A reconfigurable vehicle frame connection torsional rigidity test bench

Abstract

The application belongs to the technical field of reconfigurable vehicle, and discloses a reconfigurable vehicle frame connection torsional rigidity test bench. A balance lever mechanism (A14) is arranged at the front of a main bench moving base (A1) of a main bench (A), a main bench fixed support base (A3) is arranged at the rear of the main bench moving base (A1), the middle part of the balance lever mechanism (A14) is movably hinged to the front of the main bench moving base (A1), the side part of the balance lever mechanism (A14) is connected to the main bench moving base (A1) through an electric push cylinder (A4), a displacement sensor (A6) is arranged on the electric push cylinder (A4), and a torque sensor (A5) is arranged between a main bench rotating base (A7) and a main bench fish-eye joint shaft (A8). The reconfigurable vehicle frame connection torsional rigidity test bench has the advantages of simple structure, convenient and reliable realization of the connection torsional rigidity test of the reconfigurable vehicle frame, and guarantee of the corresponding test actions of different reconfigurable vehicle frames, and can meet the special requirements of the reconfigurable vehicle frame test.

Description

Technical Field

[0001] This invention belongs to the field of reconfigurable vehicle technology, and more specifically, relates to a test bench for the torsional stiffness of a reconfigurable vehicle frame connection. Background Technology

[0002] Reconfigurable modular vehicles (reconfigurable vehicles), capable of autonomous reconfiguration, assembly, and disassembly, represent a disruptive and innovative technology and have become an urgent need for the development of killer weapons for land, air, and sea. Due to the complexity of the land environment, the development of self-reconfigurable ground-based transport equipment is extremely difficult and is a globally recognized major challenge. Self-reconfiguration technology will make self-reconfigurable land-based equipment a reality. Modular vehicles consist of single-axle, single-body modules, which can be reassembled into various vehicle types such as 4×4, 6×6, and 8×8. The lengths of the reconfigured vehicle types differ, requiring the development of a special test bench for the torsional stiffness of the reconfigurable vehicle frame connection to verify the overall rigidity of the modularly reconfigured vehicle frame. However, no such test bench exists in current technology.

[0003] Existing technology includes a device and test bench for testing the torsional stiffness of a body-in-white, with publication number CN106706330B. This device comprises a test bench, a torsion beam, a front support column, and a column connecting beam. The test bench is fixedly mounted on a workbench; the torsion beam is mounted on the test bench and rotatably connected to it; the front support column is mounted parallel to the torsion beam via a column base, and is rotatably connected to the column base; the column connecting beam is parallel to the torsion beam, mounted on the front support column, and rotatably connected to both the front support column and the test bench. This invention enables pure torsion testing of the body, ensuring the body's rotation center remains constant, making the body's torsion center collinear with the torsion beam's torsion center, ensuring the front support column moves vertically and parallel to each other, and maintaining a parallel and fixed loading direction, thus guaranteeing the accuracy of the torsion test. This technology does not involve the reconfigurable vehicle of this application, and therefore does not address the technical issues and solutions of this application. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a reconfigurable vehicle frame connection torsional stiffness test bench that is simple in structure, can conveniently and reliably realize the connection torsional stiffness test of reconfigurable vehicle frames, ensures that different reconfigurable vehicle frames complete the corresponding test actions, meets the special requirements of reconfigurable vehicle frame testing, realizes automatic detection, storage, analysis and transmission of data, improves the degree of automation, and has high versatility.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] This invention relates to a reconfigurable vehicle frame connection torsional stiffness testing bench. A main bench and a secondary bench are arranged on guide rails. A balance bar mechanism is installed at the front of the main bench's movable base, and a fixed support base is installed at the rear of the main bench's movable base. The balance bar mechanism is hinged in the middle to the front of the main bench's movable base. The side of the balance bar mechanism is connected to the main bench's movable base via an electric cylinder, on which a displacement sensor is installed. The upper part of the balance bar mechanism is connected to the main bench's fisheye joint via a main bench rotating seat. A torque sensor is installed between the shaft, the main frame rotary seat, and the main frame fisheye joint shaft. A main frame locking stud is installed on the main frame fisheye joint shaft. The main frame fisheye joint shaft is installed on the main frame fixed support seat. The main frame locking stud is installed on the main frame fisheye joint shaft. A secondary frame fixed support seat is installed at the front and rear of the secondary frame. A secondary frame rotary seat or threaded jack is installed on the secondary frame fixed support seat. A secondary frame locking stud is installed on the secondary frame fisheye joint shaft connected to the secondary frame rotary seat.

