near the end where the inductive block fixing seat is located and a second chamber located away from the end where the inductive block fixing seat is located, the inner diameter of the first chamber is larger than that of the second chamber, a limiting platform is arranged between the first chamber and the second chamber, and the second chamber is provided with an internal thread; the inductive proximity switch body is threadedly connected with the second chamber, and the inductive end thereof is located in the first chamber; the elastic element is located in the first chamber, one end thereof abuts against or is connected to the limiting platform, and the other end thereof abuts against or is connected to the inductive block fixing seat.

[0011] Preferably, one end of the magnetic shielding sleeve is provided with a top cover which is threadedly connected with the magnetic shielding sleeve, the middle part of the top cover is provided with a through hole; the inductive block fixing seat comprises an inductive block fixing end, an inductive object contact end, and a flange located between the inductive block fixing end and the inductive object contact end, the inductive block fixing end is provided with a receiving cavity, and the inductive block is installed in the receiving cavity; the inductive block fixing seat is constrained by the top cover at the end of the magnetic shielding sleeve, the inductive block fixing end thereof is located inside the magnetic shielding sleeve, the inductive object contact end thereof extends to the outside through the through hole of the top cover, and the flange thereof abuts against the inner side of the top cover under the action of the elastic element and is spaced apart from the end of the magnetic shielding sleeve.

[0012] Preferably, the receiving hole on the inductive block fixing end is a threaded hole; the inductive block comprises an inductive part and a connecting part, the connecting part is threadedly connected in the receiving hole, and the inductive part is opposite to the inductive end of the inductive proximity switch body.

[0013] Preferably, the inductive part and the connecting part are coaxial columnar structures with different diameters, and the diameter of the inductive part is smaller than that of the connecting part.

[0014] Preferably, the elastic element is a cylindrical spring, and the inductive end of the inductive proximity switch body is located inside the elastic element.

[0015] Preferably, the materials of the magnetic shielding sleeve, the elastic element, and the inductive block fixing seat are non-metallic or non-magnetic metallic materials; and the material of the inductive block is cast iron or nickel-chromium alloy.

[0016] Preferably, the surface of the magnetic shielding sleeve is provided with a graphene coating.

[0017] Preferably, the material of the top cover is non-metallic or non-magnetic metallic material, and the surface of the top cover is provided with a graphene coating.

[0018] The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1.

[0020] Figure 2 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1. Figure 1 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1.

[0021] Figure 3 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1.

[0022] Figure 4 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1.

[0023] Figure 5 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1.

[0024] Figure 6 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1. DETAILED DESCRIPTION

[0025] Referring to Figures 1-6 The utility model discloses a kind of inductive proximity switch devices, including: magnetic shield sleeve 1, induction block fixed seat 2, induction block 3, inductive proximity switch body 4, and elastic element 5 and top cap 8.Top cap 8 screw thread is capped in one end of magnetic shield sleeve 1, and the center of top cap 8 is provided with the through hole that is communicated with magnetic shield sleeve 1.

[0026] As Figure 4As shown, the magnetic shielding sleeve 1 includes a first chamber 102 near the end where the top cover 8 is located and a second chamber 101 located away from the end where the top cover 8 is located. The inner diameter of the first chamber 102 is larger than the inner diameter of the second chamber 101. A limiting platform is provided between the first chamber 102 and the second chamber 101. The second chamber 101 is provided with an internal thread.

[0027] like Figure 5 As shown, the sensor block fixing base 2 includes a sensor block fixing end 21, a sensor contact end 22, and a flange 23 located between the sensor block fixing end 21 and the sensor contact end 22, and the sensor block fixing end 21 is provided with a receiving hole with internal threads.

[0028] like Figure 6 As shown, the sensing block 3 is installed in the receiving hole, and the sensing block 3 includes a connecting part 32 that is threadedly assembled with the receiving hole, and a sensing part 31 that is connected to the connecting seat 32. The sensing part 31 and the connecting part 32 are coaxial but have different diameters of columnar structure, and the diameter of the sensing part 31 is smaller than the diameter of the connecting part 32.

[0029] The inductive proximity switch body 4 has a cylindrical structure and is externally threaded with a front nut 6 and a rear nut 7 that engage with the threads. The main body of the inductive proximity switch body 4 is threaded into the second chamber 101, and its sensing end is located inside the first chamber 102. Both the front nut 6 and the rear nut 7 are located outside the magnetic shielding sleeve 1, so that the front nut 6 and the rear nut 7 can be engaged to clamp it onto the equipment.

[0030] The elastic element 5 is a cylindrical spring located within the first chamber 102, with one end abutting against the limiting platform and the other end abutting against the flange 23. The sensing block fixing seat 2 is constrained to the end of the magnetic shielding sleeve 1 by the top cover 8, and its sensing block fixing end 21 is located inside the shielding sleeve. Its sensing object contact end 22 extends to the outside through the through hole on the top cover 8 and is slightly higher than the top opening area of ​​the top cover 8. Its flange 23 abuts against the inner side of the top cover 8 under the action of the elastic element 5 and leaves a gap between it and the port of the magnetic shielding sleeve 1 so that its sensing object contact end 22 can retract inward after being pressed. The sensing block 3 is located inside the magnetic shielding sleeve 1, and its sensing part 31 is opposite to the sensing end of the inductive proximity switch body 4. Its connecting part 32 is threaded into the receiving hole.

