CN105719901B - A kind of dish shrapnel auto-pressure switch - Google Patents

Abstract

An automatic pressure switch of a disc shrapnel, including a connecting body, a disc shrapnel, a switch base, a wiring frame, a disc shrapnel spring, a lower seat of a disc shrapnel spring, a pressure spring, and a differential pressure spring, and is characterized in that the upper part of the disc shrapnel spring The end face is provided with a disc shrapnel and the protruding part of the disc shrapnel is downward, and is arranged on the end face of the upper part of the disc shrapnel spring, and the lower part of the disc shrapnel spring is provided with a disc shrapnel spring lower seat. There is a pressure spring in the switch base, one end is placed above the lower seat of the disc shrapnel spring, the other end is a pressure adjustment nut, the pressure difference spring is set in the wiring frame, the upper part is a pressure difference adjustment nut, and the lower part is pressed on the pressure difference thimble , the lower part of the differential pressure thimble is placed above the concave surface of the dish-shaped shrapnel, and does not touch the concave surface. When used in combination with the above components, the present invention can produce various types of automatic pressure switches with low manufacturing cost.

Description

A disc-shaped shrapnel automatic pressure switch

technical field

The invention relates to a pressure switch, in particular to an automatic pressure switch of disc-shaped shrapnel.

Background technique

The existing automatic pressure switch with dish-shaped shrapnel relies on pressure to push the dish-shaped shrapnel. When the dish-shaped shrapnel is under a certain pressure, the convex surface is concave and deformed to push the thimble, and the thimble pushes away the shrapnel to disconnect the contact point, and the switch is turned off; the pressure disappears or When it is reduced to a certain value, the protruding surface of the dish-shaped shrapnel returns to its position, and the shrapnel pushes the thimble back to restore, thereby driving the contact point to return, and the switch is closed. Its shortcoming is: when producing disc-shaped shrapnel, its thickness and the height of the convex surface determine the size of the pressure and pressure difference. After the product is finalized, it cannot be adjusted again. The contact points are prone to sparks, poor contact, and the disconnection distance is not enough, which cannot meet the requirements for adjusting pressure and pressure difference in large and medium-sized pressure switches. Tens of thousands of times will affect the stability and service life of the switch. Due to the need to adjust the pressure difference, the existing large and medium-sized switches have a service life of 200,000 times, so multiple sets of springs and metal parts are required to cooperate, which is very heavy and has high manufacturing costs.

Contents of the invention

The object of the present invention is to overcome the above disadvantages, and provide a dish-shaped shrapnel automatic pressure switch that meets the requirements of various large and medium-sized automatic pressure switches, has strong practicability, simple structure, and low manufacturing cost.

The purpose of the present invention is achieved like this:

An automatic pressure switch for disc shrapnel, including connecting body, disc shrapnel, switch base, switch housing, wiring frame, disc shrapnel spring, disc shrapnel spring seat, thimble, copper shrapnel, silver point, wiring piece, pressure switch Spring, differential pressure spring, characterized in that the base of the switch is provided with a disc spring, the upper end of the disc spring is provided with a disc and the protruding part of the disc is downward, and the lower part of the disc spring is provided with a disc The spring lower seat is provided with a pressure spring in the switch base, one end is placed above the disc spring lower seat, and the other end is a pressure adjustment nut. The pressure difference spring is set in the wiring frame. The upper part of the differential pressure thimble and the lower part of the differential pressure thimble are placed above the concave surface of the dish-shaped shrapnel and do not touch the concave surface.

Because the present invention adopts the improvement of the above structure, when in use, the pressure entering from the connecting body pushes the lower seat of the disc-shaped shrapnel spring to move upward. The disc springs are compressed. When compressed to the elastic force, the disc-shaped shrapnel can be moved from the convex to the concave surface, the concave surface pushes the thimble, the thimble pushes up the copper shrapnel, and the copper shrapnel drives the silver point to cut off the power. At this time, the external pressure stops, and the dish-shaped shrapnel is not pushed from the convex to the concave surface. Desired distance for quick deformation, silver point fire. When the external pressure stops, the disc shrapnel spring uses its own elastic force to quickly deform the convex surface of the disc shrapnel to the concave surface completely. Push up the thimble, and the thimble pushes up the copper shrapnel. The copper shrapnel drives the silver point to fully open and power off. When the external pressure gradually decreases, the lower seat of the disc-shaped shrapnel spring moves downward, and the disc-shaped shrapnel spring stretches. When the required force is applied, the concave surface quickly bounces to the convex surface. At this time, the elastic force of the copper shrapnel pushes down the thimble, and at the same time drives the silver point to close, and the switch is energized. By adjusting the elastic coefficient of the pressure spring, the pressure of the pressure spring on the lower seat of the disc shrapnel spring can be adjusted, thereby adjusting the pressure of the switch when it is working. Adjusting the elastic coefficient of the pressure difference spring can change the pressure on the pressure difference thimble, and also change the force of the pressure difference thimble to bounce back against the concave surface of the disc-shaped shrapnel, thereby adjusting the pressure difference when the switch is working. Disc-shaped shrapnel, disc-shaped shrapnel spring, disc-shaped shrapnel spring seat, pressure spring, and differential pressure spring are required to be used together. The invention can meet the requirements of various large, medium and small automatic pressure switches, and has strong practicability and low manufacturing cost. .

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention:

Fig. 2 is the A-A sectional view of Fig. 1:

Fig. 3 is the simple structure schematic diagram of the present invention implementation:

Fig. 4 is a structural schematic diagram of the existing disc shrapnel automatic pressure switch:

Detailed ways:

The present invention is described in detail in conjunction with accompanying drawing now.

