Modularized mechanical limit switch

Abstract

The utility model discloses a modularized mechanical limit switch, which comprises a switch main body, a single-pole switch module group or a double-pole switch module group is arranged in the switch main body, the switch main body is mainly composed of an upper cover, an induction cam group, a shaft sleeve, a first sealing ring, a base, a transparent cover, an on-site indicator and a lower clamp spring, and the induction cam group comprises a transmission shaft. Four positioning gears are fixedly installed on the transmission shaft, the positioning gears are sleeved with induction cams, and wave springs are arranged between the two induction cams on the upper portion and between the two induction cams on the lower portion. The valve is convenient to install, maintain and debug, is provided with a field indicator and remote signal output, facilitates field or remote observation of the opening and closing state of the valve, provides four groups of signals, each group of signals are mutually independent and do not influence each other, and improves the system safety and reliability under harsh working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of angular travel equipment, in particular to a modular mechanical limit switch. Background Art

[0002] With the development of industrial automation technology, automation instruments play a vital role in the entire industrial automation system.

[0003] There are a lot of pipelines and valves in industrial equipment systems. How to clearly know the opening and closing status of each valve or pipeline and observe them one by one on site is not realistic, and the efficiency is not guaranteed.

[0004] At this time, an instrument that can adapt to industrial automation is needed, which can be used for on-site viewing and remote observation of the opening and closing status of each valve pipeline.

[0005] Therefore, we propose a modular mechanical limit switch to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a modular mechanical limit switch to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a modular mechanical limit switch, comprising: a switch body, wherein a single-pole switch module group or a double-pole switch module group is arranged in the switch body;

[0008] The switch body is mainly composed of an upper cover, a sensing cam assembly, a shaft sleeve, a first sealing ring, a base, a transparent cover, a field indicator and a lower retaining spring;

[0009] The induction cam group is inductively triggered by the single-pole switch module group or the double-pole switch module group;

[0010] The induction cam group comprises a transmission shaft, four positioning gears are fixedly mounted on the transmission shaft, induction cams are arranged outside the positioning gears, and wave springs are arranged between the two upper induction cams and between the two lower induction cams;

[0011] The upper cover and the base are mechanically connected to the outside through an induction cam assembly;

[0012] The on-site indicator is fixed on the transmission shaft through a lower retaining spring and rotates synchronously with the transmission shaft.

[0013] Preferably, the single-pole switch module group mainly includes a first module housing, a single-pole micro-mechanical switch, and a first wiring terminal.

[0014] Preferably, the first module housing is filled with epoxy resin glue, a first wiring terminal is installed on one side of the first module housing, and a single-pole micro-mechanical switch is provided in the first module housing.

[0015] Preferably, a plurality of second sealing rings are sleeved on the lower part of the transmission shaft, an upper retaining spring is sleeved on the lower end of the transmission shaft, and the transmission shaft is fixed to the base through the upper retaining spring, the shaft sleeve and the middle retaining spring.

[0016] Preferably, the double-pole switch module group mainly includes a double-pole micro-mechanical switch, a cable, a second wiring terminal, a base plate, a reserved wiring post, and a pad.

[0017] Preferably, the bottom plate is symmetrically provided with second wiring terminals, reserved wiring posts are provided between the second wiring terminals, pads and double-pole micro-mechanical switches are stacked at intervals on the bottom plate, and a cable connects the double-pole micro-mechanical switch and the second wiring terminals.

[0018] Preferably, the double-pole micro-mechanical switch mainly includes a trigger button, pins, a second module housing and a fixing hole, a plurality of pairs of pins are symmetrically arranged on both sides of the second module housing, a trigger button is arranged on one side of the second module housing, and the trigger button and the induction cam sense the trigger.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The switch adopts a modular functional component structure, which is convenient for installation, maintenance and debugging. It is equipped with an on-site indicator and remote signal output, which is convenient for on-site or remote observation of the opening and closing status of the valve;

[0021] 2. The on-site manually adjustable sensing cam is convenient for special working conditions and provides opening and closing status monitoring at any angle;

[0022] 3. Provide four groups of signals, each group of signals is independent and does not affect each other, which improves the system safety and reliability under harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the sensing cam group in the first embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a single-pole switch module group in Embodiment 1 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a double-pole switch module group in Embodiment 2 of the present invention;

[0028] Figure 6 Schematic diagram of the structure of a double-pole micro-mechanical switch in Embodiment 2 of the present invention.