[0007] The balance bar mechanism includes a mechanism connecting seat and a balance bar. The side of the balance bar is connected to the main frame moving base via an electric push cylinder. A displacement sensor is installed on the electric push cylinder. The upper part of each side of the balance bar is connected to the main frame rotating seat via the main frame connecting seat.

[0008] Each side of the front of the sub-platform is provided with a sub-platform fixed support seat, and each side of the rear of the sub-platform is provided with a sub-platform fixed support seat. Threaded jacks are provided on the two sub-platform fixed support seats at the front of the sub-platform, and sub-platform rotating seats are provided on the two sub-platform fixed support seats at the rear of the sub-platform. Sub-platform locking studs are provided on the sub-platform fisheye joint shaft connected to each sub-platform rotating seat.

[0009] Each side of the bottom of the main frame is provided with a main frame base pad, and each main frame base pad is connected to a main frame slider. The main frame slider is movably engaged with the guide rail, and a stop seat is provided on the guide rail.

[0010] Each side of the bottom of the auxiliary platform is provided with a base plate, and each base plate is connected to a slider. The slider is movably engaged with the guide rail.

[0011] The electric cylinder, displacement sensor, and torque sensor are respectively connected to the control box and the host computer assembly.

[0012] The reconfigurable vehicle frame is configured to be connected to the main frame. When the reconfigurable vehicle frame is connected to the main frame, the front of the reconfigurable vehicle frame is fixed by a main frame locking stud on each side, and the rear of the reconfigurable vehicle frame is fixed by a main frame locking stud on each side.

[0013] The reconfigurable vehicle frame is configured to be connected to the subframe. When the reconfigurable vehicle frame is connected to the subframe, the front of the reconfigurable vehicle frame is supported by threaded jacks on each side, and the rear of the reconfigurable vehicle frame is fixed by subframe locking studs on each side.

[0014] After the reconfigurable vehicle frame is connected to the main frame, the two main frame locking studs at the rear of the main frame are set to be loosened; after the reconfigurable vehicle frame is connected to the auxiliary frame, the threaded jack at the front of the auxiliary frame and the reconfigurable vehicle frame are set to be in a suspended state.

[0015] The reconfigurable vehicle frame connection torsional stiffness test bench includes a main bench and multiple auxiliary benches. Multiple reconfigurable vehicle frames are used for torsional stiffness testing, with one reconfigurable vehicle frame arranged on each bench.

[0016] The working principle and beneficial effects of the technical solution adopted in this invention are as follows:

[0017] The reconfigurable vehicle frame connection torsional stiffness test bench of this invention comprises a main bench and sub-bench, which have different structures. One main bench is used, while multiple sub-bench can be used. Before testing, a corresponding reconfigurable vehicle frame is connected to both the main bench and the sub-bench. The main bench and the sub-bench closest to it need to be connected, as do adjacent sub-bench. When the corresponding reconfigurable vehicle frame E is connected to the main bench, each side of the front portion of the reconfigurable vehicle frame is fixed with a main bench locking stud, and each side of the rear portion is fixed with a main bench locking stud. When the corresponding reconfigurable vehicle frame is connected to the sub-bench, each side of the front portion of the reconfigurable vehicle frame E is supported by a threaded jack, and each side of the rear portion is fixed with a sub-bench locking stud. Subsequently, the two main platform locking studs at the rear of the main platform are set to a loosened structure; the two threaded jacks at the front of the auxiliary platform and the reconfigurable vehicle frame are set to a suspended state. Thus, when the power to the control box and the host computer assembly is turned on, the electric push cylinder drives the balance bar to swing. With the balance bar connected to the front of the reconfigurable vehicle frame and the rear of the reconfigurable vehicle frame unrestrained, and the front of the auxiliary platform unrestrained, the reconfigurable vehicle frames on the main platform and the auxiliary platform can achieve swinging and torsional movements. Torque sensors and displacement sensors detect the corresponding data of the reconfigurable vehicle frame on the main platform, and the corresponding data is input to the control box and the host computer assembly. The conclusions are displayed on the host computer, and the data is saved. The host computer supports multiple sets of data storage, comparison analysis, and output. Attached Figure Description

