High-voltage switch

Abstract

The utility model relates to a high-voltage switch, which comprises a shell and a switch assembly, the switch assembly comprises a shell, an ejector pin, a top cap, a spring, an adjusting screw and a microswitch, one end of the shell is in threaded connection with the adjusting screw, the top cap is in sliding connection with an inner cavity of the shell, one end of the top cap is elastically connected with the adjusting screw through the spring, and the microswitch is fixed on one side of the shell. A cover shell is fixed to one end of the shell, the ejector pin is slidably connected to an inner cavity of the cover shell, one end of the ejector pin abuts against the other end, away from the adjusting screw, of the top cap, and a through hole communicated with the inner cavity of the cover shell is formed in one end of the cover shell. The high-pressure switch can realize high-pressure switching action, the highest pressure can reach 20MPa, the high-pressure control field requirements of agricultural machinery, traffic engineering machinery, heavy building machinery, compressors, pneumatic tools and the like are met, the mechanical structure is high in reliability, the stainless steel material can be compatible with various acid-base media, and the full-sealing structure has excellent external protection capability.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure switches, in particular to a high-voltage switch. Background Art

[0002] In high-pressure control fields such as agricultural machinery, transportation engineering machinery and heavy construction machinery, compressors, pneumatic tools, etc., conventional pressure switches use stainless steel discs as pressure sensing elements and are not suitable for such high-pressure working conditions. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a high-voltage switch with simple structure, convenient assembly, good sealing and long service life.

[0004] The utility model is realized through the following technical solutions:

[0005] A high-voltage switch comprises a hollow shell and a switch assembly arranged in the shell, the switch assembly comprises a shell, a ejector pin, a top cap, a spring, an adjusting screw and a micro switch, the shell is fixed in the shell, the shell is a hollow structure with an opening at one end, the adjusting screw is threadedly connected to the other end of the shell, one end of the adjusting screw extends to the inner cavity of the shell, the top cap is slidably connected to the inner cavity of the shell, one end of the top cap is elastically connected to the adjusting screw through a spring, and the other end of the top cap extends out of the opening of the shell, the micro switch is fixed to one side of the shell, the contact of the micro switch abuts against the end of the top cap in the inner cavity of the shell, a cover shell is fixed at one end of the shell, the ejector pin is slidably connected to the inner cavity of the cover shell, one end of the ejector pin abuts against the other end of the top cap away from the adjusting screw, and a through hole connecting the inner cavity of the cover shell is opened at one end.

[0006] In order to facilitate the disassembly and assembly of the internal switch assembly, the cover shell and the shell are connected by threads. The end of the cover shell away from the shell has a guide part for the ejector pin to slide. One end of the guide part is provided with a through hole connected to its inner cavity, and the diameter of the through hole is smaller than the diameter of the ejector pin.

[0007] In order to limit the position of the top cap, a retaining ring is arranged in the cover shell, one end of the top cap abuts against the retaining ring, and the ejector pin passes through the retaining ring and abuts against the top cap.

[0008] In order to ensure insulation, an insulating gasket is provided between the retaining ring and the end surface of the shell.

[0009] In order to guide the ejector pin and ensure its sealing and insulation, an O-ring and a nylon pad are arranged between the ejector pin and the inner cavity of the housing.

[0010] In order to prevent internal components from being exposed to the outside, epoxy resin is poured into the gaps in the shell.

[0011] The beneficial effects of the utility model are as follows: the high-pressure switch can realize high-pressure switching action, up to 20MPa, meeting the needs of high-pressure control fields such as agricultural machinery, transportation engineering machinery and heavy construction machinery, compressors, pneumatic tools, etc. The mechanical structure has high reliability, the stainless steel material is compatible with various acid and alkali media, and the fully sealed structure has excellent external protection capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the high-voltage switch of the utility model;

[0013] Figure 2 It is a cross-sectional view of the high voltage switch of the utility model. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more specific definition of the protection scope of the present invention. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only for reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, rather than to limit the present invention.

[0015] like Figure 1 A high-voltage switch shown in the figure comprises a hollow shell 1 and a switch assembly arranged in the shell 1. The shell 1 is a cylindrical structure with openings at both ends. A cover 2 is detachably provided at one end. The shell 1 and the cover 2 are both made of stainless steel.

