A proximity switch protection device

Abstract

The utility model discloses a proximity switch protection device relates to the technical field of automobile manufacturing, it includes the protection sleeve of proximity switch detection end's cover, still includes support seat, and the protection sleeve is made of stainless steel material, including the pipe body of upper end closed, is provided with the cavity of being suitable for the proximity switch detection end in the pipe body, support seat includes fixed sleeve, and the pipe body is inserted and is installed in fixed sleeve and can carry out axial movement and rotation movement, the lateral wall of fixed sleeve is set up and is provided with the limit hole in location bolt, and the location bolt is used for the close pipe body, and then fixes the relative position between pipe body and fixed sleeve. The utility model discloses simple structure, low in cost, protection is comprehensive, is convenient for adjusting, can significantly reduce the failure rate of proximity switch in welding workshop, provides the security guarantee for setting variable stable operation.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically a proximity switch protection device. Background Technology

[0002] In automotive welding workshops, resistance spot welding is the primary joining process. The welding process generates a large amount of metal spatter and dust, accompanied by a strong, transient electromagnetic field. Proximity switches, as non-contact position detection elements, face significant challenges when applied in this environment. 1. Splashes and dust: High-temperature metal splashes are very easy to adhere to the sensing surface of the proximity switch, causing its sensing distance to decrease or even fail. Dust accumulation will also affect heat dissipation and performance.

[0003] 2. Magnetic field interference: The large current during spot welding generates an extremely strong alternating magnetic field, which interferes with the magnetic core and electronic components inside the proximity switch, causing false signals or damage.

[0004] 3. Mechanical impact and adjustment: Equipment, tools or workpieces are frequently moved in the workshop, and proximity switches are easily damaged by accidental collisions.

[0005] Currently, conventional protective measures, such as adding simple metal covers or plastic sleeves, are either incomplete in their protection (e.g., they cannot prevent magnetism) or have complex structures, high costs, and are inconvenient to adjust, making it difficult to meet the high-strength and high-reliability requirements of welding workshops.

[0006] Therefore, there is an urgent need for a proximity switch protection device that can comprehensively solve the above problems, and has the functions of preventing splashes, preventing magnetic interference, preventing impacts, and being easy to adjust. Utility Model Content

[0007] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a proximity switch protection device, which has a simple structure, low cost, comprehensive protection, and is easy to adjust. It can significantly reduce the failure rate of proximity switches in the welding workshop and provide a safety guarantee for the stable operation of equipment and transformers.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a proximity switch protection device, comprising a protective sleeve fitted onto the detection end of the proximity switch, and a support base. The protective sleeve is made of stainless steel and includes a tube with a closed upper end, and a cavity adapted to the detection end of the proximity switch is provided inside the tube. The support base includes a fixing sleeve, and the tube is inserted into the fixing sleeve and can move axially and rotate. A limiting hole is provided on the side wall of the fixing sleeve, and a positioning bolt is provided in the limiting hole. The positioning bolt is used to press against the tube, thereby fixing the relative position between the tube and the fixing sleeve.

[0009] A further improvement is that an expansion head adapted to the fixing sleeve is provided at the upper end of the tube body.

[0010] A further improvement is that the outer wall of the expansion head is provided with a mounting hole, and a locking bolt is provided in the mounting hole. The locking bolt is used to press against the detection end of the proximity switch, thereby fixing the relative position between the tube body and the proximity switch.

[0011] A further improvement is that an annular limiting groove is provided in the middle of the top surface of the expansion head.

[0012] A further improvement is that both ends of the tube extend from the fixing sleeve.

[0013] A further improvement is that the support base is made of Q235A material.

[0014] A further improvement is that the support base also includes a bracket connected to the outer wall of the fixed sleeve.

[0015] A further improvement is that the bracket and the fixing sleeve are an integral structure.

[0016] A further improvement is that the bracket includes a horizontal plate, one end of which is connected to the outer wall of the fixing sleeve, and the other end of which is bent downward to form a vertical plate.

[0017] A further improvement is that the lower end of the vertical plate is provided with several horizontal waist holes.

[0018] The beneficial effects of this utility model are as follows: 1. In this utility model, the stainless steel protective sleeve can effectively resist magnetic field interference and isolate splashing dust, and the sturdy cylindrical structure can resist accidental impact, thus comprehensively improving the environmental adaptability of the proximity switch.

[0019] 2. In this utility model, the protective sleeve can move and rotate axially within the support base, providing greater adjustment freedom, accurately adapting to the testing needs of different installation positions, and saving installation space.

[0020] 3. In this utility model, the entire device is composed of a small number of machined parts and standard parts, which is simple to process and manufacture, easy to mass-produce, and has low overall cost.

[0021] 4. In this utility model, when the protective cover is damaged due to excessive splashing, it can be quickly replaced simply by loosening the bolts, resulting in extremely low maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the proximity switch protection device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the protective sleeve in an embodiment of this utility model; Figure 3 This is a perspective view of the protective sleeve in an embodiment of this utility model; Figure 4 This is a schematic diagram of the support base in an embodiment of the present utility model.

