A simple positioning device for loading vehicles in bridge load testing

Abstract

This application relates to the technical field of measurement and positioning, and in particular to a simple positioning device for a loading vehicle in a bridge load test. The device includes a movable base, a support positioning assembly, a rotating assembly, and a measuring assembly. An inkjet cartridge is disposed at the bottom of the movable base. The support positioning assembly is mounted on the movable base. The rotating assembly is mounted on the support positioning assembly and is capable of rotating around it. The support positioning assembly is used to position the angle of the rotating assembly. The measuring assembly is connected to the rotating assembly and can rotate with it. This application improves the accuracy of test results.

Description

Technical Field

[0001] This application relates to the technical field of measurement and positioning, and in particular to a simple positioning device for a bridge load test loading vehicle. Background Technology

[0002] Currently, in the field of bridge engineering, load testing is a crucial method for evaluating the load-bearing capacity and performance of bridges. With the continuous development of bridge construction, bridge types are becoming increasingly diverse, with complex bridge types such as long-span bridges and skew bridges constantly emerging. Accurately positioning the load testing vehicle is essential for obtaining reliable test data and assessing the actual load-bearing capacity of the bridge. It not only relates to the safety evaluation of the bridge but also influences subsequent maintenance and management decisions. Therefore, efficient and precise load vehicle positioning technology is of great significance for the successful conduct of bridge load tests.

[0003] In previous bridge load tests, tools such as measuring tapes and tape measures were typically used to determine the loading position of the loaded vehicle. Operators needed to repeatedly stretch the tape across the bridge deck to carefully mark the location where the loaded vehicle should be parked, and then perform multiple calibrations to ensure the accuracy of the position.

[0004] However, for complex bridge types such as skew bridges, the positioning tools mentioned above cannot accurately reflect the actual transmission path of vehicle loads, resulting in a deviation between the actual loading position and the theoretical loading position, thus affecting the accuracy of the test results.

[0005] Therefore, there is an urgent need for a simple positioning device for bridge load testing vehicles. Utility Model Content

[0006] To improve the accuracy of test results, this application provides a simple positioning device for a loading vehicle in bridge load testing.

[0007] This application provides a simple positioning device for a bridge load testing vehicle, which adopts the following technical solution:

[0008] A simple positioning device for a bridge load test loading vehicle includes:

[0009] A movable base, wherein an inkjet cartridge is provided at the bottom of the movable base;

[0010] A support positioning component is mounted on the movable base;

[0011] A rotating component is disposed on the support and positioning component, the rotating component being capable of rotating around the support and positioning component, and the support and positioning component being used to position the angle of the rotating component.

[0012] A measuring component is connected to the rotating component, and the measuring component is capable of rotating with the rotating component.

[0013] By adopting the above technical solution, an inkjet cartridge is installed at the bottom of the mobile base, which can spray ink to mark the bridge deck coordinates when it moves to a designated position, thus marking the position of the loaded vehicle. A support positioning component is mounted on the mobile base, and the rotating component can rotate around it. The support positioning component can also position the angle of the rotating component, allowing the device to adjust the rotating component to a suitable angle based on actual conditions such as the bridge's skew angle, adapting to different bridge types. The measuring component is connected to the rotating component and can rotate with it. The measurement direction can be adjusted by rotating the rotating component. Combined with the angle determined by the support positioning component, the theoretical distances from the theoretical position of the loaded vehicle to the longitudinal guardrail and transverse expansion joint of the bridge can be accurately measured. This allows for simultaneous positioning of the vehicle's longitudinal and transverse positions on the bridge deck. The entire positioning process is simple and fast, significantly improving test efficiency compared to traditional positioning techniques that require repeated measuring, marking, and calibration, and involve multiple operators. It avoids deviations between the actual and theoretical loading positions, achieving simple, fast, and accurate positioning of the loaded vehicle in load tests.

[0014] Optionally, the support positioning assembly includes a support rod and a disc angle gauge. The support rod is mounted on the movable base, the disc angle gauge is mounted on the side of the support rod away from the movable base, and the rotating assembly is mounted on the support rod.

