High-power single-input coaxial double-side output gearbox test bench

Abstract

The utility model discloses a high-power single-input coaxial double-side output gear box test bench, relates to the technical field of gear box testing, and is used for testing a tested gear box, and the tested gear box is provided with a first tested piece and a second tested piece which are coaxial in a first direction and are symmetrically arranged; the test bench comprises two loading blocks which are symmetrical about a tested gear box and are coaxially arranged, each loading block comprises a loading shell and a loading inner ring which is coaxially and rotatably sleeved in the loading shell, the inner wall of each loading inner ring is fixedly connected with a loading output shaft, and the two loading output shafts are coaxially and fixedly connected with a first tested piece and a second tested piece respectively; the loading device comprises two groups of loading assemblies and is used for applying a load along a first direction to the loading block; the loading block reduces friction interference, the loading device can apply a controllable load in the axial direction, the loading block and the loading output shaft act on the first tested piece or the second tested piece, impact damage to the tested gear box caused by instant overload is avoided, and the loading device is suitable for load testing of the high-power gear box.

Description

Technical Field

[0001] This application relates to the technical field of gearbox testing, and specifically relates to a test bench for a high-power single-input coaxial double-sided output gearbox. Background Art

[0002] As a key component in various mechanical equipment, the performance of the gearbox directly affects the quality and operating stability of the entire system. To ensure the reliability and durability of the gearbox, a load running-in test is usually required after assembly to verify whether its temperature, vibration, meshing, sealing, etc. meet the standards. This kind of test is of great significance for improving product quality and lifespan and has wide application value in the field of industrial mechanical equipment.

[0003] The single-input coaxial opposite-side output gearbox is a specially designed transmission device. Its core feature is that it is driven by a single input shaft, and the output shafts are coaxially arranged but on the opposite side (symmetrically output on both sides). It is commonly used in scenarios that require bilateral synchronous transmission or a spatially symmetric layout. Currently, the test benches for single-input coaxial opposite-side output gearboxes on the market have a relatively low test power and cannot meet the high-power test requirements. For gearboxes that meet high-power tests, due to characteristics such as high speed and large torque, it is difficult to directly apply a simulated load to them, which is likely to cause damage to the gearbox. Therefore, we propose a test bench for a high-power single-input coaxial double-sided output gearbox. Summary of the Utility Model

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a test bench for a high-power single-input coaxial double-sided output gearbox.

[0005] In a first aspect, this application provides a test bench for a high-power single-input coaxial double-sided output gearbox, which is used to test the gearbox under test. The gearbox under test has a first test piece and a second test piece, and the first test piece and the second test piece are coaxially and symmetrically arranged in a first direction. The test bench includes:

[0006] Two loading blocks, the two loading blocks are symmetric and coaxially arranged with respect to the gearbox under test. The loading block includes a loading outer shell and a loading inner ring rotatably sleeved coaxially inside the loading outer shell. A loading output shaft is fixedly connected to the inner wall of the loading inner ring, and the two loading output shafts are respectively coaxially and fixedly connected to the first test piece and the second test piece;

[0007] A loading device, the loading device includes two groups of symmetrically arranged loading components. The loading components are arranged on the side wall of the loading outer shell away from the gearbox under test and are used to apply a load along the axial direction of the loading output shaft to the loading block.

[0008] According to the technical solution provided by the embodiment of the present application, it includes a frame. A first installation space is arranged inside the frame. The gearbox under test is arranged in the first installation space. A top plate and a bottom plate are respectively arranged at the top and bottom of the frame. The two loading output shafts respectively pass through the top plate and the bottom plate movably.

[0009] According to the technical solution provided by the embodiment of the present application, the loading assembly includes at least three loading members arranged circumferentially and evenly. Each loading member has a fixed end and a telescopic end. The telescopic end is fixedly connected to the loading housing. The fixed end of the loading member close to the first measured member is fixedly connected to the top plate, and the fixed end of the loading member close to the second measured member is fixedly connected to the bottom plate.

