Mine car power assembly test bed

Abstract

The utility model relates to the technical field of vehicle transmission system test devices, in particular to a tramcar power assembly test bed. The first fixing mechanism is arranged on the first guide groove and is used for mounting an engine; the second fixing mechanism is arranged on the second guide groove and is used for mounting a gearbox; the supporting mechanism is arranged on the bottom plate and used for adjusting the angle of the output end of the engine. Through the first guide groove, the first fixing mechanism can be matched and installed with any engine of the existing model and size; through the second guide groove, the second fixing mechanism can be matched and installed with any gearbox of the existing model and size, and the actual installation working condition angle of the whole vehicle can be reproduced; the height angle of the output end of the engine can be finely adjusted through the supporting mechanism. The mine car power assembly test bed is high in universality and can be repeatedly used, secondary design is not needed after a test sample piece is changed, and cost and time are saved.

Description

Technical Field

[0001] This application relates to the technical field of vehicle transmission system testing equipment, and in particular to a test bench for a mining truck powertrain. Background Art

[0002] The mine car powertrain test bench is an important tool for completing the design verification of the mine car powertrain. The mine car powertrain includes the engine and the transmission. Different engines and transmissions have different mounting point positions and structural dimensions. In addition, the installation of the powertrain on the vehicle often has a certain angle along the crankshaft axis of the engine. This requires the test bench to have greater versatility and be applicable to the testing of powertrains of different types and structural dimensions.

[0003] However, the existing mine truck powertrain test benches have poor versatility. In order to conduct a new powertrain test, it is often necessary to redesign and manufacture a new test bench, which increases the test cost and extends the test cycle. Utility Model Content

[0004] This application aims to at least address one of the technical problems in existing or related technologies: the poor versatility of existing mine truck powertrain test benches, which often requires the redesign and manufacture of a new test bench to conduct a new powertrain test, increasing testing costs and extending the testing cycle.

[0005] To address this, this application provides a mine car powertrain test bench. A first guide groove allows adjustment of the distance between the first fixing mechanisms, enabling the first fixing mechanisms to accommodate engines of any existing model and size. A second guide groove allows adjustment of the distance between the second fixing mechanism and the first fixing mechanism, enabling the second fixing mechanism to accommodate gearboxes of any existing model and size, and replicating the actual installation angles of the entire vehicle. A support mechanism allows for fine-tuning of the engine output angle during gearbox docking, enabling faster bolt docking of the engine output flywheel with the gearbox input. This mine car powertrain test bench is highly versatile, reusable, and requires no redesign after modifying the test sample, saving costs and time.

[0006] A mine car powertrain test bench according to an embodiment of this application includes: a base plate with a first guide groove and a second guide groove; a first fixing mechanism disposed on the first guide groove and used for mounting an engine; a second fixing mechanism disposed on the second guide groove and used for mounting a gearbox; and a support mechanism disposed on the base plate and used for adjusting the angle of the engine output end.

[0007] Optionally, the first fixing mechanism includes: a first base mounted on a first guide groove; a first support column disposed on the first base; and a first suspension mounting component disposed on the first support column, wherein the first suspension mounting component is provided with a plurality of mounting surfaces at different angles for mounting the engine.

[0008] Optionally, the mounting surface includes: a first mounting surface, a second mounting surface, and a third mounting surface, wherein the first mounting surface is positioned above the second mounting surface, and the second mounting surface is positioned above the third mounting surface; the third mounting surface is vertically positioned, and the first mounting surface has a first included angle with the vertical direction, and the second mounting surface has a second included angle with the vertical direction, wherein the first included angle is greater than the second included angle.

[0009] Optionally, the second fixing mechanism includes: a second base mounted on the second guide groove; a second support column disposed on the second base; and a second suspension mount disposed on the second support column, the second suspension mount being used to mount the gearbox.

[0010] Optionally, the second support column is provided with a number of equally spaced mounting holes for installing the second suspension mount.

