WO2023179166A1

WO2023179166A1 - Air bag type floating loading mechanism

Info

Publication number: WO2023179166A1
Application number: PCT/CN2022/143775
Authority: WO
Inventors: 冯冰; 张鹏; 阮久宏; 贾倩; 管志光; 张吉卫; 杨福广; 王刚; 吴清珍; 国兴玉; 冯晋祥; 韩鹰; 王慧君
Original assignee: 山东交通学院
Priority date: 2022-03-25
Filing date: 2022-12-30
Publication date: 2023-09-28
Also published as: CN114754950A

Abstract

The present invention belongs to the technical field of bridge experiment equipment. Disclosed is an air bag type floating loading mechanism. The air bag type floating loading mechanism disclosed in the present invention comprises: a loading main body, loading wheels, rolling wheels, an air bag and a pressure sensor. The loading wheels are arranged on an upper surface of the loading main body; first central shafts of the loading wheels are parallel to the upper surface and are perpendicular to the length direction of the loading main body; the loading wheels comprise first loading wheels and second loading wheels, the first loading wheels being located at the left part of the upper surface, and the second loading wheels being located at the right part of the upper surface; the rolling wheels are arranged on a lower surface; second central shafts of the rolling wheels are parallel to the first central shafts; the air bag is arranged between the first loading wheels and the upper surface; the pressure sensor is connected between the second loading wheels and the upper surface. The air bag type floating loading mechanism is used for bridge durability wheel load experiment equipment. The loading wheels run on a track in a floating uniform-force contact manner, and the multiple rolling wheels run on a bridge deck in a floating uniform-force contact manner, so that the application range of a loading vehicle is expanded.

Description

Air bag floating loading mechanism

Technical field

The invention relates to an air bag type floating loading mechanism and belongs to the technical field of bridge experimental equipment.

Background technique

The bridge durability wheel load test is to test and detect the durability of physical bridges and pavement materials and structures of different lengths. During the bridge durability wheel load test, it is necessary to simulate the process of vehicles repeatedly rolling over the bridge and road surface. Currently, there is no experimental device for bridge durability wheel load testing in the prior art, and the prior art does not disclose a bridge durability wheel load testing device or a loading mechanism for simulating repeated rolling of bridges and road surfaces by vehicles.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a loading mechanism for a bridge durability wheel load experimental device, an airbag floating loading mechanism.

In order to achieve the above objects, the present invention adopts the following technical solutions:

The airbag floating loading mechanism includes: a loading body, a loading wheel, a rolling wheel, an airbag and a pressure sensor; the loading body includes an upper surface and a lower surface, and the loading body has a length direction; the loading wheel is arranged on the upper surface ; The loading wheel includes a first central axis, the first central axis is parallel to the upper surface and perpendicular to the length direction, and the loading wheel rotates around the first central axis; the loading wheel includes a first loading wheel and a second Loading wheels, the first loading wheel is located on the left part of the upper surface, and the second loading wheel is located on the right part of the upper surface; the rolling wheel is arranged on the lower surface; the rolling wheel includes a second central axis, and the second The central axis is parallel to the first central axis, and the rolling wheel rotates around the second central axis; the air bag is arranged between the first loading wheel and the upper surface; the pressure sensor is connected between the second loading wheel and the upper surface. between.

The airbag-type floating loading mechanism of the present invention is used in a bridge durability wheel load experimental device, and is driven by a driving mechanism to roll the experimental bridge back and forth.

The beneficial effects of the present invention are:

1) The top of the airbag floating loading mechanism is equipped with a loading wheel. The airbag floating loading mechanism contacts other mechanisms of the bridge durability wheel load test equipment (hereinafter referred to as other mechanisms) through the loading wheel; the movement mode of the loading wheel is rolling, making the airbag The friction between the airbag floating loading mechanism and other mechanisms is rolling friction, which greatly reduces the operating resistance between the airbag floating loading mechanism and other mechanisms;

2) The number of rolling wheels is more than two. The rolling wheels at the left and right ends are connected by suspension. The suspension and the loading body are connected by a suspension shaft. The suspension shaft and the loading body are dynamically connected. The suspension drives the rolling wheel and the loading body to move relative to each other, and the distance between the two can change, allowing multiple rolling wheels to float in uniform contact with the bridge deck;

3) The connection method between the rolling wheel and the loading body makes it possible to monitor the loading force of the entire airbag floating loading mechanism by installing a pin-type sensor at the loading wheel at one end of the airbag floating loading mechanism; and , only needing to install an airbag at one end of the airbag-type floating loading mechanism can complete the shock absorption and buffering of the entire airbag-type floating loading mechanism; moreover, the airbag can increase the elasticity of the loading trolley and adapt to the unevenness of the experimental bridge deck;

4) The number of coaxial rolling wheels (the second central axis is located in the same straight line) is more than 2, that is, the rolling wheels adopt a double-row wheel design, which makes the airbag floating loading mechanism more effective in rolling bridges and pavements. Close to the real situation, making the experimental data more realistic;

5) The number of loading wheels is more than 2, and the connecting rod and the loading wheel pin are hinged as the connection structure between the loading wheel and the loading body; this not only simplifies the structure but also reduces the dead weight, and ensures that the loading wheel and the track are in uniform contact with each other. run.

