Spoke pressure sensor capable of preventing impact force damage

Abstract

The utility model discloses a spoke pressure sensor capable of preventing impact force damage. The spoke pressure sensor comprises a spoke pressure sensor and a hysteresis buffer mechanism, the hysteresis buffering mechanism comprises a buffering sleeve, a threaded connecting rod, a sleeve sealing cover, a rubber sealing plug, a first piston rod, a first piston head and a load transmission disc, the first piston rod and the first piston head are inserted into a first buffering cavity of the buffering sleeve, a positioning piston rod is fixed to the center of the bottom of the buffering sleeve, and a second piston head is fixed to the positioning piston rod; the first piston rod is provided with a second buffer cavity, and the second piston head and the positioning piston rod are inserted into the second buffer cavity. The pressure sensor has good impact force resistance, impact of instantaneous impact force is converted into heat energy for dissipation through the hysteresis buffer mechanism, the elastic deformation capacity of the spoke of the pressure sensor is prevented from being damaged by the instantaneous impact force, accumulative effect damage caused by plastic deformation of the spoke is prevented, and the measurement precision of the sensor is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to a spoke pressure sensor capable of preventing damage by impact force. Background Art

[0002] Pressure sensors are used to measure pressure or tension. They are devices or apparatuses that can sense pressure signals and convert them into usable output electrical signals according to certain rules. Pressure sensors are usually composed of pressure sensitive elements and signal processing units. They are widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electricity, ships, machine tools, pipelines and many other industries.

[0003] The spoke pressure sensor is a type of pressure sensor. Because of its round shape, similar to a wheel, we call it a spoke sensor. Due to its strong stability and high precision, it is also called a cylindrical force sensor. It has outstanding advantages such as low height, high precision, good linearity, and resistance to deflection loads and lateral forces. It can be used to measure tension and thrust, and is particularly suitable for weighing and force measurement. The spoke pressure sensor uses the spoke as an elastic element. When the axial force acts on the spoke, the spoke deforms and generates strain. The value of the axial force is obtained by measuring the strain.

[0004] The spoke pressure sensor has the advantages of fast response speed, short hysteresis time and high accuracy when detecting tension and pressure. This is because the spokes of the spoke pressure sensor are linearly deformed after being stressed. These linear deformations are elastic deformations. The spokes of the spoke pressure sensor will undergo plastic deformation under the action of impact loads, especially when the impact load is greater than the sensor's own range. These plastic deformations will cause the deformation recovery ability of the spokes to decrease under the long-term accumulation effect, which will lead to a serious decrease in the accuracy of the pressure sensor. How to improve the impact resistance of the spoke pressure sensor and increase the hysteresis ability of the spoke pressure under the action of impact force has become a technical problem that urgently needs to be solved. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a spoke pressure sensor that can prevent damage by impact force. The pressure sensor has good impact resistance, and converts the impact of instantaneous impact force into heat energy for dissipation through a hysteresis buffer mechanism, thereby preventing instantaneous impact force from destroying the elastic deformation capacity of the spokes of the pressure sensor, preventing the cumulative effect of the plastic deformation of the spokes from destroying, and maintaining the measurement accuracy of the sensor; the hysteresis buffer mechanism of the pressure sensor converts the dynamic load of the detection target into a static load through the hysteresis effect and will not affect the transmission effect of the static load, thereby maintaining the accuracy of the final measurement result. The structure and working principle of the hysteresis buffer mechanism are simple, and can keep the load transmitted in the direction of the central axis of the spoke pressure sensor, thereby ensuring the measurement accuracy of the sensor.

[0006] In order to achieve the above technical effects, the utility model is implemented through the following technical solutions:

[0007] A wheel spoke pressure sensor capable of preventing damage by impact force comprises a wheel spoke pressure sensor and a hysteresis buffer mechanism, wherein the hysteresis buffer mechanism is detachably fixed to the wheel spoke pressure sensor; the hysteresis buffer mechanism comprises a buffer sleeve, a threaded connecting rod, a sleeve sealing cover, a rubber sealing plug, a first piston rod, a first piston head and a load transfer disk, wherein the first piston head is fixed to the front end of the first piston rod, the load transfer disk is fixed to the rear end of the first piston rod, the first piston rod and the first piston head are inserted into the first buffer cavity of the buffer sleeve, the rubber sealing plug is fixed to the sleeve sealing cover, and the rubber sealing plug is fixed to the sleeve sealing cover. A sealing hole for the first piston rod to pass through is opened at the center of the plug, the sleeve sealing cover is fixed on the top of the buffer sleeve, the threaded connecting rod is fixed on the bottom of the buffer sleeve, a positioning piston rod is fixed at the bottom center of the buffer sleeve, a second piston head is fixed on the positioning piston rod, a second buffer cavity is opened at the rear end center of the first piston rod toward the front end direction, the second piston head and the positioning piston rod are inserted into the second buffer cavity of the first piston rod, flow holes are evenly distributed on the outer circumference of the first piston head and the second piston head, and the first buffer cavity and the second buffer cavity are filled with viscous fluid.

