CN109029813B - A kind of electric cylinder push-pull force test system and test method based on force component support - Google Patents

Abstract

The invention discloses an electric cylinder push-pull force test system and a test method based on a force component support. The main technical problem to be solved is the problem that it is difficult to measure the push-pull force of a high-power electric cylinder in the prior art. An electric cylinder push-pull force test system based on a force component support, comprising a landing gear, a force component test device, and an electric cylinder, the push rod earring of the electric cylinder is connected to the force component test device, and the force component test device is connected to the force component test device. One end of the landing gear is connected, and one end of the landing gear is pushed and pulled by the electric cylinder. The technical scheme that the force testing device is connected with the measurement and control computer can solve the problem well, and can be used for the push-pull force test of the electric cylinder.

Description

A kind of electric cylinder push-pull force test system and test method based on force component support

technical field

The invention relates to an electric cylinder push-pull force test system and a test method based on a force component support.

Background technique

Electric cylinder is a device that converts the rotary motion of the motor into linear motion. It has the advantages of precise control of position, speed and thrust, and is widely used in mechanical automation, industrial robots, automobiles and other fields. The real-time dynamic measurement of the push-pull force during the motion of the electric cylinder is an important test link in the development and production of the electric cylinder. The thrust test of the electric cylinder requires that the structure of the electric cylinder cannot be broken. The maximum thrust of the high-power erecting electric cylinder must reach more than 100 tons, but the maximum diameter of the shaft pin that can be installed at the earring is only 70mm. Therefore, it is a problem that needs to be solved not only to meet the installation requirements but also to withstand the push-pull force of the electric cylinder. To this end, we designed a large-range push-pull force measurement device for an electric cylinder based on a force component support. All component forces are within the range of the sensor, so as to achieve effective measurement of large tonnage changing forces;

Document CN 200520045197.7 discloses an electric cylinder test bench, an electric cylinder bracket with diagonal braces and a hydraulic device bracket are arranged at both ends of the bottom plate, and a column pin is fixed on the inner side of the electric cylinder bracket through a column pin horizontal plate, and the electric cylinder liner Connected to the pin, the hydraulic device is fixed on the hydraulic device bracket, a sensor is connected between the hydraulic device and the electric cylinder, the output end of the sensor is connected to the data processing and display device, and the electric cylinder is also connected to the electrical control box. The control circuit of the electrical control box consists of the main circuit, the relay control circuit and the auxiliary circuit;

Document 201510924738.1 discloses an electric cylinder push-pull limit test mechanism, including a base on which the electric cylinder is installed, a support set on the base, a guide rod slidingly matched with the support and coaxial with the telescopic rod of the electric cylinder, and A tension pressure sensor connected to the guide rod, and a first spring sleeved on the guide rod and located between the support and the tension pressure sensor, one end of the guide rod close to the tension pressure sensor is provided with a first spring matched with the end first gasket.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is that it is difficult to measure the push-pull force of a high-power electric cylinder in the prior art, and a new electric cylinder push-pull force test system based on a force component support is proposed. Solve the characteristics of push-pull test of high-power electric cylinders. The second technical problem solved by the present invention is to provide a method for testing the push-pull force of an electric cylinder based on a force component support corresponding to one of the technical problems solved.

In order to solve one of the above-mentioned technical problems, the technical solution adopted in the present invention is as follows: an electric cylinder push-pull force test system based on a force component support, including a landing gear, a force component test device, an electric cylinder, and a push rod of the electric cylinder The earring is connected with the force component testing device, the force component testing device is connected with one end of the landing gear, and one end of the landing gear is pushed and pulled by the electric cylinder, and the measured force is measured by the force component testing device. The push-pull force of the electric cylinder, the driver of the electric cylinder and the component force testing device are all connected to the measurement and control computer.

Further, preferably, the other end of the landing gear is hinged with the base 1, and the bottom of the electric cylinder body is hinged with the base 2.

Preferably, the component force testing device includes a measurement component connected to the landing gear and a force component component connected to the measurement component, and the component force component is connected to the push rod earring of the electric cylinder.

