A crane test bed base arrangement for outrigger reaction force measurement

Abstract

The application relates to the technical field of engineering machinery testing, and relates to a crane test bed base device for outrigger reaction force measurement. The device comprises a support platform, a rotary support part arranged above the support platform, a plurality of adjustable outriggers arranged below the support platform, and a pressure collection assembly arranged on the adjustable outriggers; the device further comprises a traction assembly for driving the adjustable outriggers to continuously rotate and a locking part for locking the positions of the adjustable outriggers. The device has the advantages of strong outrigger structure adjusting capacity and good coupling relationship with the pressure sensor; the loading direction of the pressure sensor can be kept highly accurately consistent with the precise sensitive axis of the pressure sensor, so that the accuracy and repeatability of the outrigger reaction force measurement data of the whole crane test bed base device are greatly improved, and the device is suitable for the technical verification of crane equipment with super-high performance index requirements.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery testing technology, specifically to a platform base structure for testing scaled-down crane models, and more particularly to a crane test platform base device for measuring outrigger reaction force. Background Technology

[0002] In the production and R&D of cranes and their related load-bearing structures, measuring the reaction force of their outrigger system is a crucial verification step. In existing technologies, researchers often obtain outrigger reaction force measurement data of scaled-down crane models under different operating postures and slewing conditions through indoor experiments to assess the structural safety margin of real crane products. In the laboratory, the measurement accuracy of the outrigger reaction force of scaled-down crane models highly depends on the accurate simulation of the support boundary conditions during the experiment. Therefore, it is necessary to construct an experimental platform that can realistically reproduce complex working conditions and provide a high-precision, high-reliability mechanical environment for the measurement system.

[0003] Traditional outrigger reaction force measurement techniques involve indirect measurement using external force detection devices (such as separate pressure pads placed under the outriggers or bypass force gauges secured by clamps) on an existing fixed or simple adjustable support frame. This approach is widely used due to its low cost and simple structure, and it can reflect the stress on the outriggers to a certain extent. However, with the increasing demands on crane product performance and quality, these traditional outrigger reaction force measurement techniques are gradually failing to meet the technical verification requirements of products. The measurement path is easily affected by factors such as the installation status of the external force detection device and the distribution of force flow, thus compromising data reliability. Furthermore, it suffers from poor versatility and low deployment efficiency.

[0004] To address the aforementioned shortcomings, existing technologies have incorporated pressure sensors with the outrigger structure (e.g., by directly mounting the pressure sensor at the bottom of the outrigger), optimizing the measurement pathway and significantly improving the reliability of outrigger reaction force measurement data. The crane test bench base device with the aforementioned improved structure meets the research requirements to a certain extent.

[0005] However, the aforementioned improvement scheme still has significant drawbacks, which limit its reliability for technical verification of crane equipment with higher performance requirements. Due to the poor adjustability of the outrigger structure it relies on (e.g., angle discrepancies, asynchronous adjustments, and non-rigid locking) and insufficient coordination with functional modules such as slewing, it is difficult to quickly and stably establish an ideal measurement reference required by the sensor—that is, a rigid force transmission path that is perpendicular to the ground and can maintain high repeatability under various working conditions. Summary of the Invention

[0006] The purpose of this invention is to provide a crane test bench base device for measuring outrigger reaction force. This device has the advantages of strong outrigger structure adjustment capability and good coupling relationship with pressure sensor. It can keep the load direction of pressure sensor consistent with its own precision sensitive axis with high precision, thereby greatly improving the accuracy and repeatability of the outrigger reaction force measurement data of the entire crane test bench base device. It is suitable for technical verification of crane equipment with ultra-high performance requirements.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A crane test bench base device for measuring outrigger reaction force includes a support platform, a slewing support portion disposed above the support platform, a plurality of adjustable outriggers disposed below the support platform, and a pressure acquisition component mounted on the adjustable outriggers; it also includes a traction component for driving the adjustable outriggers to rotate continuously and a locking portion for locking the position of the adjustable outriggers.