[0018] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0019] Figure 1 This is a schematic diagram of the main structure of the reconfigurable vehicle frame connection torsional stiffness test bench according to the present invention.

[0020] Figure 2 This is a top view of the reconfigurable vehicle frame connection torsional stiffness test bench described in this invention.

[0021] Figure 3 This is a schematic diagram of the axial view of the reconfigurable vehicle frame connection torsional stiffness test bench according to the present invention.

[0022] Figure 4 This is a schematic diagram of the main frame of the reconfigurable vehicle frame connection torsional stiffness test bench described in this invention.

[0023] Figure 5 This is a schematic diagram of the sub-bench of the reconfigurable vehicle frame connection torsional stiffness test bench according to the present invention.

[0024] The labels in the attached diagram are as follows:

[0025] A. Main frame; B. Sub-frame; C. Guide rail; D. Stop seat; E. Reconfigurable vehicle frame;

[0026] A1. Main frame movable base; A2. Balance bar; A3. Main frame fixed support; A4. Electric push cylinder; A5. Torque sensor; A6. Displacement sensor; A7. Main frame rotating base; A8. Main frame fisheye joint shaft; A9. Main frame locking stud; A10. Control box and host computer assembly; A11. Main frame base pad; A13. Mechanism connecting seat; A14. Balance bar mechanism; A15. Main frame connecting seat;

[0027] B1. Sub-bench fixed support base; B2. Sub-bench fixed support base; B3. Sub-bench rotating base; B4. Sub-bench fisheye joint shaft; B5. Threaded jack; B6. Sub-bench locking stud; B7. Sliding handle; B9. Sub-bench base plate brake; B10. Sub-bench base pad. Detailed Implementation