[0008] Furthermore, the hysteresis buffer mechanism is threadedly connected to the force-bearing hole at the center of the spoke pressure sensor through a threaded connecting rod.

[0009] Furthermore, a reinforcing haunch plate is welded between the load transfer disc and the first piston rod, and a bolt connection hole is opened on the load transfer disc.

[0010] Furthermore, the buffer sleeve is fixedly connected to the threaded connecting rod via an arc-shaped transition connecting portion.

[0011] The beneficial effects of the utility model are as follows: the pressure sensor has good impact resistance, and converts the impact of instantaneous impact force into heat energy for dissipation through the hysteresis buffer mechanism, thereby preventing the instantaneous impact force from destroying the elastic deformation capacity of the spokes of the pressure sensor, preventing the cumulative effect of the plastic deformation of the spokes from destroying the spokes, and maintaining the measurement accuracy of the sensor; the hysteresis buffer mechanism of the pressure sensor converts the dynamic load of the detection target into a static load through the hysteresis effect and will not affect the transmission effect of the static load, thereby maintaining the accuracy of the final measurement result; the structure and working principle of the hysteresis buffer mechanism are simple, and when under tension or compression, it can maintain up and down movement along the direction of the central axis force line to keep the load transmitted toward the central axis direction of the spoke pressure sensor, thereby ensuring the measurement accuracy of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the spoke pressure sensor which can prevent damage by impact force;

[0014] Figure 2 It is a schematic diagram of the composition structure of the hysteresis buffer mechanism;

[0015] Figure 3 It is a schematic diagram of the cross-sectional structure of the hysteresis buffer mechanism.

[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0017] 1-spoke pressure sensor, 2-hysteresis buffer mechanism, 21-buffer sleeve, 22-threaded connecting rod, 23-sleeve sealing cover, 24-rubber sealing plug, 25-first piston rod, 26-load transfer plate, 27-viscous fluid, 211-first buffer chamber, 212-positioning piston rod, 213-second piston head, 251-first piston head, 252-flow hole, 253-second buffer chamber, 261-bolt connection hole, 262-reinforcement axil plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-2As shown, a spoke pressure sensor capable of preventing damage by impact force comprises a spoke pressure sensor and a hysteresis buffer mechanism, wherein the hysteresis buffer mechanism is threadedly connected to the spoke pressure sensor; the hysteresis buffer mechanism 2 comprises a buffer sleeve 21, a threaded connecting rod 22, a sleeve sealing cover 23, a rubber sealing plug 24, a first piston rod 25, a first piston head 251 and a load transfer disk 26, wherein the first piston head 251 is fixed to the front end of the first piston rod 25, the load transfer disk 26 is fixed to the rear end of the first piston rod 25, the first piston rod 25 and the first piston head 251 are inserted into the first buffer cavity 211 of the buffer sleeve 21, the rubber sealing plug 24 is fixed to the sleeve sealing cover 23, a groove is provided on the inner wall of the sleeve sealing cover 23, a protrusion is provided at the center of the rubber sealing plug 24, the protrusion is inserted into the groove, a sealing hole is provided at the center of the rubber sealing plug 24 for the first piston rod 25 to pass through, and the sleeve sealing cover 23 is fixed to the top of the buffer sleeve 21.

[0020] like Figure 3 As shown, the threaded connecting rod 22 is fixed to the bottom of the buffer sleeve 21, and a positioning piston rod 212 is fixed at the bottom center of the buffer sleeve 21. The buffer sleeve 21 is fixedly connected to the threaded connecting rod 22 through an arc-shaped transition connection portion. The arc-shaped transition connection portion can prevent the buffer sleeve 21 from causing stress concentration at the connection point of the threaded connecting rod 22 and causing the threaded connecting rod to break; the positioning piston rod 212 is arranged upward, and a second piston head 213 is fixed on the positioning piston rod 212. A second buffer cavity 253 is opened at the rear end center of the first piston rod 25 toward the front end direction. The second piston head 213 and the positioning piston rod 212 are inserted into the second buffer cavity 253 of the first piston rod. The outer periphery of the first piston head 251 and the second piston head 213 are evenly distributed with flow holes 252, and the first buffer cavity 211 and the second buffer cavity 253 are filled with viscous fluid 27.