[0009] As a preferred embodiment of the present invention, the traction assembly includes a traction support plate disposed on the support platform, a drive rod rotatably mounted on the traction support plate, and a traction wire connecting the drive rod and the adjustable outrigger; the traction wire is used to transmit traction force from the drive rod to the adjustable outrigger.

[0010] As a preferred embodiment of the present invention, each of the drive rods is connected to at least two of the adjustable legs via at least two sets of traction wires; when the drive rod rotates, it drives at least two of the adjustable legs to rotate synchronously.

[0011] As a preferred embodiment of the present invention, the traction assembly further includes a rolling groove disposed on the traction support plate; the drive rod includes a rotary drive head, a rod body connected to the rotary drive head, a plurality of rolling pins passing through the rotary drive head, and rolling elements disposed at the bottom of the rolling pins; when the rotary drive head rotates, it drives the plurality of rolling pins to rotate, and the rolling elements synchronously limit the rolling in the rolling groove.

[0012] As a preferred embodiment of the present invention, the slewing support includes an inner support ring and an outer gear ring rotatably connected to the inner support ring, the outer gear ring being used to drive the crane scale model to rotate; the crane test bench base device for measuring outrigger reaction force also includes a slewing locking part mounted on the support platform and used to lock the rotational position of the outer gear ring.

[0013] As a preferred embodiment of the present invention, the crane test bench base device for measuring outrigger reaction force further includes a rotary drive unit disposed on the support platform for driving the external gear ring to rotate, and a spacing adjustment groove for adjusting the installation position of the rotary drive unit.

[0014] As a preferred embodiment of the present invention, the locking part includes an arc-shaped guide groove disposed on the support platform for providing a rotation track for the adjustable outrigger and a locking member that engages with the arc-shaped guide groove for locking.

[0015] As a preferred embodiment of the present invention, the adjustable support leg includes a support leg body and a support foot disposed at the bottom of the support leg body, the support foot being threadedly connected to the support leg body.

[0016] As a preferred embodiment of the present invention, the pressure acquisition component is disposed at the bottom of the bearing foot and abuts against the upper surface of the external bearing platform.

[0017] As a preferred embodiment of the present invention, the bottom of the bearing foot is provided with a force measuring and limiting cavity for eliminating horizontal loading force, and the pressure acquisition component is installed in the force measuring and limiting cavity.

[0018] In summary, the present invention has the following beneficial effects:

[0019] This device uses a drive rod in the traction assembly to drive the adjustable legs in conjunction with multiple sets of traction wires, enabling continuous adjustment of the leg angles. This structure supports synchronous linkage adjustment of at least two legs, significantly improving the efficiency of switching test conditions and enhancing the angle consistency between the legs.

[0020] This device constructs a rigid force transmission path of "adjust first, then lock", which can significantly improve the accuracy of data measurement. The device uses the arc-shaped guide groove in the locking part to cooperate with the positioning part to achieve precise angle adjustment first and then rigid locking. This design ensures the reliability of angle locking and the clear load path, effectively reducing the wear of the adjustment mechanism under long-term load, and providing a stable mechanical reference for high-precision measurement.

[0021] In this device, the outrigger body and the bearing foot are connected by threads. With the locking part, the height of the outrigger can be precisely adjusted and quickly leveled, thereby establishing a stable and repeatable support boundary condition. At the same time, the slewing locking part can suppress the slight circumferential oscillation of the slewing support part during measurement, ensuring the high reliability of the measurement data under different working conditions.

[0022] By setting a spacing adjustment groove on the support platform, the center distance of the installation position of the rotary drive unit that drives the external gear ring can be adjusted, thereby flexibly adapting to different modules or specifications of drive gears. When changing the test model, there is no need to make large-scale changes to the base structure, which significantly reduces the difficulty of equipment modification and long-term maintenance costs.