[0015] By adopting the above technical solution, the disc angle gauge is set on the side of the support rod away from the moving base, and the rotating component is set on the support rod. This allows the rotating component to rotate around the support rod, and the disc angle gauge can accurately position the rotation angle of the rotating component. Thus, during the positioning of the loaded vehicle in the bridge load test, the angle of the rotating component can be precisely adjusted according to the actual situation of the bridge (such as the skew angle), thereby ensuring that the measuring component connected to the rotating component is in a suitable measuring position. This achieves accurate measurement and positioning of the loaded vehicle, avoiding the problem that traditional positioning tools cannot accurately reflect the actual transmission path of the vehicle load, leading to deviations in the loading position, and improving the positioning accuracy. At the same time, compared with the traditional positioning method that requires multiple people to repeatedly pull the tape measure, mark, and calibrate, this device is easier to operate, saves manpower and time, and improves test efficiency.

[0016] Optionally, at least one set of the rotating assembly is provided. The rotating assembly includes a rotating sleeve and a rotating shaft. The rotating sleeve is movably sleeved on the support and positioning assembly. One end of the rotating shaft is rotatably connected to the rotating sleeve, and the other end of the rotating shaft is connected to the measuring assembly.

[0017] By adopting the above technical solution, the rotating sleeve is movably fitted on the support and positioning component, allowing the rotating sleeve to rotate around the support and positioning component. One end of the rotating shaft is rotatably connected to the rotating sleeve, and the other end is connected to the measuring component, so that the rotating shaft can rotate around the support and positioning component together with the rotating sleeve. At the same time, the rotating shaft itself can also rotate relative to the rotating sleeve. The angle of the rotating shaft can be flexibly adjusted according to the actual site conditions of the bridge skew angle or other complex bridge types, thereby driving the measuring component to rotate and changing the measuring path.

[0018] Optionally, the measuring component includes a measuring tape and a telescopic rod. The measuring tape is coaxially mounted on the rotating shaft, and the telescopic rod is placed on the movable base. The zero mark end of the measuring tape is connected to the telescopic rod.

[0019] By adopting the above technical solution, the measuring tape is coaxially mounted on the rotating shaft, allowing it to rotate with the shaft and facilitating adjustment of the measurement direction. After placing the device at a bridge corner and adjusting the rotating shaft according to the bridge's skew angle, the lower end of the telescopic rod is placed at the bridge railing or expansion joint as the starting point. When the moving base is pushed, the measuring tape is stretched. By reading the measuring tape, the theoretical distance between the theoretical position of the loaded vehicle and the longitudinal railing and transverse expansion joint of the bridge can be accurately obtained. This achieves the purpose of simultaneously locating the longitudinal and transverse positions of the vehicle and quickly marking them, avoiding the problems of repeated tape pulling, marking, and calibration, as well as multiple operators required by traditional positioning techniques. This improves the overall testing efficiency and allows for changes in the measurement path based on the actual site conditions of skew bridges or other complex bridge types, achieving precise positioning.

[0020] Optionally, a locking component is provided between the rotating shaft and the rotating sleeve, the locking component being used to restrict the rotation between the rotating shaft and the rotating sleeve.

[0021] By adopting the above technical solution, when the rotating shaft rotates to a suitable angle, the locking component can restrict the rotation between the rotating shaft and the rotating sleeve, so that the rotating shaft is fixed at that angle position. This helps to ensure the stability of the measuring component's angle during the measurement process, avoids inaccurate measurement due to accidental rotation of the rotating shaft, and thus achieves accurate measurement and marking of the position of the loaded vehicle in the load test, improves the positioning accuracy and reliability of the positioning device, and also helps to improve the efficiency and accuracy of bridge load tests.

[0022] Optionally, the locking assembly includes a locking ring and a braking ring. The locking ring is coaxially and slidably disposed on the rotating shaft. The rotating sleeve has an annular groove, which is coaxially disposed with the locking ring. The braking ring is disposed in the annular groove. When the locking ring is inserted into the annular groove, the locking ring abuts against the braking ring.

[0023] By adopting the above technical solution, the locking ring can slide coaxially on the rotating shaft. When the locking ring is inserted into the annular groove of the rotating sleeve, the locking ring abuts against the brake ring set in the annular groove, thereby restricting the rotation between the rotating shaft and the rotating sleeve, realizing the locking of the rotation angle of the rotating shaft, so that the measuring component can be kept at a specific angle for accurate measurement, thereby improving the accuracy of vehicle positioning in bridge load tests.

[0024] Optionally, the lower end of the telescopic rod is provided with an anti-slip pad.