Description of the drawings

Figure 1 is a schematic front view of the airbag floating loading mechanism disclosed in the specific embodiment of the present invention;

Figure 2 is a schematic diagram of view A-A of Figure 1;

Figure 3 is a schematic diagram of the B-B view of Figure 1;

Figure 4 is a schematic diagram of the loading body of the airbag floating loading mechanism disclosed in the specific embodiment of the present invention;

Figure 5 is a schematic diagram of the loading wheel seat box of the airbag floating loading mechanism disclosed in the specific embodiment of the invention;

In the figure, 1. Loading body, 101. Upper surface, 102. Lower surface, 2. Airbag, 201. Airbag bottom plate, 3. Loading wheel, 301. First loading wheel, 302. Second loading wheel, 303. First Central axis, 4. Loading wheel box seat, 401. First loading wheel box seat, 402. Second loading wheel box seat, 5. Loading wheel pin, 6. Connecting rod, 7. Axis pin sensor, 8. Roller Pressing wheel, 801. Second central axis, 9. Suspension shaft, 10. Rigid suspension, 11. Rolling axle, 12. Air bag limiter, 13. Experimental bridge, 14. Driving mechanism, 15. Horizontal track.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples.

The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to coordinate with the content disclosed in the specification and are for the understanding and reading of those familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented. Therefore, It has no technical substantive significance. Any structural modifications, changes in proportions or adjustments in size shall still fall within the scope of the technology disclosed in the present invention as long as it does not affect the effectiveness and purpose of the present invention. within the scope of the content covered. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for convenience of description and are not used to limit the scope of this specification. The scope of the invention that can be implemented, and changes or adjustments in their relative relationships, as long as there is no substantial change in the technical content, shall also be regarded as the scope of the invention that can be implemented.

As shown in the figure, the airbag 2-type floating loading mechanism includes: loading body 1, loading wheel 3, rolling wheel 8, airbag 2 and pressure sensor; loading body 1 includes an upper surface 101 and a lower surface 102, and the loading body 1 has a length direction ; The loading wheel 3 is arranged on the upper surface 101; the loading wheel 3 includes a first central axis 303, and the loading wheel 3 rotates around the first central axis 303; the first central axis 303 is parallel to the upper surface 101 and perpendicular to the length direction; loading The wheel 3 includes a first loading wheel 301 and a second loading wheel 302. The first loading wheel 301 is located on the left part of the upper surface 101, and the second loading wheel 302 is located on the right part of the upper surface 101; the rolling wheel 8 is provided on the lower surface 102. ; The rolling wheel 8 includes a second central axis 801, and the rolling wheel 8 rotates around the second central axis 801; the second central axis 801 is parallel to the first central axis 303; the airbag 2 is arranged on the first loading wheel 301 and on between the surfaces 101; the pressure sensor is connected between the second loading wheel 302 and the upper surface 101.

The loading wheel 3 is disposed on the upper surface 101 of the loading body 1, and the rolling wheel 8 is disposed on the lower surface 102 of the loading body 1; the movement directions of the loading wheel 3 and the rolling wheel 8 are consistent; specifically, when the loading wheel 3 rotates, its level The tangent line is along the length direction of the loading body 1; when the rolling wheel 8 rotates, its horizontal tangent line is along the length direction of the loading body 1; during use, the loading wheel 3 contacts the track above it and moves along the track, and the loading wheel 3 moves along the track. The movement direction of the track is consistent with the length direction of the loading body 1; the rolling wheel 8 contacts the experimental bridge 13 located below it, rolls the experimental bridge 13, and moves along the experimental bridge 13. The rolling wheel 8 moves in the same direction as the bridge. The length direction of the loading body 1 is consistent. The function of the loading body 1 is to install the loading wheel 3, the rolling wheel 8, the airbag 2 and the pressure sensor. It can be designed in any shape, specifically, it can be designed in the shape of a car body; at this time, the loading wheel 3 is used as a wheel to load The main body 1 is the vehicle body to form the entire vehicle structure. At the same time, the rolling wheels 8 are used as wheels and the loading body 1 is the vehicle body to form the entire vehicle structure; the entire loading mechanism forms a double-sided vehicle structure.