[0023] The support feet of this device are equipped with force limiting cavities at the bottom for installing pressure acquisition components. These cavities can effectively shield or eliminate lateral force interference in the horizontal direction, ensuring that the pressure sensor always operates under vertical pressure. This not only improves the accuracy of leg reaction force measurement under complex working conditions, but also reduces the risk of sensor damage due to off-center loading. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the base device of this test bench;

[0026] Figure 2 This is a side view of the base assembly of this test bench;

[0027] Figure 3 This is a schematic diagram of the traction assembly.

[0028] Figure 4 This is a schematic diagram of the locking part and the rotary drive part.

[0029] Figure 5 This is a schematic diagram of the rolling pin structure;

[0030] Figure 6 This is a schematic diagram of the adjustable outriggers.

[0031] In the diagram: 1. Support platform; 2. Rotary support unit; 21. Inner support ring; 22. Outer gear ring; 3. Adjustable outrigger; 31. Outrigger body; 32. Bearing foot; 4. Pressure acquisition component; 5. Traction component; 51. Traction support plate; 52. Drive rod; 521. Rotary drive head; 522. Rod body; 523. Rolling pin; 524. Rolling element; 53. Traction wire; 54. Rolling groove; 6. Locking part; 61. Arc-shaped guide groove; 62. Positioning piece; 7. Rotary locking part; 8. Rotary drive unit; 9. Spacing adjustment groove. Detailed Implementation

[0032] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. The function and arrangement of the elements discussed may be changed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the various examples. For example, the described methods may be performed in a different order than described, and steps may be added, omitted, or combined. Furthermore, features described in some examples may be combined in other examples.

[0033] The test bench base of this embodiment includes a support platform 1, a rotary support 2 disposed above the support platform 1, a plurality of adjustable legs 3 disposed below the support platform 1, and a pressure acquisition component 4 mounted on the adjustable legs 3; it also includes a traction component 5 for driving the adjustable legs 3 to rotate continuously and a locking part 6 for locking the position of the adjustable legs 3.

[0034] In this embodiment, as Figure 1 and Figure 2 As shown, the support platform 1 is preferably configured as a plate-type load-bearing structure, more specifically, it is a metal plate or frame structure with sufficient rigidity, and its lower surface is provided with reinforcing ribs or thickened areas to meet the stability requirements of test load and reaction force measurement. Multiple adjustable legs 3 are distributed along the periphery of the support platform 1 to form multi-point support for the support platform 1; the specific number of adjustable legs 3 can be selected according to application requirements. In scenarios requiring high stability and symmetrical support, four legs can be arranged symmetrically (this arrangement is a conventional preferred method and does not constitute a limitation of the present invention).

[0035] The support platform 1 is equipped with a slewing support part 2. The slewing support part 2 adopts a slewing bearing structure, including an inner support ring 21, an outer gear ring 22 and the balls between them. The outer gear ring 22 can drive the rotation of the scaled crane model by meshing with the drive gear of the slewing drive part 8, so as to meet the experimental data collection needs under different working postures and slewing conditions.

[0036] To ensure the stability of boundary conditions during the test measurement, a rotation locking part 7 is provided on the support platform 1. This part is used to prevent or lock the rotation of the rotation support part 2. The rotation locking part 7 can be implemented based on a locking pin, a brake pin, a wedge-type anti-rotation component, or a clamping brake component. Preferably, the rotation locking part 7 is implemented based on a wedge or clamping component. By wedge-tightening or clamping, a locking constraint is formed between the movable part (external gear ring 22) of the rotation support part 2 and the support platform 1. This locks the rotational degree of freedom when it is necessary to measure the reaction force of the outriggers or maintain the platform posture, which can suppress the interference of micro-rotation on the measurement results and thus optimize the ideal measurement reference required by the sensor. In addition, the rotation locking part 7 can also be implemented based on an adjustable clamping component structure. Its end contacts the external gear ring 22, and the friction braking torque is generated by the clamping force to prevent rotation. This method is easy to release quickly.