[0025] By adopting the above technical solution, an anti-slip pad is installed at the lower end of the telescopic rod, ensuring close contact between the pad and fixed locations such as bridge railings and expansion joints, providing a stable starting point for measurement. When the movable base is pushed to move the device for measurement, the anti-slip pad prevents the telescopic rod from sliding on the contact surface, ensuring the accuracy and stability of the tape measure reading. This guarantees that the precise position of the loaded vehicle can be marked on the bridge surface based on accurate readings, achieving precise positioning of the loaded vehicle in the load test.

[0026] Optionally, the telescopic rod includes a fixed rod, a movable sleeve, and a lead screw. The movable sleeve is slidably sleeved on the fixed rod. One end of the lead screw is threadedly connected to the fixed rod, and the other end of the lead screw is rotatably connected to the movable sleeve and extends out of the movable sleeve. The movable sleeve is connected to the zero mark of the measuring tape.

[0027] By adopting the above technical solution, one end of the lead screw is threadedly connected to the fixed rod, and the other end is rotatably connected to the movable sleeve. When the lead screw is rotated, due to the threaded engagement between the lead screw and the fixed rod, the movable sleeve can slide on the fixed rod, thereby adjusting the length of the telescopic rod. This allows the positioning device to flexibly adapt to the theoretical distances between the theoretical position points of different loaded vehicles and the longitudinal guardrails and transverse expansion joints of the bridge, facilitating rapid marking. Furthermore, the threaded connection between the lead screw and the fixed rod allows for precise control of the telescopic rod's extension and retraction, ensuring positioning accuracy.

[0028] Optionally, the movable base is provided with a limiting protrusion, and the bottom of the telescopic rod is provided with a limiting groove, with the limiting protrusion inserted into the limiting groove.

[0029] By adopting the above technical solution, the cooperation between the limiting protrusion and the limiting groove can limit the telescopic rod, preventing it from shaking during the movement of the moving base, thereby ensuring the stability of the telescopic rod's position.

[0030] Optionally, the rotating assembly is provided in two sets, with the two rotating axes symmetrically arranged on opposite sides of the support and positioning assembly.

[0031] By adopting the above technical solution, two rotating shafts are symmetrically arranged on opposite sides of the support and positioning assembly, allowing the measuring components to be distributed on both sides. When the device is placed at a bridge corner for positioning, the measuring components on both sides can measure the longitudinal and lateral positions of the loaded vehicle, respectively. Combining the characteristic that the rotating assembly can rotate around the support and positioning assembly, the direction of the measuring components can be flexibly adjusted according to the actual site conditions such as the bridge's skew angle, rotating them to a position parallel to the longitudinal and transverse directions of the bridge. This facilitates accurate measurement of the theoretical distance between the theoretical position point of the loaded vehicle and the theoretical distance between the longitudinal guardrail and the transverse expansion joint of the bridge. Furthermore, it allows for simultaneous positioning of the vehicle's longitudinal and lateral positions on the bridge deck, enabling rapid marking and achieving simple, fast, and accurate positioning of the loaded vehicle in load tests. This avoids the problems of traditional positioning techniques requiring repeated measuring, marking, and calibration, as well as positioning deviations caused by the skew angle, thus improving overall test efficiency.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The device is simple and convenient to operate, and can quickly locate the load test vehicle, reducing manpower and time consumption and improving test efficiency;

[0034] 2. The rotating component can rotate around the support positioning component, and can adjust the angle according to the site conditions of complex bridge types such as skew bridges, accurately position the loading vehicle, and reduce the deviation between the actual and theoretical loading positions;

[0035] 3. The measuring component rotates with the rotating component, which can simultaneously locate the longitudinal and lateral positions of the vehicle and mark them with inkjet cartridges to achieve rapid positioning and marking. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of a simple positioning device for loading vehicles in a bridge load test according to an embodiment of this application.

[0037] Figure 2 This is a side view of a simple positioning device for loading vehicles in a bridge load test according to an embodiment of this application.

[0038] Figure 3 It is along Figure 2 A partial structural cross-sectional view of the rotating and locking components of the AA line.