[0021] In this embodiment, a reinforcing axil plate 262 is welded between the load transfer disk 26 and the first piston rod 25, and a bolt connection hole 261 is opened on the load transfer disk 26. The reinforcing axil plate 262 can prevent the load transfer disk 26 from shearing and deforming at the connection with the first piston rod 25; the hysteresis buffer mechanism 2 is connected to the component that applies tension or pressure through the load transfer disk 26 and transmits tension or pressure in the direction of the spoke pressure sensor 1.

[0022] In this embodiment, the viscous fluid 27 can be silicone oil.

[0023] The specific working application of the device is as follows: when the impact force formed by the instantaneous tension or pressure acts on the load transfer disk 26, the load transfer disk 26 will drive the first piston rod 25 and the first piston head 251 to slide upward or downward. When the first piston head 251 moves upward or downward, it will compress the space on the opposite side and cause the pressure to increase. The viscous fluid in the first buffer chamber 211 will flow to the side with relatively small pressure through the flow hole 252. Intense friction will be generated between the molecules of the viscous fluid 27 and between the viscous fluid 27 and the first piston head 251. At the same time, huge throttling damping will be generated when the viscous fluid 27 passes through the flow hole 252. The damping force generated by this friction and throttling action converts the impact kinetic energy into heat and dissipates it. In the process of the first piston rod and the first piston head moving upward or downward, the positioning piston rod 212 and the second piston head 213 will also appear accordingly. In response to the sliding, the viscous fluid in the second buffer chamber 253 will also flow from the flow hole to the side with smaller pressure. In the process of the viscous fluid flowing, the kinetic energy of the impact load will be further dissipated, achieving a double dissipation effect. At the same time, the first piston rod 25 slides upward or downward along the positioning piston rod 212 during the movement. The positioning piston rod can prevent the first piston rod 25 from being eccentric during sliding and causing the force line to deflect. The positioning piston rod 212 can ensure the movement of the first piston rod 25 along the direction of the central axis force line and the transmission of force. After the energy dissipation of the impact load is completed, the first piston rod will reach the bottom or top of the buffer sleeve. At this time, the dynamic load is converted into a static load, and the static load will be transmitted to the spoke pressure sensor 1 through the threaded connecting rod 22, thereby preventing the spoke pressure sensor from being plastically deformed under the impact kinetic energy of the impact load and reducing the measurement accuracy.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A spoke pressure sensor capable of preventing damage by impact force, comprising a spoke pressure sensor and a hysteresis buffer mechanism, wherein the hysteresis buffer mechanism is detachably fixed to the spoke pressure sensor; characterized in that: The hysteresis buffer mechanism includes a buffer sleeve, a threaded connecting rod, a sleeve sealing cover, a rubber sealing plug, a first piston rod, a first piston head and a load transfer disk. The first piston head is fixed to the front end of the first piston rod, and the load transfer disk is fixed to the rear end of the first piston rod. The first piston rod and the first piston head are inserted into the first buffer cavity of the buffer sleeve. The rubber sealing plug is fixed on the sleeve sealing cover. A sealing hole for the first piston rod to pass through is opened at the center of the rubber sealing plug. The sleeve sealing cover is fixed to the top of the buffer sleeve. The threaded connecting rod is fixed to the bottom of the buffer sleeve. A positioning piston rod is fixed at the center of the bottom of the buffer sleeve. A second piston head is fixed on the positioning piston rod. A second buffer cavity is opened at the center of the rear end of the first piston rod toward the front end. The second piston head and the positioning piston rod are inserted into the second buffer cavity of the first piston rod. Flow holes are evenly distributed on the outer periphery of the first piston head and the second piston head. The first buffer cavity and the second buffer cavity are filled with viscous fluid.

2. A spoke pressure sensor capable of preventing damage by impact force according to claim 1, characterized in that: The hysteresis buffer mechanism is threadedly connected to the force bearing hole at the center of the spoke pressure sensor through a threaded connecting rod.

3. A spoke pressure sensor capable of preventing damage by impact force according to claim 1 or 2, characterized in that: A reinforcing haunch plate is welded between the load transfer disc and the first piston rod, and a bolt connection hole is opened on the load transfer disc.

4. A spoke pressure sensor capable of preventing damage by impact force according to claim 3, characterized in that: The buffer sleeve is fixedly connected to the threaded connecting rod via an arc-shaped transition connecting portion.

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