[0016] Specifically, combined Figure 2As shown, the switch assembly includes a shell 3, a pin 5, a top cap 4, a spring 6, an adjusting screw 7 and a micro switch 8. The shell 3 is fixed in the shell 1, and a clearance fit is adopted between the shell 3 and the shell 1. The shell 3 is a hollow structure with an opening at one end (the bottom end in the figure), and the adjusting screw 7 is threadedly connected to the other end (the top end in the figure) of the shell 3. One end (the bottom end in the figure) of the adjusting screw 7 extends to the inner cavity of the shell 3. The top cap 4 is slidably connected to the inner cavity of the shell 3. One end (the top end in the figure) of the top cap 4 is elastically connected to the bottom end of the adjusting screw 7 through the spring 6. The top end of the top cap 4 has a positioning groove for the elastic 6 to be embedded. The contraction force of the spring 6 can be adjusted by rotating the adjusting screw 7. The other end (the bottom end in the figure) of the top cap 4 extends out of the opening of the shell 3. The micro switch 8 is fixed to one side of the shell 3. One side of the shell 3 has a notch connected to its inner cavity. The contact of the micro switch 8 abuts against the top end of the top cap 4 in the inner cavity of the shell 3. The lead 9 of the micro switch 8 The cover 2 is connected to the bottom of the housing 3 by a thread. The cover 2 has a guide portion 10 at the center of one end (the bottom end in the figure) away from the housing 3, and the ejector 5 is slidably connected to the inner cavity of the guide portion 10. The ejector 5 is coaxially arranged with the spring 6. One end (the top end in the figure) of the ejector 5 is against the bottom end of the top cap 4. The bottom end of the guide portion 10 is provided with a through hole 11 connected to the inner cavity thereof. The diameter of the through hole 11 is smaller than the diameter of the ejector 5. A retaining ring 1 is arranged in the cover 2. 2. The retaining ring 12 is made of aluminum. The bottom end of the top cap 4 abuts against the retaining ring 12. The ejector pin 5 penetrates the retaining ring 12 and abuts against the bottom end of the top cap 4. In addition, an insulating gasket 13 is arranged between the retaining ring 12 and the end face of the shell 3. The insulating gasket 13 is made of nylon material. An O-ring 14 and a nylon pad 15 are arranged between the ejector pin 5 and the inner cavity of the guide part 10 to ensure insulation and sealing. When the switch assembly is assembled, epoxy resin 16 is filled into the shell 1 to ensure its insulation.

[0017] When the ejector pin 5 is subjected to pressure, the ejector pin 5 pushes the top cap 4 to move upward along the housing 3, the spring 6 contracts, and the top cap 4 triggers the micro switch 8 to send a signal. When the ejector pin 5 is not subjected to force, the spring 6 pushes the top cap 4 to return to its original position.

[0018] It should be noted that the parts not involved in the present invention are the same as the existing technology or can be implemented by using the existing technology.

[0019] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A high voltage switch, comprising a hollow housing and a switch assembly disposed in the housing, characterized in that: The switch assembly includes a shell, a ejector pin, a top cap, a spring, an adjusting screw and a micro switch. The shell is fixed in the outer shell. The shell is a hollow structure with an opening at one end. The adjusting screw is threadedly connected to the other end of the shell. One end of the adjusting screw extends to the inner cavity of the shell. The top cap is slidably connected to the inner cavity of the shell. One end of the top cap is elastically connected to the adjusting screw through a spring, and the other end of the top cap extends out of the opening of the shell. The micro switch is fixed to one side of the shell. The contacts of the micro switch abut against the end of the top cap in the inner cavity of the shell. A cover is fixed at one end of the outer shell. The ejector pin is slidably connected to the inner cavity of the cover. One end of the ejector pin abuts against the other end of the top cap away from the adjusting screw. A through hole connecting the inner cavity of the cover is provided at one end.

2. The high voltage switch according to claim 1, characterized in that: The cover shell is connected to the housing by threaded connection. The end of the cover shell away from the housing has a guide part for the ejector pin to slide. One end of the guide part is provided with a through hole connected to its inner cavity. The diameter of the through hole is smaller than the diameter of the ejector pin.

3. The high voltage switch according to claim 2, characterized in that: A retaining ring is arranged in the cover shell, one end of the top cap abuts against the retaining ring, and the ejector pin passes through the retaining ring and abuts against the top cap.

4. The high voltage switch according to claim 3, characterized in that: An insulating gasket is arranged between the retaining ring and the end surface of the shell.

5. The high voltage switch according to claim 3, characterized in that: An O-ring and a nylon pad are arranged between the ejector pin and the inner cavity of the housing.

6. The high voltage switch according to claim 1, characterized in that: The gap in the shell is filled with epoxy resin.

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