[0039] Figure 4 It is along Figure 2 A partial structural cross-sectional view of the BB line in the middle.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Movable base; 11. Positioning wheel; 12. Inkjet cartridge; 13. Limiting protrusion; 2. Support positioning assembly; 21. Support rod; 22. Disc angle gauge; 3. Rotating assembly; 31. Rotating sleeve; 311. Annular groove; 32. Rotating shaft; 4. Measuring assembly; 41. Measuring tape; 42. Telescopic rod; 421. Fixed rod; 422. Movable sleeve; 423. Lead screw; 43. Anti-slip pad; 44. Limiting groove; 5. Locking assembly; 51. Locking ring; 52. Braking ring. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0043] This application discloses a simple positioning device for a bridge load test loading vehicle.

[0044] It should be noted that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Reference Figure 1 A simplified vehicle positioning device for bridge load testing includes a movable base 1, a support positioning component 2, a rotating component 3, and a measuring component 4. The support positioning component 2 is mounted on the movable base 1, and the rotating component 3 is mounted on the support positioning component 2 and can rotate around it. The support positioning component 2 can position the angle of the rotating component 3. The measuring component 4 is connected to the rotating component 3 and can rotate with it, achieving the effect of simultaneously positioning the longitudinal and lateral positions of the vehicle on the bridge deck and quickly marking them. This allows the rotating component 3 to rotate flexibly to adapt to different bridge types and angles, and the measuring component 4 can accurately measure distances, thus enabling precise vehicle positioning.

[0046] Reference Figure 2 The mobile base 1 is equipped with positioning wheels 11 at its bottom, which are typically made of rubber and are located at the four corners of the bottom. This allows the mobile base 1 to be moved to any position on the bridge surface. An inkjet cartridge 12 is also installed at the bottom of the mobile base 1. When the mobile base 1 moves to a designated position, the inkjet cartridge 12 sprays ink to mark the coordinates of the bridge surface, thus marking the position of the loaded vehicle.

[0047] It should be noted that the specific structure and working principle of the inkjet cartridge 12 are conventional technical means for those skilled in the art, and therefore will not be described in detail in the embodiments of this application.

[0048] Reference Figure 1 The support positioning component 2 includes a support rod 21 and a circular angle gauge 22. The support rod 21 is fixed to the movable base 1. In this embodiment, the support rod 21 is made of aluminum alloy, which is lightweight and high-strength, and is cylindrical.

[0049] The disc angle gauge 22 is installed at the end of the support rod 21 away from the movable base 1. The disc angle gauge 22 has 360° scale markings, so the angle of the rotating component 3 can be accurately determined by the disc angle gauge 22, providing a basis for the accurate measurement of the measuring component 4.

[0050] At least one set of rotating components 3 is provided. In this embodiment, two sets of rotating components 3 are provided. The two sets of rotating components 3 are respectively set on the support rod 21, and the number of measuring components 4 is the same as the number of rotating components 3 and is set one-to-one, so as to facilitate the detection of the horizontal and vertical distances by using the two sets of measuring components 4 respectively.

[0051] The rotating assembly 3 includes a rotating sleeve 31 and a rotating shaft 32. The rotating sleeve 31 is coaxially sleeved on the support rod 21 and can rotate freely 360° around the support rod 21. In this embodiment, the rotating sleeve 31 cannot move along the length of the support rod 21 to ensure stable support of the rotating shaft 32.

[0052] The rotating shaft 32 is made of stainless steel. One end of the rotating shaft 32 is rotatably connected to the rotating sleeve 31 via a bearing to ensure the flexibility of rotation. The other end of the rotating shaft 32 is connected to the measuring component 4, which facilitates the adjustment of the angle of the measuring component 4 to better adapt to the angle requirements of different bridge types. In the initial position, the two rotating shafts 32 are symmetrically arranged.

[0053] Reference Figure 1 and Figure 3 A locking assembly 5 is provided between the rotating shaft 32 and the rotating sleeve 31. The locking assembly 5 includes a locking ring 51 and a braking ring 52. The locking ring 51 is coaxially and slidably disposed on the rotating shaft 32. The rotating sleeve 31 has an annular groove 311, which is coaxial with the locking ring 51. The braking ring 52 is detachably disposed within the annular groove 311. In this embodiment, the braking ring 52 is fixed in the annular groove 311 by bolts.