[0010] According to the technical solution provided by the embodiment of the present application, at least two linear sliding bearings are evenly arranged on the circumferential side wall of the loading housing. A stabilizing rod is slidably arranged in the linear sliding bearing. The end of the stabilizing rod far from the gearbox under test and close to the first measured member is fixedly connected to the top plate, and the end of the stabilizing rod far from the gearbox under test and close to the second measured member is fixedly connected to the bottom plate.

[0011] According to the technical solution provided by the embodiment of the present application, it further includes:

[0012] A first loading structure, which includes a first loading gearbox and a first driving member. The first loading gearbox has a first input shaft and a first output shaft. The first driving member has a first driving shaft;

[0013] The loading output shaft connected to the first measured member is connected to the first input shaft through a first coupling, and the first output shaft is connected to the first driving shaft through a second coupling;

[0014] A torque sensor is arranged between the first coupling and the first input shaft.

[0015] According to the technical solution provided by the embodiment of the present application, it further includes:

[0016] A second loading structure, which includes a second loading gearbox and a second driving member. The second loading gearbox has a second input shaft and a second output shaft. The second driving member has a second driving shaft;

[0017] The loading output shaft connected to the second measured member is connected to the second input shaft through a third coupling, and the second output shaft is connected to the second driving shaft through a fourth coupling;

[0018] A torque sensor is arranged between the third coupling and the second input shaft.

[0019] According to the technical solution provided by the embodiment of the present application, it further includes:

[0020] An input structure, the input structure includes a third driving member and an input gearbox, the third driving member has a third driving shaft, the input gearbox has a third input shaft and a third output shaft, and the gearbox under test further has an input member;

[0021] The third driving shaft and the third input shaft are connected by a fifth coupling and a sixth coupling, and a torque sensor is arranged between the fifth coupling and the sixth coupling;

[0022] The third output shaft is connected with a connecting shaft through a seventh coupling, one end of the connecting shaft away from the seventh coupling is connected with a fourth input shaft through an eighth coupling, and the fourth input shaft and the input member are coaxially and fixedly connected.

[0023] According to the technical solution provided by the embodiment of the present application, it further includes:

[0024] A bearing structure, the bearing structure includes a base, and the base is provided with a first bearing part, a second bearing part and a third bearing part which are arranged in a staggered manner. The first bearing part is used to bear the first loading structure, the second bearing part is used to bear the second loading structure, and the third bearing part is used to bear the input structure;

[0025] Load-bearing platforms are arranged on the tops of the first bearing part, the second bearing part and the third bearing part, respectively, for ensuring the stability of the input structure, the first loading structure and the second loading structure.

[0026] According to the technical solution provided by the embodiment of the present application, the bearing structure further includes a bearing frame, the bearing frame is arranged on the second bearing part, and a second installation space is arranged inside the bearing frame for installing the frame, and the frame and the bearing frame are connected by a connecting rod;

[0027] An opening is formed at the top of the bearing frame for the frame to pass through;

[0028] A load-bearing platform is arranged at the top of the bearing frame for bearing the first loading gearbox.

[0029] According to the technical solution provided by the embodiment of the present application, rotating members are arranged on both the top plate and the bottom plate for ensuring the rotational stability of the loading output shaft.

[0030] In summary, the present application specifically discloses a high-power single-input coaxial double-sided output gearbox test bench for testing a gearbox under test. The gearbox under test has a first tested part and a second tested part, and the first tested part and the second tested part are coaxially and symmetrically arranged in a first direction;

[0031] The test bench includes two loading blocks, which are symmetrically and coaxially arranged with respect to the gearbox under test. Each loading block includes a loading housing and a loading inner ring that rotates coaxially inside the loading housing. A loading output shaft is fixedly connected to the inner wall of the loading inner ring, and the two loading output shafts are respectively coaxially and fixedly connected to the first test piece and the second test piece;

[0032] The test bench also includes a loading device, which includes two groups of symmetrically arranged loading components for applying a load in the first direction to the loading blocks;

[0033] Through the symmetrically arranged loading blocks and loading components, high axial loads can be applied to both sides of the gearbox under test simultaneously, simulating the high-power transmission conditions under actual working conditions. The coaxial symmetric loading form is adopted to ensure the balanced distribution of the load and avoid damage to the gearbox caused by unilateral overload. It is especially suitable for the reliability verification of large-torque and high-speed gearboxes; the loading device can apply a controllable load axially, more realistically simulating the stress state of the gearbox in actual applications;

[0034] The coaxial symmetric design ensures that the loading force is strictly aligned with the output shaft of the gearbox, avoiding additional bending moments or vibrations caused by eccentric loading and improving the reliability of the test data.