[0011] Optionally, the second suspension mount is equipped with a rubber pad.

[0012] Optionally, the support mechanism includes: a housing mounted on a base plate; a lead screw with its bottom end inside the housing and its top end positioned above the housing; an arc-shaped plate positioned at the top of the lead screw, used to support the engine output end; and a height adjustment disc used to control the lead screw to raise or lower the arc-shaped plate.

[0013] Optionally, the base plate is provided with a first tool insertion hole and a second tool insertion hole.

[0014] Optionally, the base plate is provided with a first limiting block and a second limiting block.

[0015] Optionally, lifting rings are provided on the base plate.

[0016] One of the above technical solutions has at least the following advantages or beneficial effects:

[0017] The mine car powertrain test bench provided in this application includes: a base plate with a first guide groove and a second guide groove; a first fixing mechanism disposed on the first guide groove for mounting an engine; a second fixing mechanism disposed on the second guide groove for mounting a gearbox; and a support mechanism disposed on the base plate for adjusting the angle of the engine output end. The distance between the first fixing mechanisms can be adjusted via the first guide groove, allowing the first fixing mechanism to accommodate engines of any existing model and size. The distance between the second fixing mechanism and the first fixing mechanism can be adjusted via the second guide groove, allowing the second fixing mechanism to accommodate gearboxes of any existing model and size, and replicating the actual installation angle of the entire vehicle. The support mechanism allows for fine-tuning of the engine output end's height angle when docking the gearbox, enabling faster bolt docking between the engine output flywheel and the gearbox input end. This mine car powertrain test bench is highly versatile, reusable, and requires no redesign after modifying the test sample, saving costs and time. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This paper shows a schematic diagram of the structure of a mine car powertrain test bench provided in an embodiment of this application;

[0020] Figure 2 A schematic diagram of the structure of the base plate provided in an embodiment of this application is shown;

[0021] Figure 3 A schematic diagram of the structure of the first fixing mechanism provided in an embodiment of this application is shown;

[0022] Figure 4 A schematic diagram of the structure of the first suspension mounting component provided in an embodiment of this application is shown;

[0023] Figure 5 A schematic diagram of the structure of the second fixing mechanism provided in an embodiment of this application is shown;

[0024] Figure 6 A schematic diagram of the structure of the second suspension mounting component provided in an embodiment of this application is shown;

[0025] Figure 7 A schematic diagram of the support mechanism provided in an embodiment of this application is shown.

[0026] [Explanation of Labels in the Attached Image]

[0027] 1. Base plate; 11. First guide groove; 12. Second guide groove; 13. First limiting block; 14. Second limiting block; 15. First tool insertion hole; 16. Second tool insertion hole; 17. Frame fixing groove; 18. Lifting ring; 19. Raising strip.

[0028] 2. First fixing mechanism; 21. First base; 22. First support column; 23. First suspension mounting component; 231. First mounting surface; 232. Second mounting surface; 233. Third mounting surface; 234. Arc-shaped reinforcing rib; 24. Transverse reinforcing rib; 25. Triangular reinforcing rib.

[0029] 3. Second fixing mechanism; 31. Second base; 32. Second support column; 321. Mounting hole; 33. Second suspension mounting component; 331. Rubber pad.

[0030] 4. Support mechanism; 41. Arc plate; 42. Lead screw; 43. Height adjustment panel; 44. Box body. DETAILED DESCRIPTION

[0031] To better explain and facilitate understanding of this application, a detailed description of the application is provided below with reference to the accompanying drawings and specific embodiments. The directional terms such as "upper," "lower," "inner," and "outer" mentioned herein are used in conjunction with... Figure 1 The orientation is used as a reference. The position of the first suspension mounting member 23 relative to the first support column 22 is defined as "upper"; the position of the support mechanism 4 relative to the edge of the base plate 1 is defined as "inner".