[0028] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0029] As attached Figure 1 - Appendix Figure 5As shown, this invention is a reconfigurable vehicle frame connection torsional stiffness test bench. A main bench A and a secondary bench B are arranged on guide rail C. A balance bar mechanism A14 is installed at the front of the main bench movable base A1 of the main bench A, and a main bench fixed support A3 is installed at the rear of the main bench movable base A1. The balance bar mechanism A14 is movably hinged to the front of the main bench movable base A1 in the middle. The side of the balance bar mechanism A14 is connected to the main bench movable base A1 via an electric push cylinder A4. A displacement sensor A6 is installed on the electric push cylinder A4. The upper part of the balance bar mechanism A14 is connected to the main bench fisheye joint via a main bench rotating seat A7. A torque sensor A5 is installed between the main frame rotating seat A7 and the main frame fisheye joint shaft A8. A main frame locking stud A9 is installed on the main frame fisheye joint shaft A8. The main frame fisheye joint shaft A8 is installed on the main frame fixed support A3. The main frame fisheye joint shaft A8 is also installed on the main frame fisheye joint shaft A8. The auxiliary frame fixed support B2 is installed at the front and rear of the auxiliary frame B. The auxiliary frame rotating seat B3 or threaded jack B5 is installed on the auxiliary frame fixed support B2. The auxiliary frame locking stud B6 is installed on the auxiliary frame fisheye joint shaft B4 connected to the auxiliary frame rotating seat B3. To address the shortcomings of the existing technology, an improved technical solution is proposed. In this structural design, a main frame A and an auxiliary frame B are set up. The main frame A and auxiliary frame B have different structures. One main frame A is set up, while multiple auxiliary frames B can be set up. Before the test, a corresponding reconfigurable vehicle frame E is connected to the main test bench A and the auxiliary test bench B respectively. The main test bench A and the auxiliary test bench B closest to it need to be connected, and adjacent auxiliary test benches B also need to be connected. When the corresponding reconfigurable vehicle frame E is connected to the main test bench A, each side of the front of the reconfigurable vehicle frame E is fixed by a main test bench locking stud A9, and each side of the rear of the reconfigurable vehicle frame E is fixed by a main test bench locking stud A9. When the corresponding reconfigurable vehicle frame E is connected to the auxiliary test bench B, each side of the front of the reconfigurable vehicle frame E is supported by a threaded jack B5, and each side of the rear of the reconfigurable vehicle frame E is fixed by an auxiliary test bench locking stud B6. Then, the two main test bench locking studs A9 at the rear of the main test bench A are set to a loosened configuration; the two threaded jacks B5 at the front of the auxiliary test bench B and the reconfigurable vehicle frame E are set to a suspended configuration. In this way, the power supply to the control box and the host computer component A10 is turned on, and the electric push cylinder A4 drives the balance bar A2 to swing. Since the front of the reconfigurable vehicle frame E is connected to the balance bar A2, and the rear of the reconfigurable vehicle frame E is in an unconstrained state, and the front of the auxiliary platform B is also unconstrained, the reconfigurable vehicle frame E on the main platform A and the reconfigurable vehicle frame E on the auxiliary platform B can achieve swinging and torsional movements. The torque sensor A5 and the displacement sensor A6 detect the corresponding data of the reconfigurable vehicle frame E on the main platform A. The corresponding data is input to the control box and the host computer component. The conclusions are displayed on the host computer and the data is saved. The host computer supports the storage, comparison and analysis, and output of multiple sets of data.The reconfigurable vehicle frame connection torsional stiffness test bench of the present invention has a simple structure, which can conveniently and reliably realize the connection torsional stiffness test of reconfigurable vehicle frames, and ensure that different reconfigurable vehicle frames complete the corresponding test actions, meet the special requirements of reconfigurable vehicle frame testing, realize automatic detection, storage, analysis and transmission of data, improve the degree of automation, and has high versatility.

[0030] The stabilizer bar mechanism A14 includes a mechanism connecting seat A13 and a stabilizer bar A2. The side of the stabilizer bar A2 is connected to the main frame moving base A1 via an electric push cylinder A4. A displacement sensor A6 is installed on the electric push cylinder A4. The upper part of each side of the stabilizer bar A2 is connected to the main frame rotating base A7 via the main frame connecting seat A15. In the above structure, the mechanism connecting seat A13 and the stabilizer bar A2 are an integral structure in an inverted T-shape. The mechanism connecting seat A13 realizes the movable connection between the stabilizer bar A2 and the main frame moving base A1. Under the extension and retraction of the electric push rod A4, the stabilizer bar A2 will swing. The stabilizer bar A2 will reciprocate up and down on both sides, causing the reconfigurable vehicle frame E on the main frame A to swing. When the reconfigurable vehicle frame E on the main frame A swings, it will drive the reconfigurable vehicle frame E on the auxiliary frame B. In this way, a torsional action occurs between the main frame A and the auxiliary frame B connected to the main frame A, reliably completing the torsional stiffness test of the reconfigurable vehicle frame connection. The test bench of this invention is applicable to various reconfigurable vehicle frames, exhibiting high versatility. The electric actuators A4 can also be installed on both sides, in which case the extension and retraction states of the two electric actuators are completely opposite.