[0035] The rotating socket structure between the loading inner ring and the loading housing reduces frictional interference, making the load application more accurate and reducing the influence of mechanical losses on the test results at the same time;

[0036] Through the independent adjustment of the double loading components, the performance of the gearbox under test under symmetric and asymmetric loads can be tested, verifying its torque distribution balance, transmission stability and anti-offset load capacity. Through the controllable loading form, the impact damage to the gearbox under test caused by instantaneous overload can be avoided, especially suitable for the progressive load test of high-power gearboxes. Description of the Drawings

[0037] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0038] Figure 1 It is a schematic diagram of a test bench for a high-power single-input coaxial double-output gearbox.

[0039] Figure 2 It is the front view of the input structure, the first loading structure and the second loading structure.

[0040] Figure 3 It is a schematic diagram of the first loading structure.

[0041] Figure 4 It is a schematic diagram of the loading device.

[0042] Figure 5 It is a cross-sectional view of the loading device.

[0043] Reference numerals in the figure: 1. Test gearbox; 2. Loading block; 3. Frame; 4. Loading member; 5. First loading gearbox; 6. First driving member; 7. First coupling; 8. Second coupling; 9. Torque sensor; 10. Second loading gearbox; 11. Second driving member; 12. Third coupling; 13. Fourth coupling; 14. Third driving member; 15. Input gearbox; 16. Fifth coupling; 17. Sixth coupling; 18. Connecting shaft; 19. Seventh coupling; 20. Base; 21. First bearing portion; 22. Second bearing portion; 23. Third bearing portion; 24. Loading platform; 25. Loading rack; 26. Rotating member; 27. Linear sliding bearing; 28. Connecting rod; 29. Eighth coupling; 30. Loading output shaft. Specific embodiments

[0044] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model and do not limit the utility model. Additionally, it should be noted that for the sake of description, only the parts related to the utility model are shown in the drawings.

[0045] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0046] The present application provides a high-power single-input coaxial double-sided output gearbox test bench for performing a simulated load application test on the test gearbox 1. The test gearbox 1 has a T-shaped structure, which has an input member, a first measured member, and a second measured member, and both the first measured member and the second measured member are meshed and connected to the input member. The first measured member and the second measured member are coaxially and symmetrically arranged in the first direction;

[0047] Optionally, the input member, the first measured member, and the second measured member are all bevel gears; the first direction is Figure 2 the vertical direction.

[0048] As Figure 4 and Figure 5 shown, the test bench includes:

[0049] Two loading blocks 2, and the two loading blocks 2 are symmetric and coaxially arranged with respect to the test gearbox 1;

[0050] The loading block 2 includes a loading outer shell and a loading inner ring coaxially and rotatably connected inside the loading outer shell;

[0051] Specifically, the two loading blocks 2 are vertically distributed in the first direction. The loading outer shell and the loading inner ring are in a coaxial rotating connection form. A chute can be provided on the inner wall of the loading outer shell, and a slider can be provided on the outer wall of the loading inner ring. Through the sliding connection between the slider and the chute, the coaxial rotating connection form between the loading outer shell and the loading inner ring is realized. Further, lubricating oil is filled between the loading outer shell and the loading inner ring and sealed;

[0052] The coaxial rotating connection structure between the loading inner ring and the loading outer shell and the form of filling lubricating oil reduce the frictional interference, making the load application more accurate and reducing the influence of mechanical loss on the test results at the same time;

[0053] A loading output shaft 30 is fixedly connected to the inner wall of the loading inner ring. The two loading output shafts 30 are respectively coaxially and fixedly connected to the first tested part and the second tested part;

[0054] Thus, it is realized that the rotation of the first tested part and the second tested part respectively drives the two loading output shafts 30 to rotate, thereby causing the loading inner ring to rotate, while the loading outer ring does not rotate. The loading block 2 can ensure the rotational stability of the loading output shaft 30 and does not affect the torque transmission;

[0055] It should be noted that, as Figure 5 shown, an installation position is provided on the circumferential side wall of the loading output shaft 30 for fixedly connecting with the loading inner ring, whereby the loading block 2 can be limited to prevent the loading block 2 from detaching;

[0056] It should be noted that, as Figure 5 shown, the loading output shaft 30 is a hollow shaft, which can reduce the weight.

