TWI587345B - A pressure switch structure - Google Patents

Description

Pressure switch structure

A pressure switch structure of the present invention achieves the function of a pressure switch structure by modifying a series of disc springs in series to form a desired spring force.

The pressure switch is a component that senses the pressure. When the pressure reaches the set value, it is returned to the system. As the basis for the system research, the reliability must be high. The main principle is that the pressure pushes the piston and moves the spring. When the pressure reaches the set value, the switch at the rear end of the spring is touched, so that the switch that was originally disconnected becomes a passage, and the system pressure is notified that the pressure has reached the set value.

At present, the pressure switch is mostly composed of a coil spring, which is large in size and heavy in weight, which is not conducive to the use of the aerospace industry. In addition, although its axial force has a spring force to cushion, its radial vibration resistance is Poor, if this can be improved, it will be applicable to high vibration equipment environments.

In view of the above problems, a pressure switch structure of the present invention has a large rigidity by a characteristic of a disc spring, a strong shock absorbing capability, and can withstand large loads with a small deformation, and is particularly suitable for a small axial space requirement and requires a large load. Occasionally, it can replace the shortcomings of traditional spiral springs, such as limited space and load, and excessive compression stroke, and can improve the performance of the machine.

The invention combines four disc springs in series to form a required spring force, and one spring retainer is placed between the two disc springs to ensure smooth contact surface, and the piston and the guide rod are screwed together, and the spring group inner hole Passing through the guide rod, being restricted to axial movement, the pre-force screw fixing one end of the spring set to On the body, a certain pre-force is applied to shorten the movement of the guide rod to reduce the volume, and a set of micro-switches is connected to the rear end.

The action flow is as follows. The fluid enters from the inlet, and the piston and the guide rod are pushed by the pressure. The force of the conduction first overcomes the pre-force set, and then moves by the guide rod. After a certain stroke, the micro switch of the rear end is touched. Turn the switch that was originally open to a path, telling the system that the pressure has reached the set value.

This Summary and the following detailed description and the accompanying drawings are intended to further illustrate the manner, the Other objects and advantages of the present invention will be described in the following description and drawings.

1‧‧‧ Ontology

2‧‧‧elastic unit

21‧‧‧ Spring holder

3‧‧‧Micro-motion unit

4‧‧‧Restriction unit

41‧‧‧Piston

42‧‧‧guides

43‧‧‧Pre-spiral

Fig. 1 is a structural view showing a structure of a pressure switch of the present invention.

The embodiments of the present invention are described by way of specific examples, and those skilled in the art can understand the other advantages and effects of the present invention as disclosed in the specification.

Please refer to FIG. 1 , which is a pressure switch structure according to the present invention. The structure includes: a body 1 having a circular tube body; and an elastic unit 2 disposed in the body 1 for sensing The pressure of the fluid causes the displacement of the piston 41 in the limiting unit 4 to trigger the micro-motion unit 3, which includes a plurality of disc springs connected in series to form a required spring force, and a spring is placed between the two disc springs. 21 to ensure that the contact surface is smooth; a micro-motion unit 3 is disposed in the Behind the elastic unit 2, one end of the elastic unit 2 is in contact with the elastic unit 2, and the other end is fixed in the body 1 by a colloid; a limiting unit 4 includes a piston 41 and a guiding rod 42 disposed in front of the elastic unit 2, and an inner hole of the elastic unit 2 Through the guide rod 42, the elastic unit 2 is restricted from moving in the axial direction, and one end of the elastic unit 2 is fixed on the body 1, and a certain pre-force spiral 43 is applied, which can effectively shorten the movement stroke of the guide rod 42 and reduce the volume, the piston 41 and the guide rod 42 are screwed together to form a force transmission, and the axial movement of the piston 41 in the body 1 is naturally formed, and the guide rod 42 is naturally moved to the upper dead point, that is, the lowest fixed position of the micro-motion unit 3, The micro-motion unit 3 is prevented from being damaged by the guide rod 42. The main task of the pressure switch is to determine whether the system pressure reaches the set value. When the pressure increases, the piston 41 moves toward the elastic unit 2 due to the hydraulic pressure, and the higher the pressure, the elastic element 2 The greater the compression amount, the farther the piston 41 moves relative to each other. When the piston 41 moves to the mounting position of the micro-motion unit 3, the telecommunication signal outputted by the component is switched to achieve the purpose of the pressure switch.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, it is to be understood that equivalents or modifications may be made without departing from the spirit and scope of the invention. Equivalent changes and modifications made below are intended to be included within the scope of the invention.

1‧‧‧ Ontology

2‧‧‧elastic unit

21‧‧‧ Spring holder

3‧‧‧Micro-motion unit

4‧‧‧Restriction unit

41‧‧‧Piston

42‧‧‧guides

43‧‧‧Pre-spiral

Claims (1)

A pressure switch structure, the structure comprising: a body having a circular tube body; an elastic unit disposed in the body for sensing the pressure of the fluid, such that the displacement of the piston in the limiting unit triggers a micro-motion unit comprising a plurality of disc springs connected in series to form a required spring force, wherein a plurality of spring retainers are placed between the two disc springs to ensure a smooth contact surface; a micro-motion unit The elastic unit is disposed at the rear of the elastic unit, and one end of the elastic unit is fixed in the body; a limiting unit includes a piston and a guiding rod disposed in front of the elastic unit, and the inner hole of the elastic unit passes through the guiding rod, so that the elastic unit is restricted In the axial movement, one end of the elastic unit is fixed on the body, and a certain pre-force spiral is applied, which can effectively shorten the movement stroke of the guide rod and reduce the volume, and the piston and the guide rod are locked by the screw to form a force transmission, and the piston is in the present. The axial movement gap in the body naturally forms the dead point above the guide rod movement, which is the lowest fixed position of the micro-motion unit, so as to prevent the micro-motion unit from being damaged by the guide rod. The main task of the switch is to determine whether the system pressure reaches the set value. When the pressure increases, the piston moves toward the elastic unit side due to the hydraulic pressure. The higher the pressure, the larger the compression amount of the elastic element, the farther the piston moves relative to the piston when the piston moves. When the stroke reaches the installation position of the micro-motion unit, the telecommunication signal outputted by the component is switched to achieve the purpose of the pressure switch.