[0031] In this embodiment, when the inductive proximity switch device detects magnetic or non-magnetic objects, the object being tested first contacts the sensing block fixing seat 2. The built-in elastic element 5 acts as a force-relieving element and does not directly contact the inductive proximity switch body 4. When the object being tested moves and pushes the sensing block fixing seat 2 along with the built-in sensing block 3, the inductive proximity switch body 4 directly detects the displacement of the built-in sensing block 3 and thus indirectly detects the object being tested. Through indirect detection, direct contact between the object being tested and the sensing end of the inductive proximity switch body 4 is avoided, thereby protecting the inductive proximity switch body 4. Furthermore, the magnetic shielding sleeve 1 can effectively shield the surrounding magnetic metal components from interfering with the sensing accuracy of the inductive proximity switch body 4, thereby significantly improving the inductive proximity switch's resistance to environmental interference and consequently improving the safety and stability of the CNC machine tool processing.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An inductive proximity switch device, characterized in that, include: Magnetic shielding sleeve (1), sensing block fixing base (2), sensing block (3), inductive proximity switch body (4), and elastic element (5); The induction block fixing seat (2) is axially floating at one end of the magnetic shielding sleeve (1) via the elastic element (5); The sensing block (3) is located inside the magnetic shielding sleeve (1) and is mounted on the sensing block mounting base (2); The inductive proximity switch body (4) is installed at the other end of the magnetic shielding sleeve (1) and does not contact the elastic element (5). The sensing end of the inductive proximity switch body (4) is located inside the magnetic shielding sleeve (1) and is face-to-face with the sensing block (3), with a gap between them.

2. The inductive proximity switch device according to claim 1, characterized in that, The inductive proximity switch body (4) has a columnar structure with threads on its exterior and front nut (6) and rear nut (7) that engage with the threads. Both the front nut (6) and the rear nut (7) are located outside the magnetic shielding sleeve (1).

3. The inductive proximity switch device according to claim 2, characterized in that, The magnetic shielding sleeve (1) includes a first chamber (102) near the end where the sensing block fixing seat (2) is located and a second chamber (101) far from the end where the sensing block fixing seat (2) is located. The inner diameter of the first chamber (102) is larger than the inner diameter of the second chamber (101). A limiting platform is provided between the first chamber (102) and the second chamber (101). The second chamber (101) is provided with an internal thread. The inductive proximity switch body (4) is threadedly engaged with the second chamber (101), and its sensing end is located in the first chamber (102). The elastic element (5) is located in the first chamber (102), with one end abutting or connected to the limiting platform and the other end abutting or connected to the sensing block fixing seat (2).

4. The inductive proximity switch device according to claim 1, characterized in that, The magnetic shielding sleeve (1) has a top cover (8) threadedly fitted to one end, and a through hole in the middle of the top cover (8); the sensing block fixing seat (2) includes a sensing block fixing end (21), a sensing object contact end (22), and a flange (23) located between the sensing block fixing end (21) and the sensing object contact end (22), and the sensing block fixing end (21) has a receiving cavity, and the sensing block (3) is installed in the receiving cavity; the sensing block fixing seat (2) is constrained to the end of the magnetic shielding sleeve (1) by the top cover (8), and its sensing block fixing end (21) is located inside the magnetic shielding sleeve (1), and its sensing object contact end (22) extends to the outside through the through hole on the top cover (8); its flange (23) abuts against the inner side of the top cover (8) under the action of the elastic element (5) and has a gap reserved between it and the port of the magnetic shielding sleeve (1).

5. The inductive proximity switch device according to claim 4, characterized in that, The receiving hole on the fixed end (21) of the sensing block is a threaded hole; the sensing block (3) includes a sensing part (31) and a connecting part (32), the connecting part (32) is threadedly assembled in the receiving hole, and the sensing part (31) is opposite to the sensing end of the inductive proximity switch body (4).

6. The inductive proximity switch device according to claim 5, characterized in that, The sensing part (31) and the connecting part (32) are coaxial but have different diameters of columnar structure, and the diameter of the sensing part (31) is smaller than the diameter of the connecting part (32).

7. The inductive proximity switch device according to claim 1, characterized in that, The elastic element (5) is a cylindrical spring, and the sensing end of the inductive proximity switch body (4) is located inside the elastic element (5).

8. The inductive proximity switch device according to any one of claims 1-7, characterized in that, The magnetic shielding sleeve (1), the elastic element (5), and the induction block fixing seat (2) are all made of non-metallic or non-magnetic metal materials; the induction block (3) is made of cast iron or nickel-chromium alloy.

9. The inductive proximity switch device according to claim 8, characterized in that, The surface of the magnetic shielding sleeve (1) is coated with graphene.

10. The inductive proximity switch device according to claim 4, characterized in that, The top cover (8) is made of non-metallic or non-magnetic metal material; the surface of the top cover (8) is coated with graphene.

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