[0032] As mentioned above, mining trucks, also known as mining dump trucks, are used in large open-pit mines, water conservancy projects, and other field sites to transport materials such as coal and sand. The powertrain of a mining truck consists of components such as an engine, transmission, drive shaft, differential, and transfer case. With the development of electrification, mining truck powertrains have expanded to include new power structures such as hybrid power systems. Mining truck manufacturers often conduct bench tests on hybrid powertrains, including vibration and noise tests, reliability tests, three-electric system tests, and transmission failure reproduction tests. These tests require the construction of engine and transmission test benches as the foundation of the powertrain. All other components, such as the cooling system, exhaust system, and fuel supply system, are built upon these test benches.

[0033] For passenger car test benches, the engine and transmission components of mining truck powertrains exhibit significant vibration, complex structures, and long dimensions, making their secure fixation crucial during testing. However, existing mining truck powertrain test benches lack versatility. To conduct a new powertrain test, a completely new test bench often needs to be designed and manufactured, increasing testing costs and extending the testing cycle.

[0034] To address at least one of the technical problems existing in the prior art or related technologies, this application provides a mine car powertrain test bench, comprising: a base plate with a first guide groove and a second guide groove; a first fixing mechanism disposed on the first guide groove for mounting an engine; a second fixing mechanism disposed on the second guide groove for mounting a gearbox; and a support mechanism disposed on the base plate for adjusting the angle of the engine output end. The first guide groove allows adjustment of the distance between the first fixing mechanisms, enabling them to accommodate engines of any existing model and size. The second guide groove allows adjustment of the distance between the second fixing mechanism and the first fixing mechanism, enabling them to accommodate gearboxes of any existing model and size, and replicating the actual installation angle of the entire vehicle. The support mechanism allows for fine-tuning of the engine output end's height angle during gearbox docking, enabling faster bolt docking between the engine output flywheel and the gearbox input end. This mine car powertrain test bench is highly versatile, reusable, and requires no redesign after modifying the test sample, saving costs and time.

[0035] The following description, with reference to the accompanying drawings, describes a mine car powertrain test bench according to some embodiments provided in this application.

[0036] See Figures 1 to 7 This application provides a mine car powertrain test bench, comprising: a base plate 1, on which a first guide groove 11 and a second guide groove 12 are provided; a first fixing mechanism 2, which is disposed on the first guide groove 11 and is used to install an engine; a second fixing mechanism 3, which is disposed on the second guide groove 12 and is used to install a gearbox; and a support mechanism 4, which is disposed on the base plate 1 and is used to adjust the angle of the engine output end.

[0037] The base plate 1 serves as the foundation of the test bench and can be designed as a rectangle. A rectangle provides a larger contact area, offering more stable support and reducing shaking and instability during testing. The base plate 1 can be made of wear-resistant composite steel plate, such as KNM60 wear-resistant composite steel plate, which has high wear resistance, thereby improving the reliability and safety of the entire test bench.

[0038] There are two first fixing mechanisms 2, with the engine installed between the two first fixing mechanisms 2. The first guide groove 11 is used to adjust the distance between the first fixing mechanisms 2, so that the first fixing mechanism 2 can be matched to install any existing model and size engine. There are two second fixing mechanisms 3, with the gearbox installed between the two second fixing mechanisms 3. The second guide groove 12 is used to adjust the distance between the first fixing mechanism 2 and the second fixing mechanism 3, so that the second fixing mechanism 3 can be matched to install any existing model and size gearbox, and can reproduce the actual installation angle of the whole vehicle.

[0039] This mine car powertrain test bench allows for the initial setup of the engine. After fixing the engine to the first fixing mechanism 2, some engine models may experience an unsupported output end, posing a risk of breaking the mounting point. The support mechanism 4 supports the engine output end. Furthermore, because the engine mount itself is a rubber gasket with a certain degree of flexibility, adjusting the support mechanism 4 allows for fine-tuning of the engine output end angle, ensuring better connection to the gearbox. Most existing powertrain test benches require the gearbox to be installed and fixed first, followed by engine connection. This application, by incorporating the support mechanism 4, solves the problem of not being able to fix the engine first during the powertrain test bench setup process.