[0057] As Figure 4 shown, the test bench further includes:

[0058] A loading device, which includes two groups of symmetrically arranged loading components. The loading components are arranged on the side wall of the loading outer shell away from the tested gearbox 1 and are used to apply a load along the axial direction of the loading output shaft 30; the axial direction of the loading output shaft 30 is parallel to the first direction;

[0059] Further, the loading component includes at least three loading members 4. The at least three loading members 4 are evenly distributed circumferentially and are located on the side wall of the loading outer shell away from the tested gearbox 1. The loading member 4 can be selected as a hydraulic rod, which can apply pressure or tension to the loading block 2 along the first direction, thereby applying a load along its axial direction to the loading output shaft 30. Further, the load can be applied to the first tested part or the second tested part to apply a load to the tested gearbox 1;

[0060] At least three loading members 4 evenly distributed circumferentially can ensure that the applied load is strictly centered with the loading output shaft 30, avoiding additional bending moments or vibrations caused by eccentric loading and improving the reliability of test data.

[0061] As Figure 2 and Figure 3 shown, the test bench further includes:

[0062] A frame 3, with a first installation space arranged inside the frame 3 for accommodating the gearbox under test 1. A top plate and a bottom plate are respectively arranged at the top and bottom of the frame 3, and two loading output shafts 30 respectively pass through the top plate and the bottom plate movably;

[0063] Furthermore, rotating members 26 are arranged on both the top plate and the bottom plate to ensure the rotational stability of the loading output shaft 30; optionally, the type of the rotating member 26 is: oil seal bearing or sliding bearing.

[0064] The loading member 4 has a fixed end and a telescopic end. The telescopic end is fixedly connected to the loading housing. The fixed end of the loading member 4 close to the first test piece is fixedly connected to the top plate, and the fixed end of the loading member 4 close to the second test piece is fixedly connected to the bottom plate;

[0065] Thus, through the telescoping of the telescopic end, the loading housing is driven to move in the first direction. Through the cooperation of the slider and the chute, the loading inner ring and the loading output shaft 30 are driven to move in the first direction, so that the first test piece or the second test piece can move in the first direction, and further, a tensile force or a pressure can be applied to the gearbox under test 1;

[0066] Furthermore, at least two linear sliding bearings 27 are evenly arranged on the circumferential side wall of the loading housing. A stabilizing rod is slidably arranged in the linear sliding bearing 27. One end of the stabilizing rod far from the gearbox under test 1 close to the first test piece is fixedly connected to the top plate, and one end of the stabilizing rod far from the gearbox under test 1 close to the second test piece is fixedly connected to the bottom plate;

[0067] When the loading member 4 applies a load to the gearbox under test 1, the loading block 2 can move. Through the sliding connection between the linear sliding bearing 27 and the stabilizing rod, the movement of the loading block 2 can be stably guided. By arranging at least two linear sliding bearings 27, the movement stability of the loading block 2 can be effectively ensured, and the test result of the gearbox under test 1 caused by the shaking of the loading block 2 and the loading output shaft 30 can be avoided from being inaccurate.

[0068] As Figures 1 to 3 shown, the test bench further includes:

[0069] A first loading structure, which includes a first loading gearbox 5 and a first driving member 6. The first loading gearbox 5 has a first input shaft and a first output shaft, and the first driving member 6 has a first driving shaft;

[0070] The loading output shaft 30 connected to the first DUT is connected to the first input shaft through the first coupling 7, and the first output shaft is connected to the first driving shaft through the second coupling 8;

[0071] A torque sensor 9 is provided between the first coupling 7 and the first input shaft for detecting the torque between the loading output shaft 30 connected to the first DUT and the first input shaft.