Among them, both the loading wheel 3 and the rolling wheel 8 can adopt the existing wheel structure; the loading body 1 can adopt the main structure of the existing car body, which can realize the installation of the loading wheel 3, the rolling wheel 8 and the air bag 2 and the loading wheel structure. 3 and rolling wheel 8 can rotate after being installed. Normally, the upper surface 101 of the loading body 1 has an installation position, and the installation position is a recessed structure; the installation position includes a first installation position and a second installation position, the first installation position is used to install the first loading wheel 301, and the second installation position The position is used to install the second loading wheel 302; in order to ensure the installation of the airbag 2, the loading body 1 adopts an asymmetric structure. The degree of depression at the first installation position is greater than the degree of depression at the second position. It is possible to install at the first installation position. The upper surface 101 of the airbag 2 is then flush with the upper surface 101 of the second installation position. The airbag 2 can be an approximately flat rectangular parallelepiped structure, with its bottom surface fixed to the first installation position of the upper surface 101 of the loading body 1, and its upper surface connected to the first loading wheel 301; the airbag 2 can be connected to the first loading wheel 301 through a connecting component. , one end of the connecting component is connected to the loading wheel 3, and the other end is connected to the top of the airbag 2. The bottom surface of the airbag 2 can adopt a rigid structure, such as the airbag bottom plate 201; the bottom end of the airbag 2 is sealed and fixed at the first installation position through the airbag bottom plate 201.

The loading wheel 3 can be made of the wheel material of the existing experimental loading vehicle. The number of the first loading wheel 301 or the second loading wheel 302 is a multiple of 2, the first central axis of the first loading wheel 301 is located on the same straight line, and the first central axis of the second loading wheel 302 is located on the same straight line; symmetrically distributed in The front and rear sides of the upper surface 101 . For example, two first loading wheels 301 are respectively located on the front and rear sides of the first installation position and are symmetrically distributed; two second loading wheels 302 are respectively located on the front and rear sides of the second installation position and are symmetrically distributed; or, The number of first loading wheels 301 is 4, and the number of second loading wheels 302 is 4; two first loading wheels 301 are located on the front side of the first installation position, and two first loading wheels 301 are located on the rear side of the first installation position. side, symmetrically distributed; two second loading wheels 302 are located on the front side of the second installation position, and two second loading wheels 302 are located on the rear side of the second installation position, symmetrically distributed; four loading wheels 3 located on the same side are located on The same length direction, that is, the line connecting the end points of the first central axes 303 of the four loading wheels 3 located on the same side, is along the length direction of the loading body 1 .

The loading wheel 3 can be arranged on the loading body 1 in the following manner: using an existing connection structure to connect the loading wheel 3 to the upper surface 101 of the loading body 1 . Specifically, the connecting rod 6 and the loading wheel pin 5 can be used as the connecting structure; the connecting rod 6 is connected between the first loading wheel 301 and the second loading wheel 302 on the same side; the loading wheel pin 5 is connected to the loading wheel pin 5 on the same side. between the two first loading wheels 301 on both sides. For example, the connecting rod 6 is connected between the hub of the first loading wheel 301 and the hub of the second loading wheel 302, and the loading wheel pin 5 is axially connected between the two first loading wheel 301 hubs. The loading wheel box seat 4 can also be used as the installation component of the loading wheel 3. The loading wheel box seat 4 includes a first loading wheel box seat 401 and a first loading wheel box seat 402; the first loading wheel box seat 401 is provided between the air bag 2 and the first loading wheel box seat 402. Between the first loading wheels 301, the first loading wheel box seat 402 is provided between the upper surface 101 and the second loading wheel 302; the first loading wheel box seat 401 is used to install the first loading wheel 301, the first loading wheel box The seat 402 is used to install the second loading wheel 302. When using the first loading wheel box seat 401 and the first loading wheel box seat 402, the loading wheel 3 located at the same installation position and on the same side is installed on the same loading wheel box seat 4; the connecting rod 6 is connected to the third loading wheel box seat located on the same side. Between a loading wheel box seat 401 and a first loading wheel box seat 402.