[0031] The sub-bench B is provided with a sub-bench fixed support seat B2 on each side of its front portion and a sub-bench fixed support seat B2 on each side of its rear portion. Threaded jacks B5 are installed on the two front sub-bench fixed support seats B2, and sub-bench rotating seats B3 are installed on the two rear sub-bench fixed support seats B2. A sub-bench locking stud B6 is installed on the sub-bench fisheye joint shaft B4 connected to each sub-bench rotating seat B3. This sub-bench structure allows for the installation of a reconfigurable vehicle frame E. The reconfigurable vehicle frame E is connected to the rear of the sub-bench B, and the front of the threaded jacks will not contact the reconfigurable vehicle frame E during testing, ensuring that the reconfigurable vehicle frame E has sufficient swing space. This facilitates and reliably completes the torsional stiffness test of the frame.

[0032] The main test bench A has a main test bench base plate A11 on each side of its bottom. Each main test bench base plate A11 is connected to a main test bench slider A, which is movably engaged with a guide rail C. A stop seat D is provided on the guide rail C. The auxiliary test bench B has an auxiliary test bench base plate B10 on each side of its bottom. Each auxiliary test bench base plate B10 is connected to an auxiliary test bench slider, which is movably engaged with a guide rail C. This structure, with the guide rail C, ensures that one main test bench and multiple auxiliary test benches are on the same plane, meeting the vehicle frame layout requirements. The guide rail length is greater than the sum of the main and auxiliary test bench lengths, and can be even longer, to accommodate one main test bench and multiple auxiliary test benches, meeting the need for simultaneous testing of multiple reconfigurable vehicle frames E. The stop seat D is used to limit the sliding of the main test bench and prevent movement.

[0033] The electric actuator A4, displacement sensor A6, and torque sensor A5 are respectively connected to the control box and the host computer component A10. In this structure, the extension and retraction of the electric actuator A4 are controlled by the control box and the host computer component A10. The displacement sensor A6 and torque sensor A5 each measure and feed back data to the control box and the host computer component A10. The data is then stored and analyzed.

[0034] The reconfigurable vehicle frame E is configured to connect to the main frame A. When connected to the main frame A, the front of the reconfigurable vehicle frame E is secured to each side by a main frame locking stud A9, and the rear of the reconfigurable vehicle frame E is secured to each side by a main frame locking stud A9. The reconfigurable vehicle frame E is also configured to connect to the sub-frame B. When connected to the sub-frame B, the front of the reconfigurable vehicle frame E is supported by a threaded jack B5, and the rear of the reconfigurable vehicle frame E is secured to each side by a sub-frame locking stud B6. This structure ensures a reliable connection of the reconfigurable vehicle frame E to the sub-frame B, guaranteeing reliable support and limiting at the corresponding corner positions of the reconfigurable vehicle frame E on the sub-frame during connection.

[0035] After the reconfigurable vehicle frame E is connected to the main test bench A, the two main test bench locking studs A9 at the rear of the main test bench A are set to a loosened structure. After the reconfigurable vehicle frame E is connected to the auxiliary test bench B, the threaded jack B5 at the front of the auxiliary test bench B and the reconfigurable vehicle frame E are set to a suspended state. Before conducting the test, the constraints on the rear of the reconfigurable vehicle frame E on the main test bench A and the constraints on the front of the reconfigurable vehicle frame E on the auxiliary test bench B need to be released to ensure that the reconfigurable vehicle frame E on the main test bench A can reliably swing under the swing action of the balance bar, and that the reconfigurable vehicle frame E on the auxiliary test bench B can reliably move relative to the reconfigurable vehicle frame E on the main test bench A to complete the stiffness test.

[0036] The reconfigurable vehicle frame connection torsional stiffness test bench includes a main bench A and multiple auxiliary benches B. Multiple reconfigurable vehicle frames E are used for torsional stiffness testing, with one reconfigurable vehicle frame E arranged on each bench. Considering the versatility of various reconfigurable frame stiffness analyses, the bench adopts a modular design. The main bench carries multiple auxiliary benches, and it can be expanded to a combination of one main bench and multiple auxiliary benches to achieve connection stiffness tests on multiple reconfigurable vehicle frames E. Recognizing that more modular reconfigurations can lead to inconsistent overall accuracy and level, which would seriously affect the analysis accuracy and results, sliders and guide rails are specifically designed at the bottom of the main and auxiliary benches to effectively solve the problem of uneven horizontal surfaces.