More preferably, the force component assembly includes a shaft connected with the push rod earring of the electric cylinder, the shaft is provided with at least two force component blocks, and each of the force component blocks is provided with at least four branches. Each of the supports is connected with a triaxial pressure sensor, and the triaxial pressure sensor is simultaneously connected with the landing gear.

More preferably, the force component block is preferably provided with two pieces, and the two force component blocks are respectively fixed on both ends of the shaft, and the support is preferably provided with four force component blocks, four force component blocks. Each of the supports is paired two by two, and the supports of each pair are respectively arranged on both sides of the force component block.

More preferably, the two said supports of each pair are connected by pivot pins passing through said force component blocks.

Preferably, the driver of the electric cylinder is connected to the measurement and control computer through a CAN bus.

More preferably, the measurement and control computer is connected with all the triaxial pressure sensors through a data acquisition card.

A method for testing the push-pull force of an electric cylinder based on a force component support, comprising the following steps:

Step ①: Connect the force component test device to the landing gear, and connect all the triaxial pressure sensors of the force component test device to the landing gear;

Step ②: Install the electric cylinder to be tested on the landing gear, and connect the pushrod earring of the electric cylinder to the shaft of the force component test device;

Step ③: connect the CAN card of the measurement and control computer and the CAN interface of the driver of the electric cylinder to the same CAN bus;

Step ④: connect the data acquisition card of the measurement and control computer and all the triaxial pressure sensors of the separation test device through the data cable;

Step ⑤: Turn on the main power supply, start the whole system for self-checking, start the measurement and control computer and start the data acquisition card to collect the data of the triaxial pressure sensor;

Step ⑥: Send commands to the driver of the electric cylinder through the measurement and control computer to control the push rod expansion and contraction of the electric cylinder, the measurement and control computer displays the push-pull force of the electric cylinder in real time, and the push-pull force F _{of the} electric cylinder is calculated by the data from all the three-axis pressure sensors The calculation formula is as follows:

(其中：F_X合表示X轴向的合力，n表示三轴压力传感器的个数)；

(where: F _X together represents the resultant force in the X axis, n represents the number of triaxial pressure sensors);

(其中：F_Y合表示Y轴向的合力，n表示三轴压力传感器的个数)；

(where: F _Y together represents the resultant force in the Y axis, and n represents the number of triaxial pressure sensors);

(其中：F_Z合表示Z轴向的合力，n表示三轴压力传感器的个数)；

(where: F _Z together represents the resultant force in the Z axis, n represents the number of triaxial pressure sensors);

(n个三轴拉压力传感器在x轴、y轴和z轴上受到的合力)。

(the resultant force on the x-axis, y-axis and z-axis of n triaxial tension and pressure sensors).

The beneficial effects of the present invention are: the present invention can withstand the push-pull force of the high-power electric cylinder through the force component test device, effectively measure the push-pull force of the electric cylinder when pushing and pulling the landing gear in real time, and calculate the push-pull force data through the measurement and control computer. And display, high measurement accuracy.

Description of drawings

Fig. 1 is a kind of structural representation of the electric cylinder push-pull force test system based on the force component support of the present invention;

2 is a schematic structural diagram of a force component test device of an electric cylinder push-pull force test system based on a force component support of the present invention;

FIG. 3 is a test system diagram of an electric cylinder push-pull force test system based on a force component support of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

Please refer to FIG. 1, an electric cylinder push-pull force test system based on a force component support, including a landing gear 1, a force component test device 2, and an electric cylinder 3, the push rod earrings 32 of the electric cylinder 3 and the force component The test device 2 is connected, and the force component test device 2 is connected to one end of the landing gear 1, and one end of the landing gear 1 is pushed and pulled by the electric cylinder 3, and at the same time, the force component test device 2 measures the The push-pull force of the electric cylinder 3, the driver of the electric cylinder 3 and the force component testing device 2 are all connected with the measurement and control computer 4;

The other end of the landing gear 1 is hinged with the base one 11, and the bottom of the electric cylinder 3 is hinged with the base two 31;