[0040] In one illustrative embodiment, such as Figure 3 and Figure 4 As shown, the first fixing mechanism 2 includes: a first base 21, mounted on the first guide groove 11; a first support column 22, disposed on the first base 21; and a first suspension mounting member 23, disposed on the first support column 22, wherein the first suspension mounting member 23 is provided with a plurality of mounting surfaces at different angles for mounting the engine.

[0041] The first base 21 can be rectangular to support other components. The first base 21 has through holes for mounting bolts on both sides. A first guide groove 11 corresponds to these through holes, allowing the bolts to pass through and slide within the guide groove 11. During use, based on the mine car engine data model or on-site surveying, the distance and installation angle between the left and right suspension mounts of the engine are measured. Based on this distance, the bolts are loosened, allowing the first base 21 to slide on the first guide groove 11, thus adjusting the distance between the two first fixing mechanisms 2. After the distance between the two first fixing mechanisms 2 is adjusted, the bolts are tightened to fix the first base 21 onto the first guide groove 11. Then, the engine is installed on the first suspension mount 23.

[0042] Furthermore, two first support columns 22 can be provided on the first base 21. The provision of two first support columns 22 can enhance the stability of the structure and ensure the stability and safety of the equipment. A transverse reinforcing rib 24 can be provided between the two first support columns 22. The transverse reinforcing rib 24 can increase the overall stability of the structure, especially when subjected to lateral forces or torques, and can effectively resist deformation.

[0043] Furthermore, the first support column 22 is provided with triangular reinforcing ribs 25. Through its unique geometric shape, the triangular reinforcing ribs 25 can effectively disperse and resist external forces, thereby enhancing the overall strength of the first support column 22.

[0044] In one illustrative embodiment, such as Figure 4 As shown, the mounting surface includes a first mounting surface 231, a second mounting surface 232, and a third mounting surface 233. The first mounting surface 231 is positioned above the second mounting surface 232, and the second mounting surface 232 is positioned above the third mounting surface 233. The third mounting surface 233 is vertically positioned. The first mounting surface 231 has a first included angle with the vertical direction, and the second mounting surface 232 has a second included angle with the vertical direction. The first included angle is greater than the second included angle.

[0045] The first suspension mounting component 23 includes a mounting plate with an arc-shaped reinforcing rib 234. A first mounting surface 231, a second mounting surface 232, and a third mounting surface 233 are provided on the arc-shaped reinforcing rib 234. The three mounting surfaces are provided, and the angle of each mounting surface is different. This arrangement is to match the existing model size of the engine. Through extensive theoretical research, the inventors discovered that engine mount installation angles are categorized into vertical, angles between the engine mount and the vertical direction of approximately 40°–45°, and angles between the engine mount and the vertical direction of approximately 20°–30°. Thus, the third mounting surface 233 is vertically positioned to match engine mount installation angles that are vertical. The first mounting surface 231 has a first angle with the vertical direction, which can be set at 40°–45° to match engine mount installation angles between the engine mount and the vertical direction of approximately 40°–45°. The second mounting surface 232 has a second angle with the vertical direction, which can be set at 20°–30° to match engine mount installation angles between the engine mount and the vertical direction of approximately 20°–30°, thereby enabling the installation of engines of any existing model and size.

[0046] In one illustrative embodiment, such as Figure 5 and Figure 6 As shown, the second fixing mechanism 3 includes: a second base 31, mounted on the second guide groove 12; a second support column 32, disposed on the second base 31; and a second suspension mounting member 33, disposed on the second support column 32, the second suspension mounting member 33 being used to install the gearbox.

[0047] The function of the second base 31 is the same as that of the first base 21, and will not be repeated here. The second support column 32 can be made of H-shaped steel. H-shaped steel has a higher section modulus and moment of inertia, and can withstand larger loads and bending moments. Compared with ordinary steel, H-shaped steel has a lighter weight under the same load-bearing capacity, which helps to reduce the self-weight of the structure.