[0037] In this invention, the test bench has a sliding handle B7 for pulling the sub-bench B along the guide rail C. The sub-bench base plate brake B9 locks the sub-bench B, ensuring reliable positioning between the sub-bench B and the guide rail C during testing, preventing slippage and ensuring reliable test completion. Before or after the test, when the sub-bench B needs to be moved, the sub-bench base plate brake B9 is in a released, unbraked state, ensuring the sub-bench B can be moved as needed. The sub-bench base plate brake B9 can be a T-shaped, rotating rod structure, screwed onto the sub-bench's screw holes. Rotation enables lifting and lowering, and after rotation, it reliably contacts the guide rail C, limiting the sub-bench B's position.

[0038] The test bench of this invention can be adapted to a single-axis reconfigurable vehicle frame as a single module; its modular structure supports expansion, adapting to the number of reconfigurable vehicle frames; the multi-modal combination results in high precision, with the levelness and flatness of the main and auxiliary benches achieving consistent positioning through cooperation with guide rails, allowing for flexible maneuverability; to better accommodate stiffness tests on multiple reconfigurable vehicle frames, the basic configuration includes two benches, a main bench and an auxiliary bench, each with a slider and guide rail at its bottom. It has an independent control box supporting remote control operation, ensuring a safe testing environment. An independent host computer provides data storage, analysis, and transmission functions.

[0039] The reconfigurable vehicle frame connection torsional stiffness test bench of this invention is structurally configured with a main bench A and a secondary bench B. The main bench A and secondary bench B have different structures; one main bench A is used, while multiple secondary benches B can be used. Before testing, a corresponding reconfigurable vehicle frame E is connected to both the main bench A and the secondary bench B. The main bench A and the secondary bench B closest to it need to be connected, and adjacent secondary benches B need to be connected as well. When the corresponding reconfigurable vehicle frame E is connected to the main bench A, each side of the front portion of the reconfigurable vehicle frame E is fixed by a main bench locking stud A9, and each side of the rear portion of the reconfigurable vehicle frame E is fixed by a main bench locking stud A9. When the corresponding reconfigurable vehicle frame E is connected to the secondary bench B, each side of the front portion of the reconfigurable vehicle frame E is supported by a threaded jack B5, and each side of the rear portion of the reconfigurable vehicle frame E is fixed by a secondary bench locking stud B6. Then, the two main frame locking studs A9 at the rear of the main frame A are set to a loosened structure; the two threaded jacks B5 and the reconfigurable vehicle frame E at the front of the auxiliary frame B are set to a suspended state. Thus, when the power to the control box and the host computer component A10 is turned on, the electric push cylinder A4 drives the balance bar A2 to swing. Because the front of the reconfigurable vehicle frame E is connected to the balance bar A2, and the rear of the reconfigurable vehicle frame E is unrestrained, and the front of the auxiliary frame B is unrestrained, the reconfigurable vehicle frames E on the main frame A and the auxiliary frame B can achieve swinging and torsional movements. The torque sensor A5 and displacement sensor A6 detect the corresponding data of the reconfigurable vehicle frame E on the main frame A, and the corresponding data is input to the control box and the host computer component. The conclusions are displayed on the host computer, and the data is saved. The host computer supports the storage, comparison, analysis, and output of multiple sets of data.