[0054] In this embodiment, anti-slip textures are provided on the inner circumferential wall of the brake ring 52 and the outer circumferential wall of the locking ring 51, so that when the locking ring 51 is inserted into the ring groove 311, the locking ring 51 abuts against the brake ring 52, thereby facilitating the use of friction to limit the rotation of the rotating shaft 32, so as to ensure the stability of the angle of the rotating shaft 32 during the measurement process and improve the accuracy of the measurement.

[0055] Reference Figure 1 The measuring component 4 includes a measuring tape 41 and a telescopic rod 42. The measuring tape 41 is coaxially nested on the rotating shaft 32 and can rotate with the rotating shaft 32. In this embodiment, the measuring tape 41 is a steel measuring tape with a built-in rotating handle and a locking mechanism to fix the reading position.

[0056] It should be noted that the specific structure of the checkpoint is a conventional technical means for those skilled in the art, and therefore will not be described in detail in the embodiments of this application.

[0057] Reference Figure 1 and Figure 4 The telescopic rod 42 includes a fixed rod 421, a movable sleeve 422, and a lead screw 423. The fixed rod 421 is typically made of stainless steel. The movable sleeve 422 is slidably fitted onto the fixed rod 421 and can slide up and down along the fixed rod 421. The zero-gradient end of the measuring tape 41 is connected to the movable sleeve 422. In this embodiment, both the movable sleeve 422 and the fixed rod 421 have rectangular cross-sections.

[0058] One end of the lead screw 423 is threadedly connected to the fixed rod 421, and the other end is rotatably connected to the movable sleeve 422 and extends out of the movable sleeve 422, so that when the lead screw 423 rotates, it can drive the movable sleeve 422 to move on the fixed rod 421 to adjust the length of the telescopic rod 42.

[0059] Reference Figure 1 An anti-slip pad 43 is fixedly connected to the end of the fixed rod 421 away from the movable sleeve 422. When the anti-slip pad 43 is placed in the fixed position, it is the starting point for the initial reading of the measuring tape 41. At this time, when the movable base 1 moves, the measuring tape 41 will be stretched. At the same time, the anti-slip pad 43 can ensure the stability of the position of the telescopic rod 42 and improve the accuracy of the measurement.

[0060] Reference Figure 1 and Figure 4 A limiting protrusion 13, cylindrical in shape, is fixedly connected to the movable base 1. A limiting groove 44 is formed on the anti-slip pad 43, extending into the fixed rod 421. When the telescopic rod 42 and the anti-slip pad 43 need to be placed on the movable base 1, the limiting protrusion 13 is inserted into the limiting groove 44, thereby facilitating the fixation of the telescopic rod 42 and preventing it from shaking during the movement of the movable base 1.

[0061] In another preferred embodiment, the anti-slip pad 43 may be omitted, and anti-slip texture may be directly provided on the bottom of the fixing rod 421, with the limiting groove 44 provided on the fixing rod 421.

[0062] In another preferred embodiment, a counterweight may be added to the fixed rod 421 to improve the stability of the telescopic rod 42 when it is placed in a fixed position.

[0063] The implementation principle of the simplified positioning device for a bridge load test loading vehicle in this embodiment is as follows: When positioning the bridge load test loading vehicle, first move the movable base 1 to the corner of the bridge, and according to the skew angle of the bridge, rotate the rotating sleeve 31 and the rotating shaft 32. Under the indication of the disc angle ruler 22, rotate one rotating shaft 32 to a position parallel to the longitudinal direction of the bridge, and rotate the other rotating shaft 32 to a position parallel to the transverse direction of the bridge. Then, remove the corresponding transverse telescopic rod 42 and anti-slip pad 43 from the movable base 1 and place them at the bridge expansion joint. Adjust the length of the telescopic rod 42 to a suitable length, and insert the locking ring 51 into the ring groove 311.

[0064] Next, based on the wheel positioning coordinates of the load test vehicle layout diagram, the movable base 1 is moved laterally. At this time, the telescopic rod 42 remains stationary, and the measuring tape 41 is extended until the reading of the measuring tape 41 is the theoretical distance from the bridge expansion joint in the wheel positioning coordinates. Then, the telescopic rod 42 and the anti-slip mat 43 are placed back on the movable base 1, and the corresponding longitudinal telescopic rod 42 and anti-slip mat 43 are removed from the movable base 1 and placed at the bridge railing. The movable base 1 is then moved longitudinally to measure the theoretical distance from the bridge railing in the wheel positioning coordinates.