[0048] During use, based on the transmission data model or on-site surveying, the distance between the left and right suspension mounts of the transmission and the distance from the mounts to the engine output are measured. Based on the distance data between the left and right suspension mounts of the transmission, a suitable second suspension mount 33 is selected. Based on the distance data from the transmission to the engine output, the distance between the first fixing mechanism 2 and the second fixing mechanism 3 is adjusted by loosening the bolts and allowing the second base 31 to slide on the second guide groove 12. After the distance between the first fixing mechanism 2 and the second fixing mechanism 3 is adjusted, the bolts are tightened to fix the second base 31 on the second guide groove 12. Then, the transmission is installed on the second suspension mount 33.

[0049] In one illustrative embodiment, the second support column 32 is provided with a plurality of equally spaced mounting holes 321, which are used to install the second suspension mounting member 33.

[0050] The main function of the mounting holes 321 is to provide connection and fixing points. By installing bolts, nuts, or other fasteners in these holes, the second support column 32 and the second suspension mount 33 can be connected to form a whole. The equidistant setting allows for the selection of different hole positions to adjust the vertical height of the second suspension mount 33, so that the gearbox can be installed at the same mounting angle as the engine output end.

[0051] In one illustrative embodiment, such as Figure 6 As shown, a rubber pad 331 is provided on the second suspension mount 33. Due to its good elasticity, the rubber pad 331 can effectively absorb and disperse vibration energy, thereby playing a role in shock absorption and vibration isolation. By reducing vibration, it can also effectively reduce noise levels. At the same time, the rubber pad 331 can fill and adapt to the small gap between the second suspension mount 33 and the gearbox mount, thereby preventing connection failure caused by loosening or vibration.

[0052] In one illustrative embodiment, such as Figure 7 As shown, the support mechanism 4 includes: a housing 44, mounted on the base plate 1; a lead screw 42, the bottom end of which is located in the housing 44, and the top end of which is located above the housing 44; an arc plate 41, located at the top end of the lead screw 42, which is used to support the engine output end; and a height adjustment disc 43, which is used to control the lead screw 42 to raise or lower the arc plate 41.

[0053] The lead screw 42 is a mechanical component that converts rotary motion into linear motion. When the lead screw 42 rotates, it generates linear displacement along its axis. The height adjustment disc 43 can mesh with the lead screw 42 via a bevel gear. When the height adjustment disc 43 rotates, it drives the lead screw 42 to rotate, thereby causing the arc plate 41 to rise or fall. In use, after the engine is fixed to the first fixing mechanism 2, the height adjustment disc 43 is used to adjust the arc plate 41 to rise or fall according to the engine installation angle data, thereby fine-tuning the height angle of the engine output end, so that the flywheel at the engine output end and the input end of the gearbox can be bolted together more quickly.

[0054] In one illustrative embodiment, such as Figure 2 As shown, the base plate 1 is provided with a first tool insertion hole 15 and a second tool insertion hole 16. The first tool insertion hole 15 is located next to the first guide groove 11, and the second tool insertion hole 16 is located next to the second guide groove 12. The first tool insertion hole 15 and the second tool insertion hole 16 are openings that allow tools to be inserted, which facilitates the operator to tighten or loosen the bolts.

[0055] Furthermore, shims 19 are provided around the bottom of the base plate 1 to ensure a certain gap between the base plate 1 and the ground or other supporting surfaces, providing operating space for the operator. At the same time, the shims 19 isolate the base plate 1 from the ground or other supporting surfaces, reducing friction and wear between the base plate 1 and the contact surface, and extending the service life of the base plate 1.