Claims

1. A test bench for the torsional stiffness of a reconfigurable vehicle frame connection, characterized in that: The main frame (A) and the auxiliary frame (B) are arranged on the guide rail (C). A balance bar mechanism (A14) is installed at the front of the main frame movable base (A1) of the main frame (A). A main frame fixed support (A3) is installed at the rear of the main frame movable base (A1). The balance bar mechanism (A14) is movably hinged to the front of the main frame movable base (A1) in the middle. The side of the balance bar mechanism (A14) is connected to the main frame movable base (A1) via an electric push cylinder (A4). A displacement sensor (A6) is installed on the electric push cylinder (A4). The upper part of the balance bar mechanism (A14) is connected to the main frame fisheye joint shaft (A8) via a main frame rotating seat (A7). A torque sensor (A5) is installed between A7 and the main frame fisheye joint shaft (A8). A main frame locking stud (A9) is installed on the main frame fisheye joint shaft (A8). The main frame fisheye joint shaft (A8) is installed on the main frame fixed support (A3). The main frame locking stud (A9) is installed on the main frame fisheye joint shaft (A8). A secondary frame fixed support (B2) is installed at the front and rear of the secondary frame (B). A secondary frame rotating seat (B3) or threaded jack (B5) is installed on the secondary frame fixed support (B2). A secondary frame locking stud (B6) is installed on the secondary frame fisheye joint shaft (B4) connected to the secondary frame rotating seat (B3).

2. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 1, characterized in that: The balance bar mechanism (A14) includes a mechanism connecting seat (A13) and a balance bar (A2). The side of the balance bar (A2) is connected to the main frame moving base (A1) via an electric push cylinder (A4). A displacement sensor (A6) is installed on the electric push cylinder (A4). The upper part of each side of the balance bar (A2) is connected to the main frame rotating seat (A7) via the main frame connecting seat (A15).

3. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 1 or 2, characterized in that: The sub-platform (B) is provided with a sub-platform fixed support seat (B2) on each side of the front part and a sub-platform fixed support seat (B2) on each side of the rear part. Threaded jacks (B5) are provided on the two sub-platform fixed support seats (B2) at the front part of the sub-platform (B). Sub-platform rotating seats (B3) are provided on the two sub-platform fixed support seats (B2) at the rear part of the sub-platform (B). Sub-platform locking studs (B6) are provided on the sub-platform fisheye joint shaft (B4) connected to each sub-platform rotating seat (B3).

4. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 2, characterized in that: The main frame (A) is provided with a main frame base pad (A11) on each side of its bottom. The main frame base pad (A11) on each side is connected to the main frame slider. The main frame slider is movably engaged on the guide rail (C). The guide rail (C) is provided with a stop seat (D).

5. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 3, characterized in that: The auxiliary platform (B) is provided with a base plate (B10) on each side of its bottom. The base plate (B10) on each side is connected to the auxiliary platform slider, and the auxiliary platform slider is movably engaged on the guide rail (C).

6. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 1 or 2, characterized in that: The electric push cylinder (A4), displacement sensor (A6), and torque sensor (A5) are respectively connected to the control box and the host computer assembly (A10).

7. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 1 or 2, characterized in that: The reconfigurable vehicle frame (E) is configured to be connected to the main frame (A). When the reconfigurable vehicle frame (E) is connected to the main frame (A), the front of the reconfigurable vehicle frame (E) is fixed by a main frame locking stud (A9) on each side, and the rear of the reconfigurable vehicle frame (E) is fixed by a main frame locking stud (A9) on each side.

8. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 7, characterized in that: The reconfigurable vehicle frame (E) is configured to be connected to the subframe (B). When the reconfigurable vehicle frame (E) is connected to the subframe (B), the front of the reconfigurable vehicle frame (E) is supported by threaded jacks (B5) on each side, and the rear of the reconfigurable vehicle frame (E) is fixed by subframe locking studs (B6) on each side.

9. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 8, characterized in that: After the reconfigurable vehicle frame (E) is connected to the main frame (A), the two main frame locking studs (A9) at the rear of the main frame (A) are set to a loose structure; after the reconfigurable vehicle frame (E) is connected to the auxiliary frame (B), the threaded jack (B5) at the front of the auxiliary frame (B) and the reconfigurable vehicle frame (E) are set to a suspended state.

10. The reconfigurable vehicle frame connection torsional stiffness test bench according to claim 1 or 2, characterized in that: The reconfigurable vehicle frame connection torsional stiffness test bench includes a main frame (A) and multiple auxiliary frames (B). Multiple reconfigurable vehicle frames (E) are used for torsional stiffness testing, with one reconfigurable vehicle frame (E) arranged on each frame.

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