CN206772584U - A kind of Weight detector of gas spring - Google Patents

Abstract

The utility model provides a load detection device for an air spring, which belongs to the technical field of detection equipment. The utility model solves the technical problems such as the inconvenient use of the load detecting device of the existing gas spring. The detection device includes a base and a test platform arranged on the base. The test platform has a support disc arranged horizontally. The upper surface of the support disc is flat and the upper surface of the support disc is provided with a pressure sensor; the base is fixed with a connecting bracket. , a cylinder is fixedly connected to the connecting bracket, the cylinder is located directly above the supporting disc, and the piston rod of the cylinder is arranged vertically downward; the piston rod of the cylinder is fixedly provided with a limit cylinder. The detection device in the utility model is easy to use, and the test is convenient and reliable, and the test value obtained by using the pressure sensor is convenient and accurate to read.

Description

A load detection device for a gas spring

technical field

The utility model belongs to the technical field of detection equipment and relates to a load detection device of a gas spring.

Background technique

Gas spring is an industrial accessory that can perform functions such as support, buffer, brake, height adjustment and angle adjustment. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filler, in-cylinder control components and external control components, and joints. The principle is to fill the closed pressure cylinder with an inert gas or an oil-gas mixture, so that the pressure in the cavity is several times or dozens of times higher than the atmospheric pressure, and the pressure difference generated by the cross-sectional area of the piston rod is smaller than that of the piston. To realize the movement of the piston rod. Due to the fundamental difference in principle, gas springs have significant advantages over ordinary springs: relatively slow speed, little change in dynamic force, and easy control. Gas springs are widely used. For example, they are used in automobiles to drive the suspension and closing of the rear doors of automobiles. In order to ensure the safety and reliability of gas springs during use, it is necessary to test the load capacity of gas springs of corresponding specifications.

Chinese patent (notification number: CN204085617U, publication date: 2015-01-07) discloses a system for testing the size and change of air spring volume, including a test bench and a water supply system; the test bench is a tensile and compression testing machine, including Frame, the loading beam arranged on the frame and the control mechanism that controls the loading beam to slide up and down along the frame, the loading beam is provided with an upper chuck, the frame is provided with a lower chuck opposite to the upper chuck, and the loading beam is mounted on the A displacement sensor and a first pressure sensor are provided, connecting seats are respectively connected to the upper chuck and the lower chuck, the air spring is fixed between the connecting seats on the upper chuck and the lower chuck, and the rubber airbag of the air spring is provided with an advanced water port; the water supply system includes a water tank, two second pressure sensors, a water pump, a one-way valve, a first electromagnetic valve and a second electromagnetic valve, the inlet of the water pump is connected to the water tank, and the outlet of the water pump passes through the one-way valve, the first electromagnetic The valve is connected to the water inlet of the rubber airbag, the inlet end of the second solenoid valve is connected to the water inlet of the rubber airbag, the outlet end of the second solenoid valve is connected to the water tank, the bottom of the water tank and the water inlet of the rubber airbag are respectively connected to the second sensor, and the bottom of the water tank is connected to the water inlet of the rubber airbag. The second pressure sensor is used to detect the underwater pressure, and the second pressure sensor of the water inlet of the rubber airbag is used for detecting the internal water pressure of the air spring.

The equipment in the above-mentioned patent documents has a complex structure, a large floor space, and high manufacturing costs, and it is not convenient to use it to test the load force of the gas spring.

Contents of the invention

The purpose of this utility model is to solve the above problems in the existing technology, and propose a load detection device for gas springs. The technical problem to be solved by this utility model is: how to conveniently test the load force of the gas spring and ensure the accuracy of the test sex.

The purpose of this utility model can be achieved through the following technical solutions:

A load detection device for a gas spring, comprising a base and a test platform arranged on the base, characterized in that the test platform has a horizontally arranged support disk, the upper surface of the support disk is flat and the support circle A pressure sensor is provided on the upper surface of the disc; a connection bracket is fixed on the base, and a cylinder is fixedly connected to the connection bracket, and the cylinder is located directly above the support disc, and the piston rod of the cylinder is vertical Set downward; the piston rod of the cylinder is fixed with a limit cylinder.