As shown in FIG. 2 , the component force testing device 2 includes a measurement component connected to the landing gear 1 and a component force component connected to the measurement component. The component force component is connected to the push rod earring of the electric cylinder 3 . 32 connection, the force component component includes the shaft 21 connected with the push rod earring 32 of the electric cylinder 3, the force component component is small in size and the diameter of the shaft 21 is not greater than 70mm, which meets the installation requirements of the electric cylinder push rod earring 32, The influence of the weight of the electric cylinder 3 on the measurement is avoided, the pushing and pulling force of the electric cylinder 3 can be directly measured, and the measurement accuracy is improved. There are two pieces, the force component block 22 is in the shape of a triangular cylinder, and the two force component blocks 22 are respectively fixed on both ends of the shaft 21, and one end of the shaft 21 passes through the triangular side surface 221 of one side of the force component block 22. Each of the force component blocks 22 is provided with at least four supports 23, the supports 23 are preferably provided with four on the force component blocks 22, and the four supports The seats 23 are paired in pairs, and the supports 23 of each pair are respectively arranged on both sides of the force component block 22, and the two supports 23 of each pair pass through the force component block. Axle pins 24 are connected, two ends of the axle pins 24 protrude from the two triangular sides 221 of the force component block 22, and each end of the axle pins 24 is fixed with a support 23, and each of the supports 23 is connected with a triaxial pressure sensor 25 , there are preferably eight triaxial pressure sensors 25, and the triaxial pressure sensors 25 are connected to the landing gear 1 at the same time;

The component force block 22 is selected in a triangular shape to form a triangular component force, and the push-pull force of the electric cylinder 3 is decomposed into two force component blocks 22, and each force component block 22 decomposes the force to its respective four supports 23, Each support 23 decomposes the force into its own triaxial pressure sensor 25 so that the triaxial pressure sensor 25 receives the force from the x-axis, y-axis and z-axis directions. By calculating the eight triaxial pressure sensors 25 The resultant force received in the x-axis, y-axis and z-axis directions can calculate the push-pull force of the electric cylinder 3, the push-pull force of the electric cylinder 3 is more than 100 tons, the range of each triaxial pressure sensor 25 is 20 tons, 8 The total range of the three-axis pressure sensors 25 is 160 tons, so that the maximum push-pull force of the electric cylinder 3 can reach 160 tons, so as to meet the measurement range requirements;

Further, as shown in FIG. 3 , the driver of the electric cylinder 3 is connected to the measurement and control computer 4 through the CAN bus, and the measurement and control computer 4 is connected to all the triaxial pressure sensors 25 through the data acquisition card.

A method for testing the push-pull force of an electric cylinder based on a force component support, comprising the following steps:

Step ①: Connect the force component test device 2 to the landing gear 1, and connect all the triaxial pressure sensors 25 of the force component test device 2 to the landing gear 1;

Step 2: Install the electric cylinder 3 to be tested on the landing gear 1, and connect the push rod earring 32 of the electric cylinder 3 to the shaft 21 of the force component testing device 2;

Step ③: connect the CAN interface card of the measurement and control computer 4 and the CAN interface of the driver of the electric cylinder 3 to the same CAN bus;

Step ④: connect the data acquisition card of the measurement and control computer 4 and all the triaxial pressure sensors 25 of the separation test device 2 through a data cable;

Step ⑤: turn on the main power supply, start the whole system for self-checking, start the measurement and control computer 4 and turn on the data acquisition card for the data collection of the triaxial pressure sensor 25;

Step ⑥: Send commands to the driver of the electric cylinder 3 through the measurement and control computer 4 to control the push rod of the electric cylinder 3 to expand and contract, the measurement and control computer 4 displays the push-pull force of the electric cylinder 3 in real time, and the push-pull force F _{of the} electric cylinder 3 is determined by all three The data of the shaft pressure sensor is calculated, and the calculation formula is as follows:

(其中：F_X合表示X轴向的合力，8表示优选采用的8个三轴压力传感器)；

(wherein: F _X together represents the resultant force in the X-axis, and 8 represents the preferred 8 triaxial pressure sensors);