[0072] The test bench further includes:

[0073] A second loading structure, which includes a second loading gearbox 10 and a second driving member 11. The second loading gearbox 10 has a second input shaft and a second output shaft, and the second driving member 11 has a second driving shaft;

[0074] The loading output shaft 30 connected to the second DUT is connected to the second input shaft through the third coupling 12, and the second output shaft is connected to the second driving shaft through the fourth coupling 13;

[0075] A torque sensor 9 is provided between the third coupling 12 and the second input shaft for detecting the torque between the loading output shaft 30 connected to the second DUT and the second input shaft.

[0076] The test bench further includes:

[0077] An input structure, which includes a third driving member 14 and an input gearbox 15. The third driving member 14 has a third driving shaft, and the input gearbox 15 has a third input shaft and a third output shaft;

[0078] The third driving shaft and the third input shaft are connected through the fifth coupling 16 and the sixth coupling 17. A torque sensor 9 is provided between the fifth coupling 16 and the sixth coupling 17 for detecting the torque between the third driving shaft and the third input shaft;

[0079] The third output shaft is connected to a connecting shaft 18 through a seventh coupling 19. One end of the connecting shaft 18 away from the seventh coupling 19 is connected to a fourth input shaft through an eighth coupling 29, and the fourth input shaft is coaxially and fixedly connected to the input member;

[0080] A torque sensor 9 is provided between the third output shaft and the seventh coupling 19 for detecting the torque between the third output shaft and the connecting shaft 18; a torque sensor 9 is provided between the eighth coupling 29 and the fourth input shaft for detecting the torque between the connecting shaft 18 and the fourth input shaft.

[0081] It should be noted that the input gearbox 15 is a speed increasing device, and the first loading gearbox 5 and the second loading gearbox 10 are speed reducing devices;

[0082] Thus, by starting the third driving member 14, the third driving shaft rotates, drives the input member to rotate through the input gearbox 15, so that the first and second measured members rotate, and transmits the torque to the first loading gearbox 5 and the second loading gearbox 10 through the two loading output shafts 30 respectively, and then transmits the torque to the first driving member 6 and the second driving member 11 respectively;

[0083] Furthermore, considering reducing the diameter of the third driving shaft, the third driving member 14 is selected with a rated speed of 3000 RPM to reduce the torque. The third driving member 14 drives the third driving shaft to rotate, and then speeds up through the input gearbox 15, enabling the speed of the input member to reach 8000 rpm. Then the first and second measured members rotate, and after decelerating through the first loading gearbox 5 and the second loading gearbox 10, the speeds of the first driving shaft and the second driving shaft are 3000 rpm;

[0084] By setting the power of the third driving member 14 and replacing the connecting shaft 18 with different specifications, the performance of the connecting shaft 18 can be verified;

[0085] The power of the third driving member 14 is not less than 42 MW, and the powers of the first driving member 6 and the second driving member 11 are not less than 20 MW, meeting the requirements of high-power load testing;

[0086] Optionally, the first driving member 6, the second driving member 11, and the third driving member 14 are all motors.

[0087] As Figure 1 shown, the test bench further includes:

[0088] A bearing structure, which includes a base 20. On the base 20, there are a first bearing part 21, a second bearing part 22, and a third bearing part 23 distributed in a stepped manner. The first bearing part 21 is used to bear the first loading structure, the second bearing part 22 is used to bear the second loading structure, and the third bearing part 23 is used to bear the input structure;

[0089] Furthermore, the top planes of the first bearing part 21, the second bearing part 22, and the third bearing part 23 are all perpendicular to the first direction, and the top plane of the third bearing part 23 is located between the top planes of the first bearing part 21 and the second bearing part 22;

[0090] Optionally, the base 20 is cast with reinforced concrete. Since the input structure, the first loading structure, and the second loading structure are large in volume and heavy in weight due to their high-power characteristics, the base 20 can well bear the input structure, the first loading structure, and the second loading structure, ensuring the stability of the test bench;

[0091] A load-bearing platform 24 is provided at the top of each of the first load-bearing part 21, the second load-bearing part 22, and the third load-bearing part 23 to ensure the stability of the input structure, the first loading structure, and the second loading structure;

[0092] The load-bearing platform 24 can be selected as a cast iron platform to further ensure the stability of the test bench.