[0029] In the figure: 1. upper cover; 2. induction cam group; 201. transmission shaft; 202. positioning gear; 203. induction cam; 204. second sealing ring; 205. upper retaining spring; 206. positioning pin; 207. wave spring; 3. single-pole switch module group; 31. first module housing; 32. single-pole micro-mechanical switch; 33. first terminal; 4. bushing; 5. first sealing ring; 6. base; 7. transparent cover; 8. field indicator; 9. lower retaining spring; 10. double-pole switch module group; 101. double-pole micro-mechanical switch; 1011. trigger button; 1012. pin; 1013. second module housing; 1014. fixing hole; 102. second terminal; 103. reserved terminal; 104. cable; 105. bottom plate; 106. pad. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1-3 , the present invention provides a technical solution: a modular mechanical limit switch, comprising: a switch body, in which a single-pole switch module group 3 is arranged;

[0032] The switch body is mainly composed of an upper cover 1, a sensing cam assembly 2, a shaft sleeve 4, a first sealing ring 5, a base 6, a transparent cover 7, a field indicator 8 and a lower retaining spring 9;

[0033] The induction cam assembly 2 comprises a transmission shaft 201, on which four positioning gears 202 are fixedly mounted, and an induction cam 203 is disposed outside the positioning gear 202, and a wave spring 207 is disposed between the upper two induction cams 203 and between the lower two induction cams 203;

[0034] A plurality of second sealing rings 204 are sleeved on the lower part of the transmission shaft 201, and an upper retaining ring 205 is sleeved on the lower end of the transmission shaft 201;

[0035] The single-pole switch module group 3 mainly includes a first module housing 31, a single-pole micro-mechanical switch 32, and a first wiring terminal 33;

[0036] The first module housing 31 is filled with epoxy resin glue, a first wiring terminal 33 is installed on one side of the first module housing 31, and a single-pole micro-mechanical switch 32 is arranged in the first module housing 31;

[0037] The first wiring terminal 33 is connected to the user monitoring cable to output the position signal as an electrical signal, thereby realizing remote observation of the valve pipeline opening and closing status;

[0038] The upper cover 1 and the base 6 are mechanically connected to the outside through the induction cam group 2. A hole is punched on the transmission shaft 201, and the positioning gear 202 is fixed by the positioning pin 206. The induction cam 203 is sleeved on the positioning gear 202 to facilitate the adjustment of the angle position. The three are connected by gears to ensure the synchronization of the rotation movement. The transmission shaft 201 is fixed to the base 6 through the upper retaining ring 205, the shaft sleeve 4 and the middle retaining ring. One or more second sealing rings 204 are installed between the transmission shaft 201 and the shaft sleeve 4 to improve the sealing performance of the product;

[0039] The on-site indicator 8 is fixed on the transmission shaft 201 through the lower retaining spring 9 and rotates synchronously with the transmission shaft 201. The indicator plate of the on-site indicator 8 is provided with an OPEN / COLOSE mark, which can display the current switch position state, facilitating on-site observation;

[0040] Devices with external rotary motion can be directly connected to the transmission shaft 201, and devices with external reciprocating motion can be transferred to the transmission shaft 201 through a multifunctional bracket;

[0041] The rotational motion of the external device is converted into the rotational motion of the sensing cam 203 inside the limit switch through the transmission shaft 201. The single-pole micro-mechanical switch 32 is triggered by the rotation of the sensing cam 203 to realize the conversion of the electrical signal.

[0042] According to the principle of coaxial technology, it is ensured that the limit switch and the device under test have a synchronous rotation angle.