The rolling wheel 8 can be made of the existing wheel material of the experimental loading vehicle. The size of the rolling wheel 8 can be larger than the size of the loading wheel 3 . The number of rolling wheels 8 is a multiple of 2, distributed left and right, with the rolling wheel 8 on the left close to the rolling wheel 8 on the right; for example, the number of rolling wheels 8 is 2, and the two rolling wheels 8 are located at the same length direction, that is, the line connecting the end points of the second central axes 801 of the two rolling wheels 8 is along the length direction of the loading body 1 . The number of rolling wheels 8 can also be a multiple of 4, evenly distributed on the left and right. The rolling wheel 8 on the left is close to the rolling wheel 8 on the right. The rolling wheels 8 on the same side are coaxial, that is, the rolling wheels 8 on the same side are coaxial. The second central axis 801 of the rolling wheels 8 is located on the same straight line; for example, the number of rolling wheels 8 is 4, two on the left and two on the right. The rolling wheels 8 on the same side are coaxial, and the rolling wheel 8 on the left is coaxial. The line connecting the end point of the second central axis 801 and the end point of the second central axis 801 of the rolling wheel 8 on the right is along the length direction of the loading body 1 .

The rolling wheel 8 can be arranged on the loading body 1 in the following manner: using an existing connection structure to connect the rolling wheel 8 to the lower surface 102 of the loading body 1 . Specifically, the suspension and the rolling wheel axle 11 can be used as the connecting structure; the left and right ends of the suspension are connected between the two rolling wheels 8 located on the left and right sides in the same length direction, and the upper end of the suspension is connected to the lower surface. 102; The rolling wheel axle 11 is connected between the coaxial rolling wheels 8 located on the same side. Specifically, the suspension is connected to the hub of the rolling wheel 8, and the rolling axle 11 is connected to the hub of the rolling wheel 8. The suspension can be connected to the lower surface 102 through the suspension shaft 9 . One end of the suspension shaft 9 is connected to the suspension, and the other end is dynamically connected to the lower surface 102 of the loading body 1 . The other end of the suspension shaft 9 is dynamically connected to the lower surface 102 of the loading body 1 , which means that the suspension shaft 9 can rotate in a vertical plane with the connection position as the axis, and the horizontal tangent of the rotation trajectory of the suspension shaft 9 is along the length of the loading body 1 direction; for example, the lower surface 102 of the suspension shaft 9 and the loading body 1 is hinged. The suspension can adopt rigid suspension10.

The pressure sensor is connected between the second loading wheel 302 and the upper surface 101 . The pressure sensor can be a pin-type sensor 7. Specifically, the first loading wheel box seat 402 is hinged to the upper surface 101 of the loading body 1 through the pin-type sensor 7.

The airbag limiting member 12 is disposed between the first loading wheel 301 and the airbag 2 to limit the loading force of the first loading wheel 301 on the airbag 2 .

The airbag 2-type floating loading mechanism (hereinafter referred to as the loading mechanism) of the present invention is used as the loading mechanism of the bridge durability wheel load experimental device (hereinafter referred to as the experimental device). The experimental device also includes a support mechanism, an installation mechanism, a flywheel, a second track, a driving mechanism 14, a first power mechanism, a second power mechanism, and a first track; the support mechanism has an experimental space, the experimental space has a length direction, and the experimental space is located along the length Both ends of the direction are open; the installation mechanism is set in the experimental space and connected to the support mechanism; the flywheel is set vertically above the installation mechanism and connected to the installation mechanism, and the vertical plane where the flywheel is located is parallel to the length direction of the experimental space; the second track is set On the bottom surface of the installation mechanism, the movement direction of the second track is consistent with the length direction of the experimental space; the loading mechanism is arranged below the second track and moves back and forth along the second track; one end of the driving mechanism 14 is dynamically connected to the flywheel, and the other end is connected to the loading mechanism. Dynamically connected; the second power mechanism is connected to the flywheel to provide power for the flywheel; the first rail is set vertically on the inner side, and the movement direction of the first rail is up and down; the first power mechanism is connected to the installation mechanism to provide power for the installation mechanism. The mounting mechanism is moved up and down along the first track. Specifically, the second loading wheel 302 or the first loading wheel box seat 402 of the loading mechanism is dynamically connected to the other end of the lower link; for example, the other end of the lower link is hinged to the hub of the second loading wheel 302 or the first loading wheel. The middle position of the box base 402. The loading wheel 3 moves back and forth along the second track, and the rolling wheel 8 rolls the experimental bridge 13.