[0065] Finally, the inkjet cartridge 12 is turned on to spray black ink to mark the coordinate points on the bridge surface. These marked points are the wheel alignment points. The above process is repeated to complete the alignment of the four wheels of the vehicle under load for the load test.

[0066] It should be noted that, in this embodiment, the movement trajectory of the movable base 1 is horizontal, vertical, and horizontal and vertical, forming an overall rectangle. Furthermore, the positioning device in this application has a simple structure and is easy to use and operate. It can achieve simple and rapid positioning of the load test vehicle, and can change the measurement path according to the actual site conditions of skew bridges or other complex bridge types to achieve precise positioning. This solves the problems of low positioning efficiency and inaccurate positioning in the prior art, and improves the efficiency and accuracy of bridge load tests.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A simple positioning device for a bridge load test loading vehicle, characterized in that, Comprising: A mobile base (1), an inkjet cylinder (12) is provided at the bottom of the mobile base (1); A support and positioning component (2), arranged on the mobile base (1); A rotating component (3), arranged on the support and positioning component (2), the rotating component (3) can rotate around the support and positioning component (2), and the support and positioning component (2) is used to position the angle of the rotating component (3); A measuring component (4), connected to the rotating component (3), the measuring component (4) can rotate with the rotating component (3).

2. The simple positioning device for bridge load test loading vehicles according to claim 1, characterized in that: The support and positioning component (2) includes a support rod (21) and a disc protractor (22), the support rod (21) is arranged on the mobile base (1), the disc protractor (22) is arranged on the side of the support rod (21) away from the mobile base (1), and the rotating component (3) is arranged on the support rod (21).

3. The simple positioning device for the bridge load test loading vehicle according to claim 1, characterized in that: At least one group of the rotating components (3) is provided, the rotating component (3) includes a rotating sleeve (31) and a rotating shaft (32), the rotating sleeve (31) is movably sleeved on the support and positioning component (2), one end of the rotating shaft (32) is rotatably connected to the rotating sleeve (31), and the other end of the rotating shaft (32) is connected to the measuring component (4).

4. The simple positioning device for bridge load test loading vehicles according to claim 3, wherein: The measuring component (4) includes a tape measure (41) and a telescopic rod (42), the tape measure (41) is coaxially arranged on the rotating shaft (32), the telescopic rod (42) is placed on the mobile base (1), and the zero scale line end of the tape measure (41) is connected to the telescopic rod (42).

5. The simple positioning device for bridge load test loading vehicles according to claim 4, characterized in that: A locking component (5) is arranged between the rotating shaft (32) and the rotating sleeve (31), and the locking component (5) is used to limit the rotation between the rotating shaft (32) and the rotating sleeve (31).

6. The simple positioning device for the bridge load test loading vehicle according to claim 5, wherein: The locking component (5) includes a locking ring (51) and a braking ring (52), the locking ring (51) is coaxially and slidably arranged on the rotating shaft (32), a ring groove (311) is formed on the rotating sleeve (31), the ring groove (311) is coaxially arranged with the locking ring (51), the braking ring (52) is arranged in the ring groove (311), and when the locking ring (51) is inserted into the ring groove (311), the locking ring (51) abuts against the braking ring (52).

7. The simple positioning device for bridge load test loading vehicles according to claim 4, wherein: An anti-slip pad (43) is provided at the lower end of the telescopic rod (42).

8. The simple positioning device for the bridge load test loading vehicle according to claim 4, characterized in that: The telescopic rod (42) includes a fixed rod (421), a movable sleeve (422) and a screw rod (423), the movable sleeve (422) is slidably sleeved on the fixed rod (421), one end of the screw rod (423) is threadedly connected to the fixed rod (421), the other end of the screw rod (423) is rotatably connected to the movable sleeve (422) and extends out of the movable sleeve (422), and the movable sleeve (422) is connected to the zero scale line end of the tape measure (41).

9. The simple positioning device for bridge load test loading vehicles according to claim 4, characterized in that: A limiting projection (13) is provided on the moving base (1), a limiting groove (44) is formed at the bottom of the telescopic rod (42), and the limiting projection (13) is inserted into the limiting groove (44).

10. The simple positioning device for bridge load test loading vehicles according to claim 3, wherein: Two sets of the rotating components (3) are provided, and the two rotating shafts (32) are symmetrically arranged on opposite sides of the support and positioning component (2).

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