[0023] Figure label: 1- Proximity switch; 2-Protective sleeve; 21-Tube body; 22-Cavity; 23-Expansion head; 24-Mounting hole; 25-Limiting groove; 3-Support base; 31-Fixing sleeve; 32-Limiting hole; 33-Horizontal plate; 34-Vertical plate; 35-Horizontal waist hole. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0025] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying 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. They should not be construed as limiting the specific protection scope of this utility model.

[0026] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0027] See Figures 1-4 As shown, this embodiment of the utility model provides a proximity switch protection device, including a protective sleeve 2 fitted onto the detection end of the proximity switch 1, and a support base 3. In this embodiment, the proximity switch 1 is model BES M12ME-PSC40A-S04G-W08, brand: Balluff.

[0028] The protective sleeve 2 is made of stainless steel and includes a tube 21 closed at the top, with a cavity 22 inside the tube 21 that matches the detection end of the proximity switch 1. Specifically, an expansion head 23 that matches the fixing sleeve 31 is provided at the upper end of the tube 21. The outer wall of the expansion head 23 has a mounting hole 24, and a locking bolt is provided within the mounting hole 24. The locking bolt is used to press against the detection end of the proximity switch 1, thereby fixing the relative position between the tube 21 and the proximity switch 1. An annular limiting groove 25 is provided in the center of the top surface of the expansion head 23. Both ends of the tube 21 extend from the fixing sleeve 31.

[0029] The support base 3 includes a fixed sleeve 31, into which the tube body 21 is inserted and can move axially and rotate. A limiting hole 32 is formed on the side wall of the fixed sleeve 31, and a positioning bolt is installed within the limiting hole 32. The positioning bolt is used to press against the tube body 21, thereby fixing the relative position between the tube body 21 and the fixed sleeve 31. Specifically, the support base 3 is made of Q235A material. The support base 3 also includes a bracket connected to the outer wall of the fixed sleeve 31. The bracket and the fixed sleeve 31 are an integral structure. The bracket includes a horizontal plate 33, one end of which is connected to the outer wall of the fixed sleeve 31, and the other end of which is bent downwards to form a vertical plate 34. Several transverse waist holes 35 are provided at the lower end of the vertical plate 34.

[0030] The working principle of this utility model: Anti-magnetic interference: The protective cover is made of stainless steel with low magnetic permeability, which "guides" most of the external interference magnetic field to bypass its internal space, thereby protecting the internal proximity switch and making it only able to sense the metal target that needs to be detected when it is aligned with its front end, which greatly reduces the false trigger rate.

[0031] Splash and impact protection: All welding spatter and dust will only fall on the outer surface of the protective sleeve, especially on the closed end face, where the sensing surface is protected inside, completely avoiding contamination and ensuring the stability of the detection distance; maintenance only requires cleaning or replacing the protective sleeve, which is extremely low cost; any accidental impact force from the side or front will be jointly borne and dispersed by the protective sleeve and the support base, and the force acting directly on the proximity switch is very small, effectively preventing its mechanical damage.

[0032] Two-stage adjustment: Slide the axial direction forward or backward to directly adjust the length of the protective sleeve and the internal switch extension, i.e., adjust the sensing distance; rotate the protective sleeve to adjust the angle of the induction switch to adapt to different installation angles and detection surfaces.

[0033] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A proximity switch protection device, comprising a protective sleeve (2) fitted onto the detection end of a proximity switch (1), characterized in that: It also includes a support base (3), the protective sleeve (2) is made of stainless steel and includes a tube (21) with the upper end closed. The tube (21) has a cavity (22) that is adapted to the detection end of the proximity switch (1). The support base (3) includes a fixing sleeve (31), the tube (21) is inserted into the fixing sleeve (31) and can move axially and rotate. The side wall of the fixing sleeve (31) has a limit hole (32) and a positioning bolt is provided in the limit hole (32). The positioning bolt is used to press against the tube (21) and thus fix the relative position between the tube (21) and the fixing sleeve (31).

2. The proximity switch protection device according to claim 1, characterized in that: The upper end of the tube (21) is provided with an expansion head (23) that is compatible with the fixed sleeve (31).

3. The proximity switch protection device according to claim 2, characterized in that: The outer wall of the expansion head (23) is provided with a mounting hole (24), and a locking bolt is provided in the mounting hole (24). The locking bolt is used to press against the detection end of the proximity switch (1), thereby fixing the relative position between the tube body (21) and the proximity switch (1).

4. The proximity switch protection device according to claim 2, characterized in that: The expansion head (23) has an annular limiting groove (25) in the middle of its top surface.

5. The proximity switch protection device according to claim 1, characterized in that: Both ends of the tube (21) extend from the fixing sleeve (31).

6. The proximity switch protection device according to claim 1, characterized in that: The support base (3) is made of Q235A material.

7. The proximity switch protection device according to claim 1, characterized in that: The support base (3) also includes a bracket connected to the outer wall of the fixing sleeve (31).

8. The proximity switch protection device according to claim 7, characterized in that: The bracket and the fixing sleeve (31) are an integral structure.

9. The proximity switch protection device according to claim 7, characterized in that: The bracket includes a horizontal plate (33), one end of which is connected to the outer wall of the fixing sleeve (31), and the other end of which is bent downward to form a vertical plate (34).

10. The proximity switch protection device according to claim 9, characterized in that: The lower end of the vertical plate (34) is provided with several horizontal waist holes (35).

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