When in use, the loading mechanism is connected to the flywheel of the experimental device through the driving mechanism 14, the loading wheel 3 is in contact with the horizontal track 15 of the experimental device, and the rolling wheel 8 is in contact with the experimental bridge 13 placed horizontally in the experimental device. The experimental device drives the flywheel and the driving mechanism 14 to move downward through other mechanisms, exerting a loading force on the loading mechanism. The loading force is monitored through the pressure sensor of the loading mechanism, and the loading force of the experimental device on the loading mechanism is limited through the airbag limiter 12. The flywheel rotates to drive the driving mechanism 14 to move back and forth horizontally. The loading mechanism moves back and forth horizontally under the drive of the driving mechanism 14. The loading wheel 3 moves back and forth horizontally along the horizontal track 15. The rolling wheel 8 carrying the loading force rolls the experimental bridge 13 back and forth. pressure.

Example 1

The upper end of the air bag 2 is sealed and fixed at the bottom of the first loading wheel box seat 401. The left and right ends of the first loading wheel box seat 401 are each supported by two pins through bearings. Four first loading wheels 301 are supported. The lower end of the air bag 2 is connected to the bottom plate of the air bag. 201 is sealed and seated on the loading body 1. The left and right ends of the first loading wheel box seat 402 are each supported by two pins through bearings. Two second loading wheels 302 are supported. The first loading wheel box seat 402 is hinged to the upper surface of the loading body 1 through a pin sensor 7 101; One end of the bridge deck reaction force of the loading body 1 is exerted through the rolling wheel 8, the suspension, the loading body 1, the airbag bottom plate 201, the airbag 2, the first loading wheel box seat 401, the pin, the bearing, and the first loading wheel 301 On the track, the other end is applied to the track through the rolling wheel 8, suspension, frame, pin sensor 7, first loading wheel box seat 402, pin, bearing, and second loading wheel 302; the loading mechanism can It floats and reciprocates between the track and the bridge deck to conduct wheel load experiments on experimental bridge 13 and pavement material and structure durability.

In the present invention, the terms "left", "right", "upper", "lower", "front" and "rear" take the view of Figure 1 as an example.

Although the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, they do not limit the scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, those skilled in the art do not need to perform creative work. Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims

The airbag floating loading mechanism is characterized by including:

A loading body, the loading body includes an upper surface and a lower surface, and the loading body has a length direction;

A loading wheel, the loading wheel is arranged on the upper surface; the loading wheel includes a first central axis, the first central axis is parallel to the upper surface and perpendicular to the length direction, and the loading wheel rotates with the first central axis as an axis; so The loading wheel includes a first loading wheel and a second loading wheel, the first loading wheel is located on the left part of the upper surface, and the second loading wheel is located on the right part of the upper surface;

A rolling wheel, the rolling wheel is arranged on the lower surface; the rolling wheel includes a second central axis, the second central axis is parallel to the first central axis, and the rolling wheel rotates around the second central axis;

an airbag disposed between the first loading wheel and the upper surface; and,

A pressure sensor is connected between the second loading wheel and the upper surface.
The loading mechanism according to claim 1, further comprising a suspension and a suspension shaft, the number of the rolling wheels is a multiple of 2, distributed left and right; the suspension is connected to the rolling wheels on the left and right sides between; one end of the suspension shaft is connected to the suspension, and the other end is dynamically connected to the lower surface.
The loading mechanism according to claim 2, characterized in that the suspension shaft is hinged with the lower surface, and the horizontal tangent of the rotation path of the suspension shaft is along the length direction of the loading body.
The loading mechanism according to claim 2, characterized in that the number of the rolling wheels is a multiple of 4, evenly distributed on the left and right, and the second central axes of the rolling wheels located on the same side are located on the same straight line.
The loading mechanism according to claim 4, further comprising a rolling wheel axle; the rolling wheel axle is connected between rolling wheels located on the same side.
The loading mechanism according to claim 1, further comprising an airbag limiting member; the airbag limiting member is provided between the first loading wheel and the airbag to limit the loading force of the first loading wheel on the airbag.
The loading mechanism according to claim 1, characterized in that the number of the first loading wheel or the second loading wheel is a multiple of 2, the first central axis of the first loading wheel is located on the same straight line, and the number of the second loading wheel is The first central axis is located on the same straight line.
The loading mechanism according to claim 7, further comprising a connecting rod; the connecting rod is connected between the first loading wheel and the second loading wheel located on the same side.
The loading mechanism according to claim 1, further comprising a loading wheel pin, and the loading wheel pin is connected between the two first loading wheels located on both sides.
The loading mechanism according to claim 1, further comprising a first loading wheel box seat and a second loading wheel box seat, the first loading wheel box seat being disposed between the air bag and the first loading wheel; The two loading wheel box seats are arranged between the upper surface and the second loading wheel; the connecting rod is connected between the first loading wheel box seat and the second loading wheel box seat located on the same side.