[0037] The upper ends of each adjustable outrigger 3 are mounted on the support platform 1 by a rotatable connection, so that the adjustable outrigger 3 can rotate relative to the support platform 1 around its respective hinge axis, thereby realizing continuous adjustment of the outrigger angle within a certain range.

[0038] Furthermore, to achieve continuous angle adjustment capability, a traction component 5 is installed on the support platform 1. For example... Figure 3 and Figure 5 As shown, the traction assembly 5 includes a traction support plate 51 disposed on the support platform 1, a drive rod 52 rotatably mounted on the traction support plate 51, and a traction wire 53 connecting the drive rod 52 and the adjustable outrigger 3. The traction wire 53 is used to transmit traction force from the drive rod 52 to the adjustable outrigger 3. The traction assembly 5 also includes a rolling groove 54 disposed on the traction support plate 51. The drive rod 52 includes a rotary drive head 521, a rod body 522 connected to the rotary drive head 521, a plurality of rolling pins 523 passing through the rotary drive head 521, and rolling elements 524 disposed at the bottom of the rolling pins 523. When the rotary drive head 521 rotates, it drives the plurality of rolling pins 523 to rotate, and the rolling elements 524 synchronously limit the rolling in the rolling groove 54.

[0039] Specifically, the traction support plate 51 is fixedly connected to the support platform 1 and can serve as the mounting base and load transmission component of the traction structure; the drive rod 52 can be a component with a gear disk or equivalent transmission part, which can rotate under the action of external force (e.g., driven by manual operation, crank drive or other power input), and converts the rotation into displacement output on the rolling pin 523. The rolling pin 523 is fixed to the rotary drive head 521 by a locking sleeve. When the rotary drive head 521 rotates, it drives the rolling pin 523 to rotate synchronously. The bottom of the rolling pin 523... The rolling element 524 slides in the rolling groove 54 on the traction support plate 51 (which reduces frictional resistance and improves adjustment smoothness); the rotary drive head 521 is integrally connected to the rod body 522, and the rod body 522 is provided with an interface for threading the fixed traction wire 53. When the rod body 522 rotates (at this time, the rolling pin 523 moves along a predetermined trajectory under the constraint of the rolling groove 54), it applies linear displacement or tension displacement to the traction component. The other end of the traction wire 53 is bound to the adjustable support leg 3, thereby realizing the synchronous push / pull movement of the adjustable support leg 3. With the above structure, the traction assembly 5 can achieve controllable tension with a small operating force, thereby realizing continuous adjustment of the angle of the adjustable support leg 3; and since the angle locking of the adjustable support leg 3 is undertaken by the locking part 6 structure, the traction assembly 5 mainly works in the adjustment stage, thereby reducing its long-term load requirements and contributing to structural lightweighting and lifespan improvement.

[0040] After the outrigger angle is adjusted to the target angle, a locking part 6 is further provided on the support platform 1 to achieve reliable load bearing and long-term stable support. For example... Figure 4 As shown, the locking part 6 includes an arc-shaped guide groove 61 provided on the support platform 1 for providing a rotational track for the adjustable outrigger 3, and a locking member 62 that engages with the arc-shaped guide groove 61 for locking. The arc-shaped guide groove 61 matches the angle change of the adjustable outrigger 3, and its specific structural form can be an arc-shaped through groove or an arc-shaped hole. The locking member 62 can be based on a locking screw or pin, used to insert into the arc-shaped guide groove 61 to limit and lock the adjustable outrigger 3. When the adjustable outrigger 3 reaches its target angle, the locking member 62 clamps the connecting part of the adjustable outrigger 3 to the support platform 1, thereby fixing the outrigger angle at the target angle. This "adjust angle first, then lock" linkage decouples the angle adjustment function from the long-term locking and load-bearing function, allowing the traction component 5 to be used only for adjustment and positioning, while the locking part 6 is used for load-bearing locking. This improves locking reliability and reduces the risk of wear and deformation of the traction mechanism under long-term loads.