[0056] In one illustrative embodiment, the base plate 1 is provided with a first limiting block 13 and a second limiting block 14. The first limiting block 13 is disposed on both sides of the first base 21 to limit the movement of the first base 21, so that the first base 21 can only move between the two first limiting blocks 13. When the distance reaches the requirement, it is directly fixed and no further adjustment is needed for alignment. The second limiting block 14 is disposed on both sides of the second base 31 to limit the movement of the second base 31, so that the second base 31 can only move between the two second limiting blocks 14. When the distance reaches the requirement, it is directly fixed and no further adjustment is needed for alignment.

[0057] In one illustrative embodiment, a lifting ring 18 is provided on the base plate 1. The lifting rings 18 are located at the four corners of the base plate 1 and are used to lift and move the base plate 1 and the workpieces on it as a whole. In use, after the engine and gearbox are connected and fixed, the base plate 1 is hoisted to the test bench fixed floor and connected to the load motor, torque meter and other test equipment. After the whole is fixed, auxiliary test facilities such as exhaust system, cooling system, and oil supply system are then built.

[0058] Furthermore, the base plate 1 is provided with a frame fixing groove 17 for connecting and fixing the base plate 1 to the test bench fixing floor. The frame fixing groove 17 can be located at the edge, center or other specific position of the base plate 1 to allow for alignment and connection with other components.

[0059] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "exemplary model," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A test bench for a mining car powertrain, characterized in that, include: A base plate (1) is provided with a first guide groove (11) and a second guide groove (12); The first fixing mechanism (2) is disposed on the first guide groove (11) and is used to install the engine; The second fixing mechanism (3) is disposed on the second guide groove (12) and is used to install the gearbox; Support mechanism (4) is disposed on the base plate (1) and is used to adjust the angle of the engine output end.

2. The mine car powertrain test bench as described in claim 1, characterized in that, The first fixing mechanism (2) includes: The first base (21) is installed on the first guide groove (11); The first support column (22) is disposed on the first base (21); The first suspension mount (23) is mounted on the first support column (22), and the first suspension mount (23) has several mounting surfaces at different angles for mounting the engine.

3. The mine car powertrain test bench as described in claim 2, characterized in that, The mounting surface includes: a first mounting surface (231), a second mounting surface (232), and a third mounting surface (233), wherein the first mounting surface (231) is disposed above the second mounting surface (232), and the second mounting surface (232) is disposed above the third mounting surface (233); The third mounting surface (233) is vertically arranged, the first mounting surface (231) has a first included angle with the vertical direction, the second mounting surface (232) has a second included angle with the vertical direction, and the first included angle is greater than the second included angle.

4. The mine car powertrain test bench as described in claim 1, characterized in that, The second fixing mechanism (3) includes: The second base (31) is installed on the second guide groove (12); The second support column (32) is disposed on the second base (31); A second suspension mount (33) is disposed on the second support column (32) and is used to mount the gearbox.

5. A test bench for a mining car powertrain as described in claim 4, characterized in that, The second support column (32) is provided with a plurality of equally spaced mounting holes (321), which are used to install the second suspension mounting component (33).

6. A test bench for a mining car powertrain as described in claim 4, characterized in that, The second suspension mount (33) is provided with a rubber pad (331).

7. A test bench for a mining car powertrain as described in claim 1, characterized in that, The support mechanism (4) includes: The housing (44) is mounted on the base plate (1); A lead screw (42), the bottom end of which is disposed in the housing (44), and the top end of which is disposed above the housing (44); An arc-shaped plate (41) is disposed at the top of the lead screw (42), and the arc-shaped plate (41) is used to support the engine output end; The height adjustment disc (43) is used to control the lead screw (42) to raise or lower the arc plate (41).

8. A test bench for a mining car powertrain as described in claim 1, characterized in that, The base plate (1) is provided with a first tool insertion hole (15) and a second tool insertion hole (16).

9. A test bench for a mining car powertrain as described in claim 1, characterized in that, The base plate (1) is provided with a first limiting block (13) and a second limiting block (14).

10. A test bench for a mining car powertrain as described in claim 1, characterized in that, The base plate (1) is provided with a lifting ring (18).

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