The principle is as follows: when in use, the cylinder body of the gas spring pressure cylinder is inserted into the limit cylinder, one end of the pressure cylinder is against the outer end of the piston rod of the cylinder, and the piston rod of the gas spring is released from the other end of the pressure cylinder. Stretch out, the force of the piston rod of the gas spring can be transmitted to the pressure sensor on the support disc. During the test, the cylinder moves, and the piston rod of the cylinder pushes the cylinder body of the gas spring to move relative to the piston rod, moving slowly to the maximum stroke place, and keep it for 40S, read the pressure value of the pressure sensor, so as to measure the load value of the gas spring. The device is easy to use, convenient and reliable to test, and the test value obtained by using the pressure sensor is convenient and accurate to read.

In the above gas spring load detection device, a stressed disc is arranged above the supporting disc, the pressure sensor is located between the supporting disc and the stressed disc, and the stressed disc is located between the supported disc and the stressed disc. The lower surface of the force puck bears against the pressure sensor. The piston rod of the gas spring transmits the bearing force to the force disc, and then to the pressure sensor. The force disc has a larger area, which can overcome the position error between the gas spring and the pressure sensor. The test on the pressure sensor The load value of the gas spring can be obtained by subtracting the gravity of the stressed disc from the numerical value, which is convenient and reliable.

In the above-mentioned gas spring load detection device, the diameter of the supporting disc is equal to the diameter of the stressed disc and they are coaxially arranged, and there are several pressure sensors along the supporting circle. The discs are evenly spaced around the circumference. In this way, it is convenient to use the pressure sensor to support the stressed disc, which ensures the stability and reliability of the stressed disc. Add up the test values of all pressure sensors and subtract the gravity of the stressed disc to finally get the load value of the gas spring pressure.

In the above gas spring load detection device, the deformation piece of the pressure sensor is in the shape of a disk.

As an alternative, the technical solution can also use the pressure sensor in the Chinese patent "A Pressure Sensor" (Notice No.: CN202676329U, Publication Date: 2013-01-16).

In the above gas spring load detection device, the end of the piston rod of the cylinder is fixed with an abutment block, the abutment block is disc-shaped and the end surface of the abutment block is a smooth flat surface, so One end of the limiting cylinder is fixedly connected to the circumferential surface of the abutting block. In this way, the gas spring can be limited to prevent it from tilting or shifting, and at the same time, force can be applied to it conveniently.

Compared with the prior art, the test device in the utility model is simple to use, convenient and reliable to test, and the test value obtained by using the pressure sensor is convenient and accurate to read.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the detection device.

Fig. 2 is a schematic diagram of the internal structure of the detection device in the first embodiment.

Fig. 3 is a schematic diagram of the internal structure of the detection device in the second embodiment.

In the figure, 1. base; 2. test platform; 3. support disc; 4. pressure sensor; 5. connecting bracket; 6. cylinder; 7. limit cylinder; 8. force disc; 9. abutment Piece.

detailed description

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

Embodiment one

As shown in Figure 1 and Figure 2, the load detection device of the gas spring includes a base 1 and a test platform 2 arranged on the base 1. There is a support disc 3 arranged horizontally on the test platform 2, and the upper surface of the support disc 3 is flat. And the upper surface of the supporting disc 3 is provided with a pressure sensor 4; the base 1 is fixedly provided with a connecting bracket 5, and the connecting bracket 5 is fixedly connected with a cylinder 6, the cylinder 6 is located directly above the supporting disc 3, and the piston rod of the cylinder 6 Set vertically downward; the piston rod of the cylinder 6 is fixed with a limit cylinder 7, and the end of the piston rod of the cylinder 6 is fixed with an abutment block 9, which is disc-shaped and abuts against the end of the block 9. The end surface is a smooth flat surface, and one end of the limit cylinder 7 is fixedly connected to the circumferential surface of the abutment block 9 . When in use, the cylinder body of the gas spring pressure cylinder is inserted into the limit cylinder 7, and the limit cylinder 7 can limit the gas spring to prevent it from tilting or shifting; one end of the pressure cylinder and the abutting block 9 The piston rod of the gas spring protrudes from the other end of the pressure cylinder, and the force of the piston rod of the gas spring can be transmitted to the pressure sensor 4 on the support disc 3. During the test, Cylinder 6 moves, the piston rod of cylinder 6 pushes the cylinder body of the gas spring to move relative to the piston rod, moves slowly to the maximum stroke, and keeps it for 40 seconds, reads the pressure value of the pressure sensor 4, thereby measuring the load value of the gas spring; The device is easy to use, and the test is convenient and reliable, and the test value obtained by using the pressure sensor 4 is convenient and accurate to read.