[0093] The load-bearing structure further includes a load-bearing frame 25, and the load-bearing frame 25 is provided on the second load-bearing part 22. Optionally, the load-bearing frame 25 is a steel frame;

[0094] Furthermore, a second installation space is provided inside the load-bearing frame 25 for installing the frame 3;

[0095] Furthermore, the frame 3 and the load-bearing frame 25 are connected by a connecting rod 28 to ensure the stability of the frame 3;

[0096] Furthermore, an opening communicating with the second installation space is provided at the top of the load-bearing frame 25 for hoisting the frame 3 from the opening into the second installation space when installing the frame 3;

[0097] It should be noted that since the test gearbox 1, the loading device, the loading block 2, and the loading output shaft 30 are all provided in the frame 3, and the first test piece and the second test piece are symmetrically arranged, and the loading components, the loading block 2, and the loading output shaft 30 corresponding to the first test piece and the second test piece are all symmetrically arranged. Therefore, before hoisting the frame 3, it is necessary to perform a dynamic balance test on the test gearbox 1, the loading device, the loading block 2, and the loading output shaft 30, and then hoist the frame 3 and put it into the second installation space through the opening, so as to ensure the accuracy of the test results of the test gearbox 1;

[0098] Furthermore, a through port communicating with the second installation space is provided on the load-bearing frame 25. After the simulated load test of the test gearbox 1 is completed, the connection between the test gearbox 1 and the input structure, the first loading structure, and the second loading structure can be disassembled, and the frame 3 can be removed from the second installation space through the through port for easy disassembly.

[0099] The top plane of the load-bearing frame 25 and the top plane of the first load-bearing part 21 are coplanar, and a load-bearing platform 24 is provided at the top of the load-bearing frame 25 for bearing the first loading gearbox 5.

[0100] Working principle: The test gearbox 1, the loading device, the loading block 2, and the loading output shaft 30 are all provided in the frame 3. After the overall dynamic balance test of the frame 3 is completed, the frame 3 is hoisted and placed into the second installation space through the opening and fixed, and then the connection between the test gearbox 1 and the input structure, the first loading structure, and the second loading structure is completed;

[0101] The starting input structure drives the input part to rotate, thereby causing the first and second measured parts to rotate, and then driving the first and second loading structures to work;

[0102] The telescopic movement of the loading part 4 drives the loading block 2 to move, thereby driving the loading output shaft 30 to move in the first direction, and further causing the first or second measured part to move. Thus, the telescopic movement of the loading part 4 can apply a tensile or compressive load to the first or second measured part, realizing the load test of the tested gearbox 1 with high rotational speed and large torque;

[0103] When a load is applied to the first or second measured part, the external detection device can detect indicators such as the load condition, torque transmission efficiency, and power loss condition.

[0104] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the utility model. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A high-power single-input coaxial double-sided output gearbox test bench for testing a gearbox under test (1), wherein the gearbox under test (1) has a first test piece and a second test piece, and the first test piece and the second test piece are coaxially and symmetrically arranged in a first direction, characterized in that, The test bench includes: Two loading blocks (2), the two loading blocks (2) are symmetrically and coaxially arranged with respect to the gearbox under test (1). The loading block (2) includes a loading housing and a loading inner ring rotatably sleeved coaxially inside the loading housing. A loading output shaft (30) is fixedly connected to the inner wall of the loading inner ring. The two loading output shafts (30) are respectively fixedly connected coaxially to the first test piece and the second test piece. A loading device, the loading device includes two groups of loading components arranged symmetrically. The loading components are arranged on the side wall of the loading housing away from the gearbox under test (1) for applying a load along the axial direction of the loading output shaft (30) to the loading block (2).

2. The high-power single-input coaxial double-sided output gearbox test bench according to claim 1, wherein, It further includes a frame (3). A first installation space is arranged inside the frame (3). The gearbox under test (1) is arranged in the first installation space. A top plate and a bottom plate are respectively arranged at the top and bottom of the frame (3). The two loading output shafts (30) respectively pass through the top plate and the bottom plate movably.