(其中：F_Y合表示Y轴向的合力，8表示优选采用的8个三轴压力传感器)；

(wherein: F _{and Y} together represent the resultant force in the Y-axis, and 8 represent the 8 triaxial pressure sensors that are preferably used);

(其中：F_Z合表示Z轴向的合力，8表示优选采用的8个三轴压力传感器)；

(wherein: F _Z together represents the resultant force in the Z-axis, and 8 represents the preferred 8 triaxial pressure sensors);

(8个三轴压力传感器在x轴、_y轴和z轴上受到的合力)。

(The resultant force on the x-axis, _y -axis and z-axis of the 8 triaxial pressure sensors).

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims (5)

1. The utility model provides an electronic jar push-pull force test system based on component support which characterized in that: the electric force testing device is used for measuring the push-pull force of the electric cylinder, a driver of the electric cylinder and the component force testing device are connected with a measurement and control computer;

the component force testing device comprises a measuring assembly connected with the undercarriage and a component force assembly connected with the measuring assembly, and the component force assembly is connected with a push rod earring of the electric cylinder;

the component force assembly comprises a shaft connected with a push rod earring of the electric cylinder, two component force blocks are arranged on the shaft, four supports are arranged on each component force block, each support is connected with a triaxial pressure sensor, and the triaxial pressure sensors are simultaneously connected with the undercarriage;

the two component force blocks are respectively fixed at two ends of the shaft, and one end of the shaft penetrates into the triangular side surface at one side of the component force block and is fixed with the component force block;

the four supports form a pair of pairs, and the supports of each pair are respectively arranged on two sides of the force component block;

the two supports of each pair are connected through a shaft pin penetrating through the component force block, two ends of the shaft pin penetrate out of two triangular side faces of the component force block, and one support is fixed at each end of the shaft pin.

2. The component force bearing-based electric cylinder push-pull force test system as claimed in claim 1, wherein the other end of the landing gear is hinged to the first base, and the bottom of the electric cylinder body is hinged to the second base.

3. The component force bearing-based electric cylinder push-pull force test system as claimed in claim 1, wherein the driver of the electric cylinder is connected to the test control computer through a CAN bus.

4. The component force support-based electric cylinder push-pull force test system as claimed in claim 1, wherein said measurement and control computer is connected to all said three-axis pressure sensors through a data acquisition card.

5. A test method applied to the component force support-based electric cylinder push-pull force test system according to claim 1, wherein the test method comprises the following steps: comprises the following steps of (a) carrying out,

the method comprises the following steps: connecting the component force testing device with the undercarriage, and connecting all three-axis pressure sensors of the component force testing device with the undercarriage;

step two: mounting the tested electric cylinder on the undercarriage, and connecting a push rod earring of the electric cylinder with a shaft of the component force testing device;

step three: connecting a CAN card of a measurement and control computer and a CAN interface of a driver of an electric cylinder to the same CAN bus;

step IV: connecting a data acquisition card of a measurement and control computer with all three-axis pressure sensors of a separation testing device through data cables;

step five: starting a main power supply, starting the whole system for self-checking, starting a measurement and control computer and starting a data acquisition card to acquire data of the three-axis pressure sensor;

step (c): the control method comprises the steps of sending an instruction to a driver of the electric cylinder through the measurement and control computer, controlling the extension and contraction of a push rod of the electric cylinder, displaying the push-pull force of the electric cylinder in real time through the measurement and control computer, and displaying the push-pull force F of the electric cylinder_{Combination of Chinese herbs}Calculated from data from all three-axis pressure sensors, the formula is as follows:

wherein: f_{X is combined}The resultant force in the X axial direction is represented, and n represents the number of the three-axis pressure sensors;

wherein: f_{Y is a}The resultant force of the Y axis is shown, and n represents the number of the three-axis pressure sensors;

wherein: f_{Z is close to}The resultant force in the Z axial direction is represented, and n represents the number of the three-axis pressure sensors;

the resultant forces on the x-axis, the y-axis and the z-axis of the n three-axis tension and pressure sensors are obtained.

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