[0043] Example 2: Please refer to Figure 4-6 The present invention provides a technical solution: a modular mechanical limit switch, comprising: a switch body, the difference between this embodiment and the first embodiment is that a double-pole switch module group 10 is provided in the switch body

[0044] The double-pole switch module set 10 mainly includes a double-pole micromechanical switch 101, a cable 104, a second wiring terminal 102, a bottom plate 105, a reserved terminal 103, a pad 106, etc.;

[0045] The bottom plate 105 is symmetrically provided with second wiring terminals 102, and reserved wiring posts 103 are provided between the second wiring terminals 102. The bottom plate 105 is also stacked with spacers 106 and double-pole micro-mechanical switches 101, and the cable 104 is connected to the double-pole micro-mechanical switches 101.

[0046] The double-pole micromechanical switch 101 mainly includes a trigger button 1011, pins 1012, a second module housing 1013 and a fixing hole 1014. A plurality of pairs of pins 1012 are symmetrically arranged on both sides of the second module housing 1013. A trigger button 1011 is arranged on one side of the second module housing 1013. The trigger button 1011 and the induction cam 203 are inductively triggered to realize the conversion of electrical signals.

[0047] The second wiring terminal 102 is connected to the user monitoring cable 104 to output the position signal as an electrical signal, thereby realizing remote observation of the valve pipeline opening and closing status.

[0048] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular mechanical limit switch, comprising: The switch body is characterized in that a single-pole switch module group (3) or a double-pole switch module group (10) is arranged inside the switch body; The switch body is mainly composed of an upper cover (1), a sensing cam assembly (2), a shaft sleeve (4), a first sealing ring (5), a base (6), a transparent cover (7), an on-site indicator (8) and a lower retaining spring (9); The induction cam group (2) is inductively triggered by the single-pole switch module group (3) or the double-pole switch module group (10); The sensing cam assembly (2) comprises a transmission shaft (201), four positioning gears (202) are fixedly mounted on the transmission shaft (201), sensing cams (203) are arranged outside the positioning gears (202), and wave springs (207) are arranged between the two upper sensing cams (203) and between the two lower sensing cams (203); The upper cover (1) and the base (6) are mechanically connected to the outside via the induction cam assembly (2); The on-site indicator (8) is fixed to the transmission shaft (201) via a lower retaining spring (9) and rotates synchronously with the transmission shaft (201).

2. A modular mechanical limit switch according to claim 1, characterized in that: The single-pole switch module group (3) mainly comprises a first module housing (31), a single-pole micro-mechanical switch (32), and a first wiring terminal (33).

3. A modular mechanical limit switch according to claim 2, characterized in that: The first module housing (31) is filled with epoxy resin glue, a first wiring terminal (33) is installed on a side surface of the first module housing (31), and a single-pole micro-mechanical switch (32) is provided in the first module housing (31).

4. A modular mechanical limit switch according to claim 1, characterized in that: A plurality of second sealing rings (204) are sleeved on the lower part of the transmission shaft (201), an upper retaining spring (205) is sleeved on the lower end of the transmission shaft (201), and the transmission shaft (201) is fixed to the base (6) via the upper retaining spring (205), the shaft sleeve (4) and the middle retaining spring.

5. A modular mechanical limit switch according to claim 1, characterized in that: The double-pole switch module group (10) mainly comprises a double-pole micromechanical switch (101), a cable (104), a second wiring terminal (102), a bottom plate (105), a reserved wiring post (103), and a cushion block (106).

6. A modular mechanical limit switch according to claim 5, characterized in that: The bottom plate (105) is symmetrically provided with second wiring terminals (102), reserved wiring posts (103) are provided between the second wiring terminals (102), and pads (106) and double-pole micro-mechanical switches (101) are also stacked at intervals on the bottom plate (105), and the cable (104) connects the double-pole micro-mechanical switch (101) and the second wiring terminals (102).

7. A modular mechanical limit switch according to claim 5, characterized in that: The double-pole micromechanical switch (101) mainly comprises a trigger button (1011), pins (1012), a second module housing (1013) and a fixing hole (1014); a plurality of pairs of pins (1012) are symmetrically provided on both sides of the second module housing (1013); a trigger button (1011) is provided on one side of the second module housing (1013); and the trigger button (1011) is inductively triggered by the inductive cam (203).

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