3. A high-power single-input coaxial double-sided output gearbox test bench according to claim 2, characterized in that, The loading component includes at least three loading members (4) arranged circumferentially and evenly. The loading member (4) has a fixed end and a telescopic end. The telescopic end is fixedly connected to the loading housing. The fixed end of the loading member (4) close to the first test piece is fixedly connected to the top plate, and the fixed end of the loading member (4) close to the second test piece is fixedly connected to the bottom plate.

4. A high-power single-input coaxial double-sided output gearbox test bench according to claim 3, characterized in that, At least two linear sliding bearings (27) are evenly arranged on the circumferential side wall of the loading housing. A stabilizing rod is slidably arranged inside the linear sliding bearing (27). One end of the stabilizing rod away from the gearbox under test (1) close to the first test piece is fixedly connected to the top plate, and one end of the stabilizing rod away from the gearbox under test (1) close to the second test piece is fixedly connected to the bottom plate.

5. A high-power single-input coaxial double-sided output gearbox test bench according to claim 3, characterized in that, It further includes: A first loading structure, the first loading structure includes a first loading gearbox (5) and a first driving member (6). The first loading gearbox (5) has a first input shaft and a first output shaft. The first driving member (6) has a first driving shaft. The loading output shaft (30) connected to the first test piece is connected to the first input shaft through a first coupling (7), and the first output shaft is connected to the first driving shaft through a second coupling (8). A torque sensor (9) is arranged between the first coupling (7) and the first input shaft.

6. The high-power single-input coaxial double-sided output gearbox test bench according to claim 5, wherein It further includes: A second loading structure, the second loading structure includes a second loading gearbox (10) and a second driving member (11). The second loading gearbox (10) has a second input shaft and a second output shaft. The second driving member (11) has a second driving shaft. The loading output shaft (30) connected to the second test piece is connected to the second input shaft through a third coupling (12), and the second output shaft is connected to the second driving shaft through a fourth coupling (13). A torque sensor (9) is arranged between the third coupling (12) and the second input shaft.

7. A high-power single-input coaxial double-sided output gearbox test bench according to claim 6, characterized in that, It further includes: Input structure, the input structure includes a third driving member (14) and an input gearbox (15), the third driving member (14) has a third driving shaft, the input gearbox (15) has a third input shaft and a third output shaft, and the gearbox under test (1) also has an input member; The third driving shaft and the third input shaft are connected by a fifth coupling (16) and a sixth coupling (17), and a torque sensor (9) is arranged between the fifth coupling (16) and the sixth coupling (17); The third output shaft is connected with a connecting shaft (18) through a seventh coupling (19), one end of the connecting shaft (18) far away from the seventh coupling (19) is connected with a fourth input shaft through an eighth coupling (29), and the fourth input shaft is coaxially and fixedly connected with the input member.

8. A high-power single-input coaxial double-sided output gearbox test bench according to claim 7, characterized in that, It also includes: A bearing structure, the bearing structure includes a base (20), a first bearing portion (21), a second bearing portion (22) and a third bearing portion (23) with staggered distribution are arranged on the base (20), the first bearing portion (21) is used for bearing the first loading structure, the second bearing portion (22) is used for bearing the second loading structure, and the third bearing portion (23) is used for bearing the input structure; Loading platforms (24) are arranged on the tops of the first bearing portion (21), the second bearing portion (22) and the third bearing portion (23) to ensure the stability of the input structure, the first loading structure and the second loading structure.

9. The high-power single-input coaxial double-sided output gearbox test bench according to claim 8, characterized in that, The bearing structure also includes a bearing frame (25), the bearing frame (25) is arranged on the second bearing portion (22), a second installation space is arranged inside the bearing frame (25) for installing the frame (3), and the frame (3) and the bearing frame (25) are connected through a connecting rod (28); An opening is formed at the top of the bearing frame (25) for the frame (3) to pass through; A loading platform (24) is arranged at the top of the bearing frame (25) for bearing the first loading gearbox (5).

10. A high-power single-input coaxial double-sided output gearbox test bench according to claim 9, characterized in that, Rotating members (26) are arranged on both the top plate and the bottom plate to ensure the rotational stability of the loading output shaft (30).

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