As shown in Figure 2, a stressed disc 8 is also provided above the supporting disc 3, the pressure sensor 4 is located between the supporting disc 3 and the stressed disc 8, and the lower surface of the stressed disc 8 leans against the On the pressure sensor 4; specifically, the diameter of the supporting disc 3 is equal to the diameter of the stressed disc 8 and the two are coaxially arranged, and there are several pressure sensors 4 that are evenly spaced along the circumferential direction of the supporting disc 3 . The piston rod of the gas spring transmits the bearing force to the stressed disc 8 and then to the pressure sensor 4. The stressed disc 8 has a larger area and can overcome the position error between the gas spring and the pressure sensor 4. The load value of the gas spring can be obtained by subtracting the gravity of the stressed disc 8 from the value tested on the pressure sensor 4, which is convenient and reliable; multiple pressure sensors 4 are used to support the stressed disc 8 to ensure the stability and reliability of the stressed disc 8 In order to obtain the load value pressure of the gas spring, add up the test values of all the pressure sensors 4 and subtract the gravity of the stressed disk 8.

Embodiment two

As shown in Figure 3, this embodiment is roughly the same as Embodiment 1, the difference is that there is only one pressure sensor 4 in this embodiment, and the deformation piece of the pressure sensor 4 is disc-shaped, through which the disc-shaped The deformation sheet supports the stressed disk 8.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses 1. Base; 2. Test platform; 3. Support disc; 4. Pressure sensor; 5. Connecting bracket; 6. Cylinder; 7. Limiting cylinder; 8. Forced disc; 9. Terms such as leaning against blocks, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (5)

1. a kind of Weight detector of gas spring, including base (1) and the test platform (2) that is arranged on base (1), it is special Sign is, has horizontally disposed support disk (3) on the test platform (2), described support disk (3) upper surface it is smooth and The upper surface of the support disk (3) is provided with pressure sensor (4)；Connecting bracket (5) is installed with the base (1), it is described Cylinder (6) is fixed with connecting bracket (5), the cylinder (6) is positioned at the surface of the support disk (3), the cylinder (6) Piston rod set downwards；Limiting cylinder (7) is installed with the piston rod of the cylinder (6).

2. the Weight detector of gas spring according to claim 1, it is characterised in that described to support the upper of disk (3) Side is additionally provided with stress disk (8), and the pressure sensor (4) is positioned at it of the support disk (3) and the stress disk (8) Between, the lower surface of the stress disk (8) is resisted against on the pressure sensor (4).

3. the Weight detector of gas spring according to claim 2, it is characterised in that described to support the straight of disk (3) Footpath is equal with the diameter of the stress disk (8) and both are coaxially disposed, the quantity of the pressure sensor (4) have several and Along the circumferential uniform intervals distribution of the support disk (3).

4. the Weight detector of gas spring according to claim 1 or 2, it is characterised in that the pressure sensor (4) Deformation piece be disk sheet.

5. the Weight detector of the gas spring according to claim 1 or 2 or 3, it is characterised in that the cylinder (6) The end of piston rod is installed with against block (9), and the end face against block (9) in the form of annular discs against block (9) is smooth Burnishing surface, one end of the limiting cylinder (7) are connected in described against on the periphery of block (9).