[0041] After the outrigger angle is adjusted to the correct position and locked in place, the outrigger height and working condition leveling need to be adjusted. The adjustable outrigger 3 includes an outrigger body 31 and a bearing foot 32 located at the bottom of the outrigger body 31. The bearing foot 32 is threadedly connected to the outrigger body 31.

[0042] Specifically, such as Figure 6As shown, the bearing foot 32 is provided with multiple rotating parts, which can apply torque to the threaded pair, thereby realizing the height adjustment of the bearing foot 32. The rotating parts can be in the form of a horizontal plug handle, a detachable crank, or an integrated handle, etc., so as to quickly level on site. Moreover, the above-mentioned handle setting is based on torque control, which can realize high-precision continuous height adjustment, greatly improving the leveling accuracy of this device.

[0043] like Figure 2 As shown, in this embodiment, the pressure acquisition component 4 is located at the bottom of the support foot 32 and abuts against the upper surface of the external support platform. It can be implemented using a force sensor, pressure sensor, or load cell. A force-measuring limiting cavity for eliminating horizontal loading forces is provided at the bottom of the support foot 32, and the pressure acquisition component 4 is installed within this cavity. This design improves the accuracy and repeatability of the outrigger reaction force measurement. When the pressure acquisition component 4 is positioned between the support foot 32 and the external support platform, the force-measuring limiting cavity (e.g., an annular limiting ring, coaxial guide sleeve, or positioning step) acts as a vertical guiding structure, allowing the sensor force to be transmitted along the vertical axis as much as possible, thereby eliminating measurement errors caused by horizontal force components. Furthermore, the signal line of the pressure acquisition component 4 can be shielded and properly routed to reduce signal noise caused by vibration or electromagnetic interference; the data acquisition module can be equipped with zero-point calibration and temperature drift compensation functions to improve data stability.

[0044] like Figure 4 As shown, the device also includes a rotary drive unit 8 mounted on the support platform 1 for driving the external gear ring 22 to rotate, and a spacing adjustment groove 9 for adjusting the mounting position of the rotary drive unit 8. To achieve rotary drive, the rotary drive unit 8 includes a drive gear meshing with the gear ring and a hydraulic motor for driving the drive gear. The output end of the hydraulic motor is connected to the drive gear (either directly or through a reduction mechanism), thereby driving the drive gear to rotate and driving the rotary support unit 2 to rotate. To accommodate drive gears with different modules (e.g., ensuring correct meshing with the gear ring when replacing drive gears with different modules or tooth counts), the support platform 1 is equipped with a spacing adjustment groove 9 for mounting a hydraulic motor. The spacing adjustment groove 9 is preferably an elongated through-slot or oblong hole extending along the direction of the drive gear towards the center distance of the inner support ring 21. This allows the hydraulic motor to adjust its installation position within the range defined by the spacing adjustment groove 9, thereby changing the center distance between the drive gear and the inner support ring 21, enabling rapid installation and adaptation for drive gears with different modules. This design avoids the need for reprocessing or replacing the mounting base due to a fixed center distance, significantly improving the versatility and ease of maintenance of the test platform. To improve positioning accuracy and resistance to loosening, positioning lines, positioning hole groups, or stop surfaces can be provided on both sides of the spacing adjustment groove 9, or a reinforcing plate can be provided below the adjustment groove to reduce the risk of local deformation in the area of ​​the spacing adjustment groove 9 during repeated adjustments and load-bearing processes.

[0045] In another possible implementation, the traction wire 53 can also be connected to the locking sleeve for fixing the rolling pin 523. More specifically, the end of the traction wire 53 can be provided with an annular end, a crimping end, a clamping end, or an equivalent connecting end, and form a reliable connection with the rolling pin 523 through the locking bolt of the locking sleeve, so that the displacement output of the rolling pin 523 directly acts on the traction wire 53, thereby reducing the connection gap and improving the transmission stiffness.