As shown in Figure 1 and Figure 3, a disc-shaped shrapnel automatic pressure switch.

Including: connecting body 1, sealing piece 2, pressure plate 3, disc shrapnel spring lower seat 4, disc shrapnel spring 6, disc shrapnel spring upper seat 7, upper seat cover 8, disc shrapnel 9, thimble 10, pressure spring 5 , differential pressure spring 29, pressure bolt 12, differential pressure bolt 30, lug 13, lug frame 17, switch case 14, switch pressure plate 16, switch button 15, single arm 18, copper shrapnel 11, silver point 20, exhaust Depression bar 21, pressure bar spring 22, line clamp 23, line clamp nut 24, switch base 25, exhaust valve 27, exhaust needle 26, differential pressure thimble 28, single arm pin 19.

The switch base 25 is fixed to the connecting body 1, the pressing plate 3 and the sealing sheet 2 are fixed in the connecting body 1, the lower seat 4 of the disc shrapnel spring is arranged in the switch base 25 and the lower end face is placed on the connecting body 1, the upper end face. The upper end face is pressed by disc spring 6 and compression spring 5 . The disc shrapnel spring 6 is placed in the switch base 25, the lower end is placed at the upper end of the disc spring lower seat 4, the upper end is placed at the lower end of the disc spring upper seat 7, the disc shrapnel 9 is placed in the switch base 25, and the lower end protrudes from the surface. Place on the upper end face of the disc spring upper seat 7. Last seat cover 8 places switch base 25, and last seat cover 8 inner diameters and disc shrapnel spring upper seat 7 outer diameters move fit. The thimble 10 is placed in the switch base 25, the upper and lower ends are not in contact with the concave surface of the copper shrapnel 11 and the disc shrapnel 9, one end of the copper shrapnel 11 is connected to the silver point 20 and the other end is connected to the lug 13, and the lug 13 is fixed on the lug frame 17 , the lug frame 17 is fixed on the switch base 25, the lower end of the pressure spring 5 is placed on the upper end of the disc spring lower seat 4, the upper end is placed on the lower end of the pressure bolt 12, the differential pressure spring 29 is placed in the wiring frame 17, and the upper end is placed The lower end surface of the differential pressure bolt 30 is placed above the differential pressure thimble 28, and the lower end of the differential pressure thimble 28 is placed above the concave surface of the dish-shaped shrapnel, but does not contact the concave surface. When the convex surface of the dish-shaped shrapnel quickly deforms to the concave surface, it touches the pressure difference thimble 28, and the lower end surface adjusts the elastic coefficient of the pressure difference spring 29 to adjust the pressure of the pressure difference spring 29 on the pressure difference thimble 28, thereby achieving the purpose of adjusting the pressure difference . The single arm 18 is placed on the switch base 25, and is connected with the single arm pin 19 for moving fit. One end of the single arm 18 is placed on the upper end of the thimble 10, and the other end is placed on the upper surface of the exhaust pressure rod 21. When the thimble 10 is pushed upward, the other end of the single arm 18 compresses the exhaust pressure rod 21, and the single arm 18 is returned by the pressure rod spring. 22 jack up and return to the original position. The exhaust pressure rod 21 is placed in the switch base 25, the upper end surface is placed on the single arm 18, the lower end surface is placed on the upper end surface of the exhaust needle 26, but when the exhaust is not in contact with the exhaust, the exhaust needle 26 is pressed downward to achieve exhaust. The switch pressing plate 16 is placed in the wiring frame 17, and the upper end surface is placed on the switch button 15, but not in contact. The lower end face is placed on the single arm 18, when the switch button is pressed down, it contacts the switch pressure plate 16 and presses down to push one end of the single arm 18 to move downward, pushing the exhaust pressure rod 21, and the exhaust pressure rod 21 pushes the exhaust needle 26, the switch Exhaust, one end of the single arm 18 moves downward to exhaust, the other end lifts up to push up the copper shrapnel, the switch is powered off, the switch housing 14 is fixed on the switch base 25, the switch button 15 is dynamically matched and connected in the switch housing 14, and the switch A cable clamp nut 24 and a cable clamp 23 are arranged under the base 25 .

Claims (2)

1. a kind of dish shrapnel auto-pressure switch, including：Connector (1), switch housing (14), wiring frame (17), switch Pedestal (25), dish-shaped shrapnel (9), dish-shaped shrapnel spring (6), dish-shaped shrapnel spring lower seat (4), compression spring (5), pressure spring (29), pressure difference thimble (28), it is characterized in that dish-shaped shrapnel spring (6) is had in switch pedestal (25), in dish-shaped shrapnel spring (6) upper surface is equipped with dish-shaped shrapnel (9), and dish-shaped shrapnel (9) protrusion downwards, and is arranged in dish-shaped shrapnel spring (6) upper end On face, dish-shaped shrapnel spring (6) lower face is equipped with dish-shaped shrapnel spring lower seat (4), and dish-shaped shrapnel spring lower seat (4) lower face is set It sets in connector upper surface.

2. dish shrapnel auto-pressure switch as described in claim 1, it is characterized in that being equipped with pressure bullet in switch pedestal (25) Spring (5), upper end are equipped with compression bolts (12), and compression spring (5) upper end is placed on dish-shaped shrapnel spring lower seat (4) upper surface, press Poor spring (29) is arranged in wiring frame (17), and upper end is equipped with pressure difference nut (30), and lower end is pressed in pressure difference thimble (28) upper end Face, pressure difference thimble (28) lower face is placed in above dish-shaped shrapnel (9) concave surface, not in contact with concave surface.