[0046] In another possible implementation, to further improve adjustment efficiency and enhance the consistency of the adjustable outrigger angles 3, each drive rod 52 is connected to at least two adjustable outriggers 3 via at least two sets of traction wires 53; when the drive rod 52 rotates, it drives at least two adjustable outriggers 3 to rotate synchronously. The two sets of traction wires 53 are arranged circumferentially or diagonally along the support platform 1 to apply a coordinated traction force to at least two outriggers under the output of the traction assembly 5, driving the outriggers to rotate around their hinge axes. The traction wires 53 can be implemented using steel wire ropes, cables, chains, or flexible belts, preferably steel wire ropes or cables, to balance flexible arrangement and high tensile strength; the traction wires 53 are threaded or connected through through holes, connecting rods, or pre-set guide holes on the adjustable outriggers 3 to form a traction circuit for the coordinated adjustment of the outrigger angles.

[0047] In another possible implementation, the locking part 6 can be a screw-clamping locking mechanism. The locking screw passes through the arc-shaped guide groove 61 and engages with the connecting part of the adjustable leg 3. Angle locking is achieved through the clamping force generated by the screw preload. To improve resistance to loosening, a spring washer, a self-locking nut, or a double nut structure can be provided at the locking screw. Alternatively, the locking part 6 can also be a pin-positioning locking mechanism, with multiple positioning holes (which can be a group of holes or...) provided within the angle adjustment range of the adjustable leg 3. The adjustable outrigger 3 has a toothed positioning groove. When the angle of the adjustable outrigger 3 is adjusted to the target position, a locking pin is inserted to achieve angle positioning and locking. This method has the advantage of high on-site operation efficiency. In addition, the specific implementation structure of the locking part 6 can also assist in locking with the clamping plate / pressure plate. A clamping plate or pressure plate is set in the area of ​​the arc-shaped guide groove 61 so that when the locking part 62 is tightened, a clamping force is applied to a larger contact area, thereby reducing local contact stress and improving locking stability. The clamping plate can form a surface-to-surface contact fit with the outrigger connection to reduce the tendency to slip. With the above structure, the outrigger angle can form a rigid lock after adjustment, and the lock bears the main load-bearing function of the outrigger angle, so that the traction component 5 does not have to bear the load for a long time after locking, thereby improving the overall reliability of the machine.

[0048] Based on the above structure, the typical test / measurement condition establishment process of this invention is as follows:

[0049] First, according to the experimental requirements, the slewing locking part 7 is locked to suppress the rotational freedom of the slewing support part 2; if rotational positioning is required first, the lock is released first, the slewing support part 2 is driven to rotate to the target position and then locked again.

[0050] Next, release the locking part 62 of the locking part 6 so that the adjustable support leg 3 can be freely adjusted in angle in the arc-shaped guide groove 61;

[0051] Next, the two sets of traction components 5 on the support platform 1 are operated respectively to apply traction to the adjustable outriggers 3 through the traction circuit, driving the adjustable outriggers 3 to rotate continuously and adjust to the target angle.

[0052] Next, the adjustable outrigger 3 is rigidly locked at the target angle using the locking component 62 to establish a stable geometric boundary;

[0053] Then, by adjusting the height of each adjustable leg 3 through the threaded structure between the bearing foot 32 and the leg body 31, the support platform 1 is leveled and each bearing foot 32 is reliably in contact with the ground to form a stable force boundary.

[0054] Finally, data acquisition is performed, collecting the data output by the pressure acquisition component 4 on each adjustable outrigger 3 to obtain outrigger reaction force data under different adjustable outrigger 3 angles and / or different adjustable outrigger 3 heights, thus completing the measurement.

[0055] In summary, this device, through the technical means of "continuous angle adjustment - locking - thread leveling - reaction force measurement", ensures that the load direction of the pressure sensor is consistent with its own precision sensitive axis with high accuracy, thereby greatly improving the accuracy and repeatability of the reaction force measurement data of the entire crane test bench base device. It is suitable for the technical verification of crane equipment with ultra-high performance requirements.

[0056] Several embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A crane test bench base device for measuring outrigger reaction force, comprising a support platform (1), characterized in that, It also includes a slewing support (2) disposed above the support platform (1), a plurality of adjustable outriggers (3) disposed below the support platform (1), and a pressure acquisition assembly (4) mounted on the adjustable outriggers (3); it also includes a traction assembly (5) for driving the adjustable outriggers (3) to rotate continuously and a locking part (6) for locking the position of the adjustable outriggers (3).

2. The crane test bench base device for measuring outrigger reaction force according to claim 1, characterized in that, The traction assembly (5) includes a traction support plate (51) disposed on the support platform (1), a drive rod (52) rotatably mounted on the traction support plate (51), and a traction wire (53) connecting the drive rod (52) and the adjustable outrigger (3); the traction wire (53) is used to transmit traction force from the drive rod (52) to the adjustable outrigger (3).

3. A crane test bench base device for measuring outrigger reaction force according to claim 2, characterized in that, Each of the drive rods (52) is connected to at least two of the adjustable legs (3) via at least two sets of traction wires (53); when the drive rod (52) rotates, it drives at least two of the adjustable legs (3) to rotate synchronously.

4. A crane test bench base device for measuring outrigger reaction force according to claim 2, characterized in that, The traction assembly (5) further includes a rolling groove (54) disposed on the traction support plate (51); the drive rod (52) includes a rotary drive head (521), a rod body (522) connected to the rotary drive head (521), a plurality of rolling pins (523) passing through the rotary drive head (521), and rolling elements (524) disposed at the bottom of the rolling pins (523); when the rotary drive head (521) rotates, it drives the plurality of rolling pins (523) to rotate, and the rolling elements (524) synchronously limit the rolling in the rolling groove (54).

5. A crane test bench base device for measuring outrigger reaction force according to claim 1, characterized in that, The slewing support (2) includes an inner support ring (21) and an outer gear ring (22) rotatably connected to the inner support ring (21). The outer gear ring (22) is used to drive the crane scale model to rotate. The crane test bench base device for measuring outrigger reaction force also includes a slewing lock (7) installed on the support platform (1) and used to lock the rotation position of the outer gear ring (22).

6. A crane test bench base device for measuring outrigger reaction force according to claim 5, characterized in that, The crane test bench base device for measuring outrigger reaction force also includes a rotary drive unit (8) disposed on the support platform (1) for driving the external gear ring (22) to rotate, and a spacing adjustment groove (9) for adjusting the installation position of the rotary drive unit (8).

7. A crane test bench base device for measuring outrigger reaction force according to claim 1, characterized in that, The locking part (6) includes an arc-shaped guide groove (61) provided on the support platform (1) for providing a rotation track for the adjustable outrigger (3) and a locking member (62) that cooperates with the arc-shaped guide groove (61) for locking.

8. A crane test bench base device for measuring outrigger reaction force according to claim 1, characterized in that, The adjustable support leg (3) includes a support leg body (31) and a support foot (32) disposed at the bottom of the support leg body (31), the support foot (32) being threadedly connected to the support leg body (31).

9. A crane test bench base device for measuring outrigger reaction force according to claim 8, characterized in that, The pressure acquisition component (4) is located at the bottom of the bearing foot (32) and is in contact with the upper surface of the external bearing platform.

10. A crane test bench base device for measuring outrigger reaction force according to claim 9, characterized in that, The bottom of the bearing foot (32) is provided with a force measuring and limiting cavity for eliminating horizontal loading force, and the pressure acquisition component (4) is installed in the force measuring and limiting cavity.

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